JP5749045B2 - Rubber member conveyor - Google Patents

Description

  The present invention relates to a transport device that transports a belt-shaped rubber member.

  Unwinding means in which a belt-shaped rubber member is wound, a festoon portion provided in a conveyance path in which the rubber member unwound from the unwinding means is conveyed, a conveyor for conveying the rubber member via the festoon portion, 2. Description of the Related Art A rubber member conveying device including a winding means on which a rubber member sent by a conveyor is wound is known (for example, see Patent Document 1).

JP 2005-247490 A

When the conveyor is constituted by a roll conveyor constituted by a plurality of driven rolls, the driven roll is not configured to rotate by a rotational drive source such as a motor, but can only rotate by contact with a rubber member. The friction caused by the contact between the driven roll and the rubber member is increased, and the rubber member may be stretched.
The present invention provides a rubber member conveying device capable of suppressing the elongation of a rubber member.

A rubber member conveying device according to the present invention includes an unwinding unit in which a belt-shaped rubber member is wound, a festoon unit provided in a conveyance path through which the rubber member unwound from the unwinding unit is conveyed, and a festoon unit In a rubber member transport device comprising: a transport roll unit having a plurality of rolls for transporting a rubber member that passes through, a winding means around which a rubber member sent by the transport roll unit is wound, and a control device The roll provided at the position closest to the festoon portion among the plurality of rolls constituting the transport roll portion is a drive roll that rotates by receiving the rotational drive force from the rotational drive source, and the control device is a peripheral speed of the drive roll. the, than that controls the rotational drive source of the drive roll to be lower than the winding speed of the building drum, the drive roller and friction due to contact with the rubber member is reduced, festoon unit and driving low It can be suppressed that the tension is exerted by its own weight on the rubber member between the can suppress elongation of the rubber member.

Configuration diagram showing a transport device (Embodiment 1) The top view which shows a belt member (Embodiment 1). The perspective view which shows a conveyance roll part (Embodiment 1).

Embodiment 1
As shown in FIG. 1, the rubber member conveying device 1 includes an unwinding roll 2 as an example of an unwinding means, a molding drum 3 as an example of a winding means, a conveying path 4, and a speed control mechanism 5. Is provided.

The unwinding roll 2 has a configuration in which a belt member 7 as an example of a belt-shaped rubber member is wound around a winding shaft 2a in a roll shape.
The winding shaft 2a is rotatably supported by a support member 9 installed on the floor 8, and rotates in a direction in which the belt member 7 is unwound by receiving a rotational driving force from a rotational driving source 10 such as a motor.
A belt member 7 wound around a winding shaft 2a is a rubber member with a built-in cord formed by coating raw rubber on a cord 11 such as a steel cord or an organic fiber cord by an extrusion rolling device called a calender device. It becomes a component part. Since the belt member 7 is in a raw rubber state, it may be plastically deformed when it is extended. Therefore, it is highly necessary to suppress the elongation of the belt member 7.
The angle α formed between the orthogonal line 7b orthogonal to the center line 7a along the longitudinal direction of the belt member 7 and the cord 11 is called a cord angle and is determined by the required performance of the tire (see FIG. 2).

The molding drum 3 has a circumferential surface 16 around which the belt member 7 unwound from the unwinding roll 2 and conveyed via the conveying path 4 is wound via the carcass member 15. It is a rotating body having a circular cross section that rotates around the center of the circle.
A carcass member 15 that is a tire component is first wound around the circumferential surface 16 of the molding drum 3, and the belt member 7 is wound around the carcass member 15.
When the carcass member 15 and the belt member 7 are built with a metal cord such as a steel cord as the cord 11, the circumferential surface 16 of the molding drum 3 is wound around the circumferential surface 16. A magnet (not shown) for adsorbing the cord 11 of the carcass member or belt member 7 and sticking the carcass member or belt member 7 on the circumferential surface 16 is provided.
The rotation center shaft 3a of the molding drum 3 is rotatably supported by a support member 17 installed on the floor 8, and rotates in a direction in which the belt member 7 is wound by receiving a rotational driving force from a rotational driving source 18 such as a motor. To do.
The winding speed of the molding drum 3 is set in the range of 0.5 rpm to 30 rpm, for example.

