JP2014069559A - Core conveyance carriage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To transfer a rigid core between two core conveyance carriages on a track.SOLUTION: A core conveyance carriage includes: a conveyance stand movable on a track; a slewing stand supported on the conveyance stand, capable of slewing around a vertical slewing axis; a horizontal moving stand supported on the slewing stand, and movable horizontally from a first position to a second position on a horizontal F-direction line passing the slewing axis; and a core support stand supported on the horizontal moving stand, and having a connection part detachably connectable to one support shaft part of the rigid core. An equatorial plane of the rigid core is positioned on the furthermore outside in the conveyance direction than the conveyance stand and the horizontal moving stand, in the slewing reference state in which the F-direction line becomes parallel to the conveyance direction, and on the second position.

Description

  The present invention relates to a core transfer carriage that can hold a rigid core so that it can be passed between two core transfer carriages on a track.

  In recent years, a tire forming method using a rigid core (hereinafter referred to as “core method”) has been proposed in order to improve the formation accuracy of the tire (see, for example, Patent Documents 1 and 2). The rigid core has an outer shape substantially equal to the tire lumen surface of the vulcanized tire. On the outer surface of the rigid core, an inner liner, a carcass ply, a belt ply, a sidewall rubber, a tread rubber, etc. A raw tire is formed by affixing tire constituent members sequentially. The green tire is inserted into the vulcanization mold together with the rigid core, and is thereby sandwiched between the rigid core as the inner mold and the vulcanization mold as the outer mold so that the green tire is vulcanized. Molded.

  As described above, in the core method, the rigid core is handled integrally with the tire without being removed from the tire from the start of formation of the raw tire to the end of vulcanization. Therefore, in the core method, a tire production line unique to the core method is required.

  Specifically, work stations for attaching the respective tire constituent members are arranged along a predetermined track. Then, the rigid core is moved on the track by using the core conveyance carriage, and the tire components are attached to the outer surface of the rigid core at the respective work stations in the order of arrangement. .

  However, in the production line, when the core conveyance carriage is moved from the start end to the end of the production line, the movement distance of the core conveyance carriage becomes very long. For this reason, there is a problem in that power transmission to the core carriage is complicated. Moreover, it is necessary to form the entire track in a straight line and / or an arc having a sufficiently large radius, and it is impossible to form a bent portion, a discontinuous portion, or the like in the track. For this reason, the degree of freedom of the trajectory and, in turn, the degree of freedom in designing the factory are greatly restricted, and the size reduction of the factory is impeded.

  For this reason, the inventor has proposed that each work station is provided with a core transport carriage and a tire component pasting device, and the rigid cores are sequentially transferred between the core transport carriages of adjacent work stations. According to this, the range of movement of the core transport carriage can be reduced to less than between adjacent work stations, and power transmission to the core transport carriage can be simplified. In addition, since a bent portion or a discontinuous portion of the track can be formed at the delivery position, it is possible to increase the degree of freedom of the track and the design of the factory and to reduce the size of the factory.

  However, this requires a new structure that can hold the rigid core so that it can be passed between the two core carriages on the track.

JP 2011-161896 A JP 2011-167799 A

  The present invention can deliver a rigid core between two core transfer carriages on the track, reduce the moving distance of the core transfer carriage to simplify power transmission, An object of the present invention is to provide a core transport carriage that can increase the degree of freedom of the track and the design of the factory, such as being able to be formed, and can contribute to the downsizing of the factory.

In order to solve the above problems, the invention of claim 1 of the present application transfers a rigid core that forms a raw tire by sequentially attaching tire constituent members to an outer surface between two core conveying carriages on a track. A core carriage that can be held
The rigid core includes a toroid-shaped core main body on which a green tire is formed, and a support shaft portion that is attached to the core main body and that projects concentrically with the core axis to the outer sides in the core axis direction. Prepared,
The core transport carriage is
A transport table movable in the transport direction on the track;
A swivel supported by the transfer table and capable of swiveling around a vertical swivel axis;
A horizontally movable table supported by the swivel table and capable of horizontally moving from a first position to a second position on a horizontal F direction line passing through the swivel axis;
A core support base supported by the horizontal movement base and having a connecting portion that can be detachably connected to one support shaft portion of the rigid core;
In the first position, the pivot axis passes through a core center point at which an equatorial plane of a rigid core whose one support shaft portion is held by the connecting portion intersects the core axis,
In addition, in the turning reference state in which the F-direction line is parallel to the transport direction and in the second position, the equatorial plane of the rigid core in which one support shaft portion is held by the connecting portion includes the transport stand, the swivel stand, and It is characterized by being located on the outer side in the transport direction than the horizontal moving table.

