US2064027A - Fastening inserting machine - Google Patents

Description

Dc.'l5, 1936. M, MOODY 2,064,027

FASTENING INSERTING MACHINE Filed Feb. 15, 1936 BSA Eli-a" 3266 44 112 o 110 108 AWE/V757,?

Patented Dec. 15, 1936 UNITED STATES PATENT OFFICE FASTENING INSERTING MACHINE Application February 15, 1936, Serial No. 64,075

6 Claims.

This invention relates to fastening-inserting machines and is illustrated herein as embodied in a machine for inserting fiber pegs in the manufacture of boots and shoes.

In inserting fastenings, for example pegs, to secure together shoe parts, it is sometimes desired that the lengths of the pegs inserted be varied in accordance with the thickness of the different portions of the material through which they are driven. This gives the pegs the maximum holding power and insures that they will not pull out even from parts which are comparatively thin. For example, when pegging the heel seats of Goodyear welt shoes it is impracticable to gage the thickness of a shoe bottom when the operation is performed with the shoe upon a last. However, it is usual as illustrated in United States Letters Patent No. 1,849,253, granted March 15, 1932, upon an application filed in the name of F. N. La Chapelle, to utilize the awl of a peg inserting machine to measure the thickness of a shoe bottom, the mechanism which gives the awl its penetrating movement being arranged to permit the awl to come to rest when it meets excessive resistance as when it strikes the metal heel plate of a last, and thereby controlling the feeding mechanism for the peg material so as to cut a peg of appropriate length.

It is an object of the present invention to provide improved mechanism applicable, for example, to fastening-inserting machines for use in heel seat nailing or pegging by which the awl will come to rest when it has passed through the shoe bottom and meets an excessiv resistance.

To this end and as illustrated, the invention provides a fastening-inserting machine in which the awl operating mechanism comprises a toggle, normally in nearly straightened condition, which is movable bodily to transmit Work penetrating movement to the awl and which is arranged to yield by moving into broken condition when the awl meets an excessive resistance.

These and other features of the invention are shown in the accompanying drawing, will be described in the following detailed specification, and will be pointed out in the claims.

In the drawing,

Fig. 1 is a side elevation of the head of a fastening-inserting machine embodying my invention;

Fig. 2 is a side elevation of a portion of the head of the machine with the parts in the position which they occupy when the awl has penetrated the work; and

Fig. 3 is a perspective view showing details of the toggle mechanism.

The illustrated machine is of the general type disclosed in United States Letters Patent No. 1,030,775, granted June 25, 1912, upon an application filed in the name of George Goddu, although the present machine is organized to insert fiber pegs severed from a strip of fastening material such as paper twine in accordance with the disclosure of Letters Patent of the United States No. 1,729,169, granted September 24, 1929, on an application filed in the name of Fred N. La Chapelle. For a full disclosure of such parts of the machine as it is not necessary to illustrate herein reference may be had to the La Chapelle Patent No. 1,849,253 and the Goddu patent.

As illustrated in Fig. 1, the machine comprises a column Ml carrying a head l2 upon which are mounted the fastening-inserting instrumentalities of the machine, the column IE3 also carrying a work support terminating in a last pin 14. Mounted in hearings in the head I2 is a cam shaft .lfi carrying a cam member 58 provided with a series of cam grooves and surfaces arranged to operate the moving parts of the machine. At the forward part of the head is mounted an awl bar carrier in which is positioned an awl bar 22 carrying an awl 24, the awl bar carrier being arranged for reciprocation vertically by means of a rack 26 which is engaged by a gear segment 28 on the forward end of a lever 39 pivoted at 32. The lever 30 has a rearwardly extending arm 39 having teeth 36 meshing with teeth 38 of a lever 40 which operates mechanism (not shown) for controlling the length of pegs to be driven in accordance with the length of the awl stroke.

The awl bar lever 36 is rocked about its fulcrum by a bell-crank lever 22, fulcrumed at M at the upper portion of the head 12, there being releasable connections between the bell-crank lever and the lever 39. The bell-crank lever 42 is oscillated by means of the cam is, which engages a roll 46 on one arm 43 of the bell crank, positioned in a cam track 59. The other arm 52 of the bell crank is provided with a slideway 54 T- shaped in cross section in which is positioned one end 55 of a stud 56 (Fig. 3) which carries a depending link 58, the link having a bearing upon a sleeve 69 and being secured in fixed position along the arm 52 by a nut 62. At the lower end of the link 58 there is a slot 64 through which passes a stud 66 on the end of which is pivotally mounted an end of a lever 68 which is keyed to the lever 30. The stud 66 isarranged to slide in the slot 64 relatively to the link 58 but is held against endwise movement by a shoulder 70 and a collar 12 located on the stud on opposite sides of the link.

Pivotally mounted upon the stud 66 is an arm 14 having a lateral extension 16 which is pinned at 11 to a link 18 mounted upon a stud carried nearer the central portion of the link 58. The arm 14 and the link 18 form a toggle normally operative to connect the stud 66 and the stud 56, as shown in Fig. l, for transmitting movement to the awl bar lever 30. This toggle is normally held in an almost straightened condition by means of a spring 82 surrounding a rod 84 pivotally mounted in ears 86 at the upper end of the arm (4, the spring extending between a washer 88 on the rod and a shoulder 90 formed on a sleeve 92 surrounding the lower end of the rod. The under side of the shoulder 90 has a beveled portion 94 positioned in a conical seat formed in a lug 96 on the lower end of the link 58. The tension of the spring is regulated by a screw threaded nut 98 near the upper end of the rod. The spring normally operates to force the arm 14 about the stud 66 in a counterclockwise direction, this movement of the arm being limited by a stop I00 carried by a boss I02 on the link 58 and arranged to engage a yieldable button I04 at the upper end of the arm 14. It is to be noted that when the spring 82 has forced the arm 14 into its normal position the toggle is nearly straightened but not exactly so, otherwise the toggle could not be broken. To this end, the pivot 17, when the arm 14 is in its farthest position to the left lies to the right of a line drawn between the stud 66 and the stud 80, the amount of the deviation being adjustable by means of screw threads I06 on the stop I00. When the toggle members are in nearly straightened position, as shown in Figs. 1 and 3, under pressure of the spring 82, the bell crank 42 is operatively connected through the connections 58, 18, l6, l4, and 68 to the awl bar lever 30 with the result that as the cam I 8 rotates to rock the bell crank in a clockwise direction the lever 30 will drive the awl 24 to penetrate the work. When, however, the awl meets with an excessive resistance the lever 30 will be held stationary and upon continued movement of the bell crank the arm 14 will rotate about the stud 66 and the toggle members 76 and 18 are moved into broken position. This is illustrated in Fig. 2 which shows the awl 24 as having passed through various thicknesses of a shoe I08 on a last H0 and in engagement with the upper surface of a metal heel plate H2 on the last. It is to be noted that the arm 14 has moved in a clockwise direction to break the toggle. Upon continued movement of the bell crank the link 58 will slide along the stud 66 without applying increased pressure to the awl bar lever. Upon return movement of the bell crank the spring 82 will force the arm 14 in a counterclockwise direction again straightening the toggle with the result that continued movement will result in rotating the awl bar lever in a direction to withdraw the awl from the work.

In the operation of the machine a shoe such as shoe N18 is presented to the machine with the heel end thereof in alinement with the awl. As the bell-crank lever 54 oscillates the awl is brought down upon the work to perforate it by means of the awl bar lever 30 which is driven through the toggle links 14 and 18 which are then in straightened condition and form a substantially rigid connection between the lever 30 and the bell crank 54. When the awl encounters excessive resistance, as by engaging the heel plate H2 of the last H0, the spring 82 will yield permitting the toggle links to rotate about their pivots in a direction away from the link 58 and the bell crank 54 will continue its upward movement. When the bell crank oscillates in the opposite direction the spring will eventually return the toggle links to their original position, thus causing the lever 30 to be rotated in a direction to remove the awl from the work.

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

1. A fastening-inserting machine having, in combination, an awl carrier, an awl carried thereby, and means for causing the awl to penetrate a work piece including toggle links normally in nearly straightened condition and movable bodily to transmit work penetrating movement to the awl carrier and arranged to move into broken condition when the awl meets an excessive resistance.

2. In a fastening-inserting machine, the combination of an awl and means for operating the awl to make fastening receiving holes in a work piece presented thereto including a toggle and a spring normally operative to maintain the toggle in nearly straightened condition thereby to transmit work penetrating movement to the awl.

3. In a fastening-inserting machine, a frame, an awl bar mounted for movement heightwise of the frame, an awl carried by the bar, an awl bar lever pivotally mounted upon the frame and having one end thereof operatively connected to the awl bar, a power-operated lever having a link pivotally mounted thereon, a pair of toggle links connecting the said link and the awl bar lever, and a spring normally operative to force the toggle links about their pivots with their axes nearly in alinement with that of the said link.

4. A fastening-inserting machine comprising a frame, an awl bar mounted for movementheightwise of the frame and carrying an awl, an awl bar operating lever pivotally mounted upon the frame and operatively connected to the awl bar, a pivot carried by the awl bar operating lever, a power-operated member for driving the lever, and a yieldable connection between the member and lever comprising a link carried by the member, a pair of links pivotally connected to the pivot and to the said link to form a toggle, and a spring engaging one of the links normally operative nearly to straighten the toggle but yieldable to permit breaking of the toggle when excessive resistance is encountered by the awl. 5. A fastening-inserting machine comprising a frame, an awl arranged for movement heightwise of the frame, means for driving the awl comprising a bell-crank lever, an awl operating lever, a member pivotally mounted upon the bell-crank lever and making slidable engagement with the awl operating lever, a pair of toggle links pivotally connecting the member and awl operating lever, a spring normally operative to rotate the toggle links toward a position in which their axes are nearly in alinement with the axis of the member, and a stop on the membar for limiting movement of the toggle links.

6. A fastening-inserting machine comprising a frame, an awl bar movable heightwise of the frame, an awl carried by the bar, an awl bar lever pivotally mounted upon the frame and operatively connected to the awl bar, a shaft carried by the awl bar lever, a power-operated oscillating member having a slot in which the shaft is slidably mounted, and a pair of toggle links pivotally connecting the power-operated member and a shaft, and means for rotating the toggle links toward the axis of the power-operated member arranged to yield when the awl encounters an excessive resistance.

FRED M. MOODY.

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