JP6852323B2 - Tire parts manufacturing equipment - Google Patents

Description

The present invention relates to a tire member manufacturing apparatus, and more particularly to a tire member manufacturing apparatus capable of improving the productivity of the tire member.

Patent Document 1 below proposes an apparatus for manufacturing an annular tire member made of unvulcanized rubber by using a rubber sheet and a rubber ribbon having a width smaller than that of the rubber sheet. This manufacturing apparatus has a rotatable molding drum having a cylindrical winding surface, a servicer for supplying a rubber sheet to the winding surface of the molding drum, and a rubber ribbon for supplying a rubber ribbon to the winding surface of the molding drum. Includes applicator.

Japanese Unexamined Patent Publication No. 2011-136669

The servicer and the applicator are arranged at different positions on the production line. For this reason, in the conventional manufacturing apparatus, it is necessary to move the forming drum between the servicer and the applicator. Since it takes a lot of time to move such a molded drum, there is a problem that the productivity of the tire tends to decrease. In addition, the conventional manufacturing apparatus requires a lot of space for moving the forming drum.

The present invention has been devised in view of the above circumstances, and a main object of the present invention is to provide a tire member manufacturing apparatus capable of improving tire productivity and the like.

The present invention is an apparatus for manufacturing an annular tire member made of unvulcanized rubber, which is formed on a rotatable molding drum having a cylindrical winding surface and the winding surface of the rotating molding drum. Directly or indirectly, directly or indirectly, the servicer for supplying the rubber sheet and the winding surface of the rotating molded drum are directly or indirectly supplied with a rubber ribbon having a width smaller than that of the rubber sheet. It is characterized in that the servicer and the applicator are arranged so as to be able to supply the rubber sheet and the rubber ribbon to the molding drum at the same position, respectively, including an applicator that can move in a direction. To do.

In the tire member manufacturing apparatus according to the present invention, the molding drum is arranged with the drum axis direction horizontal, and the servicer is arranged along the tangential direction in the circumferential direction of the molding drum. The applicator is preferably located above the servicer.

In the tire member manufacturing apparatus according to the present invention, it is desirable to further include a rotatable pressing roller for pressing the rubber sheet and the rubber ribbon against the winding surface side.

In the tire member manufacturing apparatus according to the present invention, the rubber sheet and the rubber ribbon further include a rotatable pressing roller for pressing the rubber sheet against the winding surface side, and the servicer and the applicator are the molded drums. The pressing roller is arranged on the first side with respect to the rotation axis, and the pressing roller is arranged on the second side opposite to the first side with respect to the rotation axis of the molding drum. Is desirable.

In the tire member manufacturing apparatus according to the present invention, it is desirable that the pressing roller includes a support shaft and a plurality of roller pieces arranged side by side in the axial direction thereof and rotatably attached to the support shaft.

In the tire member manufacturing apparatus according to the present invention, each roller piece has an inner ring supported by the support shaft, an outer ring having a pressing surface in contact with the rubber sheet and the rubber ribbon, and a circumference of the support shaft. It is desirable to include a connecting portion that elastically connects the inner ring and the outer ring, including a portion extending in a spiral shape.

In the tire member manufacturing apparatus of the present invention, the servicer and the applicator are arranged so as to be able to supply the rubber sheet and the rubber ribbon to the molding drum at the same position, respectively. As a result, the tire member manufacturing apparatus of the present invention can supply the rubber sheet and the rubber ribbon to the winding surface of the molding drum without moving the molding drum, so that the productivity of the tire can be improved. In addition, the tire member manufacturing apparatus of the present invention does not need to move the molding drum, so that the space can be reduced.

