US2019573A - Fastening inserting machine - Google Patents

Description

Nov. 5, 1935- F. N. LA CHAPELLE FASTENING INSERTING MACHINE Filed Nov. 11, 1932 Patented Nov. 5, 1935 FASTENING INSERTING MACHINE Fred N. La Chapelle, Beverly, Mass, assignor to United Shoe Machinery Corporation, Paterson, N.'J., a corporation of New Jersey Application November 11, 1932, Serial No. 642,279

4 Claims. (01.. 1-30) This invention relates to fastening inserting machines and is illustrated herein as embodied in a machine: for inserting fibre pegs in the manufacture of boots and shoes.

In many fastening inserting machines, for example in those of the type disclosed in United States Letters Patent No. 1,849,253, granted March 15, 1932, on an application filed in my name, the driver bar is positively controlled throughout its entire cycle of operation by a closed cam. The configuration of the cam is such that the driver bar is first accelerated and then retarded so that as the driver bar nears the end of its driving stroke it is slowed up. Machines of the type referred to are in extensive use and operate successfully to insert fastenings in work pieces, such as shoes, but under certain conditions the fastenings, even though they are of sufficient length to pass through the stock, are not driven entirely through the work and against the bottom plate of a last or other means on which the shoe is supported. An object of this invention accordingly is to provide means for insuring that fastenings will be driven entirely through the work.

To this end, the driver bar of the illustrated machine, which constitutes a preferred embodiment of the invention, is capable of an appreciable amount of movement relatively to its operating mechanism and toward the work piece at the conclusion of the fastening inserting movement of said operating mechanism so that the momentum of the driver bar is utilized to complete the driving stroke. As illustrated, a toothed bar is mounted in a slot or recess in the driver bar, the length of the toothed bar being a little less than the length of said recess. The toothed bar is connected to the operating mechanism and is free to slide in the recess in said driver bar a distance equal to the difference in length between the recess and the toothed bar. Thus, when the reciprocating means nears the end of its driving stroke the driver bar, due to its momentum, continues its movement to insert the fastening and to drive the entering end of the fastening against the bottom plate of a last or other work support upon which the shoe may be mounted.

The novel features of the invention will now be more particularly described with reference to the accompanying drawing which shows a preferred embodiment of the invention and thereafter pointed out in the claims.

In the drawing,

Fig. 1 is a side elevation of a portion of a fastening inserting machine embodying the present invention at the conclusion of the fastening inserting stroke;

Fig. 2 is a detail view illustrating a preferred form of driver bar; and

Fig. 3 is a sectional view taken through the 5;

heel part of a shoe on a last showing a fastening inserted by the machine embodying the present invention.

Although the present invention is illustrated as embodied in a fastening inserting machine of the type disclosed in said United States Letters Patent No. 1,849,253, it should be understood that the invention may also be used in other types of fastening inserting machines.

The illustrated machine is provided with a head l5 H) which is mounted on a column (not shown). The column also carries a work support terminating in a last pin l2 arranged to support a work piece such as a shoe I 4 mounted on a last l6 with its sole l8 in engagement with a presser plate or abutment 20 carried by the head I 0 of the machine. The shoe l4 may be positioned relatively to the fastening inserting instrumentalities of the machine by a gage 22 also carried by the head l 0 of the machine. 5

A cam shaft 24 is mounted in suitable bearings in the head IQ of the machine and carries a cam member 26 provided with a series of cam surfaces and grooves arranged to operate the moving parts of the machine. The cam shaft 24 30 is driven from any suitable source of power through a clutch member (not shown) mounted on the cam shaft. The clutch member is provided with a brake surface which co-operates with a brake member to stop rotation of the cam shaft 2% in a manner common to machines of the type disclosed in said Letters Patent.

The machine is provided with a driver bar 34 mounted for reciprocation in vertical ways in the head I0 of the machine. The driver bar 34 is recessed at its rear face to receive a bar or connecting member 36 which is, for example, approximately one-sixteenth of an inch shorter than the length of the recess in the driver bar 34. The bar 36 is provided with teeth which engage teeth 38 on a segment 40 forming the end of a forwardly extending arm 42 of a bell crank lever 44. The other arm 48 of the bell crank lever 44 carries a cam roll which engages a cam groove 56 in the cam member 26 to reciprocate 50 the driver bar 34. A driver 52 is secured to the lower end of the driver bar 34 by a clamping device 56. In operation the driver bar 34 is forced downwardly by the bell crank 44 a predetermined distance and when the bell crank 44 has reached 55 the lowermost limit of its movement, the driver bar 34, because of its momentum, continues its downward movement a distance equal to the difference in length between the recess in the driver bar 34 and the bar 36. This continued movement of the driver bar 34 and the driver 52 imparts a hammer blow to a fastening 56 and not only drives the entering end of the fastening 56 through the shoe and against the metal bottom plate of the last it but heads the other end of the fastening, as shown best in Fig. 3.

Fastenings may be supplied to the machine in any desired manner. Thus the illustrated machine is provided with a bell crank lever 51 connected at one end to a sliding block 58 and at its other end to a link 60 which, together with feeding dogs and the mechanism for automatically varying the length of feed of the fastening material, forms a part of the mechanism for feeding fastening material to the fastening inserting instrumentalities of the machine as i1- lustrated in the Letters Patent hereinbefore referred to. As is common in machines of this type, the machine is provided with an awl which forms a fastening receiving hole in the work piece and then feeds the work to bring the fastening receiving hole in the work piece into alinement with the driver 52. The awl and work feeding mechanism are not shown herein but are clearly described in the above-mentioned Letters Patent.

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

1. In a fastening inserting machine, a driver bar having a recess therein, a driver secured to said driver bar, means for reciprocating said driver bar and said driver to insert fastenings in a work piece, a bar fitting into the recess in said driver bar, and teeth on said bar engaging said reciprocating means, said bar being arranged to fit loosely in the recess in the driver bar to permit the driver bar to move relatively to said reciprocating means as the reciprocating means comes to rest.

2. In a fastening inserting machine, a driver bar having a recess therein, a driver secured to said driver bar, cam operated means for recipro- 5 eating said driver bar to insert fastenings in a work piece, a bar arranged to fit into the recess in said driver bar, and teeth on said bar arranged to engage said reciprocating means, said toothed bar being shorter than the recess in the 10 driver bar to permit the driver bar, because of its momentum, to continue its movement to drive the fastening into the work after the reciprocating means has completed its movement.

3. In a fastening inserting machine, a driver 15 bar having a recess therein, cam operated means for reciprocating said driver bar to insert fastenings in a work piece, a bar fitting into the recess in said driver bar, and teeth on said bar positively connecting said bar to said recipro- 20 cating means, said bar being shorter than the length of the recess to permit the driver bar to move relatively to the reciprocating means to impart a hammer blow to the fastening to drive the fastening entirely through the work and to 25 head the fastening.

4, In a fastening inserting machine, a driver bar having a recess therein, a driver secured to said driver bar, a cam operated bell crank lever for reciprocating said driver bar to insert fastenings in a work piece, a member fitting into said recess in said driver bar, and teeth on said member positively connecting said member to said bell crank lever, said member being shorter than said recess and arranged, when the bell crank lever nears the end of its movement toward the work, to permit the driver bar to move relatively to said bell crank lever to impart a hammer blow to the fastening to drive the fastening through the work and to head the 40 fastening at the surface of the work.

FRED N. LACHAPELLE.

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