US 3730236 A
An apparatus for accurately and concurrently routing recesses in both doors and associated door jambs to receive hinges of different sizes. The apparatus automatically follows a templet device which can be readily adjusted to form recesses for different size hinges.
Claims available in
Description (OCR text may contain errors)
O v Umted States Patent 1 1 0, Frydenberg 51 May I; 1973 APPARATUS FOR ROUTING RECESSES  References Cited IN DOORS AND THE LIKE UNITED STATES PATENTS  Inventor: Donald V. Frydenberg, Arlington, o
2,734,428 2/1956 Onsrud ..90/l 5 2,629,937 3/1953 Tubbs ....l44/27 Assigneer Clary Corporation, San Gabriel, 3,297,065 1/1967 Zenner..... ..144 27 Calif- 3,495,636 2/1970 Smith ..144/i44 R  Filed: May 3, 1971 Primary ExaminerDonald R. Schran  Appl' l39730 Attorney--Fred N. Schwend  U.S. Cl. ..l44/27, 144/144 R, 90/13 R,  ABSTRACT 90 62 R  Int Cl 5 /02 An apparatus for accurately and concurrently routing  mid o'f's r'a;11111:1131jiiiijjizzmza R 144.6 oo oooh ooooo ooo oooo jooooo o receive hinges of different sizes. The apparatus automatically follows a templet device which can be readily adjusted to form recesses for different size hinges.
9 Claims, 10 Drawing Figures Patented May 1, 1973 5 Sheets-Sheet 1 INVENTOR. 00/VALD l/. fQYOf/VBEQG BYX/Z ATTO/Q/VfY.
Patented May 1, 19.73
5 Sheets-Sheet 2 Patented May 1, 1973 5 Sheets-Sheet I5 Patented May 1, 1973 5 Sheets-Sheet 4 Patented May I, 1973 3,730,236
5 Sheets-Sheet 5 APPARATUS FOR ROUTING RECESSES IN DOORS AND THE LIKE BACKGROUND OF THE INVENTION 1. Field of Invention This invention relates to an apparatus for automatically recessing doors and cooperating door jambs to receive hinges.
2. Description of Prior Art Apparatus of the above type have been proposed and used heretofore wherein one or more routers are located over one edge of a door and are manually moved in a path confined by a suitable guide templet to form one or more hinge recesses. By replacing the templet with another having a different size or shape guide surface, recesses for different size or shape hinges may be formed.
Other apparatus have been proposed in which the hinge recess routers are moved automatically to route hinge recesses. Such apparatus generally include replaceable cams or variable throw devices which are interchanged or adjusted to the particular intended size of each set of hinges to be used. Although such apparatus are generally satisfactory they are relatively expensive. Also, they require considerable down time in order to replace the cams or to adjust the parts to change the paths of the routers in accordance with different size hinges to be used.
-justment of the apparatus to cut different sizes and shapesof hinge recesses.
SUMMARY OF THE INVENTION A principle object of the present invention is to pro vide an improved apparatus for automatically. routing hinge recesses in doors and associated door jambs.
Another object is to provide an improved automatic templet following device.
Another object is to provide an apparatus of the above type capable of quick and readyadjustment to route hinge recesses of different sizes and shapes.
Another object is to concurrently route the hinge recesses for a door and associated door jamb.
Another object is to provide an apparatus of the above type in which a relatively unskilled workman can control to cut hinge recesses for doors and door jambs with a high degree of accuracy.
The invention comprises a templet follower operatively connected to one or more hinge recess routers. Guide means is provided to guide the routers in different directions and drive means yieldably drives such guide means to cause its follower to follow a pair of templets having coordinate guide surfaces arranged to cause the routers to route hinge recesses of the desired size and shape. By adjusting the templets to different relative positions whereby to place different guide surfaces in cooperative relation to the follower, the follower is caused to move in different paths, causing the routers to cut recesses of different sizes and shapes.
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a front view, partly in section, illustrating the upper portion of a door and door jamb hinge recessing machine, embodying a preferred form of the present invention.
FIG. 2 is an enlarged transverse sectional view taken substantially along the line 2-2 of FIG. 1.
FIG. 3 is a front sectional view "illustrating part of the lower portion of the machine and is taken substantially along the line 3-3 of FIG. 4.
FIG. 4 is a sectional plan view taken along the line 4--4 of FIG. 3.
FIG. 5 is a front view, with parts broken away, of part of the lower portion of the machine.
FIG. 6 is an enlarged fragmentary view illustrating different size hinge recesses formed in a door and its associated door jamb.
FIG. 7 is a sectional view taken along line.7-7 of FIG. 6.
FIG. 8 is a front view of the vertical templet.
