JP6317013B1 - Tire attachment / detachment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tire attaching / detaching device capable of reducing the time required for removing a tire from a wheel by reducing labor of an operator. A control device is configured to detect a pressure when a predetermined time has elapsed from a time when supply of hydraulic oil for moving a chuck claw 305 radially outward to a hydraulic cylinder C1 is started. When the pressure of the hydraulic fluid detected by the engine is equal to or higher than the predetermined first pressure P1 and lower than the predetermined second pressure P2 higher than the first pressure P1, the movement of the pressing body is started and predetermined. When the time has elapsed, if the pressure of the hydraulic oil detected by the pressure detection unit 310 is lower than the predetermined first pressure P1 or higher than the predetermined second pressure P2, the check valve V11 And the hydraulic cylinder C1 is moved to the origin. [Selection] Figure 1

Description

  The present invention relates to a tire attachment / detachment device that is mounted on a wheel in a state where an automobile tire is erected, and that removes the tire mounted on the wheel from the wheel.

  When the vehicle is a large vehicle such as a bus, a truck, or a large special vehicle, the outer diameter of the wheel is as large as 17.5 inches to 22.5 inches. Therefore, a tire attaching / detaching device called a tire changer that attaches a car tire to a wheel and removes the tire attached to the wheel from the wheel has been conventionally used. It is used.

  In such a tire attaching / detaching device, a guide press device is erected on one side of a base having a substantially rectangular shape when viewed from the floor, and a chuck device is provided on the other side of the base. It is done. At the upper end of the stud, there is a tire pushing device that pushes and pushes a tire that has not been fitted with a wheel against the wheel, and a tire bead portion of the tire that is once fitted to the wheel. A tire rotation auxiliary device that rotates together with the tire while pressing the side portion of the tire is provided so as not to be separated from the wheel by force. A main shaft that is rotationally driven around a horizontal rotation axis is projected from the upper portion of the support, and a grip portion called a chuck that holds a wheel is provided at the tip of the main shaft.

  The base is also provided with a pair of guide shafts extending between both side portions of the base, and each guide shaft is provided with a moving base that moves while being guided by each guide shaft. The movable table is provided with a pair of bead rollers spaced apart from each other so that the tire can be fitted therein, and a cradle that supports the tire or the wheel on which the tire is mounted, and a pedestal for driving the cradle up and down. And a lifting device.

  When the wheel is placed on the cradle by human power in a state where the cradle is disposed at the lower limit position, the cradle on which the wheel is placed is lifted by the lifting device, and is on the rotation axis of the main shaft and the gripper. The wheel is held on the main shaft by moving to the main body side until the tip of the gripping part is fitted to the wheel, and then moving the gripping part to the main body side until it moves to the position where the central axis of the wheel is arranged. (For example, see Patent Documents 1 to 3).

Japanese Patent Laid-Open No. 9-39527 JP 2006-335210 A JP 2012-20659 A

  In the prior art described in the above-mentioned Patent Documents 1 to 3, after the time required for the gripping part that grips the wheel to expand to the maximum from the contracted state has elapsed, the tire is removed from the wheel of the wheel-attached tire. The removal process continues. There is a risk that the process of removing the wheel tires may start in a state where the gripping part is not gripping the wheel securely, so that the operator is gripped by the gripping part in a normal state. Therefore, there is a problem that a lot of labor and time are required for the work.

  An object of the present invention is to provide a tire attaching / detaching device capable of reducing the labor required for an operator and reducing the time required for removing a tire from a wheel.

The present invention is a chuck device for gripping a wheel of a wheel-mounted tire in which a tire is mounted on a wheel,
A spindle driven to rotate around a horizontal axis of rotation;
A hydraulic cylinder provided on the main shaft;
A chuck device having a plurality of gripping portions provided at the tip of the main shaft coaxially with the main shaft, inserted into the wheel, moved radially outward, and grips the wheel;
A hydraulic oil supply source for supplying hydraulic oil to the hydraulic cylinder via a conduit;
A pressure detector that is disposed in the pipe and detects the pressure of hydraulic oil supplied to the hydraulic cylinder;
A switching valve for switching the flow path of the hydraulic oil flowing through the pipeline;
A pressing body that moves parallel to the rotational axis to press the tire of the wheel-attached tire;
A control device,
The pressure of the hydraulic oil detected by the pressure detection unit when a predetermined time has elapsed since the supply of the hydraulic oil for moving the gripping portion radially outward to the hydraulic cylinder is started. In the case where the pressure is equal to or higher than the predetermined first pressure and equal to or lower than the predetermined second pressure higher than the first pressure, the movement of the pressing body is started.
When the pressure of the hydraulic oil detected by the pressure detection unit is lower than the first predetermined pressure or higher than the second predetermined pressure when the predetermined time has elapsed, And a control device that switches the switching valve to move the hydraulic cylinder to the origin.

