CA2042925C - Power switching apparatus having improved power switching timing - Google Patents
Power switching apparatus having improved power switching timingInfo
- Publication number
- CA2042925C CA2042925C CA002042925A CA2042925A CA2042925C CA 2042925 C CA2042925 C CA 2042925C CA 002042925 A CA002042925 A CA 002042925A CA 2042925 A CA2042925 A CA 2042925A CA 2042925 C CA2042925 C CA 2042925C
- Authority
- CA
- Canada
- Prior art keywords
- sun gear
- driven
- power switching
- switching apparatus
- gear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
- F16H3/20—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially using gears that can be moved out of gear
- F16H3/40—Gearings for reversal only
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/0461—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa part of the apparatus being used in common for reading and reproducing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/0464—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa capable of performing non-simultaneous scanning at more than one scanning station
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/12—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using the sheet-feed movement or the medium-advance or the drum-rotation movement as the slow scanning component, e.g. arrangements for the main-scanning
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/19—Gearing
- Y10T74/19219—Interchangeably locked
- Y10T74/19358—Laterally slidable gears
- Y10T74/19367—Swinging carriage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/19—Gearing
- Y10T74/19502—Pivotally supported
- Y10T74/19516—Spur
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Mechanical Engineering (AREA)
- Facsimiles In General (AREA)
- Transmission Devices (AREA)
- Fax Reproducing Arrangements (AREA)
Abstract
A power switching apparatus in accordance with the present invention includes a sun gear which can be driven to rotate in either direction, an arm which can swing freely relative to the rotating axis of the sun gear, a planetary gear pivotally provided on the arm for engaging with the sun gear, a pair of driven gears disposed a prescribed distance apart from each other in the circumferential direction of the sun gear so that each of said driven gears can engage with the planetary gear independently, and a control device for controlling the position of the planetary gear so as to engage the planetary gear with one of the driven gears before the rotation of the sun gear is initiated.
Description
2042~25 Power Switching Apparatus Having Improved Power Switching Timing The present invention relates generally to a power switching apparatus and, more particularly, to a power switching apparatus for transmitting a driving force created by one driving power source to two systems of gear 5 groups, dependent on the direction of rotation.
Unlike with a facsimile machine having separate driving means and structures for supporting the driving means for transmission and reception, a facsimile machine utilizing a single shared driving means for both transmission and reception has the advantages that not only the entire apparatus can be made 10 compact and less costly but also operational noises and power consumption can be reduced, and maintenance thereof can be simplified.
Figures 6A and 6B are views showing a rotatable transmission structure which can be incorporated in such a facsimile machine, for instance, the one disclosed in laid-open Japanese Patent Publication No. 61-184248.
Referring to the figures, the structure and operation thereof will be briefly described.
As shown in Figure 6A, a driving motor 102 normally rotates to cause a worm 103 to rotate in the direction of arrow a, thereby rotating a sun gear 107 in the direction of arrow b. The rotation of the sun gear 107 drives a swinging arm 110 friction-coupled thereto to swing in the direction of arrow c to a firstposition, thereby engaging a second planetary gear 115 with a first gear 119, sothat the gear 119 is rotated in the direction of arrow d. When the driving motor102 is reversely rotated, as shown in Figure 6B, the worm 103 is rotated in the direction of arrow e to rotate the sun gear 107 in the direction of arrow f. Therotation of the sun gear 107 then drives the swinging arm 110 friction-coupled thereto to swing in the direction of arrow g from the first position to a secondposition, thereby engaging a first planetary gear 113 with a second gear 121, sothat the gear 121 is rotated in the direction of arrow h. The first and second gears 119 and 121 are coupled to two systems of gear groups, respectively, and, therefore, each being rotated, drive the respective gear groups to rotate.
In such a structure, even with only one driving power source (the driving motor 102), the transmission system with rotatable movement can be i~ , 2 2042~25 shifted between alternate positions by reversing the direction of rotation thereof, to adapt to transmission operation or reception operation by a facsimile or other machine.
In other words, a power switching apparatus is implemented by 5 driving a sun gear to rotate by power generated by a motor, providing planetary gears to be engaged to the sun gear pivotally around an arm that is disposed around the rotating axis of the sun gear and is able to swing freely, and by providing a pair of driven gears at a set distance apart from each other in the circumferential direction of the sun gear.
10The sun gear 107 is driven to rotate in one direction in a time period W1 as shown in Figure 7, thereby driving the driven gear 119 to rotate to feed an original for transmission. During reception the sun gear 107 is driven to rotatereversely in a period W2 to carry a sheet of recording paper, thereby driving the other driven gear 121. When the sun gear 107 rotates in one direction, the driven 15gear 119 rotates with a time delay of l\W1, shown in Figure 6. The time ~W1 isthe time required for the planetary gear 115 to be engaged with the driven gear 1 19. When the sun gear 107 reverses direction, the other driven gear 121 rotates with a time delay of l\W2. The time delays ~\W1 and ~W2 vary in accordance with the angular position at which an arm 110 stops, which varies due to friction 20 and other factors. The time delay aw1 and the time delay ~W2 fluctuate accordingly.
