JPH0635683Y2 - Tire attaching / detaching device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a tire attaching / detaching device, and more particularly to a tire attaching / detaching device characterized by a tool base / arm interlocking device.

(Prior Art) There are various types of tire attaching / detaching devices, but the device to which the present invention is applied can perform the attaching / detaching work of the tire with the tire (a) standing vertically as shown in FIG. Is. Therefore, the device has an arm (c) for supporting the wheel (b), and a claw (d) for gripping the wheel (b) is provided at the end of the arm (c) so that the device can be rolled to a predetermined position. The wheel (b) of the tire (a) is chucked by the claw (d) and is lifted in that state. The tire (a) is lifted by swinging the arm (c), the tire (a) is rotated in the lifted state, and the bead roller (e) is pressed from the side surface.

By the way, FIG. 7a shows the order in which the tire (a) attached to the wheel (b) is released.
As shown in the figure, the wheel (b) has a side ring (f). First, as shown in b, in order to remove the side ring (f), the tire (a) is pressed from the side ring side by the bead roller (e) to remove the bead portion of the tire (a) that is in close contact with the side ring (f). To release. With the side ring (f) removed, the bead roller (e) is moved to the opposite side of the tire (a), the side surface is pressed, and the tire (a) is removed from the wheel (b). In the case of a wheel having a side ring as described above, of course, even if the wheel does not have the side ring, it is necessary to release the adhesion of the tire before releasing the tire. The bead roller is formed by sequentially pressing the left and right side surfaces of the tire.

By the way, the arm of the bead roller expands and contracts according to the diameter of the tire to be attached and detached and is set at a predetermined position, and the arm is oriented toward the center axis of the tire. When the bead roller set in this way is moved to the opposite side of the tire, the arm must be contracted and the arm must be erected.
Since the extension and contraction and standing of the arm are actuated by the hydraulic cylinder, the movement is slow, and therefore the work efficiency is reduced, and once the arm is contracted, the arm is moved to the opposite side, and then the arm is extended again to extend the bead roller. Must be set again at a predetermined position and locked, which further promotes the reduction of the work efficiency.

Further, not only the expansion and contraction of the arm to which the bead roller is attached and the standing up, but also the time required for moving the bead roller to the opposite side of the tire takes a long time, which causes a problem in the workability.

(Object of the present invention) As described above, with respect to the movement of the tool base on which the bead roller is mounted and the positioning setting of the bead roller in the tire attachment / detachment device, the above-mentioned problems exist and workability is deteriorated. The present invention is a technique developed for the purpose of solving these problems. One is that the tool base can be quickly moved to the opposite side of the tire, and the other is that the tool base can be moved. (EN) A tire attaching / detaching device capable of easily raising a bead roller attaching arm mounted on a base and setting the bead roller.

