JP6845279B2 - Tire gripping device - Google Patents

Description

The present invention relates to a tire gripping device mounted on a tire changing device that removes a tire from a tire-mounted wheel on which an automobile tire is mounted and mounts the tire on a tire-mounted wheel that is not fitted with a tire.

Conventionally, it is difficult to manually remove a highly rigid tire, which is also called a flat tire, from the wheel or attach it to the wheel. Therefore, a tire changing device also called a tire changer or a tire changing machine has been used. .. Such a tire changing device is disclosed in, for example, Patent Document 1.

This prior art tire changer comprises a turntable having a chuck that is rotationally driven around a vertical axis of rotation, on which the tire-mounted wheel or tire mounted on the wheel is mounted on the wheel. It is configured to mount the unmounted tire on the wheel in a sideways position, and with the lower rim of the wheel gripped by the chuck, attach the tire to the wheel and remove the tire from the wheel. There is.

Japanese Unexamined Patent Publication No. 6-255328

In the prior art described in Patent Document 1 described above, the operator must manually raise and lower the tire-attached wheel, the tire-unattached wheel, and the tire alone on the chuck portion on the turntable. There is a problem that it requires a lot of labor.

An object of the present invention is to provide a tire gripping device capable of reducing the labor of raising and lowering tires and wheels to an operator and improving the efficiency of the tire changing work by the tire changing device.

The present invention is a wheel including a rim portion on which a bead portion of a tire is seated and a disc portion having a hub portion having a hub hole formed, for removing the tire from the wheel or attaching the tire to the wheel. In the tire gripping device provided in the tire changing device
A chuck portion that fits into the hub hole of the wheel and grips the wheel detachably.
A rotation drive unit that is connected to the chuck unit and rotates the chuck unit around a predetermined rotation axis.
At the height position of the hub hole of the wheel arranged in an upright position on the floor surface, the rotation drive unit is moved from an overturning position where the predetermined rotation axis is horizontal to an upright position where the predetermined rotation axis is vertical. The tire gripping device is characterized by including a tilting drive unit that is angularly displaced around a horizontal angular displacement axis in a first direction toward which the vehicle is directed and a second direction from the upright position to the overturned position.

Further, in the present invention, the predetermined rotation axis and the angular displacement axis are perpendicular to each other.
It is characterized by further including a chuck position adjusting means for displaced the chuck portion in the axial direction perpendicular to the predetermined rotation axis and the angular displacement axis.

Further, the chuck portion of the present invention is
A plurality of pairs of chuck claws, each pair of chuck claws being arranged axisymmetrically with respect to the predetermined rotation axis, and in a state of being fitted into the hub hole, in a direction perpendicular to the predetermined rotation axis. In addition, a plurality of pairs of chuck claws that are provided so as to be displaceable in directions that are close to or separated from each other,
It is characterized by including an opening / closing driving means for displacement-driving each of the plurality of pairs of chuck claws so that the chuck claws paired with each other on an axis perpendicular to the predetermined rotation axis are close to each other or separated from each other. ..

According to the present invention, since the rotation drive unit is angularly displaced in the first direction and the second direction by the tilt drive unit, the tire is mounted with the chuck portion to which the rotation drive unit is connected arranged in the rollover position. The operator can fit the chuck portion into the hub hole of the wheel at a low position to grip the wheel or the wheel without the tire attached to the chuck portion.

The wheel gripped by the chuck portion is moved from the roll position to the upright position by the tilt drive portion causing the rotation drive portion to be angularly displaced around the horizontal angular displacement axis in the second direction, and the tire is removed from the wheel. Or, tires are mounted on the wheels. The wheel from which the tire has been removed in the upright position, or the wheel on which the tire is mounted, moves to the rollover position by the tilt drive unit angularly displaces the rotation drive unit in the first direction while being gripped by the chuck portion. Will be done. When the operator releases the gripping state of the wheel by the chuck portion, the wheel is released from the chuck portion and the wheel can be carried out.

