Tire mounting / demounting device

Abstract

To provide a tire mounting / demounting device that enables even a broad flat tire whose cross sectional width is over 315 mm or an ultra-flat tire to be smoothly mounted on and demounted from a wheel, without damaging a tire inner pressure measuring instrument, while suppressing the tire from interfering with a valve raised from the wheel.SOLUTION: A tire mounting / demounting device 1 includes: chuck means E; lifting means 16; guide press rollers 23a and 23b; a pair of bead rollers 27a and 27b; a storing part 15b; a first input part; a second input part; a third input part; a rotation amount detecting part; and a control part 15 that reads out tire information, first push-in position information and second push-in position information which are stored in the storing part 15b, and operates the chuck means E, the lifting means 16, the guide press rollers 23a and 23b, and the pair of bead rollers 27a and 27b, in response to information inputted by the first input part, the second input part, and the third input part.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a tire mounting / removal device for mounting a wide-width low-profile tire or an ultra-low-profile tire used as a single tire for the rear wheel of a large truck onto or off of a wheel. [Background technology]

[0002] In recent years, ultra-flat tires with a wheel rim diameter of 17.5 to 22.5 inches, a tire section width of 445 mm or 455 mm, and a tire diameter of 1100 mm are sometimes used as single tires for the rear wheels of large trucks. Such wide-width ultra-flat tires have not been used in the past, so the tires targeted by the tire mounting and dismounting device of the prior art are low-profile tires or ultra-flat tires that have the same tire diameter as such wide-width ultra-flat tires but have a tire section width of 315 mm or less. Such a tire mounting and dismounting device of the prior art is described, for example, in Patent Document 1.

[0003] The tire mounting / removal device of Patent Document 1 includes a rotation drive means, a support means, a guide press roller, a bead roller, a lifting means, a memory unit, a first input unit, a second input unit, a readout unit, and a control means. The control means is configured to move the guide press roller to a first pushing position corresponding to either the flat tire mode or the hump crossing mode selected by the second input unit, and to move the bead roller to a second pushing position. When the light point matching mode is selected by the second input unit, the control means is configured to rotate the gripping unit by the rotation drive means, and to raise the support means by the lifting means to a position where only the tire stops relative to the rotating wheel. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6203770 Summary of the Invention [Problem to be solved by the invention]

[0005] The tire mounting / removal device of Patent Document 1 is unable to mount a wide-width low-profile tire or ultra-low-profile tire with a tire cross-sectional width of 445 mm or 455 mm on a wheel because the tire pushing amount and pushing force are insufficient. It is also unable to separate a low-profile tire or ultra-low-profile tire from a wheel because the tire pushing amount and pushing force are insufficient. Therefore, there is a demand for a tire mounting / removal device that can easily mount and remove a wide-width tire, even if the tire cross-sectional width exceeds 315 mm for an automobile, from a wheel.

[0006] In recent years, tires with tire pressure measuring devices (TPMS) attached to the wheels may be used. In such tires with tire pressure measuring devices, the pressure measuring device for measuring the tire pressure is wrapped around the wheel by a wire or a belt or other cable and housed in the space between the tire and the wheel. When a tire with a tire pressure measuring device is replaced using the tire mounting / removal device of Patent Document 1, the bead of the tire comes into contact with the tire pressure measuring device wrapped around the wheel with a large force, damaging the tire pressure measuring device, both when the tire is removed from the wheel and when the tire is mounted on the wheel. This causes a problem that the tire mounting / removal device of Patent Document 1 cannot be used to replace a tire with a tire pressure measuring device in automatic mode.

[0007] Furthermore, the tire mounting / removal device of Patent Document 1 does not have a valve avoidance function for smoothly removing the tire from the wheel without interfering with the valve that protrudes from the outer circumferential surface of the wheel, so there is a problem that the tire gets caught on the valve when removing the tire, making it impossible to perform tire replacement work in automatic mode.

[0008] Therefore, the object of the present invention is to provide a tire mounting / removal device that can easily mount and remove even wide low-profile tires or ultra-low-profile tires from wheels. Another object of the present invention is to provide a tire mounting / removal device that can smoothly mount and remove tires even if the tire is equipped with a tire pressure gauge. Still another object of the present invention is to provide a tire mounting / removal device that can smoothly mount and remove tires without getting caught on the valves provided on the wheels. [Means for solving the problem]

