JPWO2018131087A1 - Tire holding device - Google Patents

Abstract

  The tire holding device (10) includes a lower rim (20) that can support one side in the width direction (Dw) of the tire (TR) and an upper that can support the other side in the width direction (Dw) of the tire (TR). A rim (30), a drive shaft (42) attached to the upper rim (30), and a cylinder (41) for advancing and retracting the drive shaft (42) with fluid pressure; A tire gripping portion (40) for gripping the tire (TR) in proximity to and away from the rim (20), and a holding shaft (50) provided on the upper rim (30) and projecting toward the lower rim (20) ) And a fitting portion (60) having a concave portion that is provided on the lower rim (20) and detachably fits the holding shaft (50).

Description

  The present invention relates to a tire holding device.

  Some tires used in vehicles such as passenger cars, trucks, and buses are manufactured by being vulcanized under high temperature and high pressure in a tire vulcanizer. In the tire manufacturing process in which vulcanization is performed, the vulcanized tire is carried into the cooling device from the tire vulcanizer, cooled in the cooling device, and carried out.

  As such a cooling device, Patent Literature 1 discloses a cooling device including a tire holding device that attaches and holds an upper rim and a lower rim to a loaded tire.

US Pat. No. 7,740,464

The tire holding device as described in Patent Document 1 holds the distance between the upper rim and the lower rim by the rod of the hydraulic cylinder in accordance with the tire width. However, due to use over time, there is a risk that the inner and outer rims will be misaligned, the internal leakage of the cylinder will be caused by packing deterioration, etc., and the quality of the manufactured tire will deteriorate.
Accordingly, an object of the present invention is to provide a tire holding device that can maintain the quality of a tire even under long-term use.

  The tire holding device according to the first aspect includes a first rim capable of supporting one side of the tire in the width direction, a second rim capable of supporting the other side of the tire in the width direction, and the second rim. A tire that grips the tire by bringing the second rim closer to and away from the first rim, and a drive shaft attached to the rim and a cylinder that moves the drive shaft forward and backward with fluid pressure A gripping part, a holding shaft provided on one rim of the first rim and the second rim and projecting toward the other rim, and provided on the other rim, the holding shaft being detachable And a fitting portion having a concave portion to be fitted to.

  According to this aspect, when the tire holding device holds the tire between the upper rim and the lower rim, the tire holding device fits the concave portion of the fitting portion with the holding shaft. Therefore, it is possible to secure the mechanical concentricity of the upper and lower rims. Therefore, even under long-term use, the tire holding device can suppress the concentricity defect of the held tire and maintain the tire quality.

  In the tire holding device according to the second aspect, the holding shaft has a shape extending along the axis of the drive shaft, the fitting portion protrudes toward the one rim, and extends along the axis. It is a tire holding device of the 1st mode provided with the cylinder part which has the inner peripheral surface extended, and the inner peripheral surface defines the crevice.

  According to this aspect, since the tire holding device fits the holding shaft and the concave portion defined by the cylinder inner peripheral surface, the tire gripping portion approaches the second rim in the axial direction with respect to the first rim. By doing so, the holding shaft and the cylindrical portion can be fitted.

  The tire holding device according to the third aspect is the tire holding device according to the first or second aspect, further including a restricting portion capable of restricting movement of the second rim in the axial direction.

  According to this aspect, since the tire holding device can restrict the movement of the second rim in the axial direction, the rim width from the set value can be obtained even if internal leakage of the cylinder due to aged use due to packing deterioration or the like occurs. Can be suppressed. Therefore, even under long-term use, the tire holding device can guarantee the rim position holding accuracy and maintain the tire quality.

  A tire holding device according to a fourth aspect includes a first rim capable of supporting one side of the tire in the width direction, a second rim capable of supporting the other side of the tire in the width direction, and the second rim. A tire that grips the tire by bringing the second rim closer to and away from the first rim, and a drive shaft attached to the rim and a cylinder that moves the drive shaft forward and backward with fluid pressure A grip portion and a restriction portion capable of restricting movement of the second rim in the axial direction.

  According to this aspect, since the tire holding device can restrict the movement of the second rim in the axial direction, the rim width from the set value can be obtained even if internal leakage of the cylinder due to aged use due to packing deterioration or the like occurs. Can be suppressed. Therefore, even under long-term use, the tire holding device can guarantee the rim position holding accuracy and maintain the tire quality.

  The tire holding device according to a fifth aspect is the tire holding device according to the fourth aspect, in which the restricting portion sandwiches an outer periphery of the drive shaft and restricts movement of the drive shaft in the axial direction.

