US2086352A - Randing machine - Google Patents

Description

July 6, 1937. w. c. CARD, JR 2,086,352

RANDING MACHINE Filed May 29, 1934 2 Sheets-Sheet l 4145 48 45 .i l 61 3 3.9 T

INVENTOR W July 6, 1937.

w. C. CARD, JR

RANDING MACHINE Filed May 29, 1934 2 Sheets-Sheet 2 QQQQQQQ INVENTOR "I/IIA BY ,4? I

M 6 ATTORNEYS Patented July 6, 1937 UNITED STATES PATENT OFFICE RANDING MACHINE Application May 29, 1934, Serial No. 728,085

8 Claims.

This invention relates to randing or cutting machines which are useful chiefly in shoe manufacturing operations.

An object of the present invention is to provide a machine for making one of the cuts for severing the complementary insoles and outsoles shown in U. S. Patents Nos. 1,838,708 and 1,902,725 issued to F. Sbicca. In accordance with the showingin those patents, insoles and outsoles are cut from a single piece of stock in such a manner as to form an insole having a perforate forepart and an outsole having its forepart landed to mate with or complement the insole. One method of forming these parts involves making a series of cuts in the stock, and the machine of the present invention is primarily adapted to make a randing cut around the forepart of this stock so as to separate the insole and outsole while making the described perforate and landed portions.

While the present invention accordingly is primarily useful in the above manner, certain benefits thereof may be obtained generally in other randing or channeling operations. It is therefore contemplated that it may be used in any such operation to which its nature adapts it.

Further objects of the invention are to provide a machine of this kind which is rugged and eflicient in its operation and with which the operator can readily perform the required operations.

Other objects of the invention will in part be obvious and will in part appear hereinafter.

The invention accordingly comprises the features of construction, combination of elements, and arrangement of parts, which will be exemplified in the construction hereinafter set forth and the scope of the application of which will be indicated in the claims.

For a fuller understanding of the nature and objects of the invention reference should be had to the following detailed description taken in connection with the accompanying drawings, in which:

Fig. 1 is a front elevation of the working head of a machine embodying features of the invention;

Fig. 2 is a top plan view of the machine shown in Fig. 1;

Fig. 3 is a horizontal sectional view substantially corresponding to line 3-3 of Fig. 1;

Fig. 4 is a side elevation of the machine of Fig. 1 when viewed from the left in that figure;

Fig. 5 is a vertical sectional view taken sub- 'stantially along line 5-5 of Fig. 1;

Fig. 6 is a side elevation of the machine shown in Fig. 1 as viewed from the right in that figure;

Fig. 7 is a fragmentary detailed perspective view showing the relationship of certain parts of the machine;

Fig. 8 is a fragmentary perspective view of a randing knife viewed from its under side;

Fig. 9 is a perspective view representing the operation of the cutting knife on a piece of work stock;

Fig. 10 is a fragmentary perspective view further illustrating the relationship of the cutting knife to the material on which it works; and

Fig. 11 is a fragmentary sectional View taken through the edge portion of a piece of stock and showing the cutting position of the knife therein.

In using the present machine a piece of rounded outsole stock is provided having a thickness equal to the combined thickness of an outsole and insole. This stock is first given a beveled slash along its ball line as shown at A in Figs. 9 and 10. This slash may be performed by suitable machinery such as that described in my copending application Serial No. 729,403. The stock is then split from the heel up to slash A. This split is indicated at B in Fig. 9, and may be performed by any suitable leather splitting device. The stock is then ready to be operated on by the present machine, which has a knife that is insertable in the split B and is formed so as to cut around the forepart of the sole stock along a horizontal plane C (Fig. 11) and an inclined plane D, these two outs serving to free the insole from the outsole and at the same time to leave perforate the central forepart portion of the insole and to leave a complementary raised or landed portion on the outsole.

