US3653087A

US3653087A - Machine for feeding the curved periphery of a workpiece past a work station

Info

Publication number: US3653087A
Application number: US89789A
Authority: US
Inventors: Wladyslaw Typrowicz
Original assignee: Individual
Current assignee: Individual
Priority date: 1970-11-16
Filing date: 1970-11-16
Publication date: 1972-04-04
Anticipated expiration: 1989-04-04

Abstract

A machine for feeding the curved periphery of a sole past a cement applying station. A sensing device is so located that it is intersected by the sole when the side portions of the sole periphery are fed past the station and is not intersected by the sole when the toe portion of the sole periphery is fed past the station. A control causes the sole periphery to be fed past the station at a relatively high speed when the sensing device is intersected by the sole and to be fed past the station at a relatively low speed when the sensing device is not intersected by the sole.

Description

United States Typrowicz 1 Apr. 4, 1972 [72] Inventor:

[73] Assignee: Jacob S. Kamborian, West Newton, Mass.

[22] Filed: Nov. 16, 1970 [21] Appl. No.: 89,789

Wladyslaw Typrowicz, Belmont, Mass.

Kamborian ..12/1 B Ouimet 12/20 Primary Examiner-Patrick D. Lawson Attorney-Albert Gordon [5 7] ABSTRACT A machine for feeding the curved periphery of a sole past a cement applying station. A sensing device is so located that it is intersected by the sole when the side portions of the sole periphery are fed past the station and is not intersected by the sole when the toe portion of the sole periphery is fed past the station. A control causes the sole periphery to be fed past the station at a relatively high speed when the sensing device is intersected by the sole and to be fed past the station at a relatively low speed when the sensing device is not intersected by the sole.

2 Claims, 8 Drawing Figures PATENTEDAPR 4 1972 SHEET 1 OF 6 FIG.

MACHINE FOR FEEDING THE CURVED PERIPHERY OF A WORKPIECE PAST A WORK STATION This invention is concerned with a machine for feeding the curved periphery of a workpiece past a work station at which work is performed on the workpiece. While the illustrative embodiment of the invention discloses a sole being fed to a station where cement is applied to the sole, in its broadest aspects the invention is not so limited. For example, the invention has utility in feeding an insole to a station wherein a welt rib is applied to an insole to make the product disclosed in U.S. Pat. No. 3,493,983.

It is desirable to feed the workpiece periphery past the work station as rapidly as possible so as to complete the machine operation as quickly as possible. However, when portions of the curved periphery having a relatively small radius of curvature are fed past the work station they tend not to swing quickly enough to be in the proper position. Therefore, it has been found desirable to slow the feed speed when these portions are being fed through the work station.

This invention is concerned with a machine that automatically slows down the feeding speed of the workpiece periphery as the portions of the periphery having relatively small radiuses of curvature are moving past the work station. In order to accomplish this, a sensing device is provided that is so located as to be intersected by the workpiece when portions of the workpiece periphery having relatively large radiuses of curvature are being fed past the work station and as to not be intersected by the workpiece when portions of the workpiece periphery having relatively small radiuses of curvature are being fed past the work station. A control is incorporated in the machine that operates to feed the workpiece periphery at a relatively high speed when the sensing device is being intersected by the workpiece and operates to feed the workpiece periphery at a relatively low speed when the sensing device is not being intersected by the workpiece.

In the drawings:

FIG. 1 is a plan view of the machine;

FIG. 2 is a side elevation of the machine;

FIG. 3 is a side elevation of a workpiece feeding means in the machine;

FIG. 4 is a side elevation of a cement extruding mechanism in the machine;

FIG. 5 is a section ofa cement nozzle;

FIG. 6 is a schematic representation of a portion of the machine control circuit;

FIG. 7 is a view of a sole with a ribbon of cement applied thereto by the machine; and

FIG. 8 is a view of the sole being fed past the nozzle.

The operator is intended to stand below the machine as seen in FIG. 1. Directions that extend toward the operator will be referred to as forward" and directions that extend away from the operator will be referred to as rearward. The part of the machine closest to the operator is considered to be the front of the machine and the part of the machine furtherest from the operator is considered to be the back of the machine.

Referring to FIGS. 1 3, the machine comprises a base 10 having a pillar 12 extending upwardly therefrom. A shaft 14, extending vertically through the pillar 12 is connected to a two speed motor 15. The shaft 14 is connected by gearing 16 to a shaft 18 that extends forwardly through and is rotatable in the pillar 12 and a column 20. The column 20 is secured to and extends upwardly of the base 10. A knurled feed roll 22 is secured to the front ofthe shaft 18.

