US1585722A - Gripper - Google Patents

Description

May 25 1926.

B. JQRGENSEN GRIPPER Filed Nov. 14, 2 Sheets-Sheet Ma 25,1926. 1,585,722 i B. JORGENSEN GRIPPER Filed Nov. 14, 1922 2Sl1eets-Sheet 2 Patented May 25, 1925.

UNITE 'r'r aren't OFFICE.

BERNHARDT cronomvsnn, or BEVERLY, massacirusn rrs, Assienoarc crusher sacs.

MACHINERY coaroaarion, or Para-neon, new mess A coat-marrow or JERSEY.

GRIZPZPEB.

Application filed November 14, 1922. Serial No. 600,946.

This invention relates to grippers, and is illustrated as embodied in a toe gripper for use in pulling-over machines which include in their organization means forv lasting the toes of shoes. It willbe recognized, however, that in many of its aspects the invention is not limited to grippers for that particular type of machine nor to grippers for pulling the toe ends of uppers In pulling-over machines, and particularly such machines as include toe lasting means, it is desirable that the toe gripper engage the upper materials for a substantial distance about the end of the toe, and to secure the best results the shape of the gripper jaws should approximate as closely as possible the contour of the edge of the last bottom about the toe end of the last. It has been the aim to accomplish this in prior machines by mounting two pairs of gripper jaws for pivotal movement each about an axis at the toe end of the last, so that the angle between them may be changed according to the angle at which the sides of the last converge toward the toe. It is found diiii'cult, however, to swing the pairs of jaws far enough toward each other to approximate at all closely the contour of the toe of a very pointed last, and, moreover, there is a. narrow section of the upper materials at the end of the toe, at the point where maximum pulling-over tension is desired, which is not engaged by either of the pivoted pairs of jaws.

Among its objects, the present invention aims to provide a gripper which may be readily adapted to varying requirements, as in operating on different sizes and styles of shoes, by the substitution of diiierent grip per jaws, thereby rendering it feasible, for example, in pulling the toes of uppers t utilize jaws that are shaped in substantialcon formity to the contour of the edge of the last bottom about the toe end, as herein illustrated, engaging the upper continuously about the end of the toe. In its illustrated embodiment the invention provides, in combination with the gripper casing of a wellknown type of gripper, a pair of gripper jaws so mounted as to be readily detachable as a unit from the casing to permit the substitution therefor of jaws having a different shape. The construction shown comprises a gripper having two readily separable parts, one of which carries the gripper aws and serves as a holder for the jaws and has also mounted therein the usual gripper jaw closing member or slide, the latter being readily disconnectible from the gripper bar which operates it to permit the substitution of adiilferent jaw unit.

The above and other objects and features of the invention, including various novel cornbinations and improved constructions, will be apparent from the following description of one form of my invention shown in the accompanying drawings, in which:

Figure 1 is a front elevation, partly broken away, of a toe gripper;

Fig. 2 is a view, partly in side elevation and partly in section, of the gripper as the parts are positioned in the upper pulling operation Fig. 3 is a perspective view of a detached unit comprising one of the pairs of interchangeable gripper jaws; and

Figs. 4, 5 and 6 are bottom plan views" showing different interchangeable gripper jaws, curved to correspond to the contours of thetoeends of diiierent lasts.

These drawings illustrate the invention in its application to a gripper adapted for use in pulling-over machines of a well-known type, and embodying in its organization characteristic features shown and described in United States Letters Patent No. 1,030,264, granted on June 18, 1912, upon an application of R, F. McFeely, the gripper herein shown having also certain features of construction adapting it for use in pullingover and toe lasting machines as illustrated in Letters Patent No. 1,280,613, granted October 1, 1918, upon an application of Orrell Ashton, and Letters Patent No; 1,379,924, granted upon my prior application on May 31, 1921, p

The illustrated gripper includes an u per part comprising an elongated casing or car'- rier and, for purposes of the present invention, a lower part 22, formed with slidingly interengaging tongue and groove portions, and detachably secured together by a latch 24 (Fig. 1) urged by aleaf s ring 26 through a hole in one side wall oi part 20 into a corresponding socket 28 (Fig. 3) in one side wall of part 22. The upper part 20 is formed with the usual shoulders 30 to en gage the frame of the machine when the gripper is in its initial position. This part or casing is formed by attaching a cover plate 32 to a channeled member 34: by tap screws in the usual manner. As in the construction shown in my above-identified Patent No. 1,379,924, the casing herein shown also forms a support for a toe hold-down 36 operated by a bar 38 slidingly guided by the casing. The hold-down is mounted on an arm 40, pivoted to the bar 38 at 42, and urged toward the casing by a spring a l. Arm 40 is formed with a cut-out portion 46 to engage a part of the sole rest,.as explained in my prior patent.