[0009] The present invention relates to a wheel chuck having a gripping portion for detachably gripping a wheel on which a tire having a tire section width exceeding 315 mm can be mounted, and a rotation drive portion for rotating the gripping portion about a horizontal rotation axis; a lifting means for lifting and lowering the tire stand with the tire mounted thereon; a guide press roller capable of pressing the first bead portion of the tire toward the second bead portion; a pair of bead rollers, either one of which can press either the first bead portion or the second bead portion; A storage unit that stores tire information that individually represents a plurality of types of tires having at least different tire diameters and tire section widths, wheel information that individually represents a plurality of types of wheels having at least different rim section widths and rim diameters, first pushing position information that individually represents a first pushing position of the guide press roller corresponding to the plurality of types of tires, and second pushing position information that individually represents a second pushing position of the pair of bead rollers corresponding to the plurality of types of tires, associated with the tire information; a first input unit for selecting one of a mounting mode for mounting the tire on the wheel and a removal mode for removing the tire from the wheel; A second input section for selecting a rim diameter and a rim section width of the wheel; a third input unit for selecting one of the valve avoidance mode and the light point alignment mode; a rotation amount detection unit provided in the rotation drive unit and detecting an amount of rotation of the grip unit about the rotation axis; a control unit that reads out the tire information, first pushing position information, and second pushing position information stored in the memory unit in response to information selected by the first input unit, the second input unit, and the third input unit, and operates the chuck means, the lifting means, the guide press roller, and the bead roller.

[0010] The present invention further includes an intrusion detection means that is provided to define a detection area facing the lifting means and the gripping portion from one side, and outputs a detection signal when an object intrudes into the detection area, The control unit is configured to stop at least the rotational operation of the rotation drive unit and the lifting and lowering operation of the tire stand in response to a detection signal from the intrusion detection means.

[0011] In addition, the present invention further includes a display unit capable of displaying image information, The control unit is characterized in that, in response to information selected by the first input unit, the second input unit, and the third input unit, it causes the display unit to display image information indicating the content of the work to be performed.

[0012] The present invention is also characterized in that it further includes a plate-shaped tire guide member that is arranged on the tire stand, inclines downward from the intersection between the upper surface and one side of the tire stand located at the lower limit as it moves away from the intersection, and has a tip that is supported on the floor surface.

[0013] In the invention, the control unit moves the pair of bead rollers in the axial direction of the bead rollers in response to the rim diameter and rim cross-sectional width selected by the second input unit.

[0014] The present invention is also characterized in that it further includes a pushing device disposed on the lifting means and pushing the tire placed on the tire stand in a direction in which the tire rotates and moves outward from the tire stand. Effect of the Invention

[0015] According to the present invention, the first input unit selects either the mounting mode or the removal mode. The second input unit inputs the rim diameter and the rim section width of the wheel. The third input unit sets either the valve avoidance mode or the light point alignment mode. In response to the information selected by the first input unit, the second input unit, and the third input unit, the control unit reads out the corresponding tire information, the first pushing position information, and the second pushing position information from the storage unit, and operates the chuck means, the lifting means, the guide press roller, and the bead roller. Therefore, even if the tire has a wide tire whose tire section width exceeds a predetermined value, for example, 315 mm, the control unit executes appropriate operation control corresponding to the corresponding tire from the tire information stored in the storage unit, and causes the guide press roller and the pair of bead rollers to execute the operation selected by the first input unit, the second input unit, and the third input unit, so that the tire can be easily mounted on the wheel and removed from the wheel. When the valve avoidance mode is set by the third input unit, the control unit controls the chuck means, lifting means, guide press roller, and bead roller to operate so that the tire does not get caught on the valve, thereby allowing the tire to be attached and detached smoothly.

[0016] In addition, according to the present invention, the tire mounting / removing device includes an intrusion detection means, and the control unit stops at least the rotational operation of the rotation drive unit and the lifting and lowering operation of the tire stand in response to a detection signal from the intrusion detection means. Therefore, even if a worker accidentally enters the detection area during work, the rotation of the gripping unit, which is rotationally driven by the rotation drive unit, and the tire and wheel gripped by the gripping unit are stopped, and the lifting and lowering operation of the tire stand on which the tire is placed is stopped, thereby improving safety.

[0017] In addition, according to the present invention, the control unit displays image information indicating the work to be performed on the display unit in response to information selected by the first input unit, the second input unit, and the third input unit. Therefore, by looking at the content displayed on the display unit, the worker can predict the operation of the various components of the tire mounting / removal device, thereby enabling the worker to prepare for the next operation of the various components to be performed, improving workability and safety.

[0018] In addition, according to the present invention, a tire guiding member is provided on the tire stand, so that the worker can manually rotate the tire and move it from the floor surface onto the tire stand via the tire guiding member, or from the tire stand to the floor surface. This makes it easier to load even heavy tires onto the tire stand by overcoming the step between the floor surface and the upper surface of the tire stand, or to lower the tire from the tire stand to the floor surface, thereby reducing the burden of the task of lifting and lowering tires onto and from the tire stand.