By fitting the chuck portion into the hub hole at the rollover position in this way, the wheel can be moved from the rollover position to the upright position, or from the upright position to the rollover position, so that the operator's manpower It is possible to reduce the labor of raising and lowering the tires and wheels, and improve the efficiency of the tire changing work by the tire changing device.

Further, according to the present invention, since the tire gripping device is configured to further include a chuck position adjusting means, the chuck is placed on a vertical plane including a predetermined rotation axis in a state where the chuck portion is arranged in the lateral roll position. The portion can be displaced in the axial direction perpendicular to the predetermined rotation axis and angular displacement axis. As a result, the chuck portion is displaced so that the position of the chuck portion is substantially equal to the height position of the hub hole of the wheel according to the height position of the hub hole of the wheel of different sizes, and the tire is attached to the wheel or the wheel. The tire wheel on which is mounted can be mounted on the chuck portion. Therefore, it is not necessary for the operator to lift the wheel or the tire wheel on which the wheel is attached to the chuck portion and attach it, or manually lower the wheel or the tire wheel to which the wheel is attached from the chuck portion, which reduces the labor of the operator and improves the efficiency of the tire replacement work. Can be improved.

Further, according to the present invention, the chuck portion includes a plurality of chuck claws and an opening / closing driving means for displacement-driving each chuck claw in a direction in which the chuck claws are close to each other or in a direction away from each other, so that the inner diameter of the hub hole is large. Wheels of different wide sizes can be reliably gripped, and a versatile tire gripping device can be provided.

It is a side view which shows the tire changing apparatus 2 which includes the tire gripping apparatus 1 of one Embodiment of this invention. It is a side view of the tire changing device 2 seen from the left side of FIG. It is sectional drawing which shows the chuck part 3 in the state which the chuck claw 7 is open. It is sectional drawing which shows the chuck part 3 in the state which the chuck claw 7 is closed. FIG. 5 is a cross-sectional view showing a state in which the chuck portion 3 grips the wheel W in a frontless manner. FIG. 5 is a cross-sectional view showing a state in which the chuck portion 3 grips the wheel W in a punched-out manner. It is a side view of the tire gripping device 1 in which the chuck portion 3 is arranged in an upright position. FIG. 5 is a side view of the tire gripping device 1 in which the chuck portion 3 is arranged at the rollover position. It is sectional drawing which shows the tire gripping apparatus 1a of another embodiment of this invention. 9 is a cross-sectional view of the tire gripping device 1a as seen from the cutting surface line XX of FIG. It is a side view which shows the tire gripping device 1a in which the chuck part 3 is arranged in an upright position. It is a side view which shows the tire gripping device 1a which the chuck part 3 is arranged in the rollover position.

FIG. 1 is a side view showing a tire changing device 2 including the tire gripping device 1 according to the embodiment of the present invention, and FIG. 2 is a side view of the tire changing device 2 as viewed from the left side of FIG. The tire in the present embodiment includes a tire without a wheel, that is, a tire alone, and a tire with a wheel. The tire gripping device 1 of the present embodiment is mounted on the tire changing device 2 for removing the tire T from the wheel W or attaching the tire T to the wheel W. The tire changing device 2 basically includes a tire gripping device 1, a bead guide device A, a bead press device B, and a mount press device C.

The wheel W includes a rim portion WR on which the bead portion TB of the tire T is seated, and a disc portion WD having a hub portion WH in which the hub hole 4 is formed. Such a wheel W may be realized, for example, by press molding or spinning molding an aluminum alloy. In the present embodiment, in the tire changing device 2, the rotation speed of the chuck portion 3 is 6.5 rpm / 11 rpm, the bead pressing pressure is 17160 N to 9800 N (1750 kgf to 1000 kgf), and the rim diameter of the wheel W is 14 inches to 19.5 inches. The inner diameter of the hub hole 4 that can be gripped by the chuck portion 3 is 110 mm to 235 mm, the maximum tire diameter is 875 mm, the maximum tire width is 230 mm, and the target vehicle is a light truck.

