JP2944413B2 - 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 carried out by using a tire lever or the like. 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 dropping the tires 04 and 405 into the recess 407 side of the wheel 406 (see FIG. 25), 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. 21, the clamp mechanism 4 for moving the clamp piece 494
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 vicinity of the outside of the rim 408 of the wheel 406 (FIG. 22). 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 as described above, as shown in FIG. 23, 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. 24), and the turntable 412 is rotated. 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. 22), 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. And a bead attaching / detaching member movably held along the axis of the vertical arm and movably held in a direction intersecting the axis of the vertical arm. A guide device, wherein the guide device has a block body slidably attached to the vertical arm, and a slide arm slidably attached to the block body. The arm is movable in a direction intersecting the axis of the vertical arm, and the bead attaching / detaching member is attached to one end of the sliding arm, and fixes the block body and the vertical arm in a locked position. A first lock member to be released at a non-lock position, a second lock member to fix the block body and the sliding arm at a lock position, and to release at a non-lock position; A lock driving device for driving the lock member and the second lock member between a lock position and a non-lock position, wherein the lock drive device presses the first lock member to unlock the second lock member. A first pressing device for moving from a lock position to a lock position, a second pressing device for pressing the second lock member to move from an unlocked position to a locked position, the first pressing device, and the second pressing device. The present invention employs a configuration in which an actuator for automatically and controllably driving the second pressing device is provided, thereby achieving the above object.

The present invention also provides a table for coaxially supporting a tire assembly including a tire and a wheel, a base for supporting the table, and a bead for engaging and disengaging a bead of the tire and a rim of the wheel. Displacement prevention, comprising: a detachable member, and a vertical arm supporting the bead detachable member, wherein an engagement portion is formed at one end of the vertical arm, and the vertical arm is engaged with the engagement portion to prevent displacement of the vertical arm. Means are provided at the center of the table, and further, the vertical arm is guided to a position where the engaging portion of the vertical arm engages with the displacement preventing means, and the bead attaching / detaching member is located near the rim of the wheel. Positioning means for positioning in position, and providing relative movement between the table and the bead mounting / dismounting member so that the bead mounting / removing member can move along the periphery of the wheel. A relative motion imparting means, and a guide device for holding the bead attaching / detaching member movably along an axis of the vertical arm and movably holding the bead attaching / detaching member in a direction intersecting with the axis of the vertical arm. The guide device includes a block body slidably attached to the vertical arm, and a slide arm slidably attached to the block body, wherein the slide arm is provided on the vertical arm. The bead attaching / detaching member is attached to one end of the sliding arm, fixes the block body and the vertical arm in a locked position, and is released in an unlocked position. A first lock member, a second lock member for fixing the block body and the sliding arm at a lock position, and releasing the lock member at an unlock position, the first lock member, and the second lock member. A lock driving device for driving the lock member between a lock position and a non-lock position, wherein the lock drive device simultaneously presses the first lock member and the second lock member. The above object is achieved by adopting a configuration in which a pressing device for moving the pressing device from the unlocked position to the locked position and an actuator for automatically and controllably driving the pressing device are provided. is there.

[0015]

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

A tire changing apparatus 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 erected at 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 can be supported by the support member 140, there is almost no displacement even when a force is applied in a radial direction or a 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 the present 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 prism 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 serves as a second lock member that fixes the block body 102 and the sliding arm 108 at the lock position and releases the lock member at the unlock position.
Flat side lock plate 202; block body 10
A flat lower lock plate 220 as a first lock member for fixing the second arm and the vertical arm 40 in the lock position and releasing the vertical arm 40 in the unlock position; locking the side lock plate 202 and the lower lock plate 220 with each other; A drive 240 for driving between a 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 operation 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). That is, the side lock plate 202 moves from the unlocked position to the locked position. 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). That is, the lower lock plate 220 also moves from the unlocked position to the locked position. This causes the peripheral edges forming the openings 204, 224 formed in the side and lower lock plates 202, 220, respectively, to slide into the sliding arms 108.
And the sliding arm 108 is fixed to the block body 102 by pressing against the vertical arm 40, and the block body 102 is fixed to the vertical arm 40 to be in a locked state. 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 side and lower lock plates 202, 220 are moved from the unlocked position to the locked position by moving the plate cam 242, the peripheral edge 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. 22). The upward movement distance of the block body 102 is set to be equal to the vertical gap Y (see FIG. 22) 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 the present 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 the present embodiment, the lock device 200 is manually operated.
The drive of the lock device may be automatically performed by using 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.