FIG. 9 is a front view of the horizontal templet.
FIG. 10 is a schematic diagram of the motor controls.
DESCRIPTION OF THE PREFERRED EMBODIMENT Generally, a door and its associated door jamb are similarly recessed to receive the opposite wings of several hinges, such recesses being formed to a depth equal to the thickness of the hinge wings. FIGS. 6 and 7 illustrate part of a door 11 and associated door jamb 12 with hinge recesses 13 and 14, respectively, cut therein.
In forming the hinge recesses in accordance with the present invention, the door and door jamb are held in spaced apart relation as shown in FIG. 6. A rotating cutter diagrammatically indicated at 15 is initially located between door and door jamb and is caused to follow along a closed rectangular loop path, i.e. a, the cutter being of such a diameter as to cut the recesses in one complete circuit of the path. In the case of a door of greater thickness, as indicated at 11a, hinges of a larger size are preferably employed, requiring larger recesses such as indicated by the lines 115 to be routed. Templets having guide surfaces thereon, are provided to guide the cutter. By adjusting the templets to different relative positions whereby to place different guide surfaces in cooperative relation to the follower, the follower is caused to move in different paths, causing the cutter to cut recesses of different sizes and for forming the above noted hinge recesses comprises a pair of spaced-vertical columns 17 and 18 which form part of the machine frame. Included in the frame work are a pair of spaced horizontal tubular table members 20 and 21 extending the length of the machine and effective to support a door blank 11 thereon. The door blank is fed endwise into proper position against a suitable stop 19 by a pair of endless conveyor belts 22 and 23 which normally support the door blank slightly above the upper surfaces of the members 20 and 21 in a position not shown. For this purpose, the conveyor belts ride over guides 24 held in elevated positions by compression springs 25 mounted. in channel members 129 attached to the members 20 and 21. when a door blank reaches its proper position, suitable clamping means including pneumatic cylinders, one of which is shown at 29, force the door blank down against the upper surfaces of the members 20 and 21.
Other clamping means, not shown, move the member 20 and a back support 26 attached thereto toward the member 21 and spaced upright posts 27 to hold the door blank edgewise and to insure that the righthand edge of the door blank rests directly against the posts 27.
Means are provided to hold the door jamb 12, with a stop strip 28 attached thereto, against the same sides of the posts 27 as the door blank 11 is held. Initially, be fore the clamping operation, the door jamb is inserted between the posts 27 and leaf springs 30 supported by plate members 31 which are held in spaced relation to the posts 27 by spacers 132. The stop strip 28 is caused to rest on the tops of the posts, thereby spacing the door jamb in relation to the door blank as shown in FIG. 6. The door jamb is also located against a suitable end stop 119.
Subsequently, during the clamping operation, the door jamb is clamped to the sides of the posts 27 by clamping devices 32. Such devices each comprises a wedge disc 33 pivotally supported at 34 and rocked clockwise about such pivotal support by air cylinder 35.
Three rotary cutters are provided as shown in FIG. 1 and are spaced apart distances equal to the desired spacing of the hinges. Such cutters are driven by router motors 37 mounted on respective crossbeams 38, FIG. 2, which in turn, are mounted on a channel shaped crosshead or carriers 40 extending substantially the length of the machine.
The cutters 15 are adjustable relative to each other to change the spacing between the hinge recesses and for this purpose each crossbeam 38 has a pair of spaced posts 41 thereon terminating in T-slot's 42. Clamps screws 43 extend through the cross head 40, through inwardly turned ends of the posts 41, and threadably engage nuts 44 fitted within the slots 42. By releasing the clamp screws 43 the cross beams 38 and consequently the cutters 15 may be adjusted lengthwise of the cross head. Also, one or more cutters may be readily removed by releasing the clamp screws in the event, for example, it is desired to use only two hinges per door.
The cutters 15 are located such that their lefthand cutting edges, as viewed in FIG. 2, are spaced from the lefthand edges of the posts 27 by amounts equal to the thickness of the wings of the hinges to be used and the cross head 40 is thereafter moved in a vertical plane, in accordance with the present invention, by a templet follower to be described later so as to cut the hinge recesses 13 and 14.
In order to guide the cross head through a parallel motion, slide bearing devices generally indicated at 46 and 47 are provided in the columns 17 and 18, respectively. Such devices each comprises a bearing block 48 slideably mounted for vertical movement on a vertical post 50 supported at its ends by brackets 51 mounted in the respective column, i.e. 18. The bearing block 48 has horizontal bearings formed therein to slideably receive a pair of rods 52 extending from and attached to the respective end of the cross head 40.
