US3149354A - Hold-down for lasting machine - Google Patents

Description

p 1964 J. s. KAMBORIAN ETAL 3,149,354

nowmowu FOR LASTING MACHINE Original Filed May 2, 1961 5 Sheets-Sheet l o 7:? w I 58\ INVENTORS .229. Jacob 5. Kamborlan BY Henry v.0. Ben/(en Sept. 22, 1964 J. 5. KAMBORIAN ETAL 3,149,354

HOLD-DOWN FOR LAS'I'ING MACHINE Original Filed May 2, 1961 5 Sheets-Sheet 2 Sept. 22, 1964 J. s. KAMBORIAN ETAL 3,149,354

HOLD-DOWN FOR LASTING MACHINE Original Filed May 2, 1961 5 Sheets-Sheet 3 Se t. 22, 1964 J. 5. KAMBORIAN ETAL 3,149,354

HOLD-DOWN FOR LASTING MACHINE Original Filed May 2. 1961 5 Sheets-Sheet 4 Sept. 22, 1964 J. 5. KAMBORIAN ETAL 3, 4

HOLD-DOWN FDR LASTING MACHINE Original Filed May 2, 1961 5 Sheets-Sheet 5 United States Patent 3,149,354 HOLD-DGWN FOR LAS'TING MACHINE Jacob S. Karnborian, 133 Forest Ave., West Newton, Mass, and Henry v. d. Benken, West Roxhury, Mass; said V. d. Eenhen assignor to said Kamhorian Original appiieation May 2, 1961, Ser. No. 107,156. Di-

vided and this application Aug. 2, 1962, Ser. No.

6 Claims. or. 12-14.2

This application is a division of copending application Serial No. 107,156, filed May 2, 1961.

The parent application discloses an upper stretching and heel seat lasting machine that includes a post pivotally mounted on the piston rod of an air operated motor, a heel seat lasting unit, means for swinging the post toward and away from a heel seat lasting unit, a last support located at the upper end of the post for supporting bottom-up a last having a shoe upper and insole thereon with the heel of the last facing the heel seat lasting unit, an upper tensioning unit mounted on the post having pincers for gripping the toe and forepart portions of the upper and stretching the upper tightly on the last, and a hold-down unit. The heel seat lasting unit comprises a heel clamping pad operative to clamp the upper against the last and wipers for wiping the lasting margin of the upper against the insole. The hold-down unit comprises a heightwise movable hold-down foot operable to bear against the insole and clamp the last and shoe between the last support and the hold-down foot during part of the lasting operation. Means are provided during the wiping operation for raising the hold-down foot away from the insole so that the last and insole are forced directly against the wipers.

The instant invention relates to a hold-down construction which provides an improved arrangement for accomplishing the aforesaid results. The hold-down comprises a hold-down foot that is movably mounted on the machine frame for heightwise movement and a movably mounted cam operable to raise or lower the hold-down foot.

In the accompanying drawings:

FIGURE 1 is a side elevation of the machine;

FIGURE 2 is a front elevation of the machine;

FIGURE 3 is a detail, partly in section, of the holddown unit;

FIGURE 4 is a side elevation of the hold-down unit;

FIGURE 5 is a view taken along the line 5-5 of FIG- URE 4;

FIGURE 6 is a showing of the shoe and last after the insole has been brought to bear against the hold-down foot;

FIGURE 7 is a plan view of the shoe as it is about to be clamped by the heel clamping pad; and

FIGURE 8 is an elevation in section showing the heel portion of the shoe and last at the completion of the machine cycle.

Referring to FIGURES 1 and 2, the machine comprises a frame 10 having an inclined plate 12. An air actuated motor 14, mounted on the plate 12, has a piston rod 16 extending upwardly therefrom that is vertically guided in a guide bearing 18 secured to the frame. A post 26 is pivotally secured to the piston rod 16 by a pivot 22. A rod 24 is received in a socket in the upper end of the post 29. A swivel block 26 is pivotally mounted for swinging movement about the axis of the rod 24. A last pin holder 28 is mounted at the upper end of the rod 24. A last pin 30 is fastened in the last pin holder 28 and projects upwardly thereof. The last pin holder 28 receives a last supporting plate 32 on its upper surface, and the plate 32 has a hole through which the last pin 30 extends. Parallel bars 34 are connected to and extend forwardly of the block 26. An upper tensioning unit 36 is slidably mounted on the bars 34. A pair of air operated motors 38 are connected to the block 26 and have piston rods 46 connected to the upper tensioning unit 36 whereby actuation of the motors will move the unit 36 along the bars 34.

