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Publication numberUS2800668 A
Publication typeGrant
Publication dateJul 30, 1957
Filing dateOct 28, 1955
Priority dateSep 19, 1952
Publication numberUS 2800668 A, US 2800668A, US-A-2800668, US2800668 A, US2800668A
InventorsJohn H Friedman
Original AssigneeNat Machinery Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Nail ejector means in a nail making machine
US 2800668 A
Abstract  available in
Images(2)
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Claims  available in
Description  (OCR text may contain errors)

July 30, 1957 J. H. FRIEDMAN 2,,6

NAIL EJECTOR mms m A mm, MAKING momma original Filed Sept. 19', 2 SheetS -Sheet i IN V EN TOR. TOH/V- H. FE/EDNAN BY RIC/15K WA 77's,:0GEETOA/4MmE/VM J. H. FRIEDMAN IN A NAIL MAKING MACHINE 2 Sheets-Sheet 2 July 30, 1957 NAIL EJECTOR MEANS N U 4 INVENTOA. JOHN H- FRIEDMAN M- /VE/VN) u A I f BY RICHEWTS EDGEETDNJ United States Patent NAIL EIECTOR MEANS IN A NAIL MAKING MACHINE 310,461. Divided and this application October 28, 1955, Serial No. 543,352

6 Claims. (Cl. 10-43) This invention relates to a machine for making nails and more particularly, to that machine wherein wire stock is progressively advanced by the stock gripping dies, headed and further advanced and cut and ejected from the machine. Reference is made to my co-pending application Serial No. 310,461, filed September 19, 1952, of which the instant application is a division.

More specifically, it is an object of the present invention to provide a nail machine having an improved nail ejecting means operating in timed relation with the header slide.

Another object is to provide an ejector means spring loaded by engagement with an uncut nail to eject said nail as soon as it is cut from the wire stock.

Further objects and advantages of my construction will appear as the detailed description of my invention proceeds and with the explanation of the appended drawings wherein:

Fig. 1 is an elevation with parts in section showing the nail ejector and the drive therefor; and

Fig. 2 is a plan view of the nail ejector apparatus and drive therefor.

As will be understood by those skilled in the art, the nail machine includes a reciprocating header slide 32 driven by a crankshaft which header slide upsets a head on the end of the wire stock fed into the machine. The stock is thereafter advanced by the feed mechanism (not shown) into alignment with co-operating cutters for cutting the wire stock and at the same time forming a point by the cutting operation after which the nail is ejected. For a more detailed description of the structure operation of the nail machine, reference is made to my co-pending application Serial No. 310,461, filed September 19, 1952.

As the nail machine disclosed in said c-o-pending application is capable of high speed production of nails, for example, more than one thousand per minute, a rate such that the nails do not fall by gravity after being cut in time to avoid contact with the header slide 32 at the next advance stroke. According to the present invention I have provided means to forcibly eject the cut nails from the path of the header slide faster than the cut nails would fall free. Such ejection insures that the cut nails will be out of the way of the header slide immediately following the cutting operation. To achieve this new result, I provide the apparatus shown in Figs. 1 and 2 wherein a lever 20 is pivoted on the machine bed frame as at 21 and carries a roller 22 hearing against a cam 23 carried by the nail machine crankshaft. The upper end of the lever 20 is pivotally connected as at 24 to a longitudinally disposed rod 25 which passes through an apertured bracket 26 carried by the bed frame cap 27. A collar 28 is fixed to the rod and a spring 29 is arranged between the collar 28 and the bracket 26 so as to urge the lever 20 in a counterclockwise direction and cause the roller 22 to bear against the cam 23.

An arm 30 is pivoted to the forward end of rod 25 and the lower end of arm 30 is fixed to the right hand end of a transversely extending shaft 31. The other end of the shaft 31 is disposed above the header slide 32 and has fixed thereto a pair of longitudinally disposed flat arms 33 as viewed in Fig. 1, which support at their outer ends a vertically disposed tube 34. A support for the tube 34 includes a block 35 which is pivoted as at 36 to the outer ends of the flat arms 33. A shoulder 37 is fixed to the tube 34 and the tube 34 is urged downwardly into the pivoted block 35 by the spring 38 which is wound about a stub shaft 39, as best seen in Fig. 2, carried by a block 40 secured as at 41 to the transverse bracket which supports shaft 31. Since the axis of the stub shaft 39 is spaced vertically above the shaft 31 and is slightly forward of the shaft 31, the spring 38 in effect completes a parallel linkage guiding the plunger and tube assembly 42 and 34. Since the tube 34 is urged downwardly by the spring 38 and the plunger 42 within the tube is urged downwardly by the coil spring 43 with the tube, the nail ejector is adapted to eject nails of various sizes and hardness which ofier varying resistance to the ejection.

Upon oscillation of the lever 20 by the crankshaft cam 23, the tube 34 is raised and lowered with respect to the horizontal path of the header slide 32.

As shown in Fig. 1, the cam 23 raises the tube 34 out of the path of the header slide punch 32a during the heading operation of wire stock 44 held in gripper dies 45 and 46. Within the tube 34 is mounted a nail engaging plunger 42 which is mounted therein for limited reciprocating movement with respect to the tube. The plunger 42 is urged in a downward direction by the coil spring 43 within the tube. When the header slide is retracted and the stock advances into cutting position, the spring 29 causes the arms 33 and the tube 34 carried thereby to lower the plunger 42 into engagement with the uncut nail. In this last-named position, the spring mounting of the plunger 42 is such as to cause energy to be stored in said spring 43 with the result that the plunger 42 is urging the nail downwardly before the nail has been cut. The result of this arrangement is that as soon as the nail is severed by the knives, the nail is forcibly ejected downwardly by the plunger somewhat in the fashion of an arrow being shot from a how. The cam and lever arrangement is such that the plunger 42 is withdrawn as soon as the nail is ejected from the path of the header slide and the header slide may advance to head the next nail.

As will be understood by those skilled in the art, the wire stock 44 is advanced toward the retracting header slide 32 (after the heading blow) by feed means moving in timed relation to the header slide. It will also be understood that the uncut nail is severed from the Wire stock 44 by co-operating cutter knives (not shown) which are also moved in timed relation to the header slide.

Although I have described one form of my invention in considerable detail, it will be appreciated by those skilled in the art that numerous modifications may be made therein without departing from the scope and spirit of the invention as described in the following claims.

I claim:

1. A nail machine comprising a frame, a header slide mounted therein for reciprocation, a crankshaft to drive said header slide, nail ejector means comprising a lever pivoted on the bed frame, a cam roller on one end of said lever, a cam on the crankshaft arranged to bear against said cam roller, a transverse rockshaft mounted on the bed frame above the header slide, means operatively connecting said rockshaft to the other end of said lever, a plunger assembly carried by said rockshaft and adapted to be moved thereby into and out of the path of the header slide, means to maintain said plunger assembly in vertical alignment during movement, said plunger assembly including a spring pressed plunger adapted to bear against a headed nail prior to the nail being cut from the stock whereby as soon as a headed nail is severed from the stock the plunger projects the cut nail downwardly and the plunger assembly is thereafter rocked upwardly out of the path of the header slide.

2. A nail machine comprising a bed frame, a header slide mounted for horizontal reciprocation in the bed frame, a crankshaft for driving the header slide, a cam shaft fixed to said crankshaft, a lever pivoted on the frame, one end of said lever provided with a roller adapted to bear against said cam and the other end of said lever being operatively connected to a rockshaft, said rockshaft being mounted for oscillation on a horizontal axis parallel to the crankshaft, a supporting member fixed to and extending laterally from the rockshaft, a tube supported by the free end of said supporting memher, a vertically disposed plunger mounted in said tube, said plunger projecting downwardly from the tube and adapted when the lever is rocked to engage uncut nails in the machine, spring means urging the plunger downwardly, said spring means being loaded by engagement of the plunger with the uncut nail and ejecting the nail downwardly when the same is severed from the wire stock.

3. A nail machine comprising a bed frame, a header slide mounted for horizontal reciprocation in the bed frame, a crankshaft for driving the header slide, a cam shaft fixed to said crankshaft, a lever pivoted on the frame, one end of said lever provided with a roller adapted to bear against said cam and the other end of said lever being operatively connected to a rockshaft, said rockshaft'being mounted for oscillation on a horizontal axis parallel to the crankshaft, a supporting member fixed to and extending laterally from the rockshaft, a tube pivotally supported by the free end of said supporting member, means acting on said tube to maintain its vertical alignment, a vertically disposed plunger mounted in said tube, said plunger projecting downwardly from the tube and adapted when the lever is rocked to engage uncut nails in the machine, spring means urging the plunger downwardly, said spring means being loaded by engagement of the plunger with the uncut nail and ejecting the nail downwardly when the same is severed from the wire stock. t

4. A nail ejector for a nail machine having a frame and a header slide mounted therein for reciprocation driven by a crankshaft, said nail ejector comprising in combination, a rockshaft mounted for oscillation on a horizontal axis parallel to the crankshaft, a supporting member fixed to and extending laterally from the rockshaft, a tube pivotally mounted on the free end of said supporting member, means operative on said tube to maintain it in substantial vertical alignment, a plunger slidably mounted within the lower portion of said tube, means to "actuate said rockshaft in timed relation to said header slide reciprocation, said plunger projecting downwardly from said tube and adapted to engage uncut nails in the machine when the header slide had moved to its back center extreme of reciprocation, spring means urging said plunger downwardly, said spring means being compressed by engagement of the plunger as the tube is moved downwardly by the means to actuate said rockshaft, cutting means for severing said nail when said plunger is hearing down on said nail, whereby the severing of the nail by the cutting means allows the spring urged plunger to eject the nail forcibly downwardly.

5. An ejector for stock worked in a machine having a frame and a header'slide mounted therein for reciprocation driven by a crankshaft, said ejector comprising in combination, a rockshaft mounted for oscillation on a horizontal axis parallel to the crankshaft, a supporting member fixed toand extending laterally from said rockshaft, a tube member pivotally mounted on the free end of said supporting member, means engaging said tube to maintain the tube in substantial vertical alignment, a

. plunger slidably mounted within said tube, means to actuate said rockshaf t in timed relation to said header slide reciprocation, spring means within said tube adapted to urge said plunger downwardly of said tube, said spring means being compressed as the rockshaft moves the plunger into engagement with the stock while the stock is secured when'the header slide is withdrawn, means for releasing the stock with said plunger engaging said stock, whereby release of the stock allows the spring urged plunger to eject the stock forcibly away from the path of the header slide.

6. An ejector mechanism for forcibly ejecting stock from a machine having a frame and a header slide mounted therein for reciprocation driven by a crankshaft, said ejector mechanism including in combination, a rockshaft mounted for oscillation in timed relation to said header slide reciprocation, a supporting member fixed to and extending laterally from the rockshaft, a tube pivotally mounted on the free'end of said supporting member, resilient means engaging said tube and combined with said tube supporting member and rockshaft forms a substantially parallelogram-like linkage to maintain the tube in substantial vertical alignment, a plunger slidably mounted in said tube and extending therefrom, spring means within said tube adapted to urge said plunger downwardly of the tube, means to actuate said rockshaft in timed relation to header slide reciprocation, said plunger engaging the stock'by the actuation of said rockshaft and simultaneously compressing said spring means when the' header slide has withdrawn from the stock, releasing means for said stock, whereby said plunger under compressed spring actuation forcibly ejects said stock upon release of said stock after working.

References Cited in the file of this patent UNITED STATES PATENTS 319,485 Hassell June 9, 1885 1,969,390 Willard Aug. 7, 1934

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US319485 *Jun 9, 1885 hassall
US1969390 *Oct 8, 1932Aug 7, 1934Willard Storage Battery CoGrid trimming press
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4800746 *Oct 19, 1987Jan 31, 1989Frank PotucekMachine and method for making star shaped fasteners
US4833906 *May 11, 1988May 30, 1989Star Fasteners International, Inc.Machine for making star-shaped fasteners
Classifications
U.S. Classification470/121
International ClassificationB21G3/32, B21G3/18, B21G3/20
Cooperative ClassificationB21G3/32, B21G3/20, B21G3/18
European ClassificationB21G3/20, B21G3/18, B21G3/32