US2082852A - Nail-transferring device - Google Patents

Description

J. F. STANDISH 2,082,852

NAIL TRANSFERRING DEVICE June 8, 1937.

Filed Sept. 20,1935

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34 l/E/VTUQ fdM Patented June 8, 1937 UNITED STATES NAIL-TRANSFERRING DEVICE Application September 20, 1935, Serial No. 41,428

19 Claims.

This invention is concerned with nail-transferring devices, and especially with those employed for delivering nails or like fastenings to the inserting mechanisms of heel-attaching machines.

In apparatus for securing heels to shoes, the attaching nails are commonly delivered to the work-supporting jack by a horizontally movable loader having a block provided with passages to which said nails are supplied by hand or by an automatic distributor. The loader may be carried from a nail-receiving position to a naildelivering position either manually or automatically, its extremes of movement being determined by stops. Whatever the manner of actuation, the loader may strike its stops with considerable force. At the jack, the shock produced by this abrupt stopping of the loader tends to disturb the contained nails. It may be so great that they are thrown'from the passages, and not infrequently they are inverted, so they rise and then fall again into the passages. In the first instance, the machine will operate without the insertion of a portion of the nails, or all may be lost. In the second, the nails, driven heads first, are crippled. In either case, the operation must be repeated, there being a loss of both time and material. An object of my invention is to guard against such occurrences and to insure the accurate delivery of the transferred nails to the jack.

In achieving this object, I combine with such a movable nail-transferring or -delivering device as a loader-block having nail-holding passages opening through its opposite faces, means carried by the block for closing both ends of the passages. Herein is disclosed nail-retaining means movable at opposite sides of the block during the movement of said block into nail-delivering position. The retaining means may be in the form of sliding or otherwise movable shutters. The one at the underside will support in the passages nails which have been supplied tothem, as through the foot-plate-openings of a nail-distributor, and then release these at the jack to be received in the driver-passages thereof. The upper shutter may be normally opened to admit the supply of nails, but will be closed upon leaving the distributorto be opened only upon return thereto, so that, during the transfer, the nails will rest in closed chambers. The closure at the upper ends of the passages being maintained at the time the loader is stopped at the jack, the previously-mentioned diiiiculties of displacement cannot occur. Between the oppositely sliding shutters, I prefer to use a single spring which holds them yieldingly in their normal relation, this spring conveniently being contained in a chamber in the block. The time of action of both shutters is controllable separately, to render certain the correct opening of the passages. A very effective arrangement for opening a shutter, herein shown in connection with that through which delivery is made to the jack, is a contact member in the form of an eccentric rotatable in the shutter and having means for fixing it in different angular positions. To furnish a continuation of the nail-holding passages which will tend to guide effectively the nails into the jack, the lower nail-delivering shutter is relatively thick and has passages which become alined with the jack-passages. Further, to insure substantial continuity of the compound nail-delivering passages, the underside of the lower shutter of the block has a transversely curved groove corresponding to the form of the jack-top. Therefore, the loader and jack may closely co-operate for the delivery of the nails to the latter. The upper shutter, having no critical guiding function, may be light and thin.

In the accompanying drawing is shown one of the several possible forms which my invention may assume,

Fig, 1 illustrating my improved transferring or loading device in broken side elevation and in nail-delivering relation; 7

Fig. 2 is a similar View of the device in nailreceiving relation;

Fig. 3 is a top plan view of the device, and i Fig; 4 is an enlarged sectional perspective of said device in a position corresponding to that of Fig. 2. a I a At D appears the lower portion of a nail-distributor and at J a work-supporting jack-post of a heel-attaching machine. Through tubes IU of the distributor nails are delivered in successive loads, to be temporarily supported upon a shutter l2 sliding upon a foot-plate It in openings in which the tubes terminate. In the shutter are openings l5 normally aline-d with the footplate-openings but carried out of registration therewith after a load has been supplied. The jack J. has a convexly curved top l6 upon which the work is supported. Through thejack-top open passages 18 and in these operate reciprocatory nail-drivers 20. A nail-loader L is movable between the distributor and the jack to transfer a load of nails for each heel-attaching operation. The general arrangement may be as in Letters Patent of the United States No. 1,947,-

770, MacKenzie, February 20, 1934, the loader similarly moving between its terminal-points under the influence of a horizontally reciprocating bar 22.

5 Considering my improved loading device, the bar 22 carries at one side a frame 24 having a rectangular opening by which a block 25 is re ceived. Flanges at the opposite sides of the block rest upon the frame and accidental upward displacement is prevented by spring-actuated latches 28, 28, which engage depressions in the ends of the block near its opposite corners, holding it securely against tilting. Through the block are vertical passages 30, they agreeing, as

do also the openings through the foot-plate l4 and the jack-passages l8, with the particular nailing design which is being used. At the opposite sides of the lower face of the block are rectangular ways 32, in which slides a nail-supporting shutter 34. In the shutter are openings 36 corresponding to the block-passages. This shutter is relatively thick and is grooved from front to rear, the transverse contour at 3'? being that of the jack-top l6. Into the groove, the

openings 36 lead. The shutter-openings, when 'alined with the passages 36 for the delivery of the nails, provide continuations of them, furnishing practically unbroken lateral guides for the nails until they enter the jack-passages l8, since there is but slight clearance between the convex jacktop and the complementally curved shutter-face. At the upper face of the block at its opposite sides, there are dovetail ways 38 to receive a comparatively thin, light, nail-retaining shutter 40,

openings 32 in which may be brought into and out of alinement with the block-passages. The shutters 34 and 3B are normally held yieldably at points determined by the engagement of shutter-surfaces M and 46, respectively, with the opposite extremities of the block, by an ex pansion-{spring 48 common to both shutters. From these points, said shutters are oppositely movable. This spring is contained in a chamber furnished by a horizontal bore through one extremity of the block, the opening of the bore being closed by a plate 58 fixed to the shutter 34 and against which the spring abuts. The opposite extremity of the spring contacts with a depending portion 5! of a piece 53 secured on and extending beneath the shutter 40, it being movable along a slot opening through the block into the chamber. Normally, the shutter 39 being open, the spring holds the shutter 34 closed. To cause the openings 42 in the shutter do to register accurately 55 with the openings l5 of the shutter H2 at the footplate and with the block-passages 3t when the loader is at its rearward nail-receiving position, and yet to be closed by the spring 18 as soon as the loader starts forward, a screw 52 is threaded horizontally through a lug 5 t rising from the forward extremity of the shutter-piece 53. This screw contacts with the foot-plate as the loader moves beneath it, and, at a time determined by the adjustment of the screw, the vertical alinement of the openings is efiected. In the opposite or forward extreme of travel of the loader, the normally closed shutter 34 is opened by contact of a projection 56 therefrom with the jack J. To correctly time the movement of the shutter 3G with the arrival of the block-passages 30 over the jack-passages E8, the projection 5'0 is preferably in the form of an eccentric depending from an enlarged shank 58 rotatable in the shutter. The eccentric is variable as to its angular relation by being turned about the axis of its shank, it being fixed at the chosen point by a clamping bolt 69]. The portion of the eccentric which engages the jack will enable the operator to cause the shutter-openings i2 and the blockand jack-passages to be alined simultaneously.

At the beginning of a nail-supplying cycle, the loader L will be beneath the foot-plate I4 (Figs. 2 and 4), with the openings 42 of its shutter 40 held open by the contact of the screw 52 with the foot-plate, the compressed spring 48 maintaining the shutter 34 closed. The block-passages 30, the shutter-openings d2, the distributor-tubes l8 and the openings E5 in the foot-plate-shutter l2 are all alined, the last-mentioned shutter being opened by a spring 62, as in the previouslymentioned patent. The shutter 34 is supporting a load of nails N in the passages 3i), supplied during the previous cycle. In the initiation of nail-delivery by the operator, the bar 22 travels forward advancing the block 26. The footplate-shutter i2 is at once closed by a link 64, similarly to the MacKenzie organization, the openings l5 moving away from the ends of the distributor-tubes it) so it is ready for the reception of the succeeding load of nails. The shutter 9 is now closed by the spring '48, said spring acting also to hold the shutter 3 3 closed. Consequently, the entire load of nails is resting secure against displacement in completely closed chambers in the block. As the loader is stopped by engagement with the jack, the shutter 34 is opened by the contact of its eccentric 56 therewith, and both the shutter-openings 36 and the block-passages Bil are brought into simultaneous registration with the jack-passages E8. The nails are therefore delivered to the jack, the openings in the thick shutter terminating in the groove 3'! closely fitting the jack-top l6 furnishing almost unbroken conduits to guide the nails. Be-

cause of the closure of the shutter 40 at this time, the nails cannot be thrown upwardly from the loader-passages. Delivery to the jack having been thus accomplished, the bar returns the loader to its initial position. The shutter 34 is closed by the spring 38 upon leaving the jack, and upon arrival at the foot-plate of the distributor, the shutters at] and I2 are opened, the nails on the latter falling upon the now closed shutter 3 and terminating the nail-supplying and -delivering cycle.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a nailing machine, a loader-block movable to deliver nails for their insertion in the Work and provided with passages for holding the nails, said passages opening through opposite sides of the block, and movable means at such opposite sides of the block for temporarily retaining the nails in the passages during the movement of said block into nail-delivering position.

2. In a nailing machine, a loader-block movable to deliver nails for their insertion in the work and provided with passages for holding the nails, said passages opening through opposite sides of the block, means movable at such opposite sides of the block for temporarily retaining the nails in the passages, and means common to the two retaining means for maintaining them in their normal positions.