(Structure of the present invention) The basic form of the tire attaching / detaching device which is the subject of the present invention is as shown in FIG. 6, and a claw for chucking a wheel is attached to an arm end extending from the main body, and the claw is a motor. It is driven to rotate by. The arm is attached so as to be horizontally movable along the main body, and the arm swings when the main body rotates, and the tire clamped by the claw is lifted from the base. A tool base for mounting a bead roller is also attached to the main body so as to be movable in the horizontal direction, and the arm and the tool base are interlocked with each other. In other words, moving the bead roller to move it to the opposite side of the tire is the same even if the tire is moved in reverse. Therefore, by interlocking the two, the respective moving directions are reversed. In the present invention, as the interlocking mechanism, a sprocket or pulley is pivotally supported at both ends of the main body, a chain or a belt is wound around the sprocket, and the upper span and the lower span are fixed to the tool base and the arm, respectively. A hydraulic cylinder is fixed to one end of the main body, and a piston rod of the hydraulic cylinder is fixed to the arm or the tool base. When the piston rod expands or contracts, the arm and the tool base are in the opposite directions by the same distance. Moving. Therefore, the movement of the bead roller is completed in at least half the time compared to the case where only one is moved. On the other hand, since the tire attaching / detaching device of the present invention cannot move while the bead roller is tilted, it is equipped with an erecting device for erecting the holder to which the bead roller is attached on the tool base. Here, the standing device is characterized by the following mechanism. The bead roller is a tool used for directly attaching and detaching the tire by being pressed against the side surface of the tire, regardless of its specific shape, as long as it is suitable for attaching and detaching the tire, the bead roller is provided with a long arm. And is attached to the holder via the arm.
The holder is attached to the standing body and is slidable in the longitudinal direction, the root of the hydraulic cylinder is fixed to the standing body, and the tip of the piston rod of the hydraulic cylinder is connected to the holder. ing. Therefore, when the piston rod expands and contracts, the holder is guided by the upright body to slide, and the bead roller moves in the longitudinal direction (arm direction). Further, the standing body is in a state of being supported by legs for standing upright, and is supported on the basis of the fastening shaft of the hydraulic cylinder. Further, an upright cylinder for erecting the upright body is fixed to the leg, and the piston rod of the cylinder is connected to the upright body, but the shaft is rotatably attached to the upright body without being directly connected. It is connected to the supported locking piece. Here, the standing cylinder is arranged with a certain distance from the fastening axis of the standing body at the center of the standing cylinder, and a moment is generated around the fastening axis of the standing body due to the expansion and contraction of the standing cylinder. Stand up or vice versa. The locking piece is capable of rotating within a certain range of angles about a rotation shaft pivotally supported by the upright body, and in order to regulate the rotation angle, a stopper is provided on one side and a claw is provided on the other side. Is provided. The stopper is formed on the standing body, and the claw is formed on the tool base side on which the standing body is mounted.If the standing cylinder is extended and the standing body is tilted, the locking piece naturally engages the claw, The standing body is in a locked state. On the contrary, when the piston rod of the standing cylinder is contracted to raise the standing body, the lock is released and the locking piece abuts the stopper to raise the standing body.

Hereinafter, an embodiment of a tire attaching / detaching device according to the present invention will be described in detail with reference to the drawings.

(Embodiment) FIG. 1 is a specific example of a standing device for attaching a root portion of an arm 2 mounted on a main body 1 of a tire attaching / detaching device, a tool base 3, and a bead roller provided on the tool base. Is. As is clear from the figure, rails 4 and 5 are formed on the main body 1 in the longitudinal direction.
The arm 2 and the tool base 3 are slidably guided by the rails 5, respectively, and the sliding is performed by a hydraulic cylinder 6. That is, the hydraulic cylinder 6 is fixed to the end of the main body 1, and the piston rod 7
The end is connected to the root of the arm 2. Therefore, when the piston rod 7 expands and contracts, the arm 2 slides along the rail 4 of the main body 1, and the tool base 3 connected to the arm 2 via the chain 8 also moves in the opposite direction.

2 and 3 show an embodiment in which an interlocking mechanism of the arm 2 and the tool base 3 is displayed. The arm 2 and the tool base 3 are wound around sprockets 9a, 9b pivotally supported by the main body 1. Is connected to the chain 8. That is, the sprockets 9a and 9b are rotatably supported at both ends of the main body 1, and the chain 8 is attached to the sprockets 9a and 9b.
, The tool base 3 is fastened to the upper span 10 of the chain 8 and the arm 2 is fastened to the lower span 11, respectively.
A tension bolt 12 is attached to the tool base 3 to prevent the chain 8 from loosening. Therefore, if the piston rod 7 of the hydraulic cylinder 6 is contracted in order to move the arm 2 to the left (the direction of the arrow), the sprocket
9a and 9b are pulled by the chain 8 and rotate clockwise (to the right) to move the tool base 3 to the right (to the arrow). Of course, the movement distance is the same. By the way, as shown in FIGS. 1 and 4, the erection device for the bead roller mounted on the tool base 3 has legs 13 formed vertically on the tool base 3 and provided at one position of the legs 13. Axis 14
A standing main body 15 is rotatably supported by the holder 16, a holder 16 is slidably attached to the standing pocket 15 in the longitudinal direction of the arm 2, and a bead roller 17 is attached to the tip of the holder 16. . Since the holder 16 is slid by the cylinder 18, the end of the cylinder 18 is fixed to the shaft 14, and the tip 19 of the piston rod projects from the holder 20.
Connected to. Therefore, if the piston rod projects, the holder 16 and the bead roller 17 also project to match the diameter of the tire mounted on the end of the arm 2. Further, a holder 16 and a bead roller 17 are attached to the leg 13, and a standing cylinder for standing up a standing body 15.
21 is attached and the end of the standing cylinder 21 is
It is attached to a shaft 22 which is spaced a certain distance from 14, and the tip of a piston rod 23 is connected to a locking piece 24. The locking piece 24 is rotatably supported about a shaft 25 provided in the upright body 15, and is located near a position where the tip of the piston rod 23 of the locking piece 24 is connected. Concave groove 26
Are formed. Therefore, when the piston rod 23 contracts, the locking piece 24 rotates clockwise, and when it extends, the locking piece 24 rotates counterclockwise. Here, the stopper 27 for preventing the locking piece 24 from rotating in the clockwise direction is provided with the standing body 15.
If the piston rod 23 is further contracted with the locking piece 24 in contact with the stopper 27, a counterclockwise moment is generated about the shaft 14 that supports the standing body 15. Then, the standing body 15 stands up.