Describing now the templet follower for moving the crosshead 40 and cutters 15 in a vertical plane, the follower is shown particularly in FIGS. 3, 4, and 5 and comprises a pair of vertical rods 53 secured at their upper ends to the cross head 40 and at their lower ends to end flanges 54 and 55 of a channel member 56.
A bearing block 57 is slideably mounted for relative vertical movement on the rods 53 and is urged towards its central illustrated position relative to the channel member 56 by two pairs of compression springs 58 and 59 surrounding the rods and interposed between the bearing block and end flanges 54 and 55. The bearing block 57 has horizontal bearings which slideably receive a pair of horizontal rods 60 which are secured to the end flanges 61 and 62 of a second channel member 63. The bearing block 57 is urged toward a central position, not shown, relative to the flanges 61 and 62 by pairs of compression springs 64 and 65 which surround rods 60 and are interposed between the bearing block and respective ones of the end flanges.
The channel member 63 is guided for parallel bodily movement in different directions in a vertical plane by bearing members 66 and 67 slideably mounted on vertical rods 68 secured at their top and bottom ends to frame members 170 and 171. The bearing members 66 and 67 have horizontal bearings which slideably receive the horizontal rods 60.
Drive means is provided for bodily moving the channel member 63 in a circular orbit and for this purpose a motor 70 and a suitable speed reducing unit 71 is provided, the latter being effective to rotate a crank disc 72 about an output shaft 73. The crank disc is pivotally connected at 74 to the channel member 63 to move the latter in a circular orbit but both it and rods 60 will be held horizontally disposed by the slide members 66 and 67. Such orbital movement is yieldably transferred through the springs 64 and 65, bearing block 57 and springs 58 and 59 to the channel member 56 which is constrained to follow guide surfaces formed in pair of templet members 75 and 76 through a roller 77 rotatably mounted on the channel member 56 and to thus transfer this controlled movement to the cross head 40. The vertical templet member 75, FIGS. 4,5, and 8, has an opening therein defined partly by spaced vertical sets of guide surfaces 78 and 80. Such templet member is slideably mounted for vertical movement in guide ways 81 and 82 suitably secured to frame members 83 and 84, respectively. Templet member 75 is connected at 85 to the piston rod of an air cylinder 86 attached at 89 to frame member 170 whereby the templet member may be moved from its illustrated lower position shown in FIG. 5, wherein the guide surfaces 78 thereof are engageable by the roller 77, to an upper position, not shown, wherein the guide surfaces 80 thereof are engageable by the roller 77.
The templet member 76 also has an opening therein defined partly by three sets of parallel horizontally extending guide surfaces 87, 88, and 90. Templet member 76 is slideably mounted for horizontal movement in guideways 91 and 92 secured to frame members 93 and 94, respectively. Templet member 76 is connected at 95 to the piston of an air cylinder 96, FIG.
4, which is, in turn, attached to the end of a second air cylinder 97 whose piston rod is attached at 98 to frame member 100. Accordingly, when the pistons of both 76 is held in its position illustrated in FIGS. 4 and 5' wherein the guide surfaces 87 are effective to guide the roller 77, and therefore the cross head 40, horizontally.
When the piston of cylinder 96 is extended, the templet member 76 will be moved to an intermediate position wherein the guide surfaces 88 will be effective to guide the roller 77 horizontally. When the pistons of both cylinders 96 and 97 are extended, the templet member 76 will be moved to its extreme lefthand position where the guide surfaces 90 will be effective to guide the roller 77 horizontally.
Suitable valve means not shown are provided to selectively control the air cylinders 86, 96, and 97 to set the templet members 75 and 76 in different combinations of positions as will appear presently.
Normally, wooden doors are manufactured in two different thicknesses, one being 1 inches thick, as illustrated at 11 in FIGS. 6 and 7 and the other being 1 Y4 inches thick, as illustrated at 11a. Although the same size door jamb is generally employed, the stop strip 28 is generally so located thereon that the dimension a will be the same as the thickness of the door.
In order to support the door jamb in the machine with the lower edge 12a thereof at the same height above the upper surface of the door blank 11 when routing the hinge recesses for doors of the above noted different thicknesses, the posts 27 may be moved verti cally between their full line positions shown in FIG. 2 and their dotted line positions 27a. For this purpose, the posts are guided for vertical movement in suitable slide bearings, not shown, and are attached to the piston rods of air cylinders 120 suitably attached to the machine frame work. By extending the cylinders 120 the postsmay be moved to their upper positions 27a.
In operating the machine, the various clamping devices are actuated in desired sequence. Suitable well known control valve and sequencing mechanisms, such as that disclosed in the US. Pat. No. 3,331,410 to 6.0. Mayo, may be employed.
