JP2016137687A - Rolling-out device of rubber strip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rolling-out device of a rubber strip capable of preventing reduction in the molding number caused by sending-out failure of the rubber strip, by preventing a sheet cut caused in a release sheet in winding, when roling out the rubber strip.SOLUTION: A rolling-out device of a rubber strip comprises a separation roller driven by a driving motor, a kicker roller, a counter roller connected to the separation roller and the kicker roller, a winding shaft, and a clutch roller, and is constituted so that the clutch roller is arranged for transmitting rotation of the couter roller to the winding shaft, and when increasing tension applied to a release sheet, the clutch roller slips to the counter roller or the winding shaft, and energization force of energization means reduces, and thereby, the tension applied to the wound release sheet is kept at a predetermined tension.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rubber strip unwinding device that unwinds a rubber strip wound in a roll shape and sends it to the next step in a manufacturing process of a pneumatic tire.

  In the manufacturing process of pneumatic tires, a rubber strip that has been extruded and cooled in a belt shape is wound in a roll shape together with a belt-like release sheet such as a polysheet, and stored in the form of a rubber strip winding body. The The stored rubber strip is then unwound while being peeled off from the release sheet using a rubber strip unwinding device (hereinafter also simply referred to as “unwinding device”) and sent to the next process (for example, Patent Document 1).

  5-7 is a figure which shows the principal part of the unwinding apparatus of the conventional rubber strip, FIG. 5 is a front view, FIG. 6 is a side view, FIG. 7 is a top view. In the figure, i is a guide roller.

  In unwinding the rubber strip, first, the rubber strip A3 with a release sheet is unwound from the rolled rubber strip wound body A set on the material shaft a to the peeling roller c. Next, the release sheet A2 is peeled off from the rubber strip A1 by the peeling roller c, and the rubber strip A1 is sent to the next process via the kicker roller d, while the peeled release sheet A2 is wound around the take-up box e. take.

  At this time, a predetermined tension (tension) is applied to the release sheet A2 by rotating the winding shaft g by the drive motor f (FIG. 6) while braking the rotation of the material shaft a by the brake b (FIG. 7). In a state in which the release sheet A2 is applied, the release sheet A2 is wound around the winding box e.

JP 2007-181931 A

  However, in a conventional unwinding device, a large tension exceeding a predetermined tension is applied, and a sheet break occurs in the release sheet being wound, and the rubber strip with the release sheet attached is sent to the next process. As a result, there was a case where a delivery failure due to an entrainment trouble occurred. If such a rubber strip feeding failure occurs, the number of tires formed may be reduced.

  Therefore, the present invention prevents a sheet from being cut off in a release sheet that is being rolled up when the rubber strip is unwound, and can prevent a decrease in the number of moldings caused by a defective feeding of the rubber strip. It is an object of the present invention to provide an unwinding device.

The invention described in claim 1
The rubber strip wound in a roll with the release sheet is unwound while peeling off the release sheet, and the rubber strip is sent to the next process, and the peeled release sheet is wound around a take-up box. A rubber strip unwinding device for taking
A peeling roller that is driven by a drive motor and from which the rubber strip and the release sheet are peeled off;
A kicker roller for conveying the rubber strip from which the release sheet has been peeled off to the next process;
A counter roller connected to the peeling roller and the kicker roller via an endless chain;
A winding shaft on which the winding box is set;
A clutch roller that transmits the rotation of the counter roller to the winding shaft;
The clutch roller is disposed so as to contact the counter roller and the winding shaft by an urging means and transmit the rotation of the counter roller to the winding shaft,
When the tension applied to the release sheet to be wound is increased, the clutch roller slips with respect to the counter roller or the winding shaft, and the urging force of the urging means is reduced, thereby being wound. The rubber strip unwinding device is configured such that a tension applied to the release sheet is maintained at a predetermined tension.

  According to the present invention, when the rubber strip is unwound, the sheet strip that occurs in the release sheet being wound can be prevented, and a decrease in the number of moldings caused by a defective feeding of the rubber strip can be prevented. An unwinding device can be provided.

It is a front view which shows the principal part of the unwinding apparatus of the rubber strip which concerns on one embodiment of this invention. It is a side view which shows the principal part of the unwinding apparatus of the rubber strip which concerns on one embodiment of this invention. It is a top view which shows the principal part of the unwinding apparatus of the rubber strip which concerns on one embodiment of this invention. It is a figure which shows the principal part in the back surface of the unwinding apparatus of the rubber strip which concerns on one embodiment of this invention. It is a front view which shows the principal part of the unwinding apparatus of the conventional rubber strip. It is a side view which shows the principal part of the unwinding apparatus of the conventional rubber strip. It is a top view which shows the principal part of the unwinding apparatus of the conventional rubber strip.

1. Problems in the Conventional Rubber Strip Unwinding Device Before describing the embodiments for carrying out the present invention, the problems in the conventional rubber strip unwinding device will be specifically described with reference to FIGS. To do.

