US2181238A - Trimming and roughing machine - Google Patents

Description

TRIMMING AND ROUGHING MACHINE 1 Filed Feb. 24-, 1938 Patented Nov. 28, 1939 UNITED STATES- TRIMMING AND ROUGHING' MACHINE Jacob S. Kamborian, Newton, Mass, assignor to United Shoe Machinery Corporation, Borough of Flemington, N. 3., a corporation of New Jersey I Application February24, 1938, Serial No. 192,380

14 Claims.

This invention relates to machines for operating on the bottoms of cement-lasted shoes and is,

herein illustrated as embodiedin an improved .organization comprising two power-operated mechanisms arranged to perform two different operations simultaneously with provision for interrupting or suspending one of the operations without affecting the other. I r In the manufacture of cement-lasted shoes the 19 lasting margin comprising the upper and the lining usually includes a small amount of surplus material to be gripped by the jaws of a lasting apparatus, and it is necessary to sever this surplus material after the adhesive bond of the lasting cement has become firmly established. Moreover, if the outsole of such a shoe is to be attached with cement, with or without supplemental stitching, the remaining lasting margin of the upper should be abraded before the sole-attaching cement is applied thereto, to insure a strong bond of adhesion. It has been the practice heretofore to sever the aforesaid surplus material with one handling of the shoe and to abrade the remaining lasting margin of the upper subsequently with another handling, two separate machines being required for such procedure.

To save time and apparatus an object of the present invention is to provide for performing both of the aforesaid operations simultaneously with one machine and with one handling of the work. Accordingly, hereinillustrated, the present invention provides a combined machine comprising power-operated trimming means and poweroperated abrading means so related that both may perform their respective operations simultaneously at points so closely adjacent to each other that the operation of one will not interfere with the operation of the other. To insure maintenance of the lasted margin in the desired relation'to both the cutting means and the abrading means, the illustrated machine is provided with a work-guiding member formed and arranged to project between the insole and the strip of surplus material to be severed. In addition to its guiding function this member supports and braces the strip at the cutting locality to insure clean cutting thereof. I

. Preferably, and as herein shown, the abrading member is so mounted as to be capable of yielding to the demands of the Work as the latter is manipulated for the trimming operation. Moreover, the abrading member, though arranged to remain normally in contact with the work, may

be retracted from the work as by atreadle to avoid excessive abrasion at any point of the work in the event that the feeding movement of the Work is interrupted, as it may be by some localized con dition affecting the trimming operation. The

on feeding of the shoe, which is entirely manual,

may therefore be governed with regard only to the progress of the trimming operation, and.

the effect of the abrading means may be governed with individual manual control.

As herein. shown the movable cutter and the stationary work-guiding member are so related as to sever the strip of surplus material progressively with successive shearing cuts, the workguiding member having a shearing edge that runs under the strip and extends parallel with the path of feeding movement. This shearing edge normally engages the insole which is held against it by the strip to be severed, but the insol'eis di placed from it slightly byevery cutting stroke of the movable cutter which has a beveled face.-

- accordance'with the'present invention, the treadle for controlling the abrading member being represented in close relation to the upper portion of the machine merely to save space in the drawing; and

Fig. 2 is a top-plan view on a larger scale including the'forepart of a cement-lasted shoe in process of being trimmed and abraded by the instrumentalities likewise represented in the figure.

The machine represented in Fig. l is provided,

with a fixed blade Ill and a movable blade 5 I oooperatively arranged to sever a strip of surplus material progressively with successive shearing cuts. The movable blade I l operates in the manner of a chisel andisafiixed to the forward end of a reciprocatory carrier 12 arranged to slide in a bearing !3 in a frame M. ,This frame may be mounted on and secured to the upper surface of a bench or a pedestal represented by the line 15. The carrier I2 is reciprocated 'endwise at high speed byan eccentric IE to which it is connected by a strap H, the connection between the strap and the carrier being formed by a pivot member IS. The eccentric is affixed toa shaft 20 which is also provided with a pulley 2! on which n a driving belt 22 runs. The shaft 253 is journaled in bearings in the rear part of the frame Hi.

As shown in Fig. 2 the forward end of the blade II is provided with an oblique cutting edge 23 some portion of which always remains under and in contact with the lower end of the fixed blade lower face 9 thereof. The face 9 moves to and fro across the lasted margin of the upper, and since it is inclined with respect to its path of travel, it operates with a camming effect, during each cutting stroke, to depress the shoe and thereby separate the insole slightly from the fixed" blade. The two blades thus cooperate to pry apart, step by step, the insole and the surplus material to be severed.