Referring more particularly to the drawings, there is shown a cast head I0 which is mounted on a suitable pedestal l I so as to be brought to a convenient height for the operator, who stands directly facing the machine as it is illustrated in Fig. 1. Extending rearwardly from head I0 is an integral support for a knife holder bracket l2. Bracket I2 is fastened to such integral support by suitable screws 13 and has a split bushing l4 depending from its lower portion. A threaded bolt l5 serves to clamp this bushing about the cylindrical tail iii of a knife holder [1. Aknife I8 is mounted on this holder by means of a screw l9 (Fig. 3) which is threaded into the holder through an elongate knife slot 20. By means of this construction the knife can be adjusted in two directions by means of screws I5 and I9, which are adapted to hold it fixed with reference to the cast head l0.

This knife is so configured that it is adapted to effect the above described randing cuts. It has two cutting faces at an angle to each other, namely, the horizontal portion 21 which is adapted to cut inwardly from the edge of the stock, and the inclined portion 22 which cuts from this first named cut upwardly to the upper surface of the I 'work is applied to the knife in the manner shown in Figs. 9, 10 and 11 the required cuts are made by respective edges 2| and 22.

Means are provided for feeding and guiding the work to this knife. This means includes a constantly rotating pulley 24 which is freely rotatable on the hub 25 of a friction wheel 26, which in turn is keyed to a rotatable shaft 21. This shaft is rotatably journaled in the head In at 28 and 29. A spring 36 normally separates pulley 24 and friction wheel 26. The hub of the pulley has a freely slidable sleeve 3| abutting it. This sleeve is freely mounted on friction wheel hub 25 and has an outer beveled or wedge-shaped face 32. A crank arm 33 is affixed to the projecting outer end of shaft 21 and has a hand operated lever 34 pivoted thereto at 35. This lever is equipped at its outer end with a handle 36 and at its opposite end beyond pivot 35 hasa wedge-faced tail 31 which is adapted to slide against the wedge face 32 of sleeve 3|. By means of this construction movement of the handle 36 in a clockwise direction (Fig. 6) causes the wedge face at 31 to force sleeve 3| inwardly, and this in turn forces the constantly rotating pulley 24 into contact with the friction wheel 26, thus effecting rotation of the shaft 21. As shaft 21 thus is positively actuated by the driving pulley, crank 33 and its associated lever 34 and handle 36 are carried around with it. During operation of the machine, the operator may permit his hand to follow the movement of handle 36 and may disengage wedge 31 from pressing engagement against sleeve 3| at any time so that the power driving of shaft 21 may be discontinued and resumed at will.

Shaft 21 carries a driving gear 38 which meshes with a gear 39 on a shaft 40. This shaft is rotatably mounted on journals 4| and 42 forming part of a movable strap member 43. This strap member is pivotally mounted on head I0 at 44 and has its forward end adjacent journal 4| accommodated between two upstanding guideways 45 and 46 which are formed integrally with head In. Pivoted strap'43 is normally urged down toward head ID by means of a rod 41 which is pivotally attached thereto by means of a pin 48 passing through the body of the strap and through a loose-motion slot in the head of the rod 41. Near its lower end rod 41 has a spring seat or collar 49 attached thereto. Between collar 49 and a spring seat portion 50 of head I0 is extended a compression spring 5|. The downward limit of movement of strap 43 is controlled by a stop screw 52 which is adapted to abut a lug 53 carried by the strap. Rod 41 is adapted to be elevated so as to move strap member 43 and its appurtenant parts, hereinafter to be described, away from head H) by means of a bell-crank lever 54 which is pivotally mounted on head ID at 55. One arm of this lever underlies collar 49, and the other arm has a rod 56 depending therefrom which is adapted to be operated by a suitable treadle (not shown), depression of which is effective to cause the desired elevation of rod 41.

A work engaging feed wheel 51 is keyed to the left or outer end of shaft 40, and is adapted to be rotated by such shaft so as to force work toward the knife I8.