The upper part 20 incloses and guides a gripper-operating bar 50, arranged to be operated by means of the usual updraw lever (not shown). This bar is recessed to receive a coil spring 52, seating against a stop 5 lcarried by part 20 and yieldingly urging the bar and the casing in opposite directions. The lower end of the bar comprises a fork 56 (Fig. 1) straddling the stop 54, and be tween the arms of the fork is pivotally mounted a latch 58, yieldingly rocked down ward and forward by a spring plunger 60 engaging a stop 62 fixedly mounted between the arms of fork 56.

The lower part or aw holder 22 carries an inner fixed jaw member secured by a bolt 72 and nut 74, and an outer movable jaw member 76, arranged to rock with a pivot pin 78 held in place in the part 22 by a guard 80 locked by nut 7 4:. J aw member 76 is formed with an operating extension 82 having a cam surface engaged by a roll 8% carried by a channel-shaped closing slide 86. This slide is mounted for a limited rectilinear sliding movement in part 22, and is formed with a wedge-shaped cross portion 88 arranged to be engaged by latch 58 releasably to secure the closing slide to the gripper-operating bar. The closing slide also carries a trip device 90 for disengaging latch 58 to release the closing slide, to permit the gripper jaws to open, and also to permit separation of parts 20 and 22 when a different pair of gripper jaws is desired. This device may be operated manually when removing the aws, or just before operating the toe lasting wipers, or it may be operated automatically for opening the jaws by engagement with a moving part of the machine such as the front tacker arm.

In operation, several interchangeable gripper jaw units having jaws of different shapes will be provided, each unit comprising the parts shown in Fig. 3, three pairs of jaws of different shapes being illustrated in Figs. 4, 5 and 6. The operator selects that one of the units having jaws most closely approximating the contour of the toe end of the last in the size and style of shoe upon which the machine is to operate. He then lifts latch 2e against the resistance of spring 26, releases latch 58 by pressing the member 90 inward with one finger sufliciently to clear the cross portion 88 of the closing slide, and after removing the unit previously used pushes the selected unit upwardly until the two parts are detachably secured together by latch 24: and the closing slide and the grip per-operating bar are releasably connected by latch 58.

When the gripper-operating bar is lifted by the updraw lever, the closing slide is lifted by latch 58 to close the gripper jaws on the upper materials of the shoe, and thereafter the entire gripper including the gripper jaws 70, 76, is lifted bodily to pull the upper over the toe end of the last. The casing 20 is held down while the jaws are closing by spring 52. \Vhen the upper materials are engaged by the lasting means trip 90 may be operated manually, or it may be arranged to be operated by engagement with the tacker arm, to permit the lasting operation to be performed by means such as shown in the above-identified Ashton and Jorgensen patents.

\Vhile my invention has been described as embodied in a gripper for a machine for pulling-over and lasting the toes of shoes, it is not my intention to limit its scope by such description, or otherwise than by the terms of the appended claims.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is 1. A gripper for a pulling-over machine comprising, in combination, a supporting carrier, a readily-detachable part mounted thereon, a pair of gripper jaws mounted on said part, and a latch arranged to secure said part in one position only on the carrier and affording a quick release for said part to permit its removal from the carrier.

2. A gripper for a pullingover machine comprising, in combination, a supporting carrier, a separate part carrying gripper jaws, said carrier and part being formed with relatively slidable tongue and groove portions, and a latch for detachably securing the carrier and said part together in a single fixed relation before the gripper is operated.

8. A gripper for a pulling-over machine comprising, in combination, two inter-engaging readily separable parts, a pair of gripper jaws mounted on one of said parts, and gripper-operating means associated with said other part including a latch affording a quickly releasable connection to the gripper jaws.

