US1708314A - Wire-stitching machine - Google Patents

Description

AP 9 E. LESCHHORN WIRE STITCHING MACHINE Filed Sept. 4, 1925 5 Sheets-Sheet April 1929- E. LESCHHORN WIRE STITCHING MACHINE Filed Sept. 4, 1925 5 Sheets-Sheet April 9, 19290 sc g m 1 7@8,314

WIRE STITCHING MACHINE Filed Sept. 4, 1923 5 Sheets-Sheet 5 April 9, 1929, E, LESCHHORN 1,708,314

WIRE STITCHING MACHINE Filed Sept. 4-, 1923 5 Sheets-Sheet 4 April 9, 1929. E. LESCHHORN WIRE STITCHING MACHINE F iled Sept. 4, 1925 5 Sheets-Sheet Patented Apr. 9, 1929. I

UNITED STATES PATENT, OFFICE.

ERNEST LESCHHORN, OF CHICAGO, ILLINOIS, .A SSIGNOR TO LATHAH MACHINERY COMPANY, A CQRPORATIQN OF ILLINOIS.

WIRE-STITCHIN G MACHINE.

Application filed September 4, 1923. Serial No. 660,788.

This invention relates to a wire stitching machine and more particularly to the feeding and cutting mechanism thereof.

One of the objects of the present invention is to provide a stitching machine of simple construction and at the same time increase the efficiency of the same.

A further object of the invention 1s to provide a novel and simple means for adjusting the feeding and cuttingmeehanlsm by means of which the machine can be quickly adjusted to stltch various sized staples.

A still further object of the invention is to provide a novel form of cutting mechanism by means of which the knife is always actuated through the .same cut-ting movement by the actuating mechanism regardless of its position of adjustment.

These and other objects are obtained by providing a construction and arrangement of the various parts in the manner herein after described and particularly pointed out in the appended claims.

Referring to the drawings:

Fig. 1 is a front elevational View of a wire stitching machine showing my improvement embodied therein.

' Fig. 2 is an enlarged cross sectional view taken on lines 2-2 of Fig. 1.

Fig. 3 is an enlarged detail top plan view of my improved feeding mechanism showing the train of gears for operatively driving the same.

Fig. 4 is an enlarged cross sectional view taken on the lines 4-4 of Fig. 1.

Fig. 5 is an enlarged cross sectional view taken on the lines 5-5 of Fig. 1, showing the manner'in which my improved cutting mechanism is adjustahly mounted on the frame of the machine.

Fig. 6 is an enlarged cross sectional view taken on the line 66 of Fig. 1.

Fig. 7 is an enlarged fragmentary front elcvational View of the cutting mechanism.

Fig. 8 is a rear elevational view of the cutting mechanism shown in Fig. 7. v

Fig. 9 is a cross sectional view of the cutter box taken on the lines 9-9 in Fig. 7

60 Fig. 10 is a cross sectional View taken on the lines.1010 in Fig. 8.

Fig. 11 is an enlarged cross sectional view taken on the lines 11-11 of Fig. 1.

Fig. 12 is an enlarged cross sectional view taken on the lines 1212 of Fig. 1 and looking in the direction of the arrows indicated, and

Fig. 13 is an enlarged side elevational View, taken on the lines 13-13 of Fig. 1 and looking in the direction of the arrows, of the wire cheek and straightening device.

The present invention is applied to wire stitching machines of the general character well known in the art and only that portion of the machine is shown in the drawings to sufliciently illustrate the present invention and its relative parts. The whole stitching mechanism, which constitutes the head, is supported on a horizontally dis osed arm 15, which rotatably supports a s aft 16 in a horizontal bore 17 of the. arm. Secured to the forward end of the arm 15 is a vertically disposed fplate 18 upon which the operative parts 0 the stitcher are mounted. A reduced portion-of the shaft 16, indicated at 19, extends from the plate 18 and has secured thereto by means of a key, not shown, an operating cani 20. The cam 20 is prevented from displacement on the reduced portion 19 of the shaft 16 by means of a washer and screw 21. Securely mounted in any -well known manner on a collar 22 formed integrally with the cam 20 is a spur gear 23, as clearly shown in Fig. 2. The lower portion of the plate 18 has secured thereto by means of pins 24, a block 25. The block 25 is provided with a vertically extending groove or recessed ortion 26 on its front side through which t e staple former 27 is mounted for vertical slidin movement. The forward or front side of the staple former 27 is provided with a vertically extending channel or groove 28, which is adapted to reciprocally receive a staple driver 29. Both the staple former and driver are operatively reciproeated in their respective channels or grooves by the cam 20. The staple former 27 is connected to the cam by a roller 30 at its upper end, which operates in a cam groove 31 formed in the cam, and the driver 29 is operatively connected to the cam by means of a pitman connection 32 having one end thereof connected to the upper end of the driver and the other end thereof pivotally connected eccentrically to the cam 20. 'Extending through apertures 33 and 34 formed in the lower ends of the block 25 and the plate 18, respectively, is the usual anvil 35 mounted in a socket 36, which is secured in the said apertures 33 and 34 by a set screw 37. The anvil 35 is normally actuated to the position shown in Fig. 2 by a compression spring 38 which has one end thereof engaging a shoulder 39 of the anvil 35 and the other end thereof enga ing the base of the socket 36. The forwar end of the anvil is provided with the usual horizontally disposed slot 40 which is adapted to receive the wire and hold the same during the time the staple is being formed b the sta le former. Pivoted forwardly o the anvil 35 is the usual staple supporter 41 pivoted at 42-to a hanger 43. The supporter 41 is adapted to extend between'the legs of the staples while they are being driven. The supporter 41 is normally held in the position shown in Fig. 2 by a vertically reciprocable pin 44 mounted in a socket 45 and normally pressed downwardly by a compression spring 46.