A presser foot 56 lies behind feed wheel 51 and is vertically adjustable on strap 43. The adjustable mounting for this presser involves a screw 59 passing through an elongate slot 60 and threaded into a portion of strap member 43, together with a vertical adjusting screw 6| which has a flange 62 slidable in a groove in the up- I per end of the presser foot. The foot 58 is vertically located so as to bear against work which is being fed under the wheel 51 so as to prevent pressure of such wheel from curling up the edge of the work. If desired, the foot 58 may be given a forked construction (not shown) so as to extend on both sides of the wheel 51.

A circular work support 63 is arranged to support work beneath the feed wheel and the cutting knife. This work support has a vertically extending spindle 64 (Fig. l) which is freely rotatable in a vertically adjustable bushing 65, the upper end of which is expanded to provide a socket 66 for a ball bearing race 61 on which the work support 63 rests. The expanded upper end of bushing 65 also includes a. projection 68 which provides a mounting for an edge gage 69. The vertically adjustable bushing 65 is slidably mounted in a socket 10 which is integral with head It], and rotation of the bushing with respect to such socket is prevented by means of a screw 1| the inner end of which projects within a vertical groove 12 in the side of the bushing. An adjusting screw 13 extends through the bottom of socket 10 and is freely rotatable therein at 14, while being restrained from vertical movement with respect thereto by means of a collar 15 and a hand wheel or knob 16 which is keyed to the lower end thereof. The upper face of this knob has a number of recesses, one of which is illustrated at 11, into which a spring pressed detent 18 may be selectively positioned for holding the knob in any adjusted position. The upper end of adjusting screw 13 is threaded into the lower end of bushing 65 so that rotation of the screw 3 effects vertical movement of the latter, and the extent of this vertical movement may be controlled at detent 18, the distance between adjacent recesses 11 preferably corresponding to some fractional value of an iron in the vertical displacement of work support 63. The vertical axis of work support 63 is offset with respect to the axis of feed wheel 51 as is shown at O in Fig. 2, the relationship being such that the feed wheel axis is located in advance of the support axis with reference to the direction of feeding movement. As a consequence, the feed wheel is adapted to contact work seated on the support at a point in advance of the support axis so that the feeding movement of the wheel and the rotational movement of the support give the work a complement of motion toward the edge gage 69 so that the edge of the work always has a tendency to contact this gage during the feeding and cutting operation. The work contacting portion of the gage is located almost opposite, but preferably a little in advance of the axis of the work support, while the knife edge at 2| is positioned just beyond this axis, as is shown in Figs. 3 and 4. This arrangement effects more or less automatic positioning and feeding of the work with reference to the fixed knife, and minimizes the amount of control required of the operator.

In the operation of the machine, the operator is provided with a rounded sole blank previously slashed and split at A and B. The operator depresses the foot treadle connected with rod 56 and thus elevates the feed wheel and presser foot with respect to the work support so as to permit insertion of the work between these parts. The knife I8 is inserted in the split B between the insole and outsole portions of the blank and the latter is placed in edge contact with edge gage 69. The foot treadle is then released allowing spring 5| to clamp the feed wheel thereagainst, the presser the friction wheel 26 as explained above.

foot acting to prevent upward curling of the work which might otherwise attend the considerable pressure exerted by the feed wheel. With the blank thus positioned, the operator pulls handle 36 in a clockwise direction, as viewed in Fig. 6, causing lever 34 to pivot at- 35 so that the wedge face at 31 forces constantly rotating pulley 24 against This imparts positive driving motion to the shaft 21 and consequently to the feed Wheel 51 which directs work toward the cutting knife, thus effecting the desired randing operation. During the feeding movement the handle 36 rotates with shaft 21 and the operator keepssuch handle within his grasp, following its movement as the feeding operation progresses. As long as he allows the handle and associated lever 34 to keep pace with the movement of shaft 21, the driving connection is maintained, but if he desires to discontinue the feeding operation he may move or retard the lever 34 so as to withdraw wedge face 31 from contact with wedge face 21, thus permitting spring 30 to become effective in separating the driving pulley and the friction wheel. It will be seen that by means of this construction the feeding movement may be kept under constant control and may be readily interrupted andresumed at will.