The tire gripping device 1 is connected to a chuck portion 3 that fits into the hub hole 4 of the wheel W and grips the wheel W detachably, and the chuck portion 3 rotates around a predetermined rotation axis L1. The rotation drive unit 5 to be moved, the first direction D1 from the roll position where the rotation drive unit 5 is set to be horizontal to the upright position where the rotation axis L1 is set to be vertical, and the position from the upright position to the roll position. The second direction D2 toward which the head is directed includes a tilting drive unit 6 that is angularly displaced around the horizontal angular displacement axis L2. The tilting drive unit 6 has a pair of tilting cylinders CY7. The pair of tilting cylinders CY7 is realized by, for example, a double acting pneumatic cylinder.

The chuck portion 3 is arranged symmetrically with respect to the predetermined rotation axis L1 and can be displaced in a direction perpendicular to the predetermined rotation axis L1 and in a direction close to or away from each other in a state of being fitted in the hub hole 4. It includes a plurality of chuck claws 7 provided, and an opening / closing driving means 8 for displacement-driving each chuck claw 7 in a direction perpendicular to or away from each other in a direction perpendicular to a predetermined rotation axis L1.

The tire changing device 2 further includes a roughly plate-shaped base 10 laid on the floor 9 of an automobile repair shop, a gas station, or the like, and a support column 11 erected on the base 10. The strut 11 is movably fitted into the strut body 12 made of a hollow structural steel material having an opening 12a that opens vertically to the front side, that is, the front side perpendicular to the paper surface of FIG. 2, and extends vertically, and the opening 12a of the strut body 12. It has an elevating body 13 that fits in, and a top plate 14 that is joined to the upper end surface of the support column main body 12. The elevating body 13 includes a substantially rectangular plate-shaped member vertically long in the front view as a main body portion, and is driven up and down by an elevating cylinder CY1 housed in the support column main body 12. The elevating cylinder CY1 may be realized by a double acting pneumatic cylinder. The plate-shaped member of the elevating body 13 may be realized by a structural steel plate.

The elevating body 13 is provided with a bead guide device A and a bead press device B. A mount press device C is provided on the upper part of one side surface of the support column main body 12. The support column main body 12 and the elevating body 13 are arranged along a plane including the rotation axis L1 of the chuck portion 3 arranged in the upright position. Therefore, the central axes of the support column main body 12 and the elevating body 13 coincide with the rotation axis L1 of the chuck portion 3 in the upright position in the front view.

(Bead guidance device A)
The bead guide device A has a support arm 15 whose base end is joined to the upper part of the elevating body 13 and is inclined upward toward the rotation axis L1 of the chuck portion 3 having an upright position, and a free end of the support arm 15. An elevating cylinder CY2 for moving back and forth, an elevating shaft 16, an elevating shaft holding body 17 for holding the elevating shaft 16 so as to be movable along the axis L3, and an elevating cylinder CY3 for elevating and driving the elevating shaft 16 It has a bead guide 18 provided at the lower end of the shaft 16.

The front-rear movement cylinder CY2 has a cylinder body 19 and a piston rod 20, and an elevating shaft holder 17 is tiltably connected to the tip of the piston rod 20 around a horizontal axis L4. One end of a mounting arm 21 extending substantially horizontally is fixed to the elevating shaft holder 17. A gripping member 22 extending downward is provided at the other end of the mounting arm 21. The operator grips the gripping member 22 and moves the elevating shaft 16, the elevating shaft holder 17, the elevating cylinder CY3, and the bead guide 18 in the direction D3 close to the rotation axis L1 in parallel with the axis of the piston rod 20. And move it in the direction D4 away from the rotation axis L1, move the bead guide 18 near the rim portion WR of the wheel W, and accurately insert it into the bead portion TB of the tire T and the back side of the rim flange of the rim portion WR. be able to.

When the wheel W gripped by the chuck portion 3 is rotated in one direction E with the bead guide 18 inserted between the bead portion TB and the rim flange of the rim portion WR, the rim flange of the rim portion WR The bead portion TB seated on the back side of the wheel W is guided from the back side to the front side of the rim flange by the bead guide 18, and the upper bead portion TB1 of the tire T can be separated from the upper rim portion WR1 of the wheel W.