  According to this aspect, since the restricting portion sandwiches the outer periphery of the drive shaft, the space around the drive shaft can be used effectively.

  According to one aspect of the tire holding device of the present invention, the tire holding device can maintain the quality of the tire even under long-term use.

1 is an overall view of a tire holding device in a first embodiment according to the present invention. It is an enlarged view of the holding shaft and fitting part periphery (at the time of separation) of FIG. It is an enlarged view of the holding shaft and the fitting part periphery (at the time of proximity | contact) of FIG. It is sectional drawing of the control part (at the time of releasing) in 1st embodiment which concerns on this invention. It is the VV sectional view taken on the line of FIG. It is sectional drawing of the control part (at the time of control) in 1st embodiment which concerns on this invention. It is the VII-VII sectional view taken on the line of FIG. It is an enlarged view of the holding shaft and fitting part periphery (at the time of separation | spacing) in 2nd embodiment which concerns on this invention. It is an enlarged view of the holding shaft and fitting part periphery (at the time of separation | spacing) in 3rd embodiment which concerns on this invention. It is a figure which shows the holding shaft and fitting part periphery (at the time of separation) in 4th embodiment which concerns on this invention. It is an enlarged view of a holding shaft and fitting part periphery (at the time of separation) in a fifth embodiment concerning the present invention. It is sectional drawing of the control part (at the time of releasing) in 6th embodiment which concerns on this invention. It is sectional drawing of the control part (at the time of control) in 6th embodiment which concerns on this invention. It is a general view of the tire holding device in the seventh embodiment according to the present invention. It is a general view of the tire holding device in the eighth embodiment according to the present invention.

  Hereinafter, various embodiments according to the present invention will be described with reference to the drawings.

<First embodiment>
1st Embodiment which concerns on this invention is described with reference to FIGS.

(overall structure)
The overall configuration of the tire cooling device 1 will be described.
As shown in FIG. 1, the tire cooling device 1 includes a tire holding device 10.
The tire cooling device 1 cools the tire TR, which has been vulcanized under high temperature and high pressure in the previous step, with the tire holding device 10 while the tire TR is filled with compressed air. The tire cooling device 1 cools the tire TR by natural air cooling of the tire TR held by the tire holding device 10. In other words, in the present embodiment, the tire TR held by the tire holding device 10 is naturally air-cooled. In other words, the tire holding device 10 of this embodiment functions as the tire cooling device 1 as it is.

  As shown in FIG. 1, the tire holding device 10 includes a lower rim 20 (first rim) that supports the lower side of the tire TR, and an upper rim 30 (second rim) that supports the upper side of the tire TR. A tire gripping part 40, a holding shaft 50, a fitting part 60, and a restricting part 70 are provided. The tire holding device 10 sandwiches the tire TR between the lower rim 20 and the upper rim 30 from both sides in the width direction Dw.

The tire holding device 10 further includes an air supply pipe 92, a base portion 93, a support column 94, and a frame 95.
The frame 95 is fixed on the base portion 93 via a support post 94 and supports the tire gripping portion 40.
A lower rim 20 is disposed on the base 93.

Compressed air is sent from the compressor COM1 of the factory equipment into the tire TR disposed between the lower rim 20 and the upper rim 30. The compressed air is sent into the inside of the tire TR from the peripheral position of the axis Ax of the lower rim 20 through the air supply pipe 92, the through hole 93a of the base 93, and the through hole 20a of the lower rim 20. Thus, the tire holding device 10 is configured such that compressed air is filled into the tire TR while being sandwiched between the lower rim 20 and the upper rim 30.
In FIG. 1, the tire TR, the lower rim 20, the fitting portion 60, and the base portion 93 are parallel to the axis Ax of the drive shaft 42 and are shown in a cross-sectional view including the axis.

Hereinafter, the detailed structure of each part of the tire cooling device 1 will be described.
(Tire gripping part)
The tire gripping portion 40 has a drive shaft 42 and a cylinder 41. The tire gripping portion 40 grips the tire TR by moving the upper rim 30 along the axis Ax from the separated position to a position close to the lower rim 20.
The drive shaft 42 has a cylindrical shape extending along the axis Ax. An upper rim 30 is attached to the lower end of the drive shaft 42.
The cylinder 41 advances and retracts the drive shaft 42 in the axial direction Da with fluid pressure. In the present embodiment, the drive shaft 42 is advanced and retracted by hydraulic pressure.

