US2120337A - Heel attaching machine - Google Patents

Description

June 14, 193s. i LAWSON 2,120,337

HEEL ATTACHING MACHINE Filed Feb. 6, 1957 2 Sheets-Sheet l I Elven/fon' Ziy Jllne 14, 0.1L. LAWSON HEEL ATTACHING MACHINE Filed Feb. 6, 1937 2 Sheets-Sheet 2 [hue/Liar.' @ch 'X 4M Patented June 14, 1938 UNITED STATES Puffi-:1yrv OFFICE HEEL ATTACHING MACHINE Oscar L. Lawson, Lynn, Mass., assignor to National Development Company, Lynn, Mass., a. corporation of Massachusetts Application February 6, 1937, Serial No. 124,435

' 6 Claims. (Cl. 12-125) machine of the invention is particularly adapted for use in conjunction with the method of attaching heels to shoes described in my copending application Serial No. 102,367, led September 24, 1936.

Prior to the present invention it had been common practice to apply a cement to the heel seat of the shoe and the heel and then hold the heel upon the shoe until the cement had dried by either a hand clamp or by a temporary eye bolt which passed through the last over which the shoe was fitted. The eye bolt had to be removed before the last could be removed from the shoe. Both of these procedures were expensive because they involved considerable-time consuming hand labor. The use of the eye bolt necessitated positioning the heel upon the shoe with the shoe right side up and, consequently, it was diicult for the operator to position the heelraccurately upon the shoe.

The present invention contemplates a machine which reduces greatly the time and labor necessary for attaching heels to shoes. The machine of the invention carries a plurality of pairs of cooperating clamping members each pair being adaptedgto clamp and hold a heel upon a shoe under pressure. The construction is such that the shoe is supported upside down While the heel is positioned and cemented upon the shoe. The pairs of clamping members are carried by the machine, preferably, so as to be moved successively from a position where a heel is cemented and clamped upon a shoe and iinally returned to that position. The arrangement is such that the heel is placed under pressure upon the shoe between cooperating clamping members by depressing and releasing a treadle or lever. The clamping pressure is released automatically as the clamping members are returned to the above mentioned position.

The invention will be more clearly understood from the following description in conjunction with the accompanying drawings: in which,

Fig. 1 is a plan view, partly broken away, of a machine embodying the invention.

Fig. 2 is an elevational view of the same, partly broken away and partly in section.

Fig. 3 is a sectional view, taken upon the line 3 3, of Fig. 2.

Fig. 4 is a fragmentary elevational view, partly broken away and partly in section, of a portion of the machine, and

Fig. 5 is a fragmentary detail perspective view of a portion of the machine.

Before explaining in detail the present inven- .tion it is to be understood that the invention is not limited in its application to the details of construction and arrangement of parts illustrated in the accompanying drawings, since the invention is capable of other embodiments and of being practiced or carried out in various ways. Also it is to be understood that the phraseology or terminology employed herein is for the the purpose of description and not of limitation, and it is not intended to limit the invention claimed herein beyond the requirements of the prior art.

A machine embodying the invention as illustrated in the accompanying drawings comprises a frame I0 having a horizontal platform II. A hollow cylindrical boss I2 projects upwardly from the platform I I. A shaft I3 is fitted in and secured to the boss I2 by a screw I4 and extends upwardly for a considerable distance from the platform II. `A sleeve I5 is rotatably mounted upon the shaft I3 and is provided at its lower end with a radially extending ange I6 to which y I9. The plate I8 rests upon and slidably engages the upper end of the boss I2. A plurality of arms 2li extend radially from the outer edge ofthe plate I8 and each carries at its outer end a hollow vertically extending cylindrical guide 2|.

A hollow sleeve 25 is slidably movable within the guide 2l and has secured in its upper end a last support 26 having a spindle 28 adapted to engage a hole 29 in a wood shoe last 36 and support the last together with a shoe upper 3l iitted thereupon. Preferably, the hole 29 in the last 3! extends through the heel part and the last is constructed as described in my copending application, Serial No. 102,366, filed Sept. 24, 1936. A plunger 32 projects into the lower end of the sleeve 25 and is slidably movable therein. A collar 33 is iixed upon the plunger 32 near its lower end and is provided with an ear 34. iA bolt 35 is rotatably `mounted in the ear 34 and is secured to one end of a pawl 36. kThe pawl 36 is prd-` Vided with a tooth 3l near its upper end adapted to engage one of the teeth 3B and 39 formed upon the outer wall of the guide 2 I. A coil spring 40 ispositioned within the sleeve 25 with one end abutting the inner end of the support 26 and its other end abutting Awashers 4I resting upon the inner end of the plunger 32. The tooth 31 upon the pawl 3`is urged into engagement with either of the teeth 38 and 3S by a spring 42.

A block is secured by screws 46 upon the platform near its front edge 41. The block 45 is provided with a groove in its top face for slidably receiving and guiding a slide 48. The slide is held in place by a plate 49 secured upon the top face of the block 45 by screws 50. A curved arm 5| projects from the forward end of the slide 48 and is provided with a cam surface 52. The slide 48 normally is urged rearwardly by a spring 53 having one end secured to the slide and its other end secured to the block 45 by a screw 54. Rearward movement of the slide 48 is limited by a pin 55 projecting therefrom and adapted to engage the front edge of the block 45..

The upper end of the hub l5 is provided with a radially extending fiange 68 to which a plate 6| is secured by bolts 62. Vertical displacement of the plate 68 is prevented by a washer 83 engaging the top of the plate and held in place by a bolt 64 fixed in the upper end of the shaft The plate 6| is provided with a plurality i* the heel portion of the outsole of the shoe 3l.

A shaft 15 is mounted for rotation in suitable bearings in the frame I8. A gear 15 is rotatably mounted upon the shaft 15 and meshes with a pinion 11 fixed upon a shaft 18 which is mounted for rotation in suitable bearings in the frame I8. Power may be supplied from any suitable source to rotate the shaft 18, as by a beltl engaging a pulley 88 fixed upon the shaft 18. The ,hub 8| of the gear 18 is provided with a notch 83 in one face. A cam 84 is fixed upon the shaft 15 and thehub B8 of the cam is provided with an axially extending cavity 81 adapted to slidably receive a pin 88 having a cam surface 89. The pin 88 normally is urged into the notch 83in the hub 8| by a spring 98. A plunger 8| is slidably mounted in a guide 92 carried by a bracket 92 fixed upon the frame i8. The plungcr 8| is provided with a tapered upper end 93 adapted to project between the hubs 86 and 8| into the path of the cam surface 89 on the pin 88. The lower end of the plunger 9| is pivotally lconnected to one end of an arm 94, the other end of which is pivotally connected upon a stud 85 fixed in the frame l. A spring S6, connected at one end to an intermediate point of the arm 94 and at its other end to the frame I8, normally tends to maintain or move the plunger 8| between the hub 8| and the hub 88 into the path of the cam surface 89 on the pin 88. A rod 98 is connected at one end to an intermediate point of the arm 94 and is connected at its other end to a foot treadle (not shown) whereby the plunger 9| may be moved out of the path of the cam surface 89 by depressing the foot treadle and-permit the pin 88 to be forced by the springv 98 into the notch 83 to provide a driving connection between the gear 18 and the cam 84. A lever 99 is pivotally connected at one end upon a stud |80 on a bracket |80 fixed to the frame I and extends forwardly so that its other end is movable into engagement with the lower end of the plunger 32. A roll or cam follower I8! is rotatably mounted upon a stud |82 fixed tc an intermediate point of the lever 99 so that the roll IUI may engage the periphery of the cam 84.

A brake 82 resiliently engages the shaft 15 so as-to stop rotation of the latter when the driving connection to the gear 16 is disconnected.

In the use of the machine for cementing wood heels to shoes, the hub l is rotated to bring one of the arms 28 opposite the front edge 41 of the platform If, in so doing, the tooth 31 happens to be in engagement with the tooth 39 the upper end of the pawl 35 will engage the cam surface 52 on the arm 5| thereby causing the pawl to move rearward against the action ofthe spring 42 and at the same time the arm 5| will be caused to move forward slightly against the action of the spring 53. However, before the upper end of the pawl reaches the end ofthe cam surface 52 the pawl will have been moved rearward so as to bring the tooth 31.out of engagement with the tooth 39 whereupon the spring 48 will cause the rod 32 carrying the pawl 35 to move downward. As the pawl 36 moves downward, the spring 42 will urge it forward and bring the tooth 31 into engagement with the tooth 38 to limit the downward movement of the pawl.

The operator then places the last 33 upon the spindle 28. Cement is then applied to either or both the heel seats of the heel 18 and the outsole of the shoe 3|. The heel 10 is placed upon the outsole of the shoe in its proper position and the sleeve 25 then is allowed to move upwardly by the action of the spring 48 so as to bring the bottom of the heel 18 in engagement with the pad 69. The operator then steps upon the foot treadle to move the rod 98 downward and immediately releases his foot from the foot treadle.A By depressing the foot treadle the operator causes the plunger 9| to move downward out of the path of the pin 88 so as to permit the latter to be moved by the spring 88 into the notch 83 thereby effecting a driving connection between the gear 16 and the cam 84. This causes the cam 84 to rotate one revolution whereupon the cam surface 89 engages the plunger 9| to cause the pin 88 to move out of the notch 83 and disconnect the driving connection between the gear 16 and the cam 84. As the cam 84 rotates its high point is brought into engagement with the roll |0| to lift the free end of the lever 99 and move the plunger 32 upward to compress the spring 48 and cause the latter to press the heel 18 against the pad 69 with substantial pressure. As the plunger'32 is thus moved upward. the pawl 36 is caused to move upward and the tooth 31 is brought into engagement with the tooth 39 to prevent downward movement of the plunger 32 and to maintain the spring 48 compressed. The operator then rotates the hub l5 to bring the next adjacent arm 28 opposite the front edge 41 of the platform II and the above described operations are repeated.

This procedure is repeated until the arm 20 carrying the shoe upon which the first heel was cemented is returned to a position opposite the front edge 41 of the platform l. As this arm 28 approaches this position, the upper end of the pawl 36 is engaged by the cam surface 52 on the arm 5| to move the pawl rearward and bring the tooth 31 out of engagement with the tooth 39 thereby permitting the spring 40 to move the pawl downward and the spring 42 to move the tooth 31 into engagement with the tooth 38. The pressure exerted by the spring 48 is thus relieved so that the operator can move the sleeve 25 downwardly and remove the last 38 and shoe 3|. Another last and shoe is then placed upon the spindle 28 and a heel cemented to the outsole of the shoe.

It will be noted that the machine may carry ten shoes upon which heels have been cemented and that each heel is maintained under pressure in the machine while heels are being cemented upon the remaining nine shoes. During this time the cement has had suflicient time to harden and when each shoe is returned to the position to which the heel was cemented thereon the cement is thoroughly set and the shoe may be removed without danger of displacing the heel.

I claim:

1. An apparatus for attaching heels to shoes comprising stationary and movable portions, said movable portion carrying a pair of cooperating clamping members including pressure applying means associated therewith for holding a heel upon a shoe under pressure, means carried by said stationary portion for actuating said pressure applying means, releasable means carried by said movable portion adapted to hold said pressure applying means in either of a plurality of positions with relation to said clamping members when moved to either of said positions, and means carried by said stationary portion for releasing said releasable means.

2. An apparatus for attaching heels to shoes comprising a pair of clamping members having pressure applying means associated therewith for holding a heel upon a shoe under pressure between said members, means for carrying said clamping members along an endless path to and from a given position therein and permitting said clamping members to remain at rest in said position, means operable at said position for actuating said pressure applying means, and means operable as said clamping members approach said position for releasing said pressure applying means.

3. An apparatus for attaching heels to shoes comprising stationary and movable portions, said movable portion carrying a pair of cooperating clamping members, one of said members carrying a shoe support movable toward and away from the other clamping member, an element movable toward and away from said shoe support between two positions, a spring interposed between said element and shoe support, means carried by said stationary portion for moving said element toward said shoe support from one of its said positions to the other to compress said spring whereby a shoe on said support is pressed against said other clamping member, means carried by one of said clamping members for locking said element in either of said positions to prevent movement thereof by said spring, and means carried by said stationary portion for releasing said locking means when said spring is compressed whereby said element is moved by said spring to the one of its said positions most remote from said support.

4. An apparatus for attaching heels to shoes comprising stationary and movable portions, said movable portion carrying a plurality of pairs of cooperating clamping members, one of the clamping members of each of said pairs carrying a shoe support movable toward and away from the other clamping member, an element movable toward and away from said shoe support between two positions, a spring interposed between said element and shoe support, means carried by said stationary portion for moving said element toward said shoe support from one of its said positions to the other to compress said spring whereby a shoe on said support is pressed against said. other clamping member, means carried by one of said clamping members for locking said element in either of said positions to prevent movement thereof by said spring, and means carried by said stationary portion for releasing said locking means when said-spring is compressed whereby said elementis moved by said spring to the one of its said positions most remote from said support.

5. In an apparatus for attaching heels to shoes, a pair of cooperating clamping members, one of said members carrying a shoe support movable toward and away from the other clamping member, an element movable toward and away from said shoe support between two positions, means for locking said element in either of said positions, and a spring interposed between said element and shoe support whereby a shoe on said support is pressed against said other clamping member when said element is in one of said positions.

6. In an apparatus for attaching heels to shoes, a pair of cooperating clamping members, one of said members carrying a shoe support movable toward and away from the other clamping member, an element movable toward and away from said shoe support between two positions, a spring interposed between said element and shoe support whereby a shoe on said support is pressed against said other clamping member when said element is in one of said positions, means for locking said element in either of said positions to prevent movement thereof in one direction by Said spring.

OSCAR L. LAWSON.

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