The upper tensioning unit 36 includes a toe rest roller 42, a front pincers 44 and two side pincers 46. An air operated motor (not shown) is provided in the unit 36 to raise and lower the pincers 44 and 46 in unison heightwise of the unit 36.

The post 20 is pivotally connected to a pitman 48. An air operated motor 50, mounted in the frame 10, has a piston rod 52 connected to the pitman 48 by a mechanical linkage that includes a rack 54 and a crank 56 whereby actuation of the motor causes swinging movement of the post 20 about the pivot 22.

A heel seat lasting unit 58 is mounted in the frame 10 rearwardly of the upper tensioning unit 36. The unit 58 comprises a main slide plate 68 (FIGURE 3) slidably mounted for forward and rearward movement in the frame 10. A block 62 (FIGURE 1) is secured to the plate 60, and a floating actuator 64 is secured to the block 62. The floating actuator 64 includes an air operated motor 66 connected to the block 62 by a toggle linkage 68 whereby actuation of the motor 66 causes the main slide plate 68 and the members carried thereby to move forwardly and rearwardly in the frame. A U-shaped heel clamping pad 78 is mounted on the plate 68 and is connected to air actuated motors (not shown) so as to be driven forwardly with respect to the plate in the manner described below. An air operated motor 72, anchored to the plate (FIG- URES 1 and 3) is drivingly connected to Wipers 74 (FIG- URES 2 and 8) mounted above the pad so as to move the wipers in the manner described below.

A hold-down unit 76 is mounted on a frame cover 78 located above the plate 60, the pad 70 and the wipers 74 (see FIGURES 3, 4 and 5). The unit 76 comprises a lever 80 pivoted to a clevis 82 on the cover 78 by a pivot 84. A link 86 is pivoted to the cover 78 below the pivot 84, and both the lever 38 and the link 86 are pivotally connected to a hold-down foot 88. The lever 80, link 86 and foot 88 thus form a parallel linkage mechanism whereby counterclockwise movement of the lever (FIGURE 4) imparts a substantially rectilinear downward movement to the foot 88 and clockwise movement of the lever 81) imparts a substantially rectilinear upward movement to the foot 88.

A pin 90 is rotatably mounted in the cover 78 rearwardly of the pivot 84, and a roller or cam follower 92 is afixed to the pin 98. A roller or cam follower 94 is rotatably mounted in a clevis 96 that is slidably mounted for up and down movement at the rear end of the lever 80 opposite the roller 92. A screw 98 bears against the upper surface of the clevis 96 to limit the upward movement of the clevis 96 in the lever 80.

An air operated spring return motor 189 is secured to the cover '78. The piston rod 162 of the motor 169 has a cam 194 secured thereto that is interposed between the rollers 92 and 94. A tension spring 186 extending from the pin 99 to a pin 188 fixed to the lever 88 urges the roller 94 against the cam 184. The cam 194 has a high portion that is normally interposed between the rollers 92, 94. The actuation of the motor 169 to bring a low portion 112 of the cam between the rollers will cause the spring 1% to move the roller 94, which acts as a cam follower, downwardly against the cam portion 112, swing the lever 88 clockwise, and thereby raise the holddown foot 88, for a purpose that is explained below.

Although the disclosed apparatus can be used to assemble an upper on a last and heel seat last the upper onto the insole, it has particular utility in carrying out the method disclosed in pending application Serial No. 80,- 919, filed January 5, 1961. In the referred to method, a flaccid counter coated on both of its surfaces with ad- 9 hesive is inserted in a pocket formed between an upper and a liner at the heel end of the upper, the upper is draped about the last, tensioning forces are applied at the toe end of the upper to wrap the upper about the heel end of the last and initiate the molding of the counter to the shape of the last, the last is moved to a heel seat lasting position and forced upwardy against a hold-down, upward tensioning forces are applied at the toe end of the upper to assemble the upper on the last, a clamping force is applied at the heel of the last to maintain the upper stationary on the last and to complete the molding of the counter to the shape of the last, and the margins of the upper and counter are wiped down onto an insole located on the bottom of the last to thereby unite the lasted margin of the upper to the insole by adhesively bonding the counter to the upper and insole.