  In the following description, unless otherwise stated, the direction in which the axis Ax of the drive shaft 42 extends is simply “axial direction Da”, the circumferential direction of the drive shaft 42 is simply “circumferential direction Dc”, and the drive shaft 42 The radial direction is simply referred to as “radial direction Dr”. Further, the directions of the axes of the orthogonal coordinates are simply referred to as “X direction”, “Y direction”, and “Z direction”. The upward direction along the “axial direction Da” corresponds to the “Z direction”, and the “right direction” corresponds to the “X direction”.

(Holding shaft)
As shown in FIG. 2, the holding shaft 50 is provided on the upper rim 30 and protrudes toward the lower rim 20. In the present embodiment, the holding shaft 50 has a cylindrical shape extending along the axis Ax. The holding shaft 50 is provided at a position where the cylindrical cylinder axis coincides with the axis Ax.

  The length of the holding shaft 50 is configured to be able to cope with different types of tires TR to be held. For example, the length of the holding shaft 50 is shortened so that the tip of the holding shaft 50 does not interfere with the lower rim 20 when the upper rim 30 is closest to the lower rim 20. On the other hand, the length of the holding shaft 50 is increased to such an extent that the wrap length with the engaging portion can be maintained even when the tire TR having a wide rim width is held.

(Fitting portion)
As shown in FIG. 2, the fitting part 60 is provided in the lower rim 20, and has the recessed part 60a which fits the holding shaft 50 so that insertion or removal is possible.
In the present embodiment, the fitting portion 60 includes a cylindrical portion 61 that protrudes toward the upper rim 30 and has an inner peripheral surface 60b that extends along the axis Ax, and the inner peripheral surface 60b defines a recess 60a. The cylindrical portion 61 is provided at a position where the cylindrical axis coincides with the axis Ax.
Therefore, as shown in FIG. 3, when the upper rim 30 is brought close to the lower rim 20, the tire holding device 10 is configured such that the holding shaft 50 and the recess 60 a are fitted.

(Regulation Department)
As shown in FIGS. 4 and 5, the restricting portion 70 of the present embodiment includes an upper case 71 having a plurality of claw portions 71 a arranged in the circumferential direction Dc, a lower case 72, and an elevating member 73. Is provided. Each claw portion 71a has an inner peripheral surface 71s that faces the outer peripheral surface of the drive shaft 42 and extends in the axial direction Da. The upper case 71, the lower case 72, and the elevating member 73 each have a substantially rotating body shape with the axis line Ax as the rotation axis. The restricting portion 70 is provided on the drive shaft 42 so that the drive shaft 42 passes through the rotation shafts of the upper case 71, the lower case 72, and the elevating member 73. The restricting portion 70 is fixed to the frame 95.
The elevating member 73 has a tapered portion 73a having a tapered inner peripheral surface whose diameter decreases toward the bottom in the upper portion.

Each of the upper case 71 and the lower case 72 has a cavity inside, and forms one cavity that houses the elevating member 73 by being vertically aligned.
The lower case 72 includes a seal portion 72c between the drive shaft 42 passing therethrough. The elevating member 73 includes a seal portion 73 b between the penetrating drive shaft 42 and a seal portion 73 c between the outer peripheral surface of the elevating member 73 and the inner peripheral surface of the lower case 72. As a result, an airtight portion 72 b is formed below the elevating member 73 in the cavity inside the lower case 72. Thus, the restricting portion 70 maintains the airtightness of the airtight portion 72b while allowing the upper case 71 and the lower case 72 and the elevating member 73 to be separately slidable in the axial direction Da with respect to the drive shaft 42. it can.

  Therefore, as shown in FIGS. 6 and 7, when the compressed air is introduced from the compressor COM2 of the factory equipment into the airtight portion 72b through the air supply hole 72a of the lower case 72, the elevating member 73 is moved in the axial direction. It raises along Da and it is comprised so that the nail | claw part 71a may be pressed from outer periphery with the taper part 73a. Each of the pressed claw portions 71a bends inward in the radial direction Dr, thereby holding the penetrating drive shaft 42 between the inner peripheral surfaces 71s and restricting the movement of the drive shaft 42 in the axial direction Da.

  In the present embodiment, as described above, the restriction portion 70 restricts the drive shaft 42 by introducing compressed air into the airtight portion 72 b and pushing up the elevating member 73. When releasing the restriction, the restriction part 70 may release the restriction by introducing compressed air into an airtight part separately provided on the upper part of the elevating member 73 and pushing down the elevating member 73.

  In the present embodiment, air is used to raise and lower the elevating member 73 by air pressure. However, any fluid may be used as long as it is a fluid. For example, compressed oil is introduced into the lower portion of the elevating member 73, The elevating member 73 may be raised and lowered by hydraulic pressure.

(Function)
An operation (mechanism) guided from the tire holding device 10 of the present embodiment will be described.
When the tire TR is disposed concentrically on the lower rim 20 on the base portion 93, the tire holding device 10 moves the drive shaft 42 downward in the axial direction Da with the cylinder 41 and moves the upper rim 30 relative to the lower rim 20. The holding shaft 50 and the recess 60a are fitted to each other.
At this time, the holding shaft 50 is fitted into the recess 60a while being guided by the inner peripheral surface 60b. Therefore, the tire holding device 10 can bring the upper rim 30 close to the lower rim 20 and the tire TR while ensuring concentricity.

When the upper rim 30 is brought close to the position corresponding to the rim width of the tire TR with respect to the lower rim, the tire holding device 10 raises the elevating member 73 of the restricting portion 70 toward the claw portion 71a and drives the drive shaft 42. The movement in the axial direction Da is regulated.
After restricting the movement of the drive shaft 42 in the axial direction Da, the tire holding device 10 sends compressed air into the tire TR disposed between the lower rim 20 and the upper rim 30, and the compressed air is injected into the tire TR. Fill.
At this time, an upward force in the axial direction Da is applied to the upper rim 30 by the pressure of the compressed air inside the tire TR.
In the tire holding device 10, when packing deterioration or the like occurs due to aging, internal leakage of the cylinder 41 occurs. When an internal leak occurs, movement of the drive shaft 42 in the axial direction Da that should be held at a predetermined position with respect to the upward force in the axial direction Da occurs, and the rim width increases from the set value. May cause poor quality.
Furthermore, the cylinder 41 has a guide for the drive shaft 42, and this guide causes wear due to aged sliding friction and radial reaction force, thereby causing a misalignment of the drive shaft 42 and the upper rim 30. And the aged concentricity with the lower rim 20 cannot be secured.
In the present embodiment, since the tire holding device 10 restricts the movement of the drive shaft 42 in the axial direction Da by the restricting portion 70, the tire retaining device 10 relates to the rim width dimension by suppressing the spread of the rim width from the set value. The quality defect of the tire TR can be prevented.

(effect)
When the tire holding device 10 holds the tire TR between the lower rim 20 and the upper rim 30, the tire holding device 10 is used over time to fit the holding shaft 50 and the recess 60a of the fitting portion 60. The misalignment between the lower rim 20 and the upper rim 30 can be suppressed, and the mechanical concentricity between the lower rim 20 and the upper rim 30 can be ensured. Therefore, even under long-term use, the tire holding device 10 can suppress the concentricity defect of the held tire TR and maintain the quality of the tire TR.

  Further, since the concave portion 60a defined by the inner peripheral surface 60b of the cylindrical portion 61 and the holding shaft 50 are fitted, the tire holding device 10 causes the tire gripping portion 40 to move the upper rim 30 with respect to the lower rim 20 in the axial direction. By making it close to Da, the holding shaft 50 and the cylindrical portion 61 can be fitted.

Furthermore, since the tire holding device 10 can regulate the movement of the upper rim 30 in the axial direction Da, the rim width can be increased from the set value even if internal leakage of the cylinder due to aged use due to deterioration of packing or the like occurs. Can be suppressed. Therefore, the tire holding device 10 can guarantee the rim position holding accuracy and maintain the quality of the tire TR even under long-term use.
<Second embodiment>
A second embodiment according to the present invention will be described with reference to FIG.

  The structure of the tire holding device 110 of the present embodiment is basically the same as that of the first embodiment, except that the holding shaft and the fitting portion are provided upside down. Other configurations are the same as those in the first embodiment.

As shown in FIG. 8, the tire holding device 110 includes a holding shaft 150 and a fitting portion 160.
The holding shaft 150 is provided on the lower rim 20 and protrudes toward the upper rim 30. In the present embodiment, the holding shaft 150 has a cylindrical shape extending along the axis Ax. The holding shaft 150 is provided at a position where the columnar cylindrical axis coincides with the axis Ax.

The fitting portion 160 is provided on the upper rim 30 and fits the holding shaft 150 so that it can be inserted and removed. The fitting portion 160 includes a cylindrical portion 161 having an inner peripheral surface that protrudes toward the lower rim 20 and extends along the axis Ax, and the inner peripheral surface defines a recess 160a. The cylindrical portion 161 is provided at a position where the columnar axis coincides with the axis Ax.
For this reason, when the upper rim 30 is brought close to the lower rim 20, the tire holding device 110 is configured such that the concave portion 160a and the holding shaft 150 are fitted.

  The tire holding device 110 feeds compressed air into the inside of the tire TR disposed between the lower rim 20 and the upper rim 30 from the peripheral position of the axis line Ax of the lower rim 20 through the through hole 193a of the base 193.

  When the tire holding device 110 holds the tire TR between the lower rim 20 and the upper rim 30, the tire holding device 110 fits the holding shaft 150 and the recess 160 a of the fitting portion 160. For this reason, the tire holding device 110 can suppress misalignment between the lower rim 20 and the upper rim 30 over time, and can ensure mechanical concentricity between the lower rim 20 and the upper rim 30. . Further, the holding shaft 150 and the cylindrical portion 161 can be fitted by bringing the upper rim 30 closer to the lower rim 20 in the axial direction Da.

<Third embodiment>
A third embodiment according to the present invention will be described with reference to FIG.

  The structure of the tire holding device 210 of the present embodiment is basically the same as the structure of the first embodiment, except that the holding shaft and the fitting portion are provided at positions shifted from the axis Ax. Other configurations are the same as those in the first embodiment.

As shown in FIG. 9, the tire holding device 210 includes a holding shaft 250 and a fitting portion 260.
The holding shaft 250 is provided on the upper rim 30 and protrudes toward the lower rim 20. In the present embodiment, the holding shaft 250 has a cylindrical shape extending along the axis Ax. The holding shaft 250 is provided at a position where the cylindrical columnar axis is displaced in the radial direction Dr with respect to the axis Ax.

  The fitting portion 260 is provided on the lower rim 20 and has a concave portion 260a into which the holding shaft 250 is detachably fitted.

In the present embodiment, the fitting portion 260 includes a cylindrical portion 261 that protrudes toward the upper rim 30 and has an inner peripheral surface that extends along the axis Ax, and the inner peripheral surface defines a recess 260a. The cylindrical portion 261 is provided at a position that is shifted in the radial direction Dr with respect to the axis Ax and that coincides with the columnar axis of the holding shaft 250.
For this reason, when the upper rim 30 is brought close to the lower rim 20, the tire holding device 210 is configured such that the holding shaft 250 and the recess 260a are fitted.

  The tire holding device 210 sends compressed air into the inside of the tire TR disposed between the lower rim 20 and the upper rim 30 from a position that coincides with the axis Ax of the lower rim 20 through the through hole 293a of the base portion 293. .

  When the tire holding device 210 holds the tire TR between the lower rim 20 and the upper rim 30, the tire holding device 210 fits the holding shaft 250 and the concave portion 260a of the fitting portion 260. For this reason, the tire holding device 210 can suppress misalignment between the lower rim 20 and the upper rim 30 under aging and can ensure mechanical concentricity between the lower rim 20 and the upper rim 30. . In addition, the tire holding device 210 can fit the holding shaft 250 and the cylindrical portion 261 by bringing the upper rim 30 close to the lower rim 20 in the axial direction Da.

<Fourth embodiment>
A fourth embodiment according to the present invention will be described with reference to FIG.

  The structure of the tire holding device 310 of this embodiment is basically the same as that of the first embodiment, except that a plurality of holding shafts and fitting portions are provided at positions shifted from the axis Ax. Other configurations are the same as those in the first embodiment.

As shown in FIG. 10, the tire holding device 310 includes two holding shafts 350 and two fitting portions 360.
Each holding shaft 350 is provided on the upper rim 30 and protrudes toward the lower rim 20. In the present embodiment, each holding shaft 350 has a cylindrical shape extending along the axis Ax. Each of the holding shafts 350 is provided at a position where the cylindrical columnar axes are shifted from the axis Ax on the opposite side to the radial direction Dr.

  Each fitting portion 360 is provided on the lower rim 20 and has a recess 360a into which the opposing holding shaft 350 is detachably fitted.

In the present embodiment, each fitting portion 360 includes a cylindrical portion 361 having an inner peripheral surface that protrudes toward the upper rim 30 and extends along the axis Ax, and each inner peripheral surface defines a recess 360a. . The two cylindrical portions 361 are provided at positions shifted from each other on the opposite side in the radial direction Dr with respect to the axis Ax. Each cylindrical portion 361 is provided at a position corresponding to the cylindrical axis of the holding shaft 350 facing each other.
For this reason, when the upper rim 30 is brought close to the lower rim 20, the tire holding device 310 is configured such that the holding shafts 350 and the concave portions 360a facing each other are fitted.

  The tire holding device 310 sends compressed air into the inside of the tire TR disposed between the lower rim 20 and the upper rim 30 from a position that coincides with the axis Ax of the lower rim 20 through the through hole 393a of the base 393. .

  In the present embodiment, since two sets of the holding shaft 350 and the fitting portion 360 that are opposed to each other are shifted to the opposite side in the radial direction Dr, the concentricity is ensured equally in the shifted direction. Can do.

  In the present embodiment, two sets of the holding shaft 350 and the fitting portion 360 facing each other are provided, but three or more sets may be provided as a modified example. For example, when three sets are provided, if a holding shaft and a fitting portion are provided every 120 ° in the circumferential direction Dc around the axis Ax, the concentricity can be evenly ensured in the circumferential direction Dc. When four sets are provided, if a holding shaft and a fitting portion are provided every 90 ° in the circumferential direction Dc around the axis Ax, the concentricity can be ensured evenly in the circumferential direction Dc.

  When the tire holding device 310 holds the tire TR between the lower rim 20 and the upper rim 30, the tire holding device 310 fits the holding shaft 350 and the concave portion 360 a of the fitting portion 360. For this reason, the tire holding device 310 can suppress misalignment between the lower rim 20 and the upper rim 30 under aging and can ensure mechanical concentricity between the lower rim 20 and the upper rim 30. . The tire holding device 310 can fit the holding shaft 350 and the cylindrical portion 361 by bringing the upper rim 30 close to the lower rim 20 in the axial direction Da.

<Fifth embodiment>
A fifth embodiment according to the present invention will be described with reference to FIG.

  The structure of the tire holding device 410 of this embodiment is basically the same as the structure of the first embodiment, except that the recess is a hole formed in the lower rim and the base. Other configurations are the same as those in the first embodiment.

As shown in FIG. 11, the tire holding device 410 includes a holding shaft 450 and a fitting portion 460.
The holding shaft 450 is provided on the upper rim 30 and protrudes toward the lower rim 20. In the present embodiment, the holding shaft 450 has a cylindrical shape extending along the axis Ax. The holding shaft 450 is provided at a position where the columnar cylindrical axis coincides with the axis Ax.

The fitting portion 460 is provided on the lower rim 20 and fits the holding shaft 450 so that it can be inserted and removed. The lower rim 20 opens toward the upper rim 30 and has a cylindrical hole extending from the upper surface of the lower rim 20 toward the base portion 493 along the axis Ax. This cylindrical hole defines a recess 460 a as the fitting portion 460. The recess 460a is provided at a position where the cylindrical axis of the hole coincides with the axis Ax. In the present embodiment, the recess 460 a extends not only to the lower rim 20 but also to the base 493.
For this reason, when the upper rim 30 is brought close to the lower rim 20, the tire holding device 410 is configured such that the holding shaft 450 and the recess 460a are fitted.

  The tire holding device 410 feeds compressed air into the inside of the tire TR disposed between the lower rim 20 and the upper rim 30 from a position around the axis Ax of the lower rim 20 through the through hole 493a of the base 493.

  The cylindrical hole that defines the recess 460a may be provided only in the lower rim 20, or may extend through the lower rim 20 and into the base 493 when a long hole is required.

  Further, as in the above-described embodiment, as a modification, the holding shaft 450 and the concave portion 460a may be provided at a position shifted from the axis Ax. As another modification, two sets of the holding shaft 450 and the recess 460a facing each other may be provided so that each set is shifted to the opposite side to the radial direction Dr, or three or more sets are arranged side by side in the circumferential direction Dc. May be.

  As yet another modification, the lower rim 20 may be provided with a holding shaft 450 and the upper rim 30 may be provided with a recess 460a. In this case, the upper rim 30 has a cylindrical hole that opens toward the lower rim 20 and extends from the lower surface of the upper rim 30 toward the drive shaft 42 along the axis Ax.

  When the tire holding device 410 holds the tire TR between the lower rim 20 and the upper rim 30, the tire holding device 410 fits the holding shaft 450 and the recess 460 a of the fitting portion 460. For this reason, the tire holding device 410 can suppress misalignment between the lower rim 20 and the upper rim 30 under aged use, and can ensure mechanical concentricity between the lower rim 20 and the upper rim 30. . In addition, the tire holding device 410 can fit the holding shaft 450 and the concave portion 460a by bringing the upper rim 30 closer to the lower rim 20 in the axial direction Da.

<Sixth embodiment>
A sixth embodiment according to the present invention will be described with reference to FIGS.

  The structure of the tire holding device 510 of this embodiment is basically the same as the structure of the first embodiment, except that the tapered portion and the claw portion of the restricting portion are provided upside down. Other configurations are the same as those in the first embodiment.

  The restricting portion 170 of the present embodiment includes an upper case 171, a lower case 172, and a lifting member 173 having a plurality of claw portions 173a. Each claw portion 173 a has an inner surface extending in the axial direction Da along the drive shaft 42. The upper case 171, the lower case 172, and the elevating member 173 each have a substantially rotating body shape with the axis Ax as the rotation axis. The restricting portion 170 is provided on the drive shaft 42 such that the drive shaft 42 passes through the rotation shafts of the upper case 171, the lower case 172, and the elevating member 173. The lower case 172 has a tapered portion 172a having a tapered inner peripheral surface with a diameter decreasing downward.

  In the open state of FIG. 12, when the compressed air is introduced from the compressor COM3 of the factory equipment to the airtight part 171b through the air supply hole 171a of the upper case 171, the elevating member 173 descends along the axial direction Da. The claw portion 173a is pressed from the outer periphery by the taper portion 172a. Each pressed claw portion 173a bends inward in the radial direction Dr, thereby holding the penetrating drive shaft 42 between the inner peripheral surfaces as shown in FIG. 13 and restricting the movement of the drive shaft 42 in the axial direction Da. To do.

  Since the tire holding device 510 can restrict the movement of the upper rim 30 in the axial direction Da, even if an internal leak of the cylinder due to aging due to packing deterioration or the like occurs, the spread of the rim width from the set value is suppressed. be able to.

<Seventh embodiment>
A seventh embodiment according to the present invention will be described with reference to FIG.

  The structure of the tire holding device 610 of this embodiment is basically the same as the structure of the first embodiment, but is different in that it does not include a restricting portion. Other configurations are the same as those in the first embodiment.

  As shown in FIG. 14, the tire holding device 610 includes a lower rim 20 that supports the lower side of the tire TR, an upper rim 30 that supports the upper side of the tire TR, a tire gripping portion 40, a holding shaft 50, and a fitting. And a joint portion 60.

  When the tire holding device 610 holds the tire TR between the lower rim 20 and the upper rim 30, the tire holding device 610 fits the holding shaft 50 and the recess 60a of the fitting portion 60. The misalignment between the lower rim 20 and the upper rim 30 can be suppressed, and the mechanical concentricity between the lower rim 20 and the upper rim 30 can be ensured. Therefore, even under long-term use, the tire holding device 610 can suppress the concentricity defect of the held tire TR and maintain the quality of the tire TR.

<Eighth embodiment>
An eighth embodiment according to the present invention will be described with reference to FIG.

  The structure of the tire holding device 710 of this embodiment is basically the same as the structure of the first embodiment, except that the holding shaft and the fitting portion are not provided. Other configurations are the same as those in the first embodiment.

  As shown in FIG. 15, the tire holding device 710 includes a lower rim 20 that supports the lower side of the tire TR, an upper rim 30 that supports the upper side of the tire TR, a tire gripping unit 40, and a regulating unit 70. Prepare.

  Since the tire holding device 710 can restrict the movement of the upper rim 30 in the axial direction Da, even if an internal leak of the cylinder due to aging due to packing deterioration or the like occurs, the spread of the rim width from the set value is suppressed. be able to. Therefore, the tire holding device 710 can guarantee the rim position holding accuracy and maintain the quality of the tire TR even under long-term use.

  As mentioned above, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the invention described in the claims and equivalents thereof, as long as they are included in the scope and gist of the invention.

Although the tire cooling device of the above-described embodiment performs natural air cooling, as a modification, forced cooling may be performed.
For example, the tire cooling device may include a rotary movable unit using a bearing or the like at the base and a high-speed rotary motor. In this case, the tire cooling device can perform forced air cooling by rotating the tire TR held by the tire holding device at a high speed around the axis of the tire TR.
Further, the tire cooling device may include an air blowing unit such as a compressor or a blower. In this case, the tire cooling device can perform forced air cooling by blowing air to the tire TR held by the tire holding device.

  In the above-described embodiment, the rims are brought close to each other and the holding shaft and the concave portion are fitted, but as a modification, a chamfered or tapered surface is provided at the tip of each of the holding shaft and the concave portion, Even if they are slightly misaligned, they may be concentric by being brought close to each other.

  In the above-described embodiment, the cylinder has the drive shaft advanced and retracted by hydraulic pressure, but any fluid may be used as long as the cylinder is advanced and retracted by fluid pressure.

  In the above-described embodiment, the holding shaft and the concave portion of the fitting portion have a cylindrical shape. However, any shape may be used as long as it is a middle shape, for example, a triangular prism shape or a quadrangular prism shape.

  In the above-described embodiment, the elevating member is moved up and down by the fluid pressure technique using the fluid in the upper case or the lower case in the restricting portion, but the rod extending outside the upper case or the lower case is fixed to the elevating member. The lifting member may be mechanically moved up and down by pushing and pulling the rod from outside the case.

  In the above-described embodiment, the claw portion is pressed from the outer periphery by the taper portion to restrict the axial movement of the drive shaft. However, as a modification, it is a divided ring divided in the circumferential direction Dc and inside the radial direction Dr. On the other hand, the movement of the drive shaft in the axial direction may be restricted by sandwiching the drive shaft.

  In the above-described embodiment, the tire holding device holds one tire, but may hold a plurality of tires. When holding a plurality of tires, the lower rim, upper rim, tire gripping part, etc. are provided symmetrically with respect to the base, or the lower rim, upper rim, tire gripping part, etc. are provided side by side on the tire. The holding device can hold a plurality of tires. Further, the tire holding device may be a combination of these, and a configuration in which a lower rim, an upper rim, a tire gripping portion, and the like are provided vertically symmetrically with respect to the base may be provided side by side.

  The tire holding device of the present invention can maintain the quality of the tire even under long-term use.

DESCRIPTION OF SYMBOLS 1 Tire cooling device 10 Tire holding device 20 Lower rim 20a Through-hole 30 Upper rim 40 Tire gripping part 41 Cylinder 42 Drive shaft 50 Holding shaft 60 Fitting part 60a Recess 60b Inner peripheral surface 61 Cylindrical part 70 Restriction part 71 Upper case 71a Claw Portion 71s Inner peripheral surface 72 Lower case 72a Air supply hole 72b Airtight portion 72c Sealing portion 73 Lifting member 73a Taper portion 73b Sealing portion 73c Sealing portion 92 Air supply pipe 93 Base portion 93a Through hole 94 Post 95 Frame 110 Tire holding device 150 Holding shaft 160 fitting part 160a concave part 161 cylindrical part 170 regulating part 171 upper case 171a air supply hole 171b airtight part 172 lower case 172a taper part 173 elevating member 173a claw part 193 base part 193a through hole 210 tire holding device 250 holding shaft 260 fitting part 260a recess 2 61 Cylindrical portion 293 Base portion 293a Through hole 310 Tire holding device 350 Holding shaft 360 Fitting portion 360a Recessed portion 361 Cylindrical portion 393 Base portion 393a Through hole 410 Tire holding device 450 Holding shaft 460 Fitting portion 460a Recessed portion 493 Base portion 493a Through hole 510 Tire holding portion Device 610 Tire holding device 710 Tire holding device COM1 Compressor COM2 Compressor COM3 Compressor TR Tire

Claims (5)

A first rim capable of supporting one side in the width direction of the tire;
A second rim capable of supporting the other side of the tire in the width direction;
A drive shaft attached to the second rim, and a cylinder that advances and retracts the drive shaft by fluid pressure, and the tire is moved closer to and away from the first rim. Tire gripping part for gripping,
A holding shaft provided on one rim of the first rim and the second rim and projecting toward the other rim;
A tire holding device, comprising: a fitting portion provided on the other rim and having a recess for fitting the holding shaft so as to be detachable. The holding shaft has a shape extending along the axis of the drive shaft;
2. The tire according to claim 1, wherein the fitting portion includes a cylindrical portion having an inner peripheral surface that protrudes toward the one rim and extends along the axis, and the inner peripheral surface defines the recess. Holding device.   The tire holding device according to claim 1, further comprising a restricting portion capable of restricting movement of the second rim in the axial direction. A first rim capable of supporting one side in the width direction of the tire;
A second rim capable of supporting the other side of the tire in the width direction;
A drive shaft attached to the second rim, and a cylinder that advances and retracts the drive shaft by fluid pressure, and the tire is moved closer to and away from the first rim. Tire gripping part for gripping,
And a restricting portion capable of restricting movement of the second rim in the axial direction.   The tire holding device according to claim 4, wherein the restricting portion restricts movement of the drive shaft in an axial direction while sandwiching an outer periphery of the drive shaft.

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