JP4914305B2 - Post inflator - Google Patents

Description

  The present invention relates to a post inflator for inflating and cooling a vulcanized tire.

  Conventionally, a post inflator is cooled to a certain temperature at which the shrinkage of the reinforcing fibers is settled, for example, 100 degrees or less or 80 degrees or less in a state where air is sealed in a vulcanized tire and the shape is properly maintained. .

  In general, tires have various sizes, and it is necessary to change the interval between the support portions that support the rim in accordance with each tire size. For example, Patent Document 1 discloses a post-inflator device.

  The post inflator described in Patent Document 1 holds a vulcanized tire discharged from a vulcanizer between its upper and lower rims that can be brought into and out of contact with each other and encloses high pressure air in the tire for expansion and cooling. A post inflator apparatus for performing the above operation, wherein the upper and lower rims are concentric with the center position of the post inflator and are both placed in a horizontal state, and the lower rim is provided so as to be able to be raised and lowered in the vertical direction and discharged from the vulcanizer. As a transport mechanism for carrying the cured vulcanized tire onto the lower rim and positioning the carry-in position correctly, an endless belt that is driven and stopped in a horizontal state and a lateral direction with respect to the tire traveling direction A pair of adjustable centering members for positioning the tire and the front end in the tire traveling direction for positioning in the front-rear direction of the tire traveling direction. That a centering member for output is provided and is characterized in.

  The post inflator described in Patent Document 1 is a so-called two-cycle post inflator capable of holding tires above and below the center frame as shown in FIG. In the post-inflator described in Patent Document 1, the retention time of a vulcanized tire can be taken up to nearly twice the vulcanization time, and this type is still widely used in the market today.

  Further, in the vulcanizer of Patent Document 1, the lower rim support 38 is screwed with the adjusting screw 41 when adjusting the distances (rim width) between the upper and lower rims 10 and 11 or the upper and lower rims 34 and 35. The distance between the upper rim and the upper rim can be changed to be larger or smaller by pivoting through the shaft. At this time, the detent 49 is pivotally attached to the lift beam 12 via the spring 50 and the pivot 58 to prevent the detent. 49 is elastically engaged with a plurality of grooves 57 arranged in a row on the outer periphery of the rim support 38, thereby fixing after adjustment.

  Furthermore, in Patent Document 2, the vulcanized tire 1 can be cooled in a short time without enlarging the size of the apparatus or complicating the mechanism and without causing a significant increase in parts cost and running cost. A post cure inflator is disclosed.

  The post-cure inflator described in Patent Document 2 is a vulcanized tire holding mechanism for holding a vulcanized tire, and forced convection is more dominant than natural convection with respect to the air flow around the vulcanized tire. And a rotational drive mechanism for rotating the vulcanized tire at a high speed via the vulcanized tire holding mechanism.

  In the vulcanized tire 1 described in Patent Document 2, the upper and lower bead portions 1a and 1b are sandwiched between the upper rim 11 and the lower rim 16, and are enclosed in the tire by the rim holding mechanisms 2 and 3 and the lock mechanism 31 thereof. The reaction force due to compressed air is maintained. In the example of FIG. 1, since the upper and lower beads and the upper and lower rims are strongly pressed when the tire is inflated, the rotational force of the upper rim is transmitted to the lower rim through the tire, the tire, the upper and lower rims, the upper rim connecting member, and the lower rim holding The member will rotate. In the example of FIG. 12, the entire lock mechanism including the upper and lower support members in addition to the tire and the upper and lower rims is also rotated by the drive motor 71. Further, air exclusion mechanisms are provided above and below the rotating tire to improve the cooling effect.

JP-A-51-61582 JP 2006-137054 A

  Here, in the post inflator described in Patent Document 1, the time during which expansion cooling can be performed is slightly less than twice the vulcanization time, and if the cooling time is longer than that, it is necessary to make the vulcanizer stand by. Become. In particular, vulcanization time has been gradually shortened due to recent technological advances, and post-inflators with more efficient cooling performance are expected.