A beam 24 is pivoted to the pillar 12 by pins 26 so as to extend forwardly of the pillar l2 and be vertically swingable about the axis of the pins 26. An air actuated motor 28, secured to the base 10, has an upwardly extending piston rod 30 that is pivotally connected to a lug 32. The lug 32 is secured to the beam 24. A block 34 is secured to the top ofthe front of the beam 24, and a shaft 36 is rotatably mounted in the block 34. The shaft 36 is connected by universal couplings 38 to a shaft 40 that is rotatably mounted in the pillar 12 below the shaft 18. The shaft 40 is connected to the shaft 18 by gearing 42. A feed roll 44 is secured to the front of the shaft 36 and is located below the feed roll 22. An idler roll 46, located forwardly of the feed roll 44, is rotatably mounted in an arm 48 that is attached to the block 34. A pair of

idler guide rolls

50 and 52, rotatable about vertical axes, are also attached to the block 34.

The motor 15 is so connected to the

shafts

18 and 40 that a workpiece gripped between the

feed rolls

22 and 44, in the manner described below, is fed leftwardly as seen in FIG. 1.

Referring to FIGS. 1, 4 and 5, an angle 54 is secured to the base 10 laterally of the pillar 12. A framework 56 is secured to and extends upwardly of the angle 54. An arm 58 is pivoted by a pin 60 to the framework 56 and extends forwardly thereof. A tension spring 62, extending between the arm 58 and the framework 56, serves to yieldably urge the arm 58 downwardly. A bolt 64, threaded into the arm 58, is engageable with the framework to limit the extent of downward movement of the arm 58 under the influence of the spring 62.

A nozzle 66 (FIG. 5) is secured to the front of the arm 58. The nozzle has an orifice 68 that intersects its bottom surface 70. The orifice 68 communicates through

passages

72, 74 and 76 with a hose 78, and the hose 78 is connected to a cement melting and pumping mechanism 80 that is constructed substantially as shown in pending application Ser. No. 17,089 filed Mar. 6, 1970. A valve 82, rotatably mounted in the nozzle 66, has a port 84 that, in one position of the valve, provides communication between the

passages

72 and 74. Upon rotation of the valve 82, the port 84 is brought out of alignment with the

passages

72 and 74 so as to prevent the flow of cement, as described below, through the orifice 68. A lever 86 is pinned to the valve 82 to effect its rotation. The lever 86 is pivoted to a clevis 88, and the clevis 88 is secured to the piston rod 90 of an air actuated motor 92 that is pivotally connected to the arm 58 by a pin 94.

Referring to FIGS. 1 and 2, a table 96 extends forwardly of the base 10 and below the feed roll 22. The table 96 has a cutout 98 to accommodate the

rolls

44, 46, 50 and 52. A tube 100 is mounted to a bracket 102 that is secured to the base 10. A tube 104, mounted to the tube 100, extends upwardly into an orifice 106 in the table 96. A tube 108, mounted to the bracket 102, has a downwardly directed end that is located above the table 96 and is in alignment with the tube 104. The tube 104, the orifice 106 and the tube end 110 comprise a sensing device that is located forwardly of a plane that is tangent to the fronts of the guide rolls 50 and 52 and on the entrance side (right side in FIG. 1) of the feed rolls 22 and 44.

Referring to FIG. 6, pressurized air flows into the tube 108 from a source (not shown). When the space between the tube end 110 and the tube 104 is not blocked or intersected by a workpiece, the air flowing downwardly out of the tube end 1 10 flows through

tubes

104 and 100 to close a pressure operated switch 112. The closure of the switch 112 energizes a coil 1 14 ofa relay 116 to place a switch 118 of the relay in the solid line position to connect a potentiometer 120 with a speed control unit 122 so as to operate the motor 15 and the feed rolls 22 and 44 at a relatively low speed.

When the space between the tube end 110 and the tube 104 is blocked or intersected by a workpiece, the pressurized air does not enter the

tubes

104 and 100, thus enabling the switch 112 to open. The opening of the switch 112 deenergizes the coil 114 so that the switch 118 moves to the position shown in dashed lines to connect a potentiometer 124 with the speed control unit 122 so as to operate the motor 15 and the feed rolls 22 and 44 at a relatively high speed.

In the idle condition of the machine: the motor 15 is rotating the feed rolls 22 and 44; the piston rod 30 is retracted into the motor 28 so that the

rolls

44 and 46 are in a lower position below the top of the table 96; the piston rod 90 is retracted into the motor 92 so that the valve 82 is closed with the port 84 out of alignment with the

passages

72 and 74; and pressurized air is blowing from the tube 108 into the tube 100 to maintain the switch 112 closed so that the feed rolls 22 and 44 are rotating at a relatively low speed.

FIG. 7 shows a shoe sole 126 that is to be coated with cement by the machine. While the cement may be applied along the entire periphery of the sole, FIG. 7 shows it as being applied along the sole periphery from the breastline 128 on one side of the sole around the sole toe portion 130 and back to the breastline 132 on the other side of the sole in the form of a ribbon 134. The sole is placed on the table 96 so that the breastline 128 bears against the guide rolls 50 and 52 and is located between the feed rolls 22 and 44, and the nozzle orifice 68 is located above the sole breast line 128 inwardly of its periphery.

