JP2008194906A - Stitcher and contact bonding method of tire constructing member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To keep the quality of a green tire while shortening the molding time of the green tire. <P>SOLUTION: A stitcher is provided, which has the supporting frame 3 provided in the vicinity of the molding drum D, has the movable bases 7 provided on the supporting frame 3 movably to the transverse direction that is parallel with the drum axial center Dc of the molding drum D, has the servomotor 9, which is employed for moving the movable bases 7 to the transverse direction, provided on the supporting frame 3, has the air cylinders 17 provided on the movable bases 7 and has ball bearings 21 provided on the piston rods 19 of the air cylinders 17, and in which the ball bearings 21 have the balls 25 that are rotatable in an arbitrary direction and that can press the unvulcanized tire constructing members T. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a stitcher used for crimping a plurality of unvulcanized tire components laminated and pasted on the outer peripheral surface of a molding drum, and a plurality of non-stacked and pasted on the outer peripheral surface of a molding drum. The present invention relates to a method for crimping a tire constituent member for crimping a vulcanized tire constituent member.

  The green tire molding process includes a crimping process that crimps multiple unvulcanized tire components such as inner liners, carcass plies, belts, and treads laminated and pasted on the outer peripheral surface of the molding drum. The crimping process is performed as follows.

  That is, as shown in FIG. 5, the pair of disc-shaped rolls 103 in the stitcher 101 are moved in a direction approaching the outer peripheral surface of the molding drum D, and the pair of rolls 103 rotatable around the roll axis 103c. A plurality of unvulcanized tire constituent members T are pressed. Then, the pair of rolls 103 is formed by rotating the molding drum D around the drum axis Dc while the plurality of unvulcanized tire constituent members T are pressed by the pair of disc-shaped rolls 103. It is moved so as to be separated in the lateral direction parallel to the drum axis Dc of D. Thereby, the some unvulcanized tire structural member T can be crimped | bonded over the perimeter.

In addition, there exists a thing shown to patent document 1-patent document 3 as a prior art relevant to this invention.
JP-A-9-117969 JP 2006-88537 A Japanese Unexamined Patent Publication No. 7-117151

  By the way, in the normal operation state of the stitcher 101, the drum axis Dc of the molding drum D and the roll axis 103c of the roll 103 are parallel, and when the roll 103 is moved in the lateral direction, a plurality of unvulcanized tires are obtained. When the component member T is crimped, the roll 103 (in other words, a member that presses the unvulcanized tire component member T) slides on the unvulcanized tire component member T. Therefore, in response to a request for shortening the molding time of the green tire, if the lateral movement speed of the roll 103 is increased, a part of the unvulcanized tire constituent member T is turned up, as shown in FIG. As described above, wrinkles Tw are generated in the unvulcanized tire constituent member T, and the quality (moldability) of the green tire is deteriorated. That is, there is a problem that it is extremely difficult to maintain the quality of the green tire by suppressing the generation of wrinkles Tw in the unvulcanized tire constituent member T while shortening the molding time of the green tire. .

  In addition, not only when crimping a plurality of unvulcanized tire constituent members laminated and pasted on the outer peripheral surface of the molding drum, but also a joint portion of the unvulcanized tire constituent members pasted on the outer peripheral surface of the molding drum The above-mentioned problem also arises when pressure bonding is performed.

  Then, an object of this invention is to provide the crimping method of the tire structure member of a novel structure and a novel structure which can solve the above-mentioned problem.

  A first feature of the present invention (a feature of the invention described in claim 1) is that a plurality of unvulcanized tire constituent members laminated and pasted on the outer peripheral surface of the molding drum are crimped, or the molding drum In a stitcher used for crimping a joint portion of an unvulcanized tire constituent member affixed to an outer peripheral surface of the support frame, a support frame provided in the vicinity of the molding drum, and a support frame provided on the support frame. A movable table provided to be movable in a lateral direction parallel to the drum axis, movable table moving means for moving the movable table in the horizontal direction, and an outer peripheral surface of the molding drum provided in the movable table An actuator provided with a movable rod that can move in a direction approaching and moving away from the actuator, and the movable rod of the actuator is provided (including connected) and can be rotated in any direction. One and ball bearings unvulcanized the tire structure member with a depressible ball and summarized in that provided with the.

  According to the first feature, the movable rod is moved in a direction approaching the outer peripheral surface of the molding drum by driving the actuator, and the ball bearing is moved in the approaching direction integrally with the movable rod. By doing so, a plurality of unvulcanized tire constituent members are pressed by the balls that are freely rotatable in any direction. The movable base is driven by the movable base moving means while rotating the molding drum around the drum axis while pressing a plurality of unvulcanized tire constituent members with the balls. The ball bearing is moved in the lateral direction, and the ball bearing is moved in the lateral direction integrally with the movable base. Thereby, a plurality of unvulcanized tire constituent members can be crimped over the entire circumference.

