US2696613A - Heel attaching machine - Google Patents

Description

Dec. 14,, 1954 Filed Jan. 15, 1953 A. A. RIVINGTON ETAL HEEL ATTACHING MACHINE I 5 Sheets-Sheet 2 In vehtors Arthur/L Piuington Lionel WG. Wilkinson Dec. 14, 1954' A. A. RIVINGTON ETAL 2,695,513

HEEL ATTACHING MACHINE Filed Jan. 15, 1953 5 Sheets-Sheet 4 [n 226- n tori; Arthur A Pivz'nyzon Lionel WG Wilkinson Dec. 14, 1954 A. A. RlVlNGTON ETAL 2,596,613

HEEL ATTACHING MACHINE Filed Jan. 15, 1953 5 Sheets-Sheet 5 [72 van Zors Arthur/4. Pzumgton 3 operator while retaining the work depressed swings the carrier 42 with the work on it rearward into operating position against the stop 47.

It is desirable that when the heel attaching pressure is exerted against the heel seat of the shoe by the heel the mount 78 shall rigidly support the last and accord ingly when the carrier is in its operating position against the stud 47 the valve 70 is held in its closed position, shown in Figs. 3 and 4, by the spring 110, thus 1nsuring that the lower chamber 76, which is filled with oil and is cut off from the upper chamber 86, will act as a hydraulic lock and will support the mount 78 against depression. It will be noted that when the carrier 42 is in its operating position the enlarged cylindrical portion 116 of the spindle 31 is in register with a cylindrical bore or guideway 128 which is formed in the cylindrical projection 48 of the platform '46, the diameter of said cylindrical bore being greater than that of the cylindrical portion 116 of the spindle. The cylindrical guideway 128 may be described as being continuous with the slot 58 which extends into the face 60 of the support. Accordingly, it will be clear that during the attachment of the heel 22 to the shoe 24 the work is supported by the mount 78 through the cone portion of the last 26 and if during the heel attaching operation any substantial pressure is exerted by the plate 40 of the last against the spindle 31, said spindle will yield against the action of the spring 122.

The bell crank lever 68, which is actuated by the cam, face 66 of the platfom 46 to move the valve 70 from its closed position shown in Figs. 3 and 4 to its open position shown in Fig. 5, is secured by a screw 132 to a bearing pin 130 journaled in the mount 78. As best shown in Fig. 6, the valve 70 has secured to its upper end a pair of stepped pins 134 having notches 136 (Figs. and 6) for receiving rounded ends 138 of horizontal arms of the bell crank lever 68. When the carrier 42 is in its rear or operating position against the stud 47 the valve 70 is forced by the spring 110 into its closed position against the conical surface 114 of the mount 78, the vertical arm of the bell crank lever 68 at such time being spaced from the cam surface 66. When the carrier 42 is in its forward or loading and unloading position against the stud 49, the valve 70 has been moved away from the frusto conical shoulder 114 of the mount 78 by the action of the cam surface 66 against the bell crank lever 68, thus permitting oil to flow freely from the lower chamber 75 to the upper chamber 86 to enable the mount to be depressed under pressure of work until the spindle 31 is engaged by the shoulder 39 of the heel plate 40 of the last 26.

The driver is prevented from being rotated in the passage 33 of the spindle 31 by a pin 140 (Fig. 4) which is secured to the enlarged portion 116 of the spindle 31 and fits in an elongated slot 142 of the driver. the carrier 42 is moved between its forward and rear positions the lower end of the driver 30 travels in the slot 58 of the platform 46, through the slot 59 and into the cylindrical bore 128 of the depending projection 48 of the platform 46. plunger 144 which is reciprocated by power in the cylindrical bore 128 of the platform, the upper limit of movement of the driver being approximately constant since for shoes of different sizes and accordingly lasts of different heights, the driver stops substantially at the upper end of the spindle 31. The upper end of the stroke of the driver 30 may be varied if desirable by varying the upper end of the stroke of the plunger, to insert the screw 34 to a desired depth into the work.

The heel clamp comprises an abutment 148 and a fork 150 which are geared together for equal movement in opposite directions and are similar in their construction and operation to corresponding parts of the heel clamp disclosed in United States Letters Patent No. 2,324,- 479, granted July 20, 1943 on an application filed in the name of Francis L. Brandt. The heel clamp 35 is mounted for reciprocation in an upstanding yoke 152 of the machine and is operated through suitable mechanism actuated by a treadle rod 154, for example.

