JP2965436B2 - Tire changing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire changing device and, more particularly, to a tire changing device for attaching and detaching a tire to and from a wheel.

[0002]

2. Description of the Related Art Conventionally, attachment and detachment of a tire from a rim of a wheel have been performed by using a tire lever or the like. However, in order to perform the operation easily and in a short time, FIGS. Apparatus as shown is commonly used.

[0003] The tire changing device shown in FIG.
Tire assembly 41 composed of tire 02 and wheel 406
Turntable 4 for supporting coaxially and detachably 0
12 and a base 414 supporting the turntable 412
A support 462 erected at one end of the base 414;
A vertical arm 464 extending from the upper end of the horizontal arm 62 so as to be able to advance and retreat in the horizontal direction; a vertical arm 440 extending from the tip of the horizontal arm 464 so as to be able to advance and retract in the vertical direction;
0 and a bead attaching / detaching member 420 attached to the lower end. For example, when performing the removal work,
A bead remover (not shown) is used to remove the bead 4 of the tire 402.
After the wheels 04 and 405 are dropped into the recess 407 side of the wheel 406 (see FIG. 22), the tire assembly 410 is mounted on the turntable 412, and the tire assembly 410 is fixed to the turntable 412 with the clamp piece 494 provided on the turntable 412. I do. In FIG. 18, the clamp mechanism 4 for moving the clamp piece 494 is shown.
Numeral 90 indicates only the outline.

Next, by moving the horizontal arm 464 in the horizontal direction and the vertical arm 440 in the vertical direction, the claw portion 428 of the bead attaching / detaching member 420 is positioned between the wheels 406 near the outside of the rim 408 (FIG. 19). reference).

At this time, a gap X is placed in the horizontal direction between the claw portion 428 and the rim 408, and a gap Y is placed in the vertical direction. After the positioning is completed in this way, as shown in FIG. 20, the bead 404 of the tire is hooked on the claw portion 428 by the lever 500, and the turntable 412 is rotated. Accordingly, the pawl portion 428 disengages the bead 404 of the tire from the rim 408 of the wheel, and the tire 402 can be removed from the wheel 406 by one rotation.

When the tire is mounted, the wheel 406 is fixed to the turntable 412 and the lower bead 4
05 into the recess 407 of the wheel 406,
The upper bead 404 is connected to the claw portion 42 of the bead attaching / detaching member 420.
8 and a horizontally projecting locking portion 430
(See FIG. 21) and rotate the turntable 412. At this time, the bead 404 guided from the locking portion 430 is pressed downward by the claw portion 428,
The bead 404 and the rim 408 are sequentially fitted, and the tire 402 is mounted on the wheel 406.

[0007]

In recent years, the use of aluminum wheels in place of steel wheels has been increasing in order to reduce the weight of vehicles, and the tires have a flattened cross-sectional shape to increase the tread width, thereby improving running stability and high speed. The use of so-called flat tires having a low flatness ratio for improving durability and wear resistance is increasing.

In such a flat tire, the height of the cross section of the tire is short, and the rigidity of the rubber is also high. For this reason,
The following problems arise when the above-described conventional device is used. That is, when removing, the tire bead 404 is placed on the claw portion 428,
The elastic force of the bead 404 causes the vertical arm 440
Is bent substantially in the direction C in the figure (see FIG. 19), and the inner side wall of the claw portion 428 mainly contacts the outer surface of the rim 408 of the wheel 406, and the outer surface of the rim 408 of the wheel is damaged. there were. This is the bead attaching / detaching member 420
The vertical arm 440, the horizontal arm 464 and the strut 46
This is caused by the cantilever structure which is connected to the base 414 through the base 2. When mounting, since the bead 404 of the tire is hooked on the upper side of the locking portion 430, the vertical arm 440 bends in the direction D in the schematic diagram, and the upper wall inside the claw portion 428 and the rim 408 of the wheel are formed. There has been a problem that the upper surface mainly contacts and damages the upper surface of the rim 408 of the wheel. In particular, aluminum wheels are easily damaged due to their low hardness, and are expensive, so that if they are scratched, the damage will be enormous.

Further, if the gap between the bead attaching / detaching member 420 and the wheel 406 is widened in order to avoid such contact, the bead 404 of the tire is unnecessarily widened and the bead is damaged on the contrary. There was a point.

On the other hand, a structure in which bending and displacement of these members are prevented by increasing the rigidity of the vertical arm, the horizontal arm, the support, and the base can be considered, but such a structure requires a large-scale apparatus. At the same time, there is a problem that it becomes expensive.

Further, when positioning the bead attaching / detaching member 420 near the outside of the rim 408 of the wheel, the vertical arm 440 and the horizontal arm 464 must be moved to perform fine adjustment. Also takes a long time.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the related art, and it is possible to attach and detach a tire to and from a wheel very easily and in a short time without damaging the rim of the wheel or the bead of the tire. It is an object of the present invention to provide a tire changing device that can be used.