  Here, since the ball bearing is moved in the lateral direction under a state in which the plurality of unvulcanized tire components are pressed by the balls that are rotatable in an arbitrary direction, a plurality of unvulcanized tires are moved. When the tire constituent member is pressure-bonded, the ball (in other words, a member that presses the unvulcanized tire constituent member) does not skid on the unvulcanized tire constituent member.

  Further, by moving the movable rod in the direction approaching the outer peripheral surface of the molding drum by driving the actuator, the ball bearing is moved in the approaching direction integrally with the movable rod, so that an arbitrary The joint portion of the tire constituent member is pressed by the ball that is freely rotatable in the direction. Then, under the state where a plurality of unvulcanized tire components are pressed by the balls, the movable table is moved in the lateral direction by driving the movable table moving means, and the ball bearing is moved to the movable table. And move in the lateral direction integrally. Thereby, the joint part of the said unvulcanized said tire structural member can be crimped | bonded.

  Here, in order to move the ball bearing in the lateral direction under a state where the joint portion of the unvulcanized tire component member is pressed by the ball freely rotatable in an arbitrary direction, the unvulcanized tire configuration When the joint portion of the member is pressure-bonded, the ball (in other words, a member that presses the unvulcanized tire constituent member) does not skid on the unvulcanized tire constituent member.

  A second feature of the present invention (feature of the invention described in claim 2) is a method for crimping a tire component member, wherein a plurality of unvulcanized tire component members laminated and pasted on the outer peripheral surface of a molding drum are crimped. The ball bearing is rotated while rotating the molding drum around the drum axis while pressing a plurality of unvulcanized tire constituent members with balls freely rotatable in any direction in the ball bearing. The gist is that a plurality of unvulcanized tire constituent members are pressure-bonded over the entire circumference by moving in a lateral direction parallel to the drum axis of the molding drum.

  According to the second feature, in order to move the ball bearing in the lateral direction under a state in which a plurality of unvulcanized tire components are pressed by the balls that are rotatable in an arbitrary direction, When the tire constituent member of sulfur is pressure-bonded, the ball (in other words, a member that presses the unvulcanized tire constituent member) does not skid on the unvulcanized tire constituent member.

  A third feature of the present invention (a feature of the invention described in claim 3) is a method for crimping a tire component member, in which a joint portion of an unvulcanized tire component member attached to the outer peripheral surface of a molding drum is crimped. The ball bearing is moved in a lateral direction parallel to the drum axis of the molding drum under a state in which the joint portion of the unvulcanized tire component member is pressed by a ball that is rotatable in any direction in the ball bearing. The gist is to crimp the joint portion of the unvulcanized tire constituent member by moving it.

  According to a third feature, the ball bearing is moved in the lateral direction under a state in which the joint portion of the unvulcanized tire component member is pressed by the ball that is rotatable in an arbitrary direction. When the joint portion of the tire constituent member is pressure-bonded, the ball (in other words, a member that presses the unvulcanized tire constituent member) does not skid on the unvulcanized tire constituent member.

  According to the invention according to any one of claims 1 to 3, when a plurality of unvulcanized tire constituent members are pressure-bonded and / or joints of the unvulcanized tire constituent members. When the part is pressure-bonded, the ball does not skid on the unvulcanized tire component, so even if the lateral movement speed of the ball bearing is increased, the unvulcanized tire component is wrinkled. Generation | occurrence | production can fully be suppressed. Therefore, the quality of the green tire can be maintained while shortening the molding time of the green tire.

  An embodiment of the present invention will be described with reference to FIGS.

  Here, FIG. 1 is a plan view of a stitcher according to an embodiment of the present invention, FIG. 2 is a view taken along line II-II in FIG. 1, and FIG. 3 is a first tire according to an embodiment of the present invention. FIG. 4 is a diagram for explaining a method for crimping a component member, and FIG. 4 is a diagram for explaining a method for crimping a second tire component member according to an embodiment of the present invention. In the drawings, “FF” indicates the forward direction, “FR” indicates the backward direction, “L” indicates the left direction, and “R” indicates the right direction.

  As shown in FIG. 1, a stitcher 1 according to an embodiment of the present invention includes a plurality of unvulcanized tire configurations such as an inner liner, a carcass ply, a belt, and a tread that are laminated and adhered to the outer peripheral surface of a molding drum D. The member T is crimped, or the joint portion Tj ′ (see FIG. 4) of an unvulcanized tire constituent member T ′ (see FIG. 4) such as an inner liner attached to the outer peripheral surface of the molding drum D is crimped. It is used to do. And the concrete structure of the stitcher 1 is as follows. The molding drum D can be expanded / contracted (expanded / contracted) and rotated around the drum axis Dc by driving a drum motor (not shown).

