JPH089170B2 - Rubber sheet cooling system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber sheet cooling device.

[0002]

2. Description of the Related Art Generally, when cooling a rubber sheet, a plurality of conveyors for conveying the rubber sheet are provided in the cooling casing inside the cooling casing, and the rubber sheet is passed from the upper conveyor to the lower conveyor. The method of stopping the conveyor and cooling is adopted.

However, if the rubber sheet contracts during cooling, the tension of the rubber sheet may increase and the rubber sheet may break, or the turn portion of the conveyor may be deformed in an arc shape in the width direction and damaged.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a rubber sheet cooling device capable of preventing sheet breakage and conveyor damage.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention is directed to a rubber casing in which a conveyor for conveying a rubber sheet is provided in a plurality of upper and lower stages so that the rubber sheet can be delivered. In the cooling device, detection means for detecting the contraction of the rubber sheet is provided at the discharge end of the rubber sheet of each conveyor except the conveyor at the bottom stage, and when the detection means detects the contraction of the rubber sheet, the conveyor at the bottom stage Each of the conveyors except the above has a configuration including a control means for driving so that the tension of the rubber sheet decreases.

Further, the detection means is composed of a detection arm which is swung by the contraction of the rubber sheet and a detection switch which is operated by the swing of the detection arm.

Cooling of the rubber sheet may be carried out while stopping each of the conveyors, or while driving each of the conveyors at a low speed.

[0008]

[Operation] If the amount of shrinkage of the rubber sheet increases during cooling,
When it is detected by the detection means and each of the conveyors is stopped and cooled, the upper conveyor is driven in the sheet transfer direction, and by the drive, the rubber sheet is transferred from the upper conveyor to the lower conveyor. As a result, the tension of the rubber sheet decreases. Further, when the conveyors are being cooled while being driven at a low speed, the upper conveyor is driven at a higher speed than the lower conveyor,
The tension of the rubber sheet decreases.

When the detection means is composed of a detection arm and a detection switch, the detection arm is swung by the contraction of the rubber sheet, and the detection switch is actuated by the swing of the detection arm to detect the contraction of the rubber sheet. can do.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 and 2 show a first embodiment according to the present invention. As shown in the figure, the rubber sheet G sent out from the kneading roll machine 1 is sent through a receiving conveyor 2 and a supplying conveyor 3 to an inlet 5 provided at one side upper part of the cooling casing 4.

Inside the cooling casing 4, three stages of conveyors, an upper conveyor 6, a middle conveyor 7 and a lower conveyor 8, which extend in the horizontal direction, are provided so that the rubber sheet G can be delivered and fed into the inlet 5. The separated rubber sheet G is received by the upper conveyor 6 and the middle conveyor 7
And is passed to the lower conveyor 8. A leading edge detector 9 that detects the leading edge of the rubber sheet G is provided at the discharge end of the lower conveyor 8, and when the leading edge detector 9 detects the leading edge of the rubber sheet G, the conveyors 6, 7, 8 stop. The feeding of the rubber sheet G is stopped.

Both ends of a circulation duct 10 are connected to the cooling casing 4, and a cooling fan 11 is provided inside the circulation duct 10. The rotation of the cooling fan 11 circulates the air inside the cooling casing 4, and the circulating airflow accelerates the cooling of the rubber sheet G.

The rubber sheet G cooled inside the cooling casing 4 is sent out from the lower conveyor 8 and discharged from an outlet 12 provided at the bottom of the cooling casing 4.
The discharge of the rubber sheet G is performed by the discharge conveyor 13.

Each of the above conveyors 6, 7 and 8 is a net conveyor in which an endless net is laid between a pair of sprockets 14 and 14.

As shown in FIG. 2, a detection arm 15 is swingably supported downward at the discharge ends of the upper conveyor 6 and the middle conveyor 7, and a detection arm 15 is provided at the tip of the detection arm 15. A roller 16 is rotatably attached. A detection switch 17 that operates when the detection arm 15 swings is provided at the discharge ends of the upper conveyor 6 and the middle conveyor 7. When the detection switch 17 provided on the upper conveyor 6 operates, the upper conveyor 6
Are driven in the sheet transport direction. When the detection switch 17 provided on the middle conveyor 7 is activated, the upper conveyor 6
And the intermediate conveyor 7 is driven in the sheet transfer direction.

In the rubber sheet cooling device as described above, when the rubber sheet G shrinks in the portion from the upper conveyor 6 to the middle conveyor 7 while the rubber sheet G is being cooled in the cooling casing 4, the rubber sheet G shrinks. The sheet G contacts the detection roller 16 at the tip of the detection arm 15 provided at the discharge end of the upper conveyor 6, the detection arm 15 swings, and the detection switch 17 operates. Detection switch 1
The upper conveyor 6 is driven in the sheet transfer direction by the operation of 7, and the rubber sheet G is sent from the upper conveyor 6 to the middle conveyor 7, so that the tension of the rubber sheet G decreases.

On the other hand, the middle conveyor 7 to the lower conveyor 8
When the amount of contraction of the rubber sheet G increases in the area up to, the rubber sheet G comes into contact with the detection roller 16 at the tip of the detection arm 15 provided at the discharge end of the middle conveyor 7, and the detection arm 15 swings. Then, the detection switch 17 operates.
The operation of the detection switch 17 drives the upper conveyor 6 and the middle conveyor 7 in the sheet transfer direction, and the rubber sheet G is sent from the upper conveyor 6 through the middle conveyor 7 to the lower conveyor 8, so that the tension of the rubber sheet G decreases. .

In the above embodiment, three conveyors are provided inside the cooling casing, but the present invention is not limited to this.
The number of stages may be arbitrary.

FIG. 3 shows a second embodiment according to the present invention. In this embodiment, a trailing edge detector 18 for detecting the passage of the trailing edge of the rubber sheet G is provided on the supply end portion of the upper conveyor 6, and when the trailing edge detector 18 detects the passage of the trailing edge of the rubber sheet G. The conveyors 6, 7, and 8 of each stage convey the rubber sheet G at a low speed, and cool the rubber sheet G during the conveyance. The rubber sheet G contracts due to cooling,
When the amount of contraction of the rubber sheet G increases from the upper conveyor 6 to the middle conveyor 7, the rubber sheet G contacts the detection roller 16 at the tip of the detection arm 15 provided at the discharge end of the upper conveyor 6, The detection arm 15 swings and the detection switch 17 operates. By the operation of the detection switch 17, the upper conveyor 6 is driven at a higher speed than the middle conveyor 7, and the tension of the rubber sheet G decreases.

On the other hand, the middle conveyor 7 to the lower conveyor 8
When the amount of contraction of the rubber sheet G increases in the area up to, the rubber sheet G comes into contact with the detection roller 16 at the tip of the detection arm 15 provided at the discharge end of the middle conveyor 7, and the detection arm 15 swings. Then, the detection switch 17 operates.
By the operation of the detection switch 17, the upper conveyor 6 and the middle conveyor 7 are driven at a higher speed than the lower conveyor 8 and the tension of the rubber sheet G decreases.

The other structure of the second embodiment is the same as that of the first embodiment.
The description is omitted because it is the same as that of the first embodiment. The same reference numerals are used as in the first embodiment.

[0023]

According to the present invention, as described above, the detection means for detecting the contraction of the rubber sheet is provided at the discharge end of the rubber sheet of the upper conveyor, and when the detection means detects the contraction of the rubber sheet, Since each conveyor except the lowest conveyor is driven so that the tension of the rubber sheet decreases, if the contraction amount of the rubber sheet increases when the conveyors are stopped and cooled, the above-mentioned detection means is used. The tension of the rubber sheet is lowered by being detected and driving each of the conveyors other than the lowermost conveyor to feed the rubber sheet. Further, when each conveyor is being cooled while being driven at a low speed, the conveyor on the upper side is driven at a higher speed than the conveyor on the lower side, so that the tension of the rubber sheet decreases. Lowering the tension on the rubber sheet prevents it from breaking or the conveyor being damaged.

When the rubber sheet is cooled while being conveyed at a low speed, it is possible to prevent the rubber sheet from being bent at the turn portion of the conveyor.

Further, in the case where the detection means is composed of the detection arm and the detection switch, the detection arm is swung due to the contraction of the rubber sheet, and the detection switch is actuated by the swing of the detection arm, so that the rubber sheet Contraction can be reliably detected.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a first embodiment.

FIG. 2 is an enlarged schematic view of a rubber sheet delivery section of the above.

FIG. 3 is a schematic diagram showing a second embodiment.

[Explanation of symbols]

 4 Cooling casing 6 Upper conveyor 7 Middle conveyor 8 Lower conveyor 15 Detection arm 16 Detection roller 17 Detection switch G Rubber sheet

Claims (2)

[Claims] 1. A cooling device for a rubber sheet, wherein a plurality of conveyors for conveying a rubber sheet are provided inside a cooling casing, and the rubber sheets are provided in a plurality of upper and lower stages so that the rubber sheets can be delivered. A detection means for detecting the contraction of the rubber sheet is provided at the discharge end of the, and when the detection means detects the contraction of the rubber sheet, each conveyor except the lowest conveyor is driven so that the tension of the rubber sheet decreases. A cooling device for a rubber sheet, characterized in that it is provided with a control means. 2. The cooling device for a rubber sheet according to claim 1, wherein the detection means includes a detection arm which is swung by contraction of the rubber sheet and a detection switch which is operated by the swing of the detection arm.