JPH10180899A - Supplying method for strip-like member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve an operating efficiency while reducing in size an overall supplying apparatus. SOLUTION: Since the strip-like member 16 is once separated from a molding drum 11, then again approached to the drum 11, and a sheet-like material 35 is obtained from the member 16 in this state, a distance from an end of the material 35 to the drum 11 at the time of finishing cutting becomes short. Further, since the member 16 is approached to the drum 11 after a cutting end 39 is detected, conveyors 12, 13 having short sizes are sufficient.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a feeding method for feeding a sheet material cut into fixed lengths from a continuous band-shaped member to a forming drum while cutting the sheet-shaped material.

[0002]

2. Description of the Related Art In recent years, in the tire industry, in order to improve the production efficiency of a tire, a continuous rubber-like band-shaped member is cut into a sheet-like material one after another at a fixed length immediately before a forming drum. The raw material is supplied to a forming drum and wound one after another to form a green tire.

As a method of supplying such a band-shaped member, the present applicant has previously disclosed in Japanese Patent Application Laid-Open No. Sho 62-60760 a method in which a cutting end of the band-shaped member is fixed by retreating the band-shaped member in a longitudinal direction by a conveyor. And the step of further retreating the band-shaped member even after the detection of the cutting end, and cutting the band-shaped member by the cutter when the distance between the cutter and the cutting end becomes a predetermined length to cut out a sheet-like material. And a step of integrally transporting the sheet-shaped material and the band-shaped member forward by a conveyor and moving the cutting end of the band-shaped member forward from a fixed sensor.

[0004]

However, in such a method, the strip-shaped member is retreated in the longitudinal direction by a conveyor until the cutting end of the strip-shaped member is detected by a fixed sensor, and the method is continued even after the detection of the cutting end. The belt-shaped member is retracted by the conveyor until the distance between the cutter and the cutting tip becomes a predetermined length, and then, the sheet-shaped material is cut out by cutting the band-shaped member by the cutter. The distance from the leading edge of the sheet material to the forming drum is long. As a result, in order to wind the sheet material around the forming drum, the sheet material has to be conveyed for a long distance by a conveyor, resulting in a reduction in work efficiency. There is. In addition, if the retreat is continued after the detection of the cutting end as described above, a long conveyor is required, and there is also a problem that the whole is enlarged.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method of supplying a belt-like member capable of improving work efficiency while reducing the size of the whole.

[0006]

SUMMARY OF THE INVENTION The object of the present invention is to provide a belt-like member which is conveyed by a conveyor in a direction away from a forming drum until a fixed sensor detects the cutting end of the band-like member; Conveying the band-shaped member in a direction approaching the forming drum by a conveyor until the distance between the band-shaped member and the band-shaped member is cut in the width direction by a cutter, and the sheet-shaped material having a predetermined length is removed from the band-shaped member. The cutting step, the sheet-like material and the band-like member are conveyed by a conveyor in a direction approaching the forming drum, the sheet-like material is supplied to the forming drum, and the cutting tip of the band-like member is moved from the fixed sensor to the forming drum side. And a method of supplying a belt-shaped member including the steps of:

[0007] The belt-shaped member whose cutting tip is located closer to the forming drum than the fixed sensor is conveyed by a conveyor in a direction away from the forming drum, and when the cutting tip is detected by the fixed sensor during this conveyance, Stop the transport. Thereafter, the belt-shaped member is conveyed by the conveyor in a direction approaching the forming drum. In this conveyance, the distance between the cutter and the cutting end of the band-shaped member has become a predetermined length, that is, the target length of the sheet-shaped material to be cut out. When to stop.
Next, after the band-shaped member is cut in the width direction by a cutter to cut out a sheet-shaped material of a predetermined length from the band-shaped member, the sheet-shaped material and the band-shaped member are conveyed by a conveyor in a direction approaching the forming drum, and the sheet-shaped material is conveyed. The material is supplied to the forming drum and wound around the forming drum, and a new cutting end of the band-shaped member is moved from the fixed sensor to the forming drum. Here, as described above, after the band-shaped member is once separated from the forming drum, the band-shaped member is approached again to the forming drum, and the sheet-shaped material is cut out from the band-shaped member in this state. The distance from the leading end of the sheet material to the forming drum is shortened. As a result, the conveying distance when the sheet-like material is wound around the forming drum is shortened, and the work efficiency can be improved. In addition, as described above, after the cutting end is detected, the conveyor is brought closer to the forming drum, so that a short conveyor is sufficient, and the whole can be reduced in size.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, reference numeral 11 denotes a tire building drum which can be enlarged and reduced in diameter. The building drum 11 is driven and rotated in the direction of the arrow by a motor (not shown). Behind the forming drum 11, a pair of horizontal conveyors 12, 13 extending in a direction perpendicular to the axis of the forming drum 11 are installed, and each of the conveyors 12, 13 is a roller disposed at a front end side close to the forming drum 11. It comprises a conveyor 14 and a belt conveyor 15 arranged on the rear end side separated from the forming drum 11. These conveyors 12 and 13 convey a continuous band-shaped member 16 unwound from a roll (not shown) toward the forming drum 11, and the inside of the band-shaped member 16 is inclined with respect to the longitudinal direction. Many cords are buried. The roller conveyor 14 includes a frame 17 extending in the front-rear direction, and a plurality of rollers 18 rotatably supported by the frame 17.
Is slightly inclined with respect to the rotation axis of the forming drum 11, and the inclination direction is a direction gradually separating from the rotation axis of the forming drum 11 as the distance from the axial center of the forming drum 11 to the outside in the axial direction increases. A plurality of vertical rollers 19 extending in the vertical direction are supported on the frame 17 located outside the rollers 18 in the axial direction so as to freely rotate around the vertical axis, and these vertical rollers 19 are arranged at a predetermined distance in the front-rear direction. Have been. As a result, when the belt-like member (sheet-like material) 16 moves on the roller conveyor 14, the belt-like member
The belt 16 receives a lateral force from the rollers 18 toward the outside in the axial direction, and the outer ends in the width direction are pressed against the vertical rollers 19, thereby centering the band-shaped members 16. on the other hand,
The belt conveyor 15 is a horizontal frame 21 positioned on an extension of the frame 17, a plurality of rollers 22 supported rotatably on the frame 21 and parallel to the forming drum 11,
Having an endless belt 23 stretched over these rollers 22,
A roller 24 at the rear end has a motor 24
And an encoder 25 for detecting the number of rotations of the motor 24. When the motor 24 operates and the roller 22 rotates, the belt 23 conveys the belt-shaped member 16 forward, that is, toward the roller conveyor 14 and the forming drum 11.

Reference numerals 31 and 32 denote a pair of cutting means for cutting the band-like member 16 in the width direction along the cord. Each of the cutting means 31 and 32 is a gate-shaped frame straddling the belt conveyor 15.
This frame 33 rotatably supports a cutter 34 that moves along the cord. When the cutter 34 moves along the frame 33 while rotating, the band-shaped member 16 on the belt conveyor 15 is cut in the width direction, and a sheet-shaped material 35 having a predetermined length is cut out. 37, 38
Is a fixed sensor, for example, a proximity sensor installed in each belt 23 (between the conveying portion and the return portion of the belt 23) behind the roller 22 located at the front end, and these fixed sensors 37,
Numeral 38 detects an inclined cutting end 39 of the band-shaped member 16, for example, the center in the width direction. Here, it is conceivable to dispose the fixed sensor immediately above the roller located at the front end, but in this case, the fixed sensor occupies the space immediately above the roller. However, if it is installed at a position as in this embodiment, the space in the belt 23 that is a dead space can be effectively used. 41 and 42 are a motor for driving the forming drum 11, a motor 24, an encoder 25, a pair of control circuits connected to the cutting means 31 and 32 and the fixed sensors 37 and 38, and each control circuit 41 and 42 is an encoder 25 and Fixed sensor
Based on the signals from 37 and 38, the forming drum 11, the motor 24,
The operation of the cutting means 31, 32 is controlled.

Next, the operation of the embodiment of the present invention will be described. Now, it is assumed that the cutting end 39 of the belt-shaped member 16 is positioned at the forming drum 11 side from the fixed sensors 37 and 38, in this case, at the front end of the belt conveyor 15, and is stopped. Next, when the motor 24 is operated by a signal from the control means 41 and 42 to cause the belt 23 of the belt conveyor 15 to travel backward, the belt-shaped member 16 is transported by the belt 23 in a direction away from the forming drum 11. . During this conveyance, the cutting end of the band-shaped member 16 is cut.
When the sensor 39 reaches just above the fixed sensors 37 and 38, the fixed sensors 37 and 38 detect the cutting tip 39 and send detection signals to the control circuits 41 and 42, respectively. Thereby, the control circuit 41,
42 stops the operation of the motor 24 to stop the conveyance of the belt-shaped member 16 and starts counting the pulse signal from the encoder 25. In this way, the belt-shaped member 16 is conveyed in the direction away from the forming drum 11 by the conveyors 12 and 13 until the cutting end 39 is detected by the fixed sensors 37 and 38. Next, the motor 24 is operated by a signal from the control means 41 and 42, and the belt-shaped member 16 is transported by the belt 23 in a direction approaching the forming drum 11 from a position shown by a solid line in FIG. When the total of the pulse signals from the encoder 25 reaches a predetermined count number, that is,
When the distance from the cutting line of the cutter 34 to the cutting end 39 of the band-shaped member 16 has reached a predetermined length (the target length of the sheet-like material 35 to be cut out), the control circuits 41 and 42 output signals to the motor 24 and Stop. Next, the cutter 34 is moved along the frame 33 while being rotated, and the strip 16 is cut obliquely in the width direction. As a result, a sheet-like material 35 having a target length is cut out from the belt-like member 16.