In setting up the machine for a particular size of last, the adjustments described in the parent application are made.

Referring to FIGURES 6, 7 and 8, a last 114 is provided having an insole 116 mounted on its bottom and an upper H8 draped thereon. A liner 124i is secured to the heel of the upper to engage the heel of the last, and a counter 12?. is located in the pocket formed between the upper and the liner. The last is placed bottom-up on the last supporting plate 32 with the pin 39 entering the conventional last pin hole in the last. The toe portion of the upper and last is supported on the toe roller 42, the toe end of the upper margin is inserted between the jaws of the pincers 44, and the forepart portions of the upper margin are inserted between the jaws of the side pincers 46. At this time the upper end of the liner 128 is substantially level with the insole 116 and the upper margins of the counter 1 2 and upper 118 at the heel end of last extend above the insole 116 as indicated in FIG- URE 6.

The control system disclosed in the parent application is now actuated. This causes the pincers 44 and 46 to close and grip the margin of the upper. This is followed by actuation of the motors 38 to cause the upper tensioning mechanism including the pincers 44 and 46 to move forwardly on the bars 34 to thereby horizontally stretch the upper in the direction of the toe of the last and cause a firm wrapping of the upper about the heel of the last and a tension force on the counter to start to mold it to the shape of the last.

The motor 59 is now actuated to swing the post 2% clockwise (FIGURE 1) about the pivot 22 to a position where the shoe is adjacent to but not in engagement with the heel seat lasting unit 58 and the hold-down unit 76. In this position the post 21? is in alignment with the holddown foot 83 but the insole 116 is below the bottom of the hold-down foot. In addition, in this position, the shoe upper and last are not in engagement with the heel clamping pad 73.

The motor 14 is now actuated to cause it to raise the post 26 and thus raise the last and shoe until the insole 116 bears against the hold-down foot 88. In this position the shoe and last are clamped between the hold-down foot 88 and the last supporting plate 32, as indicated in FIGURE 6, with the upwardly facing surface of the insole slightly below the top surface of the clamping pad 7% and the bottom surfaces of the wipers 74.

The pincers 44 and 46 are now raised in unison to thereby apply an upward tension to the margin of the upper 118 at its toe end and forepart portions to thereby stretch the upper tightly on the last and assemble it in proper position for the subsequent heel seat lasting operation. Since the last and shoe are clamped at this time between the foot 38 and the plate 32, upward movement of the pincers does not shift the last.

The motor 66 is now actuated to cause the toggle linkage 68 to move the block 6% and the heel seat lasting unit 58 carried thereby from its normal out-of-the-way position to a position adjacent the shoe and last. This is followed by a forward movement of the clamping pad 70 toward the heel of the last. The driving means for the pad 79 is so constructed that the pad moves forwardly in the open, solid line position of FIGURE 7 until the bight of the pad engages the shoe after which the legs of the pad move toward each other and engage the shoe as indicated in dotted lines in FIGURE 7.

After the pad 78 has been brought against the shoe, the motor 72 is actuated to cause the Wipers 74 to move forwardly and inwardly and wipe or fold the margins of the upper 118 and counter 122 down against the insole 116. The wiping pressure completes the molding of the counter and causes the counter, through the adhesive on its surfaces, to bond the wiped-in margin of the upper to the insole. During this movement of the wipers, the motor is actuated to move the cam 1G4 forwardly to present the low cam portion 112 between the rollers 2, 94 and thus cause the raising of the hold-down foot 88 as indicated in PTGURE 8. The motor 14 now applies upward pressure by the last directly against the wipers to provide an overwiping and bedding pressure between the wipers and the wiped-in margin of the upper during the latter part of the wi er stroke and also after the termination of the wiper stroke.

