JPH10226459A - Method and device for supplying linear member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the twisting of a linear member delivered from a drum by smoothly rotating, when the linear member is delivered from the drum, the drum following its delivering since the drum floats together with a loading base. SOLUTION: Compressed air from an air pressure source is supplied to a table unit 10 via an adjust valve and an air pressure tube route. That is, high pressure compressed air is supplied to an annular groove 32 in a base 14 and then supplied from the annular groove 32 to each blow-out hole. The compressed air is blown out from each blow-out hole, a wire drum D floats from the base 14 together with a turntable 22 and thereby resistance against the rotation of the wire drum D is greatly reduced. Thus, when a coating wire is started to be delivered from the wire drum D following the running of a cutter, since the wire drum D is smoothly rotated by a weak force, no excessive tension is applied to the coated wire pulled into the cutter side. Also, no twisting habit occurs in the coated wire.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for supplying a linear member from a drum around which the linear member is wound, and a method and apparatus for supplying the linear member.

[0002]

2. Description of the Related Art For example, in a manufacturing process of a wire harness for an automobile, a supply process of feeding a coated wire as a linear member from a drum to a cutting machine is indispensable. It is designed to cut and then strip the coated wire.

[0003] The above-mentioned coating wire is supplied by feeding the coating wire upward while the drum itself is placed horizontally or by feeding the coating wire while the drum is mounted on a rotating shaft. Has been adopted.

[0004]

In the former coated wire feeding system, when the coated wire is fed, the feeding position of the coated wire relative to the drum rotates and moves along the outer periphery of the drum. It has a habit. Such a twist of the coated wire tends to cause tangling and disconnection of the coated wire, and also makes it difficult to apply stable tension to the coated wire. In order to stabilize the tension of the covering wire, it is necessary to adjust the drawing speed of the covering wire on the cutting machine side, which is a factor of reducing the operating efficiency of the cutting machine. On the other hand, in the latter coated wire supply system, the gravity of the drum itself is extremely heavy, so that it is not easy to mount or replace the drum on the rotating shaft.

The present invention has been made on the basis of the above-mentioned circumstances, and has as its object to facilitate the mounting and replacement of a drum and to cause twisting of a linear member fed from the drum. An object of the present invention is to provide a method for supplying a linear member and a supply device for the linear member without causing the supply.

[0006]

The above object has been achieved by the present invention. According to a first aspect of the present invention, there is provided a method for supplying a linear member, comprising: placing a drum around which a linear member is wound on a mounting table; When the linear member is unreeled from the drum, the drum is rotatably floated together with the mounting table. According to the supply method of the first aspect, when the linear member is fed from the drum, the drum floats together with the mounting table,
The drum is smoothly rotated with the extension. Then, the feeding position of the linear member from the drum is constant in the circumferential direction of the drum.

According to a second aspect of the present invention, there is provided a feeder for a linear member, which is disposed on a base so as to be vertically movable and rotatable so that a drum around which the linear member is wound can be placed horizontally and a base. And a floating means for floating the turntable from above. According to the supply device of the second aspect, when the linear member is fed from the drum, the drum is lifted from the base together with the turntable, and the drum is smoothly rotated together with the turntable with the feeding of the linear member. Therefore, also in this case, the feeding position of the linear member from the drum is constant in the circumferential direction of the drum.

According to a third aspect of the present invention, the levitation means includes pneumatic supply means, and the pneumatic supply means supplies compressed air for levitating the turntable between the base and the turntable. Has become. According to the supply device of claim 3, when the feeding of the linear member from the drum on the turntable is started, compressed air is supplied between the base and the turntable, and the compressed air is supplied from the base to the drum together with the turntable. Is surfaced.

According to a fourth aspect of the present invention, the levitation means further includes a control means for controlling the pressure of the compressed air. In this case, the rotational resistance of the drum is adjusted by controlling the pressure of the compressed air.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, there is shown a part of a manufacturing facility in a wire harness for an automobile, that is, a supply device for supplying a coated wire W to a cutting machine. This supply device has a table unit 10 on which a wire drum D is placed horizontally, and a guide path for guiding a coated wire W fed from the wire drum D is provided between the table unit 10 and the cutting machine. Is provided. Specifically, the guide route includes a plurality of guide sheaves 12.
Consists of The wire drum D is formed by winding a coating wire W around the reel in a layered manner.