The fixed blade 10 is secured byclampingscrews 24 to an overhanging bracket 25 afiixed to the frame l4 and forming an extension thereof. The shank of the blade I!) is provided with a slot 26 extending lengthwise thereof to receive the screws 24 and to provide for lengthwise adjustment of this blade whereby its lower end may be located in contact with the upper face of the blade II. The lower end of the blade 19 is beveled to provide a surface for guiding the insole, and has a sharp straight edge 21 that crosses and touches the cutting edge 23. The edge 2'. extends virtually parallel to the path of feeding movement of the work, the direction of feed, considering Fig. 2, being from right to left. To facilitate using the fixed blade to pry the surplus material of the lining and upper away from the insole of a shoe, a notch is ground in the righthand margin of this blade to form a toe 28 the upper surface 29 of which is beveled and slightly inclined. This toe is arranged to be inserted between the insole and the surplus material and to bend the latter to a semi-erect position in front of the movable blade I I.

The shoe represented in Fig. 2 comprises the usual upper and lining, the lasting margins 30 of which are secured with cement to each other and to an insole 3| on a last (not shown) according to any well-known or preferred cementlasting procedure. After the upper and the lining have become firmly bonded to the insole by 'the lasting cement, it is desirable and usually necessary to sever a strip of surplus material from them as represented in Fig. 2 in which the strip in process of being severed is indicated at 32. For this operation the operator holds the shoe bottom up and feeds it manually from right to left, starting the operation at the heel-seat and at the rear side of the shoe. As the toe of the shoe approaches the trimming blades, the operator swings the heel end of the shoe toward him and to the right and finally to the rear to feed the toe past the blades. Thereafter, the operator again moves the shoe from right to left to continue the trimming operation from the toe end to the heel-seat. In starting the trimming operation the operator first inserts the toe 28 of the fixed blade under the lining at the inner edge of the lasted margin and this toe thereafter pries the surplus material away from the insole and bends it upwardly to a semi-erect position, to the end that the moving blade I I may sever it cleanly at its line of bending. Since the surplus material runs up and over the inclined surface 29 of the fixed blade it draws the margin 3|] upwardly against the beveled face 9 of the movable blade which, on every cutting stroke, drives the shoe down and thereby separates the insole step by step from the strip about to be severed. The blades thus operate in opposition to each other to rupture the bond of cement wherever it extends into the area to be trimmed.

The lower portion of the fixed blade (Fig. 1) is inclined at a moderately steep angle to the shearing plane to enable the insole to extend across that plane close to the line of trimming. When the shoe is held to maintain the insole in that relation the blades sever the surplus material with beveling cuts so close to the face of the insole that no objectionable quantity of surplus material will be left after the trimming.

While the trimming operation is in progress, the portion of the overlasted margin of upper that remains attached to the insole may be abraded to prepare it for the reception of soleattaching cement. For this purpose the present invention provides power-operated abrading means, the abrading member of which is located adjacent to the trimming blades and preferably at the leaving side thereof. As herein shown, the abrading member is a wheel 33 arranged to overlie and bear on the surface to be abraded (see the area 8 shaded to represent abrasion) and is so mounted as to be capable of moving bodily up and down in accordance with corresponding movements and the surface contour of the work.

The abrading wheel 33 is affixed to a shaft 34 to which a pulley 35 is also afiixed. A belt 36 runs on the pulley 35 and also on a pulley 31 freely rotatable on a stationary pin 38. The pulley 31 has one groove for the belt 36 and another groove for a belt 39 driven by a pulley 40 secured to the shaft 26. The pin 38 is afiixed to the bracket 25 and provides a fulcrum for a lever 4| in the forward end of which the shaft 34 is journaled.

The abrading wheel barely clears the blades Ii] and l l and its lower segment normally lies slightly below the level of the work leaving the blades, but when a shoe is brought up to the operating level from a point below the blades, it will raise the abrading wheel slightly and support it with out requiring any appreciable effort on the part of the operator. The abrading wheel is driven preferably in the direction of the lasting tension to avoid a delasting tendency.

The lever 4! is so loaded that the force of gravity is suflicient to maintain the abrading wheel in contact with the work to be abraded, but that force may be supplemented by the force of a compression spring 42 arranged to exert upward thrust against a member 43 carried by the rear end of the lever. This spring surrounds a screw 44 that extends loosely through a hole in the member 43 and is provided with a nut 45 that serves as a stop to prevent the abrading wheel from descending to too low a level when the work is removed. The lower end of the screw 44 is connected to the bearing [3 by an anchoring pin 46. A nut 4! adjustable up and down on the screw provides a seat for the spring 42 and also provides for regulating the applied force of the spring and for letting it off entirely.