  Further, the present invention is characterized in that the predetermined time is a time required from when the supply of the hydraulic oil to the hydraulic cylinder is started until the gripping portion grips the wheel.

  In the invention, it is preferable that the predetermined first pressure is a pressure at which the grip portion can grip the wheel.

  According to the present invention, it is not necessary for the operator to visually check whether or not the gripping unit is gripping the wheel accurately, and the chucking device grips the wheel by reducing the labor of the worker. The time required can be shortened. Further, it is possible to prevent the tire from being removed from the wheel in a state where the gripping portion does not grip the wheel accurately, and damage to the tire can be prevented.

  According to the present invention, the predetermined time is a time required for the gripper to grip the wheel, and the gripper can grip the wheel when the predetermined time has elapsed. .

  According to the present invention, the predetermined first pressure is a pressure at which the grip portion can grip the wheel, and the pressure of the hydraulic oil detected by the pressure detection portion is a predetermined first pressure. If it is the above, a grasping part can grasp a wheel.

It is a front view showing a tire attaching and detaching device of one embodiment of the present invention. It is a top view of a tire attaching / detaching device. It is a side view of a tire attaching / detaching device. It is a disassembled perspective view which shows the arm part of a chuck | zipper apparatus. It is a disassembled perspective view which shows a chuck | zipper part. It is sectional drawing of a chuck | zipper part. It is the front view which looked at the chuck | zipper part from the left side of FIG. It is the expanded sectional view seen from the cut surface line CC of FIG. It is a front view of a divider. It is sectional drawing seen from the cut surface line DD of FIG. It is a front view of a chuck flange. It is a side view of a chuck flange. It is sectional drawing which looked at the chuck flange from cut surface line EE. It is a figure which shows the state which the chuck | zipper part opened. It is a figure which shows the state which the chuck | zipper part closed. It is a figure which shows the state which the chuck | zipper part hold | gripped the wheel. It is a figure which shows the state which the chuck | zipper part hold | gripped the wheel. It is a disassembled perspective view which shows the structure of a hydraulic unit. It is a hydraulic circuit diagram which shows the structure of the hydraulic system to which the hydraulic unit was connected. It is a figure for demonstrating operation | movement of the pressure detection part provided in a hydraulic circuit. It is a figure for demonstrating operation | movement of the pressure detection part provided in a hydraulic circuit. It is a figure for demonstrating operation | movement of the pressure detection part provided in a hydraulic circuit. It is a figure for demonstrating operation | movement of the pressure detection part provided in a hydraulic circuit. It is a figure for demonstrating operation | movement of the pressure detection part provided in a hydraulic circuit. It is a figure for demonstrating operation | movement of the pressure detection part provided in a hydraulic circuit. It is a front view of an operation part. It is a side view of an operation part. It is a flowchart for demonstrating operation | movement of a tire attachment / detachment apparatus. It is a flowchart for demonstrating operation | movement of a tire attachment / detachment apparatus. It is a flowchart for demonstrating operation | movement of a tire attachment / detachment apparatus. It is a block diagram for demonstrating the electrical structure of a tire attachment / detachment apparatus.

  FIG. 1 is a front view showing a tire attaching / detaching device 2 according to an embodiment of the present invention, FIG. 2 is a plan view of the tire attaching / detaching device 2, and FIG. 3 is a side view of the tire attaching / detaching device 2. In order to carry in a state where the wheel 5 on which the tire 3 of the automobile is mounted on the wheel 4 is erected so that the axis thereof is horizontal and to remove the tire 3 from the wheel 4 or to mount the tire 3 on the wheel 4 The tire attaching / detaching device 2 of this embodiment is used.

  In the present embodiment, the predetermined installation surface refers to a surface on which the tire attaching / detaching device 2 can be stably installed, such as a floor of an automobile repair shop and a floor of a loading platform of a tire repair work vehicle also called a service car. In addition, the term “horizontal” means a level in the strict sense perpendicular to the vertical line, and also includes errors in the operating environment such as the inclination of the floor of an automobile repair shop, the inclination of the loading platform of a tire repair work vehicle, etc. It shall mean horizontal in a typical sense.

  The wheel 5 is a large-diameter and heavy-weight wheel that is mounted on a large vehicle such as a bus, a truck, and a large special automobile, and has an outer diameter of 22.5 inches, 19.5 inches, and 17.5 inches. 4 is a wheel-mounted tire in which the tire 3 is mounted. In the following description, a wheel already-installed tire and a wheel-uninstalled tire on which no wheel is mounted may be simply referred to as a “tire”. The wheel-attached tire may be a pneumatic tire in which the tire 3 is reinforced with a carcass around the bead core of the bead portion, for example, from the tread portion to the sidewall portion.