As shown in FIG. 2, the table unit 10 has a circular base 14,
Reference numeral 4 denotes a structure in which upper and lower base disks 16 and 18 are attached to each other, and these are mutually connected by a plurality of bolts 19. A center shaft 20 is disposed at the center of the base 14, and the center shaft 20 projects upward from the upper surface of the base 14.

A turntable 22 is arranged on the base 14. The turntable 22 has the same diameter as the base 14, and a central hub 24 is attached to the center shaft 20 via a thrust bearing 26. The hub 24 is attached to the turntable 22 via a plurality of bolts 25. Therefore, the turntable 22 is rotatably attached to the center shaft 20. Also, the hub 2 of the turntable 22
4 is slidably fitted to the thrust bearing 26, whereby the turntable 22 is
Can be moved up and down.

As is apparent from FIG.
Reference numeral 0 also protrudes from the upper surface of the turntable 22, and its upper end is set to be smaller than the inner diameter of the hub 24 although its diameter is larger than the inner diameter of the thrust bearing 26. Therefore, the upper end enlarged diameter portion 28 of the center shaft 20 does not prevent the turntable 22 from moving up and down. The wire drum D has a center hole (not shown),
When the wire drum D is placed horizontally on the turntable 22, the upper end enlarged diameter portion 28 of the center shaft 20 is fitted into the center hole. Therefore, the wire drum D placed on the turntable 22
There is no rattling.

An annular recess 30 is formed on the upper surface of the turntable 22 so as to be concentric with the center shaft 20, and the recess 30 reduces the contact area of the turntable 22 with the wire drum D. The wire drum D can be stably mounted on the base 22. An annular groove 32 is formed in the base 14, that is, on the upper surface of the lower base disk 18, concentrically with the center shaft 20, while a lower surface of the upper base disk 16 communicates with the annular groove 32. Hole 34 is formed. As is apparent from FIG. 3, these holes 34 are provided at six locations at equal intervals in the circumferential direction of the base disk 16. Further, on the upper surface of the upper base disk 16, blowout holes 36 are respectively formed concentrically with the respective holes 34, so that the blowout holes 36 are arranged along the annular groove 32. Each of the outlet holes 36 has a shallow conical shape as is apparent from FIG. 4, and forms a pressure chamber 38 between the upper and lower base disks 16, 18, and the pressure chamber 38 is connected to the annular groove 32 through the hole 34. ing.

Further, a flat surface 40 is formed on a part of the outer peripheral surface of the lower base disk 18, and a connection groove 42 extending from the flat surface 40 to the annular groove 40 on the upper surface of the base disk 18 (see FIG. 2 and FIG. 3).
As shown in FIG. 1, the connection groove 42 has a pneumatic line 44
Is connected to one end, and the other end of the pneumatic line 44 is connected to a pneumatic source 46. The pneumatic source 46 is connected to the pneumatic line 44
Compressed air at a predetermined pressure can be discharged into the inside.

A filter 48, a pressure regulating valve 50, and a high-pressure valve 52 are sequentially inserted in the pneumatic line 44 from the pneumatic source 46 side, and the pressure regulating valve 50 controls the compressed air discharged from the pneumatic source 46 to a predetermined pressure. After adjusting the pressure to the first pressure, the pressure is supplied to the high-pressure valve 52. As is apparent from FIG. 1, the high-pressure valve 52 comprises a three-port two-position electromagnetic switching valve, and when in the rest position (closed position) as shown, the upstream portion of the pneumatic line 44 is shut off from its downstream portion. It is in the state where it was.