FIG. 5 shows a state in which the upright body 15 is upright. The standing body
15 is erected by rotating around the shaft 14, and as shown in FIG. 4, the erection cylinder 21 is erected so that the center axis of the erection cylinder 21 is located above the shaft 14 when the erection body 15 is tilted. The cylinder 21 needs to be arranged.
On the contrary, when the standing body 15 is tilted from the state shown in FIG. 5, by extending the piston rod 23 of the standing cylinder 21, the shaft 14
Rotate clockwise around and fall down. At the same time it falls
The locking groove 26 formed in the locking piece 24 engages with the claw 28 provided on the tool base 3, and the standing body 15 is locked.

On the other hand, as shown in FIG. 4, the main body 1 is formed with a rail 4 on which the arm 2 is slidably attached, on its side surface, and is rotated around a shaft 31 at the upper ends of the legs 30, 30 provided on a base 29. The main body 1 is movably supported by a shaft and is rotated by a hydraulic cylinder 32. That is, when the piston rod of the hydraulic cylinder 32 expands and contracts, the main body 1 rotates about the shaft 31, and the arm 2 and the tool base 3 attached to the main body 1 also swing. A claw for fixing a wheel is attached to the tip of the arm 2, and a motor 33 for rotating and driving the claw is arranged. Power from the motor 33 is transmitted to the claw via a chain 34. Transmitted.

The operation sequence of the above-mentioned mounting will be described below based on the tire removing work. First, the bead roller 17 is set at an appropriate position according to the diameter of the tire mounted on the tip of the arm 2. The position of the bead roller 17 is carried out by operating the cylinder 18, and the holder 16 is moved by extending the piston rod of the cylinder 18, so that the bead roller 17 moves along the longitudinal direction of the arm 2. When the bead roller 17 is set at a predetermined position, the motor 33 is driven to rotate the tire and press the bead roller 17 against the side surface of the tire. When the tire bead is released from the side ring (f) in the state of FIG. 7b, the side ring (f) is removed and the bead roller 17 is moved to the opposite side of the tire. In this case, without moving the bead roller 17, the standing cylinder 21 is operated to stand the standing body 15 and move the tool base 3. Of course, in this case, if the tool base 3 moves, the arm 2 moves in the opposite direction by the same distance, so that the bead roller 17 can be immediately moved to the opposite side of the tire. Bead roller moved to the other side
By extending the piston rod 23 of the erecting cylinder 21, the erecting main body 15 is collapsed to be arranged at a predetermined position on the side surface of the tire, and the bead roller 17 is pressed against the tire while rotating the tire again. Therefore, the tire (a) easily separates from the wheel (b) from which the side ring (f) has been removed.

Although the embodiment described above is merely an example of the present invention and the present invention is not limited to the embodiment, the following effects can be obtained.

(Effect) (1) In the tire attaching / detaching device of the present invention, the arm and the tool base on which the main body is slidably mounted in the longitudinal direction are connected to each other in an interlocking state, and when the bead roller is moved to the opposite side of the tire. Since the arm moves in the opposite direction at the same time when the tool base is moved, the moving work can be completed in a very short time and the actual work can be started. That is, workability can be significantly improved. Further, since a chain wound around a sprocket is used as the connecting device and a tensioner bolt is attached to prevent the chain from loosening, there is no rattling in the movement of both and a smooth sliding is exhibited.