  The tire attaching / detaching device 2 is used for an operator to roll and carry in a state where a wheel non-wearing tire is raised, to attach the wheel non-wearing tire to the wheel, or to remove the wheel wearing tire from the wheel. .

  The tire attaching / detaching device 2 includes a base 22 installed on a floor 21 that is a predetermined horizontal installation surface, a chuck device 300 mounted on the base 22, and a chuck device on one side of the base 22. 300, a guide press device 700 that is disposed in a direction parallel to the horizontal rotation axis L0 and has a first axis L1 on a first virtual vertical plane including the rotation axis L0, and a chuck device on the base 22 A tire support device 6 that is disposed between 300 and the guide press device 700 and supports the wheel non-attached tire or the wheel attached tire in an upright posture so that the central axis thereof is horizontal; A pair of guide shafts 26a and 26b provided on the base 22 adjacent to the chuck device 300 and the guide press device 700 and extending in parallel with the rotation axis L0 and movable to the pair of guide shafts 26a and 26b. And a moving frame body 27 mounted thereon.

  The base 22 has a substantially horizontally long rectangular shape in plan view shown in FIG. 2 and is made of a steel panel-like structure. The chuck device 300, the guide press device 700, the tire support device 6, and the like described above. The moving frame body 27 is disposed in a concave shape along the three sides of the base 22. With such a configuration, a work space in which the wheel-attached tire, the wheel-not-attached tire, and the wheel can be carried in or out between the chuck device 300 and the guide press device 700 and immediately before the tire support device 6. And a small tire attaching and detaching device 2 that realizes a small amount of movement of the worker as much as possible. Such a tire attaching / detaching device 2 requires only a small area for installation in a tire repair work vehicle such as an automobile repair shop, a gas station, or a service car, and can save space.

  The tire attaching / detaching device 2 is provided on the moving frame main body 27, and is moved around the third axis L3 parallel to the rotation axis L0 on the tire supporting device driving unit 17 that raises and lowers the tire supporting device 6 and the moving frame main body 27. A pair of bead rollers 28a and 28b which are provided so as to be angularly displaceable and press a tire bead portion of a wheel unattached tire or a wheel already-attached tire in a state in which the wheel 4 is partly fitted to the wheel 4 held by the holding body 44; A first position parallel to the rotation axis L0 and parallel to the rotation axis L0, in the direction A1 approaching the chuck device 300 and in the direction A2 away from the chuck device 300, and parallel to the rotation axis L0. A bead press device 800 capable of angular displacement about the biaxial line L2 and a tire for measuring the diameter of the tire 3 supported by the tire support device 6 Based on the tire diameter measured by the measuring device 1 and the tire diameter measuring device 1, the height distance from the base 22 of the central axis of the tire 3 supported by the tire supporting device 6, and the rotation axis of the main shaft 43 A control device 16 that calculates a difference between the height distance from the base 22 of L0 and controls the tire support device drive unit 17 so that the tire support device 6 moves by a movement amount corresponding to the calculated difference; Further included.

  The chuck device 300 includes a gripping body 44 that grips the wheel 4 in a posture in which the central axis thereof is parallel to the rotation axis L0, and a spindle that is rotationally driven around the rotation axis L0 and that the gripping body 44 is provided coaxially at the tip. 43.

  The guide press device 700 has a center point at the intersection of the second virtual vertical plane perpendicular to the first axis L1 and the first axis L1, and a virtual one arc line above the virtual horizontal plane including the first axis L1. A pair of guide press rollers 24a and 24b that are provided symmetrically with respect to the first virtual vertical plane, and above the virtual horizontal plane, away from the second virtual vertical plane toward the chuck device 300 and away from each other in the radial direction. A roller holder 741 that rotatably holds each of the guide press rollers 24a and 24b around two inclined axes L31 and L32 that are inclined in the direction to be symmetric with respect to the first virtual vertical plane, and a roller holder 741 Is moved in the direction A1 close to the chuck device 300 and the direction A2 away from the chuck device 300 along the rotation axis L0. And a less driving unit 742.

  The tire diameter measuring device 1 includes a tilting arm 11 whose base end portion is provided on the moving frame main body 27 so as to be angularly displaceable around a third axis L3 parallel to the rotation axis L0, and a tip end portion of the tilting arm 11. An abutting member 8 capable of moving in a direction approaching the tire 3 supported by the support device 6 and a direction away from the tire 3 from above, and an angle for measuring an angle around the third axis L3 of the tilting arm 11 Measuring instrument. The angle measuring device is realized by a rotary encoder.

