WO2012176565A1 - 剛性中子 - Google Patents
剛性中子 Download PDFInfo
- Publication number
- WO2012176565A1 WO2012176565A1 PCT/JP2012/062822 JP2012062822W WO2012176565A1 WO 2012176565 A1 WO2012176565 A1 WO 2012176565A1 JP 2012062822 W JP2012062822 W JP 2012062822W WO 2012176565 A1 WO2012176565 A1 WO 2012176565A1
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- WIPO (PCT)
- Prior art keywords
- core
- axial direction
- rigid
- segment
- inward
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/08—Building tyres
- B29D30/10—Building tyres on round cores, i.e. the shape of the core is approximately identical with the shape of the completed tyre
- B29D30/12—Cores
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0661—Rigid cores therefor, e.g. annular or substantially toroidal cores
Definitions
- the present invention relates to a rigid core capable of accurately and efficiently performing removal of a rigid core from a lumen of a pneumatic tire and reassembly of the removed rigid core.
- a tire forming method as shown in FIG. 11A has been proposed in order to increase the formation accuracy of a pneumatic tire (see, for example, Patent Document 1).
- a rigid core a having an outer shape corresponding to the tire inner surface shape of a vulcanized finished tire is used, and an inner liner, a carcass ply, a belt ply, and a sidewall are formed on the rigid core a.
- the tire component members such as rubber and tread rubber are sequentially attached to form an unvulcanized tire t.
- the unvulcanized tire t is put into the vulcanizing mold b together with the rigid core a, and is inflated between the rigid core a as the inner mold and the vulcanized mold b as the outer mold.
- the tire is vulcanized.
- the core body a1 of the rigid core a is divided in the tire circumferential direction so that it can be disassembled and removed from the lumen of the pneumatic tire after vulcanization molding.
- a plurality of core segments c includes first and second core segments c1 and c2 that are alternately arranged in the circumferential direction.
- the dividing surfaces at both ends in the circumferential direction are inclined in the direction in which the circumferential width decreases toward the inside in the radial direction.
- the division surface of the circumferential direction both ends inclines in the direction which the circumferential direction width
- Such a rigid core a is removed from the vulcanized tire by disassembling the core body a1 by sequentially removing the rigid core a from the second core segment c2 one by one inward in the radial direction. Can do.
- each core segment c is assembled in an annular shape by fixing its inner end in the radial direction to the core part d1 of the frame d having an annular core part d1.
- the frame d can be attached and detached from the opening f by opening one end of the core part d1.
- an object of the present invention is to provide a rigid core that can be assembled and disassembled with high accuracy, stability and efficiency without using bolts, and can greatly contribute to the automation of the assembly and disassembly.
- the invention of claim 1 of the present application is a rigid core comprising an annular core body provided on the outer surface with a molding surface for molding a lumen surface of a pneumatic tire,
- the core body comprising a plurality of core segments divided in the tire circumferential direction and movable inward in the radial direction;
- a cylindrical core that is inserted into the center hole of the core body to prevent the movement of each core segment inward in the radial direction;
- a pair of side plates disposed on both sides of the core body in the axial direction, and holding the core body between the inner side surfaces to prevent movement of each core segment in the axial direction;
- a first dovetail portion comprising one of a dovetail groove or an ant tenon extending in the axial direction is formed on the outer peripheral surface of the core, and extending in the axial direction on the inner peripheral surface of each core segment.
- a second dovetail portion formed of the other of an ant groove or an ant tenon engaged with the first ant joint portion is formed;
- the side plate on one side in the axial direction is fixed at one end of the core, and the side plate on the other side in the axial direction and the end on the other side of the core are attached and detached by a connecting means having a ball lock mechanism. It is characterized by freedom.
- the connecting means includes a connecting cylinder portion projecting from an inner surface of the other side plate and inserted into a center hole of the core, and between the core and the connecting cylinder portion.