  According to a second aspect of the present invention, the horizontal moving table can be repositioned between the first position and the second position by a cylinder.

  According to a third aspect of the present invention, two core transport carriages adjacent to each other on the track have a rigidity medium in which one support shaft portion is held by one adjacent core transport carriage in the turning reference state and the second position. The rigid core is delivered by holding the other support shaft portion of the child by the other adjacent core transport carriage.

According to a fourth aspect of the present invention, the support shaft portion includes a connection hole portion concentrically recessed at an outer end in the core axis direction,
The connecting portion includes a connecting tube portion inserted into the connecting hole portion, and a ball lock mechanism that locks between the connecting hole portion and the connecting tube portion.

  Since the core conveyance cart of the present invention includes the conveyance platform, the core conveyance cart can move to a delivery position between adjacent core conveyance carts on both sides in the conveyance direction. Further, since the core transport carriage has a swivel base, the rigid core delivered from the core transport truck adjacent on one side in the transport direction is directed toward the core transport truck adjacent on the other side in the transport direction. It can be changed. By this change of direction, the rigid core delivered from the one core conveyance carriage can be delivered to the other core conveyance carriage.

  The core transport carriage includes a horizontal moving table supported by the swivel base. The horizontal movement table can move horizontally between a first position for attaching the tire constituent member to the rigid core and a second position for transferring the rigid core to the adjacent core conveyance carriage.

  Here, when the tire constituent member is affixed to the outer surface of the rigid core, keeping the contact posture where the outer peripheral surface of the rigid core and the tire constituent member are in contact at the center of the width of the tire constituent member suppresses wrinkles and deformation. It is necessary to improve the pasting accuracy. At this time, when the rigid core is turned around a vertical axis passing through the center point of the core, the contact posture can be maintained without changing the posture on the tire component side. That is, when attaching the tire component at the first position where the pivot axis of the swivel base passes through the center point of the rigid core, the outer peripheral surface of the complex rigid core is formed by turning the swivel base. In addition, the tire constituent member can be attached while maintaining the contact posture.

  In the second position, the equator plane of the held rigid core is positioned on the outer side in the transport direction than the transport table and the horizontal movement table. Thereby, the rigid cores can be transferred without causing collisions between the conveyance bases, between the swivel bases, and between the horizontal movement bases between the adjacent core conveyance carriages.

It is a top view which shows notionally one Example of the raw tire manufacturing line using the core conveyance trolley of this invention. It is a front view of a core conveyance cart It is a perspective view of a core conveyance trolley. It is a side view of a core conveyance trolley. It is a side view which shows delivery between the core conveyance carts of a rigid core. It is a disassembled perspective view of a rigid core. It is sectional drawing which shows the connection structure of a support shaft part and a connection part. It is sectional drawing of the green tire formed with the manufacturing line of this invention. (A) is a perspective view of a rubber strip that forms a rubber member among tire constituent members, (B) is a perspective view of a cord strip that forms a cord ply, and (C) is a perspective view of a rubberized bead wire that forms a bead core. FIG. (A), (B) is explanatory drawing which shows the formation method of the carcass ply by a cord strip, (C), (D) is explanatory drawing which shows the formation method of the belt ply by a cord strip. (A), (B) is sectional drawing which shows a contact attitude | position with the rigid core of a tire structural member.

Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 conceptually shows an embodiment of a raw tire production line 1 using a core transport carriage 2 of the present invention. The raw tire production line 1 includes a track 3 through which the core transport carriage 2 passes and a plurality of work stations 4 arranged along the track 3. And the raw tire 6 is formed by affixing the tire structural member T on the outer surface of the rigid core 5 moving on the track 3 in the order of the arrangement at each work station 4.