  The left bead roller 28a in FIG. 1 is used when attaching a tire without a wheel to the wheel, and the right bead roller 28b is used when removing the tire. Basically, the tire 3 can be attached and detached by these bead rollers 28a and 28b. Since the tire attaching / detaching device 2 includes the guide press device 700, the tire side surface is pressed by the other bead roller 28 b and the opposite side is pressed by the guide press rollers 24 a and 24 b, and the bead portion of the tire 3 is pressed by the wheel 4. The tire 3 can be removed from the wheel 4 easily and without damaging the tire 3 by dropping it into the drop portion. In addition, when attaching a non-wheel tire to the wheel 4, the side wall portion of the tire 3 is pressed by one bead roller 28 a and the guide press rollers 24 a and 24 b of the guide press device 700 are pressed against the side surface of the tire 3. Thus, one bead portion can be fitted into the wheel 4. When the other bead portion is fitted into the wheel 4, the bead pressing member 817 of the bead press device 800 can be pressed against the side surface of the tire and the tire 3 can be rotated for mounting. As a result, the bead portion once fitted into the wheel 4 by the bead roller 28b is prevented from being detached from the wheel 4 even when the bead roller 28b is retracted.

  Further, since the tire attaching / detaching device 2 includes the tire supporting device 6, the height distance between the tire 3 and the wheel 4 mounted on the tire lifting body 465 is determined, and the distance for lifting the tire lifting body 465 is calculated. Therefore, the wheel 4 can be easily attached to the chuck device 300, and the tire 3 can be easily attached.

(Chuck device 300)
4 is an exploded perspective view showing the arm part 200 of the chuck device 300, and FIG. 5 is an exploded perspective view showing the chuck part 301. As shown in FIG. 6 is a cross-sectional view of the chuck portion 301, FIG. 7 is a front view of the chuck portion 301 as viewed from the left side of FIG. 6, and FIG. FIG. FIG. 9 is a front view of the divider 327, and FIG. 10 is a cross-sectional view taken along the section line DD of FIG. 11 is a front view of the chuck flange 312. FIG. 12 is a side view of the chuck flange 312. FIG. 13 is a cross-sectional view of the chuck flange 312 as viewed from the cutting plane line EE.

  The arm unit 200 includes a rail unit 202, a moving arm 203, a hydraulic motor 204, a square cylindrical frame main body 205, a top plate 206 provided so as to close an upper end opening of the frame main body 205, and a frame main body. And a rail fitting portion 207 provided at the lower end portion of 205.

  The double acting cylinder 209 has a piston rod 209a. The tip of the piston rod 209a is pin-coupled to the rail fitting portion 207 by the connecting pin 210. The double acting cylinder 209 is a hydraulic cylinder. When the piston rod 209a of the double-acting cylinder 209 extends, the moving arm 203 moves in a direction approaching the fixed frame main body 130, and when the piston rod 209a retracts, the moving arm 203 moves in a direction away from the fixed frame main body 130. .

  The hydraulic motor 204 has an output shaft 215, and a sprocket wheel 216 is fixed to the output shaft 215. A chain 217 is wound around the sprocket wheel 216. The chain 217 is also wound around the sprocket wheel 335 of the chuck portion 301 and is stretched between the sprocket wheels 216 and 335. The rotation of the output shaft 215 of the hydraulic motor 204 is transmitted from one sprocket wheel 216 to the main shaft 43 from the other sprocket wheel 335 via the chain 217.

  Referring also to FIG. 5, a chuck portion 301 is provided at the tip of the main shaft 43. The chuck portion 301 includes four pairs of connecting plates 302 and 303, a roller guide plate 307, a roller receiving member 308, a chuck flange 312, four link members 315, four chuck claws 305 that are gripping portions, and a cylinder case. 318, a piston 322 and a divider 327, a slip ring 333, and a sprocket wheel 335 are configured.

  The chuck flange 312 includes a disk-like base portion 314 and brackets 316 that protrude from the annular surface of the base portion 314 at an angular interval of 90 ° in the circumferential direction. Each bracket 316 includes a pair of plate-like portions 317, and one end portion of the link member 315 is pin-coupled to each plate-like portion 317 by a pin 319. Each plate-like portion 317 is also pin-coupled with a pair of connecting plates 302 and 303 made of a substantially triangular plate-like body by pins 323.

  The ends of the chuck claws 305 in the radial direction are pin-coupled to the tip ends of the pair of connecting plates 302 and 303 by pins 324. A radially inner end of each chuck claw 305 is pin-coupled to the other end of the link member 315 by a pin 325. The connecting plates 302 and 303, the link member 315, the chuck claw 305, and the bracket 316 constitute a parallelogram link by pins 319, 323, 324, and 325. The radially inner ends of the connecting plates 302 and 303 are connected by a pin 325, and a roller 309 is attached to the pin 325 between the connecting plates 302 and 303.