The plane that is tangent to the fronts of the guide rolls 50, 52 acts as a guiding plane for the sole as its periphery is fed past the nozzle 68 in the manner described below. The tube 104 and the tube end 110 are located inwardly of this guiding plane with respect to the sole on the entrance side (right side in FIG. 8) of the feed rolls 22 and 24. Since the side portion of the sole periphery that extends toewardly of the breastline 128 is relatively straight, the placement of the sole on the table 96 with the breastline 128 bearing against the guide rolls 50 and 52 causes the sole to intersect the air flowing from the tube 108 to the tube 100 and thus enables the switch 112 to open and cause the feed rolls 22 and 44 to rotate at a relatively high speed.

The operator now operates a control which causes the mechanism 80, in the manner shown in the aforementioned application Ser. No. 17,089, to pump cement through the hose 78 toward the nozzle 66. This is followed by an actuation of the motor 92 to project its piston rod 90 and thus open the valve 82 by bringing the port 84 into alignment with the

passages

72 and 74 to enable cement to flow from the hose 78 through the nozzle 66. Concomitantly with the actuation of the motor 92, the motor 28 is actuated to project its piston rod 30 and thus raise the

rolls

44 and 46 into engagement with the sole 126.

From the foregoing it can be seen that the sole 126 is caused to be raised off the table 96 and be gripped and fed leftwardly, as seen in FIG. 8, by the rotating feed rolls 22, 44 while the ribbon of cement 134 is pumped through the nozzle orifice 68 onto the sole. Because of the acute angle formed between the feed rolls 22, 44 and the guiding plane that is tangent to the fronts of the guide rolls 50, 52, the sole is urged leftwardly and rearwardly toward the guide rolls while the curved periphery of the sole is being guided leftwardly by the guide rolls. The idler roll 46 helps to support the sole while it is being fed by the

rolls

22, 44. A cut-out 136 (FIG. is formed in the bottom of the nozzle 66 between the orifice 68 and the trailing end (the right end in FIG. 5) of the nozzle to enable the cement pumped through the orifice to be deposited on the sole as the sole is fed past the nozzle. The spring 62 causes the nozzle 66 to be resiliently urged against the sole during the feeding of the sole past the nozzle.

The sensing device constituted by tube 104, orifice 106 and tube end 110 are so located that as the periphery of the toe portion 130 of the sole 126, which has a relatively small radius of curvature, approaches the work station formed by the nozzle 68 the sole stops blocking the sensing device so that pressurized air can flow into the tube and close the switch 112, thus causing the

rolls

22, 44 to rotate at the relatively slow speed and feed the toe portion of the sole periphery past the work station at the relatively slow speed. After the periphery of the toe portion of the sole has passed the work station, the sensing device is again blocked by the sole so that the feed of the sole periphery past the work station is resumed at the relatively high speed.

The sole periphery is fed past the work station at the relatively high speed so that the sole feeding and cement applying operation can take place in as short a time as possible. However, when the periphery of the toe portion 130 of the sole 126 is presented by the feed rolls 22, 44 to the guide rolls 50, 52 at the relatively high speed, the sole has a tendency to not swing quickly enough to enable the sole periphery to stay in continuous engagement with the guide rolls. it is therefore desirable to slow down the sole feeding movement during the movement of the toe end portion of the sole periphery past the guide rolls 50, 52 and the nozzle 66.

When the breastline 132 of the sole approaches the work station, the operator actuates the motor 28 to lower the

rolls

44, 46 to their original position and causes the motor 92 to reclose the valve 82, thus terminating the sole feeding and cement applying operation and enabling the operator to remove the sole from the machine. This is followed by operating the mechanism 80 so as to terminate the pumping of cement into the hose 78. This completes the machine cycle.

Heating means are incorporated in the cement melting and pumping mechanism 80, the hose 78 and the nozzle 66 so that the cement, which is thermoplastic, is deposited on the sole 126 in fluent condition. Before the cement ribbon 134 has had time to solidify, the sole is aligned with the bottom of a lasted shoe and is pressed and secured to the bottom of the shoe in a conventional sole press.

I claim:

1. A machine for feeding the curved periphery of a workpiece past a work station at which work is performed on the workpiece comprising: feed means, operable at a relatively high speed or a relatively low speed, for feeding the workpiece periphery past the station; a sensing device so located that it is intersected by the workpiece when a portion of the periphery having a relatively large radius of curvature is being fed past the station and is not intersected by the workpiece when a portion of the periphery having a relatively small radius of curvature is being fed past the station; control means operable to operate the feed means at the relatively low speed when the sensing device is not intersected by the workpiece; and means responsive to the intersection of the sensing device by the workpiece to cause the control means to operate the feed means at the relatively high speed.

2. The machine as defined in claim 1 further comprising: guide means defining a guiding plane so constructed as to guide the workpiece periphery past the station as it is fed rearwardly towards the guide means by the feed means; and wherein the sensing device is located forwardly of the guiding planeon the entrance side of the feed means.

Claims

2. The machine as defined in claim 1 further comprising: guide means defining a guiding plane so constructed as to guide the workpiece periphery past the station as it is fed rearwardly towards the guide means by the feed means; and wherein the sensing device is located forwardly of the guiding plane on the entrance side of the feed means.