The mechanism thus far described is the usual mechanism employed in this type of stitching machine, and per se does not form any part of the present invention.

or this reason a more detailed description of the same is unnecessary.

The principal feature of the present invention is'the provision of an improved cutting mechanism which is adapted to be adjusted by a thumb screw in such a manner as to cut wires of different lengths when the feeding mechanism is correspondingly adjustd to feed wires of a proper correspondin 'len h. This mechanism comprises an ad usta le cutter box 47, which includes a block 48 having a rearwardly projecting portion 49 adapted to slidably engage a horizontally extending recess 50 formed on the forward side of the block 25. The block 48 is provided with a threaded aperture 47 which is adapted to receive a bolt 48 for permanently securing the box against relative horizontal adjustment when the proper adjustment of this cutter box has been determined. This bolt 48 extends through a slotted aperture 49 of the plate 18 and block 25. It will, of course, be understood that when the cutter box is to be adjusted horizontally this bolt 48 must be loosened so as to permit this adjustment. The cutter box 47 is adjustably mounted in the groove 50 by meanssof a threaded screw 51. The threaded screw 51 connects the adjustable cutter box 47 by having threaded engagement therewith, as shown at 52. The end of the screw 51 oppositethe threaded end thereof extends through a horizontally disposed aperturez53 .inlthe block 25, as clearly shown in Figs. 2 and 6. The externally.

projecting portion of the threaded screw has securely fixed thereto by means of a pin 54 a thumb engaging portion 55. The screw 51 is normall ,e d against displacement from the bloc 25 by a' collar 56' formed integrally with the screw 51.

From this construction it will be seen that as the screw 51 is turned through the medium of the thumb engaging portion 55, the cutter box 47 may be horizontally adjustedto and from the staple forming and driving mechanism.

, Secured to the block 48 by means of a shoulder 57 of a screw bolt 65 is a second block 58; Secured to the block .58 by means of a screw 59 is a wire tube support 60. Removably' secured in the support 60 by means of a set screw 63 is a wire guide tube 60'. Positioned on the front face of the cutter block is a plate 61 secured in position by a screw 62 and having an aperture 62 embracing the head of the bolt 65. Reciprocally mounted between the plate 61. and .the second block 58 is a knife-carrying member 63. The knife carrying member 63 is provided with a slotted aperture 64 which slidably engages an'enlarged portion 57 of the screw 65. The knife carrying member 63 isfurther provided with a pin 67 secured thereto in any well known manner ,and having its forward edge extending forwardly and adapted to reciprocate in' a slot 68 formed in the plate 61. This pin normally engages the upper portion of the slot and limits the upward movement of the reciprocating knife car ing member 63 in its nor-v mal operation. cent the staple former is a reversible kmfe 69 which is slightly bevelled at both ends thereof, as shown at 70, in such a manner as to present a good cutting'edge. This knife 69 is provided with, on one side thereof and intermediate its ends, a projecting portion 71, which is adapted to engage in a horizontal channel 72 formed 'on'the side of the knife carrying member 63 adjacent the staple forming and driving mechanism. The projection 71 of the knife 69 is secured in the channel 72 of the member 63 --by means of a screw 73. By this construction, it will be seen that the knife is securely held in its position so as to insure its eflicient operation.