In the attachment of the heel 22 to the shoe 24, the carrier 42 being in its loading and unloading position against the stud or stop 49, the operator places thelast 26, upon which the shoe 24 is mounted upon the spindle 31 with the cone portion of said last in engagement With the last supporting plate 80, and manually depresses When I v The driver 30 is operated by a III the mount 78 until the heel plate 40 of the last engages the upper end of the spindle. The operator then manually swings the carrier 42, with the work thus depressed on said carrier, rearward until the carrier engages the stud 47. While the carrier 42 is being swung rearward the bell crank lever 68 leaves the cam surface 66 thereby allowing the valve 70 to be moved to its closed position under the action of the spring and causing the mount "78 to prevent further downward movement, thus affording support for the last 26 and the shoe mounted upon it when the heel is attached to the shoe.

The heel is then positioned upon the fitted heel seat portion of the shoe and a treadle (not shown) operatively connected to the rod 154 is depressed causing the abutment 148 and the fork of the heel clamp 35 to be forced with equalized pressures against the tread and rear faces respectively of the heel. If during the heel attaching operation any substantial amount of pressure, which would tend to bend the heel plate 40 of the last 26, is exerted against the heel plate, the spindle 31 will yield against the action of the spring 122.

After depressing the rod 154 by the use of the treadle to clamp the heel against the heel seat of the shoe the operator trips a one-revolution clutch (not shown) causing the driver 30 to be raised a fixed distance to drive the fastening 35 through the heel seat of the shoe 24 and into the heel 22, thereby attaching the heel to the shoe. The treadlerod 154 is then released to allow the heel clamp to be moved under the action of a spring (not shown) to its raised starting position, the carrier 42 then being swung forward against the stud 49 preparatory to removing the work from the machine.

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

1. In a heel attaching machine, a carrier movable in an arcuate path between a loading and unloading position on the one hand and an operating position on the other hand, a last spindle and a mount which are arranged in concentric relation in the carrier, means for guiding in said concentric relation the spindle and the mount in the carrier in one direction in parallel paths respectively, when pressure is exerted against them by a last upon which a shoe is mounted, relatively to the carrier and relatively to each other, means for locking the spindle against movement in its path in said one direction with relation to the carrier when said carrier is in its loading and unloading position, means for permitting movement of the spindle in its path in said one direction with relation to the carrier when said carrier is in its operating position, means for locking the mount against movement in its path in said one direction with relation to the carrier when said carrier is in its operating position, and means for permitting movement of the mount in its path in said one direction when the carrier is in its loading and unloading position.

2. In a heel attaching machine, a carrier movable about a fixed axis between a loading and unloading position on the one hand and an operating position on the other hand, a last spindle, a mount, guideways which are concentrically arranged with relation to an axis generally parallel to said fixed axis and in which the spindle and the mount respectively are slidable in one direction relatively to the carrier and relatively to each other when I pressure is exerted against them by a last upon which a shoe is mounted, means for locking in the carrier the spindle against movement 1n said one direction along its guideway when the carrier is 1n its loading and unleading position, means for permitting in the carrier movement of the mount in said one direction along its guideway when the carrier is in its loading and unloading position, means for locking in the carrier the mount against movement in said one direction in its guideway when the carrier is in its operating position, and means for permitting movement of the spindle in said one direction in its guideway relatively to the carrier when the carrier is in its operating position.

3. In a heel attaching machine, a carrier movable in an arcuate path between a loading and unloading position on the one hand and a heel attaching position on the other hand, a hollow last spindle and a mount, means for guiding the spindle and the mount for movement in the carrier in parallel paths respectively, when pressure is exerted against them by a last upon which a shoe is mounted, means for locking in the carrier the spindle against movement in said one direction along its guideway when the carrier is in its loading and unloading position, means for permitting in the carrler movement of the mount in said one direction along its guideway when the carrier is in its loading and unloading position, means for locking in the carrier the mount against movement in said one direction in its guideway when the carrier is in its heel attaching position, means for permitting movement of the spindle in said one direction in its guideway relative to the carrier when said carrier is in its heel attaching position, a clamp for forcing a heel with considerable pressure against the heel seat of the shoe when the carrier is in its heel attaching position, a driver movable through the spindle to drive a screw through the heel seat of the shoe and into the heel for attaching the heel to the shoe, and means for operating the driver.