  The tire vulcanizer is designed to vulcanize various types of tires according to the market. Therefore, the post inflator needs to inflate and cool various tires. The tire size is usually indicated by the inner diameter and the tire width of the bead portion, and tires having a plurality of tire widths are standardized even with the same bead diameter. When the widths are different, rims having different bead widths are used. When the inner diameter of the bead is changed in the tire size, the upper and lower rims are changed in the post inflator, and the upper and lower rim intervals (rim width) are further adjusted according to the upper and lower bead widths.

  In this current situation, the post inflator described in Patent Document 1 requires manual width adjustment in addition to exchanging the rim during size exchange. The post inflator is located at the rear of the vulcanizer, and the working environment for rim replacement and width adjustment is extremely poor, and labor saving of replacement work is expected.

  An object of the present invention is to provide a post inflator capable of simplifying a tire replacement operation.

(1)
The post inflator according to the present invention is a post inflator that inflates and cools a vulcanized tire, includes a holding portion that can hold the inflated tire, and can be adjusted to a bead width according to a tire type by a screw mechanism. A tire holding mechanism including a possible bead width adjusting mechanism, and a driving device capable of rotating the tire holding mechanism when the tire is inflated and cooled. The bead width adjusting mechanism is used for changing the tire type. The rotational force from the drive device can be applied to the screw mechanism to move the holding portion.

  In the post inflator according to the present invention, the tire can be held by the holding portion, and the tire inflated by the driving device can be rotated and cooled. Further, the beat width adjusting mechanism can apply the rotational force of the driving device to the screw mechanism and move the holding portion according to the beat width of the tire.

  In this case, the bead width adjusting mechanism can adjust the interval between the holding portions according to the bead width of the tire by using the driving force of the driving device. As a result, there is no need to provide a separate drive mechanism for the adjustment mechanism when changing the tire size, and the structure is simplified by sharing the drive device for the post inflator tire and the bead width adjustment mechanism. In addition, cost reduction can be realized.

(2)
The post inflator may include a brake that fixes one screw of the screw mechanism including male and female screws when a rotational force from the driving device is applied to the screw mechanism.

  In this case, one of the male and female screw mechanisms is fixed by the brake, and the rotational force from the driving device is applied to the other, so that the holding portion is moved by the lead each time the screw mechanism rotates once. it can. As a result, one of the male and female screws can be securely fixed with a simple structure.

(3)
The post inflator according to the present invention is a post inflator that inflates and cools a vulcanized tire sandwiched between a pair of rims, and a male screw is fixed by rotating a pair of male and female screws that are screwed together. And a bead width adjusting mechanism for adjusting the rim width to the rim width according to the tire bead width by moving the rim of the tire toward and away from the other rim in the axial direction of the screw. A bead width including a lock mechanism that can be held via a drive, a drive device that can rotate the lock mechanism together with the tire, and a screw fixing mechanism that is fixed in position for fixing and releasing the female screw. The adjustment mechanism is configured such that when the tire type is changed, the female screw is fixed by the screw fixing mechanism and the rotation of the female screw is stopped, and the rotation of the driving device is performed via the lock mechanism. By transmitting to the screw, the male screw is rotated relative to the female screw, and the male screw is advanced and retracted in the axial direction with respect to the lock mechanism, whereby one rim is moved relative to the other rim. The rim width is adjusted by approaching and separating.

  In the post inflator according to the present invention, the bead width adjusting mechanism locks the rotation of the driving device in a state where the female screw is fixed by the screw fixing mechanism and the rotation of the female screw is stopped when the tire type is changed. By transmitting to the male screw through the mechanism, the male screw is rotated relative to the female screw, and the male screw is moved forward and backward in the axial direction with respect to the lock mechanism, whereby one rim is moved to the other. The rim width is adjusted by moving away from the rim.

  In this case, the bead width adjusting mechanism can adjust the interval between the holding portions according to the bead width of the tire by using the driving force of the driving device. As a result, there is no need to provide a separate drive mechanism for the adjustment mechanism when changing the tire size, and the structure is simplified by sharing the drive device for the post inflator tire and the bead width adjustment mechanism. In addition, cost reduction can be realized.

(4)
The post inflator according to the present invention is a post inflator that inflates and cools a vulcanized tire sandwiched between a pair of rims, and a male screw is fixed by rotating a pair of male and female screws that are screwed together. And a bead width adjusting mechanism for adjusting the rim width to the rim width according to the tire bead width by moving the rim of the tire toward and away from the other rim in the axial direction of the screw. A bead width including: a lock mechanism that can be held via a drive; a drive device that can rotate the lock mechanism together with the tire; and a screw fixing mechanism that is fixed in position for fixing and releasing the male screw. When the tire type is changed, the adjustment mechanism fixes the male screw with the screw fixing mechanism, and the rotation of the driving device is transmitted to the female screw while the rotation of the male screw is stopped. Thus, by rotating the female screw relative to the male screw and moving the male screw forward and backward in the axial direction with respect to the lock mechanism, one rim is moved closer to and away from the other rim. The width is adjusted.

  In this case, the male screw is fixed by the screw fixing mechanism, and the rotation of the driving device is transmitted to the female screw in a state where the rotation of the male screw is stopped, and one rim is transferred to the other rim by the female screw and the male screw. The rim width can be adjusted when changing the tire type. As a result, there is no need to provide a separate drive mechanism for the adjustment mechanism when changing the tire size, and the structure is simplified by sharing the drive device for the post inflator tire and the bead width adjustment mechanism. In addition, cost reduction can be realized.

(5)
The drive device is preferably composed of a hydraulic motor.

  In this case, since the drive device is composed of a hydraulic motor, it can correspond to a wide speed range with high torque. Further, the hydraulic motor can be easily downsized. As a result, the post inflator can be downsized.

  Hereinafter, a post inflator according to the present invention will be described with reference to the drawings.

  1 is a cross-sectional view showing a structure of a post inflator according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line B-B of FIG. 1, and FIG. 3 is a cross-sectional view of the post inflator of FIG. It is a schematic diagram for demonstrating the detail of a locking mechanism.

  As shown in FIG. 1, the post inflator 50 is inflated by sealing the upper bead portion 1 a of the tire 1 with the upper rim 11 and sealing the lower bead portion 1 b with the lower rim 4 and introducing compressed air into the tire 1. A device for cooling. Here, the pressure enclosed in the tire 1 during cooling is equivalent to the actual working pressure of the tire 1. In this case, a reaction force against the upper rim 11 and the lower rim 4 is generated by the internal pressure of the tire 1, but the post inflator 50 is attached with a lock mechanism that holds the reaction force. In the present embodiment, a lock mechanism including the locking shaft 21 and the lower lock member 6 is provided.

  Generally, a post inflator is installed in the vicinity of a vulcanizer so that a tire taken out from the vulcanizer can be received, and one or two sets of tires are inflated and cooled simultaneously in a frame that can be reversed in the vertical direction. One set or two sets of expansion / cooling sections are attached separately for each set. On the other hand, in the vulcanizer, a plurality of types are mainly used: a double press capable of mounting a maximum of two sets of molds and a single press capable of mounting only one set of molds. In the case of using a double press, two sets of expansion cooling parts are attached to the frame on the post inflator, and in the case of using the latter single press, one set of expansion cooling parts is attached to the frame. The lift beam to which the lower rim is attached is provided below the frame so as to be vertically movable with respect to the frame. Further, a lift device for raising and lowering the lift beam and a guide are attached to the frame of the post inflator.

  Hereinafter, the operation and structure of the post inflator 50 will be described in detail. When the tire 1 is not held, the locking mechanism of the post inflator 50 is released, the lift beam 3 is lowered, and a sufficient space for carrying the tire 1 is provided between the upper rim 11 and the lower rim 4.

  The vulcanized tire 1 is taken out from the vulcanizer and then placed on the lower rim 4 by an automatic transfer device (not shown). After the tire 1 is placed on the lower rim 4, the lift beam 3 ascends vertically upward from the lock position shown in the attached drawing. In this case, the tire 1 is compressed by a from the state of expansion and cooling. Then, as shown in FIG. 3, the lock plate 8 and the connecting pin 7 engaged with the polygonal hole and the polygonal column are rotated by a predetermined angle by the lock cylinder 10 (only the rod is shown) at the position. The upper part of the connecting pin 7 is fixed to the lower lock member 6, and the guide plate 9 is a guide for rotating the connecting pin 7. Further, the upper shaft portion of the connecting pin 7 is formed so as to be fitted into the concave hole of the locking shaft 21. The lower rim support 5 is inserted with a lock pin 35 by a cylinder 34 so that the lower lock member 6 does not rotate when the lower lock member 6 rotates, and is fixed so as not to rotate horizontally with respect to the lift beam 3 about the vertical axis. Has been.

  When the connecting pin 7 rotates, the lower lock member 6 fixed to the connecting pin 7 also rotates. A known breech lock mechanism is provided at the lower part of the lower lock member 6 and the locking shaft 21 so that the lower lock member 6 can be engaged with each other when rotated and the lower lock member 6 can be lowered when the lower lock member 6 is restored. In the present embodiment, the locking shaft is provided with a cruciform protrusion, and the lower locking member is provided with a cruciform hole. By rotating 45 degrees relative to each other, the protrusion and the protruding portion around the hole are Engagement and disengagement are possible. When in the locked state, compressed air that expands the tire 1 is supplied from the rotary joint 28 and the air introduction path 27.

  As shown in FIG. 1, when the air pressure in the tire 1 increases, the lift beam 3, the lower rim 4, and the lower lock member 6 are lowered by a in the vertically downward direction. In the state shown in FIG. 1, the locking shaft 21 and the lower rim 4 are prevented from rotating by the action of a rotation-preventing pin 6 a that engages with a groove formed in the vertical direction at the protrusion tip of the locking shaft. In this case, the locking shaft 21 and the lower lock member 6 are pressure-bonded by the internal pressure reaction force in the tire 1.

  When the lift beam 3 or the like is lowered to the locked state (the state where the rotation prevention pin 6a and the groove are engaged), the lock pin 35 is pulled out, and only the lift beam 3 is lowered, and the lower rim support 5, the guide plate 9, The connecting pin 7 and the lock member 6 are left on the upper tire 1 side. In this state, the drive motor 26 composed of a hydraulic motor attached to the main frame 2 via the motor bracket 25 is rotated so that the tire rotates at a high speed (for example, a tire rotation speed of 100 rpm or more) at the same level as the actual running state. Thus, the driven pulley 22 is rotated through the drive pulley 23 and the drive belt 24. Further, the rotational force of the driven pulley 22 is given as the rotational force of the rocking shaft 21 attached to the upper end. A locking sleeve 14 is fixed to the upper portion of the locking shaft 21 with a rotating pin 21a. The outer periphery of the lock sleeve 14 is supported by a bearing box 15 so as to be rotatable by two lower bearings 16 and an upper bearing 17.

  The outer peripheral portion of the lower bearing 16 is held in the bearing housing 15 by the bearing retainer 18, and the inner peripheral portion is fixed to the lock sleeve 14 by the bearing nut 19 together with the upper bearing 17 through the spacer 36. An adjustment nut 13 is fixed to the lower portion of the lock sleeve 14 so as to be rotatable with respect to the lock sleeve 14. The adjustment nut 13 is formed with a female screw portion, and the female screw portion is screwed with a male screw portion on the upper portion of the upper rim support 12. Further, a hole for attaching the pin 37 to the upper rim support 12 (plugged with a screw plug 14a in FIG. 1) is provided at the center of the lock sleeve 14. The pin 37 attached to the upper part of the upper rim support 12 is fitted in a long groove 21 b provided in the vertical direction on the outer periphery of the locking shaft 21.

  A brake plate 30a is fixed to the lower portion of the adjustment nut 13, and the rotation of the brake plate 30a can be stopped by a brake caliper 30b attached to the main frame 2 via a bracket 31. The brake plate 30a and the brake caliper 30b constitute a disc brake 30 (screw fixing mechanism). When the locking shaft 21 rotates during the rotation of the tire 1, the upper rim support rotates through the long groove 21b of the locking shaft and the pin 37. Further, in this state, the brake caliper 30b is released so that the brake plate 30a is rotatable, so that the lock sleeve 14, the adjustment nut 13, and the brake plate 30a also rotate together with the upper rim support 12. Further, since the locking shaft 21 and the lower lock member 6 are pressed by the internal pressure of the tire 1, the rotation of the locking shaft 21 is transmitted to the lower rim support 5. Thus, the rotation of the locking shaft 21 by the drive motor 26 is transmitted to the upper and lower rim supports, and the tire 1 rotates.

  After the tire 1 is inflated and cooled for a predetermined time, the rotational motion of the tire 1 is stopped, the lift beam 3 is raised from below, and is connected to the polygonal hole formed in the lock plate 8 attached to the lift beam 3 The polygonal column formed on the pin 7 is fitted. Here, in order to fit, it is necessary to detect the rotational position of the tire 1 and stop the tire 1 at a predetermined position of the disc brake 30 attached to the drive motor 26.

  And after stopping the lift beam 3 once in the predetermined position where the lock plate 8 and the connecting pin 7 fit, the compressed air in the tire 1 is discharged | emitted, and the lift beam 3 is raised further. Then, after the lock pin 35 is inserted into the hole of the lower rim support 5, the lock plate 8 is rotated by a predetermined angle by the lock cylinder 10 (reverse to the time of locking). Thereafter, when the lift beam 3 is lowered, the tire 1 is lowered on the lower rim 4.

  Next, a procedure for adjusting the bead width will be described. The adjustment of the bead width according to the present embodiment will be described with reference to a procedure when the lift beam 3 is lowered. The adjustment of the bead width is not limited to the case where the lift beam 3 is in the lowered state, and can be performed even in the raised state.

  First, the disc brake 30 shown in FIG. 2 is operated, the brake plate 30a is clamped by the brake caliper 30b, and then the rocking shaft 21 is rotated. Here, in the disc brake 30, pressure fluid is supplied from a pipe not shown in the brake caliper 30b, and the braking force of the disc brake 30 is generated by sandwiching the brake plate 30a from above and below. Further, when the brake caliper 30b is released, an air gap is formed between the brake plate 30a and the brake caliper 30b by an elastic force such as a spring.

  In this case, the locking shaft 21, the locking sleeve 14, and the upper rim support 12 rotate while the rotation of the adjustment nut 13 (female screw) to which the brake plate 30a is fixed is fixed. That is, a screw mechanism is constituted by a female screw portion formed on the inner peripheral surface of the adjustment nut 13 and a male screw portion (male screw) formed on the upper rim support 12 that is screwed to the female screw portion. In this case, when the lock sleeve 14, the upper rim support 12, and the locking shaft 21 rotate, the upper rim support 12 engages with the pin 37 in the long groove 21 b with respect to the space provided in the lock sleeve 14. Ascend or descend along. That is, when the locking shaft 21 rotates once, the upper rim support 12 is raised or lowered by the lead amount of one screw of the screw mechanism (female screw and male screw). After adjusting the bead width, it is necessary to stop the locking shaft 21 at a predetermined position so that the locking shaft 21 can be fitted when the lift beam 3 is raised.

In the post inflator 50 described above, while the rotation of the adjustment nut 13 is held by the disc brake 30, the upper rim support 12 is rotated with the locking shaft 21 using the driving force of the driving motor 26, and the locking shaft The distance between the upper and lower rims (rim width) can be adjusted with respect to the bead width of the tire 1 by moving along the 21 long grooves 21b. As a result, there is no need to provide a separate drive device, and the drive device for the tire 1 of the post inflator 50 and the drive device for the bead width adjusting mechanism are shared, thereby simplifying the structure and reducing the cost. it can. In addition, when adjusting the rim width, the rotation of the driving device can be automatically controlled based on the position of the upper rim support 12, and the rotation amount of the driving device can be automatically controlled, thereby simplifying the tire type change and replacement work. Can be planned. Further, the adoption of the disc brake 30 constituted by the brake caliper 30b and the brake plate 30a can ensure the fixation with a simple and simple structure.

  Further, the rotational speed and torque actually required for the drive motor 26 are greatly different between when the tire 1 is cooled and when the bead width is adjusted. That is, when the tire 1 is rotated and cooled, a maximum number of rotations of several hundreds of revolutions are required. However, a torque that can overcome the frictional resistance of the lower bearing 16 is sufficient, and about several tens N · m is sufficient. . On the other hand, in the case of adjusting the bead width, the frequency is low and the rotation speed may be slow. In practice, it is used at around 10 rotations per minute (10 rpm). Further, in order to overcome the friction of the screw and the resistance of the rotating portion, the torque is actually required to be 200 N · m or more.

  For example, if the number of rotations for adjusting the bead width is set to 100 rotations per minute (100 rpm) or more, there is a possibility that the screw portion may be seized. If the drive motor 26 is selected under these conditions, the use of an inverter motor or servo motor can be considered because the rotation speed is variable and stop accuracy is required if the motor used as the drive motor 26 for rotation is used as it is. However, in this case, the required torque is not generated during operation at a low motor speed. As a result, it is necessary to select a motor with a large size from the torque characteristics, and the cost cannot be increased and the structure cannot be simplified. In the present invention, by adopting a hydraulic motor that can be combined in a wide range of pressure and flow rate as the drive motor 26, the drive device can be made compact and the cost can be reduced.

  In the above-described embodiment, the rotation-cooled one-cycle post inflator 50 with high-speed rotation (100 rotations per minute (100 rpm) or more) is described. However, the low-speed tire 1 is added to the conventional two-cycle post inflator. In the example (open utility model publication No. Sho 62-164105) which intends to improve the quality of the tire 1, the common drive device of the present invention can be equipped. Further, the present invention can be applied not only to a low-speed rotation but also to a high-speed rotation cooling type two-cycle post inflator.

In the above embodiment, the driving force of the drive motor 26 is transferred to the upper rim via the locking shaft 21 (lock mechanism) while the rotation of the adjustment nut 13 (female screw) is fastened by the disc brake 30 (screw fixing mechanism). The upper rim support 12 (male thread) is transmitted to the support 12 (male thread) and is rotated relative to the adjustment nut, but the present invention is not limited to this. For example, in a state where the rotation of the upper rim support 12 (male screw) is fastened by the disc brake 30 (screw fixing mechanism) via the locking shaft 21 (lock mechanism), the driving force of the drive motor 26 is adjusted to the adjustment nut 13 (female). The adjustment nut 13 (female screw) may be rotated relative to the upper rim support 12 (male screw). In such a configuration, when the vulcanized tire is inflated and cooled, the driving force of the drive motor 26 is transmitted to the lock mechanism via the adjusting nut 13 (female screw), and the vulcanized tire is rotated. At this time, the driving force is a frictional force between the adjusting nut 13 (female screw) and the members (the upper rim support 12 and the lock sleeve 14) engaged therewith (that is, the reaction force from the inflated tire acts on the engaging portion). Is transmitted to the lock mechanism.
In addition, when there is a concern about slipping at the engaging portion, such as when the rotation speed of the vulcanized tire during expansion cooling is high, mechanical relative rotation preventing means for preventing relative rotation between the engaging members. May be provided. As the relative rotation preventing means, a double nut means (not shown) that is fastened together with an adjusting nut 13 (female screw) with respect to the upper rim support 12 (male thread), or a retaining screw that fixes members to be engaged with each other. (Not shown) can be applied.