3. In a nailing machine, a loader-block movable to deliver nails for their insertion in the work and provided with passages for holding the nails, said passages opening through opposite sides of the block, movable means at such opposite sides of the block for temporarily retaining the nails in the passages during the movement of said block into nail-delivering position, means for moving the retaining means, and means arranged to separately vary the time of actuation of the retaining means.

4. In a nailing machine, a loader-block mov able to deliver nails for their insertion in the work and provided with passages for holding the nails, said passages opening through opposite sides of the block to receive nails at one end and deliver them at the other, and means movable at the receiving ends of the passages to close said passages after the reception of the nails and to maintain the closure throughout the nail-delivering travel.

5. In a nailing machine, a ioader-block movable to deliver nails for their insertion in the work and provided with passages for holding the nails, said block having pairs of ways at opposite sides of the block, and nail-retaining shutters movable with the block and in opposite directions in the pairs of ways thereon.

6. In a nailing machine, a loader-block movable to deliver nails for their insertion in the work and provided with passages for holding the nails, said passages opening through opposite sides of the block to receive nails at one end and deliver them at the other,'and a nail-retaining shutter movable with and upon the block across the passages at each side of said block, the shutter at the nail-receiving side being light and thin and the shutter at the nail-delivering side being relatively thick and having passages for alinement with the block-passages.

7. In a nailing machine, a loader-block movable to deliver nails for their insertion in the work and provided with passages for holding the nails, said passages opening through opposite sides of the block to receive nails at one end and deliver them at the other, and a nail-retaining shutter movable with and upon the block across the passages at each side of said block, the shutter at the nail-receiving side being light and thin and the shutter at the nail-delivering side being relatively thick and having passages for alinement with the block-passages, the nail-delivering shutter being provided with a transversely curved groove into which the passages open.

8. In a heel-attaching machine, a nail-distributor, a work-supporting jack, a loader-block movable between the distributor and jack and provided with nail-holding passages connecting its upper and lower faces, and shutters movable with and upon the block across the opposite ends of the passages.

9. In a heel-attaching machine, a nail-distributor, a work-supporting jack, 2. loader-block movable between the distributor and jack and provided with nail-holding passages connecting its upper and lower faces, shutters movable upon the block across the opposite ends of the passages, and a spring contacting with both shutters.

10. In a heel-attaching machine, a nail-distributor, a work-supporting jack, a loader block movable between the distributor and jack and provided with nail-holding passages connecting its upper and lower faces, shutters movable upon the block across the opposite ends of the passages, and a member variable in position upon each shutter, the members being arranged for respective contact with the distributor and jack.

11. In a heel-attaching machine, a nail-distributor, a work-supporting jack, a loader-block movable between the distributor and jack and provided with nail-holding passages connecting its upper and lower faces, and a shutter movable with and upon the block across the upper ends of the passages.

12. In a heel-attaching machine, a nail-distributor, a jack having a transversely curved work-supporting top, a loader-block movable between the distributor and jack and provided with nail-holding passages connecting its upper and lower faces, and a shutter movable upon the block across the passages and having its lower face transversely curved to generally correspond to the jack-top, the passage-walls furnishing practically continuous lateral guides for the nails in their travel between the distributor and the jack.

13. In a nail-transferrng device, a block having nail-holding passages, two shutters controlling the passage-openings, and a spring acting upon the shutters.

14. In a nail-transferring device, a block having nail-holding passages connecting its upper and lower sides and a chamber between its'opposite ends, two shutters movable upon the block to control the passages, and a spring situated in the chamber and exerting its expansive force upon both shutters.

15. In a nail-transferring device, a block having nail-holding passages connecting its upper and lower sides and a chamber between its opposite ends, a passage-controlling shutter movable upon the block, and a spring contained in the chamber and acting upon the shutter to hold it normally closed.

16. In a nail-transferring device, a block having nail-holding passages connecting its upper and lower sides and a chamber between its opposite ends, a passage-controlling shutter movable upon the block, the shutter having a projection extending over one end of the chamber, and a spring in the chamber contacting with the shutter-projection.

17. The combination with a loader-block having a nail-holding passage, of a passage-controlling shutter movable upon the block, an eccentric rotatable upon the shutter and arranged for contact with a relatively fixed member to actuate said shutter, and means arranged to secure the eccentric in difierent angular positions.

18. In a heel-attaching machine, a jack, a loader-block movable into nail-delivering relation to the jack, a nail-retaining shutter movable upon the loader-block, and a rotatable eccentric projecting from the shutter for contact with the jack.

19. In a nail-transferring device, a block having nail-holding passages opening through it and being movable between nail-receiving and naildelivering positions, and means carried by the block for closing both ends of the passages.

JOHN F. STANDISH.

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