This concludes the work phase of the machine cycle, and the control is now actuated to return the machine parts to their original positions.

It should be understood that the present disclosure is for the purpose of illustration only and that this invention includes all modifications and equivalents which fall within the scope of the appended claims.

We claim:

1. A hold-down comprising: a frame; a lever pivoted to the frame between its ends; a hold-down foot pivoted to one end of the lever and depending downwardly therefrom; a link extending alongside the lever and pivoted at its ends to the frame and the hold-down foot; a cam follower connected to the bottom of the lever at the end of the lever remote from the hold-down foot; a movably mounted profiled cam positioned beneath the cam follower; means for yieldably urging the cam follower against the cam; and means for moving the cam relative to the cam follower.

2. A hold-down comprising: a frame; a lever pivoted to the frame between its ends; a hold-down foot pivoted to one end of the lever and depending downwardly therefrom; a link extending alongside the lever and pivoted at its ends to the frame and the hold-down foot; a first cam follower slidably mounted for heightwise movement in the end of the lever remote from the hold-down foot; a second cam follower mounted below the first cam follower; a movably mounted profiled cam interposed between the cam followers; and means for yieldably urging the first cam follower against the cam.

3. The hold-down according to claim 2 further comprising: a screw threaded into the lever above the first cam follower and bearing thereagainst.

4. A hold-down comprising: a frame; a lever pivoted to the frame between its ends; a hold-down foot pivoted to one end of the lever and depending downwardly therefrom; a link extending below the lever and pivoted at its ends to the frame and the hold-down foot; a clevis slidably mounted for heightwise movement in the end of the lever remote from the hold-down foot; a first roller rotatably mounted in the clevis; a second roller mounted in the frame below the first roller; a fiuid actuated motor mounted on the frame having a piston rod extending therefrom; a profiled cam connected to the piston rod and interposed between the rollers; and a tension spring extending from the lever to the frame adjacent the rollers.

5. A hold-down comprising: a frame; a lever pivoted to the frame between its ends; a hold-down foot pivoted to one end of the lever and depending downwardly therefrom; a link extending alongside the lever and pivoted at its ends to the frame and hold-down foot; a first cam is a follower mounted in the end of the lever remote from the hold-down foot; a second cam follower mounted below the first cam follower; a movably mounted profiled cam interposed between the cam followers; and means for yieldably urging the first cam follower against the cam.

6. A hold-down comprising: a frame; a lever pivoted to the frame between its ends; a hold-down foot pivoted to one end of the lever and depending downwardly therefrom; a link extending below the lever and pivoted at its ends to the frame and the hold-down foot; a clevis mounted in the end of the lever remote from the holddown foot; a first roller rotatably mounted in the clevis; a second roller mounted in the frame below the first roller; a fluid actuated motor mounted on the frame hav- 15 & ing a piston rod extending therefrom; a profiled cam connected to the piston rod and interposed between the rollers; and a tension spring extending from the lever to the frame adjacent the rollers.

References Cited in the file of this patent UNITED STATES PATENTS 938,513 Pym Nov. 2, 1909 1,010,800 Pym Dec. 5, 1911 1,060,477 Meyers Apr. 29, 1913 2,989,931 Gilbride Apr. 25, 1961 FOREIGN PATENTS 400 Great Britain of 1911

Claims (1)

1. A HOLD-DOWN COMPRISING: A FRAME; A LEVER PIVOTED TO THE FRAME BETWEEN ITS ENDS; A HOLD-DOWN FOOT PIVOTED TO ONE END OF THE LEVER AND DEPENDING DOWNWARDLY THEREFROM; A LINK EXTENDING ALONGSIDE THE LEVER AND PIVOTED AT ITS ENDS TO THE FRAME AND THE HOLD-DOWN FOOT; A CAM FOLLOWER CONNECTED TO THE BOTTOM OF THE LEVER AT THE END OF THE LEVER REMOTE FROM THE HOLD-DOWN FOOT; A MOVABLY MOUNTED PROFILED CAM POSITIONED BENEATH THE CAM FOLLOWER; MEANS FOR YIELDABLY URGING THE CAM FOLLOWER

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