From this construction'it will be seen that as soon as one edge of the cutter knife 69 ounted on the side adjaknife carrying member 63 is guided in its vertical reciproc'atory movement by a tubular member 76 secured to abearing late 77, which, in turn, is secured to the kni e carrying member 63 by means of screws 78. By this construction, it will be seen that the tubular member embraces the spring 74 and has its outer wall slidably engaging the bore 75 of the block 58 in a manner to insure absolute vertical reciprocation of the knife carrying member and also to prevent the possibility of the knife cutting the wire at an angle by reason of wear in these reciprocating parts. In order to further insure the absolute vertical reciprocation of the knife and the carrying member, it will be seen by referring to Figs. 6 and 11 that the knife carrying member is provided with a channel 79 extending vertically throughout the length of this member and engageable with a corresponding projection 80 formed on the forward side of the block 58.

In connection with my improved wire cutting mechanism I'have provided a novel adjustable feeding mechanism by means of which the lengths of wire fed may be varied with the least possible effort on the part-of the operator. This improved mechanism comprises feeding. rolls or discs 81 and 82, respectively, which are operatively driven through a train of gears 83, 84 and 85, the first of these gears 83, of course, being operatively driven by thegear 23 secured to the operating cam 20. The gears 83 and 84 are pivotally supported on the studs 87 and 88 secured to the plate 18 of the head of the stilt-her. The roller 81 is operatively driven by the gear Set and is secured thereto by a .collar 89 extending from the gear to the feed disc or roller 81. The feed roller or disc 82 is pivotally mounted in a bracket 90, which, in turn, is pivotally secured to the plate 18 by means of a stud screw 91. The feed roller or disc 82 is resiliently pressed against its corresponding feed disc or roller 81 through a compression spring 92, which normally engages the free end 93 of the pivoted bracket 90. The tension on the spring 92 may be adjusted by a thumb nut 94, which is threaded to a pivoted bolt 95, which, in turn, is secured to a boss 96 formed on the plate 18. The feed roller 82 is frictionally secured to a shaft 97, which is journalled in the bracket 90. The shaft 97 is provided with an enlarged collar portion 98 having one side thereof engageable and bearing against the bracket, as shownat 99, and the other edge thereof engageable with the rear side of the feed roller 82 as shown at .100. Extending through the feed roller 82 and formed as an integral part of the shaft 97 is a reduced portion 101. This reduced portion projects slightly beyond the front sur face of the roller 82 as shown at 102. The feed roller 82 is frictionally secured to the shaft 97 by means of a washer 103, which is rovided with a depression 101 and an annuar projecting rim 105. Extending through the washer 103 and in threaded engagement with the longitudinally threaded bore 100 in the shaft 97 is a belt 107.

From the above description it will be understood that the tightening of the bolt 107 compresses the annular rim 105 of the washcr 103 and frictionally clamps the feed roll- 75 or 82 between this washer and the enlarged collar portion 98 of the shaft 97. In order to maintain the washer 103 in relatively fixed position with respect to the shaft 97, I have provided a pin 108, which extends through the washer 103 and into the shaft 97 as clearly shown in Fig. 4. This prevents any rotation of the washer 103 with respect to the shaft 97. The object of this construction is to permit the washer to carry certain graduations as shown at 109 in Figs. 1 and 3 with a single indicating mark on the front surface of the roller 82 adjacent the graduating marks on the washer. By this arrangement the bolt 107 may be loosened and the feed roller 82 may be adjusted so that a certain graduation will permit the feeding of a predetermined length of wire to the staple and forming mechanism. The thumb engaging portion has a corresponding 95 graduation provided at 110 by means of which the cutter box may be adjusted with respect to the staple former so as to be positioned in such a manner that when the feeding mechanism and the cutting mechanism are adjusted to corresponding graduations, the wire fed by the feeding mechanism will be cut so as to be formed into staples in which the legs are of equal length. It will, of course, be understood that each of these two feed rollers, that is, roller 81 and roller 82, are provided with the usual projecting feeding cam surface 81' and 82, respectively, and that when the roller 82 is adjusted with respect to the roller 81 the length of wire fed will vary in accordance with the relative adjustment of these two rollers.

The mechanism for actuating the cutting mechanism during each cycle of operation will next be described.

This mechanism comprises an arm 111 having one end thereof pivoted at 112 to the plate 18. The free end of this arm 111 is provided with a roller 113, which is positioned to the rear of this arm, and is adapted to engage a cam 114 formed on the outer surface of the cam member 20, as clearly shown in Figs. 1, 2 and 3. Positioned on the free end of the arm 111 adjacent the roller 113 is a threaded barrel portion 115, which is adapted to receive a threaded bolt 116 with the head 117 thereof extending downwardly and in engagement with the bearing plate 77, in a manner to actuate the cutter knife 69 100 and knife carrier 63 in cutting the wire fed to the staple forming and driving mechanism. The bolt 116 may be adjusted to compensate for wear in these wearing parts and also to permit the proper adjustment when the cutting edges of the knife are ground. The bolt 116 is securely held in its adjusted positions in the threaded portion 115 of the arm 111 by a lock nut 118.