Such fluctuation in time delay gives rise to the following problems in a conventional power switching apparatus.
In a facsimile machine capable of both transmission and reception, 25 an original may be carried after the delay ~W1 has elapsed since a sun gear was driven to rotate to read the original. For example, variation in the time delay ~\W1 may cause a change in the arrival time of the original at a reading head. This causes variation in a reading initiation time, accordingly. It is desired to transmit the original image accurately by advancing the reading initiation time to 30 correspond with the start of the original. It is desirable that such time delays l\W1 and I~W2 in the operation of the respective driving gears be constant, not only in a facsimile machine capable of both transmission and reception as described ~' ~,.
2Q4292~
above, but also in any other apparati having such a power s itching structure.
One object of the present invention is to achieve power switching in a power switching apparatus at high accuracy.
Another object of the present invention is to achieve power switching in a power switching apparatus with accurate timing.
In order to achieve the above described objects, a power switching apparatus in accordance with the present invention includes a sun gear which canbe driven to rotate in either direction; an arm which can swing freely relative to the rotating axis of the sun gear; a planetary gear rotatably provided at the arm for engaging with the sun gear; a pair of driving gears disposed a prescribed distance apart from each other in the circumferential direction of the sun gear so that each of the driven gears can engage with the sun gear independently; and control means for controlling the position of the planetary gear so that the planetary gear engages with one of the driven gears before the initiation of therotation of the sun gear.
The power switching apparatus having such a structure as described above can achieve the power switching with accurate timing because the planetary gear is engaged with a prescribed driven gear before the rotation of the sun gear.
The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.
Figure 1 is a block diagram showing an electrical structure of a facsimile machine in accordance with one embodiment of the present invention;
Figure 2 is a sectional view showing a structure of a power switching apparatus incorporated in the facsimile machine shown in Figure 1;
Figure 3 is a view showing a part of the structure shown in Figure 2 by way of simplification;
Figure 4 is a flow chart showing the control of the processing circuit shown in Figure 1;
Figure 5 is a waveform chart showing the operation of a sun gear 204~925 and two driven gears, for explaining the control operation by the processing circuit shown in Figure 1;
Figures 6A and 6B are views showing a structure of a conventional power switching apparatus; and Figure 7 is a waveform chart showing the operation of each of the gears of the apparatus of Figures 6A and 6B, for explaining the operation of theconventional power switching apparatus.
In Figure 1 a processing circuit 23 implemented with a microcomputer is connected to a telephone line 24a. A reception detection device 24 detects facsimile reception, and a recording head 10 is operated upon reception. An original is facsimile-transmitted by pressing a transmission button 25, and a reading head 7 operates during transmission. Both in transmission and reception,a pulse motor 30 is driven.
In Figure 2, upon transmission, an original 1 is fed interposed between a pair of rollers 3 and 4 through a guide member 2, to be fed in the direction of arrow 6 through a guide member 5. The contents of the original are read by the reading head 7, e.g. a line image sensor. The data on the original image read by the reading head 7 is transmitted through the telephone line 24a, etc. shown in Figure 1.
Upon reception, an image received through the telephone line 24a is recorded by the recording head 10. A platen roller 9 intermittently pressure-contacts a sheet of heat-sensitive recording paper, pulled off a roll 8. This recorded paper is discharged through a guide member 11, as shown by arrow 12.
Fixed to the roller 3 and the platen roller 9 are respective driven gears 13 and 14.
The sun gear 15 is fixed to a rotating axis 16, and is driven to rotate by the pulse motor 30, which is capable of rotating normally and reversely. The rotating axis 16 is inserted through the sleeve 18 of the arm 17, and, therefore, the arm 17 can swing around the rotating axis 16 of the sun gear 15. The planetary gear 19 to be engaged with the sun gear 15 is pivotally mounted at thetip of the arm 17. The driven gears 13 and 14 are disposed a prescribed distanceapart from each other in the circumferential direction of the sun gear 15 so that the planetary gear 19 can engage with the driven gears 13 and 14 selectively, f , .
. "-2042~25 depending upon the position of gear 19.
With reference to Figure 3, the sun gear 15 rotates clockwise tocause the line along the axis of the arm 17 to move to a position represented by reference numeral 21, and the planetary gear 19 engages with the driven gear 13,5 thereby performing a reading operation. On the other hand, the sun gear 15 rotates anti-clockwise to cause the axis line of the arm 17 to move to a position represented by reference numeral 22, so that the planetary gear 19 engages with the driven gear 14, thereby performing a recording operation.