  Each roller 309 is sandwiched between a roller guide plate 307 and a roller receiving member 308. One end of the piston rod 328 in the axial direction is connected to the roller guide plate 307 and the roller receiving member 308. The other end in the axial direction of the piston rod 328 is fixed to the piston 322. The intermediate portion of the piston 322 is inserted through the chuck flange 312 in the thickness direction. The axis of such a piston 322 is parallel to the rotation axis L0.

  A space in the cylinder case 318 is partitioned into two piston chambers 329 a and 329 b by the piston 322. One piston chamber 329 a communicates with a first flow path 330 a formed in the cylinder case 318, and the first flow path 330 a communicates with a second flow path 330 b formed in the divider 327. A third flow path 330c formed in the divider 327 communicates with the other piston chamber 329b. The second and third flow paths 330b and 330c of the divider 327 communicate with the ports 331a and 331b of the slip ring 333 to which the sprocket wheel 335 is fixed.

  14 is a view showing a state in which the chuck portion 301 is opened, FIG. 15 is a view showing a state in which the chuck portion 301 is closed, and FIG. 16 is a view showing a state in which the chuck portion 301 grips the wheel 4a. FIG. 17 is a view showing a state where the chuck portion 301 holds the wheel 4b. The hydraulic oil supplied to one port 331a is supplied to the other piston chamber 329b via the third flow path 330c, and the pressure receiving surface of the piston 322 facing the other piston chamber 329b is pressurized. As a result, the hydraulic oil in one piston chamber 329a is pressurized by the piston 322, discharged from the other port 331b through the first flow path 330a and the second flow path 330b, and the piston rod 328 extends.

  The hydraulic oil supplied to the other port 331b is supplied to one piston chamber 329a via the second flow path 330b and the first flow path 330a, and the pressure receiving surface of the piston 322 facing the one piston chamber 329a has a pressure receiving surface. Pressurized. As a result, the hydraulic oil in the other piston chamber 329b is pressurized by the piston 322, is discharged from the one port 331a via the third flow path 330c, and the piston rod 328 is degenerated.

  When the piston rod 328 extends, each roller 309 between the roller guide plate 307 and the roller receiving member 308 is displaced forward, that is, in a direction close to the fixed frame main body 130 (left side in FIG. 86), and each chuck claw 305 is moved. The wheel can be gripped by moving in directions away from each other. When the piston rod 328 is retracted, the rollers 309 between the roller guide plate 307 and the roller receiving member 308 are driven to move rearward, that is, in a direction away from the fixed frame main body 130, and the chuck claws 305 are moved toward each other. It can be moved to release the gripping state of the wheel.

  18 is an exploded perspective view showing the configuration of the hydraulic unit U, and FIG. 19 is a hydraulic circuit diagram showing the configuration of the hydraulic system to which the hydraulic unit U is connected. 20 to 25 are diagrams for explaining the operation of the pressure detection unit 310 provided in the hydraulic circuit. The hydraulic unit U includes a tank 501 in which hydraulic oil is stored, a motor 502, a pump 503, a drain cooler 516, a strainer 505, electromagnetic valves V1 and V2, and a manifold 506. The motor 502 is an electric motor, and the pump 503 is a piston pump. The tank 501 includes a tank main body 507, an upper plate 508 mounted on the tank main body 507, and a unit cover 509 attached to the tank main body 507 so as to cover the upper plate 508 on the tank main body 507.

  When the motor 502 is driven, the pump 503 sucks the hydraulic oil in the tank 501 from the suction port via the strainer 505 and the hydraulic hose 511, and from the discharge port, the hydraulic hose 510, the manifold 506, the hydraulic hose 512, a plurality of It is supplied to a plurality of hydraulic cylinders C1 to C7 via electromagnetic valves V1 to V7 and a plurality of check valves V11 to V17. The hydraulic oil discharged from the hydraulic cylinders C1 to C7 is returned to the tank 501 through the check valves V11 to V17, the electromagnetic valves V1 to V7, the hydraulic hose 513, the manifold 506, and the hydraulic hose 514. A part of the hydraulic oil of the pump 503 is supplied from the tube 515 to the drain cooler 516 and cooled, and then returned from the tube 517 to the tank 501 so that the temperature of the hydraulic oil is controlled to maintain an appropriate temperature. The

  A pressure detection unit 310 is provided in a hydraulic fluid pipe supplied to the hydraulic cylinder C1 that drives the grip body 44 of the chuck device 300 via the electromagnetic valve V1 and the check valve V11. As the pressure detection unit 310, for example, a digital pressure switch DPS-10 manufactured by ASK Corporation is used. As shown in FIG. 20, when the pressure detection unit 310 detects a pressure higher than the pressure P2, the control device 16 turns on the output, and the pressure detected by the pressure detection unit 310 exceeds the range from the pressure P2 to W1. When the pressure becomes lower than the pressure P1, the output is turned OFF. In this way, as shown in FIG. 22, when the pressure detected by the pressure detector 310 is greater than 5 MPa, for example, the output can be reliably turned on, and when the pressure is less than 3 MPa, the output can be reliably turned off. can do. As shown in FIG. 22, when the pressure detection unit 310 detects a pressure higher than the pressure P4, the control device 16 turns off the output, and the pressure detected by the pressure detection unit 310 exceeds the range from the pressure P2 to W1. When the pressure becomes lower than the pressure P3, the output can be turned ON.