(2) Further, in the present invention, since the bead roller can be erected by the erection cylinder, the bead roller can be moved to the opposite side of the tire without changing the position (projection length), and the tire can be efficiently attached and detached. . That is,
Time to make the bead roller protrude or retract,
In addition, the work of aligning the bead roller with the side surface of the tire is unnecessary.

(3) Further erecting and tilting the bead roller Since the erecting cylinder is connected to the erecting main body through the locking piece, the expansion and contraction of the piston rod of the erecting cylinder simply causes the erecting main body to erect or fall. Not only
Simultaneously with the fall, the locking piece is engaged with the claw, and the bead roller is immediately locked.

That is, since another operation for locking is not required, workability can be further improved, and the work itself is safe because it is automatically locked. On the contrary, when the bead roller is raised, the lock is released only by operating the raising cylinder without performing another operation for releasing the lock, and the bead roller is raised.

[Brief description of drawings]

FIG. 1 is a three-dimensional view showing a connected state of an arm and a tool base in a tire attaching / detaching device according to the present invention and a standing device for a bead roller provided on the tool base.
2 and 3 are a plan view, FIG. 3 is a front view, and FIG. 4 is a sectional view of the apparatus showing a state in which a bead roller is tilted. The figure shows a state in which the bead roller is erected, FIG. 6 shows an external view of a general tire attaching / detaching device, and FIGS. 7 (a) to 7 (c) show a procedure for separating the tire from the wheel. 1 ... Main body, 2 ... Arm, 3 ... Tool base, 4, 5 ... Rail, 6, 32 ... Hydraulic cylinder, 7, 23 ... Piston rod, 8, 34 ... Chain, 9 ... Sprocket, 10 ... Upper span, 11 ... Lower span, 12 ... Tension bolt, 13, 30 ... Leg, 14, 22, 25, 31 ... Shaft, 15 ... Standing body, 16 ... Holder, 17 ... Bead roller, 18 ... Cylinder, 19 ... Piston rod tip 20 ... Projection piece , 21 ... Standing cylinder, 24 ... Locking piece, 26 ... Locking groove, 27 ... Stopper, 28 ... Claw, 29 ... Base, 33 ... Motor.

Claims (3)

[Scope of utility model registration request] 1. An arm and a tool base are slidably attached along a rail of a main body swingably supported on a base,
Attach a claw for fixing the wheel to the arm end,
In a tire attaching / detaching device in which a bead roller is attached to a tool base, a hydraulic cylinder is attached to one end side of a rail provided on the main body, a tip of a piston rod of the hydraulic cylinder is connected to an arm, and both end portions of the main body are attached. Rotatably supports a sprocket or pulley, winds a chain or belt around the sprocket or pulley, and fastens the upper span and lower span tips of the chain, etc. to the tool base and arm, respectively. A tire attaching / detaching device characterized in that a tension bolt is interposed to prevent slack due to stretching. 2. The tire attaching / detaching device according to claim 1, wherein the piston rod of the hydraulic cylinder is connected to a tool base. 3. An arm and a tool base are slidably attached along a rail of a main body swingably supported on a base, and a claw for fixing a wheel is attached to an end of the arm. In a tire attaching / detaching device in which a bead roller is attached to a tool base, a standing body is pivotally supported by the legs provided on the tool base, and a holder having a bead roller is slidable on the standing body. , And one end of the standing cylinder is fixed at a certain distance upward from the shaft supporting the standing body, and the tip of the piston rod protruding from the standing cylinder is rotatably supported by the standing body. And a stopper for restricting the rotation of the locking piece, the locking groove is formed in the locking piece, and the claw to be engaged with the locking groove is used as a tool. Formed on the base side and stand up above A central axis of the hydraulic cylinder is separated from the fastening axis of the standing body by a fixed distance, and a hydraulic cylinder is attached to one end of a rail provided on the main body, and a tip of a piston rod of the hydraulic cylinder is connected to an arm. A sprocket or pulley is rotatably supported at both ends of the main body, a chain or belt is wound around the sprocket or pulley, and the tips of the upper span and the lower span of the chain are fixed to the tool base and the arm, respectively. A tire attaching / detaching device characterized in that a tension bolt for preventing slack due to chain extension is interposed.