Different ones of the cylinders 86, 96, and 97 are selectively actuated to appropriately position the templet members 75 and 76 in accordance with the size of the hinges to be used. Thereafter, the motor 70 is energized to complete one cycle of the templet follower device, i.e. one revolution of the crank disc 72. For this purpose, the circuit of motor 70, FIG. 10, is connected in series with a normally open switch 101 across a source of electric power 103. A normally open push button switch 102 is connected in parallel with the switch 101. Upon closing the switch 102 the motor operation is initiated to rotate the disc 72 whereupon a camming formation 104 in the disc closes the switch 101, maintaining the motor energized until the disc 72 has made one complete revolution.
In routing the hinge recesses for thicker doors, i.e. 113, using a cutter 15 of the diameter illustrated, the cutter, in following the closed path b, leaves uncut strips 122 and 123 on the door jamb and door, respectively. In this case, after one cycle of the machine the cylinders 96 and 97 are extended to locate the guide surfaces 90 of the templet member 76 in controlling relation to the roller 77 and a second cycle of the templet follower device is initiated. In this case, the roller will be constrained to follow a new path c wherein the cutter 15 will traverse the strips 122 and In order to route hinge recesses of sizes or shapes other than those disclosed, templet members having appropriately shaped guide surfaces may be readily substituted for the templet member and 76. Such guide surfaces may be curvedv or otherwise shaped depending upon the size and shape of the hinges to be used. Also, the radius r of the recesses may be changed as desired by substituting a cutter of appropriate diameter for the cutter 15. The sizes of the recesses may also be varied by substituting rollers ofdifferent diameters for the roller 77.
Obviously, the machine, with necessary modifications, may be used to cut recesses or openings in other items.
1. In a woodworking machine, the combination comprising means for supporting a workpiece,
a cutter for said workpiece,
templet means comprising guide surfaces forming an enclosed opening;
a follower movable along said guide surfaces,
a carrier for said cutter operatively connected to said follower for bodily moving said cutter,
drive means movable in an invariable orbital path,
spring means intermediate said. drive means and said carrier urging said carrier toward a predetermined position relative to said drive means whereby to maintain said follower in engagement with said guide surfaces during movement of said drive means in said orbital path, and
' means for maintaining said carrier in parallel positions through-out said movement thereof.
2. The combination according to claim 1 wherein said drive means moves in a complete circular path and said opening forms a non-circular guide surface.
3. The combination according to claim 1 wherein said templet means comprises a pair of templets each having opposed guide surfaces, the guide surfaces of one of said templets complementing the guide surfaces of the other of said templets to form said opening,
means for setting said templets orthogonally relative to each other to change the shape of said opening.
4. The combination according to claim 3 wherein said opposed guide surfaces of each of said templets are spaced apart different amounts in different locations along the length thereof.
5. In a woodworking machine, the combination comprising means for supporting a workpiece,
a cutter for said workpiece,
templet means having guide surfaces thereon, follower means movable along said guide surfaces, a carrier for said cutter operatively connected to said followed means for bodily moving said cutter,
a first guide means for guiding said carrier in a first direction,
a second guide means for guiding said first guide means in a second direction orthogonal to said first direction,
drive means for bodily moving said second guide means in an orbital path, and
spring means intermediate said first and second guide means and intermediate said first guide means and said carrier urging said carrier toward a predetermined position relative to said drive means whereby to maintain said follower means in engagement with said guide surfaces during movement of said drive means in said orbital path.
6. The combination according to claim wherein said spring means comprises a first spring stressed between said carrier and said first guide means and a second spring stressed between said first guide means and said second guide means.
7. The combination according to claim 3 wherein one of said templets comprises a pair of spaced parallel ones of said guide surfaces and the other of said templets comprises a second pair of spaced parallel ones of said guide surfaces,
said second pair being orthogonal to said first pair.
8. The combination according to claim 7 wherein said one templet comprises two sets of pairs of spaced parallel guide surfaces and means for selectively setting said last mentioned templet to locate either of said sets of guide surfaces in co-operative relation to said follower.
9. In a woodworking machine,
the combination comprising means for supporting a workpiece,
a rotatable cutter for said work piece,
templet means forming an opening comprising a guide surface;
a first carriage supporting said cutter for bodily movement,
a follower carried by said first carriage and moveable along said guide surface,
a second carriage supporting said first carriage for movement in a first path,
a third carriage supporting said second carriage for movement in a second path orthogonal to said first path,
means for bodily moving said third carriage in an or-' bital path, and yieldable means intermediate said first and second carriages and intermediate said second and third carriages for causing said follower to follow said guide surface during movement of said third carriage in said orbital path.