  As shown in FIG. 23, the control device 16 turns on the output when the pressure detection unit 310 detects a pressure higher than the pressure P6, and turns off the output when the pressure detection unit 310 detects a pressure higher than the pressure P8. And When the pressure detected by the pressure detection unit 310 exceeds the pressure P6 to W3 and becomes lower than the pressure P5, the control device 16 turns off the output, and the pressure detected by the pressure detection unit 310 When the pressure P8 exceeds the range of W4 and becomes lower than the pressure P7, the output is turned ON. In this way, as shown in FIG. 25, the output can be reliably turned OFF when the pressure detected by the pressure detection unit 310 is, for example, smaller than 5 MPa or larger than 8 MPa. In FIG. 24, the control device 16 turns off the output when the pressure detection unit 310 detects a pressure higher than the pressure P10, and turns the output on when the pressure detection unit 310 detects a pressure higher than the pressure P12. When the pressure detected by the pressure detection unit 310 exceeds the pressure P10 to W5 and becomes lower than the pressure P9, the control device 16 turns on the output, and the pressure detected by the pressure detection unit 310 is the pressure P12. To W6, the output can be turned OFF when the pressure is lower than the pressure P11.

  When the predetermined time has elapsed after the hydraulic cylinder C1 that drives the grip body 44 is driven, the control device 16 determines that the pressure of the hydraulic oil detected by the pressure detection unit 310 is the predetermined first pressure P1. When the pressure is equal to or lower than the predetermined second pressure P2 higher than the predetermined first pressure P1, the chuck device 300 is rotated, and the pressing corresponding to one wheel information selected by the input operation of the input unit is performed. The pressure of the hydraulic oil detected by the pressure detection unit 310 when a predetermined time has elapsed by controlling the pressing positions of the guide press rollers 24a and 24b, the bead pressing member 25 and the bead rollers 28a and 28b based on the position information. Is smaller than the predetermined first pressure P1 or larger than the predetermined second pressure P2, By switching the flow path of the hydraulic fluid supplied to the Sunda C1, the hydraulic cylinders C1 to homing. The predetermined time is the time required for the gripping body 44 to grip the wheel, for example, 2.5 seconds when the outer diameter of the wheel 4 is 22.5 inches, and the outer diameter of the wheel 4 is 19. In the case of 5 inches, the time is 2.0 seconds, and in the case where the outer diameter of the wheel 4 is 17.5 inches, the time is 1.5 seconds. The range between the first pressure P1 to be predetermined and the second pressure P2 to be predetermined is a pressure range required when the chuck claw 305 is gripping the wheel 4. The predetermined first pressure P <b> 1 is a pressure at which the chuck claw 305 can continue to hold the wheel 4. The predetermined second pressure P2 is a pressure at which excessive force does not act on the wheel 4 in consideration of the environment in which the tire attaching / detaching device is used.

  FIG. 26 is a front view of the operation unit 19, and FIG. 27 is a side view of the operation unit 19. The control device 16 is provided in a housing 71 that accommodates a part of the guide press device 700 and a part of the bead press device 800, and an operation unit 19 that constitutes an input unit is provided on the housing 71 on the front side (on the paper surface of FIG. 94). It is provided facing the vertical front side.

  The operation unit 19 is a change-over switch SW1 for switching between an automatic mode for automatically performing an assembling operation of a wheel-unattached tire to the wheel 4 and a removing operation of the wheel-attached tire from the wheel 4 and a manual mode for individually operating the wheel. Change-over switches SW2-SW7 used in the automatic mode, change-over switches SW8-SW19 used in the manual mode, change-over switches SW21-SW23 for switching the validity / invalidity of the flat tire mode, the hump crossing mode, and the light-point matching mode, There are provided indicator lights Lmp1 to Lmp3 that are lit when the changeover switches SW21 to SW23 are switched and become effective, and are turned off when they are invalid.

  The change-over switches SW1 to SW20 and the indicator lights Lmp1 to Lmp3 are provided on the front panel 173, and the change-over switches SW21 to SW23 are provided on the side panel 174.

  28 to 30 are flowcharts for explaining the operation of the tire attaching / detaching device 2. When the tire attaching / detaching operation of the wheel 5 is started, the wheel 5 is carried into the tire attaching / detaching device 2 by the operator, and is mounted on and supported by the tire supporting device 6 with the wheel 5 standing up. In this state, the tire support device 6 is disposed at a lowered position close to the base 22 by the tire support device drive unit 17, and the tilting arm 11 is separated from the tire 3 upward.