To provide for raising the abrading wheel out of contact with the work when occasion requires, the arm 4! is connected with a treadle 48 by a train of connections including a lifting rod 49, a lever 50, and a rod 5!. The lever 50 is mounted on a fulcrum stud 52 secured to the frame M. A block 53 carried by the lever 59 has swiveled connection therewith and is provided with a bore through which the lifting rod 49 extends loosely. A collar 54 adjustably secured to the rod 49 by a set-screw is initially seated on the block 53 but may be lifted therefrom when the work raises the abrading wheel. The fulcrum pin 55 for the treadle 48 is mounted in a floor bracket 56. The tread-plate of the treadle is initially supported at its upper level by a leaf-spring 5! anchored to the floor by the bracket 55. Consequently, the

freedom of the abrading wheel to move up and down as required by the Work is not affected by the treadle except when the latter is de-- pressed, as it maybe, to interrupt the abrading operation in the event that the feeding of the work is interrupted.

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

1. A trimming machine comprising power-operated cutting means arranged to sever progressively a strip of surplus material from the lasting margin of the upper of a lasted shoe, a workguiding member arranged to support said strip in position to be severed, an abrading member arranged to operate on said margin adjacent to the severing locality while said cutting means is severing the strip, and power-driven means arranged tooperate said abrading member.

2. A trimming machine. as set forth in claim 1 in which said abrading member is arranged to operate at the leaving side of the severing locality.

3. A trimming machine as set forth in claim 1 in which said cutting means and said abrading member are both arranged to operate on an upturned shoe bottom and in which the abrading memberis freely movable up and down according to the demands of the work.

4. A trimming machine as set forth in claim 1 in which the work-guiding member is formed and arranged to project between the insole and the strip to be severed and thereby maintain the shoe in the desired relation to said cutting means and said abrading member.

5. A trimmingmachine as set forth in claim 1 in which the abrading member is a rotary wheel the axis of which is freely movable according to demands of the work and the periphery of which is normally maintained in contact with the. work by a moderate force capable of yielding to such demands.

6. A machine for operating on lasted shoes comprising cutting means and abrading means arranged adjacent to each other to operate simultaneously on the lasting margin of the upper, one to sever progressively a strip ofsaid margin and the other to abrade the margin, and powerdriven means by which said cutting means and said abrading means are operated, said abrading means being movable with respect to said cutting means as required by unevenness and movements of the work.

7. A machine for operating on lasted shoes comprising cutting means and abrading means ar ranged adjacent to each other to operate simultaneously on the lasting margin of the upper, one to sever progressively a strip of said margin and the other to abrade the margin, power-driven means by which said cutting means and said abrading means are operated, treadle-operated means by which said abrading means maybe retracted from the work, and a stop arranged to locate said abrading means in an initial operative position from which it may be retracted by the work or by said treadle-operated means, as the case may be.

8. In a trimming machine of the type in which a stationary shearing member and a power-operated cutting blade are arranged to operate on the bottom of a lasted shoe with successive shearadjacently, one ahead of the other, on the lasted margin of the upper, one to sever a strip of surplus material from the inner edge of said margin and the other to abrade the surface of said margin, one of said means being movable by the Work as required for feeding and maintaining the work in the desired relation to the other, and power-driven means for operating both of said means at once.

10. A machine for operating on the bottom of a lasted shoe, comprising an abrading member work.

12. A machine as defined in claim 10 comprising also adjustable means by which to regulate the pressure exerted by said abrading member against said margin. I i

13. A machine for operating on the bottom of a lasted shoe, comprising an abrading member arranged to bear against the lasted margin of the upper, means by which said member is mounted and constrained to exert moderate and continuous pressure against said margin with provision for yielding to demands of the work, a fixed workguiding member arranged to bear on the insole under the inner portion of said margin at a point adjacent to said abrading member, power-driven means for operating said abrading member, and

power-driven means having a cutting edge arranged to out against said work-guiding member to sever a strip from the inner edge of said mar- 14. A machine for operating'on the bottom of a lasted shoe, comprising a stationary work-guiding member an extremity of which is arranged to be engaged by the insole and the lasting margin of the upper, an abrading member arranged to operate on the outer surfaceof said margin adjacent to said guiding member, yieldable means by which said abrading member is constrained to exert moderate and continuous pressure against said margin, power-driven means for operating said abrading member, and treadle-mechanism

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