- the ball lock means includes A rigid ball that is dispersedly arranged in the circumferential direction in the connecting cylinder part and held in a plurality of through holes penetrating inward and outward in the radial direction; A plunger that is arranged in the connecting cylinder portion and moves outward in the axial direction to push up each rigid ball radially outward, and presses and locks each rigid ball into a circumferential groove provided in the central hole of the core; A biasing spring that biases the plunger outward in the axial direction; And a release rod for releasing the lock between the core and the connecting tube portion by moving the plunger inward in the axial direction and releasing the push-up of the rigid ball radially outward. Yes.
- the core segment has a large width in the circumferential direction, and the split surfaces at both ends in the circumferential direction are inclined in such a direction that the circumferential width decreases toward the inside in the radial direction.
- the child segments and the first core segments are alternately arranged in the circumferential direction, and the circumferential width is small, and the circumferential width is increased inward in the radially inward direction on the divided surfaces at both circumferential ends. It is characterized by being configured to be movable inward in the radial direction by being composed of the second core segment inclined to the center.
- the invention of claim 4 is characterized in that the side plates on one side and the other side in the axial direction each include a support shaft portion protruding outward in the axial direction.
- the present invention includes a cylindrical core inserted in the core body and a pair of side plates disposed on both sides in the axial direction of the core body. One end of the core is fixed to the one side plate.
- a first dovetail portion extending in the axial direction is formed on the outer peripheral surface of the core.
- a second dovetail portion extending in the axial direction is formed on the inner peripheral surface of each core segment.
- the rigid core includes a connecting means having a ball lock mechanism for detachably attaching the side plate on the other side in the axial direction and the end on the other side of the core.
- a rigid core enables the other side plate to be detachably attached to the core with one touch without using bolts. Thereby, the assembly work efficiency and the disassembly work efficiency are greatly improved. Therefore, such a rigid core can greatly contribute to the automation of assembly and disassembly of each core segment.
- the core body is held to prevent movement of each core segment in the axial direction. Therefore, the engagement between the first and second dovetail joints, the movement of the core segment to the inside in the radial direction by the core, and the axial direction of the core segment by the clamping between the side plates The assembled core segments are fixed by the movement prevention. For this reason, the core body is maintained with high accuracy.
- FIG. 1 It is sectional drawing which shows one Example of the rigid core of this invention. It is a top view which shows a core main body with a core. It is a disassembled perspective view of a rigid core. It is an enlarged view which shows the engagement state of the 1st, 2nd dovetail part.
- (A), (b) is sectional drawing explaining a connection means. It is sectional drawing explaining a core connection means.
- (A)-(C) are sectional views for explaining the order of disassembling the rigid core. It is sectional drawing explaining taking out from the tire of a core main body, and an assembly. It is a top view explaining taking out from a tire of a core main part, and assembling. It is sectional drawing explaining the attachment to the core of the other side plate.
- (A) is sectional drawing which shows the formation method of the pneumatic tire which used the rigid core
- (B) is a side view of the axial direction of a rigid core.
- the rigid core 1 of the present embodiment includes an annular core body 3.
- the core body 3 is provided with a molding surface 2 for molding the lumen surface Ts of the pneumatic tire T on the outer surface thereof.
- a tire structural member is affixed sequentially on the said molding surface 2 of this core main body 3, and an unvulcanized tire is formed.
- the tire constituent member includes, for example, an inner liner, a carcass ply, a belt ply, sidewall rubber, tread rubber, and the like.
- the unvulcanized tire is put together with the rigid core 1 into the vulcanization mold, and the pneumatic tire T is vulcanized.
- FIG. 1 shows a state in which the rigid core 1 is taken out from the vulcanization mold together with the vulcanized pneumatic tire T and transferred onto the holding shaft 4.
- the rigid core 1 includes the core body 3, a cylindrical core 5, and a pair of side plates 6L and 6U.
- the core 5 is inserted into the center hole 3H of the core body 3.
- the pair of side plates 6L and 6U are disposed on both sides of the core body 3 in the axial direction.
- the core body 3 includes a bulging portion 3B on the radially inner side of the main portion 3A having the molding surface 2.