Figure 4 is a flow chart showing the operation of the processing circuit 23 shown in Figure 1, and Figure 5 is a waveform chart for the sun gear 15 and the driven gears 13 and 14, clarifying the operation of the processing circuit 23.
In step S1, the power supply switch is turned on to start the process.
In step S2, initialization is executed. In other words, the sun gear 15 is rotated clockwise as shown by reference numeral 27 in Figure 2 in a time period from t1 15 to t3 in Figure 5, thereby executing initialization. The planetary gear 19 thus moves toward the driven gear 13 to engage therewith, and the driven gear 13 rotates slightly in a time period from t2 to t3 as shown in Figure 5. In step S3, the engagement state is maintained, as in a stand-by state.
In step S4, it is determined if transmission button 25 has been 20 pressed. If transmission button 25 has been pressed, the flow proceeds to step S5 for transmission operation, and the sun gear 15 is driven to rotate in the direction of arrow 27 by a pulse motor 30 in time t4. Power from the sun gear 15immediately drives the roller 3, through the planetary gear 19 and the driven gear 13, in a time period t4 - t5, since planetary gear 19 is already engaged with the 25 driven gear 13. Also, the rotation of the roller 3 drives the roller 4 in contact with the roller 3 so that the original 1 interposed between these rollers is fed in the direction of arrow 6. The fed original image is read by the reading head 7 to perform the facsimile transmission.
In step S6, the initialization state, i.e. the state in which planetary gear 30 19 is engaged with the driven gear 13, is maintained by the rotation of the sun gear 15 in the direction of arrow 27 as described above.
In step S4, if it is determined that the apparatus is not in a .? :`:
transmission operation, in other words a facsimile reception state is detected by the reception detection device 24, the pulse motor 30 drives the sun gear 15 to rotate reversely to the direction of arrow 27. The planetary gear 19 therefore moves in accordance with the anticlockwise rotation of the sun gear 15 from the 5 axis line position 21 (see Figure 3) to the axis line position 22, so that planetary gear 19 engages with the driven gear 14 in time t7. The driven gear 14 is thus driven to rotate by the sun gear 15 during a time period from t7 to t8, and the sheet of recording paper 8 on which the received data is recorded by the recording head 10 is discharged in the direction of arrow 12. The reception 10 operation being completed, the pulse motor 30 drives the sun gear 15 to rotate in the direction of arrow 27 in a time period t9 - t11 in an initialization operation.
The planetary gear 19 therefore moves to the axis line position 21 from the axisline position 22, to engage with the driven gear 13. The driven gear 13 rotates slightly in a time period from t10 - t11 as shown in Figure 5.
In this embodiment, when the sun gear 15 is not driven, the planetary gear 19 and the arm 17 spontaneously return to the position 21 by their own weights so that the initialization operation is achieved in a stable manner.
Although the planetary gear 19 returns to the side of the driven gear by its ownweight, springs, etc. may be used to constantly bias the planetary gear toward 20 one of the driven gears.
Thus, for a transmission, the power of sun gear 15 is immediately transmitted to the driven gear 13 through the planetary gear 19 by the pulse motor 30 in time t4. In other words, the driving force of the pulse motor 30 is immediately transmitted to the rollers 3 and 4. Also, on a reception, when sun 25 gear 15 is rotated at a constant angular speed by the pulse motor 30, the planetary gear 19 engages the driven gear 14 after a constant time W0 from t6 to t7. Thus, both in the transmission operation and the reception operation, theoriginal 1 and the sheet of recording paper 8 can be fed with accurate timing.
Although in the above-described embodiment the planetary gear 19 30 is positioned on the side of the driven gear 13 as in a stand-by state, it goes without saying that a similar effect can be obtained if the planetary gear 19 ispositioned on the side of the driven gear 14 in the stand-by state.
20429~5 In an alternative embodiment, an electromagnetic solenoid may be provided to shift the arm 17 angularly in the clockwise direction shown in Figure 2, to always place the planetary gear 19 in the same initial position.
Although in the above described embodiment, the present invention 5 is applied to a facsimile machine, the present invention can be applied similarly to power switching apparati in other fields having similar structures.
Although the present invention has been described and illustrated in detail, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, the spirit and scope of the present 10 invention being limited only by the terms of the appended claims.
Unlike with a facsimile machine having separate driving means and structures for supporting the driving means for transmission and reception, a facsimile machine utilizing a single shared driving means for both transmission and reception has the advantages that not only the entire apparatus can be made 10 compact and less costly but also operational noises and power consumption can be reduced, and maintenance thereof can be simplified.
