US2006452A - Machine for inserting fastenings - Google Patents

Description

July 2, 1935. GODDU 2,006,452

MACHINE FOR INSERTING FASTENINGS I Filed July 28, 1952 2 Sheets-Shet 1 July 2, 1935. G. GODDU 2,006,452

MACHINE FOR INSERTING FASTENINGS Fi led July-28, 19:52 z'sneets-sh et 2 cal Patented July 2, 1935 UNITED STATES PATENT OFFICE Mass,

by Isabelle W. Goddu,

executrix,

' Winchester, Mass, assignor to United Shoe Machinery Corporation, Paterson, N. 1., acorporation of New Jersey Application July 28, 1932, Serial No. 625,370

14 Claims.

This invention relates to fastening inserting machines and is illustrated "as embodied in a machine particularly adapted to insert paper pegs in the manufacture of boots and shoes.

A considerable number of the operations performed in the manufacture of shoes include the driving of a fastening or fastenings through one shoe part into another or through 'a shoe part into a last. When this operation is performed by means of a machine which is not provided with a work support it has been necessary, for the operator to press the work piece, which he holds in his hands, firmly against the nozzle'or other fastening guide of the machine. This is laborious since the operator is forced to sustain the impact of the blow and, by reason of his failure to exert sufficient pressure, often results in poor work by reason of the layers through which the fastenings are inserted not being squeezed closely together. A well-known operation, which may beused to illustrate an example of this difficulty, is McKay sole laying, that is the preliminary attachment of soles to McKay shoes by fastenings driven through the soles into the lasted upper and insole. It is often found that, by reason of failurerof the operator to press provide an improved machine by which thelayers of a work piece will be forced together by a hammer-blow substantially at the instant of the start of the driving of the fastening whereby, even in the absence of a Work support, the fastenings will hold the layers in close engagement with each other.

In accordance with this object a feature of the invention resides in a fastening inserting machine having means for inserting fastenings in a work piece, a member through which a fastening is inserted into the work, and means including a lever arranged to move said member against the work to impart a hammer blow to the work immediately prior to the insertion of a fastening.

The illustrated machine is also provided, in

' accordance with another ,feature 'of the invention, with means for maintaining the nozzle in. a position towardthe'work until after the fastening receiving hole. has been formed in the work. The means is illustrated herein as a latch arranged to engage the connection between the bell crank lever to maintain the nozzle position toward the W01k.. V

While the invention is illustrated herein as embodied in a fastening inserting machine'particularly adapted to drive fibre pegs into the sole portions of shoes, it should be notedthat the invention is not limited in its utility to: such use or to embodiment in fastening inserting machines of the type illustrated and, accordingly; the con struction disclosed herein should be regarded as merely one example of the forms'inwhicli this invention may be embodied.

With the above and other objects in View th invention will now'be described with reference to the accompanying drawings and pointed out in the claims. 1

In the drawings, 1

Fig. 1 is a side elevation of the head of a fastening inserting machine embodying this in-- vention;

Fig. 2 is a detail view of the clutch mechanism for stopping and starting the machine;

. Fig. 3 is a sectional view taken along the line III III of Fig. 1, showing on an enlarged scale the nozzle reciprocating mechanism;

Fig. 4 is a cross sectional view taken through the shank portion of a lasted shoe after one side of the sole has been temporarily secured; and

Fig.5 is a view similar to Fig. 4 but showing both sides of the sole'temporarily secured to the shoe.