- the bulging portion 3B has a tapered surface 7 that is inclined outward in the axial direction toward the radially inward direction, and bulges outward in the axial direction.
- a concave portion 8 concentric with the core body 3 is formed in the core body 3.
- steam which is a heat medium for vulcanization heating
- the heat source for vulcanization heating such as an electric heater may be accommodated in the recess 8 without being limited thereto.
- the recess 8 is also used as a hook when the core body 3 is disassembled and hung from the tire T and taken out.
- the core body 3 is composed of a plurality of core segments 9 divided in the tire circumferential direction as shown in FIGS.
- the core segment 9 includes first and second core segments 9A and 9B that are alternately arranged in the circumferential direction. 9 A of 1st core segments incline in the direction where the division
- the core 5 has a cylindrical shape.
- the core 5 is inserted into the central hole 3H of the core body 3. Thereby, the movement of each core segment 9 inward in the radial direction is prevented.
- An end portion on one side of the core 5 in the axial direction is fixed to an inner surface of the side plate 6L on the one side in the axial direction.
- a bolt 10 shown in FIG. 1
- the side plate 6L and the core 5 can be fixed by, for example, welding.
- the one side plate 6L includes a side plate body 11 having a disc-shaped substrate portion 11A and a flange portion 11B.
- a support shaft portion 12 that protrudes outward in the axial direction is provided concentrically on the outer surface of the substrate portion 11A.
- the flange portion 11 ⁇ / b> B is provided on the outer circumferential edge of the disc-shaped substrate portion 11 ⁇ / b> A and contacts the tapered surface 7 of the core body 3.
- the flange portion 11B has the same inclination as the tapered surface 7.
- Such a flange portion 11B can align the side plate 6L and the core body 3 concentrically. Further, the bulging portion 3B of the core body 3 can be sandwiched and held between the flange portion 11B and the core 5.
- a first dovetail portion 16 is formed on the outer peripheral surface of the core 5.
- a second dovetail portion 17 is formed on the inner peripheral surface of each core segment 9.
- the first ant joint portion 16 includes one of the ant groove 14 or the ant tenon 15 extending continuously in the axial direction.
- the second dovetail portion 17 extends in the axial direction and engages with the first dovetail portion 16, and includes the other of the dovetail groove 14 or the ant tenon 15.
- a dovetail groove 14 is formed as the first dovetail joint 16 and an ant tenon 15 is formed as the second dovetail joint 17 is shown.
- the present invention is not limited thereto, and conversely, the ant tenon 15 may be formed as the first ant joint part 16, and the ant groove 14 may be formed as the second ant joint part 17.
- the dovetail groove 14 and the ant tenon 15 have a substantially trapezoidal cross section in which both side surfaces are inclined in the direction of increasing the width toward the groove bottom and tenon tip, as is well known.
- the dovetail groove 14 and the ant tenon 15 are connected to each other so as to be relatively movable only in the axial direction when one and the other are fitted together.
- the side plate 6U on the other side in the axial direction includes a side plate body 20 having a disk-shaped substrate portion 20A and a flange portion 20B.
- the flange portion 20 ⁇ / b> B is provided on the outer circumferential edge of the disc-shaped substrate portion 20 ⁇ / b> A and contacts the tapered surface 7 of the core body 3.
- the side plate body 20 includes The support shaft portion 21 and the connecting cylinder portion 22 are provided concentrically.
- the support shaft portion 21 protrudes outward in the axial direction from the outer surface of the side plate body 20.
- the connecting tube portion 22 protrudes inward in the axial direction from the inner surface and is inserted into the center hole 5H of the core 5.
- the other side plate 6U and the other end of the core 5 are detachably connected by a connecting means 23 having a ball lock mechanism.
- the connecting means 23 includes the connecting cylinder portion 22 projecting from the other side plate 6U, and a ball locking means 24 for locking between the connecting cylinder portion 22 and the core 5.
- the ball lock means 24 includes a plurality of rigid balls 25, a plunger 26 that pushes up the rigid balls 25, a biasing spring 27 that biases the plunger 26, and a rigidity.
- a release rod 28 for releasing the push-up of the ball 25 is provided.
- the rigid balls are distributed in the circumferential direction on the connecting cylinder portion 22.
- the plunger 26 is arranged in the connecting cylinder portion 22 and moves outward in the axial direction to push up the rigid balls 25 outward in the radial direction.
- the biasing spring 27 biases the plunger 26 outward in the axial direction.
- the release rod 28 moves the plunger 26 inward in the axial direction to release the push-up of the rigid ball 25 outward in the radial direction.
- the connecting cylinder portion 22 has a plurality of through holes 30 penetrating inward and outward in the radial direction.
- the rigid ball 25 is held in the through hole 30 so as to be able to protrude and retract from the outer peripheral surface of the connecting cylinder portion 22.
- the diameter of the rigid ball 25 is set to be larger than the thickness of the connecting cylinder part 22 and larger than the diameter of the through hole 30 on the outer peripheral surface of the connecting cylinder part 22.
- the plunger 26 includes a cylindrical base tube portion 26A and side plate portions 26B and 26C arranged inside and outside in the axial direction.
- the cylindrical base tube portion 26A is inserted into the connecting tube portion 22 so as to be slidable in the axial direction.
- On the outer peripheral surface of the base tube portion 26A a push-up surface portion 26A1 and a depression recess 26A2 disposed on the outer side in the axial center direction are disposed.
- the push-up surface portion 26A1 pushes the rigid ball 25 outward in the radial direction and presses it against the circumferential groove 5Ha provided in the center hole 5H of the core 5.
- the depression recess 26A2 causes the rigid ball 25 to fall.
- the push-up is released, and the lock between the connecting cylinder portion 22 and the core 5 can be released.
- an inner cylinder part 31 concentric with the connecting cylinder part 22 is provided on the inner side surface of the side plate body 20.
- a stopper piece 32 extending in the radial direction toward the base tube portion 26A is fixed to the inner end in the axial direction of the inner tube portion 31.
- the biasing spring 27 is disposed between the stopper piece 32 and the outer side plate portion 26C.
- the plunger 26 of this example can move between the movement limit state Y1 and the movement limit state Y2.
- the movement limit state Y1 means that the outer side plate portion 26C comes into contact with the inner side surface of the side plate main body 20 as shown in FIG.
- the movement limit state Y2 means that the stepped portion 33 provided on the inner peripheral surface of the base tube portion 26A comes into contact with the stopper piece 32, as shown in FIG.
- the urging spring 27 urges the plunger 26 outward in the axial direction, and normally places the plunger 26 in the movement limit state Y1 outward in the axial direction.
- the release rod 28 extends outward in the axial direction from the outer side plate portion 26 ⁇ / b> C through the insertion hole 34 provided in the support shaft portion 21. Then, when the release rod 28 is pushed inward in the axial direction, the plunger 26 moves to the movement limit state Y2. For this reason, the rigid ball 25 falls into the depression 26A2. Thereby, the lock
- a holding shaft 35 is connected to the support shaft portion 21 of the other side plate 6U via a core connecting means 36.
- the release rod 28 is operated via an operation bar 35 ⁇ / b> A provided on the holding shaft 35.
- the core connecting means 36 has a ball lock mechanism in this example.
- the core connecting means 36 includes a connecting hole portion 46, a core connecting cylinder portion 47, and a ball lock means 48.
- the connecting hole portion 46 is concentrically recessed at the outer end portion of the support shaft portion 21 and is provided with a circumferential groove 46A on the inner peripheral surface.
- the core connecting cylinder portion 47 is concentrically protruded from the outer end portion of the holding shaft 35 and is inserted into the connecting hole portion 46.
- the ball locking means 48 locks between the connecting hole 46 and the core connecting cylinder 47.
- the ball lock means 48 includes a rigid ball 50, a piston piece 53, and a plunger 54.
- the rigid balls 50 are held in a plurality of through holes 49 distributed in the circumferential direction in the core connecting cylinder portion 47 and penetrating inward and outward in the radial direction.
- the piston piece 53 is accommodated in a cylinder chamber 51 provided in the holding shaft 35.
- the piston piece 53 can move in and out of the axial direction in the cylinder chamber 51 by supplying and discharging compressed air to and from the cylinder chamber 51.
- the plunger 54 is disposed in the center hole 47H of the core connecting tube portion 47 and is connected to the piston piece 53 so as to be movable together.
- the plunger 54 can move outward in the axial direction in the center hole 47H of the core connecting cylinder portion 47 by the piston piece 53. By this movement, the outer peripheral surface of the plunger 54 pushes up each of the rigid balls 50 outward in the radial direction. Thereby, each rigid ball 50 is pressed against the circumferential groove 46A, and the connecting hole 46 and the core connecting cylinder 47 can be locked. Further, the plunger 54 can be moved inward in the axial direction within the center hole 47H of the core connecting cylinder portion 47 by the piston piece 53. Thereby, the pushing-up of the rigid ball 50 outward in the radial direction is released, and the lock between the connecting hole portion 46 and the core connecting tube portion 47 is released.
- the outer peripheral surface of the plunger 54 has a cone surface that tapers outward in the axial direction.
- the support shaft portion 12 of the one side plate 6L and the holding shaft 4 are also connected via the core connecting means 36 in this example.
- FIG. 1 shows a state in which a rigid core 1 with a pneumatic tire taken out from a vulcanization mold is transferred onto a lower holding shaft 4. 7A and 7B, the upper holding shaft 35 is lowered from above, and the holding shaft 35 and the support shaft portion 21 of the side plate 6U located therebelow are connected to the core.
- the means 36 is used for one-touch connection. Thereafter, the operation bar 35A provided on the holding shaft 35 is operated, and the release rod 28 of the connecting means 23 is pushed. For this reason, the plunger 26 moves inward in the axial direction, and the lock between the core 5 and the connecting cylinder portion 22 is released.
- the side plate 6U on one side can be removed from the rigid core 1.
- the operation using the operation bar 35A can be performed by appropriate means such as manual operation or remote operation using a cylinder. Further, the removed side plate 6U is transferred to another place together with the holding shaft 35 while being held by the core connecting means 36.
- the annular core body receiver 40 rises to support the core body 3 from below. Thereafter, the holding shaft 4 is lowered together with the other side plate 6L. As a result, the side plate 6L and the core 5 are integrally removed from the rigid core 1. The removed side plate 6L and the core 5 are transferred to the assembly place K (shown in FIG. 8) together with the holding shaft 4 while being held by the core connecting means 36.
- the core segments 9 are taken out one by one from the core body 3 held on the core body receiver 40.
- the taken-out core segment 9 is transferred to the assembly location K and is sequentially attached around the core 5.
- a holding jig 41 attached to the robot arm is used for taking out the core segment 9, for example.
- the hook-shaped holding jig 41 is hooked on the concave portion 8 to move each core segment 9 inward in the radial direction, and then the core segment 9 is suspended to assemble the assembly place K. Transport to.
- the core segments 9 are taken out and reassembled at the assembly location K one by one from the second core segment 9B as described above. That is, after all the second core segments 9B are taken out, the first core segments 9A are taken out one by one.
- first and second dovetail sections 16 and 17 are formed on the core 5 and the core segments 9 respectively. For this reason, each core segment 9 can be sequentially arranged around the core while being guided by the first dovetail joint 16. In addition, since the first and second dovetail joints 16 and 17 are engaged with each other, positional displacement of the core segment 9 is prevented, and assembly can be performed with high accuracy and stability.
- the rigid core 1 includes a connecting means 23 having a ball lock mechanism that detachably attaches the side plate 6U on the other side in the axial direction and the end on the other side of the core 5.
- a rigid core 1 enables the other side plate 6U to be attached to the core 5 in a detachable manner with one touch without using bolts. For this reason, such a rigid core 1 can greatly increase the assembly work efficiency and the disassembly work efficiency, and greatly contribute to the automation of the assembly and disassembly.
- the core body 3 is held between the side plates 6U and 6L, and the movement of the core segments 9 in the axial direction is prevented. Accordingly, the engagement between the first and second dovetail joint portions 16 and 17, the movement of the core segment 9 in the radial direction by the core 5, and the holding between the side plates 6 ⁇ / b> L and 6 ⁇ / b> U are prevented.
- the assembled core segments 9 and 9 are fixed by preventing the child segments 9 from moving in the axial direction. Thereby, the core main body 3 is maintained with high accuracy.
- the ball lock mechanism variation in the distance between the side plates 6U and 6L due to assembly can be prevented, and the rigid core 1 can be assembled with higher accuracy and stability.
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- Engineering & Computer Science (AREA)
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Abstract
Description
タイヤ周方向に分割されかつ半径方向内側に移動可能な複数の中子セグメントからなる前記中子本体と、
前記中子本体の中心孔に内挿されて各中子セグメントの半径方向内側への移動を阻止する円筒状のコアと、
前記中子本体の軸心方向両側に配され、内側面間で前記中子本体を挟んで保持することにより各中子セグメントの軸心方向への移動を阻止する一対の側板とを具え、
しかも前記コアの外周面に、軸心方向にのびる蟻溝又は蟻ほぞの一方からなる第1の蟻継ぎ部が形成され、かつ各中子セグメントの内周面に、軸心方向にのびかつ前記第1の蟻継ぎ部に係合する蟻溝又は蟻ほぞの他方からなる第2の蟻継ぎ部が形成されるとともに、
軸心方向一方側の側板は、前記コアの一方側の端部が固定され、かつ軸心方向他方側の側板と前記コアの他方側の端部とは、ボールロック機構を有する連結手段により着脱自在としたことを特徴としている。
前記ボールロック手段は、
前記連結筒部に周方向に分散配置されかつ半径方向内外に貫通する複数の貫通孔に保持される剛性ボールと、
前記連結筒部内に配されかつ軸心方向外側に移動することにより各前記剛性ボールを半径方向外側に押し上げ、各剛性ボールを前記コアの中心孔に設ける周溝に押し付けてロックさせるプランジャと、
該プランジャを軸心方向外側に付勢する付勢バネと、
該プランジャを軸心方向内側に移動させ、前記剛性ボールの半径方向外側への押し上げを解除させることにより前記コアと連結筒部との間のロックを解除させる解除棒とを具えることを特徴としている。
図1に示すように、本実施形態の剛性中子1は、円環状の中子本体3を具える。この中子本体3は、空気入りタイヤTの内腔面Tsを成形する成形面2をその外表面に設けられる。そして、この中子本体3の前記成形面2上に、タイヤ構成部材が順次貼り付けられ、未加硫タイヤが形成される。タイヤ構成部材とは、例えば、インナーライナ、カーカスプライ、ベルトプライ、サイドウォールゴム、トレッドゴム等を含む。未加硫タイヤが形成された後、該未加硫タイヤが、剛性中子1ごと加硫金型内に投入され、空気入りタイヤTが加硫成形される。図1には、前記剛性中子1が、加硫済みの空気入りタイヤTとともに加硫金型から取り出され、保持軸4上に移載された状態が示される。
支持軸部21と連結筒部22とが同心に設けられる。支持軸部21は、側板本体20の外側面から軸心方向外側に突出する。連結筒部22は、内側面から軸心方向内側に突出しかつ前記コア5の中心孔5Hに挿入される。
図1は、加硫金型から取り出された空気入りタイヤ付きの剛性中子1が、下の保持軸4上に移載された状態を示す。そして、図7(A)、(B)に示すように、上方から上の保持軸35が下降し、この保持軸35とその下方に位置する側板6Uの支持軸部21とが前記中子連結手段36を用いてワンタッチで連結する。しかる後、前記保持軸35に設けた操作バー35Aが操作され、前記連結手段23の解除棒28が押し込まれる。このため、前記プランジャ26が軸心方向内側移動し、コア5と連結筒部22との間のロックが解除する。これにより、剛性中子1から一方側の側板6Uが取り外されうる。なお前記操作バー35Aによる操作は、手動及びシリンダなどによる遠隔操作など適宜の手段で行いうる。又取り外された側板6Uは、中子連結手段36に保持されたまま前記保持軸35とともに他所に移送される。
2 成形面
3 中子本体
3H 中心孔
5 コア
5H 中心孔
5Ha 周溝
6L、6U 側板
9 中子セグメント
9A 第1の中子セグメント
9B 第2の中子セグメント
9S 分割面
14 蟻溝
15 蟻ほぞ
16 第1の蟻継ぎ部
17 第2の蟻継ぎ部
12 支持軸部
21 支持軸部
22 連結筒部
23 連結手段
24 ボールロック手段
25 剛性ボール
26 プランジャ
27 付勢バネ
28 解除棒
30 貫通孔
T 空気入りタイヤ
Ts 内腔面
Claims (4)
- 空気入りタイヤの内腔面を成形する成形面を外表面に設けた円環状の中子本体を具える剛性中子であって、
タイヤ周方向に分割されかつ半径方向内側に移動可能な複数の中子セグメントからなる前記中子本体と、
前記中子本体の中心孔に内挿されて各中子セグメントの半径方向内側への移動を阻止する円筒状のコアと、
前記中子本体の軸心方向両側に配され、内側面間で前記中子本体を挟んで保持することにより各中子セグメントの軸心方向への移動を阻止する一対の側板とを具え、
しかも前記コアの外周面に、軸心方向にのびる蟻溝又は蟻ほぞの一方からなる第1の蟻継ぎ部が形成され、かつ各中子セグメントの内周面に、軸心方向にのびかつ前記第1の蟻継ぎ部に係合する蟻溝又は蟻ほぞの他方からなる第2の蟻継ぎ部が形成されるとともに、
軸心方向一方側の側板は、前記コアの一方側の端部が固定され、かつ軸心方向他方側の側板と前記コアの他方側の端部とは、ボールロック機構を有する連結手段により着脱自在としたことを特徴とする剛性中子。 - 前記連結手段は、前記他方側の側板の内側面に突設されかつ前記コアの中心孔に挿入される連結筒部、および前記コアと連結筒部との間をロックするボールロック手段を具えるとともに、
前記ボールロック手段は、
前記連結筒部に周方向に分散配置されかつ半径方向内外に貫通する複数の貫通孔に保持される剛性ボールと、
前記連結筒部内に配されかつ軸心方向外側に移動することにより各前記剛性ボールを半径方向外側に押し上げ、各剛性ボールを前記コアの中心孔に設ける周溝に押し付けてロックさせるプランジャと、
該プランジャを軸心方向外側に付勢する付勢バネと、
該プランジャを軸心方向内側に移動させ、前記剛性ボールの半径方向外側への押し上げを解除させることにより前記コアと連結筒部との間のロックを解除させる解除棒とを具えることを特徴とする請求項1記載の剛性中子。 - 前記中子セグメントは、周方向巾が大、かつ周方向両端の分割面を、半径方向内方に向かって周方向巾が減じる向きに傾斜させた第1の中子セグメントと、前記第1の中子セグメントとは周方向に交互に配され、しかも周方向巾が小、かつ周方向両端の分割面を、半径方向内方に向かって周方向巾が増す向きに傾斜させた第2の中子セグメントとから構成されることにより、半径方向内側に移動可能としたことを特徴とする請求項1又は2記載の剛性中子。
- 前記軸心方向一方側、他方側の側板は、それぞれ軸心方向外側に突出する支持軸部を具えることを特徴とする請求項1~3の何れかに記載の剛性中子。
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CN115824204B (zh) * | 2022-12-16 | 2023-09-01 | 上海立羽勘测有限公司 | 一种管线陀螺仪 |
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CN103635308A (zh) | 2014-03-12 |
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