Figures 6A and 6B are views showing a rotatable transmission structure which can be incorporated in such a facsimile machine, for instance, the one disclosed in laid-open Japanese Patent Publication No. 61-184248.
Referring to the figures, the structure and operation thereof will be briefly described.
As shown in Figure 6A, a driving motor 102 normally rotates to cause a worm 103 to rotate in the direction of arrow a, thereby rotating a sun gear 107 in the direction of arrow b. The rotation of the sun gear 107 drives a swinging arm 110 friction-coupled thereto to swing in the direction of arrow c to a firstposition, thereby engaging a second planetary gear 115 with a first gear 119, sothat the gear 119 is rotated in the direction of arrow d. When the driving motor102 is reversely rotated, as shown in Figure 6B, the worm 103 is rotated in the direction of arrow e to rotate the sun gear 107 in the direction of arrow f. Therotation of the sun gear 107 then drives the swinging arm 110 friction-coupled thereto to swing in the direction of arrow g from the first position to a secondposition, thereby engaging a first planetary gear 113 with a second gear 121, sothat the gear 121 is rotated in the direction of arrow h. The first and second gears 119 and 121 are coupled to two systems of gear groups, respectively, and, therefore, each being rotated, drive the respective gear groups to rotate.
In such a structure, even with only one driving power source (the driving motor 102), the transmission system with rotatable movement can be i~ , 2 2042~25 shifted between alternate positions by reversing the direction of rotation thereof, to adapt to transmission operation or reception operation by a facsimile or other machine.
In other words, a power switching apparatus is implemented by 5 driving a sun gear to rotate by power generated by a motor, providing planetary gears to be engaged to the sun gear pivotally around an arm that is disposed around the rotating axis of the sun gear and is able to swing freely, and by providing a pair of driven gears at a set distance apart from each other in the circumferential direction of the sun gear.
10The sun gear 107 is driven to rotate in one direction in a time period W1 as shown in Figure 7, thereby driving the driven gear 119 to rotate to feed an original for transmission. During reception the sun gear 107 is driven to rotatereversely in a period W2 to carry a sheet of recording paper, thereby driving the other driven gear 121. When the sun gear 107 rotates in one direction, the driven 15gear 119 rotates with a time delay of l\W1, shown in Figure 6. The time ~W1 isthe time required for the planetary gear 115 to be engaged with the driven gear 1 19. When the sun gear 107 reverses direction, the other driven gear 121 rotates with a time delay of l\W2. The time delays ~\W1 and ~W2 vary in accordance with the angular position at which an arm 110 stops, which varies due to friction 20 and other factors. The time delay aw1 and the time delay ~W2 fluctuate accordingly.
Such fluctuation in time delay gives rise to the following problems in a conventional power switching apparatus.
In a facsimile machine capable of both transmission and reception, 25 an original may be carried after the delay ~W1 has elapsed since a sun gear was driven to rotate to read the original. For example, variation in the time delay ~\W1 may cause a change in the arrival time of the original at a reading head. This causes variation in a reading initiation time, accordingly. It is desired to transmit the original image accurately by advancing the reading initiation time to 30 correspond with the start of the original. It is desirable that such time delays l\W1 and I~W2 in the operation of the respective driving gears be constant, not only in a facsimile machine capable of both transmission and reception as described ~' ~,.
2Q4292~
above, but also in any other apparati having such a power s itching structure.
One object of the present invention is to achieve power switching in a power switching apparatus at high accuracy.
Another object of the present invention is to achieve power switching in a power switching apparatus with accurate timing.
In order to achieve the above described objects, a power switching apparatus in accordance with the present invention includes a sun gear which canbe driven to rotate in either direction; an arm which can swing freely relative to the rotating axis of the sun gear; a planetary gear rotatably provided at the arm for engaging with the sun gear; a pair of driving gears disposed a prescribed distance apart from each other in the circumferential direction of the sun gear so that each of the driven gears can engage with the sun gear independently; and control means for controlling the position of the planetary gear so that the planetary gear engages with one of the driven gears before the initiation of therotation of the sun gear.
The power switching apparatus having such a structure as described above can achieve the power switching with accurate timing because the planetary gear is engaged with a prescribed driven gear before the rotation of the sun gear.
The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.
Figure 1 is a block diagram showing an electrical structure of a facsimile machine in accordance with one embodiment of the present invention;
Figure 2 is a sectional view showing a structure of a power switching apparatus incorporated in the facsimile machine shown in Figure 1;
Figure 3 is a view showing a part of the structure shown in Figure 2 by way of simplification;
Figure 4 is a flow chart showing the control of the processing circuit shown in Figure 1;
Figure 5 is a waveform chart showing the operation of a sun gear 204~925 and two driven gears, for explaining the control operation by the processing circuit shown in Figure 1;
Figures 6A and 6B are views showing a structure of a conventional power switching apparatus; and Figure 7 is a waveform chart showing the operation of each of the gears of the apparatus of Figures 6A and 6B, for explaining the operation of theconventional power switching apparatus.