[0013]

Therefore, according to the present invention, a table for coaxially supporting a tire assembly including a tire and a wheel, a base for supporting the table, a bead of the tire and a wheel for the wheel are provided. A vertical arm that supports the bead mounting / dismounting member, and a vertical arm that supports the bead mounting / dismounting member; an engaging portion is formed at one end of the vertical arm; and the vertical arm engages with the engaging portion. Displacement prevention means for preventing displacement of the bead is provided at the center of the table, and further, the vertical arm is guided to a position where the engagement portion of the vertical arm engages with the displacement prevention means, and the bead attaching / detaching member is provided. Positioning means for positioning the bead at a position near the rim of the wheel; and the table and the bead mounting / removing member so that the bead mounting / removing member can move along the periphery of the wheel. Employs a configuration that includes a relative-motion applying means for imparting relative motion between, thereby,
It is intended to achieve the above object.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

A tire changing device according to one embodiment of the present invention includes a turntable 12 for coaxially supporting a tire assembly 10 (see FIG. 13) including a tire 2 and a wheel 6, and a base for supporting the turntable 12. Stand 14,
A bead attaching / detaching member 20 for engaging and disengaging the bead 4 of the tire 2 and the rim 8 of the wheel 6; and a vertical arm 40 for supporting the bead attaching / detaching member 20, forming an engaging portion 42 at one end of the vertical arm. The vertical arm 40 is engaged with the engagement portion 42.
Displacement preventing means 140 for preventing displacement of the vertical arm 40 is provided at the center of the turntable 12, and further, the vertical arm 40 is guided to a position where the engaging portion 42 of the vertical arm 40 engages with the displacement preventing means 140, so that the beads can be detached. Positioning means 60 for positioning the member 20 at a position near the rim 8 of the wheel 6, and relative movement between the turntable 12 and the bead attaching / detaching member 20 so that the bead attaching / detaching member 20 can move along the periphery of the wheel 6. And a relative motion imparting means 16 for giving

The turntable 12 is rotatably supported on a base 14, and is driven to rotate by a driving device 16 fixed inside the base 14. As described above, in the present embodiment, the driving device 1 provided inside the base 14 is
6 constitutes a relative motion imparting means. A shaft of the driving device 16 extends through the upper surface of the base 14, and the turntable 12 is fixed to the shaft. Turntable 12
As is well known, a clamp mechanism 90 is attached to the lower surface of the. The air cylinder 9 of the clamp mechanism 90
By the operation of 2, the four clamp pieces 94 provided on the upper surface of the turntable 12 move in the radial direction, and the clamp pieces 94 engage with the lower rim of the wheel 6. Thus, the wheel 6 is fixed on the turntable 12. Then, the clamp mechanism 90 is connected to the turntable 1.
2 and can be rotated. 1 and 3, only the outline of the clamp mechanism 90 is shown.

The positioning means 60 includes a column 62 standing on one end of the base 14, and a horizontal arm 64 extending horizontally from the upper end of the column 62 toward the turntable.

The distal end of the horizontal arm 64 terminates substantially at the center of the turntable 12. A hinge member 70 is fixed to the upper end of the column 62 (see FIG. 2). The hinge member 70 has a side plate 72 attached along the longitudinal direction of the column 62, an upper plate 74 extending in the cross direction from the upper end of the side plate 74, and extends parallel to the upper plate 74 from the lower end of the side plate 74. The lower plate 76 is formed in a U-shape. The respective ends of the side plate 72, the upper plate 74, and the lower plate 76 are fixed to a surface of the support column 62 on the turntable side. The hinge member 70 is provided with a support shaft 78 extending through the upper plate 74 and the lower plate 76. With this support shaft 78, one end of the horizontal arm 64 is connected to the support 62.
Is pivoted to. As a result, the horizontal arm 64 pivots about the support shaft 78 in the horizontal direction.

An arm stopper 79 is attached to the side plate 72 of the hinge member 70. The movement of the horizontal arm 64 toward the turntable is restricted by the arm stopper 79. When the horizontal arm 64 comes into contact with the arm stopper 79, the vertical arm 40 is positioned coaxially with the center of the turntable 12. The arm stopper 79 includes a screw portion 79a screwed to the side plate 72 and extending through the side plate, and a circular operating portion 79b provided at one end of the screw portion 79a. By rotating the operation unit 79b,
The screw part 79a moves in the axial direction of the screw part together with the operation part 79b. The regulating position of the horizontal arm 64 is adjusted by adjusting the distance that the screw portion 79a protrudes from the side plate.

According to the present embodiment, the tire assembly 10 can be easily attached to and detached from the turntable 12 by temporarily moving the horizontal arm 64 in a direction away from the turntable 12.