4. In a heel attaching machine, a platform, a carrier, said carrier being mounted upon the platform for pivotal movement about an axis between a loading and unloading station on the one hand and an operating station on the other hand, inner and outer concentrically arranged guideways formed in said carrier, a mount slidable in the outer guideway, a spindle slidable in the inner guideway, a valve slidable in said mount and arranged in concentric relation to said guideways, means responsive to pivotal movement of the carrier to the loading station for operating said valve to permit the mount acted on by the pressure of the work against it to yield relatively to the carrier and to cause the spindle to be rigidly secured to the carrier, and means responsive to swinging movement of the carrier to said operating station for moving said valve to a position in which the mount is secured against movement with relation to the carrier and the spindle is yieldable relatively to the carrier.

5. In a heel attaching machine, a work support comprising a carrier movable between shoe receiving and heel attaching positions and having a sleeve, which has a central cylindrical bore, and which forms with other parts of the carrier a recess of ring-shaped cross section which is concentric with said bore, a spindle which is slidable in said bore and which is constructed and arranged to be received in a hollow bushing extending heightwise through a last upon which a shoe to which a heel is to be attached is mounted, a valve plunger slidingly mounted on said sleeve and in said recess, a mount which is slidable on said carrier and in said recess and forms with the valve plunger, the spindle and the carrier an upper chamber and which forms with the carrier and the valve plunger a lower chamber, a spring for constantly urging the spindle to a raised position with relation to the carrier, resilient means for constantly urging the mount to a raised position with relation to the carrier, fluid which fills the lower chamber and partially fills the upper chamber, means for locking the spindle against movement in one direction in said bore when the carrier is in its shoe receiving position, means for permitting movement of the spindle in said one direction in said bore when the carrier is in its heel attaching position, and means responsive to movement of the carrier between shoe receiving and heel attaching stations for retaining the valve plunger in open and closed positions respectively in order to permit the mount at the shoe receiving position to be depressed against the action of said resilient means by the last to enable the last to be forced against the spindle then rigidly secured to the carrier and in order to cause the mount at the heel attaching position rigidly to support the last, the spindle at such time being movable under pressure of the last.

6. In a heel attaching machine, a platform having a bore, a power actuated plunger movable lengthwise of said bore, a carrier having a guideway and a stop, a work positioning spindle which has a passage and is movable lengthwise of said guideway, a spring for constantly urging said spindle to a position against said stop, a driver which is movable in the passage of the spindle and is operated by said plunger, a mount slidable in the carrier and arranged in concentric relation with the spindle, hydraulic means for locking the mount to the carrier and for releasing the mount for movement relatively to the carrier, and an actuator which is mounted on and is movable on the carrier and which is adapted to control said hydraulic means, said carrier being pivotally mounted upon the platform for movement between a loading and unloading position on the one hand, and an operating position on the other hand, means for locking the spindle against movement in one direction in said guideway when the carrier is in its loading and unloading position, said actuator being moved to one position in response to movement of the carrier to its loading and unloading position to cause said hydraulic means to allow movement of the mount in said one direction in the carrier under pressure of work slidable on the spindle, and means for permitting movement of the spindle in said one direction in said guideway under pressure of the work when the carrier is in its operating position, said actuator being movable to a second position in response to movement of the carrier to its operating position to cause said hydraulic means to lock said mount against movement in said one direction under pressure of the work.

7. In a heel attaching machine, a platform having a supporting face, a guideway and a slot which is continuous with said guideway and extends into said face, stops secured to the platform, a carrier movable upon said platform between operating and loading positions determmed by said stops respectively, said carrier having a bore which is in register with said guideway when the carrier is in operating position, a spindle movable in said bore, a spring for continuously urging said spindle into a position in which one end of said spindle is in substantial alinement with said face of the platform, a driver movable through the spindle, said carrier having a passage which is concentric with the spindle and the driver, a mount movable along said passage and adapted to support a shoe on a last, hydraulic means for securing the mount against movement in said passage and for permitting movement of said mount in said passage, a cam secured to the platform, said spindle having an abutment face, which is in engagement with said face of the platform when the carrier is in loading position, and being shaped and arranged for reception in a spindle hole extending through the cone of the last until such time as said spindle is engaged by a shoulder of said last, thereby rigidly supporting said last and the shoe mounted on it, means for permitting movement of the spindle against the action of said spring in one direction lengthwise of the bore of the carrier and into the guideway of the carrier when the carrier is in its operating position, and mechanism actuated by said cam for causing, when the carrier is in loading position, said hydraulic means to allow the mount to slide on the carrier, under pressure of the last, to a predetermined position until said shoulder of the last engages the spindle and for causing, when the carrier is in its operating position, the hydraulic means to lock the mount against movement in said one direction on the carrier.

No references cited.

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