It is a perspective view which shows an example of the manufacturing apparatus of a tire member. It is a side view of FIG. It is sectional drawing which shows an example of a pressing roller. It is a side view which shows an example of a roller piece. It is a side view which shows the elastically deformed roller piece. It is a front view which partially shows the pressing roller which presses a rubber sheet and a rubber ribbon.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing an example of a tire member manufacturing apparatus (hereinafter, may be simply referred to as “manufacturing apparatus”) 1. FIG. 2 is a side view of FIG. The manufacturing apparatus 1 of the present embodiment is for manufacturing an annular tire member made of unvulcanized rubber. In the present embodiment, the tire member to be manufactured is exemplified by a belt layer and a band layer, but the tire member is not limited to such an embodiment.

The manufacturing apparatus 1 of the present embodiment includes a molding drum 2, a servicer 3, an applicator 4, and a pressing roller 5. As shown in FIG. 2, in the present embodiment, the servicer 3 and the applicator 4 are arranged on the first side S1 with respect to the rotation shaft 2r of the molding drum 2. On the other hand, the pressing roller 5 is arranged on the second side S2 opposite to the first side S1 with respect to the rotating shaft 2r of the forming drum 2.

As shown in FIGS. 1 and 2, the forming drum 2 has a cylindrical winding surface 2s. The winding surface 2s of the forming drum 2 is formed of, for example, a plurality of segments 6 supported by the rotating shaft 2r of the forming drum 2.

As shown in FIG. 1, the rotating shaft 2r of the forming drum 2 is connected to a driving device (not shown) provided in the conveying means 7. As a result, the forming drum 2 is rotatably supported via the rotating shaft 2r by the operation of the driving device. The molding drum 2 of the present embodiment is arranged so that the drum axis direction is horizontal.

The transporting means 7 is for carrying the molding drum 2 into the servicer 3 and the applicator 4 and carrying out the molding drum 2 from the servicer 3 and the applicator 4. The transport means 7 can move along, for example, a rail 8 provided on the floor.

The servicer 3 is for supplying the rubber sheet 11 to the winding surface 2s of the rotating molding drum 2. The rubber sheet 11 of the present embodiment is a belt ply 13A in which an array of belt cords is covered with topping rubber. Therefore, the rubber sheet 11 is wound around the winding surface 2s of the molding drum 2 to form a belt layer as a tire member.

As shown in FIGS. 1 and 2, the servicer 3 includes a belt conveyor portion 21 that conveys the rubber sheet 11 to the forming drum 2. The belt conveyor portion 21 of the present embodiment includes a base portion 21A and a bent portion 21B that bends downward on the downstream side of the base portion 21A, and is formed in a substantially U-shape in a side view. Similar to the conventional servicer (not shown), a rubber sheet supplying means (not shown) capable of continuously supplying the rubber sheet 11 is provided on the upstream side of the belt conveyor portion 21.

As shown in FIG. 2, one end 3t of the bent portion 21B of the servicer 3 of the present embodiment is arranged so as to be separated from the winding surface 2s of the molding drum 2. Therefore, the rubber sheet 11 (shown in FIG. 1) is arranged on the winding surface 2s of the molding drum 2 beyond 3t at one end of the servicer 3. The rubber sheet 11 arranged on the winding surface 2s is pressed against the winding surface 2s by the pressing roller 5. Therefore, the servicer 3 of the present embodiment indirectly supplies the rubber sheet 11 to the winding surface 2s via the pressing roller 5.

As shown in FIG. 2, the bent portion 21B of the servicer 3 of the present embodiment is arranged along the tangential direction D1 in the circumferential direction of the forming drum 2. As a result, the servicer 3 can smoothly supply the rubber sheet 11 to the winding surface 2s of the molding drum 2 without causing wrinkles on the wide rubber sheet 11.

As shown in FIG. 1, the applicator 4 is for supplying the rubber ribbon 12 to the winding surface 2s of the rotating molding drum 2. The rubber ribbon 12 is formed to be smaller in width than the rubber sheet 11. The rubber ribbon 12 of the present embodiment has a band cord coated with a topping rubber. Therefore, the rubber ribbon 12 is wound around the winding surface 2s of the molding drum 2 to form a band layer as a tire member. The band layer of the present embodiment is formed on the outer side in the radial direction of the belt layer.