FIG. 8 shows an embodiment of the green tire 6 formed on the production line 1. This raw tire 6 is, in this example,
(A) Carcass T1 extending from the tread portion 6a to the sidewall portion 6b to the bead portion 6c,
(A) A belt layer T2 disposed radially outside the carcass T1 and inside the tread portion 6a;
(C) a band layer T3 disposed on the outer side in the radial direction of the belt layer T2.
(D) Tread rubber T4 forming the outer surface of the tread portion 6a,
(E) a sidewall rubber T5 forming the outer surface of the sidewall portion 6b;
(F) Chafer rubber T6 for preventing rim displacement that forms the outer surface of the bead portion 6c;
(G) Inner liner rubber T7 that forms the inner surface of the tire.
(G) a bead core T8 disposed on the bead part 6c and fixing the inner end in the radial direction of the carcass T1, and (g) a plurality of tire configurations that are bead apex rubber T9 for bead reinforcement rising from the bead core T8. Formed by member T.

  The carcass T1 is formed of one or more carcass plies T1a in this example, in which a carcass cord arranged at an angle of 90 ° with respect to the tire equator C is covered with a topping rubber. The belt layer T2 has two or more belt plies T2a, in this example, two belt plies T2a, each of which is covered with a topping rubber with a belt cord arranged at an angle θ (not shown) of 10 to 40 ° with respect to the tire equator C, It is formed from T2b. The band layer T3 is formed of one or more band plies T3a in this example, in which band cords arranged in the tire circumferential direction are covered with a topping rubber. The tread rubber T4 is formed of a tread base rubber T4a on the radially inner side and a tread cap rubber T4b on the radially outer side. The bead core T8 includes inner and outer bead core portions T8a and T8b that fix the inner end portion in the radial direction of the carcass T1 from both sides in the tire axial direction. The bead apex rubber T9 is formed of inner and outer apex rubber portions T9a and T9b rising from the inner and outer bead core portions T8a and T8b.

  Among these tire constituent members T, the rubber members which are the tread rubber T4, the side wall rubber T5, the chafer rubber T6, the inner liner rubber T7, and the bead apex rubber T9 are formed in a long tape shape as shown in FIG. The rubber strip 8 is spirally wound to form a so-called strip wind method (STW method). The rubber composition and the cross-sectional dimension of the rubber strip 8 are set for each tire constituent member T.

  Of the tire constituent members T, the cord plies that are the carcass ply T1a, the belt plies T2a and T2b, and the band ply T3a are formed using the cord strip 9 shown in FIG. 9B. The cord strip 9 has a long tape shape in which an array of tire cords 9a aligned in the length direction is covered with a topping rubber 9b. In the case of the carcass ply T1a, as shown in FIGS. 10A and 10B, a strip 9A obtained by cutting the cord strip 9 with a predetermined length is arranged so that the tire cord 9a is perpendicular to the tire equator C. In this direction, it is formed by sticking sequentially in the tire circumferential direction. In the case of the belt plies T2a and T2b, as shown in FIGS. 10C and 10D, a strip 9B obtained by obliquely cutting the cord strip 9 by a predetermined length is used, and the tire cord 9a becomes the tire equator C. On the other hand, it is formed by sequentially pasting in the tire circumferential direction in a direction inclined at the angle θ. The band ply T3a is formed by continuously winding the cord strip 9 spirally in the tire circumferential direction. The material, thickness, distance between cords, rubber composition of the topping rubber 9b, and the like of the tire cord 9a in the cord strip 9 are set for each tire constituent member T.

  Of the tire component T, the inner and outer bead core portions T8a and T8b are formed by winding the rubberized bead wire 7 shown in FIG. 9C in a spiral shape from the inner side to the outer side in the radial direction. .

  Next, as shown in FIG. 6, the rigid core 5 has a toroid-shaped core body 11 and is attached to the core body 11 and concentrically with the core axis 5j. And a support shaft portion 16 projecting from the head.

