CA2034583A1 - Feed table of a sheet-fed printing machine - Google Patents
Feed table of a sheet-fed printing machineInfo
- Publication number
- CA2034583A1 CA2034583A1 CA002034583A CA2034583A CA2034583A1 CA 2034583 A1 CA2034583 A1 CA 2034583A1 CA 002034583 A CA002034583 A CA 002034583A CA 2034583 A CA2034583 A CA 2034583A CA 2034583 A1 CA2034583 A1 CA 2034583A1
- Authority
- CA
- Canada
- Prior art keywords
- feed table
- accordance
- working position
- toothed gear
- printing unit
- 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.)
- Abandoned
Links
- 210000003746 feather Anatomy 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 101100310928 Caenorhabditis elegans sra-6 gene Proteins 0.000 description 1
- 241000353097 Molva molva Species 0.000 description 1
- 241001307279 Suteria ide Species 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001020 rhythmical effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H11/00—Feed tables
- B65H11/002—Feed tables incorporating transport belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41L—APPARATUS OR DEVICES FOR MANIFOLDING, DUPLICATING OR PRINTING FOR OFFICE OR OTHER COMMERCIAL PURPOSES; ADDRESSING MACHINES OR LIKE SERIES-PRINTING MACHINES
- B41L21/00—Devices for conveying sheets or webs of copy material through the apparatus or machines for manifolding, duplicating, or printing
- B41L21/02—Devices for conveying sheets or webs of copy material through the apparatus or machines for manifolding, duplicating, or printing for conveying sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H1/00—Supports or magazines for piles from which articles are to be separated
- B65H1/04—Supports or magazines for piles from which articles are to be separated adapted to support articles substantially horizontally, e.g. for separation from top of pile
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2801/00—Application field
- B65H2801/03—Image reproduction devices
- B65H2801/21—Industrial-size printers, e.g. rotary printing press
Abstract
A-686 09.02.1990 ru13119 Abstract The present invention relates to a feed table (2) of a sheet-fed printing machine with machine side frames (7, 8, 9, 10), over which sheets of paper are fed from a stacker (1) to a printing unit (3). The feed table (2) consists of a table top (6) held by two side parts (4, 5) as well as of revolving conveyors (20) provided with a drive and guided by means of deflection rollers (26, 27) which are supported in the side parts. For easy removal of the feed table (2) from its working position and improved accessibility to parts located in the printing unit (3) while maintaining, when the feed table (2) is returned to its working position, the neutral-phase working position of parts located on the feed table (2) and moved in accordance with the machine cycles, the feed table (2), in relation to the machine side frames (7, 8, 9, 10), is supported so that it can be laterally displaced from a working position to a rest position, so that the feed table can be laterally locked in the working position, and so that in the working position, a drive connection between the printing unit drive and the deflection rollers (26, 27) of the said feed table (2) is established.
(Figure 2)
(Figure 2)
Description
A-686 09.02.1990 rul3119 F~ed table of a sheet-fed printing machine ,~
Description The invention relates to a feed table of a sheet-fed printing machine with machine side frames, over which sheets of paper are fed from a stacker to a printing unit, consisting of a table top held ~y two side parts and also of revolving conveyors provided with a drive and guided by means of deflection rollers supported in the side parts.
The DE-PS 646 002 illustrates a feed table of a sheet-fed printing machine with machine side frames, over which sheets of paper are fed from a stacker to a printing unit, consisting of a table top held by two side parts and also of revolving conveyors provided with a drive and guided by means of deflection rollers supported in the side parts.
There are known designs of these feed tables with an upward tilting capability for reasons of accessibility to machine parts located in the printing unit. In these solutions, satisfactory accessibLlity is obtained only by dispensing as far as posæible with use of the space above the feed table, which has to be kept free for the tilting process, especially on the side of the feed table facing the printing unit.
r~
,~3~83 A-~86 09.02.1990 rul3119 A feed table of` this kind therefore represents an f~ unsatisfactory compromise between wasted design space, which is required for example for use of a satellite printing unit; and reasonably satisfactory accessibi]ity to parts located in the printing unit.
Moreover, the neutral-phase operativeness of parts located on the feed table and driven in accordance with the machine cycle, such as the front lay marks provided on the feed table, cannot be maintained during access to parts located in the printing unit, but has first to be restored.
A certain expenditure of effort is re~uired on the part of the operator to manually tilt such a table upwards.
A feed table of this kind, even in a tilted position, restricts the space in front of the printing unit which is needed for access to parts located in the printing unit if only because the table fully remains in this space. In the design of such a table, an increase~d risk of injury to operating staff must be taken into consideration.
In the case of feed tables with a tilting capability, the use of parts located on them and moved in accordance with the machine cycle, such as the front lay marks, ~resents a further problem. If the drive for these parts is effected from the printing unit side, problems of attachment and exact rhythmical movement will occur. If the drive is effected from 3f~583 A-686 09.02.1990 rul3119 the other side, additional driving gears will be required.
The task of the inventlon is to design a feed table in such a way that it can be removed simply from its working position, so that accessibility is improved and so that the working position of parts located on the feed table and moved in accordance with the machine cycle remains a neutral-phase one when this feed table position is restored.
According to the invention, the task is solved by ensuring that the feed table, in relation to the machine side frames, is laterally displaceable from a working position to a rest position and can be laterally fixed in the working position and that, when it is in the working position, a drive connection exists between the printing unit drive and the deflection rollers of the feed table.
A feed table of this kind ensures maximum accessibility to parts located in the printing unit.
The space above the feed table is not unnecessarily restrict:ed by any required tilting movements of the table. When the feed table i5 shifted, virtual,ly the entire space occupied by the feed table in its wor~cing position is available for use to access the parts located in the printing unit. If the feed table is pushed back to the working position, front lay mar]cs or other parts on the feed table which are driven in accordance with the machine cycle are immediately returned to their neutral-phase working position. The use of a feed table of this kind also permits the overlying and underlying space to be taken into account for design purposes, as appears A-686 09.02.1990 rul3119 desirable, for example, in the use of satellite printing units or duplexing printing units.
Advantages are achieved by designing the lateral displacement in such a way that an axis is fixed in the machine side frames on one side of the feed table, tha~ a holding element is provided in the machine side frame on the opposite side of the feed table, and that the feed table is mounted in a displaceable manner, in relation to the machine side frames, on the axis and the holding element.
A feed table of this kind is already manually displaceable. In the case of small printlng machines in particular, it requires no additi.onal adjusting element, which makes this table economically and also ergonomically advantageous.
If the side of the feed table facing the printing unit is selected for attaching the axis in the machine side frames, and if the feed table is fixed by means of at least two bearing points in such a way that it is displaceable on the axis and if it is supported by means of one bearing point on the holding element, then this will stabilize in particular the moved machine parts provided on the side of the feed table facing the printing unit, such as front: lay marks, and will therefore favour the maintenance of their neutral-phase working position and an especially smooth and precise paper-run in the vici.nity of the printing unit. Moreover, this mounting arrangement can be manufactured simply and at low cost. Utilization of space and therefore accessibility to machine parts located in the printing unit can be optimized by designing the ;~U3 ~S83 A-686 09.02.1990 rul3119 equipment in such a way that the length of the axis is nearly twice the breadth of the feed table, so that the feed table can be removed almost completely from the space which it occupies in a working position.
An inexpensive configuration of the lateral adjustability which is in addition simple and precise to handle is offered by using a spindle arrangement in accordance with the characteristics of <C~aim 4 !
By turning the spindle, for example manually by means of a handwheel or electrically, pneumatically or hydraulically by means of appropriate separate controlling mechanisms, the feed table can be adjusted in respect of its lateral position.
,/( The characteristics of C~laim 5)describe a low-cost, simple and secure positioni-ng ¢esign with the aid of which the feed table can be locked in its working position, thus preventing it from being inadvertently shifted, for example during the paper-run of the machine.
A particularly simple, low-cost drive connection, requiring only a few driving parts, of the deflection rollers with the printing unit drive, by which the neutral-phase working position of the driven machine parts on the feed table is not interrupted when the table is moved, is produced by the utilization of a drive connection consisting of toothed gears meshing with one another. One of these toothed gears sits on a drive shaft and another on a driven shaft while being fixed in a non-rotatable manner, whereby the toothed gear located on the drive shaft is attached in such a way as to be axially displaceable, and the '~3~583 A-686 09.02.1990 rul3119 toothed gear located on the driven shaft is attached in such a way as to be axially fixed, and an axial guide element is provided for the axially .,~
displaceable toothed gear.
The characteristics of Clalms 7) and~ 8 represent I preferred design versions of the drive connection by I means of toothed gears, of axial guidance, and of displaceability of the toothed gear fixed in an axially displaceable manner.
The design versions according to the invention are illustrated in the following by means of Figures l -8.
The figures show:
Figure 1: Overall side view of a feed table according to the invention Figure 2: Top view of the feed tabl~ in accordance with Figure 1 Figure 3: Drive diagram with top view of the feed table in accordance with Figure 1 Figure 4: Shifting mechanism of the feed table in accordance with section 4-4 of Figure 1 Figure 5: Design version of a positioning device on the axis a side view b top view ~h ~03~83 A-686 09.02.1990 rul3119 Figure 6: Design version of an adjusting device consisting of a spindle , Flgure 7: Carrylng fork for axial shifting of the toothed gear Figure ~: Printing unit arrangements for which a displaceable feed table appears to be especially suitable a satellite printing unit b duplexing printing unit Figures 1 and 2 show a sectional view of a sheet-fed printing machine with a feed table 2 via which sheets of paper 21 are fed by means of conveyor belts 20 from a stacker 1 to the printing unit 3. Machine side frames 7, 8, 9, 10 represent the supporting external walls of the sheet-fed printing machine.
The feed table 2, consisting of two side parts 4, 5 and a table top 6 supported by them, features, on the side facing the printing unit, a transverse cross arm 12, which is mounted in the upper part of the side parts 4, 5 and is attached between them, this transverse cross arm being provided with two holding elements 13, 14 directed upwards. The holding elements are each provided, above the side parts 4 and 5, with a concentric bore hole 22 aligned parallel to the table top 6 transversely to the conveying direction.
OJ1 the lower part of the feed table side 17 facing the stacker 1 there is also a transverse cross arm 15 attached between the side parts 4, 5.
X03~5~33 A-686 09.02.1990 rul3119 An axis 19 is mounted in the bore holes 22 of the holding elements 13 and 14, in an axially displaceable manner, between the machine side frames 7, 8 in the area of the printing unit a little above the sheet feed point on the side facing the feed table and aligned so that it is perpendicular to the conveying direction and parallel to the conveying plane.
On the stacker 1, on a cross arm 23 firmly fixed between the machine side frames 9 and 10, a holding element 24 has been provided below the feed table 2, on which the transverse cross arm 15 of the feed table 2 is supported on a contact point 25 in a horizontally displaceable manner.
The maximum distance from the mounting point of the axis 19 in the right machine side frame 8 to the holding element 14 nearly corresponds to the breadth of the feed table 2. The contact point 25 is located halfway along the length of the axis 19.
Thus the feed table can be shifted by nearly the whole breadth of the table.
Conveyor belts 20 pass around the table top 6 over deflection rollers 26, 27 mounted in the sido parts 4, 5.
The rotational axis of the deflection rollers 26 is designed as an driven shaft 28 with a toothed gear 29 via which, as can be seen in the drive diagram of Figure 3, the driving torque of the drive shaft 30 mounted in the machine side frames below the feed table 2 i5 transmitted with the aid of a toothed gear 31 onto the driven shaft 28 and thus onto the A-686 09.02.1990 rul3119 deflection rollers 26. The drive shaft 30 is for its part driven by ~he impression cylinder 18, mounted in the machine side frames 6 and 7, via a toothed gear ~srA6 configuration consisting for example of the toothed gears 32 and 33 in such a manner that the driven shaft 28 rotates in the direction of the impression cylinder 1~.
As can be seen in Figure 4, which shows a section 4-4 in accordance with Figure 1, whereby for clarity of illustration no account has been taken of the presentation of, for example, the table top 6, conveyor belts 20 and deflection roller 26, the drive shaft 30 is provided, between the toothed gear 33 and the left machine side frame 7 in the conveying direction, with a feather key 34, the len~th of which has been designed to be somewhat greater than the maximum shifting length of the feed table 2.
By means of the feather key 34, the toothed gear 31 is seated in an unrotatable manner and in such a way as to be axially displaceable, in the working position of the table in the vicinity of the machir.e side frame 7. On the lsft s.ide part ~ in the conveying direction of the feed table 2, a carrying fork 35 is attached towards the outside in the aperture of which the toothed gear 31 is held in a freely rotatable but axially fixed manner so that it is constantly in mesh with the toothed gear 29.
The carrying fork 31 consists, for example as illustrated in Figure 7, of two plates 36, 37 of equal dimensions which are rigidly attached to the side part of the feed table by means of two screwed ~)3~S83 ,f,~
A-686 09.02.1990 rul311g connections 38, 39 and, located between them, two distance bushings 40, 41 through which the screws of the screwed connections 38, 39 are conducted and the leng~h of which is somewhat greater than the tooth breadth of the toothed gear 31.
The two plates 36, 37 are provided with identical bore holes through which the shaft 30 passes concentrically while being freely rotatable. Between the plates 36 and 37, the toothed gear 31 is supported in a rotatable manner by means of two thrust bearings 42, 43 which are concentric to the shaft 30.
Instead of a connection featuring a feather key 34, use can also be made for example of a connection comprising a splined shaft, a polygonal profile shaft or the like.
The feed table 2 can be positioned as shown exclusively (for clarity of presentation) in Figures a and b for example. On the side of the ~ositioning device 13 facing the left machine side frame 7,, there is a firmly flanged-on internal bushing 44 which is provided with a clearance bore through which the axis 19 passes concentr:ically and with clearance, and in which the swivel head 46 of lever 45 provided for positioning is supported so that it is concentrically rotatable around the axis 19 and axially secured by a locking ring 66. Via a recess covering a section of the circumference of the bushing, the lever arm 47 of the lever 45 penetrates the bushing and can be turned around the axis 19 via the angular section provided with the recess.
~C33~LS~3 A-686 09.02.1390 rul3119 The lever head 46 is provided with a through hole which is concentric to the axis 19 and which has a circumferential profile corresponding to the profile of a larger circle cut by two diametrically opposed tangents laid on a smaller circle.
At the end of the axis 19 on the side facing the machine side frame 7, there is a firmly fixed external bushing 48, provided for positioning, which features a circumferential groove 49, the bottom diameter of which corresponds to the small circle diameter, and the width of which is somewhat greater than the width of the lever head. This circumferential groove is located near the edge of the external bushing 48 facing the feed table 2 so that there remains a narrow circumferential ridge 50 between the groo~e and the said edge.
The circumferential profile of the ridge 50 corresponds to the circumferential profile of the throuqh hole of the lever 45 so that, with the lever pointing upwards in the opened position, the two profiles are superimposed and can be passed over each other with clearance. In the zone of the groove 49, the lever 45 can be turned wltil it is stopped and the profiles of the circle through hole and the ridge 50 cross and lock.
The circumferential ridge 50 is slightly slanted towards the circumferential groove 49 in the axial direction and the dimensions at the bottom are so large that in addition, in the axial direction, an interlocking connection is obtained and therefore the feed table 2 is firmly positioned.
~33~5i83 A-~86 ~9.02.1990 rul3119 the Gutside at the right side part 5. In accordance with ~igure 3, the shaft 57 is moved via a lever 58 firmly seated on said shaft, a roller 59 supported on the lever, which roller by means of a spring not illustrated fixed on the side part 4 rests against a cam disk 61 attached to a shaft 60. The shaft 60 is supported in the side parts 4 and 5 and is provided with a toothed gear 62 on its extension through the side part 4. The toothed gear 62, via toothed gears 63, 64 which are supported in side part 4 by a toothed gear 65 attached on the driven shaft 28 of deflection rollers 29, is driven in such a manner as to run synchronously to the impression cylinder.
Figure 1 illustrates a conventional 7 o'clock printing unit arrangement consisting of impression cylinder 18, plate cylinder 54 and rubber blanket cylinder 55 supported in the machine side frames.
Figureæ 8 show printing unit arrangements in the case of which the use of a displaceable feed table 2 is particularly advantageous. Figure 8 a shows a satellite printing unit 3 with plate cylinder6 54, the rub;ber blanket cylinder 55 and the impression cylinder 18, Figure 8 b shows a double impression cylinder arran~ement with the rubber blanket cylinders 55 and the plate cylinders 54.
Description The invention relates to a feed table of a sheet-fed printing machine with machine side frames, over which sheets of paper are fed from a stacker to a printing unit, consisting of a table top held ~y two side parts and also of revolving conveyors provided with a drive and guided by means of deflection rollers supported in the side parts.
The DE-PS 646 002 illustrates a feed table of a sheet-fed printing machine with machine side frames, over which sheets of paper are fed from a stacker to a printing unit, consisting of a table top held by two side parts and also of revolving conveyors provided with a drive and guided by means of deflection rollers supported in the side parts.
There are known designs of these feed tables with an upward tilting capability for reasons of accessibility to machine parts located in the printing unit. In these solutions, satisfactory accessibLlity is obtained only by dispensing as far as posæible with use of the space above the feed table, which has to be kept free for the tilting process, especially on the side of the feed table facing the printing unit.
r~
,~3~83 A-~86 09.02.1990 rul3119 A feed table of` this kind therefore represents an f~ unsatisfactory compromise between wasted design space, which is required for example for use of a satellite printing unit; and reasonably satisfactory accessibi]ity to parts located in the printing unit.
Moreover, the neutral-phase operativeness of parts located on the feed table and driven in accordance with the machine cycle, such as the front lay marks provided on the feed table, cannot be maintained during access to parts located in the printing unit, but has first to be restored.
A certain expenditure of effort is re~uired on the part of the operator to manually tilt such a table upwards.
A feed table of this kind, even in a tilted position, restricts the space in front of the printing unit which is needed for access to parts located in the printing unit if only because the table fully remains in this space. In the design of such a table, an increase~d risk of injury to operating staff must be taken into consideration.
In the case of feed tables with a tilting capability, the use of parts located on them and moved in accordance with the machine cycle, such as the front lay marks, ~resents a further problem. If the drive for these parts is effected from the printing unit side, problems of attachment and exact rhythmical movement will occur. If the drive is effected from 3f~583 A-686 09.02.1990 rul3119 the other side, additional driving gears will be required.
The task of the inventlon is to design a feed table in such a way that it can be removed simply from its working position, so that accessibility is improved and so that the working position of parts located on the feed table and moved in accordance with the machine cycle remains a neutral-phase one when this feed table position is restored.
According to the invention, the task is solved by ensuring that the feed table, in relation to the machine side frames, is laterally displaceable from a working position to a rest position and can be laterally fixed in the working position and that, when it is in the working position, a drive connection exists between the printing unit drive and the deflection rollers of the feed table.
A feed table of this kind ensures maximum accessibility to parts located in the printing unit.
The space above the feed table is not unnecessarily restrict:ed by any required tilting movements of the table. When the feed table i5 shifted, virtual,ly the entire space occupied by the feed table in its wor~cing position is available for use to access the parts located in the printing unit. If the feed table is pushed back to the working position, front lay mar]cs or other parts on the feed table which are driven in accordance with the machine cycle are immediately returned to their neutral-phase working position. The use of a feed table of this kind also permits the overlying and underlying space to be taken into account for design purposes, as appears A-686 09.02.1990 rul3119 desirable, for example, in the use of satellite printing units or duplexing printing units.
Advantages are achieved by designing the lateral displacement in such a way that an axis is fixed in the machine side frames on one side of the feed table, tha~ a holding element is provided in the machine side frame on the opposite side of the feed table, and that the feed table is mounted in a displaceable manner, in relation to the machine side frames, on the axis and the holding element.
A feed table of this kind is already manually displaceable. In the case of small printlng machines in particular, it requires no additi.onal adjusting element, which makes this table economically and also ergonomically advantageous.
If the side of the feed table facing the printing unit is selected for attaching the axis in the machine side frames, and if the feed table is fixed by means of at least two bearing points in such a way that it is displaceable on the axis and if it is supported by means of one bearing point on the holding element, then this will stabilize in particular the moved machine parts provided on the side of the feed table facing the printing unit, such as front: lay marks, and will therefore favour the maintenance of their neutral-phase working position and an especially smooth and precise paper-run in the vici.nity of the printing unit. Moreover, this mounting arrangement can be manufactured simply and at low cost. Utilization of space and therefore accessibility to machine parts located in the printing unit can be optimized by designing the ;~U3 ~S83 A-686 09.02.1990 rul3119 equipment in such a way that the length of the axis is nearly twice the breadth of the feed table, so that the feed table can be removed almost completely from the space which it occupies in a working position.
An inexpensive configuration of the lateral adjustability which is in addition simple and precise to handle is offered by using a spindle arrangement in accordance with the characteristics of <C~aim 4 !
By turning the spindle, for example manually by means of a handwheel or electrically, pneumatically or hydraulically by means of appropriate separate controlling mechanisms, the feed table can be adjusted in respect of its lateral position.
,/( The characteristics of C~laim 5)describe a low-cost, simple and secure positioni-ng ¢esign with the aid of which the feed table can be locked in its working position, thus preventing it from being inadvertently shifted, for example during the paper-run of the machine.
A particularly simple, low-cost drive connection, requiring only a few driving parts, of the deflection rollers with the printing unit drive, by which the neutral-phase working position of the driven machine parts on the feed table is not interrupted when the table is moved, is produced by the utilization of a drive connection consisting of toothed gears meshing with one another. One of these toothed gears sits on a drive shaft and another on a driven shaft while being fixed in a non-rotatable manner, whereby the toothed gear located on the drive shaft is attached in such a way as to be axially displaceable, and the '~3~583 A-686 09.02.1990 rul3119 toothed gear located on the driven shaft is attached in such a way as to be axially fixed, and an axial guide element is provided for the axially .,~
displaceable toothed gear.
The characteristics of Clalms 7) and~ 8 represent I preferred design versions of the drive connection by I means of toothed gears, of axial guidance, and of displaceability of the toothed gear fixed in an axially displaceable manner.
The design versions according to the invention are illustrated in the following by means of Figures l -8.
The figures show:
Figure 1: Overall side view of a feed table according to the invention Figure 2: Top view of the feed tabl~ in accordance with Figure 1 Figure 3: Drive diagram with top view of the feed table in accordance with Figure 1 Figure 4: Shifting mechanism of the feed table in accordance with section 4-4 of Figure 1 Figure 5: Design version of a positioning device on the axis a side view b top view ~h ~03~83 A-686 09.02.1990 rul3119 Figure 6: Design version of an adjusting device consisting of a spindle , Flgure 7: Carrylng fork for axial shifting of the toothed gear Figure ~: Printing unit arrangements for which a displaceable feed table appears to be especially suitable a satellite printing unit b duplexing printing unit Figures 1 and 2 show a sectional view of a sheet-fed printing machine with a feed table 2 via which sheets of paper 21 are fed by means of conveyor belts 20 from a stacker 1 to the printing unit 3. Machine side frames 7, 8, 9, 10 represent the supporting external walls of the sheet-fed printing machine.
The feed table 2, consisting of two side parts 4, 5 and a table top 6 supported by them, features, on the side facing the printing unit, a transverse cross arm 12, which is mounted in the upper part of the side parts 4, 5 and is attached between them, this transverse cross arm being provided with two holding elements 13, 14 directed upwards. The holding elements are each provided, above the side parts 4 and 5, with a concentric bore hole 22 aligned parallel to the table top 6 transversely to the conveying direction.
OJ1 the lower part of the feed table side 17 facing the stacker 1 there is also a transverse cross arm 15 attached between the side parts 4, 5.
X03~5~33 A-686 09.02.1990 rul3119 An axis 19 is mounted in the bore holes 22 of the holding elements 13 and 14, in an axially displaceable manner, between the machine side frames 7, 8 in the area of the printing unit a little above the sheet feed point on the side facing the feed table and aligned so that it is perpendicular to the conveying direction and parallel to the conveying plane.
On the stacker 1, on a cross arm 23 firmly fixed between the machine side frames 9 and 10, a holding element 24 has been provided below the feed table 2, on which the transverse cross arm 15 of the feed table 2 is supported on a contact point 25 in a horizontally displaceable manner.
The maximum distance from the mounting point of the axis 19 in the right machine side frame 8 to the holding element 14 nearly corresponds to the breadth of the feed table 2. The contact point 25 is located halfway along the length of the axis 19.
Thus the feed table can be shifted by nearly the whole breadth of the table.
Conveyor belts 20 pass around the table top 6 over deflection rollers 26, 27 mounted in the sido parts 4, 5.
The rotational axis of the deflection rollers 26 is designed as an driven shaft 28 with a toothed gear 29 via which, as can be seen in the drive diagram of Figure 3, the driving torque of the drive shaft 30 mounted in the machine side frames below the feed table 2 i5 transmitted with the aid of a toothed gear 31 onto the driven shaft 28 and thus onto the A-686 09.02.1990 rul3119 deflection rollers 26. The drive shaft 30 is for its part driven by ~he impression cylinder 18, mounted in the machine side frames 6 and 7, via a toothed gear ~srA6 configuration consisting for example of the toothed gears 32 and 33 in such a manner that the driven shaft 28 rotates in the direction of the impression cylinder 1~.
As can be seen in Figure 4, which shows a section 4-4 in accordance with Figure 1, whereby for clarity of illustration no account has been taken of the presentation of, for example, the table top 6, conveyor belts 20 and deflection roller 26, the drive shaft 30 is provided, between the toothed gear 33 and the left machine side frame 7 in the conveying direction, with a feather key 34, the len~th of which has been designed to be somewhat greater than the maximum shifting length of the feed table 2.
By means of the feather key 34, the toothed gear 31 is seated in an unrotatable manner and in such a way as to be axially displaceable, in the working position of the table in the vicinity of the machir.e side frame 7. On the lsft s.ide part ~ in the conveying direction of the feed table 2, a carrying fork 35 is attached towards the outside in the aperture of which the toothed gear 31 is held in a freely rotatable but axially fixed manner so that it is constantly in mesh with the toothed gear 29.
The carrying fork 31 consists, for example as illustrated in Figure 7, of two plates 36, 37 of equal dimensions which are rigidly attached to the side part of the feed table by means of two screwed ~)3~S83 ,f,~
A-686 09.02.1990 rul311g connections 38, 39 and, located between them, two distance bushings 40, 41 through which the screws of the screwed connections 38, 39 are conducted and the leng~h of which is somewhat greater than the tooth breadth of the toothed gear 31.
The two plates 36, 37 are provided with identical bore holes through which the shaft 30 passes concentrically while being freely rotatable. Between the plates 36 and 37, the toothed gear 31 is supported in a rotatable manner by means of two thrust bearings 42, 43 which are concentric to the shaft 30.
Instead of a connection featuring a feather key 34, use can also be made for example of a connection comprising a splined shaft, a polygonal profile shaft or the like.
The feed table 2 can be positioned as shown exclusively (for clarity of presentation) in Figures a and b for example. On the side of the ~ositioning device 13 facing the left machine side frame 7,, there is a firmly flanged-on internal bushing 44 which is provided with a clearance bore through which the axis 19 passes concentr:ically and with clearance, and in which the swivel head 46 of lever 45 provided for positioning is supported so that it is concentrically rotatable around the axis 19 and axially secured by a locking ring 66. Via a recess covering a section of the circumference of the bushing, the lever arm 47 of the lever 45 penetrates the bushing and can be turned around the axis 19 via the angular section provided with the recess.
~C33~LS~3 A-686 09.02.1390 rul3119 The lever head 46 is provided with a through hole which is concentric to the axis 19 and which has a circumferential profile corresponding to the profile of a larger circle cut by two diametrically opposed tangents laid on a smaller circle.
At the end of the axis 19 on the side facing the machine side frame 7, there is a firmly fixed external bushing 48, provided for positioning, which features a circumferential groove 49, the bottom diameter of which corresponds to the small circle diameter, and the width of which is somewhat greater than the width of the lever head. This circumferential groove is located near the edge of the external bushing 48 facing the feed table 2 so that there remains a narrow circumferential ridge 50 between the groo~e and the said edge.
The circumferential profile of the ridge 50 corresponds to the circumferential profile of the throuqh hole of the lever 45 so that, with the lever pointing upwards in the opened position, the two profiles are superimposed and can be passed over each other with clearance. In the zone of the groove 49, the lever 45 can be turned wltil it is stopped and the profiles of the circle through hole and the ridge 50 cross and lock.
The circumferential ridge 50 is slightly slanted towards the circumferential groove 49 in the axial direction and the dimensions at the bottom are so large that in addition, in the axial direction, an interlocking connection is obtained and therefore the feed table 2 is firmly positioned.
~33~5i83 A-~86 ~9.02.1990 rul3119 the Gutside at the right side part 5. In accordance with ~igure 3, the shaft 57 is moved via a lever 58 firmly seated on said shaft, a roller 59 supported on the lever, which roller by means of a spring not illustrated fixed on the side part 4 rests against a cam disk 61 attached to a shaft 60. The shaft 60 is supported in the side parts 4 and 5 and is provided with a toothed gear 62 on its extension through the side part 4. The toothed gear 62, via toothed gears 63, 64 which are supported in side part 4 by a toothed gear 65 attached on the driven shaft 28 of deflection rollers 29, is driven in such a manner as to run synchronously to the impression cylinder.
Figure 1 illustrates a conventional 7 o'clock printing unit arrangement consisting of impression cylinder 18, plate cylinder 54 and rubber blanket cylinder 55 supported in the machine side frames.
Figureæ 8 show printing unit arrangements in the case of which the use of a displaceable feed table 2 is particularly advantageous. Figure 8 a shows a satellite printing unit 3 with plate cylinder6 54, the rub;ber blanket cylinder 55 and the impression cylinder 18, Figure 8 b shows a double impression cylinder arran~ement with the rubber blanket cylinders 55 and the plate cylinders 54.
Claims (8)
1. Feed table of a sheet-fed printing machine with machine side frames, over which sheets of paper are fed from a stacker to a printing unit, consisting of a table top held by two side parts as well as of revolving conveyors provided with a drive and guided by means of deflection rollers supported in the side parts, characterised by the fact - that the feed table (2), as opposed to the machine side frames (7, 8, 9, 10), is supported so as to be laterally displaceable from a working position to a rest position, - that the feed table (2) is laterally lockable in the working position and - that, in the working position, a drive connection is established between the printing unit drive and the deflection rollers (26, 27) of the feed table (2).
2. Feed table in accordance with Claim 1, characterised by the fact - that an axis (19) is attached on one size of the feed table in the machine side frames (7, 8), - that a holding element (24) is provided on the opposite side of the feed table in the machine side frames (7, 8, 9, 10) and A-686 09.02.1990 ru13119 - that the feed table (2) is supported on the axis (19) and on the hold element (24) in such a way as to be displaceable with regard to the machine side frames (7, 8, 9, 10).
3. Feed table in accordance with Claim 2, characterised by the fact - that the axis (19) is fixed in the machine side frames (7, 8) on the side of the feed table (16) facing the printing unit and that its length is nearly twice the breadth of the feed table (2), - that the feed table (2) is mounted on the axis (19) via at least two bearing points in such a way as to be displaceable and - that it rests on the holding element (24) on one bearing point (25).
4. Feed table in accordance with Claims 1 or 2, characterised by the fact - that spindle bearing points are provided on the machine side frames (7, 8), - that a spindle (51) is provided, this spindle being firmly supported axially in the spindle bearing point in such a way as to be rotatable and A-686 09.02.1990 ru13119 - that a spindle casing (52) around the spindle (51) is provided, this casing being attached to a side part (4) of the feed table (2).
5. Feed table in accordance with Claim 2 or in accordance with Claims 2 and 4, characterised by the fact - that the feed table (2) is lockable in a working position by means of a lever (45) and a grooved bushing (48), - that the lever (45) is attached to the feed table (2) and - that the grooved bushing (48) is fixed on the axis (19).
6. Feed table in accordance with Claim 1, characterised by the fact - that the drive connection consists of intermeshing toothed gears (29, 31), one of which is seated on a drive shaft (30) and another one of which is seated on a driven shaft (28) in a non-rotatable manner, A-686 09.02.1990 ru13119 - that the toothed gear (31) located on the drive shaft (30) is attached in such a way as to be axially displaceable, - that the toothed gear (29) located on the driven shaft (28) is attached in such a way as to be axially fixed and - that a device for axial guidance of the axially displaceable toothed gear (31) is provided.
7. Feed table in accordance with Claim 6, characterised by the fact - that the drive shaft (30) is supported in the machine side frames (7, 8) and - that the driven shaft (28) is supported in the side parts (4, 5) facing the printing unit(l6) of the feed table (2).
8. Feed table in accordance with Claim 7, characterised by the fact - that two plates of equal dimentions (36, 37) are screwed to a side frame (4) of the feed table (2) with distance bushings (40, 41) used in such a way that the distance between them is somewhat larger than the tooth breadth of the displaceable toothed gear (31), A-686 09.02.1990 ru13119 - that the plates (36, 37) are provided with a concentric bore through which the drive shaft (30) passes in a freely rotatable manner, - that displaceable toothed gear (31) is positioned on the drive shaft (30) so that it turns between the two plates (36, 37) jointly with the drive shaft (30), - that thrust bearings (42, 43) are provided between the plates (36, 37) and toothed gear (31), and that consequently the toothed gear (31) is axially moved when the feed table (2) is displaced and - that the axial displaceability is achieved by means of a feather key connection (34) between the drive shaft (30) and the toothed gear (31).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4004351A DE4004351C2 (en) | 1990-02-13 | 1990-02-13 | Feed table of a sheet printing machine |
| DEP4004351.7 | 1990-02-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2034583A1 true CA2034583A1 (en) | 1991-08-14 |
Family
ID=6400020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002034583A Abandoned CA2034583A1 (en) | 1990-02-13 | 1991-01-18 | Feed table of a sheet-fed printing machine |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5149081A (en) |
| JP (1) | JPH04214350A (en) |
| CA (1) | CA2034583A1 (en) |
| DE (1) | DE4004351C2 (en) |
| FR (1) | FR2658176A1 (en) |
| GB (1) | GB2240771B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5253863A (en) * | 1992-11-23 | 1993-10-19 | Pitney Bowes Inc. | Portable sheet feeding apparatus |
| DE4243486C1 (en) * | 1992-12-22 | 1994-04-07 | Heidelberger Druckmasch Ag | Setting table for sheet-fed printing press - has preasembled unit of frame with rollers and belt, to move sheets |
| FR2705953B1 (en) * | 1993-06-02 | 1995-08-04 | Bourg Sa Cp | Device for transferring bundles of sheets from a printing or copying machine to a finishing machine. |
| DE19623563C1 (en) * | 1996-06-13 | 1997-10-09 | Heidelberger Druckmasch Ag | Printer with printing units and continuous conveyor belt |
| US6273412B1 (en) * | 1999-12-29 | 2001-08-14 | Pitney Bowes Inc. | Lower envelope transport mounting and adjusting apparatus |
| US7416073B1 (en) * | 2007-02-09 | 2008-08-26 | Geo. M. Martin Company | Diverting flat belt support system |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1075637B (en) * | 1960-02-18 | Miller Printing Machinery Co , Pittsburgh Pa (V St A) | Sheet feed table for printing presses | |
| DE138183C (en) * | 1901-08-14 | 1903-01-23 | Device for pressing and repacking cigars | |
| DE646002C (en) * | 1934-04-07 | 1937-06-08 | Kleim & Ungerer | Device for feeding the sheets of paper, cardboard or the like separated from a stack via a feed table to printing machines, folding machines or the like. |
| DE1028588B (en) * | 1954-04-08 | 1958-04-24 | Headley Townsend Backhouse | Machine for separating and conveying sheets from the top of a pile |
| GB1033404A (en) * | 1963-04-01 | 1966-06-22 | Leipziger Buchbindereimaschine | Improvements in or relating to book-binding |
| US3860232A (en) * | 1971-07-08 | 1975-01-14 | Merrill David Martin | Adjustable stacker layboy |
| DE2420165C3 (en) * | 1974-04-25 | 1981-05-14 | Pitney Bowes Deutschland Gmbh, 6148 Heppenheim | Paper transport device |
| DE2423248A1 (en) * | 1974-05-14 | 1975-11-20 | Mabeg Maschinenbau Gmbh Nachf | Printing machine feed table - has lengthwise tubes on upper surface and of non-conductive material |
| JPS5364883A (en) * | 1976-11-19 | 1978-06-09 | Seiko Seiki Kk | Pallet conveying machine for transfer machine |
| DE3108806C2 (en) * | 1981-03-07 | 1984-12-20 | M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach | Sheet-fed rotary offset printing machine for either face or face printing |
| GB8715481D0 (en) * | 1987-07-01 | 1987-08-05 | Xerox Corp | Electrostatographic machine |
| KR920003243B1 (en) * | 1987-12-19 | 1992-04-25 | 산요덴끼 가부시끼가이샤 | Paper supply stand |
-
1990
- 1990-02-13 DE DE4004351A patent/DE4004351C2/en not_active Expired - Fee Related
-
1991
- 1991-01-10 GB GB9100513A patent/GB2240771B/en not_active Expired - Fee Related
- 1991-01-18 CA CA002034583A patent/CA2034583A1/en not_active Abandoned
- 1991-02-11 FR FR9101531A patent/FR2658176A1/en not_active Withdrawn
- 1991-02-12 JP JP3018792A patent/JPH04214350A/en active Pending
- 1991-02-13 US US07/655,160 patent/US5149081A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| GB2240771A (en) | 1991-08-14 |
| DE4004351A1 (en) | 1991-08-14 |
| US5149081A (en) | 1992-09-22 |
| GB9100513D0 (en) | 1991-02-20 |
| FR2658176A1 (en) | 1991-08-16 |
| JPH04214350A (en) | 1992-08-05 |
| DE4004351C2 (en) | 1996-05-23 |
| GB2240771B (en) | 1994-01-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |