JP2012035605A - Method of manufacturing pneumatic tire and carrier for cylindrical body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing a pneumatic tire allowing sufficient, smooth and sure air bleeding between the other tire constituting members molded on a molding drum and a cylindrical body stuck on their peripheral surfaces and a carrier.SOLUTION: In carrying the cylindrical body 30 to around the molding drum 40, the outer peripheral side of the cylindrical body 30 with many through-holes 30a formed at predetermined spacings is surrounded by the carrier 1, and a plurality of points on the outer peripheral surface of the cylindrical body 30 are sucked under negative pressure by respective sucking means 5 such that the cylindrical body 30 is carried in a state that it is sucked and held within the carrier 1 and the cylindrical body 30 is stuck on peripheral surfaces of the other tire constituting members 31, 32 on the molding drum 40. Then, air bleeding between the cylindrical body 30 and the other tire constituting members 31, 32 is performed through the plurality of through-holes 30a formed in the cylindrical body 30 by continuously performing negative pressure suction by the sucking means 5 while keeping the sucked and held state of the cylindrical body 30 by the carrier 1.

Description

  In the production of a pneumatic tire, the present invention provides a butt joint between both end faces of a sheet-like tire constituting member, that is, a cylindrical body formed by a so-called butt joint on a drum separate from a molding drum for molding a green case The cylindrical body is sucked and conveyed around the molding drum, and the pneumatic tire manufacturing method and the cylindrical body conveying device, in particular, without application of the stitcher roller, between the members The technique which can perform air bleeding is proposed.

A manufacturing method of this type of pneumatic tire is proposed in Japanese Patent Application No. 2010-117388, which is an earlier application by the applicant.
In particular, the proposed technique performs end face joining of carcass ply materials as tire constituent members with a dedicated end face joining drum, and conveys the formed cylindrical body to the forming drum by a conveying means. For example, by attaching the end surface bonding of the carcass ply material and the conveyance of the cylindrical body formed by the end surface bonding in order, a plurality of cylindrical bodies are bonded to each other. The green case is easily and efficiently molded on a molding drum.

By the way, in the above manufacturing method, after the cylindrical body formed by the end surface joining drum is transported around the molding drum, the cylindrical body is formed on another tire constituent member formed on the molding drum, for example, an inner liner material. In adhering to the peripheral surface of the material and the chafer material, by performing a stitcher roller on the outer peripheral surface of the cylindrical body, etc., air is released between the cylindrical body and other tire constituent members on the inner peripheral side, It is inevitable that the two members are sufficiently pressed together.
In this case, in order to perform air bleeding between the conveyed cylindrical body and other tire constituent members on the molding drum, it is necessary to install a stitching roller device, which increases the equipment cost. There is a problem that the tire manufacturing time cannot be shortened due to the approach and separation of the molding drum.

  The present invention has a problem of solving such problems of the prior art, and an object of the present invention is to provide a tire constituent member formed by butt-joining end faces on an end face joining drum. When the cylindrical body is transported around the molding drum and the green case is molded on the molding drum, other tire components formed on the molding drum and its peripheral surface are not required when the stitcher roller is required. It is an object of the present invention to provide a pneumatic tire manufacturing method and a conveying device capable of sufficiently smoothly and surely performing air bleeding between a cylindrical body stuck on top.

The pneumatic tire manufacturing method according to the present invention is such that a tire-shaped member is formed into a cylindrical body by abutting and joining both end surfaces of a sheet-like tire component member wound around the peripheral surface of the drum on an end surface bonding drum. After forming, the tire is sucked and held by a transport device having a plurality of suction means, transported around the molding drum, and other tire configurations such as an inner liner material molded on the molding drum When sticking to the peripheral surface of the member and molding the green case,
When the cylindrical body is transported around the molding drum, the outer peripheral side of the cylindrical body having a large number of through holes having a small diameter of, for example, 1 mm or less is transported at predetermined intervals in the circumferential direction and the axial direction. Surrounding by the device, each of the suction means, by negative pressure suction at a plurality of locations on the outer peripheral surface of the cylindrical body, transported in a state where the cylindrical body is sucked and held inside the transport device,
By sticking the cylindrical body onto the peripheral surface of another tire component on the molding drum, and then continuing the negative pressure suction of the suction means while maintaining the suction holding state of the cylindrical body by the transport device The air venting is performed between the cylindrical body and other tire constituent members through a plurality of through holes formed in the cylindrical body.

  Preferably, after the cylindrical body is transported around the molding drum, the cylindrical body and the other tire constituent members are sandwiched between the suction means and the molding drum of the transport device and pressed, while the cylindrical body is pressed. The air is removed between the cylindrical body and the other tire constituent members through the through-holes provided in.

  Further, the cylindrical body conveying device according to the present invention includes a plurality of segments that are arranged at predetermined intervals in the circumferential direction and can be displaced in expansion and contraction, and a plurality of suction means attached to each of the segments. Each of the suction means holds and holds the cylindrical body of the tire component member from the outer peripheral surface side, and transports the cylindrical body to a required position. This is a negative pressure suction mechanism for adsorbing and holding the cylindrical body with a negative pressure atmosphere between the outer peripheral surface and the negative pressure suction pad in contact with the surface.

  According to the method for manufacturing a pneumatic tire of the present invention, the cylindrical body is transported around the molding drum in a state where the cylindrical body is sucked and held inside the transport device, and another tire configuration on the molding drum is provided. After being stuck on the peripheral surface of the member, the negative pressure suction of each suction means is continued while maintaining the suction holding state of the cylindrical body by the conveying device, and through the plurality of through holes formed in the cylindrical body. The suction means for sucking and holding the cylindrical body during conveyance is used to release air between the cylindrical body and the other tire constituent members by performing air bleeding between the cylindrical body and the other tire constituent members. Since the air sealed between the cylindrical body and the other tire components is sucked sufficiently smoothly and reliably from the plurality of through holes of the cylindrical body, the stitcher roller should be applied. As a result, the With an increase in manufacturing cost can be prevented due to the installation of Ngurora device, actuation of the device also becomes unnecessary, it is possible to improve the production efficiency of the tire.

  Here, when the air is released between the cylindrical body and the other tire constituent members by the negative pressure suction of the suction means, for example, the diameter of the segment of the conveying device located on the outer peripheral side is reduced, or the inner peripheral side When the cylindrical drum and other tire constituent members are sandwiched and pressed between the suction means of the transport device and the molding drum by expanding and deforming the molding drum located in the position between the members, Since the air bleeding is further promoted, the sticking force between the cylindrical body and the other tire constituent member can be effectively improved.

  According to the conveying device of the present invention, as described above, the cylindrical body is conveyed from the end surface joining drum to the molding drum, the cylindrical body provided with a large number of through holes, and the other molded on the molding drum. As described above, air can be removed from the tire components only by the conveying device, so that the stitching roller device is not required, the equipment cost can be reduced, and the tire manufacturing time can be shortened. Can be planned.

It is a longitudinal cross-sectional view which shows one Embodiment of the conveying apparatus of this invention by the arrangement | positioning attitude | position on a rail mechanism. It is a fragmentary longitudinal cross-section which shows the butt | joining joining process of the both end surfaces of a sheet-like tire structural member in the tire manufacturing method using the conveying apparatus of FIG. It is a longitudinal cross-sectional view which shows the conveyance process of a cylindrical body following the process of FIG. It is a longitudinal cross-sectional view which shows the sticking process to the other tire structural member on a molding drum of the cylindrical body following the process of FIG. It is a longitudinal cross-sectional view which expands a principal part and shows the sticking process to the other tire structural member on a molding drum of a cylindrical body. It is a front view which illustrates the piercing apparatus which can be used for the tire manufacturing method of this invention.

Embodiments of the present invention will be described below with reference to the drawings.
The apparatus 1 illustrated in FIG. 1 includes an annular frame 2 having legs extending toward the rail mechanism 10, a plurality of cylinders 3 disposed in the circumferential direction of the annular frame 2, here six cylinders, and a cylinder 3, connected to each of the three segments 4, which are displaced in the diameter of the inside and outside of the annular plate 2 based on the operation of the cylinder 3, and are attached to the inner peripheral surface of each segment 4. And a plurality of negative pressure suction pads 5 forming a part of a negative pressure suction mechanism to be sucked onto the outer peripheral surface of a cylindrical body (not shown).

Here, a slide bearing 6 that fits on the rail 11 of the rail mechanism 10 to cause sliding displacement on the rail 11 and a rack 12 provided between the pair of rails 11 are provided on the legs of the annular frame 2. And the pinion 7 to which a rotational driving force is applied from a motor (not shown) is provided, whereby the device 1 can be moved on the rail mechanism 10.
Although not shown in the drawings instead of such a rack and pinion mechanism, the transport device can be moved on the rail mechanism by various drive mechanisms such as a motor-driven chain and a timing belt.

  According to such a conveying apparatus 1, a cylinder as shown in FIG. 3 is formed by butt-joining both end faces of the sheet-like tire constituent member under the reduced diameter displacement of each segment 4 based on the operation of the cylinder 3. By suctioning the outer peripheral surface of the body with a plurality of negative pressure suction pads 5, the cylindrical body is sucked and held inside each segment 4 arranged in the circumferential direction, for example, the expansion of each segment 2 is performed. The cylindrical body can be transported by moving the device 1 on the rail mechanism 10 under a radial displacement.

By the way, in order to manufacture a pneumatic tire using the conveying device 1, first, as shown in FIG. 2, the tire structure is formed on the end surface joining drum 20 disposed on one end side of the rail mechanism 10. A sheet-like carcass ply material as a member is wound and the both ends of the carcass ply material are butt-joined on the drum 20 to form a cylindrical body 30 having a width of 500 mm and a circumferential length of 1000 mm, for example.
Here, as schematically shown in FIG. 2, the cylindrical body 30 has a large number of through-holes 30a at a predetermined interval in the circumferential direction and the axial direction, for example, one in a region of 5 cm × 5 cm. Is previously provided by, for example, needle insertion as will be described later. In addition, these through-holes 30a can have a small diameter of about 1 mm or less.

Next, the transport device 1 is moved toward the end surface joining drum 20 on the rail mechanism 10, and as shown in FIG. 3, around the cylindrical body 30 formed on the end surface joining drum 20, the transport device 1. In the reduced diameter displacement posture of the segment 4 based on the action of the cylinder 3, the segment 4 is expanded in diameter while the outer peripheral surface of the cylindrical body 30 is sucked with a negative pressure suction pad 5 having a diameter of about 30 mm, for example. Then, the cylindrical body 30 is peeled off from the drum 20 and held by suction with the transport device 1.
In this case, since a large number of through-holes 30a are formed in the cylindrical body 30, the negative pressure suction pad 5 may suck air through the through-holes 30a. By performing a larger amount of negative pressure suction by the negative pressure suction pad 5 than by suction of air from 30a, the cylindrical body 30 can be reliably sucked and held inside the transport device 1.

Thereafter, with the cylindrical body 30 held by the transport apparatus 1, the transport apparatus 1 is disposed on the other end side of the rail mechanism 10 as shown in FIG. 4 based on the operation of the rack and pinion mechanism. The cylindrical body 30 is adhered to the peripheral surfaces of the inner liner material 31 and the chafer material 32 formed in advance on the molding drum 40 by being moved toward the molding drum 40.
This sticking is performed in a state in which the peripheral surface of the inner liner material 31 and the like on the molding drum 40 is surrounded by the cylindrical body 30 that is sucked and held by the transport device 1, for example, the molding drum 40 and the inner liner material 31 and the like. This can be performed by expanding the diameter and bringing the inner peripheral surface of the cylindrical body 30 into contact with the peripheral surface of the inner liner material 31 and the like.
At this time, as shown in an enlarged view in FIG. 5, the negative pressure suction of the pad 5 is continued while maintaining the suction holding state of the cylindrical body 30 by the conveying device 1, and the through hole 30 a provided in the cylindrical body 30. The air is removed between the cylindrical body 30 and the inner liner material 31 and the chafer material 32 via the.

  According to this, air between the cylindrical body 30 and the inner liner material 31 and the like is smoothly sucked from the through-hole 30a of the cylindrical body 30 by the action of the pad 5 of the apparatus 1, and thus the cylindrical body 30 and In addition, the inner liner material 31 and the chafer material 32 can be securely crimped in a short time. As a result, the stitching roller device for crimping the cylindrical body 30 and the inner liner material 31 and the like together. Is not required, so that the equipment cost and thus the manufacturing cost can be reduced, and the reduction of the production efficiency due to the operation of the stitching roller device can be prevented.

  Here, from the viewpoint of sufficiently releasing the air between the cylindrical body 30 and the inner liner material 31 and the like so as to ensure that they are pressure-bonded to each other, preferably, to the molding drum 40 of the conveying device 1. The cylindrical body 30 is reduced in diameter by the reduced diameter displacement of the segment 4 of the conveying device 1 in the surrounding posture, or the molding drum 40 is expanded in diameter together with the inner liner material 31 and the chafer material 32, or is cylindrical. By deforming both the body 30 and the inner liner material 31, etc., the cylindrical body 30, the inner liner material 31 and the chafer material 32 are respectively transferred to the negative pressure suction pad 5 and the molding drum 40 of the transport device 1. And press between them.