  Next, in order to measure the tire outer diameter, in step s1, the control device 16 extends the tilt cylinder 52, and the tilt arm 11 moves upward from the top 7 of the tire 3 as shown in FIG. 99 (1). The tilting arm 11 tilts from the separated position in a direction in which the angle θ with respect to the horizontal decreases, and in step s 2, the control device 16 reads a signal representing the angle θ from the angle measuring unit 14, so As shown in FIG. 99 (2), when the wheel 5 is in contact with the vicinity of the top 7 of the tire 3, a signal representing the angle θ is input from the angle measuring unit 14 to the control device 16. Further, the moving distance H1 detected by the height distance detecting device 15 is input to the control device 16, and the moving distance H2 that is the amount of increase is calculated by the formulas 1 and 2 described later in step s3.

  In step s4, the control device 16 outputs the moving distance H2 as a command value for the elevating cylinder 50, whereby the elevating cylinder 50 is driven, and the wheel 5 matches the central axis L5 on the axis L2 of the rotary drive device 13. As shown in FIG. 99 (3), the centering operation is finished up to the height distance.

  When the center axis L5 of the wheel 5 is arranged at a height distance that coincides with the axis L2 of the rotation drive device 13 as described above, the process proceeds to step s5, and the control device 16 moves the moving frame body 27 to the rotation drive device 13. The hydraulic fluid pressure P detected by the pressure detector 310 at the time when a predetermined time W has elapsed from the time when the hydraulic cylinder C1 is driven is moved to the adjacent side (right side in FIG. 1). Is equal to or higher than the predetermined first pressure P1 and lower than the predetermined second pressure P2, the control device 16 retracts the tilt cylinder 55 and moves the tilt arm 11 to the home position in step s7. And return to step s6.

  In step s6, when the predetermined time has elapsed, the pressure of the hydraulic oil detected by the pressure detection unit is smaller than the predetermined first pressure P1 or from the predetermined second pressure P2. If it is larger, in step s7, the flow path of the hydraulic oil supplied to the hydraulic cylinder C1 is switched to return the hydraulic cylinder C1 to the origin.

  After the elapse of a predetermined time, it is possible to determine whether or not the gripping body 44 is gripping the wheel 4 normally, so that it is not necessary for the operator to visually check and the labor of the worker is reduced. The time required for the chuck device 300 to grip the wheel 4 can be shortened. Preventing the tire 3 from being damaged by preventing the tire 3 from being removed from the wheel 4 or the process of attaching the tire 3 to the wheel 4 being started while the grip body 44 is not normally gripping the wheel 4 Can do.

  Next, when the separation operation from the wheel 4 of the already-attached tire 3 is input to the control device 16 as a selection command from the operation unit 19 by the tire attaching / detaching device 2, the operation after step s10 is executed and the rotation is performed. The drive device 13, the guide press device 700, and the bead press device 800 operate according to a sequence preset in the storage unit M.

  When the tilting arm 11 returns to the home position, in step s9, the control device 16 lowers the piston rod of the elevating cylinder 50 to the lower end position detected by the lower end sensor (not shown) of the elevating cylinder 50, and then step In s10, the rotation drive device 13 is driven to rotate the main shaft 43 and the gripping body 44. In step s11, the control device 16 moves the bead roller 28a to a predetermined pushing position. In step s12, the control device 16 operates the lubricant injection regulator 39. In step s13, the control device 16 is connected to the lubricant injection regulator 39. The lubricant is sprayed and attached to each sidewall portion and each tire bead portion of the tire 3 from the spray nozzle 40a.

  Next, in step s14, the control device 16 reads the predetermined push positions of the guide press rollers 24a and 24b from the storage unit M, and determines whether the flat tire mode changeover switch SW21 is on or off in step s15. If the changeover switch SW21 is on, the process proceeds to step s16, and the control device 16 reads the pushing position for the flat tire from the storage unit M. If the changeover switch SW21 is off, the process proceeds to step s17, where the guide press rollers 24a, 24b move to the predetermined pushing position described above, guide the tire 3 to the drop portion, and in step s18, the control device 16 Then, the push-in position of the first bead portion of the bead roller 28b is read, and it is determined in step s19 whether the changeover switch SW21 is on or off. If the changeover switch SW21 is on, in step s20, the control device 16 reads the pushing position of the first bead portion for the flat tire, and if the changeover switch SW21 is off, the bead roller 28b is turned on for the flat tire in step s21. The first bead portion is moved to the pushing position of the first bead portion, and the first bead portion is pushed out from the wheel 4.