In Figure 1 a processing circuit 23 implemented with a microcomputer is connected to a telephone line 24a. A reception detection device 24 detects facsimile reception, and a recording head 10 is operated upon reception. An original is facsimile-transmitted by pressing a transmission button 25, and a reading head 7 operates during transmission. Both in transmission and reception,a pulse motor 30 is driven.
In Figure 2, upon transmission, an original 1 is fed interposed between a pair of rollers 3 and 4 through a guide member 2, to be fed in the direction of arrow 6 through a guide member 5. The contents of the original are read by the reading head 7, e.g. a line image sensor. The data on the original image read by the reading head 7 is transmitted through the telephone line 24a, etc. shown in Figure 1.
Upon reception, an image received through the telephone line 24a is recorded by the recording head 10. A platen roller 9 intermittently pressure-contacts a sheet of heat-sensitive recording paper, pulled off a roll 8. This recorded paper is discharged through a guide member 11, as shown by arrow 12.
Fixed to the roller 3 and the platen roller 9 are respective driven gears 13 and 14.
The sun gear 15 is fixed to a rotating axis 16, and is driven to rotate by the pulse motor 30, which is capable of rotating normally and reversely. The rotating axis 16 is inserted through the sleeve 18 of the arm 17, and, therefore, the arm 17 can swing around the rotating axis 16 of the sun gear 15. The planetary gear 19 to be engaged with the sun gear 15 is pivotally mounted at thetip of the arm 17. The driven gears 13 and 14 are disposed a prescribed distanceapart from each other in the circumferential direction of the sun gear 15 so that the planetary gear 19 can engage with the driven gears 13 and 14 selectively, f , .
. "-2042~25 depending upon the position of gear 19.
With reference to Figure 3, the sun gear 15 rotates clockwise tocause the line along the axis of the arm 17 to move to a position represented by reference numeral 21, and the planetary gear 19 engages with the driven gear 13,5 thereby performing a reading operation. On the other hand, the sun gear 15 rotates anti-clockwise to cause the axis line of the arm 17 to move to a position represented by reference numeral 22, so that the planetary gear 19 engages with the driven gear 14, thereby performing a recording operation.
Figure 4 is a flow chart showing the operation of the processing circuit 23 shown in Figure 1, and Figure 5 is a waveform chart for the sun gear 15 and the driven gears 13 and 14, clarifying the operation of the processing circuit 23.
In step S1, the power supply switch is turned on to start the process.
In step S2, initialization is executed. In other words, the sun gear 15 is rotated clockwise as shown by reference numeral 27 in Figure 2 in a time period from t1 15 to t3 in Figure 5, thereby executing initialization. The planetary gear 19 thus moves toward the driven gear 13 to engage therewith, and the driven gear 13 rotates slightly in a time period from t2 to t3 as shown in Figure 5. In step S3, the engagement state is maintained, as in a stand-by state.
In step S4, it is determined if transmission button 25 has been 20 pressed. If transmission button 25 has been pressed, the flow proceeds to step S5 for transmission operation, and the sun gear 15 is driven to rotate in the direction of arrow 27 by a pulse motor 30 in time t4. Power from the sun gear 15immediately drives the roller 3, through the planetary gear 19 and the driven gear 13, in a time period t4 - t5, since planetary gear 19 is already engaged with the 25 driven gear 13. Also, the rotation of the roller 3 drives the roller 4 in contact with the roller 3 so that the original 1 interposed between these rollers is fed in the direction of arrow 6. The fed original image is read by the reading head 7 to perform the facsimile transmission.
In step S6, the initialization state, i.e. the state in which planetary gear 30 19 is engaged with the driven gear 13, is maintained by the rotation of the sun gear 15 in the direction of arrow 27 as described above.
In step S4, if it is determined that the apparatus is not in a .? :`:
transmission operation, in other words a facsimile reception state is detected by the reception detection device 24, the pulse motor 30 drives the sun gear 15 to rotate reversely to the direction of arrow 27. The planetary gear 19 therefore moves in accordance with the anticlockwise rotation of the sun gear 15 from the 5 axis line position 21 (see Figure 3) to the axis line position 22, so that planetary gear 19 engages with the driven gear 14 in time t7. The driven gear 14 is thus driven to rotate by the sun gear 15 during a time period from t7 to t8, and the sheet of recording paper 8 on which the received data is recorded by the recording head 10 is discharged in the direction of arrow 12. The reception 10 operation being completed, the pulse motor 30 drives the sun gear 15 to rotate in the direction of arrow 27 in a time period t9 - t11 in an initialization operation.
The planetary gear 19 therefore moves to the axis line position 21 from the axisline position 22, to engage with the driven gear 13. The driven gear 13 rotates slightly in a time period from t10 - t11 as shown in Figure 5.
In this embodiment, when the sun gear 15 is not driven, the planetary gear 19 and the arm 17 spontaneously return to the position 21 by their own weights so that the initialization operation is achieved in a stable manner.
Although the planetary gear 19 returns to the side of the driven gear by its ownweight, springs, etc. may be used to constantly bias the planetary gear toward 20 one of the driven gears.
Thus, for a transmission, the power of sun gear 15 is immediately transmitted to the driven gear 13 through the planetary gear 19 by the pulse motor 30 in time t4. In other words, the driving force of the pulse motor 30 is immediately transmitted to the rollers 3 and 4. Also, on a reception, when sun 25 gear 15 is rotated at a constant angular speed by the pulse motor 30, the planetary gear 19 engages the driven gear 14 after a constant time W0 from t6 to t7. Thus, both in the transmission operation and the reception operation, theoriginal 1 and the sheet of recording paper 8 can be fed with accurate timing.
Although in the above-described embodiment the planetary gear 19 30 is positioned on the side of the driven gear 13 as in a stand-by state, it goes without saying that a similar effect can be obtained if the planetary gear 19 ispositioned on the side of the driven gear 14 in the stand-by state.
20429~5 In an alternative embodiment, an electromagnetic solenoid may be provided to shift the arm 17 angularly in the clockwise direction shown in Figure 2, to always place the planetary gear 19 in the same initial position.
Although in the above described embodiment, the present invention 5 is applied to a facsimile machine, the present invention can be applied similarly to power switching apparati in other fields having similar structures.
Although the present invention has been described and illustrated in detail, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, the spirit and scope of the present 10 invention being limited only by the terms of the appended claims.
Claims (12)
1. A power switching apparatus, comprising:
a sun gear which can be driven to rotate in either direction;
an arm capable of swinging freely relative to the rotational axis of said sun gear;
a planetary gear pivotally mounted on said arm for engaging with said sun gear;
a pair of driven gears disposed a prescribed distance apart from each other in the circumferential direction of said sun gear so that each of said driven gears can engage with said planetary gear independently; and control means for controlling the position of said planetary gear so as to engage said planetary gear with one of said driven gears, before the initiation of the rotation of said sun gear.
a sun gear which can be driven to rotate in either direction;
an arm capable of swinging freely relative to the rotational axis of said sun gear;
a planetary gear pivotally mounted on said arm for engaging with said sun gear;
a pair of driven gears disposed a prescribed distance apart from each other in the circumferential direction of said sun gear so that each of said driven gears can engage with said planetary gear independently; and control means for controlling the position of said planetary gear so as to engage said planetary gear with one of said driven gears, before the initiation of the rotation of said sun gear.
2. The power switching apparatus in accordance with claim 1, wherein said control means rotates said sun gear in a prescribed direction in a prescribed time period when the driving of said sun gear in completed.
3. The power switching apparatus in accordance with claim 1, wherein said planetary gear moves by its own weight to engage with one of said driven gears when said sun gear is not driven to rotate.
4. The power switching apparatus in accordance with claim 1, and further comprising a pulse motor capable of rotating normally and reversely for driving said sun gear in a prescribed direction in response to a prescribed detection state.
5. A power switching apparatus used in a facsimile machine capable of both transmission operation and reception operation, comprising:
a sun gear which can be driven to rotate in either direction by one driving power source;
an arm which can swing freely on the rotational axis of said sun gear;
a planetary gear rotatably mounted on said arm for engaging with said sun gear;
a pair of driven gears one of which is driven in transmission operation and the other is driven in reception operation, each being disposed a prescribeddistance apart from each other in the circumferential direction of said sun gear so that each can engage with said planetary gear independently; and control means for controlling the position of said planetary gear so as to engage said planetary gear with one of said driven gears, before the initiation of the rotation of said sun gear.
a sun gear which can be driven to rotate in either direction by one driving power source;
an arm which can swing freely on the rotational axis of said sun gear;
a planetary gear rotatably mounted on said arm for engaging with said sun gear;
a pair of driven gears one of which is driven in transmission operation and the other is driven in reception operation, each being disposed a prescribeddistance apart from each other in the circumferential direction of said sun gear so that each can engage with said planetary gear independently; and control means for controlling the position of said planetary gear so as to engage said planetary gear with one of said driven gears, before the initiation of the rotation of said sun gear.