  Specifically, the rigid core 5 of this example includes a core body 11, a cylindrical core 12 inserted into the center hole 11 h of the core body 11, and both axial direction sides of the core body 11. A pair of side wall bodies 13L, 13U. The outer surface 11s of the core body 11 has an outer shape substantially equal to the tire cavity surface of the vulcanized tire, and the raw tire 6 is formed on the outer surface 11s. The core body 11 is composed of a plurality of segments 14 divided in the tire circumferential direction. The segment 14 includes first and second segments 14A and 14B that are alternately arranged in the tire circumferential direction. Both end surfaces in the circumferential direction of the first segment 14A are inclined in a direction in which the circumferential width gradually decreases inward in the radial direction. Further, both end surfaces in the circumferential direction of the second one segment 14B are inclined in a direction in which the circumferential width gradually increases inward in the radial direction.

  On the outer peripheral surface of the core 12 and the inner peripheral surface of the segment 14, one of the dovetail groove 15a and the dovetail tenon 15b extending in the direction of the core axis and engaging with each other is formed. Thereby, the core 12 and the segment 14 are connected so that relative movement is possible only in the core axis direction. A side wall 13L is fixed to one end of the core 12 in the axial direction, and a side wall 13U is detachably attached to the other end. In this example, the side wall 13U is screwed into the center hole 12h of the core 12.

  The support shaft portion 16 protrudes from the side wall bodies 13L and 13U. Each support shaft portion 16 has a connecting hole portion 17 concentrically recessed at an outer end portion thereof, and a circumferential groove 17 </ b> A is provided on the inner peripheral surface of the connecting hole portion 17. The support shaft portion 16 is automatically and detachably connected to a connecting portion 42 </ b> B provided in the core transport carriage 2.

  Next, as shown in FIG. 1, the track 3 of the production line 1 is formed as a bent track bent in a U shape in this example. Specifically, the track 3 is formed of linear horizontal track portions 3A and 3C extending in parallel with each other and a straight vertical track portion 3B extending between one end portions of the horizontal track portions 3A and 3C. Is done. Then, the other end portion of the horizontal track portion 3A is set as the start end position P1, and the track portion 3A → the track portion 3B → the track portion 3C, to the end position P2, which is the other end portion of the horizontal track portion 3C, The rigid core 5 is guided. A bent portion Qa (also a discontinuous portion Qb) is formed at the intersection between the track portion 3A and the track portion 3B and at the intersection between the track portion 3B and the track portion 3C. In this example, the track 3 is formed by a pair of rails 20 parallel to each other.

  Next, each of the plurality of work stations 4 arranged along the track 3 includes a core transport carriage 2 that can move on the track 3 and a rigid core held by the core transport cart 2. 5, a sticking device 21 for sticking the tire constituent member T is disposed.

As the pasting device 21,
(1) A rubber strip applicator for forming the tread rubber T4, sidewall rubber T5, chafer rubber T6, inner liner rubber T7, and bead apex rubber T9 by adhering the rubber strip 8.
(2) A cord strip sticking device that forms the carcass ply T2a by sticking a strip 9A cut from the cord strip 9,
(3) A cord strip applicator for forming the belt plies T2a and T2b by adhering strips 9B cut from the cord strip 9,
(4) A cord strip applicator for forming the band ply T3a by attaching the cord strip 9;
(5) A wire sticking device that forms the bead core portions T8a and T8b by sticking the rubberized bead wire 7.
These are arranged along the track 3 in the order in which the raw tires 6 are formed. As a representative, a rubber strip sticking device is illustrated in FIG. 2, but various sticking devices 21 having various structures can be adopted.

  Next, as shown in FIGS. 2 to 4, the core transport carriage 2 holds the rigid core 5 so as to be rotatable around a horizontal core axis 5 j and can move on the track 3. . Further, the core transport carriage 2 belongs to the adjacent work station 4 with the rigid core 5 held after the tire constituent member T is pasted by the pasting device 21 of the work station 4 to which the core transport carriage 2 belongs. It can be delivered to the core transport carriage 2. That is, the core transport carriage 2 is configured to be able to pass the rigid core 5 between the two core transport carriages 2 and 2 adjacent on the track 3.

  Specifically, the core transport carriage 2 includes a transport base 40 that can move in the transport direction on the track 3, a swivel base 41 supported by the transport base 40, and a horizontal movement supported by the swivel base 41. A base 47 and a core support base 42 supported by the horizontal movement base 47 are provided.

  The transport table 40 is guided by the pair of rails 20 forming the track 3 and can move on the track 3 in the transport direction. As the driving means 43 of the transport table 40, in this example, a servo motor M1 that is attached to the transport table 40, a gear 44A that is rotationally controlled by the servo motor M1, and a gear laid along the rail 20 and meshed with the gear 44A. The thing provided with the gear rack mechanism 44 which has the rack 44B is illustrated. However, for example, a known ball screw mechanism or the like can also be suitably employed.

  In this example, a ring-shaped guide portion 40 </ b> A is disposed on the upper surface of the transport table 40. Further, a boss portion 41 </ b> A that is pivotally supported by a bearing 45 with the guide portion 40 </ b> A protrudes from the lower surface of the swivel base 41. Thus, the swivel base 41 is supported so as to be capable of swiveling around a swivel axis J that is concentric and perpendicular to the guide portion 40A. As the drive means 46 of the swivel base 41, in this example, a servo motor M2 attached to the transport base 40 is used, and its output shaft is concentrically connected to the boss portion 41A.

  Further, the horizontal moving table 47 is guided by a guide rail 41B laid on the upper surface of the swivel base 41, and on a horizontal F direction line F1 passing through the swivel axis J, the first position N1 to the second position N2 Can move horizontally. In this example, for example, a rodless cylinder 48A attached on the swivel base 41 is used as the driving means 48 of the horizontal movement base 47. By the cylinder 48A, the horizontal moving table 47 can change the position between the first position N1 and the second position N2.

  The core support base 42 includes a support base main body 42A standing on the horizontal movement base 47 and a connecting portion 42B provided on the support base main body 42A. The connecting portion 42B is detachably connected to one support shaft portion 16 of the rigid core 5.

  The connecting portion 42B is rotationally driven around a horizontal core axis 5j by a drive motor M3 attached to the support base body 42A. As shown in FIG. 7, the connecting portion 42 </ b> B includes a connecting tube portion 57 inserted into the connecting hole portion 17 provided in the support shaft portion 16 of the rigid core 5, and the connecting hole portion 17 and the connecting tube portion 57. A ball locking mechanism 58 for locking between the two.

  The ball lock mechanism 58 includes a rigid ball 60, a piston piece 63, and a plunger 64. The rigid ball 60 is held in a plurality of through holes 59 formed in the peripheral wall of the connecting cylinder portion 57. The through holes 59 are distributed in the circumferential direction and penetrate the circumferential wall inward and outward in the radial direction. The piston piece 63 is accommodated in a cylinder chamber 61 provided in the connecting portion 42B. The piston piece 63 moves in and out of the axial direction in the cylinder chamber 61 by supplying and discharging compressed air to and from the cylinder chamber 61. The plunger 64 is disposed in the center hole 57H of the connecting cylinder portion 57, and is connected to the piston piece 63 so as to be integrally movable.

  The plunger 64 pushes each rigid ball 60 outward in the radial direction by movement outward in the axial direction by the piston piece 63. Accordingly, each rigid ball 60 is pressed against the circumferential groove 17A, and the support shaft portion 16 and the connecting portion 42B are locked. Further, the plunger 64 is released from the rigid ball 60 by the movement of the piston piece 63 inward in the axial direction. As a result, the connection portion 42B is released from the connection with the support shaft portion 16 and removed.

  Here, the first position N1 is a position for attaching the tire constituent member T to the rigid core 5, and the second position N2 is a position where the rigid core 5 is connected to the adjacent core conveyance carriage 2. It is a position for delivery.

  As shown in FIG. 3, at the first position N1, the pivot axis J is a core center point where the equator plane 5S of the rigid core 5 held by the connecting portion 42B intersects the core axis 5j. Go through 5P. Here, when the tire constituent member T is attached to the outer surface of the rigid core 5, as illustrated in FIG. 11, the outer peripheral surface of the rigid core 5 and the tire constituent member T are the center of the width of the tire constituent member T. It is necessary to maintain the contact posture in contact with Tc in order to suppress wrinkles and deformation and increase the pasting accuracy. At this time, when the rigid core 5 is turned around a vertical axis passing through the core center point 5P, it is easy to maintain the contact posture without changing the posture on the tire component T side. It becomes. That is, when the tire constituent member T is pasted at the first position N1 where the pivot axis J of the swivel base 41 passes through the core center point 5P, the complicated rigid core 5 is caused by the swivel of the swivel base 41. It is easy to attach the tire constituent member T to the outer peripheral surface of the tire while maintaining the contact posture.

  On the other hand, at the second position N2, as shown in FIG. 5, the equatorial plane 5S of the rigid core 5 held by the connecting portion 42B is in the turning reference state R in which the F direction line F1 is parallel to the transport direction. Is located on the outer side in the transport direction than the transport table 40, the swivel table 41 and the horizontal movement table 47. Therefore, when the two core transport carriages 2 and 2 in which the horizontal movement base 47 is in the second position N2 and the turntable 41 is in the turn reference state R approach each other, the transport stands 40, the turntables 41, The horizontal support bases 47 do not collide with each other, and the other support shaft part 16 of the rigid core 5 in which the one support shaft part 16 is held by the one core transport carriage 2 is connected to the other adjacent core part. The transport carriage 2 can hold it, so that the rigid core 5 is delivered.

  Then, by passing the rigid core 5 between the core transport carts 2 and 2, the movement range of the core transport cart 2 can be reduced to between the adjacent work stations 4 and 4. The distribution of power to 2 can be simplified. Further, since the track bending portion Qa and the discontinuous portion Qb can be formed at the delivery position, the degree of freedom of the track 3 and factory design can be increased, and the factory can be downsized.

  As mentioned above, although especially preferable embodiment of this invention was explained in full detail, this invention is not limited to embodiment of illustration, It can deform | transform and implement in a various aspect.

2 Core transport carriage 3 Track 5 Rigid core 5j Core axis 5P Core center point 6 Raw tire 11 Core body 16 Support shaft 17 Connection hole 40 Transport base 41 Swivel base 42B Connection section 43 Core support base 47 Horizontal moving table 48A Cylinder 57 Connecting cylinder part 58 Ball lock mechanism J Turning axis N1 First position N2 Second position R Turning reference state T Tire component

Claims (4)

A core conveyance carriage capable of holding a rigid core forming a raw tire by sequentially pasting tire constituent members on an outer surface so as to be able to be transferred between two core conveyance carriages on a track,
The rigid core includes a toroid-shaped core main body on which a green tire is formed, and a support shaft portion that is attached to the core main body and that projects concentrically with the core axis to the outer sides in the core axis direction. Prepared,
The core transport carriage is
A transport table movable in the transport direction on the track;
A swivel supported by the transfer table and capable of swiveling around a vertical swivel axis;
A horizontally movable table supported by the swivel table and capable of horizontally moving from a first position to a second position on a horizontal F direction line passing through the swivel axis;
A core support base supported by the horizontal movement base and having a connecting portion that can be detachably connected to one support shaft portion of the rigid core;
In the first position, the pivot axis passes through a core center point at which an equatorial plane of a rigid core whose one support shaft portion is held by the connecting portion intersects the core axis,
In addition, in the turning reference state in which the F-direction line is parallel to the transport direction and in the second position, the equatorial plane of the rigid core in which one support shaft portion is held by the connecting portion includes the transport stand, the swivel stand, and A core transport carriage characterized by being positioned on the outer side in the transport direction than the horizontal moving base.   The core transport carriage according to claim 1, wherein the horizontal moving table can be repositioned between the first position and the second position by a cylinder.   Two adjacent core transport carts on the track are in the turning reference state and in the second position, respectively, and the other support shaft of the rigid core whose one support shaft portion is held by the adjacent core transport cart adjacent to each other. 3. The core conveyance carriage according to claim 1, wherein the rigid core is delivered by holding the portion by the other adjacent core conveyance carriage. The support shaft portion includes a connecting hole portion concentrically recessed at an outer end in the core axis direction,
The said connection part is equipped with the ball-locking mechanism which locks between the connection cylinder part inserted in the said connection hole part, and the said connection hole part and a connection cylinder part, The any one of Claims 1-3 characterized by the above-mentioned. The core carrier cart described in Crab.

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