US1583935A

US1583935A - Stitching machine

Info

Publication number: US1583935A
Application number: US685944A
Authority: US
Inventors: Leschhorn Ernest
Original assignee: LATHAM MACHINERY CO
Current assignee: LATHAM MACHINERY CO
Priority date: 1924-01-14
Filing date: 1924-01-14
Publication date: 1926-05-11
Anticipated expiration: 1943-05-11

Description

May 11 ,1926. 1,583,935

E. LESCHHORN STITCHING, MACHINE Filed Jan. 14, 1924 3 Sheets- Sheet 2 May 11 1926. 7 1,583,935 E LESCHHORN srncame momma Filed Jan. 14. 1924 s Sheets-Sheet 5 Patented May 11, 1926.

UNITED STATES 1,583,935 PATENT OFFICE.

ERNEST LESCHHORN, OF CHICAGO, ILLINOIS, ASSIGNOR TO LA'IHAM MACHINERY COMPANY, OF CHICAGO, ILLINOIS, CORPORATION OF ILLINOIS.

STITCI-IING MACHINE.

- Application filed January 14, 1924. Serial No. 685,944.

This invention relates to an improved stitching machine.

The principal object of the present invention is to provide a simplifiedstitching machine in which the number of parts used to construct the machine arereduced to a minimum. 7

A further object of the invention is to provide a very efficient and inexpensive 1O stitching machine in'which all the parts are compactly arranged.

A still further object of the invention is to reduce the number of operative parts of a stitching machine to a minimum and thereby prolong the life of the machine.

A still further object of the invention is to provide a stitching machine in which one of the feed rollers is secured to the main drive shaft and positioned directly above the staple forming and driving mechanism.

A still further object of the invention is to provide an improved form of wire feeding mechanism.

A still further object of the invention is to providsa compact stitcher head which can be quickly detached or removed from the arm of the main frame.

These and other objects are accomplished by providing a construction and an arrangement of the various parts in the manner hereinafter described and particularly pointed out in the appended claims.

Referring to the drawings, Fig. 1 is a front elevational view of my improved and simplified stitching machine.

Fig. 2 is a cross sectional view of the same taken on the lines 22 in Fig. l.

Fig. 3 is a cross sectional view taken on the lines 33 in Fig. 1.

Fig. 4 is a cross sectional the lines 4-4 in Fig. 3.

Fig. 5 is a-detailed view showing a front elevation of the cutting mechanism.

Fig. 6 is a top plan andside elevational view respectively of my improved wire feeding mechanism.

Fig. 7 is a cross sectional view taken on the lines 77 in Fig. 5 and Fig. 8 is a detailed view showing the manner in which the upper feed roller is cocentrically mounted on the shaft.

For the purpose of illustration I have shown'iny improved and simplified stitching machine detachably secured to an arm 10 of "the main frame of the stitching machine.

View taken on The stitcher head is removably secured to the arm 10 by means of bolts 11. These bolts 11 secure radially extending flanges 13 of the arm 10 to a plate 14. The plate 14 has secured thereto by means of screws 15 a spool supporting bracket 16, which is offset with respect to the longitudinal center of themachine and supports on the upper end thereof a spool of wire 17. The spool is held from accidental rotationby a pressed spring brake 18 which has its outer end curved substantially in the form of a semi-circle 19 for guiding the wire through the usual wire straightening device 20 and wire spring pressed check mechanism 21. Rotatably mounted within the arm 10 in suitable bearings, not shown, is a main drive shaft '22, the outer end of which is provided with a driving pin'23 which is adapted to be seated in a recess 24 formed in the sleeve 25 of the spur gear 26, for detachably securing the operative parts of the stitcher head to the main drive shaft 22 of the stitching machine. The outer end of the main shaft 22extends into the sleeve 25 of the spur gear 26 and butts against one end of a stud 27, as shown at 28. The stud 27 is journalled in ahearing portion 29 of the'plate 14. The gear 26 is secured to the stud-27 by a pin 30. This arrangement permits the stud 27 to be substantially a continuation of the main drive shaft 22 and at the same time permits the stitching head to be detached from the arm 10 when it is desired to remove the head. Secured to the reduced portion 31 of the stud 27 is a cam 32. Positioned forwardly of the cam 32 is asecond cam 33, which has a wire feeding surface 34 on the outer periphery thereof. These