  As described above, in the conventional unwinding device, since the rotation of the material shaft a is braked by the brake b (FIG. 7), the release sheet A2 is wound in a state where a predetermined tension (tension) is applied. It is wound up on box e.

  And the diameter of the rubber strip winding body A wound in roll shape becomes small as unwinding progresses, but the diameter of the release sheet A2 wound up by the winding box e progresses as unwinding progresses. Conversely, it grows.

  For this reason, at the initial stage of unwinding, there is a risk that a large amount of rubber strip A1 is unwound due to the inertia of rotation of the rubber strip winding body A having a large diameter. In order to prevent this, the brake pressure applied to the material shaft a To suppress the rotation of the material shaft a. However, if the brake pressure is too high, a large tension is applied to the release sheet A2 that is being wound, and sheet breakage may occur.

  On the other hand, at the final stage of unwinding, the release sheet A2 wound in the winding box e is increased in diameter and the winding speed is increased, so that a large tension is applied to the release sheet A2 being wound. There is a risk of running out of sheets.

  Therefore, conventionally, the brake pressure applied to the material shaft a is finely controlled, or the wound release sheet A2 is frequently removed, so that the release sheet A2 being wound has a predetermined size. Although the excess tension was not applied to prevent the release sheet A2 from being cut out of the sheet, it was still not sufficient, and it was a heavy burden on the operator.

2. In order to solve the above problems, the present inventor has developed a rubber strip unwinding device according to the present embodiment having the following structure. . Hereinafter, it demonstrates concretely using FIGS. 1-4.

  1-3 is a figure which shows the principal part of the unwinding apparatus of the rubber strip which concerns on this Embodiment, FIG. 1 is a front view, FIG. 2 is a side view, FIG. 3 is a top view. FIG. 4 is a diagram showing the main part of the back surface of the rubber strip unwinding device according to the present embodiment, where (a) is a front view, (b) is a partial side sectional view, and (c) is FIG.

  As shown in FIG. 1, the unwinding device according to the present embodiment includes a material shaft 1, a peeling roller 6, a kicker roller 7, and a winding shaft 3, as in the conventional unwinding device. ing. A brake 14 (FIG. 3) for adjusting the rotational speed of the material shaft 1 is attached to the material shaft 1. In the figure, 15 is a frame and 16 is a guide roller.

  However, the unwinding device according to the present embodiment is different from the conventional unwinding device in the following points.

  That is, in the unwinding device according to the present embodiment, first, as shown in FIG. 2 and FIG. 3, the winding shaft 3 is not attached with a driving motor, and rotates freely. On the other hand, a driving motor 10 is attached to the peeling roller 6.

  As shown in FIG. 1, a counter roller 8 is provided in addition to the conventional peeling roller 6 and kicker roller 7, and an endless chain 9 is laid on the peeling roller 6, kicker roller 7 and counter roller 8. Has been passed. In addition, the code | symbol 13 in FIG. 3 is a sprocket for spanning the chain 9. FIG.

  Further, as shown in FIGS. 1 and 4, a clutch roller 4 is provided. The clutch roller 4 is urged by an air cylinder 11 as urging means, and is configured to contact both the counter roller 8 and the winding shaft 3.

  With such a configuration, the rotation of the peeling roller 6 rotated by the drive motor 10 is transmitted to the counter roller 8 via the chain 9, and then the rotation of the counter roller 8 is taken up via the clutch roller 4. It is transmitted to the shaft 3.

3. Next, unwinding of the rubber strip using the unwinding apparatus shown in FIGS. 1 to 4 having the above-described configuration will be described.

  First, an operator prepares for starting the unwinding by attaching the rubber strip winding body A to the unwinding device. Specifically, the rubber strip A3 with a release sheet is unwound from the wound rubber strip A set on the material shaft 1 to the peeling roller 6 via the guide roller 16. Then, the release sheet A2 is peeled off from the rubber strip A1 by the peeling roller 6 and the rubber strip A1 is sent to the next process via the kicker roller 7, while the leading edge of the peeled release sheet A2 is passed through the guide roller 16 And wind it around the winding box 12.

  Next, as described above, by rotating the drive motor 10 to rotate the peeling roller 6, the rotation of the peeling roller 6 is transmitted to the kicker roller 7 and the counter roller 8 through the endless chain 9, The kicker roller 7 and the counter roller 8 start to rotate. Then, the rotation of the counter roller 8 is transmitted to the winding shaft 3 via the clutch roller 4, and the winding shaft 3 starts to rotate, and the winding box 12 rotates. As a result, the rubber strip A3 with the release sheet is successively unwound from the rubber strip winding body A so that the rubber strip A1 is sent to the next process, and the release sheet A2 is wound around the take-up box 12. Taken.

  As described above, in the present embodiment, when the release sheet A2 is taken up, the take-up shaft 3 is not directly rotated by the motor as in the prior art, but the rotation of the clutch roller 4 is transmitted. The winding shaft 3 is rotated.

  And since the rotation of the winding shaft 3 is controlled by the clutch roller 4 biased by the air cylinder 11, the release shaft A2 is wound when the brake to the material shaft 1 is too strong. Even at the end of unwinding when the diameter of the release sheet A2 increases, the release sheet A2 can be wound around the take-up box 12 without applying a greater tension than the predetermined value to the release sheet A2, and the occurrence of sheet breakage can be prevented. Can be prevented.

  That is, since the take-up shaft 3 is configured to rotate freely, when the brake to the material shaft 1 is too strong, or at the end of unwinding when the diameter of the release sheet A2 taken up becomes large. In addition, when the tension applied to the release sheet A2 increases, the tension applied to the release sheet A2 causes resistance to the rotation of the take-up shaft 3, and the rotation speed of the take-up shaft 3 decreases, and the clutch roller 4 Slips against the counter roller 8 and the winding shaft 3. And according to generation | occurrence | production of this slip, the urging | biasing force to the shaft 3 for winding by the air cylinder 11 reduces. Accordingly, a large tension exceeding a predetermined tension is not applied to the release sheet A2, and the sheet can be wound while preventing the release sheet A2 from being cut.

  As a result, it is possible to prevent the occurrence of poor delivery due to troubles involving the rubber strip A1 and to appropriately prevent a decrease in the number of molded tires.

  Further, in the apparatus of the present embodiment, as described above, since the release sheet A2 is prevented from being applied with a large tension exceeding a predetermined tension, the brake pressure is initially applied to the material shaft a. Even if the setting is maintained, the rubber strip A1 can be properly unwound to the end without the release sheet A2 being cut.

  Furthermore, since the winding speed that rises as the unwinding progresses can be suppressed in accordance with the tension applied to the release sheet A2, it is not necessary to frequently remove the released release sheet A2. . As a result, unlike the prior art, there is no burden on the operator to cope with the occurrence of sheet breakage, and the safety for the operator can be improved.

  Furthermore, since the peeling roller 6, the kicker roller 7, and the counter roller 8 are connected to each other via the chain 9, the peeling on the peeling roller 6 and the unwinding of the rubber strip A1 by the kicker roller 7 are linked to each other. Thus, the feeding of the rubber strip A1 to the next process and the winding of the release sheet A2 are performed reliably.

  When the unwinding device according to the present embodiment is used, as described above, the rubber strip A1 can be sent out stably without causing a trouble of winding, so that the tire molding process which is the next process can be stably performed. It can be made.

  Further, when a defective tire is molded using the rubber strip A1 in which a trouble has occurred, there is a need to dispose the rubber strip A1 from the defective tire and return it to the previous process, which may lead to a decrease in productivity. However, in the present embodiment, the occurrence of entrainment trouble is prevented, so that the productivity is not lowered.

  In addition, the unwinding device according to the present embodiment can be manufactured by a slight modification in which a commercially available counter roller or clutch roller is incorporated into an existing unwinding device.

  In this embodiment, since both the unwinding of the rubber strip A1 and the winding of the release sheet are performed by one drive motor, the input / output is increased unlike the case where the motors are individually arranged. The control of the motor can be simplified by suppressing the energy consumption in the manufacturing process.

  While the present invention has been described based on the embodiments, the present invention is not limited to the above embodiments. Various modifications can be made to the above-described embodiments within the same and equivalent scope as the present invention.

1, a material shaft 3, g take-up shaft 4 clutch roller 6, c peeling roller 7, d kicker roller 8 counter roller 9 chain 10, f drive motor 11 air cylinder 12, e take-up box 13 sprocket 14, b brake 15 Frame 16, i Guide roller A Rolled rubber strip A1 Rubber strip A2 Release sheet A3 Rubber strip with release sheet

Claims (1)

The rubber strip wound in a roll with the release sheet is unwound while peeling off the release sheet, and the rubber strip is sent to the next process, and the peeled release sheet is wound around a take-up box. A rubber strip unwinding device for taking
A peeling roller that is driven by a drive motor and from which the rubber strip and the release sheet are peeled off;
A kicker roller for conveying the rubber strip from which the release sheet has been peeled off to the next process;
A counter roller connected to the peeling roller and the kicker roller via an endless chain;
A winding shaft on which the winding box is set;
A clutch roller that transmits the rotation of the counter roller to the winding shaft;
The clutch roller is disposed so as to contact the counter roller and the winding shaft by an urging means and transmit the rotation of the counter roller to the winding shaft,
When the tension applied to the release sheet to be wound is increased, the clutch roller slips with respect to the counter roller or the winding shaft, and the urging force of the urging means is reduced, thereby being wound. The rubber strip unwinding device is configured so that a tension applied to the release sheet is maintained at a predetermined tension.

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