41:. A gripper having, in combination, two readily separable parts, a pair of gripper jaws mounted on one of said parts, a gripper bar movable in the other of said parts,

and means comprising a latch detachably connecting the gripper bar and gripper jaws.

5. A gripper having, in combination, two readily separable parts, a pair of gripper jaws mounted on one of said parts, a gripper-operating member associated with the other part, and a gripper closing device mounted in the first part and connected to said operating member, the gripper-operating member and the gripper-closing device being constructed and arranged for substantially instantaneous disengagement to perinit said parts to be separated.

(3. A gripper having, in combination, two readily separable parts, gripper jaws and a closing slide carried by one part, and a gripper-operating bar movable in the other part.

7. A gripper having, in combination, two readily separable parts, gripper jaws and a closing slide carried by one part, a gripper-operating bar associated with the other part, and means for releasably connecting the gripper-operating bar and the closing slide.

8. A gripper having, in combination, two readily separable parts, gripper jaws and a closing slide carried by one part, a gripperoperating bar mounted in the other part, a releasable connection between the gripperoperating bar and the closing slide, and a device for tripping said connection to release the closing slide.

9. A gripper having, in combination, two readily separable parts, a gripper-operating connection comprising two corresponding readily separable parts mounted respectively in the different first named parts, and a pair of gripper jaws mounted on one of the firstnamed parts in position to be operated by the corresponding part of said connection.

10. In mechanism of the class described, a supporting member constructed and arranged to carry any one of a plurality of interchangeable gripper jaw units each comprising an assembled pair of aws, a plurality of said units comprising jaws of diiierent shapes, a gripper-operating member in cooperative relation to said supporting member, and means for securing any one of said interchangeable jaw units in operative relation to said gripper operating member.

11. A gripper jaw unit comprising, in combination, a holder constructed and ar ranged to be detachably secured to a gripper casing, a pair of gripper jaws mounted on said holder, and a closing device for said jaws movably mounted within the holder.

12. A gripper jaw unit comprising, in combination, a holder constructed and arranged to be detachably secured to a gripper casing, a pair of gripper jaws mounted on said holder, and a closing slidemounted for rectilinear movement on said holder and having means for effecting relative closing movement of said jaws.

13. A gripper comprising, in combination, an elongated holder casing, a holder for an assembled pair of gripper jaws, said casing and holder having interengaging faces for guiding the holder lengthwise of the casing into predetermined relation to the casing, and means forv detachably securing the holder in such relation to the casing.

14. A gripper comprising, in combination, a casing movable to pull a shoe upper, a holder having a pair of co-operating gripper jaws mounted thereon, and a latch for detachably securing said holder in predetermined relation to the casing.

15. A gripper comprising, in combination, an elongated casing, a gripper jaw holder carried by said casing, a pair of gripper jaws mounted on said holder, a jaw closing member movably mounted on said holder, said holder with its jaws and the jaw closing member being detachable as a unit from the casing, a gripper bar extending length-,

wise of said casing, and a member for detachably connecting said gripper bar to the closing member.

16. A toe gripper for a pulling-over niachine comprising, in combination, a gripper casing constructed to support in operative position any one of a plurality of interchangeable gripper jaw units each comprising a gripper jaw holder and co-operating gripper jaws mounted thereon and curved to conform approximately to the curva-ture of the edge of a last ibottom about the toe, means for detachably securing any one of such units to'the casing to permit units with difierently' curved jaws to be substituted for different styles or sizes of shoes, and mechanism in said casing for closing the jaws and for operating them to pull an upper.

In testimony whereof I have signed my name to this specification.

BERNHARDT J ORGENSEN.

Certificate of Correction.

It is hereby certified that in Letters Patent No. 1,585,722, granted May 25, 1926, upon the application of Bernhardt Jorgensen, of Beverly, Massachusetts, for an improvement in Grippers, errors appear in the printed specification requiring correction as follows: Page 1, line 44:, for the Word end read and; page 3, line 67 claim 13, for the Word holder read hoZZow; and that the: said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 16th day of November, A. D. 1926.

[SEAL] M. J. MOORE,

Acting Commissioner 0 7 Patents.

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