One end of a bypass line 54 is connected to the remaining input port of the high-pressure valve 52, and the other end of the bypass line 54 is connected to the pneumatic line 44 on the upstream side of the filter 48. . The pneumatic source 4 is connected to the bypass line 54.
From the 6 side, the filter 56, the pressure regulating valve 58, and the low pressure valve 60
Are sequentially inserted, and the pressure regulating valve 58 regulates the pressure discharged from the pneumatic pressure source 46 to a second pressure lower than the above-described first pressure, and supplies the second pressure to the low-pressure valve 60. The low-pressure valve 60 is constituted by an electromagnetic on-off valve as is apparent from FIG. 1, and closes the bypass line 54 when in the rest position (closed position) shown in the figure. High pressure valve 52 and low pressure valve 6
Numeral 0 is electrically connected to the controller 62, and switches from the illustrated rest position to the operating position (open position) in response to a command from the controller 62.

As shown in FIG. 1, a dancer sheave unit 64 is disposed between the above-described table unit 10 and the cutting machine. A pair of left and right guide sheaves 68 and a center sheave 70 located between the guide sheaves 68 are rotatably supported on respective shafts. A cushion sheave 72 is supported by the standing frame 66 below the center sheave 70 so as to be vertically movable, and has a double structure in which two sheaves are provided coaxially. . Therefore, the covering wire W unwound from the wire drum D on the table unit 10 corresponds to the dancer sheave unit 64 in FIG.
Cushion sheave 72 via guide sheave 68 on the left side of
After being wrapped around one of the sheaves, it is again wrapped around the other sheave of the cushion sheave 72 via the center sheave 70, and is guided to the cutting machine side via the right guide sheave 68. That is, the covering wire W is double hung on the cushion sheave 72.

Further, a limit switch 74 is provided below the standing frame 66. When the cushion sheave 72 is lowered to the lowest position, the limit switch 74 detects the cushion sheave 72 and outputs an ON signal. The ON signal is supplied to the controller 62. The controller 62 controls the high-pressure valve 52 and the low-pressure valve 6 based on the operation signal from the cutter, the on / off signal from the limit switch 72, and the time measurement by the timer.
The switching of 0 is controlled, and the control flow and the timing chart of the switching are shown in FIGS. 5 and 6, respectively. Hereinafter, a method of supplying the covered wire W will be described with reference to FIGS.

First, when the cutting machine is operated (step S1), the controller 62 determines whether an off signal is output from the limit switch 72 (step S1).
2). Here, when the covering wire W is drawn toward the cutting machine in association with the operation of the cutting machine, the cushion sheave 72 of the dancer sheave unit 64 is raised from its lowermost position. As a result of being supplied to the controller 62, the determination result of step S2 becomes true (Yes), and the controller 62 switches the high-pressure valve 52 from the illustrated rest position to the operating position, that is, the open position (see step S3 and FIG. 6). Therefore, at this time, the compressed air from the pneumatic source 46 is supplied to the table unit 10 via the pressure regulating valve 50 and the pneumatic line 44. That is, the high-pressure (first pressure) compressed air is supplied to the base 14.
Is supplied to the inner annular groove 32, and is supplied from the annular groove 32 to each blowout hole 36. As a result, compressed air is blown out from each blowout hole 36, and the wire drum D floats from the base 14 together with the turntable 22, whereby the resistance to the rotation of the wire drum D is greatly reduced. As a result, when the coating wire W starts to be fed from the wire drum D with the operation of the cutting machine, the wire drum D can rotate smoothly with a small force, so that the coating wire W drawn into the cutting machine side is excessively large. No tension is applied. Further, since the covering wire W is paid out from a fixed position when viewed in the circumferential direction of the wire drum D, the covering wire W does not have a twisting habit at the time of drawing.

Thereafter, the controller 62 controls the high-pressure valve 5
2 is switched to the open position, the elapsed time after the switch is switched to the open position is measured, and it is determined whether the time has reached T1 (step S2).
4). When the result of this determination becomes true and the rotation of the wire drum D is stabilized, the controller 62 switches the low-pressure valve 60 from the illustrated rest position to the open position (step S5), and opens the bypass pipe 54. Therefore, in this case, the pneumatic source 46
Is supplied mainly through the bypass line 54, and the compressed air in the bypass passage 54 and the pneumatic line 44 downstream of the pressure regulating valve 58 is reduced by the pressure regulating valve 58 to the second pressure lower than the first pressure. Reduced to pressure. As a result, the force for floating the wire drum D, that is, the turntable 22 is reduced, that is, the rotational resistance of the wire drum D is increased. it can.