The forward / backward movement cylinder CY2 described above may be realized by, for example, a pneumatic linear cylinder or a linear slider. The elevating cylinder CY3 may be realized by a pneumatic double acting cylinder. Since the front-rear movement cylinder CY2 is attached to the free end portion of the support arm 15 so that the axis of the piston rod 20 is horizontal, the bead guide 18 is attached to the bead portion TB and the rim portion WR as described above. Even if the chuck portion 3 and therefore the wheel W rotate while being inserted between the rim flange and the rim flange, the bead guide 18 is prevented from coming into contact with the bead seating surface of the rim portion WR and being damaged. This prevents a decrease in the adhesion between the bead portion TB and the rim portion WR.

(Bead press device B)
The bead press device B is provided with upper bead pressing provided on the piston rods of the front-rear movement cylinders CY4 and CY5 provided on the upper and lower parts of the elevating body 13 and one of the front-rear movement cylinders CY4 located on the upper part of the elevating body 13. It has a portion 23 and a lower bead pressing portion 24 provided on the piston rod of the other forward / backward moving cylinder CY5 located below the elevating body 13. The upper bead pressing portion 23 includes a bead guide 25, an upper bead roller 26, and an upper holder 27 that rotatably holds the bead guide 25 and the upper bead roller 26 around the horizontal rotation axis L5. The bead guide 25 is formed in a tapered shape and roughly in an S shape.

The upper bead roller 26 is rotatably provided around an axis L6 that is inclined downward as it separates from the rotation axis L1 on a plane including the rotation axis L1. The upper bead roller 26 pushes down the upper bead portion TB1 of the tire T in the vicinity of the upper rim portion WR1 of the wheel W gripped by the chuck portion 3 to separate the upper bead portion TB1 in close contact with the upper rim portion WR1. Used for The axis of the upper bead roller 26 and the rotation axis L1 are configured to form an angle of 30 ° or more and 60 ° or less, preferably 45 °. The upper bead roller 26 has a truncated cone-shaped pressing surface.

The lower bead pressing portion 24 has a lower bead roller 28 that is rotatable around an axis L7 that is inclined upward as it deviates from the rotation axis L1 on a plane including the rotation axis L1. The lower bead roller 28 pushes up the lower bead portion TB2 of the tire T from below in the vicinity of the lower rim portion WR2 of the wheel W gripped by the chuck portion 3, and separates the lower bead portion TB2 in close contact from the lower rim portion WR2. It is used to make it. The axis of the lower bead roller 28 and the rotation axis L1 are configured to form an angle of 30 ° or more and 60 ° or less, preferably 45 °. It has a lower bead roller 28 and a truncated cone-shaped pressing surface.

(Mount press device C)
The mount press device C includes a bracket 30 provided on the upper part of one side surface of the support column body 12, a first horizontal arm 31 having one end rotatably connected to the bracket 30 around the axis L7, and an end of the first horizontal arm 31. A second horizontal arm 32 whose one end is rotatably connected around the axis L8 of the portion, and an axis L9 provided at the end of the second horizontal arm 32 and parallel to the rotation axis L1 of the chuck portion 3 in the upright position. It has a pressing cylinder CY6 having a pressing cylinder CY6 and a tire pressing member 33 provided at the lower end portion of the piston rod of the pressing cylinder CY6.

The tire pressing member 33 is arranged on the side opposite to the position where the upper bead roller 26 is arranged with respect to the rotation axis L1 in a plan view, and is configured to press the sidewall portion of the tire T from above. With the sidewall portion of the tire T pressed from above by the tire pressing member 33, the first horizontal arm 31 and the second horizontal arm 32 are angularly displaced, and the tire T is movably configured to follow the rotation of the tire T. .. The tire pressing member 33 may be made of a material having high strength, excellent impact resistance and wear resistance, and good slipperiness with respect to the tire T, for example, polycarbonate.

(Chuck part 3)
FIG. 3 is a cross-sectional view showing a chuck portion 3 in a state where the chuck claw 7 is open, FIG. 4 is a cross-sectional view showing a chuck portion 3 in a state where the chuck claw 7 is closed, and FIG. FIG. 6 is a cross-sectional view showing a state in which W is gripped in a front punched mode, and FIG. 6 is a cross-sectional view showing a state in which the chuck portion 3 grips the wheel W in a back punched mode.

