JP2004034428A - Method for holding pneumatic tire and apparatus therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To keep the concentricity and parallelism of one and other side rims 20 and 30 with high accuracy over a long period of time while dispensing with inspection and adjusting works. <P>SOLUTION: The mutual joining of one and other side rims 20 and 30 are performed by the surface contact of the other side surface 44a of an inside locking pawl 44 and one side surface 41a of an outside locking pawl 41 but, since these other side surface 44a and one side surface 41a are together constituted of a part of a conical surface having the same gradient, the position and posture of the freely displaceable other side rim 30 are corrected on the basis of the immovable one side rim 20 by the correction action of the conical surface. By this constitution, both rims 30 and 20 can keep highly accurate concentricity and parallelism over a long period of time. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method and a device for holding a pneumatic tire in which a bead portion of the pneumatic tire is held from one side and the other side rim from both sides.
[0002]
[Prior art]
2. Description of the Related Art As a conventional pneumatic tire holding device, for example, a device described in JP-A-9-174573, which is used for a post-cure inflator, is known. The upper rim on which the upper bead portion of the pneumatic tire can be seated, the lower rim on which the lower bead portion of the pneumatic tire can be seated, and the lower rim approaching the upper rim. Lifting means for seating the upper and lower bead portions of the pneumatic tire on the rim, and a plurality of outer locking claws provided on an outer periphery of a lower end of a lock shaft constituting a part of the upper rim and separated in a circumferential direction. A plurality of inner locking claws formed on the inner periphery of an insertion hole coaxial with a lock shaft formed on the upper surface of the other side rim and spaced apart in the circumferential direction; Both lower surfaces are located on a plane perpendicular to the axis of the lock shaft.
[0003]
When the pneumatic tire is held by using such a holding device, first, the lower rim is approached to the upper rim by the lifting / lowering means, and the upper bead portion of the pneumatic tire is brought into contact with the upper rim. After the lower bead portions of the pneumatic tires are seated on the lock shaft, the lock shaft is rotated by a predetermined angle around the axis. Next, by filling the pneumatic tire with internal pressure and bringing the outer and inner locking claws into surface contact with each other, the upper and lower rims are connected to each other. They are held from both sides.
[0004]
[Problems to be solved by the invention]
However, in such a conventional method and apparatus for holding a pneumatic tire, as described above, the upper and lower surfaces of the outer and inner locking claws are both located on a plane perpendicular to the axis of the lock shaft. Therefore, the concentricity and parallelism of the upper and lower rims are determined by the positions and postures of the upper and lower rims when the outer and inner locking claws are in surface contact. In addition, the accuracy of assembling of the entire post-cure inflator is deteriorated due to long-time use, so that the post-cured inflator gradually deviates from the normal position and posture.
[0005]
Then, when the position and posture are out of order and the lower rim holds the pneumatic tire immediately after vulcanization and tries to adjust the shape while cooling, the shape of the pneumatic tire deviates from the normal shape There is a problem that tire uniformity is reduced.
[0006]
In order to solve such problems, it is conceivable to periodically inspect the assembly accuracy (concentricity and parallelism of the upper and lower rims) of the post cure inflator and adjust as necessary. In such a case, a lot of labor and time are required for the inspection and adjustment work, and the post cure inflator must be stopped during the work, which results in a problem that the work efficiency is reduced. is there.
[0007]
An object of the present invention is to provide a method and an apparatus for holding a pneumatic tire that can maintain the concentricity and parallelism of one side and the other side rims with high accuracy for a long period of time without requiring inspection and adjustment work. And
[0008]
[Means for Solving the Problems]
Such an object is achieved, firstly, by moving the one side rim and the other side rim relatively closer to each other by moving means, and connecting one bead portion of the pneumatic tire to the one side rim and the pneumatic tire to the other side rim. A step of seating the other bead portion, and a side surface of one side locking member provided on one side rim and formed of a part of a conical surface and one side of the one side locking member provided on the other side rim. The side surface is brought into surface contact with the other side surface of the other-side locking body, which is a part of a conical surface having the same gradient, whereby the one side and the other side rim are connected to each other, and the pneumatic tire is connected to the one side, Holding the pneumatic tire from both sides by the other side rim.
[0009]
Second, one side rim on which one bead part of the pneumatic tire can be seated, another side rim on which the other bead part of the pneumatic tire can be seated, and one side rim and the other side rim are relatively positioned. A moving means for approaching, one side of the pneumatic tire on the other side rim, and the other bead portion on the other side rim, a one side locking body provided on the one side rim, and provided on the other side rim, When the other side is provided with another side locking body that can be in surface contact with one side of the one side locking body, one side of the pneumatic tire, the other bead part is seated on one side, the other side rim, respectively, The one side and the other side rims are connected to each other by bringing one side of the one side locking body into contact with the other side of the other side locking body, and the pneumatic tire is connected to both sides by the one side and the other side rim. In the pneumatic tire holding device which is held from one side, one side and one side of the one side locking body are provided. Other aspects of the fine other side latching member can be achieved by holding devices of the pneumatic tire configured from a part of the conical surface of the same slope.
[0010]
One side of the pneumatic tire is seated on one side and the other side rim, and the other side is provided on the other side rim, after one side of the pneumatic tire is seated on the other side rim. The pneumatic tire was held from both sides by surface contact with the other side surface of the locking body, but as described above, one side that makes surface contact, one side of the other side locking body, and the other side surface together. Since it is composed of a part of the conical surface having the same gradient, when either one of the rims on the one side or the other side is used as a reference, the other rim or the other rim on the other side is in conformity with the reference by the correcting action of the conical surface. The position and posture are corrected to match the rim.
[0011]
As a result, even if the positions and postures of the rims on one side and the other side become incorrect after prolonged use, the positions and postures of the remaining rims automatically follow the reference rim position and posture as described above. However, these one-side and other-side rims can maintain high-precision concentricity and parallelism over a long period of time. In addition, such inspection and adjustment work for achieving high concentricity and parallelism is not required, and work efficiency is improved.
[0012]
According to the third aspect of the present invention, one side surface of the one side locking member (outer side locking claw) and the other side surface of the other side locking member (inner side locking claw) have a simple structure. Can be surely brought into surface contact.
Further, according to the configuration described in claim 4, any posture change of the other side rim can be allowed while maintaining the connection between the other side rim and the movable base.
[0013]
Further, according to the configuration described in claim 5, even when the position of the other rim changes, the connection between the other rim and the movable base can be reliably maintained.
The present invention is preferably applied to a post cure inflator as described in claim 6.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In FIGS. 1, 2, and 3, reference numeral 11 denotes a post-cure inflator that cools and shapes the pneumatic tire T immediately after vulcanization while holding the pneumatic tire T. The post-cure inflator 11 includes a plurality of post-cure inflators 11 standing on a floor surface. The fixed frame 12 includes a vertical portion 12a and a horizontal portion 12b connecting the upper ends of the vertical portions 12a. A pedestal 14 is fixed to the lower surface of the horizontal portion 12b, and a substantially disk-shaped horizontal rim body 15 on which an upper (one) bead portion B of the pneumatic tire T can be seated is mounted on the lower surface of the pedestal 14. Has been fixed.
[0015]
Reference numeral 18 denotes a lock shaft that penetrates the center of the pedestal 14 and the rim body 15 and extends in the vertical direction. A flange 19 whose lower surface is in sliding contact with the pedestal 14 is formed at the upper end of the lock shaft 18, and as a result, The lock shaft 18 is rotatably supported by the pedestal 14 and the rim body 15 while being prevented from falling off by the pedestal 14. The above-described rim main body 15 and lock shaft 18 as a whole constitute a one-side rim 20 on which the upper (one) bead portion B of the pneumatic tire T can be seated.
[0016]
A guide rail 23 extending vertically is laid on the vertical portion 12a, and a slide bearing 22 attached to the vertical portion 24a of an L-shaped elevating body 24 is slidably engaged with the guide rail 23. I have. The tip of the horizontal portion 24b of the elevating body 24 extends directly below the one side rim 20, and a spherical receiver 25 is placed on the upper surface of the tip. 26 are formed. Here, the bottom surface of the recess 26 is a contact surface 26a with the other side rim described later, and the contact surface 26a is formed of a part of a spherical surface whose center of curvature is located on the rotation axis of the lock shaft 18. ing. The elevating body 24 and the spherical receiver 25 constitute a movable base 27 to which the other rim described later is connected as a whole.
[0017]
Reference numeral 30 denotes another side rim which is installed directly below (the other side) of the one side rim 20 and is coaxial with the one side rim 20. The other side rim 30 has a lower (other) bead on the lower side of the pneumatic tire T. The part B can be seated. The lower surface of the other side rim 30 is provided with a contact surface 30a constituted by a part of a spherical surface having the same radius of curvature as the contact surface 26a. 26a is in surface contact. As a result, the posture (the inclination with respect to the horizontal direction) of the other rim 30 can be freely changed within a certain range while being supported by the spherical receiver 25.
[0018]
Reference numeral 33 denotes a plurality of loose fitting holes formed in the movable base 27, specifically, the tip end of the horizontal portion 24b and the spherical support 25. These loose fitting holes 33 extend in the vertical direction, and It penetrates the receiver 25. Numeral 34 denotes a plurality of bolts each having a central portion loosely fitted in the loose fitting hole 33 of the movable base 27, and a screw portion 34 a formed at the tip (upper end) of the bolt 34 is attached to the other side rim 30. On the other hand, the head 34b formed at the base end (lower end) is slightly separated from the lower surface of the horizontal portion 24b.
[0019]
As a result, the other side rim 30 is connected to the movable base 27 by the plurality of bolts 34, but the bolts 34 connecting the other side rim 30 and the movable base 27 are loosely inserted into the play fitting holes 33 of the movable base 27. As described above, when the other rim 30 changes its posture as described above, the bolt 34 inclines in the loose fitting hole 33 to allow the posture of the other rim 30 to be changed. When the rim 30 slides on the elevating body 24 together with the spherical receiver 25 and moves in the horizontal direction, the bolt 34 is displaced in the loose fitting hole 33 to allow a certain degree of position change (movement) of the other rim 30. You.
[0020]
In this manner, the connection between the movable base 27 and the other side rim 30 is performed by a plurality of bolts 34 whose distal ends are screwed into the other side rim 30 and the central part of the movable base 27 is loosely fitted. Even when the position of the side rim 30 changes, the connection between the other rim 30 and the movable base 27 can be reliably maintained. Further, as described above, if the contact surfaces 26a and 30a between the movable base 27 and the other rim 30 are both formed from a part of a spherical surface having the same radius of curvature, the connection between the other rim 30 and the movable base 27 is maintained. However, any posture change of the other side rim 30 can be allowed. As a result, the one rim 20 is stationary and immobile except for the rotation of the lock shaft 18, but the other rim 30 can be freely displaced within a certain range.
[0021]
Reference numeral 37 denotes a vertically extending / lowering cylinder connected to the vertical portion 12a of the fixed frame 12 located above the guide rail 23. The tip of a piston rod 38 of the vertical cylinder 37 is connected to the lifting / lowering body 24. . As a result, when the lifting / lowering cylinder 37 is operated and the piston rod 38 is retracted or protrudes, the movable table 27 moves up and down together with the other rim 30 and approaches and separates from the one rim 20. The guide rail 23, the movable base 27, and the elevating cylinder 37 as a whole make the one-side rim 20 and the other-side rim 30 relatively approach to each other, and the pneumatic tire T On the other hand, a moving means 39 for seating the other bead portion B is constituted.
[0022]
The other end (lower end) of the lock shaft 18 has one end and a diameter smaller than that of the center portion. A plurality of outer locking claws 41 as a body are formed integrally, and these outer locking claws 41 extend radially outward and are arranged equidistantly in the circumferential direction. One side surface (upper surface) 41a of these outer locking claws 41 is formed of a part of a conical surface which is coaxial with the lock shaft 18 and tapers upward.
[0023]
On the other hand, an insertion hole 43 coaxial with the lock shaft 18 is formed on one side surface (upper surface) of the other side rim 30, and provided on the other side rim 30 at an inner periphery of an opening (upper end) of the insertion hole 43. The same number of the inner locking claws 44 as the outer locking claws 41 are formed. The inner locking claws 44 extend inward in the radial direction, and their plane shapes are substantially the same as the plane shapes between the adjacent outer locking claws 41, and are arranged at equal distances in the circumferential direction. The other side surface (lower surface) 44a of the inner locking claw 44 is formed by a part of a conical surface tapering upward, but the gradient thereof is the same as that of the one side surface 41a. One side surface 41a of the outer locking claw 41 and the other side surface 44a of the inner locking claw 44 can make surface contact.
[0024]
Reference numeral 47 denotes a cylinder as horizontal rotating means supported on the lower surface of the horizontal portion 12b of the fixed frame 12, and a distal end of a piston rod 48 of the cylinder 47 has a base end fixed to the flange 19 of the lock shaft 18. It is connected to the tip of the arm 49. The other end of the lock shaft 18 is inserted into the insertion hole 43 until the outer locking pawl 41 passes between the inner locking claws 44 and escapes to the other side (lower side) due to the rise of the movable base 27. Then, the cylinder 47 is operated to rotate the lock shaft 18 to a position where the inner locking claw 44 and the outer locking claw 41 are vertically overlapped with each other, and then the air is passed through a passage (not shown) formed in the one side rim 20. When the tire T is filled with the internal pressure, the other side rim 30 and the movable table 27 are pushed down by the internal pressure so that the other side surface 44a of the inner locking claw 44 and one side surface 41a of the outer locking claw 41 come into surface contact (contact). Then, the one side rim 20 and the other side rim 30 are connected.
[0025]
As described above, the outer locking pawl 41 formed on the lock shaft 18 constituting the one rim 20 and the inner locking claw 44 formed on the insertion hole 43 of the other rim 30 constitute a bayonet joint. By rotating the lock shaft 18, the inner locking claw 44 and the outer locking claw 41 are overlapped with each other, and thereafter, the pneumatic tire T is filled with the internal pressure, and the inner locking claw 44 and the outer locking claw 41 are filled. If they are brought into surface contact (contact), one side 41a of the outer locking claw 41 and the other side 44a of the inner locking claw 44 can be reliably brought into surface contact with a simple structure. .
[0026]
Next, the operation of the embodiment of the present invention will be described.
Now, it is assumed that the movable table 27 is waiting at the lower limit because the piston rod 38 of the lifting cylinder 37 projects. Next, the vulcanized pneumatic tire T immediately after being vulcanized by the vulcanizing device is carried into the post-cure inflator 11 and placed horizontally on the other side rim 30. At this time, the other (lower) bead portion B of the pneumatic tire T is seated on the other rim 30. Next, when the lifting / lowering cylinder 37 is operated to retract the piston rod 38, the movable table 27, the other side rim 30, and the pneumatic tire T move (up) to one side while being guided by the guide rail 23, and move to the one side rim. Approach 20.
[0027]
During this approach, the other end (lower end) of the lock shaft 18 is inserted into the insertion hole 43. At this time, since the outer locking claws 41 pass between the adjacent inner locking claws 44, respectively, The locking claw 41 and the inner locking claw 44 do not interfere with each other. When the other rim 30 is raised to the upper limit, the upper bead portion B of the pneumatic tire T is seated on the one rim 20, whereby both the bead portions B of the pneumatic tire T are connected to one side and the other rim. At this time, the outer locking claws 41 pass between the inner locking claws 44 and escape to the other side (lower side).
[0028]
Next, when the cylinder 47 is operated to project the piston rod 48, the lock shaft 18 and the outer locking claw 41 rotate by a predetermined angle, and the inner locking claw 44 and the outer locking claw 41 are vertically overlapped. Next, when the pneumatic tire T is filled with the internal pressure through the passage formed in the one side rim 20, the other side rim 30 and the movable base 27 are pushed down by the internal pressure, and the other side surface 44a of the inner locking claw 44 and the outer engagement 44 are engaged. The one side surface 41a of the pawl 41 comes into surface contact (contact), whereby the one side rim 20 and the other side rim 30 are connected, and the vulcanized pneumatic tire T is mounted on the one side and the other side rim 20. , 30 from both sides.
[0029]
At this time, since the other side surface 44a of the inner locking claw 44 and the one side surface 41a of the outer locking claw 41 which are in surface contact as described above are both formed as a part of a conical surface having the same gradient, the conical surface is corrected. The position and posture of the other rim 30 that is free to be displaced with respect to the one rim 20 that is immobile due to the action are corrected to match the one rim 20. At this time, the position and posture of the other side rim 30 are corrected by making the other side rim 30 and the spherical surface receiver 25 come into spherical contact, and the bolt 34 screwed into the other side rim 30 is inserted into the loose fitting hole 33 of the movable base 27. It is allowed to be loosely fitted to
[0030]
As a result, even if the positions and postures of the first and second rims 20 and 30 are deviated due to long-term use of the post-cure inflator 11, the position and posture of the one-side rim 20 as a reference are on the driven side. Since the position and orientation of the other side rim 30 always automatically follow and match, the one side and the other side rims 20 and 30 can maintain high-precision concentricity and parallelism for a long period of time. In addition, such inspection and adjustment work for achieving high concentricity and parallelism is not required, and work efficiency is improved.
[0031]
As described above, the pneumatic tire T is left for a predetermined time while being held from one side and the other rims 20 and 30 from both sides, and the vulcanized pneumatic tire T is cooled and the shape of the pneumatic tire T is reduced. Arrange. Then, after the connection between the one side rim 20 and the other side rim 30 is released by the operation reverse to the above, the movable table 27 is lowered to the lower limit, and the pneumatic tire T on the other side rim 30 moves to the next step. Is carried out.
[0032]
In the above-described embodiment, the one side rim 20 is stopped and the other side rim 30 is raised to make the one side and the other side rims 20 and 30 relatively close to each other. Alternatively, the other rim may be relatively approached by stopping the other rim and moving the one rim. Further, in the above-described embodiment, the one side and the other side rims 20 and 30 are arranged vertically apart, but in the present invention, they may be arranged laterally (horizontally) apart.
[0033]
Further, in the above-described embodiment, the position and posture of the displaceable other rim 30 are made to follow the one rim 20 with reference to the immovable one rim 20. In the present invention, the other rim 20 is used. The rim may be made to follow the other rim. Also, in the present invention, similarly to the above-mentioned Japanese Patent Application Laid-Open No. 9-174573, a plurality (two) of rims on one side and the other side are installed at equal angles around the horizontal rotation axis, for example, at 180 degrees. Alternatively, the tire replacement operation may be performed on the lower side of the rotating shaft, and the cooling operation may be performed on the upper side at the same time, and the rotating shaft may be rotated half a turn when both operations are completed.
[0034]
Further, in the present invention, a plurality of other rims are installed on a horizontal turntable at a predetermined angle in the circumferential direction, and the vulcanized tire and one rim are transferred to the other rim at the replacement position, and one side, While the vulcanized tire is held by the other side rim, the vulcanized tire held on one side and the other side rim is cooled at the cooling position, and when both operations are completed, the turntable is rotated by a predetermined angle. It may be.
[0035]
【The invention's effect】
As described above, according to the present invention, the concentricity and the parallelism of the one side rim and the other side rim can be maintained with high accuracy for a long period of time without requiring inspection and adjustment work.
[Brief description of the drawings]
FIG. 1 is a partially cutaway front view showing an embodiment of the present invention.
FIG. 2 is a front sectional view of the vicinity of one-side and other-side locking bodies.
FIG. 3 is a sectional view taken along the line II of FIG. 2;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 ... Post cure inflator 15 ... Rim body 18 ... Lock shaft 20 ... One rim 26a ... Contact surface 27 ... Movable table 30 ... Other rim 30a ... Contact surface 34 ... Bolt 39 ... Moving means 41 ... One side locking body 41a ... One side surface 43 ... Insertion hole 44 ... Other side locking body 44a ... Other side surface T ... Pneumatic tire

Claims (6)

Making the one side rim and the other side rim relatively approach by the moving means, and seating one bead part of the pneumatic tire on the one side rim and the other bead part of the pneumatic tire on the other side rim, respectively; A side surface of the one-side locking member provided on the one-side rim and formed of a part of a conical surface, and a part of a conical surface provided on the other side rim and having the same gradient as one side surface of the one-side locking member A surface contact with the other side surface of the other side locking body consisting of, thereby connecting these one side, the other side rims, and holding the pneumatic tire from both sides by these one side, the other side rim; and A method for holding a pneumatic tire, comprising: The one side rim on which one bead part of the pneumatic tire can be seated, the other side rim on which the other bead part of the pneumatic tire can be seated, and the one side rim and the other side rim are relatively close to each other. One side of the pneumatic tire and the other side of the pneumatic tire are seated on the other side rim, the one side rim provided on the one side rim, and the other side face provided on the other side rim. One side of the pneumatic tire is provided with one side and the other bead portion on one side and the other side rim, respectively. By bringing one side of the body into contact with the other side of the other side locking body, the one side and the other side rims are connected to each other so that the pneumatic tire is held from both sides by the one side and the other side rim. In the holding device for a pneumatic tire, the one side and the other side of the one side locking body are provided. Holding device of a pneumatic tire characterized by being configured other side of the stop member from a portion of the conical surface of the same slope. The one-side rim includes a rim main body and a lock shaft rotatably supported by the rim main body, and the one-side locking body is circumferentially separated from the outer periphery of the other end of the lock shaft. A plurality of outer locking claws provided, while the other locking body is formed on an inner circumference of an insertion hole coaxial with a lock shaft formed on one end surface of the other rim, and is formed in a circumferential direction. A plurality of inner locking claws separated from each other, and the surface contact between the outer locking claw and the inner locking claw is maintained at the other end of the lock shaft until the outer locking claw comes out to the other side of the inner locking claw. After inserting the lock shaft into the insertion hole, rotate the lock shaft until the outer and inner locking claws overlap, then fill the pneumatic tire with the internal pressure and bring the outer and inner locking claws into contact with each other. The holding device for a pneumatic tire according to claim 2. 4. The contact surface according to claim 2, wherein when the moving means has a movable base connected to the other rim, the contact surface between the movable base and the other rim is formed of a part of a spherical surface having the same radius of curvature. Pneumatic tire holding device. 5. The pneumatic tire holding device according to claim 4, wherein the connection between the movable base and the other side rim is performed by a plurality of bolts whose distal ends are screwed into the other side rim and whose central part is loosely fitted to the movable base. apparatus. 3. The pneumatic tire holding device according to claim 2, wherein the device is applied to a post-cure inflator for adjusting a shape while cooling a vulcanized tire.

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