US2456123A - Edge finishing machine - Google Patents

Description

Dec. 14, 1948. T, w, HA T 2,456,123

EDGE FINISHING MACHINE 2 Sheets-Sheet 1 Filed Jan. 22, 1947 Dec. 14, 1948. T. w. HART EDGE FINISHING MACHINE 2 Sheets-Sheet 2 Filed Jan. 22., 1947 Thomas William Ham Patented Dec. 14, 1948 signor to United Shoe Machinery Corporation,

Flemington, N.-J., a corporation of New Jersey Application January 22, 1947, Serial No. 723,588 In Great Britain February 25, 1946 I 3 Claims.

This invention relates to shoe finishing ma,-

chines, and is herein disclosed as embodied in an edge setting machine of the type illustrated and described in United States Letters Patent N0. 1,078,684, granted November 18,1913,'upon the application of Frank B. Keall et al. Insuch machines, the shoe is secured in a jack which is oscillated to cause each point upon that portion of the sole edge which is to be treated to perform a plurality of traverses relative to a rapidly'vibr'ating edge setting tool. Machines of this type may, if desired, be provided with devices for applying a finishing medium, such as wax or ink. For an example of such an applying device, reference may be had to United States Letters Patent No. 2,115,838, granted May 3, 1938, upon the application of Charles Martin Bagshaw et al. A modification of the above-mentioned machine of Keall et al., as disclosed in United States Letters Patent No. 1,693,634, granted December 4, 1928, upon the application of William Roderick Barclay et al., provides a mechanism for stopping thevibration of the edge setting tool at a predetermined stage of the operation; such mechanism, however, requires a manualeffort on the part of the operator in tightening a belt which causes the tool to be vibrated. Another improvement upon the machine of Keall et al. is disclosed in United States Letters Patent No. 2,133,370, granted October 18, 1938, upon the application of Charles Martin B'agshaw et al., which improve ment consists in the provision of a fluid pressure mechanism for controlling the pressure exerted by the edge setting tool against the edge of the sole. Even with this improvement, however, manual effort is required of the operator tobrin'g the tool into engagement with the sole edge.

It is an object of theprese'nt invention topro' vide a machine of the-character above described wherein the various instrumentalities' may be brought into operation with a minimum of effort on the part of the operator. In accordance with a feature of the invention, the illustrated edge setting machine is provided with a driving connection between a fluid pressure-driven piston and a member which is movable to cause the belt for vibrating the tool to be tightened. As shown herein, this driving connection includes'a cam mechanism so; arranged as to retain the vibrating device in operation during movements of the piston which take place in the automatic regulation of the pressure of the tool against the work;

These and other novel features of the invention will appear more fully'fromthe following detailed description when read in connection with 2 I the accompanying drawings and will be pointed out in the appended claims.

In the drawings,

Fig. 1 is a front elevation of an illustrative edge setting machine embodying the present invention;

Fig. 2 is a detail plan View of a portion ofthe mechanism shown in Fig. 1; and

Fig. 3 is a view, in elevation, of a cam shown in the preceding figures. i

The illustrated machine, except as otherwise noted, is similar to the machine disclosed in Let-. ters PatentNo. 2,133,370, above mentioned, to which reference may be had for a complete understanding of parts not shown and described herein. Both it and the patented machine just referred to are provided with a jack J in which is clamped a shoe S and also with an edge-setting tool T (referred to as 1 in the patent) which is mounted on a head H (11 in the patent) mov-' able toward and from the sole edge. These machines are provided also with a mechanism for oscillating the jack to transfer the locality of operation upon the sole edge with respect to the tool T, with mechanism for vibrating the tool T during its operation, and with means for automatically maintaining the tool T in correct relation to the sole edge, all of which are disclosed in United States Letters Patent No. 1,078,684,

above mentioned; The illustrated machine may be'provided also with an automatic device of the type disclosed in Letters Patent No. 2,115,838,

above mentioned, for applying wax to the sole edge to assist the setting operation. It may be further provided with, means disclosed in Letters Patent No. 1,693,634 for stopping the normal vibratory movement of the tool during the last portion of the operation of the tool upon the sole edge-to enable the tool to operate thereafter upon the work with a simple wiping or sleeking action.-

The illustrated machine, furthermore, is provided with a control mechanism not disclosed in the patents, above mentioned. This control mechanism is associated with a piston rod l0 pivotally connected at its lower end to a hydraulic piston M. The rod l0 corresponds to the rod referred to in Letters Patent No. 2,133,370 as the rod 45 and th piston l 4 corresponds to the piston 41 referred to-in said Letters Patent. Pivotally connected to the rod IU (of the illustrated machine) by a pin I6 are the lower end portions of a pair of upwardly extending links l8 positioned upon opposite sides of the rod. The upper end portions of the links 18 are adiustably secured to the lower end portion of a bar 20 lying between the links and parallel thereto.

Extending through the bar 20 are longitudinal slots 22 through each of which extends a screw 24 for clamping the, links to the bar. Upon loosening the screws 24T'the bar 20 may be adjusted longitudinally with respect to the links. Pivotally connected to the upper end portion of'the'bar -2 ll;-,by a pin 26 is a cam 28 which is guided for sliding movement in a guideway 30 mounted upon abracket 32 secured to the frame of the machine. The cam 28 is retained in its guideway by a cover plate 34 and it is slidable up and down in itsgguideway in an inclined path which is substantially parallel to the rod 10. The upper end face of the cam 28 has itsedges rounded off to provide a convex cam surface 36 (Fig.3) arranged to engage a cam roll 38 mounted for idle rotation upon a horizontal stud 40 securediin the rear portion of a horizontal forwardly extending cam lever 42. The bottom face of the cam 28, at a locality adjacent to the upper end face, also has its edges rounded off to provide a convex cam surface 81. The corner of the cam 28'at the junction of the cam surfaces 36 and 31 is rounded off to render these camv surfaces continuous. The

cam surface 31 extends in the direction of move tion after the cam roll has been moved to the right (Fig. 2) by the cam surface 36. The. cam lever 42 is pivoted about mid-way of its length on a vertical stud 44 secured in the bracket '32. The forward end portion of the cam lever 42 is connected by a. vertical pivot pin 48 to the left-hand portion of a bar 48 corresponding tothe bar referred was the bar 305 in the modification of the machine which is disclosed in United States Letters Patent No. 1,693,634 through which a belt controlling mechanism, similar to that disclosed in the last mentioned'patent, is operated. Referring now to Letters Patent No; 2,133,370 it will be observed that a similar bar not identified by number in said Letters Patent is pivotally connected to a lever numbered 21 in said patent.

The illustrated-machine is further provided with a starting handle 50 (Fig. 1) which corresponds to the starting handle 17 of the machine disclosed in United States Letters Patent No. 2,133,370. This starting handle is pivotally connectedby a pin 52 to a control lever 54 corresponding to the control lever 2l of the machine disclosed in the patent just mentioned. A stud 56 having its. shank secured in the lever 54 passes into an arcuate. slot 58 formed in the starting handle'50, while a headed pin fifl'fixedin the stud 56 and extending radially therefrom passes laterally through an aperture in the starting handle 58'. The pin 68 has surrounding it a compression spring 62 confined between the head of the pin and the edge of the handle 50. The control lever 54 is securely fixed upon a shaft 64, corresponding to the shaft referred to as 23 in Letters Patent No. 2,133,370, and this shaft is journaled in bearings mounted in the frame of the machine. The shaft6;4'controls a valve. (not shown herein) corresponding to the Valve 170 of the machine disclosedin Letters Patent No. 1,078,684 for controlling the mechanism for oscillating the jack J. Extending, from the lower portion of the controllever 54 are a pair of arms 66 through which drl ifis engageable with slots-Ill. The slotsflllar'e formed in a pair of links '12 pivotally connected by pins 13 to the piston [4 which operates the rod 10. The upper end portion .of. the.

rod l0 yieldingly engages. through a strong com pression spring 15, a lever 74 corresponding to the lever referred to as 13 in Letters Patent No. 2,133,370. The lever 14 moves the head H and thereby the edge setting tool T toward and from the work. Mechanism similar to that disclosed in the patent just mentioned operates through a rod 16 for. automatically controlling a valve 78 which in turn controls the pressure exerted through the piston I4 and the spring 15. The head H is normally held in an out-of-the-way position wherein the tool T is away from the sole edge by means of a tension Spring 80. All the parts just mentioned beginning with the arms 66 are similar to corresponding parts disclosed in Letters Patent No. 2,133,370.

In the machine disclosed in Letters Patent No.

2,l33,370, the springs corresponding to the springs yield until the edge setting tool engages the edge of the sole. In the machine illustrated herein, however, the compression spring 62 is weak enough, with respect to the tension spring 80, to enable it to yield at once when the operator moves the starting handle 50 in a counterclockwise direction to start the operation of the machine. As soon as the spring 62 yields, and before movement of the lever 54 begins, the movement of the handle 50 operates through a rod 82 to open the valve 18. Initial movement of the starting handle in the illustrated machine, therefore, serves at once to admit fluid pressure to the cylinder of the piston l4 and starts the plunger on its upward movement without further effort bein required of the operator.