By the construction of the above described actuating mechanism for the cutting mechanism, it Will be understood that the cutter box may be adjusted horizontally through the medium of the thumb screw 55, and in all positions of adjustment, the cutting mechanism will always be actuated through the same cutting movement, regardless of its relative adjusted position.

The wire 119 from which the staples are formed is taken from the usual spool 120 carried on the spindle 121 supported on the arm 122, which projects from and is formed integrally with the plate 18. From the spool 120 the wire is fed over the curved -member 123 down through a straightening device 124 andthen through a guiding member 125.

After passing through the guiding member 125 it is engaged by a checking member 126, whichis adapted to prevent the withdrawal of the wire afteronce it has been fed past the feed rolls. From the checking member it passes down between the feed rollers or discs 81 and 82 and then through a curved feeding tube 127.

From the feeding tube it is passed through a wire guiding tube into the staple forming and cutting mechanism wherein it passes into the groove 40 formed in the forward end of the anvil and there held until the staple former forms the wire into a staple and the driver drives it into the material. The general construction above described of feeding the wire is the usual one employed in this type of wire stitching machine and the general construction per se does not form any part of the present invention, excepting so far as the improved means heretofore described may be employed in quickly adjusting the machine to drive staples of different lengths.

The wire straightening device shown in Fig. 13 and indicated by the numeral 124 is adjust-ably mounted in a boss or bearing portion 129, which is provided with a longitudinally extending bore 130, which slidingly receives an adjustable member 131 having one end thereof threaded and adapted to receive a thumb nut 132 for laterially adjusting the adjustable member in the bearin g portion 129. The adjustable member 131 is normally pressed outwardly by a com pression spring 133. On the end'of the mem ber opposite to the end to which the thumb nut 1.32 is secured I have'provided oppol sitely disposed straightening rolls 134 be tween which the wire is fed and by adjusting this thumb nut 132 these rolls 134 may be laterally adjusted so that proper straightening of the wire can be readily had. It will be understood, of course, that immediately above these wire straightening rolls 134 are two permanently fixed pins 135, between which the wire passes. These pins are secured to an extension of the side plate 18 and when the rollers are adjusted laterally with respect. to these pins 135 the Wire is readily strai htened.

In order to {permit the cutter knife 69, together with its carrying box 47 to be adjusted from one side of the staple former 27, it has been necessary to provide a vertically extending plate 56' which projects forwardly and engages one leg of the staple former 27 for the purpose of preventing the leg of the former from spreading, as clearly shown in Figs. 6 and 12. The member 56' is of course secured to the block 25 in any well known manner, preferably by screws 27, and thus-forms a lateral bearing for the reciprocating staple former.

From the above description, it will be seen that I have provided a very efiicient wire stitching machine and one in which the feeding mechanism and the cutting mechanism may be correspondingly adjusted by adjusting each of these parts to their corresponding graduations to stitch staples of various sizes with the least possible effort on the part of the operator, and' thereby saving considerable time and trouble in adjusting these machines to stitch staples of various sizes.

While in the above description, I have described one embodiment which my invention may assume in practice, it will of course be understood that the construction herein shown is capable of modification and that modification may be employed without departing from the spirit and scope of my invention as expressed in the following claims.

What I claim as my invention and desire to secure by Letters Patent is:

1. A wire st'itcher comprising a frame, wire feeding mechanism carried thereby, horizontally adjustable and vertically reciprocable cutting mechanism carried by said frame for cutting the wire fed by said feeding mechanism, and actuating means for said cutting mechanism including an arm pivoted to said frame and a screw adjustable in said arm for varying the vertical movement of said cutting mechanism. v

2. In a wire stitcher, the combinaton with a frame, of a drive shaft mounted thereon, a wire feeding mechanism operatively drivon by said shaft, a staple former mounted in said frame for vertical reciprocatory movement, a staple driver mounted in said staple former for vertical reciprocatory movement, a cam secured to said shaft and operatively connected to said staple former and driver, cutting mechanism mounted on Ill said frame and adjustable horizontally with respect to said staple former and driver, and an arm pivoted to said frame having a roller on one end thereof engageable with said cam for actuating said cutting mechanism, an adj ustable screw on said arm adjacent said roller adapted to engage said cutting mechanism, and means for locking said screw in its adjusted positions.

In testimony whereof I have signed my 10 name to this specification, on this 29th day of August, A. D. 1923.

ERNEST LESCHHORN.

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