The machine is provided with 'a head l2 in which the operating instrumentalities of the machine are mounted. The head I2 is mounted on a column l4 which is made up of two telescoping and relatively adjustable sections (not shown). An electric motor is mounted in the column and connected 'to a shaft (not shown) housed in the column, which in turn is connected to a friction clutch. The clutch is secured to one end of a shaft IE on which is mounted a group of cams preferably formed as a unit and hereinafter inits designated as a cam member indicated generally The clutch member 22 is provided witha collar 24. The collar or hub 24 is provided with a pair of pins 25 on opposite sides of the shaft-l6 engaging hooks formed in the upper end of a lever 26 fulcrumed at 28 to the head of the machine. Thus the lever 26 can be held in position to compress the spring 28 to maintain the clutch member 24 in its forward or non-power transmitting position while, when the lever 28 is rocked by mechanism hereinafter described through a treadle rod 30 in a clockwise direction, the clutch member 22 is moved rearwardly by the force of the spring 28 into engagement with the constantly driven clutch member and thus becomes effective to transmit power to the cam member 8.

The machine is provided with a single tool 32 arranged to operate both as an awl and as a driver. The tool 32 is clamped to a tool carrier mounted for vertical reciprocation in a guideway carried by or formed in the head [2 of the machine.

The mechanism for giving the tool 32 its awl stroke and its driver stroke includes a lever 34 fulcrumed at 36 to; the head of the machine and having two parallel'arrns pivoted at their rear ends to a link 38 positioned approximately vertically and ending at. its lower end in a slot 48 formed in a rearwardly extending arm of a bell crank lever 42 fulcrumed at 44 to the head of the machine and having an upwardly extending arm 46 carrying a cam roll 48 positioned in a cam track 551 formed in the cam member 18. The slot 46 is formed on an arc of a circle having a radius equal to. the distance between the pivots of the arm 38 and positioned concentric with the pivotal connection between the link 38 and the lever 34 at the time of the driver stroke of the tool 32. The form of a cam track 50 is such as to position the lever 34 in its uppermost position early in the cycle of operation when the tool 32 is acting as an awl and to position the lever 34 in its lowermost position later in the cycle when the tool is operating as a driver.

Fulcrumed at 52 to the lever 34 is another lever 54 which is provided at its forward end with teeth (not shown) entering the openings between corresponding teeth formed in the upper end of the tool carrier. A stiff coil spring surrounds the fulcrum 52 of the lever 54 and is anchored at one end to a disk 56 which is adjustably secured to the lever 34' by a pin 58. The other end of the spring is secured to a housing secured to or formed as a part of the lever 54. The spring thus tends at all times to rotate the lever 54 in a counter-clockwise direction, as viewed in Fig. 1, and to urge the tool carrier and the tool 32 downwardly.

At its forward end the cam member I8 is provided with a lifting cam 68 having a pair of elevated portions (not shown). Mounted for vertical sliding movement in the head l2 of the machine is a lifting bar 62, the lower end of which bears against the lifting cam 50 and thus serves as a lifting block. The bar 52 is provided with a block (not shown) which is positioned in a slot formed in the lever 54. Thus, as the cam member 63 rotates, the lifting bar 52 is elevated by the cam, the lever 54 being rocked upwardly.

Then when one elevated portion of the cam 83 passes out from beneath the end of the lifting bar 62 the spring above referred to forces the lifting bar downwardly, thus rocking the forward end of the lever 54 downwardly in a counterclockwise direction, as shown in Fig. l, and forcing the tool 32 downwardly. The first downward movement of: the tool 32 occurs when the fulcrum 52 of the lever 54 isinits uppermost position, the tool 32 then being forceddownwardly through a nozzle 64 and into the work to form a fastening receiving hole. When the shaft l6 has been rotated another 130 and the upper elevated portion of the cam 60 has raised the tool 32 and passed out from beneath the lifting bar 62 the fulcrum 52 of the lever 54 has been moved to its lowermost position. Thus, the downward movement of the tool 32 is only sufiicient to drive the fastening which at that time has been brought into alinement with the throat opening of the nozzle 64 and with the tool 32;

In order to permit the machine to be used to drive fastenings of either of two lengths as may be desired, for example, in McKay sole laying where it is preferable to use shorter fastenings to secure the forepart of the sole than are used in the heel seat, the machine is provided with mechanism for varying the position of the lever 34 and the fulcrum 52 of the lever 54 at the time of the awl stroke or the tool 32. For this purpose the link 38 is pivotally connected somewhat above its lower end to a link 66 pivoted at its other end to an approximately vertical lever 68 fulcrumed at M to the. head of the machine and having its lower end connected by a link 1'2 to a bell crank lever l5 fulcrumed at 76 to the head of the machine and urged in a counterclockwise direction by a spring (not shown). The bell crank lever 14 a rearwardly extending arm connected by an adjustable rod 80 to a treadle mounted in the base of the machine and arranged by its displace ment to move the rod 83 downwardly thus rocking the bell crank lever 74 and the lever 58 in a clockwise direction as viewed in Fig. 1 against the action of'the spring 18 and moving the lower end of the link 38 rearwardly in the slot 48 of the lever 52. Thus, when the operator steps on the treadle the amplitude of the rocking movement of the lever 34 above its fulcrum 3G is greater than when the treadle is in its normal posi tion." The fulcrum 52 of the lever 54 is, accordingly, raised to a greater extent at the time of the awl stroke of the tool 32 if the treadle is displaced and the forward end of the lever 54 is correspondingly lowered to a greater extent at the time of the awl stroke of the tool 32 so that a deeper hole is made in the Work piece presented to the nozzle 34.

In order definitely to determine the depth of the holes formed in the work depending upon whether the treadle is elevated or depressed the bell crank lever 14 is provided with a slot 82 in which is carried a pair of adjustable stops 34, 86 clamped in desired position by screws 88, 93. A stationary pin 92 carried by the head I2 of the machine, is engaged by one or the other of the stops and thus controls the upper position of the treadle and the extent to which the treadle can be displaced Conveniently a scale is carried by the lever 14 to aid in the proper positioning of the stops 84, 86.

The illustrated machine is arranged to be started by a downward movement of the treadle rod 33 which is connected at its lower end to: a second treadle (not shown) and at its upper end to an free end of the trip lever life-is provided with a i 98 thus leaving the notch or recess intowhich fits the lower end of the other arm. of the bell. crank lever I132. The bell crank lever I 02 is pivoted to the lower end of the lever 25- and has a forwardly extending arm which is pivoted to a link Iil l connected to a sliding member N35. The sliding member W5 is mounted for forward and rearward movement and has a cam roll which rides in a cam path 50 formed in the cam member I8. Surrounding the shaft 953 is a torsion spring H33, one end of which bears against the pin III! and the other end bears against the frame of the machine, thereby causing the trip lever Ifiil normally to be urged upwardly into engagement with the lower arm of the bell crank lever I62. When the machine is brought to a stop, the toggle formed by the arm IE2 and the link M14. is partly broken and is held in this condition by the engagement of the lower arm of the bell crank lever by the notch formed in the hooked end of the trip lever me. This holds the lever 2t securely in the position shown in Fig. 2 with the spring 20 under compression and the clutch member 22 in non-power transmitting position. ,When the treadle rod 39 is moved downwardly the bell crank lever 94 is rocked about its fulcrum 96 thus moving the trip lever I69 downwardly to an extent sufficient to release the lower arm of the bell crank I02 from the notch in the latched or hooked end IIJil, the

lower end of the lever moving to the right along an arcuate surface formed on the arm 98 as a toggle formed by the arm H32 and the, link IM breaks completely under the pressure applied to the upper end of the arm as by the spring 23. Thus the clutch member 22 is moved rearwardly by the spring 2E5 to power transmitting position and the machine starts. In order to stop the machine at the'end of each cycleof operation the sliding member Hi5 to which the link I34 is connected moves forwardly and straightens the toggle I02, Hi l so that when later in the cycle the movable member I65 is movedrearwardly by the cam 50 the lower end of the lever 25 is moved to the left. At the same time the lower end of the bell crank lever I92 enters the notch formed in the hooked end Ills of the bell. crank lever arm parts in the condition shown in Fig. 2. 1

V The mechanism for feeding paper twine IE6, from which the fibre pegs Illinserted by the machine are formed, is not described herein since any well-known form of feeding mechanism may be used. The twine is fed through. a tube I I8 into a passage formed in a transfer bar I291 The transfer bar I28 is provided with a cam roll I22 positioned in a cam track I24 formed in the cam member I8. Thus after the tool 32 has completed its work penetrating stroke and has been returned to substantially its original position the transfer bar I26. is moved forwardly cutting a fastening of proper length from the twine and moving the peg so formed into alinement with the path of movement of the tool 32. The lever 33 in the meantime has been moved downwardly, thereby shifting fulcrum 52 of the lever 54, and the cam 50 raising the lever 55 about its fulcrum 52', bringing the tool 32 into position to drive the fastening in the passage in the transfer bar I20.

In operating upon certain types of shoes; for example McKay shoes, it is desirable to lay the sole prior to permanentlysecuring the sole in position on the shoe by stitches or other fastenings. Ordinarily a numb-er of spaced fastenings are driven through the outsole and into the overlasted margin of the upper and insole. When The illustrated machine has been provided with means for bringing the edge of the sole close to the adjacent portion of the shoe upper and, as

illustrated, the nozzle E l, which is slidably mounted in the head of the machine, is provided with means to impart a hammer blow to the work just prior to the insertion of a fastening. The forward portion of the nozzle 64 is provided with a plurality of teeth I25 which engage teeth I28 formed on one arm of a bell crank lever I36 fulcrumed at I32, to the head I2 of the machine. Theother arm of the bell crank lever I is provided with an adjusting screw I34 which is locked in adjusted position by a lock nut I35. The end the adjusting screw I34 engages a sliding bar I36, which is mounted for movement in holes formed in the head of the machine. The transfer bar I2Il at its rear endis provided with a lat erally projecting lug I38 which is arranged upon movement of the transfer bar I20 to feed'a fastening into the line of drive of the tool 32 to engage the end of the slidable bar I36, thereby moving the bell crank vlever I3il in a clockwise direction. The transfer bar I20. moves at a comparatively high rate of speed which is sufficient to move the nozzle 6d approximately one-eighth of an inch and, because of the speed of movement of the nozzle 64, a hammer blow is imparted to the work which will bring the edge of an outso-le I ill close against the adjacent portion of an upper I 42 of a lasted shoe. As shown in Figl 4 of the drawings one edge of the outsole has not been secured and it would, perhaps, be difiicult to se- 'cure the other edge of the outsole M0 against the upper I42 of a lasted shoe. But the hammerlike blow imparted to the nozzle 64 strikes the outsole I and brings'it into. close engagement with the bottom of the shoe. It should be noted at this point that, although a substantial blow is given to the work, the inertia of the lasted shoe will counteract the blow delivered by the nozzle 64.

When the nozzle 64 is in its upper position the tool 32, particularly at the conclusion of the hole forming operation of the tool 32 would project too far beyond the end of thev nozzle, thereby moving the work away from the nozzle which I might in some cases result in improper alinement of the hole in the shoe with the fastening to be inserted in thathole. It is desirable, therefore, to provide means for maintaining the nozzle in its lower'position until just before a hammer blow is imparted to the work. The sliding bar I36 is provided with a notched portion M4 into which is fitted a latch I55 fulcrumedat I48. to a plate I secured to the machine head I2 by screws I52.

Secured to the pin forming the fulcrum M8 is a lever 54 arranged to be engaged by a spring trip which is secured to the bell crank lever it by a machine screw I58. The latch M4 is normally urged downwardly by a spring I69. When the bell crank lever IZCis swung in a clockwise direction as viewed in Fig. l the spring trip I56 moves upwardly raising the endof the latch we cut of the recess I44 thereby permitting the sliding bar I35 to be moved toward the right under the influence of a torsion spring I62 which is secured t l the fulcrum of the bell crank lever I39; The nozzle 64 is, therefore, maintained in its lower position until just prior to the hammer stroke.