It will be seen that there has been provided a randing or cutting machine which is well suited to fulfill its intended functions. Since certain changes may be made in the above construction and different embodiments of the invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the following claims are intended to cover all of the generic and specific features of the invention herein described, and all statements of the scope of the invention which, as a matter of language, might be said to fall therebetween.

Having described my invention, what I claim as new and desire to'secure by Letters Patent, is:

1. A machine for operating on rounded sole blanks comprising a head, a circular work support freely rotatable thereon about a vertical axis, a device for operating on the marginal portion of a rounded blank mounted on said head above said support, an edge gage adjacent said support, and a driven feed wheel rotatably mounted on said head about a horizontal axis in position to contact work seated on said support, the axis of said feed wheel being located in advance of the work support axis.

2. A machine for operating on rounded sole blanks comprising a head, a circular work support freely rotatable thereon about a vertical axis, a device for operating on the marginal portion of a rounded blank mounted on said head above said support, an edge gage adjacent said support, a driven feed wheel pivotally mounted on said head, and means for clamping said feed wheel against work seated on said support at a contact point located in advance of the axis of the work support.

3. A machine for operating on rounded sole blanks comprising a head, a circular work support freely rotatable thereon about a vertical axis, a device for operating on the marginal portion of a rounded blank mounted on said head above said support, a member pivotally mounted on said head, a driven feed wheel mounted on said member, and spring means acting on said member normally to hold said wheel in contact with work seated on said support, said wheel being positioned to contact such work at a point in advance of the axis of the work support.

4. A machine of the class described comprising a head, a circular work support freely rotatable thereon, a knife adjacent saidsupport, a member pivotally mounted on said head, a driven feed wheel carried by said member, spring means urging said wheel into contact with work on said support at a point in advance of the axis of rotation of said circular work support, an edge gage adjacent said support, and a presser foot between the work contacting portion of said feed wheel and said edge gage, said foot being engageable against the margin of said work to prevent its upward curling when said feed wheel is in driving contact with said Work.

5. A machine for operating on rounded sole blanks comprising an edge gage; means for supporting a blank and automatically forcing its edge against said edge gage, said means consisting in a freely rotatable circular disc having a. flat side facing upwardly to provide a work 'support, a driven feed wheel located above said support for peripheral contact with work seated thereon at a point in advance of the axis of rotation of said support; and a knife located above said support in the path of work fed past said gage.

6. A machine for operating on rounded sole blanks comprising an edge gage; means for supporting a blank and automatically forcing its edge against said edge gage, said means consisting in a circular work support freely rotatable about a vertical axis and a driven feed wheel rptatable about a horizontal axis in position .to contact work seated on said support, the axis of said feed wheel being located in advance of the work support axis; and a knife located above said support in the path of work fedpast said gage.

7. A machine for operating on rounded sole blanks comprising a head; an edge gage; means for supporting a blank and automatically forcing its edge against said edge gage, said means consisting in a circular work support freely rotatable on said head about a vertical axis, and a driven feed wheel pivotally mounted on said head and having means clamping it against work seated on said support at a point in advance of the axis of such support; and a knife located above said support inthe path of work fed past said gage.

8. A machine for operating on rounded sole blanks comprising a head; an edge gage on said head; a knife on said head in the path of work fed past said gage; a member pivotally mounted on said head; means for supporting a blank and automatically forcing its edge against said edge gage, said means consisting in a circular work support freely rotatable on said head about a vertical axis and a driven feed wheel mounted on said member for rotation about a horizontal axis in positiorgperipherally to engage work seated on said support at a point in advance of said support axis; and spring means normally urging said wheel toward said support.

WILLIAM C. CARD, JR.

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