  That is, as shown in FIGS. 1 and 2, a support frame 3 is provided in the vicinity of the molding drum D, and the support frame 3 has a lateral direction (left-right direction) parallel to the drum axis Dc. ) Is provided with a pair of guide rails 5. Further, the pair of guide rails 5 are provided with a pair of movable bases 7 so as to be movable in the lateral direction. In other words, the pair of movable bases 7 are provided on the support frame 3 via the pair of guide rails 5. It can be moved in the horizontal direction.

  A servo motor 9 is provided on the right side of the support frame 3 to move the pair of movable bases 7 so as to approach and separate from each other in a horizontal direction, and between the pair of guide rails 5 in the support frame 3. A ball screw 11 that is linked to the servo motor 9 and extends in the lateral direction is rotatably provided. Further, the ball screw 11 has a right screw portion 13a and a left screw portion 13b, and each movable base 7 is provided with a nut member 15 screwed to the corresponding screw portion 13a (or 13b). ing.

  Each movable base 7 is provided with an air cylinder 17 as an actuator, and each air cylinder 17 is a piston rod (movable rod) movable in the front-rear direction approaching and moving away from the outer peripheral surface of the molding drum D. 19 is provided. In place of the air cylinder 17, another actuator such as a hydraulic cylinder may be used.

  A ball bearing 21 is provided at the tip of the piston rod 19 in each air cylinder 17, and each ball bearing 21 is arbitrarily attached to the ball receiver 23 fixed to the tip of the piston rod 19 and the ball receiver 23. And a ball 25 that is rotatably supported in the direction and can press the tire constituent member T. In the embodiment of the present invention, each ball receiver 23 has a plurality of support portions 23 s for supporting the ball 25 by point contact or line contact, but the ball 25 is attached to each ball receiver 23. A plurality of small spheres that are rotatably supported in an arbitrary direction may be provided.

  Next, a method for crimping a tire constituent member according to an embodiment of the present invention will be described including the operation of the embodiment of the present invention.

  As shown in FIG. 1, the pair of piston rods 19 are moved rearward by driving the pair of air cylinders 17 and the pair of ball bearings 21 are moved rearward integrally with the corresponding piston rods 19. Further, a plurality of unvulcanized tire constituent members T are pressed by a pair of balls 25 that are rotatable in an arbitrary direction. Then, under the state where a plurality of unvulcanized tire constituent members T are pressed by the pair of balls 25, the molding drum D is rotated around the drum axis Dc by driving the drum motor, as shown in FIG. In addition, the pair of movable bases 7 are synchronously moved in the lateral direction by driving the servo motor 9 so that the pair of ball bearings 21 are separated from the corresponding movable base 7 in the lateral direction. Move. Thereby, the some unvulcanized tire structural member T can be crimped | bonded over the perimeter. In addition, after moving a pair of ball bearing 21 so that it may separate in a horizontal direction, you may move a pair of ball bearing 21 so that it may approach a horizontal direction, and it may move so that it may separate in a horizontal direction again. No (pressure-bonding method of the first tire constituent member according to the embodiment of the present invention).

  Here, the pair of ball bearings 21 are moved away from each other in the lateral direction under a state in which a plurality of unvulcanized tire constituent members T are pressed by a pair of balls 25 that can freely rotate in any direction. When a plurality of unvulcanized tire constituent members T are pressure-bonded, a pair of balls 25 (in other words, members pressing the unvulcanized tire constituent members T) are placed on the unvulcanized tire constituent members T. No skidding. For the same reason, even if the end side shape (including the outer diameter) of the plurality of unvulcanized tire constituent members T may change, the ball bearing for the drum axis Dc of the molding drum D It is possible to maintain the pressed state by the pair of balls 25 without changing the direction of the first 21 (first operation of the embodiment of the present invention).

  Further, by driving the pair of air cylinders 17 to move the pair of piston rods 19 in the rearward direction, the pair of ball bearings 21 are moved in the rearward direction integrally with the corresponding piston rods 19 as shown in FIG. As described above, the joint portion Tj ′ of the unvulcanized tire constituent member T ′ is pressed by the pair of balls 25 that are rotatable in any direction. Then, under a state where a plurality of unvulcanized tire constituent members T ′ are pressed by a pair of balls 25, the pair of movable bases 7 are moved in synchronization with each other by driving the servo motor 9 so as to be separated laterally. Thus, the pair of ball bearings 21 are moved so as to be separated from the corresponding movable base 7 in the lateral direction. As a result, the joint portion Tj ′ of the unvulcanized tire constituent member T ′ can be crimped. (Pressurization method of the 2nd tire constituent member concerning the embodiment of the present invention).