In the work of removing, first, the horizontal arm 64 is temporarily 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 the tire is assembled, 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.

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 at the center of the table, and the lower end of the vertical arm is connected to the lower end of the turntable. 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 thereby 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.

In the above embodiment, the locking device 200
Is manually driven, but a lock drive device 310 that automatically drives the lock device can be used as shown in FIG. Note that the same components as those in the above embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

The locking drive device 310 presses the side plate lock plate 202 and the lower lock plate 220 simultaneously to move them to the lock position, and a controllably pumping fluid to drive the press device 312. And a pressure feeding device 314 as an actuator that performs the operation.

The pressing device 312 is slidably mounted on the block body and is engageable with the side plate lock plate 202 and the lower lock plate 220, and engages with the fluid from the pressure feeding device 314. The member 316 is pressed, and the side plate lock plate 202 and the lower lock plate 220 are pressed.
And a pressing portion 318 for simultaneously moving the lock position to the lock position.

The engaging member 316 has a thin plate shape.
It is supported by the support member 320 on the side of the block body 102. The engagement member 316 is connected to the side lock plate 20.
A second abutting end 316a abutting on the second extension 210;
The lower lock plate 220 includes a lower contact end 316b that contacts the extension 230 of the lower lock plate 220, and a pressure receiving end 316c that is pressed by the pressing portion 318. Further, the engaging member 3
The slot 16 has an elongated hole 316d along the pressing direction of the pressing portion.

The support member 320 is provided for the block body 102.
Is provided with a shaft portion 320a that rises and extends from a side of the engaging member 316 via a long hole 316d of the engaging member 316. One end of the shaft 320a is fixed to the block body. The diameter of the shaft portion 320a is smaller than the diameter of the elongated hole 316d in the width direction. Thereby, the engaging member 316 can move along the long hole 316d while being supported by the shaft portion 320a. The other end of the shaft portion 320a, that is, the top portion,
A head 320b larger than the diameter in the width direction of 6d is provided. Thereby, the support member 320 of the engagement member 316
Is prevented from coming off.

The pressing portion 318 is held by the block body 102 via the bracket 322. The bracket 322 has a substantially L-shaped cross section from the base end portion 322a and the holding portion 322b. One end of the base end 322a is fixed to an end of the block 102 on the back side surface. That is, the base end 322a extends from the block body 102 in parallel along the direction in which the sliding arm 108 moves. The holding portion 322b extends upright from the other end of the base end portion 322a. That is, the holding portion 322b extends in parallel along the longitudinal direction of the block body 102. The upper part of the holding part 322b in the figure forms a bent part 322c bent with respect to the lower part. The bent portion 322c is opposed to the pressure receiving end 316c of the engaging member 316 in a parallel state.

The pressing portion 318 is fixedly attached to the bent portion 322c of the bracket 322. The pressing portion 318 includes an annular pedestal 318a, and a dome-shaped moving member 318b attached to the pedestal 318a so as to be able to advance and retreat.
And The pedestal 318a is provided with a cylinder (not shown) that protrudes by receiving the fluid pumped from the pumping device 314, and the movement of the moving member 318b toward the engaging member 316 by the protrusion of the cylinder. ing.