The rotation of the output shaft of the hydraulic motor 40 is transmitted to the sprocket wheel 42 of the chuck portion 3 via the chain 41. The sprocket wheel 42 is coaxially connected to the spindle 43. A chuck portion 3 is provided at the tip portion of the spindle 43. The rotary drive unit 5 includes the hydraulic motor 40, the chain 41, the sprocket wheel 42, and the spindle 43.

The chuck portion 3 is a plurality of pairs of chuck claws 7, and each pair of chuck claws 7 is arranged symmetrically with respect to the rotation axis L1 and is fitted in the hub hole 4 of the hub portion WH. A plurality of pairs of chuck claws 7 provided so as to be displaceable in a direction perpendicular to the rotation axis L1 and in a direction close to or separated from each other, and a pair of chuck claws 7 on an axis perpendicular to the rotation axis L1 are close to each other or separated from each other. The opening / closing driving means 8 for displacement-driving each of the plurality of pairs of chuck claws 7 is included.

The opening / closing drive means 8 includes four pairs of connecting plates 44, roller guide plates 45, roller receiving members 46, chuck flanges 47, four link members 48, cylinder case 49, piston 50, connecting plates 51, and spindle 43. And a sprocket wheel 42 and the like.

When the piston rod of the piston 50 is extended, the chuck claws 7 can be moved in directions away from each other to grip the wheel W. Further, when the piston rod of the piston 50 is degenerated, the chuck claws 7 can be moved in directions close to each other to release the gripping state of the wheel W.

FIG. 7 is a side view of the tire gripping device 1 in which the chuck portion 3 is arranged in the upright position, and FIG. 8 is a side view of the tire gripping device 1 in which the chuck portion 3 is arranged in the rollover position. Since the rotation drive unit 5 is angularly displaced in the first direction D1 and the second direction D2 by the tilt drive unit 6, the tire T is in a state where the chuck unit 3 to which the rotation drive unit 5 is connected is arranged in the rollover position. The operator fits the chuck portion 3 into the hub hole 4 of the wheel W at a low position on the mounted wheel W or the wheel W on which the tire T is not mounted, and causes the chuck portion 3 to grip the wheel W. Can be done.

The wheel W gripped by the chuck portion 3 is moved from the roll position to the upright position by the tilt drive portion 6 angularly displaces the rotation drive portion 5 around the angular displacement axis L2 horizontal to the second direction D2. The tire T is removed from the wheel W, or the tire T is attached to the wheel W. The tilting cylinder CY7 of the tilting drive unit 6 is realized by a double-acting pneumatic cylinder in this embodiment, but may be realized by a double-acting hydraulic cylinder in another embodiment, and further, an air pressure source or a hydraulic source. When it is difficult to use pressure source equipment such as, for example, when mounting on a road service vehicle and changing tires on site, even if it is realized by electrical power equipment such as a combination of a reduction gear and an electric motor. Good.

The wheel W from which the tire T is removed in the standing position or the wheel W on which the tire T is mounted is held by the chuck portion 3, and the tilt drive portion 6 corners the rotation drive portion 5 in the first direction D1. It is moved to the rollover position by being displaced. When the operator releases the gripping state of the wheel W by the chuck portion 3, the wheel W is released from the chuck portion 3 and the wheel W can be carried out.

By fitting the chuck portion 3 into the hub hole 4 at the rollover position in this way, the wheel W can be moved from the rollover position to the upright position, or from the upright position to the rollover position. It is possible to reduce the labor of raising and lowering the tire T and the wheel W by the human power of the operator, and improve the efficiency of the tire changing work by the tire changing device 2.

FIG. 9 is a cross-sectional view showing the tire gripping device 1a of another embodiment of the present invention, and FIG. 10 is a cross-sectional view of the tire gripping device 1a seen from the cutting surface line XX of FIG. FIG. 11 is a side view showing the tire gripping device 1a in which the chuck portion 3 is arranged in the upright position, and FIG. 12 is a side view showing the tire gripping device 1a in which the chuck portion 3 is arranged in the rollover position. The same reference numerals are given to the parts corresponding to the above-described embodiments, and duplicate description will be omitted.