6. The power switching apparatus in accordance with claim 5, wherein said control means rotates said sun gear in a prescribed direction in a prescribed time period upon the completion of the driving of said sun gear.
7. The power switching apparatus in accordance with claim 5, wherein said planetary gear is moved by its own weight to engage with one of said driven gears when said sun gear is not driven to rotate.
8. The power switching apparatus in accordance with claim 5, wherein said driving power source comprises a pulse motor capable of rotating normally and reversely.
9. The power switching apparatus in accordance with claim 8, further comprising determining means for determining whether the apparatus is in a transmission state or a reception state, wherein said pulse motor drives said sun gear to rotate in a prescribed direction in response to the output of said determining means.
10. The power switching apparatus in accordance with claim 5, wherein one end of said arm is rotatably attached to the axis of said sun gear, and said planetary gear is attached to the other end of said arm.
11. A power switching apparatus, comprising:
driving means rotatable normally or reversely;
engaging means engaged with said driving means for moving in the circumferential direction of said driving means in accordance with the rotation movement of said driving means;
a pair of driven means disposed in such a position that each of said driven means engages with one of said engaging means moving in either direction based on a rotating direction of said driving means, the driving forcebeing transmitted to said driven means by the rotation of said driving means; and control means for moving said engaging means to engage with a prescribed one of said driven means.
driving means rotatable normally or reversely;
engaging means engaged with said driving means for moving in the circumferential direction of said driving means in accordance with the rotation movement of said driving means;
a pair of driven means disposed in such a position that each of said driven means engages with one of said engaging means moving in either direction based on a rotating direction of said driving means, the driving forcebeing transmitted to said driven means by the rotation of said driving means; and control means for moving said engaging means to engage with a prescribed one of said driven means.
12. The power switching apparatus in accordance with claim 11, wherein said control means drives said driving means in a prescribed direction in a prescribed time period after the rotation movement of said driving means is completed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2134311A JP2702261B2 (en) | 1990-05-23 | 1990-05-23 | Facsimile machine |
| JP2-134311 | 1990-05-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2042925A1 CA2042925A1 (en) | 1991-11-24 |
| CA2042925C true CA2042925C (en) | 1995-12-05 |
Family
ID=15125332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002042925A Expired - Lifetime CA2042925C (en) | 1990-05-23 | 1991-05-21 | Power switching apparatus having improved power switching timing |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5150630A (en) |
| EP (1) | EP0460832B1 (en) |
| JP (1) | JP2702261B2 (en) |
| CA (1) | CA2042925C (en) |
| DE (1) | DE69113320T2 (en) |
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|---|---|---|---|---|
| US5203217A (en) * | 1992-05-18 | 1993-04-20 | Pitney Bowes Inc. | Pivoting cover to separate pair of rollers |
| JPH07104360A (en) * | 1993-09-30 | 1995-04-21 | Minolta Co Ltd | Motor driving device |
| GB2305228B (en) * | 1995-09-12 | 1998-06-10 | Mitsui Mining & Smelting Co | A gear train selector mechanism for vehicle sliding doors |
| KR200147810Y1 (en) * | 1995-10-12 | 1999-06-15 | 윤종용 | Driving apparatus by one motor for facsimile |
| US6122456A (en) * | 1996-03-12 | 2000-09-19 | Asahi Kogaku Kogyo Kabushiki Kaisha | Movement control device |
| US5960671A (en) * | 1997-09-30 | 1999-10-05 | Philadelphia Gear Corp. | Eccentric pivotable mounting for changing gear reduction ratios |
| US20020187031A1 (en) * | 2001-06-08 | 2002-12-12 | Boyanich Joseph E. | Electrically actuated push plate assembly |
| ATE530013T1 (en) * | 2003-03-07 | 2011-11-15 | Sagemcom Documents Sas | INITIALIZATION PROCESS OF A DRIVE UNIT AND THE DRIVE UNIT |
| JP2005069450A (en) * | 2003-08-28 | 2005-03-17 | Tanashin Denki Co | Power change-over device for acoustic equipment |