cams

32 and 33 are secured to the stud v in any well known manner. Positioned directly above the cam 33 and operatively driven by a gear 3.5, which is secured to a stud 36 is a second feed cam or roller 37 which is provided with a peripherally projecting cam surface 38 which in turn co-operates with the feeding surface 34 of the cam 33 for impinging the wire therebetween and feeding the wire to the staple forming and driving mechanism. The stud 36 is mounted in a bearing portion 39 of the plate 14. 'The stud 36 has formed in tegrally therewith a collar portion 40 which bears against the front face of the plate 14. Adjustably mounted on a reduced portion 41 of the stud 36 is a feed rollersupport 42.

Pivotally mounted by means of a pin 43 is the feed roller or cam 37. The feed roller 37 is provided with a centrally disposed bore 44. The bore 44 of the feed roller 37 loosely receives the forwardly projecting annular flange 45 formed integrally with the feed roll supporting member 42. The feeding surface 38 of the feed roller 37 is normally pressed outwardly by a compression spring 46 which has one end thereof seated in a socket 47 of the feed roller support 42 and the other end thereof engaging a pin 48 secured to the feed roller 37 on the rear side thereof, as clearly shown in Figs. 1 and 2. It will be noted that the annular flange 45 of the feed roller supporting member 42 projects slightly beyond the front surface of the feed roller 37 in such a manner that a washer 49 and a bolt .50 clamp the feed roller supporting member 42 between the washer and the annular flange 40 of the stud 36 and thereby permit the roller supporting member 42 to be rotatably adjusted with respect to the stud 36. It will further be noted that because the bore 44 of the roller 37 is larger in diameter than the flange 45 of the feed roll supporting member 42, the feed roller 37 may swing about its pivot 43 on the member 42 for resiliently impinging the wire between the cam'surface 38 of the roller 37 and the cam surface 34 of the feed cam 33 for feeding the wire to the staple forming and driving mechanism. \Vhen it is desired to vary the length of wire to be fed to the staple forming and driving mechanism the bolt 50 may be loosened so that the feed roller 37 together with its supporting member 42 may be rotatably adjusted with re spect to the stud 36 and thereby vary the position of the cam surface 38 with respect to the cam surface 34 for varying the length of wire fed.

From the above it will be noted that by positioning one of the feed rollers on substantially the main drive shaft I have eliminated a number of intermediate operative parts and have compactly arranged the feeding mechanism in close association with the main drive shaft. Formed in the front side of the plate 14 is the usual staple former channel 51 having reciprocally mounted therein a staple former 52, which, in turn, 15 provided with a vertically extending cl1annel 53. The channel 53 of the staple former 52 has reciprocally mounted therein a staple driver 54. The staple former 52 is opera tively driven to form the staples by the cam 32, which engages a roller 55 journalled on a pin secured to the rear side and upper end of the staple former. Thestaple former is normally returned to its uppermost position by a compression spring 56, which is seated in a socket 57 formed in the forward side of the plate 14 adjacent the staple former. The upper end of the compression the ter block 73. g

with its reciprocally mounted plate 78 is spring 56 is positioned in a tubular member 58 which normally engages a pin 59 secured to the rear side of the staple former just below the roller 55, the tubular member being reciprocally mounted in the bore 57 of the block 14. The staple driver 54 is operatively driven by the usual pitman connection 60, which has one end thereof connected, as shown at 61, eccentrically with respect to the axis of the cam 33 and the other end thereof connected, as shown at 62, to the upper end of the driver. (lo-operating with the staple forming and drivingmechanism is the usual anvil 63 and staple supporter 64. The anvil 63 is provided with a wire groove 65 and a compression spring 66, which normally forces the anvil out into the path of the staple forming and driving mechanism. The staple supporter is normally actuated into the path of the staple forming and driving mechanism by means of a compression spring 66", which acts on a plunger 67. The anvil 63 and staple supporting mechanism 64 in co-operation with the staple forming and driving mechanism, operates in the manner well known in the art, and a more detailed description of the operation and construction of this mechanism is thought unnecessary.