Similar to the tire gripping device 1 of the above-described embodiment, the tire gripping device 1a of the present embodiment has a rim portion on which the bead portion of the tire is seated and a disc portion having a hub portion WH in which the hub hole 4 is formed. The provided wheel W is provided in a tire changing device for removing the tire T from the wheel W or attaching the tire T to the wheel W.

The tire gripping device 1a is connected to a chuck portion 3 that fits into the hub hole 4 of the wheel W and grips the wheel W detachably, and the chuck portion 3 is connected to the chuck portion 3 to rotate the chuck portion 3 around a predetermined rotation axis L1. The rotation drive unit 5 and the rotation drive unit 5 are moved from the rolling position where the predetermined rotation axis L1 is horizontal to the standing position where the predetermined rotation axis L1 is vertical, and the first direction D1 from the standing position to the rolling position. In the second direction D2 toward D2, the tilting drive unit 6 for angular displacement around the horizontal angular displacement axis L2, the predetermined rotation axis L1 and the angular displacement axis L2 are perpendicular to each other, and the predetermined axis L1 and the angular displacement axis L2. Includes a chuck position adjusting means 70 that displaces the chuck portion 3 in the axial direction perpendicular to L2.

The chuck position adjusting means 70 includes a chuck position adjusting cylinder CY8, a bracket 71 arranged on one side of the rotational drive unit 5 in the angular displacement axis L2 direction, and a bracket 71 protruding outward from one side wall, and the rotational drive unit 5. It has a pair of bearing members 52, 53 fixed to the other side wall arranged on the other side in the angular displacement axis L2 direction, and a guide shaft 54 movably inserted into each of the bearing members 52, 53. Each bearing member 52, 53 has both ends in the axial direction of each bearing member 52, 53 parallel to the axis perpendicular to the predetermined rotation axis L1 and angular displacement axis L2 (in the left-right direction in FIG. 9) by the bracket 55. It is arranged so as to have an axis. Each axis of these guide shafts 54 is also parallel to the axis of each piston rod of each chuck position adjusting cylinder CY8. Each chuck position adjusting cylinder CY8 is realized by, for example, a double-acting hydraulic cylinder.

The turntable 8 has a hollow rectangular parallelepiped metal housing 56. The housing 56 has a box-shaped lower housing 56a and an upper housing 56b that is mounted so as to cover the lower housing 56a. The lower housing 56a has a bottom portion 57 having a rectangular shape in a plan view, and four side wall portions 58 extending vertically from the four side edges of the bottom portion 57 to the bottom portion 57 to form a square cylinder. The upper housing 56b has a top plate 59 having a rectangular shape in a plan view, and four side wall portions 60 extending vertically from the four side edges of the top plate 59 and continuing in the circumferential direction.

Such an upper housing 56b has a front side housing portion 56b1 arranged on the front side and a back side housing portion arranged on the support column main body 12 side when viewed from the left side of FIG. It is composed of 56b2. By forming the upper housing 56b in this way, only the housing portion 56b1 or the housing portion 56b2 on one side can be removed from the lower housing 56a without removing the chuck portion 3 and the rotation drive portion 5. The inside of the housing 56 can be opened to perform operations such as internal cleaning and parts replacement.

Each pair of brackets 55 is made of, for example, steel and is welded and joined to the bottom 57 of the lower housing 56a. Both ends of each guide shaft 54 in the axial direction are detachably joined to such a bracket 55 by a screw member such as a bolt.

The housing 61 is made of, for example, a steel plate, and can be easily bent even if a tire wheel having a large wheel diameter of 19.5 inches and a heavy wheel W mounted on it is accidentally dropped and a large impact force is applied. Has high bending rigidity that does not deform.