| KR100561408B1 (en) * | 2003-12-01 | 2006-03-16 | 삼성전자주식회사 | Scanning apparatus and method preventing gear from damaging thereof |
| JP2006198628A (en) * | 2005-01-18 | 2006-08-03 | Fanuc Ltd | Arc welding equipment, and arc robot system |
| US7758038B2 (en) * | 2005-12-05 | 2010-07-20 | Silverbrook Research Pty Ltd | Printer having compact media pick-up device |
| US7547088B2 (en) * | 2005-12-05 | 2009-06-16 | Silverbrook Research Pty Ltd | Method of assembling pagewidth printhead capping arrangement |
| US7611239B2 (en) * | 2005-12-05 | 2009-11-03 | Silverbrook Research Pty Ltd | Printer having coded capping mechanism |
| US7632032B2 (en) * | 2005-12-05 | 2009-12-15 | Silverbrook Research Pty Ltd | Method of assembling printer media transport arrangement |
| US7681876B2 (en) * | 2005-12-05 | 2010-03-23 | Silverbrook Research Pty Ltd | Printer having disengageably gear driven media pick-up roller |
| US7735955B2 (en) * | 2005-12-05 | 2010-06-15 | Silverbrook Research Pty Ltd | Method of assembling printhead capping mechanism |
| FR2897135A1 (en) * | 2006-02-06 | 2007-08-10 | Jim Jean Leon Vinet | Gearbox output shaft selector e.g. for a roller shutter or cable drum comprises arm with toothed gear that can be switched between two output shafts |
| TWI320395B (en) * | 2007-02-09 | 2010-02-11 | Primax Electronics Ltd | An automatic duplex document feeder with a function of releasing paper jam |
| JP5371659B2 (en) * | 2009-09-25 | 2013-12-18 | 株式会社平和 | Movable accessory device |
| EA024795B1 (en) * | 2010-10-22 | 2016-10-31 | Нурлан Кубатович Максуталиев | Mechanical converter - power amplifier |
| DE102011113563A1 (en) * | 2011-09-19 | 2013-03-21 | Oerlikon Trading Ag, Trübbach | Carousel carriage for vacuum treatment plant |
| JP5966716B2 (en) * | 2012-07-20 | 2016-08-10 | ブラザー工業株式会社 | Gear transmission device and image forming apparatus |
| KR102384995B1 (en) | 2020-04-08 | 2022-04-08 | 정대헌 | Ossuary with internal lid |
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| DE591956C (en) * | 1933-05-23 | 1934-01-30 | Otto Foeppl | Resonance vibration damper for waveguides |
| DE645744C (en) * | 1935-05-07 | 1937-06-02 | Eickhoff Maschinenfabrik Geb | Reversing device for herringbone gear engines |
| US3028767A (en) * | 1960-07-26 | 1962-04-10 | Northrop Corp | Drive mechanism |
| FR1325666A (en) * | 1962-03-01 | 1963-05-03 | Cimt Comp Ind Mat Transport | Automatically alternating control device for two shafts, more specifically for a closing curtain for access to a vehicle |
| IT967080B (en) * | 1972-09-01 | 1974-02-28 | Honeywell Inf Systems | DEVICE FOR AUTOMATIC REVERSAL OF THE LONGITUDINAL MOVEMENT OF THE INKED RIBBON IN WRITING AND SIMILAR MACHINES |
| CH591957A5 (en) * | 1974-10-12 | 1977-10-14 | Agfa Gevaert Ag | Ink ribbon reversing drive - has arm with slot fitting motor spindle carrying gearwheels to swing over between spools |
| IT1115129B (en) * | 1979-04-03 | 1986-02-03 | Werbetronic Ag | IMPROVEMENT IN GEAR TRANSMISSION DEVICES WITH CHANGE OF OUTPUT FOR EVERY REVERSE OF MOTOR OF THE MOTOR BODY |
| GB2085534B (en) * | 1980-08-16 | 1983-05-25 | Harp Royall Engineering Ltd | A marine frictional roller transmission unit with forward and reverse transmission |
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| JPH0755741B2 (en) * | 1988-08-30 | 1995-06-14 | シャープ株式会社 | Facsimile device drive mechanism |
| DE3836246A1 (en) * | 1988-10-25 | 1990-04-26 | Philips Patentverwaltung | Assembly aid for a switching device on a magnetic tape apparatus |
| US5031471A (en) * | 1989-10-03 | 1991-07-16 | Takashi Watanabe | Sequence control mechanism employing gear mechanism |
-
1990
- 1990-05-23 JP JP2134311A patent/JP2702261B2/en not_active Expired - Lifetime
-
1991
- 1991-05-21 US US07/703,670 patent/US5150630A/en not_active Expired - Lifetime
- 1991-05-21 CA CA002042925A patent/CA2042925C/en not_active Expired - Lifetime
- 1991-05-23 EP EP91304668A patent/EP0460832B1/en not_active Expired - Lifetime
- 1991-05-23 DE DE69113320T patent/DE69113320T2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0429466A (en) | 1992-01-31 |
| CA2042925A1 (en) | 1991-11-24 |
| DE69113320D1 (en) | 1995-11-02 |
| US5150630A (en) | 1992-09-29 |
| EP0460832B1 (en) | 1995-09-27 |
| EP0460832A1 (en) | 1991-12-11 |
| DE69113320T2 (en) | 1996-04-18 |
| JP2702261B2 (en) | 1998-01-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |