US3180550A - Fastener forming and inserting device - Google Patents

Description

Alll'll 27, 1965 n. aoYNToN ETAI. 3,180,550

FASTENER FORMING AND INSERTING DEVICE Filed nec. a. 1962 4 Sheets-Sheet 1 April 27, 1965 D. BOYNTON ETAL 3,180,550

FASTENER PORMING AND INSERTING DEVICE 4 Sheets-Sheet 2 Filed DSC. 5,- 1962 NVE'NTORS IHA D. BOYNTON AWBREY C. LAWS 4 Sheets-Sheet 3 K B1G-' '7 April 27, 1965 Filed DBC. 3, 1962 April 27, 1955 1. D. BoYNToN ETAL 3,180,550

FASTENER FORMING AND INSERTING DEVIECE m ae Harney United States Patent Office 3&8955@ Patented pr. 27, i935 3,l'3},550 FASTENER FRML IG ANI) INSERTING DEVIQE Ira l). Boynton, Lexington, and Awbrey C. Laws, Boston, Mass., assigner-s, by mesne assignments, to United States teel Corporation, a corporation of New .lersey Filed Dec. 3, 1962, Ser. No. 241,879 6 Claims. (Cl. 227-93) rl'his invention relates to devices for forming and inerting fasteners, and more particularly to a portable hand tool which, from a supply of wire, will shear and drive fasteners as required.

It is a principal object of this invention to provide a device which, from a supply of wire, will form and drive fasteners as required.

It is a further object of this invention to provide a portable hand tool which both forms and inserts Wire fasteners as required.

Yet another object of this invention is the provision of an easily portable hand tool which will quickly and repetitively form and insert wire fasteners.

It is a more particular object of this invention to provide a portable hand tool which is supplied with a coil of Wire, and upon each actuation will shear a fastener from the wire and drive the sheared fastener.

Still a further more specific object of this invention is the provision of a hand tool which is supplied with a coil of wire, and which upon actuation will rst shear a fastener from the wire, and then insert the sheared fastener, and then return to a position ready to repeat the operanon.

Other objects and advantages of the invention will become apparent from the following description and accompanying drawings, in which:

FGURE l is a view of the device of this invention held in position for operation;

FIGURE 2 is an elevational view of the device on an enlarged scale from FIGURE 1 partially in section showing the parts within the housing;

FIGURE 3 is an enlarged View of a portion of the device of FIGURE 2;

FIGURE 4 is a sectional view taken along the center line of the device on its plane of symmetry;

FIGURE 4a is a sectional view of a portion of the device during operation after shearing the fastener;

FIGURE 5 is a View similar to FIGURE 4 showing the device as it has just completed its movement to drive a fastener;

FIGURE 6 is a View similar to FIGURE 2 showing the device after it has just completed its movement to drive a fastener;

FIGURE 7 is a View similar to FIGURE 6, the device being rotated 90;

FIGURE 8 is a perspective view of the wire feeding s ide;

FIGURE 9 is a perspective view of the Wire supporting yoke with the clamping spring attached thereto;

FIGURE l() is a view of a portion of the device during its return movement after driving the fastener;

FIGURE ll is a sectional View of the same portion of the device as FIGURE l0 taken along the center line of the device;

FIGURE l2 shows a modification of the device wherein locking cams are provided; and

FIGURE 13 is an enlarged detailed elevational View partially in section showing the operation of a portion of the wire feeding mechanism.

Referring now to FIGURE 1, the device of this invention is shown in normal horizontal position for use to fasten a strip of panel board B to a wooden stud S. It is with the tool in this position that the directions referred to hereinafter are oriented.

Referring now to FIGURES 2 through 4, the components of the device are shown, the device being in its retracted position ready to form and drive a fastener.

The device includes a block lll having at one end a support base l2. The block 10 has a cut out portion 14 adjacent the base 12 in which is disposed a wire support yoke L3. The yoke lo is mounted for pivotal movement in an arcuate groove 13 formed in the support base 12. A pair of longitudinally extending through bores 20 and 2?. are formed in the block lil, the bores terminating at the cut out portion ld. A shoulder 24 is formed on the block it) at the terminal end of the bore 20. A through longitudinal bore 26 is provided in the yoke 16 which is aligned with a bore Z8 in the support base 12 when the device is in the position shown in FIGURES 2-4. The yoke 16 has a pair of extensions 39 (FIGURE 9) which are disposed on opposite sides of the block 10, each having arcuate camming surfaces 31. A pair of cam levers 32 are pivotally mounted on pins 34 on opposite sides of the block It), and each is provided with a forward camming surface 3e and a rearward camming surface 38. The forward surfaces 36 are operable against the extensions 3@ of the yoke I6.

A pair of cam rods itl are slidably mounted on opposite sides of the block lil, and each is connected to a cylindrically-shaped drive member 42 by a retaining pin d3. The cam rods d@ each have upper camming surfaces i4 which are operable against the arcuate surfaces 3l on the yoke extensions 36 and against the rear camming surfaces 38 of the cam levers 32. The drive member 42 has extending therefrom a plunger 4o which extends into the longitudinal bore 22. Each of the cam rods 46 is provided with a generally Z-shaped camming member 48 pivotally mounted on a pin 50. The members 4S each have an upper camming surface S2 and a lower engaging surface 54. The upper camming surfaces are positioned to co-act with camming shoulders 55 on block l@ and springs Se bias the camming members 4% to urge the lower engaging surface 54 into grooves 57 formed in the block 1i).

The wire feeding mechanism includes a slide member 58 slidably mounted in a slot 59 on the block itl. The slide member S8 has a tube di) extending rearwardly therefrom, and has a bore 63 which slidably engages a tube 6l extending rearwardly from bore Ztl. The tube 6b extends into a bell-mouthed bore S2 formed in the drive member 42. The slide member S8 is provided with a notch ed in which is disposed a pivotally mounted locking collar d6 (FGURES 8 and 13), The collar d5 has an annular tungsten carbide insert 63, the opening of which is aligned with both the tubes 6) and 6l. A biasing spring 69 normally urges the collar d5 rearward toward the tube 6?. A key 'lil is mounted transversely on the slide member 58 in key slot 72 and the opposite ends thereof extend into grooves 57. Thus, the ends of the key 7d are positioned to co-act with the lower engaging surfaces S4 of the camming member d. Coil springs and 7S surround respectively the plunger dei and the tube 6) normally biasing the drive member 42 and block lit apart. A wire retaining clamp Si?, in the form of a leaf spring is mounted on the yoke :lo and has a projection 82 located adjacent the shoulder 24.

The barrel and drive members are enclosed by a pair of telescoping tubes 34 and Se, with tube 84 being secured to the block It) by set screws 3S and the tube 86 being secured to the drive member 2 by set screws 9d. A synthetic rubber handle 92 is moulded onto the tube 86 to provide for gripping of the device. The remote end of the tube 85 flares outwardly to a circular rim 9d which is adapted to peripherally embrace a cylindrical with bore 23 in the base.

cartridge 95 of wire W. An annular clamp is provided to secure the cartridge in place by clamping over the cartridge 9o and engaging the rim 94. The wire W feeds from the end of the cartridge through the tube into the bell mouthed bore d2 in the drive member, through tube 6l) to the slide member SS, through the collar 65, thence through tube 6ft to bore 2d and from bore Ztl into the bore 2d of the yoke le when the yoke is in the position shown in FlGURES 2 4. Each of the bores Zd, 22, 26 and 28 are slightly larger than the wire which the device uses to form the fasteners. A synthetic rubber cap g3 is placed on the base l2 and has a Operation and the v will be referred to as forward movement and movement of the drive member away from the block will be referred to as return movement. During thev forward movement the upper surfaces of the cam rods du will disengage the rear caniming surfaces of the cam members 32 n and will engage the arcuate cam'surfaces 3l of the yoke extensions 3G. This will cause the yoke to pivot from its position as shown in FIGURE 3 to the position shown in FGURE l0. As the yoke pivots, the wire is sheared against theV edge of the shoulder 24, thus providing a length of wire in the bore 25 of the yoke. This length of wire is the fastener. The cam rods iti will continue bore aigned reopen the bias of the springs 56 thus raising their lower engaging n surfaces dal outV of contact with the key "l, When the camming members ed disengage the key 'd the force of spring 78 which has been maintained under compresf sion by the rearward movement of the slide 58 will tend moving the yoke until the bore therein is aligned with the bore 22 in the block. Y Also, movement of the yoke will force the projection 82 of the' clamp de against the sheared end of the wire firmly holding it against the shoulder 2li. Movement of the drive member d2 will also move the plunger le in the bore 22, and the length of the plunger i6 is selected so that it will not project? y from the bore 22 until the bore Zdin the yoke lo' has been moved into alignment with the bore 22. Theiend of theft ject slightly beyond the face ofthe cap when the drive member has moved to its fully forward position with theend of cam rods abutting the disc. in this fully forward position the camming members 4S have cammed over the to its original position.

locking members ldd.

to drive the slidetoward the support base f2. this movement of the slide will cause the collar de to pivot to a position intermediate its rearmost position and the positionshown in full lines, this being the position shown in chain lines in FGURES ll and i3 which will cause the carbide insert to grip the wire and urge it forward toward the support base. Shortly after the camming members y release the slide, the upper camming surface dft of the cam bars engage Vthe rear cam surfaces 38 of the cam levers 32 causing the cam levers 32 to pivot about pins 34. During this pivoting movement of the cam levers 32,'

the front cam surfaces 35 thereof pivot the yoke lo back This will release the clamp Se from the wire, and whenthe bore Zriof the yoke if? comes into alignment with the bore Zd, the slide will be driven toward the support base bythe spring '73 carrying with it the gripped wire. Thus, when thev device has returned 4to its original position the wire will have Vbeen fed into the yoke ready to be sheared to a fastener.

lt will be readily apparent that the length of the fastener formed will depend upon the distance of movement of the slide V58 Iwhen feeding the Wire. The distance of movement of the slide is dependent upon the relative positions of the camming surfaces 4d and the camming members 43. The greater the distance that the camming member moves the slide during theY return lmovement the greater will be the length of wire fed to the yoke.

The modification ofthe device shown in FGURE l2 has'provided on the cam rods (one of Vwhich is shown) Each locking member liti@ is mounted for Ypivotal movement onta pin 162 and. biased by a` spring lud. The locking l .embers lieti each have a forward locking surface M56 which Vis positioned to abut a co-acting surface ltl formed on the block l@ at the end of groove 57. When the device is in Iits normal keyr'ti and the lower engaging surface 54 thereof is y engaging the key 70. yThis fullytforward position is shown in FIGURES 5, 6 and 7. VWhen this position has beenY reached, alength of Wire has been sheared to form a fastener and the fastener has been driven into the board. When pressure is released from the handle, the device will return to its normalrposition and in returning will advance the wire to a position ready to shear the next fastener. When pressure is removed from vthe handle i the spring 76 which Vwas compressed between the drive the `'slide 58 rearwardly away from the supportV base l2. Y.

position, ready for use, with the wire having'been fed by the slide to the yoke, the key 'lll pivots theloclring member against the 4biasing of springs lli/i to raise their forward surfaces 1% above the co-acting surfaces '1% Y and Vthus allowV the cam Vbars free forward movement along the block lll. If, however,la malfunction should occur, and for Vsome reason the slide should not feed the Wire into theyohe and hence remain in its rearward position, the Vkeyf'u would'be back in the position shown in chain Y lines in FIGURE 12.

in this position the `springs illwould bias the locking surfaces lilo of the locking members lo@ against Vco-acting surfaces M93 on the block.Y In this position any attempted forward movement .of the cam bars would be blocked by the co-actmg locking Y surfaces 1G26 and 108 and operation of the device would be preventedV until the malfunction is corrected.

While one embodiment of our invention has been shown and described it will'be apparent that-other adaptations and modifications may be made without departing from Vthe scope of the following claims.`

VIe claim: Y 4 I 1. ApparatusV for forming and inserting wire fasteners comprising, aV frame .member and a drive member,

' said frame member having an end cap, `said cap having a through axial bore, a support yoke pivotally mounted on saidY end cap and movable Yfrom a wirerreceiving po-V sition to a fastener inserting position, said yoke having a bore aligned with the bore in said cap, Asaid frame member having a rst longitudinal bore aligned with the bore in said yoke when the yoke is in the wire receiving position and adapted to guide the wire into the bore of the yoke, and a second longitudinal bore aligned with the bore of said yoke when the yoke is in the fastener inserting position, a pair of cam .bars carried by said drive member and slidably mounted on said frame member to move said yoke from said wire receiving position to said fastener' .inserting position when the drive member is driven toward said frame member, cam means coactable with said cam bars and said yoke to move said yoke back to the wire receiving position when the drive 'member is moved away from said frame member, said frame member including a shearing surface positioned to shear the supported end of the wire as the yoke moves from the wire receiving position to the fastener inserting position, a plunger carried by said drive member and extending into said second longitudinal bore in the frame member, said plunger being reciprocally movable into the bore of said yoke when the drive member is driven toward the frame member to eject the sheared fastener from said yoke bore and retractable from said bore in the yoke when said drive member is moved away from said frame member, said cam bars being positioned to maintain said yoke in the fastener inserting position until the plunger is retracted from said yoke bore, a wire feeding slide slidably mounted on frame member for movement toward and away from said cap and adapted to feed wire to said iirst longitudinal bore in said frame member, said slide including a pivotally mounted gripping collar adapted to grip and move a wire when moving in a direction toward said cap and to override the wire when moving away from said cap, and key means coactable lwith said cam bars and said slide to move said slide away from said cap for a predetermined distance and then release said slide when said drive member is moved away from said frame member, first spring means normally urging said drive member away from said frame member, second spring means normally urging said slide toward said cap, and handle means mounted on said drive member.

2. Apparatus for forming and inserting wire lfasteners comprising a frame member, a support yoke pivotally mounted on said frame member adjacent the forward end thereof and movable between a wire receiving position and a fastener inserting position, said yoke having a through longitudinal 'bore adapted to provide columnar support -to the end portion of a length of wire, a longitudinal reciprocating drive member movable between rear- Ward and forward positions, means actutable by said drive member on its forward movement for moving said yoke to said fastener inserting position, said frame member having a shearing surface positioned to shear the end portion of the wire to form a fastener as the yoke moves from the wire receiving position to the fastener inserting position, a rod carried b y said drive member for forcing the fastener from said yoke when the drive member is moved forwardly, means to feed the end of a length of Wire to said support means when it is in the wire receiving position, and means actuatable by said drive member on its rearward movement to return the yoke to its wire receiving position and then actuate said wire feeding means to feed the length of wire into the bore of said yoke.

3. Apparatus for forming and inserting wire fasteners according to claim 2 including a clamp mounted on said yoke, said clamp preventing forward movement of the length of wire when the yoke is in fastener inserting position.

4. Apparatus for forming and inserting wire fasteners comprising a frame member, a support yoke pivotally mounted on said frame member adjacent the forward end thereof and movable between a wire receiving posasso sition and a fastener inserting position, said yoke having a through longitudinal bore adapted to provide a columnar support to the end portion of a length of Wire, a longitudinal reciprocating drive member movable between rearward and forward posit-ions, means aetuatable by said drive member on its forward movement for moving said yoke to said fastener inserting position, said frame member having a shearing surface positioned to shear the end portion of the wire to form a fastener as the yoke moves from the wire receiving position to the fastener inserting position, said frame member having a first longitudinal bore aligned with the bore in said yoke when the yoke is in the wire receiving position and adapted to guide the lwire into the bore of the yoke, and a second longitudinal bore aligned with the bore of said yoke when the yoke is in the fastener inserting position, a rod carried by said drive member for forcing the fastener from said yoke when the drive member is moved forwardly, and means actuatabie by said drive member on its rearward movement to return the yoke to its wire receiving position and then actuate said wire feeding deans to feed the length of wire into the bore of said yoke.

5. Apparatus for forming and inserting wire fasteners according to claim 4 including a clampl mounted on said yok said clamp preventing forward movement of the length of wire `when the yoke is in fastener inserting position.

6. Apparatus for forming and inserting Wire fasteners comprising a frame member, a support yoke pivotally mounted on said frame member adjacent the forward end thereof and movable between a Wire receiving .position and a fastener inserting position, said yoke having a through longitudinal bore adapted to provide columnar support to the end portion of a length of wire, a pair of cam bar-s carried by said drive member and slidab'ly mounted on said frame member to move said yoke from said wire receiving position to said fastener inserting position when the drive member is driven toward said frame member, cam means co-actable with said cam bars and said yoke to move said yoke back to the wire receiving position when the drive member is moved away from said frame member, sai-d frame member including a shearing surface positioned to shear the supported end of the wire as the yoke moves from the wire receiving position to the `fastener inserting position, a plunger carried by said drive member, said plunger being reciproc-ally movable into the bore of said yoke when the drive member is driven toward the frame member to eject the sheared fastener from said yoke bore and retractable from `said bore in the yoke when said drive member is moved away from said frame member, said cam bars being positioned to maintain said yoke in the fastener inserting position' until the plunger is retracted from said yoke bore, a wire feeding slide slidably mounted on frame member for movement toward and away from said cap and adapted to feed wire to said bore in said yoke, said slide including a pivotally mounted gripping collar adapted to grip and move a wire when moving in a direction toward said cap and to over ride the wire when moving away from said cap, key means coactable with said cam bars and said slide to move said slide away from said cap for a predetermined .distance and then release said slide when said drive member is moved away fromfsaid frame member, lirst spring means normally 'urging said drive member away from said frame member, and second spring means normally urging said slide toward said cap.

GRANVILLE Y. CUSTER, I R., Primary Examiner.

Claims (1)

1. APPARATUS FOR FORMING AND INSERTING WIRE FASTENERS COMPRISING, A FRAME MEMBER AND A DRIVE MEMBER, SAID FRAME MEMBER HAVING AN END CAP, SAID CAP HAVING A THROUGH AXIAL BORE, A SUPPORT YOKE PIVOTALLY MOUNTED ON SAID END CAP AND MOVABLE FROM A WIRE RECEIVING POSITION TO A FASTENER INSERTING POSITION, SAID YOKE HAVING A BORE ALIGNED WITH THE BORE IN SAID CAP, SAID FRAME MEMBER HAVING A FIRST LONGITUDINAL BORE ALIGNED WITH THE BORE IN SAID YOKE WHEN THE YOKE IS IN THE WIRE RECEIVING POSITION AND ADAPTED TO GUIDE THE WIRE INTO THE BORE OF THE YOKE, AND A SECOND LONGITUDINAL BORE ALIGNED WITH THE BORE OF SAID YOKE WHEN THE YOKE IS IN THE FASTENER INSERTING POSITION, A PAIR OF CAM BARS CARRIED BY SAID DRIVE MEMBER AND SLIDABLY MOUNTED ON SAID FRAME MEMBER TO MOVE SAID YOKE FROM SAID WIRE RECEIVING POSITION TO SAID FASTENING INSERTING POSITION WHEN THE DRIVE MEMBER IS DRIVEN TOWARD SAID FRAME MEMBER, CAM MEANS COACTABLE WITH SAID CAM BARS AND SAID YOKE TO MOVE SAID YOKE BACK TO THE WIRE RECEIVING POSITION WHEN THE DRIVE MEMBER IS MOVED AWAY FROM SAID FRAME MEMBER, SAID FRAME MEMBER INCLUDING A SHEARING SURFACE POSITIONED TO SHEAR THE SUPPORTED END OF THE WIRE AS THE YOKE MOVES FROM THE WIRE RECEIVING POSITION TO THE FASTENER INSERTING POSITION, A PLUNGER CARRIED BY SAID DRIVE MEMBER AND EXTENDING INTO SAID SECOND LONGITUDINAL BORE IN THE FRAME MEMBER, SAID PLUNGER BEING RECIPROCALLY MOVABLE INTO THE BORE OF SAID YOKE WHEN THE DRIVE MEMBER IS DRIVEN TOWARD THE FRAME MEMBER TO EJECT THE SHEARED FASTENER FROM SAID YOKE BORE AND RETRACTABLE FROM SAID BORE IN THE YOKE WHEN THE SAD DRIVE MEMBER IS MOVED AWAY FROM SAID FRAME MEMBER, SAID CAM BARS BEING POSITIONED TO MAINTAIN SAID YOKE IN THE FASTENER INSERTING POSITION UNTIL THE PLUNGER IS RETRACTED FROM SAID YOKE BORE, A WIRE FEEDING SLIDE SLIDABLY MOUNTED ON FRAME MEMBER FOR MOVEMENT TOWARD ANY AWAY FROM SAID CAP AND ADAPTED TO FEED WIRE TO SAID FIRST LONGITUDINAL BORE IN SAID FRAME MEMBER, SAID SLIDE INCLUDING A PIVOTALLY MOUNTED GRIPING COLLAR ADAPTED TO GRIP AND MOVE A WIRE WHEN MOVING IN A DIRECTION TOWARD SAID CAP AND TO OVERRIDE THE WIRE WHEN MOVING AWAY FROM SAID CAP, AND KEY MEANS CO-ACTABLE WITH SAID CAM BARS AND SAID SLIDE TO MOVE SAID SLIDE AWAY FROM SAID CAP FOR A PREDETERMINED DISTANCE AND THE RELEASE SAID SLIDE WHEN SAID DRIVE MEMBER IS MOVED AWAY FROM SAID FRAME MEMBER, FIRST SPRING MEANS NORMALLY URGING SAID DRIVE MEMBER AWAY FROM SAID FRAME MEMBER, SECOND SPRING MEANS NORMALLY URGING SAID SLIDE TOWARD SAID CAP, AND HANDLE MEANS MOUNTED ON SAID DRIVE MEMBER.

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