The upper housing 56b is attached to the lower housing 56a so that the opening peripheral edge of each side wall 58 of the lower housing 56a is surrounded by the opening peripheral edge of each side wall 60 of the upper housing 56b. The opening peripheral edge of each side wall 59 of the housing 56a and the opening peripheral edge of each side wall 60 of the upper housing 56b are detachably joined by a plurality of bolts. By detachably joining the lower housing 56a and the upper housing 56b with a plurality of bolts, screwing is performed when performing maintenance management work such as adjustment, replacement, and internal cleaning of parts housed in the housing 56. By pulling out the plurality of bolts, the joint state between the upper housing 56b and the lower housing 56a is released, the upper housing 56b is removed from the lower housing 56a, and the inside of the housing 56 is easily opened to open the parts. You can adjust, replace, and clean the inside.

An elongated hole 61 through which the cylinder case 49 of the chuck portion 3 is inserted is formed in the top plate 59 of the upper housing 56b. The elongated hole 61 extends in the horizontal direction (horizontal direction in FIG. 9) along a third axis perpendicular to the predetermined rotation axis L1 and angular displacement axis L2, and the rotation drive unit 5 by each chuck position adjusting cylinder CY8. The displacement of the cylinder case 49 can be tolerated.

Since the tire gripping device 1a is configured to further include the chuck position adjusting means 70, the chuck portion 3 is arranged at the rollover position shown in FIG. 12 on a vertical plane including a predetermined rotation axis L1. The height of the upper edge of the hub hole 4 of the wheel W from the floor surface of the chuck portion 3 can be moved within a range of distances L10 to L11. In the present embodiment, the distance L10 is, for example, 318 mm, and the distance L11 is 398 mm. As a result, the chuck portion 3 is displaced so that the position of the chuck portion 3 is substantially equal to the height position of the hub hole 4 of the wheel W according to the height position of the hub hole 4 of the wheels W having different sizes. The upper end of the chuck claw 7 can be positioned so as to pass under the upper edge of the wheel W hub hole 4. Therefore, the worker does not need to lift and mount the wheel W or the tire wheel on which the tire T is mounted to the chuck portion 3 up to the chuck portion 3 or manually lower the tire wheel from the chuck portion 3, and the worker does not need to manually lower the wheel W or the tire wheel. It is possible to reduce the labor of the tire and improve the efficiency of the tire replacement work.

Further, as shown in FIG. 11, when the chuck portion 3 is arranged in the upright position, the chuck portion 3 is moved back and forth within a distance ST in the axial direction perpendicular to the predetermined rotation axis L1 and angular displacement axis L2. Can be made to. This distance ST is, for example, 80 mm. With such a configuration, the wheel W, the tire T, or the tire wheel can be easily moved and positioned at an appropriate position as close as possible to the bead guides 18, 25, the upper bead roller 26, the lower bead roller 28, and the like. As a result, the moving distance of members such as the bead guides 18 and 25, the upper bead roller 26 and the lower bead roller 28 is shortened to reduce unnecessary movement, improve the workability of tire replacement work, and achieve high work efficiency. can do.

Further, according to the present embodiment, the chuck portion 3 includes a plurality of chuck claws 7 and an opening / closing driving means 8 for displacement-driving each chuck claw 7 in a direction in which the chuck claws 7 are close to each other or in a direction away from each other. Wheels W having a wide range of sizes with different inner diameters of the hub holes 4 can be reliably gripped, and a highly versatile tire gripping device can be provided.

The present invention is capable of the following other embodiments (1) and (2).
(1) A chuck portion 3 that holds the lower rim portion of the wheel W detachably and drives the wheel W to rotate around a vertical rotation axis.
The upper bead portion was guided so that the upper bead portion of the tire T was fitted to the upper rim portion of the wheel W held by the chuck portion 3, and was fitted to the upper rim portion of the wheel W. A bead guide member that guides the upper bead portion of the tire T so as to separate from the upper rim portion, is parallel to the virtual horizontal plane perpendicular to the rotation axis, and supports the lower bead portion of the tire T from below. A bead guide member having a bead support portion, a bead guide member which is tapered toward the downstream side in the rotation direction of the rotary table and has an insertion portion inserted between the upper bead portion and the upper rim portion.
The lower bead portion of the tire T with the upper bead portion removed from the upper rim portion of the wheel W is pressed from the lower side to the upper side at a position close to the downstream side in the rotational direction of the bead guide member. A tire changing device including a lower bead roller that separates the lower bead portion of the tire T from the upper rim portion of the wheel W.