Next, the motor 24 is operated by the signals from the control means 41 and 42 to drive the belt 23 so that the cut sheet-shaped material 35 and the strip-shaped member 16 are integrally formed with the forming drum 11.
Conveyed toward. Then, when the front end portion of the sheet material 35 is transferred onto the roller conveyor 14 and the cutting tip 39 reaches the forming drum 11, the conveyance of the sheet material 35 and the band member 16 is temporarily stopped. Next, based on signals from the control means 41 and 42, the forming drum 11 is rotated in the direction of the arrow, and the belt 23 is run by the motor 24 at the same speed as the peripheral speed of the forming drum 11. As a result, the sheet-like material 35 is taken up by the forming drum 11 and, after moving on the roller conveyor 14, is wound around the forming drum 11. At this time, the belt-shaped member 16 is moved in the axial direction from the roller 18 of the roller conveyor 14. In order to receive an outward lateral force, the widthwise outer end is pressed against the vertical roller 19, whereby the belt-shaped member 16 is supplied to the forming drum 11 in a centered state. On the other hand, the belt-shaped member 16 is conveyed in the direction approaching the forming drum 11 by the movement of the belt 23, and this conveyance is performed when the new cutting end 39 of the band-shaped member 16 is closer to the forming drum 11 than the fixed sensors 37 and 38. Stops when the front end of the conveyor 15 is reached. At this time, the rear end of the sheet-shaped material 35 remains on the roller conveyor 14, but the rear end of the sheet-shaped material 35 is formed on the forming drum 11 without receiving extra external force because the roller 18 of the roller conveyor 14 rotates freely. It is taken and wound. Thereafter, the above-described cycle is repeated, and the belt-shaped member 16 is cut one after another at a fixed length to cut out the sheet-shaped material 35, and the cut-out sheet-shaped material 35 is sequentially supplied to the tire forming drum 11 to form a green tire. .

Here, as described above, after the belt-shaped member 16 is once separated from the forming drum 11, the belt-like member 16 is made to approach the forming drum 11 again, and the sheet-like material 35 is cut out from the band-like member 16 in this state. At the end of cutting, the distance from the leading end of the sheet material 35 to the forming drum 11 is reduced,
As a result, the transport distance when winding the sheet material 35 around the forming drum 11 is shortened, and the work efficiency can be improved. Moreover, as described above, the belt-shaped member 16 is made to approach the forming drum 11 after the detection of the cutting tip 39 by the fixed sensors 37, 38, so that the conveyors 12, 13 are also short enough, and the entire feeding device is sufficient. Can be reduced in size.

[0013]

As described above, according to the present invention, the working efficiency can be improved while the overall size is reduced.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing an embodiment of the present invention.

FIG. 2 is a schematic front view thereof.

[Explanation of symbols]

 11 ... Forming drum 12, 13 ... Conveyor 16 ... Band member 34 ... Cutter 35 ... Sheet material 37, 38 ... Fixed sensor 39 ... Cutting tip

Claims (1)

[Claims] A step of transporting the band-shaped member by a conveyor in a direction away from a forming drum until a fixed sensor detects a cutting end of the band-shaped member; and a distance between a cutter and the cutting end becomes a predetermined length. Conveying the belt-shaped member in a direction approaching the forming drum by a conveyor,
Cutting the band-shaped member in the width direction with a cutter, and cutting out a sheet-shaped material of a predetermined length from the band-shaped member, and conveying the sheet-shaped material and the band-shaped member in a direction approaching a forming drum by a conveyor to form the sheet-shaped material Feeding the drum to the drum and moving the cutting tip of the strip to the forming drum side from the fixed sensor.