While the operation of the various parts of the helpful now to consider the operation of the machine as a whole. With the parts of the machine in position shown in Fig. 1, the work in which the fastenings are to be inserted (for example, a lasted McKay shoe to which the outsole Edi) is to be preliminarily attached or laid) is presented by the operator to the nozzle 64. The operator then trips the clutch by rocking the lever 93 in a clockwise direction, as shown in Fig. 1, thereby permitting the toggle I02, I04 to be broken under the influence of the spring 20. The spring 20 thus moves the clutch member 22 to the left into power transmitting position and the cam member I8 begins to rotate. During the early part of the cycle the nozzle 64 is maintained in the position shown in Fig. 1 and the tool 32 is driven down and passes through the lower end of the nozzle 64 to form a hole in the work. Then the lifting bar 62 and the tool 32 are lifted by an elevated portion of the lifting cam 69, the lever 34 at the same time being rocked about its fulcrum 36 to lower the fulcrum 52 of the lever 54 so that the next stroke of the tool 32 will serve as a driving stroke. At the same time the strip of fastening material I I6 is fed downwardly an appropriate distance. When the fulcrum 52 of the lever 54 is shifted by rotation of the bell crank lever 42 the spring trip I55 engages the lever I54, moving the latch out of the recess in the sliding bar I38. The shear member or transfer bar I28 then moves forwardly to sever a fastening and to bring the passage therein into alinement with the tool 32 in the opening of the nozzle 82. At the same time the nozzle 64 is driven against the work by the mechanism described above. As the transfer bar or shear member IZii moves forwardly the toggle Hi2, I96 is straightened so that as the rod I05 moves rearwardly after the fastening has been driven the lever 26 will be rocked about its fulcrum compressing the spring 29 and moving the clutch member 22 into non-driving position. As the lever 26 is thus rocked, the lower end of the lever is caught in the notch formed in the hooked end I00 of the bell crank lever 98 so that the machine comes to rest with the toggle latched in a partly broken condition, as shown in Fig. 2.

Having thus described the invention, what is claimed as new and desired to be secured byLetters Patent of the United States is:

1. In a fastening inserting machine, means for inserting fastenings in a work piece, a member through which a fastening is inserted into the work, and means including a lever arranged to move said member against the work to impart a hammer blow to the work immediately prior to the insertion of a fastening. v I

2. In a fastening inserting machine, a tool for forming a fastening receiving hole in a work piece and for inserting a fastening in said hole, a transfer bar constructed and arranged to: sever a fastening from a strip of fastening material and to move said fastening into the path of movement of said tool, a nozzle arranged for movement toward and from the work, and connections between said nozzle and said transfer bar constructed and arranged to impart a hammer blow to the work prior to the insertion of the fastening in the work.

3. In a fastening inserting machine, means for inserting fastenings in a work piece as the work is held in the hands of an operator, 2. member having a passage through which a fastening is inserted into the work, and means including a bell crank leverfor moving said member against the work to impart a hammer blow to the work immediately prior to the insertion of the fastening.

4. In a fastening inserting machine, means for inserting fastenings in a work piece, a member for moving a fastening into the path of movement of the inserting means, a second member having a passage through which the fastening is inserted into the work, and means including lever connections between said members for moving the second member against the work to impart a hammer blow to the work immediately prior to the insertion of a fastening.

5. In a fastening inserting machine, means for inserting fastenings in a work piece, a member for moving a fastening into the path of movement of the inserting means, a member having a passage through-which the fastening is inserted into the work, and means including a bell crank lever: connected to said first-mentioned member and 'to said last-mentioned member for moving said member against the work to impart a hammer blow to the work prior to the insertion of a fastening.

6. In a fastening inserting machine, means for inserting fastenings in a work piece, a device for moving a fastening into the path of movement of the inserting means, a movable member hava passage through which the fastening is inserted into the work, and a bell crank lever connected to said device and constructed and arranged'to move said member against the work to impart a hammer blow to the work prior to the insertion of a fastening.

7. In a fastening inserting machine, a tool for forming a fastening receiving hole in a work piece and for inserting a fastening in said hole, a transfer bar constructed and arranged to sever a fastening from a strip of fastening material and to move said fastening into the path of movement of said tool, a nozzle arranged for movement toward and from the work, and connections between said nozzle and said transfer bar including a bell crank lever and a sliding bar constructed and arranged to impart a hammer blow to the work prior to the insertion of a fastening in said fastening receiving hole.

8. In a fastening inserting machine, a tool for forming a fastening receiving hole in the work piece and for inserting a fastening in said hole, a transfer bar having a passage therein for receiving a fastening and for moving the fastening into fastening inserting position, 'a member arranged for movement toward a work piece to impart a hammer blow to the work piece prior to the insertion of the fastening, and means for holding the member toward the work during the hole forming operation.

9. In a fasteninginserting machine, a tool for forming a fastening receiving hole in a work piece and for inserting a fastening in said hole, a transfer bar for moving a fastening into the path of movement of said tool when said tool is operating as a driver, a nozzle movable toward the work to impart a hammer blow to the work, a bell crank lever connected to said nozzle, and means connecting said transfer bar and said lever whereby movement of the transfer bar is transmitted to the nozzle to impart a hammer blow to the work prior to the insertion of a fastening in said fastening receiving hole.

10. In a fastening inserting machine, a driver for inserting a fastening in a work piece, means for severing and feeding a fastening into the path of movement of the driver, a member having a passage therein throughwhich the driver moves to insert a fastening in the work piece, and means including a geared connection between said severing means and said member for moving said member toward the workto impart a hammer blow to the work prior to the fastening inserting operation.

11. In a fastening inserting machine,- a re ciprocable tool for forming a fastening receiving hole in the work piece and for inserting a fastening in said hole, a transfer bar having a passage therein for severing a fastening from a strip of fastening material and for feeding the severed fastening into the path of movement of the tool,

a nozzle having a driver passage therein, teeth onsaid nozzle, a bell crank lever, teeth on the hell crank lever meshing with the teeth on the nozzle, and means connecting said transfer bar and said bell crank lever to impart movement to said nozzle prior to the insertion of a fastening in the Work.

12. In a fastening inserting machine, a re ciprocable' tool for forming fastening receiving hole in the work piece and for inserting a fastening in said hole, a transfer oar having a passage therein for severing a fastening from a strip of fastening material and for feeding the severed fastening into the path of movement of the tool, a nozzle having a driver passage therein, teeth on said nozzle, a hell crank lever, teeth on the bell crank iever meshing with the vteeth on the nozzle, means connecting said transfer ear and said bell crank lever toimpart movement to said nozzle prior to the insertion of a fastening in the work, and means for maintaining the nozzle in its position toward the work during the hole forming operation.

13. In a fastening inserting machine, a reciprocable tool for forming a fastening receiving hole in the work piece and for inserting a fastening in said hole, a transfer bar having a passage therein for severing a fastening from a strip of fastening material and for feeding the severed fastening into the path of movement of the tool, a nozzle having a driver passage therein, teeth on said nozzle, a bell crank lever, teeth on the 14. In a fastening inserting machine, a reciprocable tool for forming a fastening receiving hole in the work piece and for inserting a fastening in said hole, a transfer bar having a passage therein for severing a fastening from a strip of fastening material and for feeding the severed fastening into the path of movement of the tool, a nozzle having a driver'passage therein, teeth on said nozzle, a bell crank lever, means nor mally urging the nozzle away from the work, teeth on the bell crank lever meshing with the teeth on the nozzle, means connecting said transfer bar and said bell crank lever to impart movement to said nozzle prior to the insertion of a fastening into the work, a latch for'maintaining the nozzle in position toward the work, and means constructed and arranged to release the latch after a fastening receiving hole has been formed in the work piece. i

' ISABELLE W. GODDU,

Executrix of the Will of George Goddu, Deceased.

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