The applicator 4 of the present embodiment includes a first applicator 23 and a second applicator 24. The first applicator 23 and the second applicator 24 include belt conveyor portions 25 and 26 that convey the rubber ribbon 12 to the molding drum 2, respectively. Similar to the conventional applicator (not shown), a rubber ribbon supplying means (not shown) capable of continuously supplying the rubber ribbon 12 is provided on the upstream side of each of the belt conveyor portions 25 and 26.

The first applicator 23 and the second applicator 24 of the present embodiment are supported by, for example, a three-dimensional moving device (not shown). As a result, the first applicator 23 and the second applicator 24 are provided so as to be movable in the drum axis direction.

As shown in FIG. 2, one end 23t on the downstream side of the first applicator 23 is arranged so as to be separated from the winding surface 2s of the molding drum 2. One end 24t on the downstream side of the second applicator 24 is arranged so as to be separated from the winding surface 2s of the molding drum 2. Therefore, the rubber ribbon 12 is arranged on the winding surface 2s of the molding drum 2 beyond one end 23t of the first applicator 23 and one end 24t of the second applicator 24. The rubber ribbon 12 arranged on the winding surface 2s is pressed against the winding surface 2s by the pressing roller 5. Therefore, the first applicator 23 and the second applicator 24 of the present embodiment indirectly supply the rubber ribbon 12 to the winding surface 2s via the pressing roller 5.

The first applicator 23 and the second applicator 24 of the present embodiment are arranged above the servicer 3. As a result, the first applicator 23 and the second applicator 24 can prevent interference with the servicer 3.

The first applicator 23 is inclined upward from one end 23t on the downstream side toward the upstream side. Similarly, the second applicator 24 is inclined upward from one end 24t on the downstream side toward the upstream side. On the downstream side, the inclination of the first applicator 23 and the second applicator 24 is set to be larger than the inclination of the servicer 3. As a result, the first applicator 23 and the second applicator 24 can supply the rubber ribbon 12 to the winding surface 2s of the rotating molding drum 2 while preventing interference with the servicer 3.

As described above, in the manufacturing apparatus 1 of the present embodiment, the servicer 3 and the applicator 4 (the first applicator 23 and the second applicator 24) are respectively for the molding drum 2 at the same position. , The rubber sheet 11 and the rubber ribbon 12 are arranged so as to be able to be supplied.

As shown in FIG. 1, the pressing roller 5 is for pressing the rubber sheet 11 and the rubber ribbon 12 against the winding surface 2s side. FIG. 3 is a cross-sectional view showing an example of the pressing roller 5. The pressing roller 5 of the present embodiment includes a support shaft 27 and a plurality of roller pieces 28, and is set to be rotatable.

The axis 27c of the support shaft 27 of the present embodiment extends in the horizontal direction. Further, the support shaft 27 is provided with a pair of roller holding means 29, 29. The pair of roller holding means 29, 29 is for preventing the positional deviation of the plurality of roller pieces 28 in the axial direction. Further, both sides of the support shaft 27 in the axial direction are movably supported by a pair of arms 32, 32.

As shown in FIG. 2, the arm 32 is configured as a cylinder mechanism including a rod 32A and a cylinder 32B that supports the rod 32A in and out of the rod 32A. By expanding and contracting the rod 32A, such an arm 32 can bring the pressing roller 5 closer to or further from the winding surface 2s of the forming drum 2.

As shown in FIG. 3, the roller pieces 28 are arranged side by side in the axial direction of the support shaft 27. A bearing 31 that can rotate around the axis of the support shaft 27 is provided between each roller piece 28 and the support shaft 27. As a result, each roller piece 28 can rotate independently of each other.

FIG. 4 is a side view showing an example of the roller piece 28. Each roller piece 28 includes an inner ring 33, an outer ring 34, and a connecting portion 35. The inner ring 33, the outer ring 34, and the connecting portion 35 are integrally formed. The outer diameter D2 (shown in FIG. 3) of the roller piece 28 is set to, for example, about 30 to 60 mm. The width W2 (shown in FIG. 3) of the roller piece 28 is set to, for example, about 2 to 8 mm. The roller piece 28 of the present embodiment is formed of, for example, a flexible resin material.

The inner ring 33 is formed in a ring shape in which a circular hole portion 33h is provided at the axis thereof. The inner diameter of the hole 33h is set to be substantially the same as the outer diameter of the bearing 31 (shown in FIG. 3). The inner ring 33 is supported by a support shaft 27 (shown in FIG. 3) via a bearing 31.

The outer ring 34 is formed in a ring shape in which a circular hole portion 34h is provided at the axis thereof. The outer ring 34 has a pressing surface 36 on the outer periphery thereof that comes into contact with the rubber sheet 11 and the rubber ribbon 12 (shown in FIG. 1).

The connecting portion 35 includes a portion that spirally extends around the support shaft 27 between the inner ring 33 and the outer ring 34. FIG. 5 is a side view showing the elastically deformed roller piece 28. As shown in FIG. 5, the connecting portion 35 can elastically connect the inner ring 33 and the outer ring 34.

FIG. 6 is a front view partially showing the pressing roller 5 for pressing the rubber sheet 11 and the rubber ribbon 12. The pressing roller 5 can independently generate a reaction force while making each roller piece 28 follow the unevenness formed on the rubber sheet 11 and the rubber ribbon 12. Therefore, the pressing roller 5 can effectively press the rubber sheet 11 and the rubber ribbon 12 against the winding surface 2s side.

Next, a method of manufacturing a tire member using the manufacturing apparatus 1 of the present embodiment (hereinafter, may be simply referred to as a “manufacturing method”) will be described.

In the manufacturing method of the present embodiment, first, as shown in FIGS. 1 and 2, the conveying means 7 to which the forming drum 2 is attached is arranged between the servicer 3 and the applicator 4 and the pressing roller 5. (Step P1). Next, the forming drum 2 is rotated by a driving device (not shown) provided in the conveying means 7 (step P2).

Next, in the manufacturing method of the present embodiment, the pressing roller 5 is brought into contact with the winding surface 2s of the molding drum 2. As a result, the pressing roller 5 can be freely rolled on the winding surface 2s of the rotating molding drum 2.

Next, in the manufacturing method of the present embodiment, the rubber sheet 11 supplied from the rubber sheet supply means (not shown) is supplied to the winding surface 2s of the molding drum 2 via the servicer 3 (step P3). The rubber sheet 11 is arranged on the winding surface 2s of the rotating molding drum 2 beyond one end 3t (shown in FIG. 2) of the servicer 3.

As described above, the servicer 3 is arranged on the first side S1 with respect to the rotation shaft 2r of the forming drum 2. Therefore, the servicer 3 can supply the rubber sheet 11 to the winding surface 2s without interfering with the pressing roller 5 arranged on the second side S2. Therefore, in the manufacturing apparatus 1 of the present embodiment, for example, it is not necessary to move the servicer 3 in order to avoid interference with the pressing roller 5, so that time loss due to moving the servicer 3 or the pressing roller 5 can be prevented. Can be done.

The rubber sheet 11 is wound around the winding surface 2s while being guided between the rotating winding surface 2s and the pressing roller 5 that rolls the winding surface 2s. The pressing roller 5 of the present embodiment is composed of a plurality of roller pieces 28 that can independently generate a reaction force with respect to the rubber sheet 11. As a result, the rubber sheet 11 is effectively pressed against the winding surface 2s side while receiving an appropriate reaction force from the pressing roller 5. By winding the rubber sheet 11 in this way, a cylindrical belt layer is formed on the winding surface 2s.

Next, in the manufacturing method of the present embodiment, the rubber ribbon 12 supplied from the rubber ribbon supply means (not shown) is wound on the winding surface of the molding drum 2 via the first applicator 23 and the second applicator 24. Arrange in 2s (step P4). The rubber ribbon 12 is arranged on the winding surface 2s of the molding drum 2 beyond one end 23t (shown in FIG. 2) of the first applicator 23 and 24t (shown in FIG. 2) one end of the second applicator 24. To. The rubber ribbon 12 of the present embodiment is arranged on the outer side in the radial direction of the rubber sheet 11 wound around the winding surface 2s of the molding drum 2.

As described above, the applicator 4 (in this embodiment, the first applicator 23 and the second applicator 24) is arranged on the first side S1 with respect to the rotation shaft 2r of the molding drum 2. There is. As a result, the first applicator 23 and the second applicator 24 can supply the rubber ribbon 12 to the winding surface 2s without interfering with the pressing roller 5 arranged on the second side S2. Therefore, the manufacturing apparatus 1 of the present embodiment can prevent time loss due to the movement of the first applicator 23, the second applicator 24, or the pressing roller 5.

Further, the servicer 3 and the applicator 4 (the first applicator 23 and the second applicator 24) can supply the rubber sheet 11 and the rubber ribbon 12 to the molding drum 2 at the same position, respectively. Have been placed. Therefore, in the manufacturing apparatus 1 of the present embodiment, the rubber sheet 11 and the rubber ribbon 12 are placed on the winding surface 2s of the molding drum 2 without moving the molding drum 2 between the servicer 3 and the applicator 4. Can be supplied sequentially. Therefore, the manufacturing apparatus 1 of the present embodiment can improve the productivity of the tire and reduce the space occupied by the manufacturing apparatus 1.

In the conventional manufacturing apparatus, the forming drum 2 interferes with the servicer or the applicator. Therefore, in the conventional manufacturing apparatus, it is necessary to separate the servicer or the applicator from the molding drum 2 in order to avoid interference with the molding drum 2.

In the manufacturing apparatus 1 of the present embodiment, since it is not necessary to move the molding drum 2 between the servicer 3 and the applicator 4, the molding drum 2 and the servicer 3 or the applicator 4 do not interfere with each other. As a result, the manufacturing apparatus 1 of the present embodiment does not need to separate the servicer 3 or the applicator 4 from the molding drum 2, so that the productivity of the tire can be improved.

As shown in FIG. 6, the rubber ribbon 12 is wound around the winding surface 2s while being guided between the winding surface 2s (in the present embodiment, the outer surface of the rubber sheet 11) and the pressing roller 5. .. The pressing roller 5 of the present embodiment is composed of a plurality of roller pieces 28 that can be elastically deformed independently. As a result, the pressing roller 5 can independently generate a reaction force while making each roller piece 28 follow the unevenness formed on the rubber sheet 11 and the rubber ribbon 12. Therefore, the manufacturing apparatus 1 can effectively press the rubber ribbon 12 against the winding surface 2s side while effectively discharging the air between the laminated rubber ribbons 12 and 12. By winding the rubber ribbon 12 in this way, a cylindrical band layer is formed.

Since the pressing roller 5 of the present embodiment can press both the rubber sheet 11 and the rubber ribbon 12, it is necessary to provide a pressing roller (not shown) for each servicer and applicator as in the conventional manufacturing apparatus. Absent. Therefore, the space occupied by the manufacturing apparatus 1 can be reduced.

Next, in the manufacturing method of the present embodiment, after the supply of the rubber ribbon 12 is completed, the pressing roller 5 is separated from the molding drum 2 (step P5). Then, the transporting means 7 transports the molding drum 2 on which the belt layer and the band layer are formed to a manufacturing apparatus (not shown) in the downstream process (process P6). As a result, a series of processes of the manufacturing method of the present embodiment is completed.

In the servicer 3 of the present embodiment, the rubber sheet 11 is indirectly supplied to the winding surface 2s of the rotating molding drum 2 via the pressing roller 5, but the present invention is not limited to such an embodiment. For example, the servicer 3 may be one in which the rubber sheet 11 is directly supplied (wound) to the winding surface 2s without using the pressing roller 5.