In this embodiment, the horizontal arm 6
4 is pivotally attached to the column 62, but such a structure is not always necessary, and the horizontal arm 64 is attached to the column 62.
May be fixed. In this case, the arm stopper 79 is unnecessary.

The vertical arm 40 has a hexagonal cross section, and is a long-axis member extending parallel to the support column 62. The vertical arm 40 is vertically movably attached to the distal end of the horizontal arm 64 so as to be located on the same axis as the center of the turntable 12. The bead attaching / detaching member 20 is attached to the lower end side of the vertical arm 40 via the guide device 100. Vertical arm 40
A vertical arm driving device 50 is attached to the upper end side of the motor. By operating this driving device 50,
The vertical arm 40 moves downward toward the turntable 12 or upwards away from the turntable 12. The moving direction of the vertical arm 40 is controlled by the user of the tire changing device.
The driving device 50 for moving the vertical arm 40 toward or away from the turntable 12 or moving it back and forth can be constituted by various known techniques such as hydraulic pressure, pneumatic pressure, etc., and detailed description thereof will be omitted.

In this embodiment, the driving device 50 is mounted, but it is not always necessary to provide such a driving device, and a mechanism for manually moving the vertical arm 40 up and down may be employed.

On the lower surface of the vertical arm 40, a concave portion 42 is formed as an engaging portion. At the center of the turntable 12, a table shaft 13 for rotationally driving the turntable 12 is provided so as to protrude (see FIG. 4). A support member 140 as a conical displacement prevention means is attached to and detached from the table shaft 13. Mounted as possible. Support member 1
A concave portion 142 is formed on the bottom surface of 40, and the concave portion 142 of the support member 140 and the table shaft 13 are rotatably fitted. Top 14 of support member 140
Reference numeral 4 denotes a shape which can be fitted into a concave portion 42 formed on the lower end side of the vertical arm 40. Therefore, the support member 14
When the turntable 12 rotates when the top 144 of the vertical arm 40 and the recess 42 of the vertical arm 40 are fitted, the support member 1
The table shaft 13 does not rotate with respect to the vertical arm 40, and the table shaft 13 rotates within the recess 142 of the support member 140. As described above, since the lower end side of the vertical arm 40 is supported by the support member 140, the vertical arm 40 is hardly displaced even when it receives a force in the radial direction or the downward direction. In this embodiment, since the support member 140 is detachably attached to the table shaft 13, support members having different lengths can be used according to the size of the tire assembly.

In this embodiment, the vertical arm and the support member are fitted by moving the vertical arm in the vertical direction. However, the present invention is not limited to this. By adopting the configuration, the vertical arm can be guided to a position where the fitting portion of the vertical arm fits with the support member, and the bead attaching / detaching member can be positioned at a position near the rim of the wheel. For example, the vertical arm may be fixed to the horizontal arm, the horizontal arm may be fixed to the support, and the support may be configured to be tiltable. The support may be fitted to the vertical arm by tilting the support. Good. Further, this folding structure may be added to this embodiment. Further, the vertical arm may be fixed to the horizontal arm, a part of the fitting portion of the vertical arm may be cut out, and the vertical arm and the support member may be fitted by pivoting the horizontal arm.

The guide device 100 includes a bead attaching / detaching member 20.
Are movably held along the axis of the vertical arm 40 and are movably held in a direction intersecting the axis of the vertical arm 40. The guide device 100 includes a block body 102 slidably attached to the vertical arm 40,
A sliding arm 108 slidably attached to the block body 102.

The block body 102 has a prismatic shape. At a substantially central portion of the block body 102, a vertical arm 40 is provided.
(See FIG. 9). Further, a horizontal hole 106 extending in a direction intersecting the longitudinal direction is formed on one end side of the block body 102 (see FIG. 11). The vertical arm 40 extends through a vertical hole 104 in the block body 102. The block body 102 can slide along the vertical arm 40. Around the vertical arm 40, a coil spring 120 is arranged along the axial direction of the vertical arm 40. The upper end of the coil spring 120 is fixed to the horizontal arm 64, and the lower end thereof is
It is fixed to the upper surface of. The block body 102 is urged toward the horizontal arm 64 by the coil spring 120. Therefore, when positioning the block body 102, the user can easily move the block body 102. At the lower end of the vertical arm 40, a stopper 44 protruding in the radial direction is provided (see FIG. 6).
The downward movement of the block body 102 is restricted by the stopper 44.

The sliding arm 108 extends through the horizontal hole 106 of the block 102 and is slidably attached to the block 102. That is, the sliding arm 108 is movable along the radial direction of the turntable surface. The sliding arm 108 includes an elongated columnar portion 110 that slides on the block body, a protruding portion 112 protruding from one end of the columnar portion 110 in the cross direction, and a stopper 114 provided at the other end of the columnar portion 110. ing. Projection 11
2 and the stopper 114 prevent the sliding arm 108 from coming off the block body 102.

A bead attaching / detaching member 20 is attached to the lower end of the protrusion 112 of the sliding arm 108. The bead attaching / detaching member 20 is the same as that conventionally used. As shown in FIGS. 14 and 15, the bead attaching / detaching member 20 has a curved portion 22 having a substantially curved shape, an attachment portion 24 extending from the upper surface of the curved portion 22 and extending downward, and extending downward from one end of the curved portion 22. The extension portion 26, a claw portion 28 provided at the tip of the extension portion 26, and a locking portion 30 projecting outward in the horizontal direction from the lower end of the curved portion 22 are integrally formed. The mounting portion 24 is provided with the protrusion 112 of the sliding arm 108.
, The bead attaching / detaching member 20 is detachably attached to the sliding arm 108. Since the extending portion 26 of the bead attaching / detaching member 20 extends downward, the claw portion 28 is located closer to the turntable than the locking portion 30. A roller 32 is provided on the inner wall surface of the claw portion 28.
Is rotatably held, and the roller surface of the roller 32 slightly protrudes from the inner wall surface of the claw portion 28 to the rim side of the wheel 6. Therefore, the roller 32 is
The rim 8 of the wheel 6 is brought into contact with the rim 8 prior to the inner wall surface of the rim, so that damage to the rim 8 is reduced as much as possible.
When attaching and detaching the tire 2 to and from the wheel 6, the block body 102 and the sliding arm 108 are moved so that the claw portion 28 is located near the outside of the rim 8 of the wheel 6, and the bead is attached and detached. The positioning of the member 20 is performed.

According to the present embodiment, by providing the guide device 100, the bead attaching / detaching member 20 can be positioned at a desired position on the turntable. Can be attached and detached. If only a tire having a certain size is handled, the bead attaching / detaching member may be directly attached to the vertical arm without providing the guide device as in this embodiment. In this case, if the horizontal arm is fixedly attached to the support, the support 62 can be configured to be tiltable so that the tire assembly can be mounted on the turntable.

As described above, according to the present embodiment, the fine adjustment of the positioning of the bead attaching / detaching device 20 is performed by the movement of the block body 102 with respect to the vertical arm 40 and the movement of the sliding arm 108 with respect to the block body 102. Becomes According to this, compared to the related art, only the small member is moved at the time of fine adjustment, so that positioning can be performed very easily.

In this embodiment, a lock device 200 is further provided. The lock device 200 includes a plate-shaped side lock plate 202 for fixing the block body 102 and the sliding arm 108, and a plate-shaped lower lock plate 22 for fixing the block body 102 and the vertical arm 40.
0, and a drive unit 240 that drives the side lock plate 202 and the lower lock plate 220 between a locked position and an unlocked position.

The side lock plate 202 is attached along the side surface of the block body 102 on the side of the bead attaching / detaching member. The side lock plate 202 is formed with an opening 204 through which the sliding arm 108 holding the bead attaching / detaching member 20 passes (see FIG. 6). The cross-sectional area of the opening 204 is slightly larger than the cross-sectional area of the sliding arm 108. One end of the side lock plate 202 is attached to the block so that play occurs. Specifically, two bolts 2
06 is screwed into the side surface of the block body 102, and the other end of the bolt 206 is connected to the block body 102.
(See FIG. 11). One end of the side lock plate 202 is loosely fitted to the bolt 206. A nut 208 is fitted into the tip of the bolt 206 to prevent the side lock plate 202 from coming off. The distance between the nut 208 and the block body 102 is slightly larger than the thickness of the side lock plate 202. With the above configuration, the side lock plate 20
One end of 2 can move along the bolt 206 between the block body 102 and the nut 208. The other end of the side lock plate 202 extends beyond the block body 102, and an extension 210 extending beyond the block body 102 defines an engagement surface with which the drive unit 240 of the lock device 200 engages. (See FIG. 5). The other end of the side lock plate 202 is attached to the block so as to be urged by the block 102. Specifically, two bolts 212 are loosely fitted into the block body 102 and a spring (not shown) provided inside the block body 102
Accordingly, the bolt 212 is urged toward the block body 102 (see FIGS. 7 and 8). The projecting end of the bolt 212 extends through the other end of the side lock plate 202. Then, the nut 21 is attached to the tip of the bolt 212.
4 prevents the other end of the side lock plate 220 from coming off the bolt 212. The other end of the side lock plate 202 is constantly urged toward the block 102 by a spring (not shown), a bolt 212 and a nut 214 provided inside the block 102.

The lower lock plate 220 is attached to the lower surface of the block body 102 and has an opening 224 through which the vertical arm 40 passes.
reference). The cross-sectional area of the opening 224 is slightly larger than that of the vertical arm 40. The lower lock plate 220 is also substantially similar to the side lock plate 202,
One end of the bolt is attached to the block body 102 by a bolt 226 and a nut 228 fitted to the tip of the bolt so that play occurs. Further, the other end of the lower lock plate 220 extends beyond the block body 102 by the same distance as the side lock plate 202, and the extension 2 extends beyond the block body 102.
30 constitutes an engagement surface that engages with the drive section 240 of the lock device 200. Further, the lower lock plate 22
Similarly to the side lock plate 202, the other end of the block 0 is also urged toward the block body 102 by a bolt 232, a nut 234, and a spring (not shown).

The driving section 240 is provided with the side lock plate 20.
2 and the respective extension 21 of the lower lock plate 220
0 and 230 are provided on the side surface of the block body 102. The drive section 240 includes an arcuate plate cam 242 partially cut away, and an elongated locking operation lever 250. The plate cam 242 has a straight contour portion 244.
And an arc-shaped contour portion 246, and a corner portion 24 between the linear contour portion 244 and the arc-shaped contour portion 246.
5, 247 are formed. The plate cam 242 is
8, it is rotatably attached to the side surface of the block body 102. One end of the operation lever 250 is a plate cam 2
42 is fixed to the outer surface. On the other end side of the operation lever 250, a spherical grip 25 is provided so that the user can easily operate it.
2 are provided. The user is required to hold the operating lever 2
By rotating the plate 52, the plate cam 242 is driven to rotate. When the lock device 200 is in the unlocked position,
The straight contour 244 is adjacent to the extension 210 of the side lock plate 202 (see FIG. 8).

When the operating lever 250 is moved in the direction of arrow A in the figure (see FIG. 8), the corner 245 of the plate cam 242 and the arcuate contour 246 in the vicinity thereof gradually become the extension 210 of the side lock plate, respectively. , And the extension of the side lock plate is pressed in the horizontal direction. On the other hand, the plate cam 2
42 corner 247 is the lower lock plate extension 230
And the extension 230 of the lower lock plate is pressed downward. As described above, one end sides of the side and lower lock plates 202 and 220 are attached to the block body 102 with play. Therefore,
The rotation of the plate cam 242 causes the side and lower lock plates 202 and 220 to rotate about one end thereof in a direction in which the other end is separated from the block body 102. That is, the side lock plate 202 moves from the crossing state to the non-crossing state with respect to the sliding arm 108, and moves from the parallel state to the inclined state with respect to the block body 102 (see FIG. 6). Similarly, the lower lock plate 220 moves from the crossing state to the non-crossing state with respect to the vertical arm 40, and moves from the parallel state to the inclined state with respect to the block body 102 (see FIG. 9). As a result, the peripheral portions forming the openings 204 and 224 formed in the side and lower lock plates 202 and 220 respectively are moved to the sliding arms 10.
8 and the vertical arm 40, the sliding arm 108 is fixed to the block 102, and the block 102
Are fixed to the vertical arm 40 and are locked. When the operation lever 250 is moved in the direction of arrow B in the figure (see FIG. 7), the locked state is changed to the unlocked state. That is,
The pressure contact between the corners 245 and 247 of the plate cam 242 and the extensions 210 and 230 of the side and lower lock plates is gradually released, and the extensions 21 and 21 of the side and lower lock plates are released.
0 and 230 are urged toward the block body, and the other end sides of the side and lower lock plates 202 and 220 abut on the block body 102. Thus, when the lock state is established, the sliding arm 108 can be moved with respect to the block body 102, and the block body 102 can be moved with respect to the vertical arm 40.

When the plate cam 242 is moved to move the side and lower lock plates 202 and 220 from the unlocked position to the locked position, the periphery of the opening 204 of the side lock plate 202 and the sliding arm 108 are moved. Since the side lock plate 202 moves while being pressed, the sliding arm 108 slightly moves radially outward with the movement of the side lock plate 202. Similarly, since the side lock plate 202 moves while the peripheral edge of the opening 224 of the lower lock plate 220 and the vertical arm 40 are pressed against each other, the peripheral edge of the side lock plate 202 and the vertical arm 4 are moved.
After the pressure contact with zero is sufficiently ensured, the block body 102 relatively slightly moves upward. At this time, the horizontal movement distance of the sliding arm 108 is the horizontal gap between the claw portion 28 and the rim 8 when the tire 2 is attached to or detached from the wheel 6 as described in the related art. X (see FIG. 19). The upward moving distance of the block body 102 is set to be equal to the vertical gap Y (see FIG. 19) between the claw portion 28 and the rim 8 described in the related art. That is, in the present embodiment, the claw portions 28
When a predetermined portion of the tire 2 is brought into contact with the rim 8 of the wheel 6 and then locked by the lock device 200, a gap between the claw portion 28 and the rim 8 necessary for attaching and detaching the tire 2 to and from the wheel 6 is obtained. Is automatically set. Therefore, the positioning of the claw 28 is
It can be performed easily and in a short time.

As described above, according to this embodiment, the block body 102 is fixed to the vertical arm 40 by operating the operation lever 250 with one hand, and
8 is fixed to the block body 102. Further, the positioning of the bead attaching / detaching member 20 can be performed at the same time.

In this embodiment, the lock device 200 is manually operated. However, the lock device may be automatically driven by using air pressure, hydraulic pressure, or the like. Further, as described above, when the guide device is not employed, it is not necessary to provide such a lock device.

Next, the work of attaching and detaching the tire 2 to and from the wheel 6 will be specifically described.

At the time of removal work, first, the horizontal arm 64 is once moved in a direction away from the turntable 12 in order to easily attach the tire assembly 10 to the turntable 12. After the bead of the tire is dropped into the concave portion of the wheel by a bead dropper (not shown), the tire assembly 10 is mounted on the turntable 12, and the tire assembly 10 is clamped by the clamp piece 94 provided on the turntable 12. Fixed to. Next, the horizontal arm 64 is moved to the turntable side until it comes into contact with the arm stopper 79 attached to the hinge member 70. When the movement of the horizontal arm 64 is restricted by the arm stopper 79, the vertical arm 4
0 is placed directly above the support member 140 loosely fitted on the table shaft 13 of the table 12. Then, the vertical arm driving device 50 is operated to move the vertical arm 40 downward toward the turntable 12. At this time, the concave portion 42 formed on the lower surface of the vertical arm 40 is
Automatically fits on top 144 of After the vertical arm 40 and the support member 140 are fitted in this way, the guide device 100 is moved to position the bead attaching / detaching member 20. Specifically, the block body 102 is connected to the vertical arm 4
By moving on zero, positioning in the height direction is performed. The positioning in the radial direction is performed by moving the sliding arm 108 in the horizontal direction. In this way, by finely adjusting the positions of the block body 102 and the sliding arm 108, the claw portion 28 is moved to a position where it comes into contact with the rim 8 of the wheel 6.

Thereafter, by rotating the lock operation lever 250, the vertical arm 40 and the block 102 are rotated.
And the fixing of the sliding arm 108 and the block body 102 are performed simultaneously. At the same time as such locking is performed, a gap between the claw portion 28 and the rim 8 necessary for removing the tire from the wheel is automatically set.

After the positioning is completed as described above, FIG.
As shown in (2), the bead 4 of the tire 2 is hooked on the claw portion 28 by the lever 300, and the driving device 16 provided inside the base 14 is operated to rotate the turntable 12 in the direction P in the figure. At this time, the table shaft 13 is rotating inside the concave portion 142 of the support member 140, and the support member 140 supports the lower end of the vertical arm 40 without rotating with respect to the vertical arm 40. By the rotation of the turntable 12, the claw portion 28 moves along the periphery of the rim 8 of the wheel 6,
The bead 4 of the tire 2 is gradually pulled away from the rim 8 of the wheel 6. At this time, the bead attaching / detaching member 20 is
Of the vertical arm 40 is supported by the support member 140, so that the vertical arm 40, the horizontal arm 64, and the column 62 are supported.
Does not bend or displace. Therefore,
The gap set between the claw portion 28 and the rim 8 is kept constant, and the rim of the wheel is not damaged as in the prior art.

The sliding arm 108 supporting the bead attaching / detaching member 20 has a cantilever structure.
Since the distance extending from 2 is short and rigid, the sliding arm 108 itself is not likely to bend. If there is a possibility that excessive force may be applied to the bead attaching / detaching member 20 such as a super-flat tire, if the rigidity of the sliding arm 108 is ensured, the setting between the claw portion 28 and the rim 8 is possible. The maintained gap can be kept constant. Therefore, it is not necessary to increase the size of the entire tire changing device in order to increase the rigidity of the vertical arm, the horizontal arm, and the support. In addition, there is no fear of displacement as described above,
Since it is not necessary to make the gap set between the claw portion 28 and the rim 8 more than necessary, the bead 4 of the tire 2 is not damaged. That is, according to the present embodiment, the bead of the tire can be easily removed from the rim of the wheel without damaging the rim of the wheel or the bead of the tire.

When installing the tire, the wheel 2 is fixed to the turntable 12, the claw portion 28 is positioned, and the lower bead is dropped into the concave portion of the rim. Thereafter, similarly to the above-described case, the bead 4 of the tire 2 is hung on the locking portion 30 of the bead attaching / detaching member 20, and the turntable 12 is rotated in the Q direction in the drawing, so that the locking portion 30 is formed.
Is guided downward by the claw portion 28, and the bead 4 and the rim 8 are fitted in order, and the tire is assembled to the wheel (see FIG. 17). Also at this time, the lower end side of the vertical arm 40 is supported by the support member 140 and does not bend or displace.
Of the wheel 6 with the rim 8 of the wheel 6 can be prevented.

In the above embodiment, the support member is used as the displacement preventing means, but the table shaft may be used as the displacement preventing means. That is, the fitting portion of the vertical arm may be fitted to the table shaft.

In the above embodiment, the support member is rotatably mounted on the table shaft. However, the support member is mounted on the table shaft so as to be fixed, and the support member and the engaging portion of the vertical arm are connected to each other. It is also possible to provide a slide bearing between the support members and a structure capable of rotating and sliding between the support member and the engagement portion.

Further, the portion constituting the concave portion of the vertical arm may be rotatably attached to the vertical arm.

In the above embodiment, the top of the support member is formed in a convex shape, and the engaging portion of the vertical arm is formed in a concave shape. However, the top of the support member is formed in a concave shape, and the engaging portion of the vertical arm is formed. It may be formed in a convex shape.

Further, the table shaft provided at the center of the turntable is fixed to the lower surface of the turntable without projecting from the table surface, a recess is formed in the center of the table, and the lower end of the vertical arm is connected to the lower end. You may make it fit with a recessed part. At this time, the engaging portion of the vertical arm may be formed in a convex shape. The convex engaging portion may be provided rotatably with respect to the vertical arm.

In the above-described embodiment, the drive device is provided inside the base to rotate the turntable. However, the turntable is fixed so as not to rotate with respect to the base, and the bead attaching / detaching member is rotated. It may be driven.

In the above embodiment, the guide device,
Although the lock device and the bead attaching / detaching member are attached to the vertical arm, they may be configured to be detachably attached to the support member.

[0053]

As described above, according to the present invention, since the displacement preventing means for preventing the displacement of the vertical arm is provided, when the bead attaching / detaching member attaches / detaches the rim of the wheel and the bead of the tire, Since the vertical arm is not displaced and the gap set between the bead attaching / detaching member and the rim of the wheel is kept constant, there is an effect that the rim of the wheel and the bead of the tire are not damaged.

According to the eighteenth aspect of the invention, fine adjustment of the positioning of the bead attaching / detaching device is performed by moving the block body with respect to the vertical arm and moving the sliding arm with respect to the block body. Positioning can be performed very easily in comparison.

[Brief description of the drawings]

FIG. 1 is a perspective view of the entire structure of the present embodiment in a state where a vertical arm and a support member are separated from each other.

FIG. 2 is a perspective view of a horizontal arm portion.

FIG. 3 is a perspective view of the entire structure in a state where a vertical arm and a support member are fitted.

FIG. 4 is a perspective view of a turntable part.

FIG. 5 is a perspective view showing a state where the lock device is locked in a state where the tire assembly is not mounted on the turntable.

FIG. 6 is a perspective view showing a state where the lock device is locked with the tire assembly mounted on the turntable.

FIG. 7 is a right side view of the lock device in a locked state.

FIG. 8 is a right side view of the lock device in an unlocked state.

FIG. 9 is a rear view of the lock device in a locked state.

FIG. 10 is a rear view of the lock device in an unlocked state.

FIG. 11 is a left side view of the lock device in a locked state.

FIG. 12 is a left side view of the lock device in an unlocked state.

FIG. 13 is a perspective view showing a state in which a bead attaching / detaching member is positioned on a rim of a wheel.

FIG. 14 is a front view of FIG. 13;

FIG. 15 is a rear view of the bead attaching / detaching member.

FIG. 16 is a perspective view showing a state in which a bead of a tire is detached from a rim of a wheel.

FIG. 17 is a perspective view showing a state in which a bead of a tire is attached to a rim of a wheel.

FIG. 18 is a perspective view of a conventional tire changing device.

FIG. 19 is a side view showing a state in which a bead attaching / detaching member is positioned on a rim of a wheel in a conventional tire changing device.

FIG. 20 is a perspective view showing a state in which a bead of a tire is removed from a rim of a wheel in a conventional tire changing device.

FIG. 21 is a front view of a bead attaching / detaching member in a conventional tire changing device.

FIG. 22 is a partial cross-sectional view showing a state where a bead of a tire is dropped into a concave portion of a wheel.

[Explanation of symbols]

Reference Signs List 2 tire 4 bead 6 wheel 8 rim 10 tire assembly 12 turntable 13 table shaft 14 base 16 drive device 20 bead attachment / detachment member 28 claw portion 30 locking portion 40 vertical arm 42 vertical arm recess 60 positioning means 62 support 64 horizontal arm REFERENCE SIGNS LIST 100 guide device 102 block body 108 sliding arm 140 support member 142 recess of support member 144 top 200 lock device 202 side plate 220 lower plate 240 drive unit 242 plate cam 250 operating lever for locking

────────────────────────────────────────────────── (5) Continuation of the front page (56) References JP-A-2-223842 (JP, A) JP-A-62-88602 (JP, A) JP-A-6-199119 (JP, A) JP-A-5-1990 58123 (JP, A) JP-A-6-270619 (JP, A) JP-A-63-195008 (JP, A) JP-A-63-247105 (JP, A) JP-A-4-341835 (JP, A) Japanese Utility Model Application Hei 5-80809 (JP, U) Japanese Patent Publication No. Hei 2-26402 (JP, B2) (58) Field surveyed (Int. Cl. ⁶ , DB name) B60C 25/00-25/15

Claims (21)

(57) [Claims] 1. A table for coaxially supporting a tire assembly including a tire and a wheel, a base for supporting the table, a bead attaching / detaching member for engaging and disengaging a bead of the tire and a rim of the wheel, A vertical arm that supports the bead attaching / detaching member, an engagement portion is formed at one end of the vertical arm, and a displacement prevention unit that engages with the engagement portion to prevent displacement of the vertical arm, Provided at the center of the table, further guiding the vertical arm to a position where the engaging portion of the vertical arm engages with the displacement preventing means, and positioning the bead attaching / detaching member at a position near the rim of the wheel. Positioning means; and a relative movement imparting means for providing relative movement between the table and the bead mounting / dismounting member so that the bead mounting / dismounting member can move along the periphery of the wheel. Means, wherein the displacement preventing means comprises a support member extending upward from the center of the table, so that the engaging portion of the vertical arm and the support member can be fitted to each other. The tire changing device according to claim 1, wherein the engagement portion of the vertical arm can be fitted to the support member by the guide of the positioning means. 2. The tire changing device according to claim 1, wherein the support member is rotatably attached to an axis of the table. 3. The tire changing device according to claim 1, wherein the support member is rotatably and detachably attached to a shaft of the table. 4. The tire changing device according to claim 1, wherein a portion between the support member and the engaging portion of the vertical arm is freely slidable. 5. The tire changing device according to claim 1, wherein the engaging portion is provided rotatably with respect to the vertical arm. 6. The tire changing device according to claim 1, wherein a top portion of the support member is formed in a convex shape, and the engaging portion of the vertical arm is formed in a concave shape. A tire changing device characterized by the above-mentioned. 7. The tire changing device according to claim 1, wherein a top portion of the support member is formed in a concave shape, and the engaging portion of the vertical arm is formed in a convex shape. A tire changing device characterized by the above-mentioned. 8. The tire changing device according to claim 1, wherein the displacement preventing means includes a concave portion formed in a center portion of the table, and the engaging portion of the vertical arm and the concave portion can be fitted. A tire changing device characterized by the above-mentioned. 9. The tire changing device according to claim 8, wherein the engaging portion of the vertical arm is formed in a convex shape. 10. The tire changing device according to claim 9,
A tire changing device, wherein the convex engaging portion is provided rotatably with respect to the vertical arm. 11. The tire changing device according to claim 1, wherein the positioning means includes a vertical arm driving means for moving the vertical arm toward and away from the table. 12. The tire changing device according to claim 1, wherein the positioning means includes a support erected on one end of the base and a horizontal arm extending in parallel with the table from a tip end of the support. A tire changing device, comprising: a vertical arm slidably held at a distal end side of the horizontal arm. 13. The tire changing device according to claim 12, wherein the horizontal arm is attached to the support so as to be able to pivot on a plane parallel to the table. 14. The tire changing device according to claim 13, wherein a stop member for stopping the pivoting of the horizontal arm is attached to the column when the vertical arm is located on the same axis as the center of the table. A tire changing device characterized by the above-mentioned. 15. The tire changing device according to claim 1,
A tire changing device, wherein the relative motion imparting means comprises a device for driving the table to rotate. 16. The tire changing device according to claim 1, wherein
The tire exchanging device, wherein the relative motion applying means comprises a device for driving the bead attaching / detaching member to rotate. 17. The tire changing device according to claim 1, wherein the bead attaching / detaching member is movably held along an axis of the vertical arm and movably held in a direction intersecting with the axis of the vertical arm. A tire changing device, further comprising a guiding device for performing the operation. 18. The tire changing device according to claim 17, wherein the guide device includes a block body slidably attached to the vertical arm, and a slide arm slidably attached to the block body. The tire changing device, wherein the sliding arm is movable in a direction crossing an axis of the vertical arm, and the bead attaching / detaching member is attached to one end of the sliding arm. 19. The tire changing device according to claim 18, wherein a means for preventing the sliding arm from coming off from the block body is provided on the other end side of the sliding arm. 20. The tire changing device according to claim 18, further comprising: urging means for urging the block body in a direction away from the table. 21. The tire changing apparatus according to claim 18, wherein the block body and the vertical arm are fixed.
A tire changing device comprising a lock means for fixing the block body and the sliding arm.