Thereafter, the controller 62 determines whether or not the time elapsed since switching the high-pressure valve 52 to the open position has reached T2 (step S6). To the closed position, which is the rest position. Then, the controller 62 determines whether or not the signal from the limit switch 72 is ON (step S8), and if the determination result is true, that is,
When the drawing speed of the covering wire W on the cutting machine side is reduced and the cushion sheave 72 of the dancer sheave unit 64 is lowered to its lowest position by its own weight, the controller 62 switches the low pressure valve 60 to the closed position, and moves to the table unit 10. The supply of compressed air is stopped. Therefore, in this case, since the wire drum D is placed on the base 14 via the turntable 22, the rotational resistance of the wire drum D sharply increases, and its rotation, that is, the feeding of the coated wire W, is performed. Is stopped.

Thereafter, the controller 62 proceeds to step S2.
Is true again, the steps after step 2 are repeatedly executed, and this is continued until the operation of the cutting machine is stopped. Therefore, when operating the cutting machine,
When the feeding of the coating wire W from the wire drum D is started, the floating state of the turntable 22 in the table unit 10, that is, the rotation resistance of the wire drum D is controlled as described above, so that the wire drum D A constant range of tension can be applied to the coated wire W that is fed out, and the supply can be stably performed.

In the dancer sheave unit 64, the covering wire W is doubled between the center sheave 70 and the cushion sheave 72, so that the vertical movement of the cushion sheave 72 becomes gentle, and Wire W
Can be reduced. Furthermore,
The mounting and replacement of the wire drum D on the turntable 22 simply involves placing the wire drum D on the turntable 22, so that the mounting and replacement can be easily performed.

[0025]

As described above, according to the method and apparatus for supplying a linear member according to the first and second aspects, when the linear member is started to be fed from the drum, the drum is caused to float. Therefore, the drum can be smoothly rotated with the extension. Therefore, the feeding position of the linear member from the drum is constant in the circumferential direction of the drum, and the linear member does not have a twisting habit.
At the start of the feeding, no excessive tension is applied to the linear member.

According to the third aspect of the present invention, since the turntable is floated by air pressure together with the drum, the turntable can be levitated with a simple structure. According to this, by controlling the pressure of the compressed air, it is possible to easily adjust the rotation resistance of the turntable, that is, the drum, which determines the tension of the linear member.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing a coating wire supply device.

FIG. 2 is a sectional view of the table unit taken along line II-II in FIG. 3;

FIG. 3 is a plan view of a table unit.

FIG. 4 is a sectional view of the table unit taken along line IV-IV in FIG. 3;

FIG. 5 is a flowchart showing switching control of a high pressure valve and a low pressure valve.

FIG. 6 is a timing chart showing a switching operation of a high pressure valve and a low pressure valve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Table unit 14 Base 22 Turntable 36 Blow-out hole 46 Air pressure source 52 High pressure valve 60 Low pressure valve 62 Controller 74 Limit switch D Wire drum W Insulated wire

Claims (4)

[Claims] 1. A drum, on which a linear member is wound, is placed horizontally on a mounting table, and then, when the linear member is unreeled from the drum, the drum is rotatably floated together with the mounting table. A method for supplying a linear member, comprising: 2. A turntable which is disposed on a base so as to be vertically movable and rotatable, and on which a drum around which a linear member is wound can be placed horizontally, and a floating means for floating the turntable from the base. And a supply device for a linear member. 3. The linear device according to claim 2, wherein the floating unit includes a pneumatic supply unit that supplies compressed air for floating the turntable between the base and the turntable. Equipment for supplying components. 4. The apparatus for supplying a linear member according to claim 3, wherein said floating means further includes a control means for controlling a pressure of compressed air supplied from said pneumatic means.