The applicator 4 of the present embodiment (in the present embodiment, the first applicator 23 and the second applicator 24) is attached to the winding surface 2s of the rotating molding drum 2 via the pressing roller 5 and the rubber ribbon 12 Was indirectly supplied, but is not limited to such an embodiment. For example, the applicator 4 may be one in which the rubber ribbon 12 is directly supplied (wound) to the winding surface 2s without using the pressing roller 5.

Although the particularly preferable embodiments of the present invention have been described in detail above, the present invention is not limited to the illustrated embodiments and can be modified into various embodiments.

A tire member manufacturing apparatus having a servicer and an applicator having the basic structure shown in FIGS. 1 and 2 and having a servicer and an applicator arranged so as to be able to supply a rubber sheet and a rubber ribbon to a molding drum at the same position was created. (Example). In the manufacturing apparatus of the embodiment, the applicator is arranged above the servicer. The servicer and applicator are arranged on the first side with respect to the rotation axis of the molding drum. On the other hand, the pressing roller is arranged on the second side with respect to the rotation axis of the forming drum.

For comparison, a conventional manufacturing apparatus for tire members in which a servicer and an applicator are arranged at different positions on a manufacturing line was created (comparative example). In the manufacturing apparatus of the comparative example, after the rubber sheet was supplied to the molding drum, the molding drum was moved between the servicer and the applicator, and the rubber ribbon was supplied to the molding drum. Then, the time required to manufacture the tire was measured in the manufacturing apparatus of the example and the manufacturing apparatus of the comparative example.

As a result of the test, the production time of the example was 95% of the production time of the comparative example. This is because the manufacturing apparatus of the embodiment did not need to move the molding drum between the servicer and the applicator when supplying the rubber sheet and the rubber ribbon to the molding drum. Therefore, the manufacturing apparatus of the example was able to improve the productivity of the tire as compared with the manufacturing apparatus of the comparative example.

2 Molded drum 3 Servicer 4 Applicator 11 Rubber sheet 12 Rubber ribbon

Claims (6)

A device for manufacturing an annular tire member made of unvulcanized rubber.
With a rotatable molded drum with a cylindrical winding surface,
A servicer for supplying a rubber sheet directly or indirectly to the winding surface of the rotating molding drum, and
The winding surface of the rotating molded drum includes, directly or indirectly, an applicator that can move in the drum axial direction while supplying a rubber ribbon having a width smaller than that of the rubber sheet.
The molded drum is arranged so that the drum axis direction is horizontal.
The servicer and the applicator are arranged so that the rubber sheet and the rubber ribbon can be supplied to the molding drum at the same position, respectively .
The applicator is a tire member manufacturing apparatus, characterized in that the applicator is arranged above the servicer.
The servicer, the forming drum apparatus for manufacturing a circumferential direction of claim 1, wherein the tire member disposed along the tangential. The tire member manufacturing apparatus according to claim 1 or 2, further comprising a rotatable pressing roller for pressing the rubber sheet and the rubber ribbon against the winding surface side. A rotatable pressing roller for pressing the rubber sheet and the rubber ribbon against the winding surface side is further included.
The servicer and the applicator are arranged on the first side with respect to the rotation axis of the molding drum.
The tire member manufacturing apparatus according to claim 2, wherein the pressing roller is arranged on a second side opposite to the first side with respect to the rotation axis of the molding drum. The device for manufacturing a tire member according to claim 3 or 4, wherein the pressing roller includes a support shaft and a plurality of roller pieces arranged side by side in the axial direction and rotatably attached to the support shaft. Each roller piece includes an inner ring supported by the support shaft, an outer ring having a pressing surface in contact with the rubber sheet and the rubber ribbon, and a portion spirally extending around the support shaft. The device for manufacturing a tire member according to claim 5, further comprising a connecting portion that elastically connects the outer ring.

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