  In step s22, the control device 16 moves the guide press rollers 24a and 24b to the origin position, and in step s23, reads the pushing position of the second bead portion of the bead roller 28b. Next, in step s24, the control device 16 determines whether the flat tire changeover switch SW21 is on or off. If the changeover switch SW21 is on, in step s25, the control device 16 controls the second bead portion. If the push-in position is read and the changeover switch SW21 is off, the control device 16 moves the bead roller 28b to the push-in position of the second bead unit in step s26.

  In step s27, the control device 16 raises the lifting cylinder 50 by the calculated moving distance H2, and in step s28, the control device 16 waits at the height position where the lifting cylinder 50 is lifted by the moving distance H2, and in step s29, The bead roller 28b is moved until it reaches the pushing position of the second bead portion.

  In step s30, the control device 16 raises the lifting frame 51 by the lifting cylinder 50 after T seconds, which is a predetermined time after reaching the pushing position of the second bead portion, and causes the tire 3 to be moved by the tire support device 6. After that, in step s31, the control device 16 controls the rotation driving device 13 to stop the rotation of the main shaft 43.

  In step s32, the control device 16 lowers the elevating cylinder 50 until the lower end sensor detects the tire support device 6, and in step s33, the control frame 16 moves the moving frame main body 27 to the origin position. When the moving frame body 27 returns to the origin position, the control device 16 ends the control in the automatic operation mode in step s34, and in step s35, the operator removes the tire 3 removed from the tire attaching / detaching device 2 and is already attached. The work of removing the tire from the wheel 4 is completed.

  FIG. 31 is a block diagram for explaining an electrical configuration of the tire attaching / detaching device 2. Signals from the angle measurement unit 14, the height distance detection device 15, the pressure detection unit 310, the changeover switches SW1 to SW19, SW21 to SW23, and the limit switch 65 are input to the control device 16, respectively. In response to the input signal, the operation of the elevating cylinder 50, the hydraulic motor 42, the rotation drive device 13, the guide press device 700, the bead press device 800, the elevating frame moving device 72, and each of the indicator lights Lmp1 to Lmp3 is controlled. .

DESCRIPTION OF SYMBOLS 1 Tire diameter measuring apparatus 2 Tire attachment / detachment apparatus 3 Tire 4 Wheel 5 Wheel 6 Tire support apparatus 7 Top part 11 Tilt arm 13 Rotation drive apparatus 14 Angle measurement part 15 Distance detection apparatus 16 Control apparatus 19 Operation part 21 Floor 22 Base 130 Fixed frame Main body 24a, 24b Guide press roller 26a Guide shaft 27 Traveling body 28a Bead roller 28b Bead roller 42, 204 Hydraulic motor 43 Main shaft 44 Grasping body 50 Lifting cylinder 51 Lifting frame 52 Tilt cylinder 65 Limit switch 71 Housing 200 Arm part 202 Rail part 300 Chuck device 305 Chuck claw 309 Roller 310 Pressure detection unit 316 Bracket 700 Guide press device 800 Bead press device 817 Bead pressing member H2 Travel distance L1 Axis L2 Axis L Axis L5 central axis SW1~SW23 changeover switch

Claims (3)

A chuck device for gripping a wheel of a wheel-mounted tire with a tire mounted on the wheel,
A spindle driven to rotate around a horizontal axis of rotation;
A hydraulic cylinder provided on the main shaft;
A chuck device having a plurality of gripping portions provided at the tip of the main shaft coaxially with the main shaft, inserted into the wheel, moved radially outward, and grips the wheel;
A hydraulic oil supply source for supplying hydraulic oil to the hydraulic cylinder via a conduit;
A pressure detector that is disposed in the pipe and detects the pressure of hydraulic oil supplied to the hydraulic cylinder;
A switching valve for switching the flow path of the hydraulic oil flowing through the pipeline;
A pressing body that moves parallel to the rotational axis to press the tire of the wheel-attached tire;
A control device,
The pressure of the hydraulic oil detected by the pressure detection unit when a predetermined time has elapsed since the supply of the hydraulic oil for moving the gripping portion radially outward to the hydraulic cylinder is started. In the case where the pressure is equal to or higher than the predetermined first pressure and equal to or lower than the predetermined second pressure higher than the first pressure, the movement of the pressing body is started.
When the pressure of the hydraulic oil detected by the pressure detection unit is lower than the first predetermined pressure or higher than the second predetermined pressure when the predetermined time has elapsed, And a control device that switches the switching valve to move the hydraulic cylinder to the origin.   2. The tire according to claim 1, wherein the predetermined time is a time required from when the supply of the hydraulic oil to the hydraulic cylinder is started until the gripping portion grips the wheel. Detachable device.   The tire attaching / detaching device according to claim 1 or 2, wherein the predetermined first pressure is a pressure at which the grip portion can grip the wheel.

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