  The transport path 4 includes a peeling unit 21, a festoon unit 22, a transport roll unit 23, and a belt member cutting device 24.

After the unwinding end 7t of the belt member 7 unwound from the unwinding roll 2 is attached to the winding start end mounting portion 3b of the molding drum 3 via the festoon portion 22 and the transport roll portion 23, the unwinding roll 2, the rotational drive source 18 of the molding drum 3, and the rotational drive sources 60; 61; 62 of drive rolls to be described later are activated, whereby the belt member 7 is placed on the circumferential surface 16 of the molding drum 3. It is wound several times.
That is, the belt member 7 is conveyed from the unwinding roll 2 to the molding drum 3 via the festoon part 22 and the conveying roll part 23 so that the longitudinal direction of the band of the belt-shaped belt member 7 coincides with the conveying direction. It is wound around the molding drum 3.
The closer the cord angle α of the belt member 7 is to 0 °, the easier the belt member 7 extends in the longitudinal direction when tension in the direction along the longitudinal direction is applied to the belt member 7 in the winding process of the belt member 7. When the belt member 7 extends in the longitudinal direction, the cord angle α of the belt member 7 becomes larger than the initial value, the belt member 7 contracts in the width direction, and the width dimension of the belt member 7 is from W1 to W2 in the initial state. (See FIG. 2).

The peeling means 21 is detachably attached to one belt surface 7f of the belt member 7 so that the belt surfaces of the belt member 7 wound around the winding shaft 2a of the unwinding roll 2 do not stick to each other. It is means for peeling off the surface contact preventing member 25 such as a polyethylene film or the like which is not shown.
For example, the peeling means 21 peels the surface contact preventing member 25 from one belt surface 7f of the belt member 7 and the belt member 7 peels from the one belt surface 7f by the peeling portion 26 from one belt surface 7f. And a surface contact prevention member winding means 27 for winding the surface contact prevention member 25. The surface contact preventing member winding means 27 includes a winding shaft 27a that is connected to one end of the belt-shaped surface contact preventing member 25 and winds up the surface contact preventing member 25, and a rotational drive source (not shown) of the winding shaft 27a. . The winding shaft 27 a is rotatably supported by a support member 29 installed on the floor 8. The peeling part 26 is supported by a support member (not shown) connected to the support member 29, for example.

The festoon portion 22 is a mechanism provided in the conveyance path 4 through which the belt member 7 is conveyed. When the belt member 7 is unwound from the unwinding roll 2 and wound around the forming drum 3, the unwinding roll 1 One end (winding end) is unwinding roll 2 so that an excessive tensile force or an excessive compressive force is not applied to belt member 7 due to a difference in speed between the unwinding speed of the forming drum 2 and the winding speed of molding drum 2. A function for adjusting the tension of the belt member 7 supported at both ends with the other end (winding start end 7s) attached to the molding drum 3 to a predetermined appropriate value, and the transport roll unit 23. This is a mechanism having a function for keeping the belt member 7 waiting in the preceding stage.
The festoon portion 22 includes a carry-in side drive roll 31 supported by a support member 31 a installed on the floor 8 and a carry-out side drive roll 32 supported by the support member 31 a installed on the floor 8.
The rotation center shaft 31c of the carry-in side drive roll 31 is rotatably supported by a support member 31a installed on the floor 8, and rotates in response to a rotation drive force from a rotation drive source 60 such as a motor.
The rotation center shaft 32c of the carry-out side drive roll 32 is rotatably supported by a support member 32a installed on the floor 8, and rotates in response to a rotation drive force from a rotation drive source 61 such as a motor.
When the belt member 7 includes a metal cord such as a steel cord as the cord 11, the festoon portion 22 includes a magnet path 33. The magnet path 33 includes, for example, an entrance side magnet path 33a provided in the support member 31a and an exit side magnet path 33b provided in the support member 32a.

The unwinding end 7t of the belt member 7 unwound from the unwinding roll 2 moves downward after passing through the loading-side drive roll 31 and then moves upward to pass through the unloading-side drive roll 32, and the transport roll unit The belt member 7 is set in a suspended state between the carry-in side drive roll 31 and the carry-out side drive roll 32 by being attached to the winding start end attachment portion 3b of the molding drum 3 through the roll 40 of the roll 23. The
The entrance-side magnet path 33a is configured to adsorb a metal cord as the cord 11 inside the belt member 7 that passes through the carry-in side drive roll 31 and hangs downward to stably convey the belt member 7.
The exit-side magnet path 33b is provided so as to face the entrance-side magnet path 33a, and adsorbs the metal cord inside the belt member 7 that has passed through the entrance-side magnet path 33a to stabilize the belt member 7 up to the carry-out side drive roll 32. It is the structure for making it convey.

The transport roll unit 23 forms a transport path between the festoon unit 22 and the molding drum 3.
The conveyance roll part 23 is comprised by the roll conveyor apparatus provided with the some driven roll 40, the drive roll 50, and a pair of support side board 41; 41 (refer FIG. 3).
The support side plate 41 is supported by a support member 42 installed on the floor 8.
The support side plate 41 includes an upper inclined portion 46 that is inclined upward (ceiling side) from the festoon portion 22 side toward the molding drum 3 side, and downward from the uppermost position 46t of the upper inclined portion 46 toward the molding drum 3 side ( A downward inclined portion 47 inclined to the floor side is provided.
The driven roll 40 and the drive roll 50 include a cylindrical or columnar roll main body 51 and a rotation center shaft 52 that protrudes from the center of a circle on both circular end faces of the roll main body 51.
Both ends of the rotation center shaft 52 of the driven roll 40 and the drive roll 50 of the pair of rotation support side plates 41; 41 provided so that the surfaces face each other in parallel are rotatably supported.

A plurality of driven rolls 40 and drive rolls 50 are arranged at regular intervals along the longitudinal direction of the pair of support side plates 41; 41. As a result, a roll conveyance path 49 composed of a plurality of rolls 40 and drive rolls 50 has an upper inclined roll conveyance path 49a inclined upward (ceiling side) from the festoon 22 side toward the molding drum 3 side, and an upper The inclined roll conveyance path 49a includes a lower inclined roll conveyance path 49b that is inclined downward (floor side) from the uppermost point toward the molding drum 3 side.
In the driven roll 40, the belt body 7 is transported to the molding drum 3 side while the belt surface of the belt member 7 is in contact with the outer peripheral surface of the roll body 51 of the plurality of rolls 40, whereby the roll body 51 moves the rotation center shaft 52. The rotation center shaft 52 is rotatably supported by the support side plates 41; 41 so as to be rotatable as a rotation center. That is, the driven roll 40 is not a drive roll in which the rotation center shaft 52 is rotated by receiving a rotation drive force from a rotation drive source such as a motor, but is configured to be rotatable by receiving an external force on the outer peripheral surface of the roll body 51. The follower roll.

The drive roll 50 is installed at a position closest to the carry-out side drive roll 32 of the festoon unit 22. That is, the drive roll 50 is a roll provided at a position closest to the festoon part 22 among a plurality of rolls constituting the transport roll part 23. In other words, the roll positioned on the most upstream side of the conveyance path in the conveyance path formed by the plurality of rolls constituting the conveyance roll unit 23 is the drive roll 50.
A rotation center shaft 52 of the drive roll 50 is rotatably supported by the support side plates 41; 41, and is connected to a rotation shaft 63 of a rotation drive source 62 such as a motor via a connection member 64 such as a coupling, and is driven to rotate. It receives the rotational driving force from the source 62 and rotates.
The drive roll 50 rotates in response to the rotational driving force from the rotational drive source 62, and the outer peripheral surface of the roll main body 51 comes into contact with the belt surface of the belt member 7 to convey the belt member 7 to the molding drum 3 side.

  Each time the belt member 7 is wound on the carcass member 15 wound around the circumferential surface 16 of the molding drum 3, the belt member cutting device 24 removes the wound belt member 7 from the belt on the conveyance path side. This is a device for cutting the belt member 7 in order to separate it from the member 7. The belt member cutting device 24 is supported by a support member (not shown) installed on the floor 8.

The speed control mechanism 5 includes an unwinding speed detector 56 that detects the unwinding speed of the unwinding roll 2, a winding speed detector 57 that detects the winding speed of the molding drum 3, and a control device 58.
The control device 58 inputs the speed value detected by the unwinding speed detector 56 and the unwinding speed detector 57 so that the unwinding speed of the unwinding roll 2 and the unwinding speed of the molding drum 3 become the same. The rotary drive source 10; 18 is controlled.
When the unwinding speed of the unwinding roll 2 is faster than the unwinding speed of the molding drum 3, the control device 58 lowers the lower end position 7e of the belt member 7 between the carry-in side drive roll 31 and the unloading side drive roll 32. , The rotational drive sources 60; 61 of the carry-in side drive roll 31 and the carry-out side drive roll 32 are controlled so as to move downward.
When the unwinding speed of the unwinding roll 2 is slower than the unwinding speed of the molding drum 3, the control device 58 lowers the lower end position 7e of the belt member 7 between the carry-in side drive roll 31 and the unloading side drive roll 32. The rotational drive sources 60 and 61 of the carry-in side drive roll 31 and the carry-out side drive roll 32 are controlled so that the upper side moves.
As described above, the belt member 7 is positioned across the festoon portion 22 and the molding drum 3, and one end is supported by the festoon portion 22 and the other end is supported by the molding drum 3. The tension applied in the longitudinal direction of the belt member 7 is adjusted by the festoon portion 22 to be constant and small.
Further, the control device 58 is detected by the winding speed detector 57 so that the circumferential speed of the drive roll 50 is equal to or less than the winding speed of the molding drum 3. The rotational drive source 62 of the drive roll 50 is controlled based on the obtained speed value. That is, the drive roll 50 has a role of assisting the conveyance of the belt member 7.
Thus, by controlling the peripheral speed of the drive roll 50 and the winding speed of the molding drum 3, it is possible to prevent the belt member 7 from becoming loose between the drive roll 50 and the molding drum 3.

  That is, in the transport device 1, after the unwinding end 7 t of the belt member 7 unwound from the unwinding roll 2 is attached to the winding start end mounting portion 3 b of the molding drum 3 via the festoon portion 22 and the transport roll portion 23. The control device 58 includes the rotational drive sources 10; 18 for the unwinding roll 2 and the molding drum 3, the rotational drive sources 60; 61 for the carry-in side drive roll 31 and the carry-out side drive roll 32, and the rotational drive source 62 for the drive roll 50. Control.

  According to the first embodiment, the drive roll 50 of the transport roll unit 23 is provided at a position closest to the festoon unit 22, so that friction due to contact between the drive roll 50 rotated by the rotational drive source 62 and the belt member 7 is reduced. Moreover, since it is possible to suppress the tension from being applied to the belt member 7 by its own weight between the carry-out side drive roll 32 and the drive roll 50 of the festoon portion 22, the elongation of the belt member 7 can be suppressed.

In the first embodiment, since the festoon portion 22 is provided in the transport path 4, the belt member 7 is positioned on the transport roll portion 23 by the festoon portion 22 and the molding drum 3 when the belt member 7 is wound around the molding drum 3. Both ends of the belt member 7 are supported, and a traction force due to the rotational force of the molding drum 3 is applied to the other end side of the belt member 7 positioned on the conveyance roll unit 23, whereby the conveyance roll unit 23. One end side of the belt member 7 positioned above is applied with a tensile force due to the festoon portion 22, so that the conveying device 1 is provided with a condition that the belt member 7 is easily subjected to a tension along the longitudinal direction of the belt member 7. .
In such a transport apparatus 1, since the roll located closest to the festoon portion 22 in the transport roll portion 23 is the drive roll 50, the belt between the carry-out side drive roll 32 and the drive roll 50 of the festoon portion 22. The tension applied to the member 7 due to its own weight can be suppressed, and the elongation of the belt member 7 can be suppressed.
Accordingly, the variation in the elongation of the belt member 7 is reduced, and the variation in the width dimension of the belt member 7 can be reduced. Therefore, the variation in the width dimension of the belt member 7 within one tire is reduced, and a high-quality tire is manufactured. become able to.

  According to the transport apparatus 1 of the first embodiment, the roll transport path 49 formed by the driven roll 40 and the drive roll 50 of the transport roll unit 23 is inclined upward from the festoon unit 22 side toward the molding drum 3 side. Since it is the structure which inclines below toward the molding drum 3 side, ie, the structure provided with the upper inclination roll conveyance path 49a and the lower inclination roll conveyance path 49b, it followed the belt member 7 along the longitudinal direction of the belt member 7. The transport device 1 has a condition that the tension in the direction is more easily applied. In the transport device 1, the drive roll 50 is provided at a position closest to the festoon portion 22. It is possible to suppress tension from being applied to the belt member 7 by its own weight between the drive roll 50 and the belt member.

In addition, when the belt member 7 includes the metallic cord 11, the belt member 7 is easily tensioned because the magnet path 33 is provided. Even in this case, the roll main body 51 and the belt member 7 may be By reducing the friction caused by the contact, the elongation of the belt member 7 can be suppressed.
Further, the closer the cord angle α of the belt member 7 is to 0 °, the more easily the tension is applied to the belt member 7. However, even in this case, the friction caused by the contact between the roll body 51 and the belt member 7 can be reduced. Can be suppressed.

  Further, a control device 58 that controls the unwinding speed of the unwinding roll 2 and the winding speed of the molding drum 3 and a festoon that adjusts the tension applied in the longitudinal direction of the belt member 7 to be constant. Since the portion 22 is provided, the tension applied in the longitudinal direction of the belt member 7 can be made small and constant, and the elongation of the belt member 7 can be suppressed.

Example The elongation of the belt member 7 was observed in the conveying apparatus 1 that satisfied the following conditions.
(1) Belt member 7; width dimension 390 mm, transport angle β on the transport roll unit 23 (see FIG. 1) = 38 °.
(2) Molding drum 3; circumferential length of the circumference 2500 mm, winding speed 16.6 rpm, acceleration 5000 msec, deceleration 3000 msec.
(3) Drive roll 50; peripheral speed 16.6 rpm. Drive roll installation position: 1500 mm from the forming drum 3.
According to the conveyance device 1 that satisfies the above conditions, it was confirmed that the elongation of the belt member 7 could be suppressed as compared with a conveyance device that does not include the drive roll 50.

Embodiment 2
A plurality of drive rolls 50 of the transport roll unit 23 may be provided. For example, among the rolls forming the transport roll unit 23, a plurality of rolls located on the side close to the festoon unit 22 are set as the drive roll 50. In this case, the rotation speed of the drive roll located on the side closer to the festoon 22 is the same as the rotation speed of the drive roll located on the side closer to the molding drum 3 or the rotation of the drive roll located closer to the molding drum 3. By making it slower than the speed, the belt member 7 can be prevented from being loosened.

Embodiment 3
All the rolls forming the transport roll unit 23 may be the drive roll 50. In this case, the rotation speed of the drive roll located on the side closer to the festoon 22 is the same as the rotation speed of the drive roll located on the side closer to the molding drum 3 or the rotation of the drive roll located closer to the molding drum 3. By making it slower than the speed, the belt member 7 can be prevented from being loosened.

  In the present invention, the effect can be obtained even if the present invention is applied to a transport device having a horizontal transport roll unit.

  The present invention may be applied to the transport roll unit 23 in the transport apparatus having the configuration not including the festoon unit 22.

  The conveyance object by the conveyance apparatus of this invention should just be a strip | belt-shaped rubber member. For example, a carcass member, a tread member, or other belt-shaped rubber member constituting the tire may be used.

1 conveying device, 2 unwinding roll (unwinding means), 3 molding drum (winding means),
4 conveying path, 7 belt member (rubber member), 7f belt surface, 22 festoon part,
23 conveyance roll part, 49a upper inclined roll conveyance path, 49b lower inclined roll conveyance path,
50 drive rolls, 62 rotational drive sources.

Claims (1)

Unwinding means in which a belt-shaped rubber member is wound, a festoon portion provided in a conveyance path through which the rubber member unwound from the unwinding means is conveyed, and a plurality of rolls for conveying the rubber member via the festoon portion In a rubber member transport device comprising a transport roll unit having a winding means on which a rubber member sent by the transport roll unit is wound, and a control device,
A roll provided at a position closest to the festoon portion among a plurality of rolls constituting the transport roll portion is a driving roll that rotates by receiving a rotational driving force from a rotational driving source,
The control device controls the rotational drive source of the drive roll so that the peripheral speed of the drive roll is slower than the winding speed of the molding drum.

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