  In the embodiment according to the present invention, the tire 1 corresponds to the tire, the post inflator 50 corresponds to the post inflator, the upper and lower rims 11, 4, the adjustment nut 13 (female screw), and the thread portion of the upper rim support 12. (Male screw), upper rim support 12, lock sleeve 14, and locking shaft 21 correspond to a tire holding mechanism, upper and lower rims 11, 4 correspond to holding portions, and adjustment nut 13 (female screw) and upper rim support 12 The screw portion (male screw) corresponds to a screw mechanism, the drive motor 26 corresponds to a hydraulic motor, and the brake plate 30a and the brake caliper 30b correspond to a brake (screw fixing mechanism).

  Although the present invention has been described in the above-described preferred embodiment, the present invention is not limited thereto. It will be understood that various other embodiments may be made without departing from the spirit and scope of the invention. Furthermore, in this embodiment, although the effect | action and effect by the structure of this invention are described, these effect | actions and effects are examples and do not limit this invention.

Sectional drawing which shows the structure of the post inflator which concerns on one embodiment of this invention BB sectional view taken on line in FIG. Schematic diagram for explaining the details of the locking mechanism of the post inflator of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tire 1a Upper bead part 1b Lower bead part 2 Main frame 3 Lift beam 4 Lower rim 5 Lower rim support 6 Lower lock member (lock mechanism)
6a Non-rotating pin 7 Connecting pin 8 Lock plate 9 Guide plate 10 Lock cylinder 11 Upper rim 12 Upper rim support (male thread)
13 Adjustment nut (Female thread)
14 Lock sleeve 15 Bearing box 16 Lower bearing 17 Upper bearing 18 Bearing retainer 19 Bearing nut 20 Bolt 21 Locking shaft (locking mechanism)
21a Rotating pin 22 Driven pulley 23 Drive pulley 24 Drive belt 25 Motor bracket 26 Drive motor 27 Air introduction path 28 Rotary joint 30 Disc brake 30a Brake plate 30b Brake caliper 31 Bracket 34 Cylinder 35 Lock pin 36 Spacer 37 Pin

Claims (3)

In a post inflator for inflating and cooling a vulcanized tire sandwiched between a pair of rims,
By rotating a pair of male and female screws that are screwed together, one rim to which the male screw is fixed is moved closer to and away from the other rim in the axial direction of the screw, and a rim according to the bead width of the tire. A lock mechanism that includes a bead width adjustment mechanism that adjusts the width, and that can hold a reaction force of the inflated tire via the pair of rims, and a drive device that can rotate the lock mechanism together with the tire. A screw fixing mechanism whose position is fixed for fixing and releasing the female screw,
The bead width adjusting mechanism is configured such that when the tire type is changed, the screw is fixed by the screw fixing mechanism and the rotation of the female screw is stopped via the lock mechanism. By being transmitted to the male screw, the male screw is rotated relative to the female screw, and the male screw is advanced and retracted in the axial direction with respect to the lock mechanism, whereby the one rim is moved to the other. A post inflator characterized in that the rim width is adjusted by approaching and moving away from the rim. In a post inflator for inflating and cooling a vulcanized tire sandwiched between a pair of rims,
By rotating a pair of male and female screws that are screwed together, one rim to which the male screw is fixed is moved closer to and away from the other rim in the axial direction of the screw, and a rim according to the bead width of the tire. A lock mechanism that includes a bead width adjustment mechanism that adjusts the width, and that can hold a reaction force of the inflated tire via the pair of rims, and a drive device that can rotate the lock mechanism together with the tire. A screw fixing mechanism whose position is fixed to fix and release the male screw,
The bead width adjusting mechanism is configured to transmit the rotation of the driving device to the female screw in a state where the male screw is fixed by the screw fixing mechanism and rotation of the male screw is stopped when the tire type is changed. By rotating the female screw relative to the male screw and moving the male screw forward and backward in the axial direction relative to the locking mechanism, the one rim is brought close to the other rim. A post inflator characterized in that the rim width is adjusted by separating the post inflator. The drive post inflator according to claim 1 or 2, characterized in that it consists of a hydraulic motor.

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