The control lever 54 of the illustrated machine is urged in a counterclockwise direction by a spring 84 which, while not strong enough to overcome the spring 80, serves (as does a corresponding spring 44 of the machine disclosed in Letters Patent No. 2,133,370) to hold the control lever in an initial position wherein the pins 38- engage the tops of the slots 10. v

The operation of the machine will now be explained. After the shoe S has been clamped in the jack J, and while all the parts of the machine are in their normal or initial positions as shown in Fig. 1, the operator grasps the handle 50- and moves it in a counterclockwise direction to the left. The spring 62 thereupon yields while control lever 541s momentarily held stationary by the spring 80, and the movement of the han dle 50- relative to the lever 54 will operate through the. rod 82 to open the valve 18 and admit fluid pressure to the cylinder containing the piston l4. The rod i0 is thereupon moved upwardly by fluid pressure to overcome the tension of the spring 80 and to move the head H toward the left until the tool T engages the edge of the sole of the shoe. The pressure of the tool against the sole edge is thereafter controlled by mechanism similar to that disclosed in Letters Patent No. 2,133,370. If the rod HI, under the influence of fluid pressure, should be moved upwardly with undue speed, the tool T might come into too forceful contact with the work and thereby damage the edge of the sole. However, whenever-the rod 18 moves upwardly fast enough for the tops of the slots 10 to rise above the pins 68, the spring 84 Will immediately swing the lever 54 in a counterclockwise direction and'. thereby cause it to move the pin 52 to the left which will result in movingthe rod 82 tov the left and closing or partially clos-' ing the valve [8. It is evident, therefore, that the rod ID will rise at a speed depending upon the speed with which the operator swings the handle 50 to the left. He should therefore guard against moving the handle too fast and, if necessary, he should stop or even reverse the movement of the handle if he observes that the tool is moving too rapidly toward the work. Preferably the operator moves the hand lever relatively slowly in a constant direction to cause the valve 18 to be opened just enough to allow the fluid pressure to move the piston slowly and without permitting the pins 68 to leave the tops of the slots 10. The starting handle 50 and the control lever 54 will thus be maintained in their relatively displaced positions. If, however, the speed of the starting handle should be unduly increased and the valve l8 opened unduly wide, the speed of the piston will immediately be increased and the tops of the slots will move away from the pins; relative movement between the control lever and the starting handle will then take place in a direction to close or partly close the valve and the rapid movement of the piston will be stopped or diminished and any possible damage to the work will be avoided.

As the control handle 50 approaches the end of its movement in a counterclockwise direction, the control lever 54 comes into engagement with a stop on the machine frame and the starting handle is locked by mechanism disclosed in Letters Patent No. 1,078,684. However, before the control lever has engaged the stop it will have turned the shaft 64 far enough to open a valve controlling the oscillatory movement of the jack J, this jack being thereupon operated to cause the work to traverse the tool T a predetermined number of times.

As the rod l rises it operates through the links I8 and the mechanism associated with the cam 28 to move the rod 48 toward the left, thereby operating a belt tightening mechanism, for vibrating the tool T, such as that disclosed in Letters Patent No. 1,693,634. The bottom cam face 31 maintains the vibrating mechanism in operation during the to-and-fro movements of the piston l4 which take place in the automatic regulation of the pressure of the tool against the work, and which are permitted by the lost-motion slots 10.

It will be observed that the only effort required of the operator in initiating the various movements of the several parts of the machine is the compression of the relatively light spring 62. The upward movement of the rod [0 to bring tool T into engagement with the edge of the sole of the shoe and the movement of the belt tightening mechanism operated by the rod 48 are both effected by fluid pressure in the illustrated machine and do not require any effort on the part of the operator.

After the predetermined number of traverses 6 of the work relative to the tool have been completed, the lever 54 is automatically released and all parts of the machine are returned to their initial positions.

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

1. An edge setting machine comprising an edge setting tool, a spring for pressing said tool against the work, a member bearing against said spring and movable to and fro during the operation of the tool upon the work to control the pressure developed by the spring and exerted through the tool upon the work, means for vibrating the tool, and a connection between said control member and said vibrating means constructed and arranged automatically to initiate the operation of said vibrating means upon the initial movement of the control member which causes the tool to press against the work and to enable the control member to make subsequent to-and-fro movements without interrupting the vibration of the tool.

2. An edge setting machine comprising an edge setting tool, a shoe support, power-driven means for effecting relative movement between said support and said tool to effect relative traverse between said tool and the edge of the sole of a shoe on the support, an operator-controlled device for starting the operation of the power-driven means, means actuated by said starting device for moving the tool into engagement with the sole, means for vibrating the tool, means operated by the starting device for initiating the operation of t e vibrating means, a lost-motion connection between the starting device and the means for moving the tool into engagement with the sole, and cam mechanism included in said vibration-initiating means constructed and arranged to retain the vibrating means in operation during the movement of parts permitted by said lost-motion connection.

3. An edge setting machine comprising an edge setting tool, a shoe support, power-driven means for eifecting relative traverse between said tool and the edge of the sole of a shoe on the support, a starting handle for initiating the operation of the power-driven means, means actuated by the starting handle and including a fluid pressure operated piston for moving the tool into engagement with the shoe, a lost-motion connection between the starting handle and said piston, means for vibrating the tool, and a cam mechanism operated by said piston for initiating the operation of said vibrating means, said cam mechanism being constructed and arranged to retain the vibrating means in operation during the movement of parts permitted by the lost-motion connection.

THOMAS WILLIAM HART.

N 0 references cited.

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