Adjustably mounted adjacent the staple forming and driving mechanism is my improved wire cutting mechanism which comprises a horizontally adjustable block 68 which has a rearwardly extending portion 69, which is adapted to slidably engage the channel 70 formed on the forward face of I plate 14 for horizontally adjusting the block 68 with respect to the staple forming and driving mechanism. Mounted in the block 68 in any well known manner is the usual cutter tube 71. Secured to the block 68 at theiopposite ends thereof and extending upwardly therefrom are two guide pins 72. Reciprocally mounted on the guide pins 72 is a cutter block 73 and secured to the cutter block 73 on the side adjacent the staple forming and driving mechanism by means of a screw 74 is the usual knife 75. Formed on the inner side and adjacent the top of the cutter block 73 is a projecting flange 76 having thereunder an undercut channel 77. Intermeshing with the flange 76 and the recess or channel 77 in a manner to engage and operatively actuate the cutter block 73 is a reciprocally mounted plate 78 which is positioned between the front plate 79 and the main plate 14 of the stitcher head.

The front plate 79 is provided with an offset portion as shown at 80, which forms a stop for the upward movement of the cut- The cutter block 73 together normally actuated to its uppermost position by a compression spring 81, which is seated in a recess 82 formed on the front side of the plate 14, as shown in Figs. 3 and 4. The

upper end of the compression spring 81 is adapted to engage a pin 83 secured to the rear side of the reciprocally mounted plate 78. Thecutting mechanism is actuated to cut the wire by a lever 84 pivoted at 85 to the plate 14. The lever 84 has an upwardly curved portion, as shown at 86, which is adapted to be engaged by a cam portion 87 formed as an integral part of the cam member 33. The lever 84 is further provided with the laterally projecting portion 88 which is adapted to have in threaded engagement therewith an adjusting screw 89 and a lock nut he lower end of the adjusting screw 89 is adapted to engage the upper portion 91 of the reciprocally mounted plate 78. By this construction it will readily be seen that during each cycle of operation the cam surface 87 of the cam 33 will engage the free end 86 of the lever 84 and swing said lever in a counter-clockwise direction, thereby forcing the reciprocating plate downwardly with its cutter block 73 and actuating the knife to cut the wire extending through the cutter tube 71. In connection with adjusting my cutter box horizontally with respect to the staple forming and driving mechanism I have provided a series of tapered or conical cavities 92, which are adapted to be engaged by a tapered or conical point 93 of thumb screw 94. The thumb screw 94 is in threaded engagement with the front plate 79, as shown at 95.

From the above it will readily be understood that when itis desired to adjust the cutter block 73 together with the cutter tube and block 68 the thumb screw 94 is unscrewed from engagement with one of the cavities: 92 of the block 68 and the cutter blocks 73 and 68 are horizontally adjusted by sliding this cutting mechanism horizontally in the channels or

intermeshing parts

76 and 77 between the lower end of the re ciprocating plate 78 and theupper part of the cutter box 73. In making this adjustment it will also be noted that the rearwardly projecting portion 69 of the block 68 is horizontally adjusted in the channel of the plate 14.

In the operation of the above described device it will be understood that the wire is fed from the spool 17 around the semi-circular guide member 19 throughthe wire straightening and

wire checking devices

20 and 21, respectively, where it is engaged by the feeding surfaces 38 and 34 of the

feed rollers

37 and 33, respectively, through a circular guide tube 96 into the cutter tube 71, where it passes into the groove formed on the front side of the anvil. After the wire is thus fed, the cam 87 of the feed roller 33 engages the free end 86 of the lever 84 and actuates the lever about its pivot 85, depressing the cutting mechanism 73 through the reciprocating plate 78 against the tension of the compression spring 81 causing the wire to be severed. Simultaneously with the severing of the wire, the cam 32 engages the roller 55 and depresses the staple former 52 against the compression spring 56. At the completion of the staple forming operation the staple driver 54 is then actuated through the medium of the pitmanconnection 60 in driving the staple into the work beneath the head. I It will be understood, of course, that the anvil 63 is forced from the path of the staple forming and driving mechanism by the staple driver which engages the bevelled front face of the anvil in its downward movement and that the staple supporting member 64 is likewise withdrawn by the downward action of the staple driver as it is completing its work in driving the staple. j