  By the way, upon such pressing, the molding drum 40 is expanded and deformed together with the inner liner material 31 and the chafer material 32 as indicated by arrows in FIG. When each is pressed, the inner liner material 31 and the like can be more uniformly deformed over the entire circumference than in the case where the segment 4 is reduced in diameter, so that the cylindrical body 30 is locally reduced in diameter. The nonuniformity in the circumferential direction due to this can be effectively removed, and the residual amount of air between the cylindrical body 30, the inner liner material 31 and the chafer material 32 can be effectively reduced.

  Although not shown in the drawings, when molding a green case having a two-layered cylindrical body on a molding drum, the air vent between the carcass ply material and the chafer material and the inner circumferential side cylindrical body, It is preferable that each of the air bleeding between the circumferential side cylindrical body and the circumferential side cylindrical body is performed by a negative pressure suction pad of the transport device.

  By the way, in order to form a large number of through-holes 30a in the cylindrical body 30 in advance, for example, the cylindrical body 30 is formed by abutting and joining both end surfaces of the sheet-like tire constituent member on the end surface joining drum 20. Prior to this, between the pair of rollers 51 and 52 of the piercing device 50 illustrated in FIG. 6, the sheet-like tire constituent member fed toward the end surface joining drum 20 is provided in the middle of the feeding. Can be perforated.

  On the surface of the roller 51 on the upper side in the figure of the piercing device 50, a large number of cone-shaped needles 51a are provided at predetermined intervals in the circumferential direction and the axial direction. The surface of the roller 52 is provided with a number of holes 52a for receiving the respective conical needles 51a at positions corresponding to the needles 51a of the rollers 51.

  According to the piercing device 50, even if the fed sheet-like tire constituent member is, for example, a carcass ply material in which a large number of cords are extended, the rollers 51 and 52 are rotated. Each time the conical needle 51a formed on the surface of the roller 51 is inserted into the hole 52a of the roller 52, the conical needle 51a is inserted into the fed carcass ply material while avoiding the cord. Thus, a plurality of through holes can be formed in the carcass ply material.

DESCRIPTION OF SYMBOLS 1 Conveyor device 2 Annular plate 3 Cylinder 4 Segment 5 Negative pressure adsorption pad 6 Slide bearing 7 Pinion 10 Rail mechanism 11 Rail 12 Rack 20 End surface joining drum 30 Cylindrical body 30a Through-hole 31 Inner liner material 32 Chafer material 40 Molding drum 50 Piercing Equipment 51, 52 Roller 51a Needle 52a Hole

Claims (3)

On the end surface joining drum, both end surfaces of the sheet-like tire constituent member wound around the peripheral surface of the drum are butted and joined to form the tire constituent member into a cylindrical body, and then a plurality of adsorbing means are provided. The cylindrical body is sucked and held by a transporting device, transported around a molding drum, and attached to the peripheral surface of another tire component molded on the molding drum, thereby forming a green case. A tire manufacturing method comprising:
When transporting the cylindrical body around the molding drum, the outer peripheral side of the cylindrical body provided with a number of through holes at a predetermined interval is surrounded by a transport device, and the suction means By sucking a plurality of locations on the outer peripheral surface under negative pressure, the cylindrical body is sucked and held inside the transport device,
By sticking the cylindrical body onto the peripheral surface of another tire component on the molding drum, and then continuing the negative pressure suction of the suction means while maintaining the suction holding state of the cylindrical body by the transport device The manufacturing method of the pneumatic tire which performs air bleeding between a cylindrical body and another tire structural member through the several through-hole formed in the cylindrical body.   After the cylindrical body is transported around the molding drum, the cylindrical body and the other tire constituent members are sandwiched between the suction means of the transporting device and the molding drum and pressed, and through holes provided in the cylindrical body The manufacturing method of the pneumatic tire of Claim 1 which performs air bleeding between a cylindrical body and another tire structural member via. A plurality of segments that are arranged at predetermined intervals in the circumferential direction and that can be displaced in expansion and contraction, and a plurality of suction means that are attached to each of the segments. A conveying device that sucks and holds the cylindrical body of the constituent member from the outer peripheral surface side and conveys the cylindrical body to a required position,
Conveying the cylindrical body serving as a negative pressure suction mechanism for adsorbing and holding the cylindrical body with a negative pressure atmosphere between the suction means and the outer peripheral surface in a contact posture of the negative pressure suction pad to the outer peripheral surface of the cylindrical body apparatus.

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