According to the present embodiment, the lower bead is supported from below by the bead support portion of the bead guide member, and the lower bead portion of the tire T fitted to the wheel W is pressed from the lower side to the upper side by the lower bead roller. Since the upper bead portion can be detached from the upper rim portion of the wheel W, the highly rigid tire T can be detached from the wheel W without causing the tire T to generate a large tension, thereby damaging the tire T. The tire T can be easily removed from the wheel W. Further, since the bead guide member has an insertion portion, it is possible to insert the insertion portion so as to cut in between the upper rim portion and the upper bead portion to separate the upper bead portion from the upper rim portion without damaging it. it can.

(2) It has a truncated cone-shaped pressing surface that becomes smaller in diameter as it deviates from the rotation axis, and is dropped from the portion where the bead guide member is arranged at a position close to the bead guide member. Includes a bead roller that pushes to the part
The lower bead roller includes a first virtual one plane including the rotation axis and a position where the bead guide member is arranged, and a second virtual plane including the rotation axis and a pressing position by the bead roller in a plan view. It is characterized in that the angle formed by the two is provided in a range of 30 ° or more and less than 90 °.

1 Tire gripping device 2 Tire changing device 3 Chuck part 4 Hub hole 5 Rotation drive part 6 Tilt drive part 7 Chuck claw 8 Opening and closing drive means 10 Base 11 Strut 12 Strut body 13 Elevating body 14 Top plate 15 Support arm 16 Elevating shaft 17 Elevating shaft holder 18,25 Bead guide 19 Cylinder body 20 Piston rod 21 Mounting arm 23 Gripping member 70 Chuck position adjusting means CY1 Elevating cylinder CY2 Elevating cylinder CY3 Elevating cylinder CY4, CY5 Elevating cylinder CY6 Pressing Cylinder for tilting CY7 Cylinder for tilting CY8 Cylinder for adjusting chuck position D1 1st direction D2 2nd direction D3 Proximity direction D4 Separation direction T Tire TB Bead part TB1 Upper bead part TB2 Lower bead part W Wheel WD Disc part WH Hub part WR Rim part

Claims (3)

A wheel having a rim portion on which a bead portion of a tire is seated and a disc portion having a hub portion formed with a hub hole, which is used as a tire changing device for removing a tire from the wheel or attaching a tire to the wheel. In the provided tire gripping device
A chuck portion that fits into the hub hole of the wheel and grips the wheel detachably.
A rotation drive unit that is connected to the chuck unit and rotates the chuck unit around a predetermined rotation axis.
At the height position of the hub hole of the wheel arranged in an upright position on the floor surface, the rotation drive unit is moved from an overturning position where the predetermined rotation axis is horizontal to an upright position where the predetermined rotation axis is vertical. A tire gripping device comprising: a tilting drive unit for angular displacement around a horizontal angular displacement axis in a first direction toward the head and a second direction from the upright position to the rollover position. The predetermined rotation axis and the angular displacement axis are perpendicular to each other.
The tire gripping device according to claim 1, further comprising a chuck position adjusting means for displaced the chuck portion in an axial direction perpendicular to the predetermined rotation axis and the angular displacement axis. The chuck portion is
A plurality of pairs of chuck claws, each pair of chuck claws being arranged axisymmetrically with respect to the predetermined rotation axis, and in a state of being fitted into the hub hole, in a direction perpendicular to the predetermined rotation axis. In addition, a plurality of pairs of chuck claws that are provided so as to be displaceable in directions that are close to or separated from each other,
It is characterized by including an opening / closing driving means for displacement-driving each of the plurality of pairs of chuck claws so that the chuck claws paired with each other on an axis perpendicular to the predetermined rotation axis are close to each other or separated from each other. The tire gripping device according to claim 1 or 2.