From the above description it will be readily seen that I have provided a very simple and eflicient wire stitching machine and one in which the parts are reduced to a minimum and at the same time I have retained a wide range of adjustments. By mounting one of the feed rollers or feed cams of the feeding mechanism on the main or drive shaft I have provided a construction in which all the parts are compactly arranged so that a very inexpensive and yet efficient stapling machine has been provided.

While in the above specification I have described one embodiment whichmy inven tion may assume in practice, it will, of course, be understood that the same 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: r

1. A wire stitching machine comprising a frame, a drive shaft mounted in said frame, a detachable stitcher head mounted on said frame, a stud mounted in said head forming a continuation of said shaft, and

means whereby said stud may be detachably connected to said drive shaft.

2. A wire stitching machine comprising a ,to said frame, a stud mounted on said stitcher head and having wire feeding mechanism operatively connected therewith, staple forming and driving mechanism 0 era- ,tively connected with said stud, and a s eeve whereby said stud may be detachably connected with said shaft and operatively driven thereby. V 1

6. A wire stitching machine comprising a frame, a driving shaft mounted in said frame, a stitcher head detachably secured to said frame, a stud mounted on said stitcher head and having wire feeding mechanism;

operatively connected therewith, staple forming and driving mechanism operatively connected with said stud, and a sleeve secured to said stud and slidably connected with said shaft whereby said stud may be.

detachably connected with said'shaft and operatively driven thereby. V

7 A wire stitching machine comprising a frame, a driving shaft mounted in said frame, a stitcher head detachably secured to said frame, a stud mounted on said stitcher head, a wire feed roller secured to.

said stud, a second feed roller mounted on said head co-operating with said first named roller, and a sleeve secured to said stud and adapted to slidingly engage said drive shaft for operatively driving said feed rollers.

8. A wire stitching machine comprising a frame, a driving shaft mounted in said frame, a stitcher head detachably secured.

to said frame, a stud mounted in said head forming a continuation of said drive shaft, a feed roller carried by said stud, a second feed roller mounted in said head and positioned directly above said first named roller and co-operating therewith to feed a wire between portions of their peripheries, and a sleeve secured to said stud and slidingly engaging said drive shaft whereby said head may be detached from said frame.

9. A wire stitching machine comprising a frame, a drive shaft mounted on said frame, a stitcher head detachably secured to said frame, a stud mounted on said stitcher head and having wire feeding mechanism opertively connected therewith, staple forming and driving mechanism operatively connected with said stud, a driving pin secured to said drive shaft, and a sleeve secured to said stud and having means for engaging said driving pin whereby said stud may be detachably connected with said shaft and operatively driven thereby.

10. A wire stitching machine comprising a frame, a drive shaft mounted on sald frame, a stitcher head detachably secured to said frame, a stud mounted on said stitcher head and having wire feeding mechanism operatively connected therewith, sta-,

pie forming and driving mechanism operatively connected with said stud, a driving pin secured to said drive shaft, and a sleeve secured to said stud and having a recess formed therein for engaging said driving pin whereby said stud may be detachably connected with'said shaft and operatively driven thereby.

11. A wire stitching machine comprising a frame, a driving shaft mounted on said frame, a stitcher head detachably secured to said frame, a stud mounted in said head forming a continuation of said driving shaft, a feed roller carried by said stud, a

second feed roller mounted in saidhead and positioned directly above said first named roller and cooperating therewith to feed the wire between portions of their peripheries, a driving pin secured to said driving shaft, and a sleeve secured to said stud having a recess formed therein for engaging said driving pin whereby said sleeve may slidablyengage said shaft for detachably connecting said head to said frame.

In testimony whereof I have signed my name to this specification on this 9th day of January A. D. 1924.

ERNEST LESGHHORN.