The pumping device 314 includes a tank 324 for storing a fluid pumped by a fluid pump (not shown),
Pipe 3 for guiding fluid from tank 324 to pressing portion 318
26, and a control valve 328 for controlling the pumping of the fluid from the tank 324. By opening the control valve 328, the fluid is pressure-fed to the pressing portion 318 and the moving member 31
8b presses the pressure receiving end 316c of the engagement member 316.
Thus, the engagement member 316 moves in the direction A in FIG. 18 while being supported by the support member 320, and presses the side lock plate 202 and the lower lock plate 220 toward the lock position. On the other hand, when the pressing of the moving member 318b is released by closing the control valve 328, the side lock plate 202 and the lower side The lock plate 220 returns to the unlocked state shown in FIG. As the fluid of the pumping device 314, oil, air, or the like can be used. However,
The present invention is not limited to this, and a solenoid, an electric motor, or the like may be employed as the actuator. As described above, in the second embodiment, since the locking and the unlocking can be automatically performed, the positioning of the bead attaching / detaching member can be performed in a short time without imposing a great burden on the operator, and the tire can be further reduced. Exchange can be easily performed.

In the second embodiment, the engagement member 31
6 is movably mounted on the block body 102, as shown in FIG.
As shown in FIG. 9, the thin plate-shaped second transmission member 330 is fixedly attached to the side lock plate 202,
The thin plate-shaped first transmission member 332 is fixedly attached to the lower lock plate 220, and is moved by the moving member 318b.
The second transmission member 330 and the first transmission member 332 may be simultaneously pressed to move the side lock plate 202 and the lower lock plate 220 to the lock position at the same time. Also, if instead of the dome-shaped moving member 318b shown in FIG. 18, an arrow-shaped moving member 318c shown in FIG. 20 is adopted, the moving member directly connects the side lock plate 202 and the lower side. The lock plate 220 and the lock plate 220 can be simultaneously moved to the lock position. However, the shape of the moving member is not limited to this arrow shape, and various shapes such as a T-shape can be adopted.

In each of the above embodiments, the side lock plate 202 and the lower lock plate 220 are driven by one pressing portion, so that the number of parts can be reduced and the cost can be reduced. it can. However, the invention of the present application is not limited to this, and a side pressing portion for a side lock plate and a lower pressing portion for a lower lock plate are provided so that locking and unlocking are performed respectively. You may. At this time, if the size of the pressing portion restricts the location, if the side pressing portion and the lower pressing portion are shifted along the longitudinal direction of the block body 102, the side locking plate and the lower locking plate are shifted. Can be arranged so as to be pressed. When the side pressing portion and the downward pressing portion are employed, a tank and a control valve for the side pressing portion and a tank and a control valve for the downward pressing portion may be provided. Alternatively, the tank and the control valve are made common, the pipe downstream of the control valve is branched, one of the branched pipes is connected to the side pressing portion, and the other pipe is connected to the lower pressing portion. You may.
With this configuration, by controlling one control valve, the side pressing portion and the downward pressing portion can be driven simultaneously.

[0064]

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 first aspect of the present invention,
A first lock member for fixing the block body and the vertical arm at the lock position and releasing at the unlock position, a second lock member for fixing the block body and the slide arm at the lock position and releasing at the unlock position; A first pressing device that presses the first lock member to move to the lock position, a second pressing device that presses the second lock member to move to the lock position, and the first and second pressing devices. Since the actuator for automatically driving the pressing device is provided, there is an effect that the positioning of the bead attaching / detaching member can be performed in a short time without placing a great burden on the operator.

Further, according to the second aspect of the present invention, since the pressing device for simultaneously pressing the first lock member and the second lock member and moving to the lock position is provided, the pressing device is constituted. In addition, the number of parts required for the operation can be reduced, and an effect that an inexpensive product can be provided is also achieved.

[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 side view showing a second embodiment of the driving portion for driving the lock device.

FIG. 19 is a side view showing a third embodiment of the driving portion for driving the lock device.

FIG. 20 is a side view showing a fourth embodiment of the driving portion for driving the lock device.

FIG. 21 is a perspective view of a conventional tire changing device.

FIG. 22 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. 23 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. 24 is a front view of a bead attaching / detaching member in a conventional tire changing device.

FIG. 25 is a partial cross-sectional view showing a state in which a bead of a tire is dropped into a concave portion of a wheel.

DESCRIPTION OF SYMBOLS 2 tire 4 bead 6 wheel 8 rim 10 tire assembly 12 turntable 13 table shaft 14 base 16 drive device 20 bead attaching / detaching member 28 claw portion 30 locking portion 40 vertical arm 42 vertical arm concave portion 60 positioning means 62 Support 64 Horizontal arm 100 Guide device 102 Block body 108 Sliding arm 140 Support member 142 Depression of support member 144 Top 200 Lock device 202 Side lock plate 220 Lower lock plate 240 Drive unit 242 Plate cam 250 Lock operation lever 310 Lock Drive device 312 pressing device 314 pumping device 316 engaging member 316a side contact end 316b lower contact end 316c pressure receiving end 316d long hole 318 pressing portion 318a pedestal 318b moving member 318c moving Member 320 Support member 320a Shaft section 320b Head section 322 Bracket 322a Base end section 322b Holding section 322c Bend section 324 Tank 326 Pipe 328 Control valve 330 Second transmission member 332 First transmission member

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-7-1930 (JP, A) JP-A-63-195007 (JP, A) JP-A-1-317816 (JP, A) JP-A 61-195 81806 (JP, A) Japanese Utility Model 7-4105 (JP, U) Japanese Utility Model 4-135803 (JP, U) Japanese Utility Model 1-109409 (JP, U) Japanese Utility Model 58-142102 (JP, U) JP-B-45-34284 (JP, B1) (58) Field surveyed (Int. Cl. ⁶ , DB name) B60C 25/05-25/138

Claims (5)

(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, and a guide device for holding the bead attaching / detaching member movably along an axis of the vertical arm and movably holding the bead attaching / detaching member in a direction intersecting with the axis of the vertical arm. A block body slidably attached to the vertical arm, and a sliding arm slidably attached to the block body, wherein the sliding arm is arranged with respect to an axis of the vertical arm. A bead attaching / detaching member attached to one end of the sliding arm, fixing the block body and the vertical arm at a lock position, and releasing the bead at a non-lock position; A lock member, a second lock member for fixing the block body and the sliding arm at a lock position and releasing the lock member at a non-lock position, the first lock member and the second lock A locking drive device for driving the member between a locked position and an unlocked position, wherein the locking drive device presses the first lock member and moves the first lock member from the unlocked position to the locked position. A first pressing device, a second pressing device for pressing the second lock member to move from the unlocked position to the locked position, and the first pressing device and the second pressing device automatically. A tire changing device, comprising: an actuator for controllably driving. 2. A table for coaxially supporting a tire assembly comprising 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, and a guide device for holding the bead attaching / detaching member movably along an axis of the vertical arm and movably holding the bead attaching / detaching member in a direction intersecting with the axis of the vertical arm. A block body slidably attached to the vertical arm, and a sliding arm slidably attached to the block body, wherein the sliding arm is arranged with respect to an axis of the vertical arm. A bead attaching / detaching member attached to one end of the sliding arm, fixing the block body and the vertical arm at a lock position, and releasing the bead at a non-lock position; A lock member, a second lock member for fixing the block body and the sliding arm at a lock position and releasing the lock member at a non-lock position, the first lock member and the second lock A locking drive device for driving the member between a locked position and a non-locked position, wherein the locking drive device simultaneously presses the first lock member and the second lock member to unlock the member. A tire changing device comprising: a pressing device that moves from a lock position to a lock position; and an actuator that automatically and controllably drives the pressing device. 3. The tire changing device according to claim 1, wherein the actuator comprises a pumping device that pumps a fluid in a controllable manner. 4. The tire changing device according to claim 2, wherein the pressing device is engageable with the first lock member and the second lock member slidably mounted on the block body. A tire engaging member, and a pressing member that presses the engaging member to simultaneously move the first lock member and the second lock member to a lock position. apparatus. 5. The tire changing device according to claim 2, wherein the pressing device is fixed to the first lock member and the first transmission member fixed to the first lock member. And the second transmission member and the first and second transmission members are simultaneously pressed to simultaneously move the first and second lock members to the lock position. And a pressing member for causing the tire to be changed.