  Here, the pair of ball bearings 21 are moved away from each other in a state where the joint portion Tj ′ of the unvulcanized tire constituent member T ′ is pressed by the pair of balls 25 that are rotatable in any direction. Therefore, when the joint portion Tj ′ of the unvulcanized tire constituent member T ′ is pressure-bonded, the pair of balls 25 (in other words, members that press the unvulcanized tire constituent member T) are not added. The skid does not skid on the tire component T ′ (second action of the embodiment of the present invention).

  As described above, according to the embodiment of the present invention, when the plurality of unvulcanized tire constituent members T are crimped and when the joint portions Tj ′ of the unvulcanized tire constituent members T ′ are crimped, the balls 25 are formed. Since the non-vulcanized tire constituent members T and T ′ do not skid on the tire components T and T ′, the wrinkles Tw of the unvulcanized tire constituent members T and T ′ (see FIG. 6) can be obtained even when the lateral movement speed of the ball bearing 21 is increased. ) Can be sufficiently suppressed. Therefore, the quality of the green tire can be maintained while shortening the molding time of the green tire.

  In addition, when the plurality of unvulcanized tire constituent members T are pressure-bonded, the drum of the molding drum D may be used even if the shape on the end side of the plurality of unvulcanized tire constituent members T may change. Since the pressed state by the pair of balls 25 can be maintained without changing the direction of the ball bearing 21 with respect to the axis Dc, a mechanism for changing the direction of the ball bearing 21 with respect to the drum axis Dc of the molding drum D is unnecessary. The configuration of the stitcher 1 can be simplified and the stitcher 1 can be downsized.

  In addition, this invention is not restricted to description of the above-mentioned embodiment, In addition, it can implement in a various aspect. Further, the scope of rights encompassed by the present invention is not limited to these embodiments.

It is a top view of the stitcher which concerns on embodiment of this invention. It is the figure along the II-II line in FIG. It is a figure explaining the crimping | compression-bonding method of the 1st tire structural member which concerns on embodiment of this invention. It is a figure explaining the crimping | compression-bonding method of the 2nd tire structural member which concerns on embodiment of this invention. It is a figure which shows the crimping | compression-bonding process of the conventional tire structural member using a stitcher. It is a figure explaining the conventional problem.

Explanation of symbols

D molding drum Dc drum axis T tire component T 'tire component Tj' joint part 1 stitcher 3 support frame 5 guide rail 7 movable base 9 servo motor 11 ball screw 13a right screw part 13b left screw part 15 nut member 17 air Cylinder 19 Piston rod 21 Ball bearing 23 Ball receiver 23s Support section 25 Ball

Claims (3)

Crimping a plurality of unvulcanized tire constituent members laminated and pasted on the outer peripheral surface of the molding drum, or crimping a joint part of unvulcanized tire constituent members pasted on the outer peripheral surface of the molding drum In the stitcher used for
A support frame provided in the vicinity of the molding drum;
A movable base provided on the support frame so as to be movable in a lateral direction parallel to the drum axis of the molding drum;
Movable table moving means for moving the movable table in the lateral direction;
An actuator provided with a movable rod provided on the movable base and movable in a direction approaching and separating from the outer peripheral surface of the molding drum;
A ball bearing provided with the movable rod in the actuator, the ball bearing having a ball that can rotate in any direction and press the unvulcanized tire constituent member;
A stitcher characterized by comprising: In the method of crimping a tire component member that crimps a plurality of unvulcanized tire component members laminated and pasted on the outer peripheral surface of the molding drum,
Under the state where a plurality of unvulcanized tire constituent members are pressed by balls freely rotatable in any direction in the ball bearing, the ball bearing is rotated around the drum axis while the ball bearing is moved to the molding drum. A method for crimping a tire component member, comprising: crimping the plurality of unvulcanized tire component members over the entire circumference by moving in a lateral direction parallel to the drum axis. In the crimping method of the tire component member that crimps the joint portion of the unvulcanized tire component member that is attached to the outer peripheral surface of the molding drum,
The ball bearing is moved in a lateral direction parallel to the drum axis of the molding drum under a state in which the joint portion of the unvulcanized tire component member is pressed by a ball that can freely rotate in any direction in the ball bearing. A method for crimping a tire constituent member, wherein the joint portion of the unvulcanized tire constituent member is crimped by moving the joint portion.

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