[0019] In addition, according to the present invention, the control unit moves the pair of bead rollers in the axial direction in response to the rim diameter and rim cross-sectional width selected by the second input unit, so that even if the wheels are of different sizes, the pair of bead rollers are prevented from contacting the wheel, and the tire sidewall can be reliably and appropriately pressed in.

[0020] In addition, according to the present invention, the lifting means is provided with an ejection device, so that even heavy tires can be easily and reliably ejected from the tire stand, thereby reducing the workload of workers. [Brief description of the drawings]

[0021] [Figure 1] FIG. 1 is a front view showing a tire mounting / removal device 1 according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a plan view of the tire mounting / removal device 1. [Diagram 3] FIG. 2 is a cross-sectional view taken along the line III-III in FIG. [Figure 4]FIG. 2 is a side view of the tire mounting / removal device 1 as viewed from the left in FIG. [Diagram 5] FIG. 2 is a front view showing the input device 500. [Figure 6] FIG. [Figure 7] 5A and 5B are diagrams showing a manual home screen displayed on a display unit 505 of the input device 500. [Figure 8] FIG. 13 is a diagram showing an automatic tire mounting home screen displayed on a display unit 505. [Figure 9] FIG. 13 is a diagram showing an automatic driving transition screen displayed on a display unit 505. [Figure 10] 13 is a diagram showing an automatic tire detachment home screen displayed on a display unit 505. FIG. [Figure 11] 5A to 5C are diagrams showing an operation status confirmation screen displayed on the display unit 505. [Figure 12] FIG. 13 is a diagram showing an automatic wheel attachment home screen displayed on a display unit 505. [Figure 13] 13 is a diagram showing an operation correction setting screen displayed on a display unit 505. FIG. [Figure 14] 13 is a diagram showing an automatic wheel release home screen displayed on the display unit 505. FIG. [Figure 15] FIG. 13 is a diagram showing an abnormality display screen displayed on the display unit 505. [Figure 16] FIG. 2 is a block diagram of a control unit 15. [Figure 17] FIG. 2 is a hydraulic circuit diagram of the tire mounting / removal device 1. [Figure 18] 2 is an exploded perspective view showing the configuration of a main body frame portion A. FIG. [Figure 19] 13 is an exploded perspective view showing the configuration of a lifting drive unit B. FIG. [Figure 20] 4 is an exploded perspective view showing the configuration of a light curtain unit C. FIG. [Figure 21] 13 is an exploded perspective view showing the configuration of an arm portion D. FIG. [Figure 22] FIG. 2 is an exploded perspective view showing the configuration of a chuck means E. [Diagram 23] FIG. 2 is an exploded perspective view showing the configuration of a tool unit F. [Figure 24] 1 is an exploded perspective view showing the configuration of a tilting arm drive unit G. FIG. [Diagram 25] FIG. 2 is an exploded perspective view showing the configuration of a guide press portion H. [Figure 26] FIG. 2 is an exploded perspective view showing the configuration of a bead press section I. [Figure 27] 13 is a side view showing the configuration of a connecting cylinder portion J. FIG. [Figure 28] 28 is a front view of the connecting cylinder portion J as viewed from the right in FIG. 27. [Figure 29] 1 is an exploded perspective view showing the configuration of a connecting cylinder portion J. FIG. [Diagram 30] FIG. 2 is an exploded perspective view showing the configuration of a control unit 15. [Diagram 31] 2 is an exploded perspective view showing the configuration of a bead cream spouting portion M. FIG. [Figure 32A] FIG. 2 is a diagram showing a state before a tire 2 is dispensed by a dispensing device 30. [Figure 32B] 4 is a diagram showing a state in which a tire 2 is dispensed by a dispensing device 30. FIG. [Diagram 33] 13 is a diagram showing a state in which the rotation of the tire 2 is prevented by the dispensing device 30. FIG. [Figure 34A] 13 is a diagram showing a state at the start of removal of a tire by a guide press roller 23a. FIG. [Figure 34B] 13 is a diagram showing a state in which the guide press roller 23a has discharged the tire 2 to a first discharging position. FIG. [Figure 35A] 11 is a diagram showing a state in which a tire is pushed in by the tire mounting / removal device 1 in the hump-crossing mode. FIG. [Figure 35B] FIG. 35B is a side view seen from the left in FIG. 35A. [Diagram 36] 5 is a flowchart for explaining the operation of the tire mounting / removal device 1 to go over a hump. [Figure 37] 5 is a flowchart for explaining the operation of the tire mounting / removal apparatus 1 in a valve avoidance mode. [Figure 38] 5 is a flowchart for explaining the operation of the tire mounting / removal apparatus 1 in a valve avoidance mode. [Figure 39]4 is a flowchart for explaining the light point matching operation of the tire mounting / removal apparatus 1. [Diagram 40] 4 is a cross-sectional view showing an example of installation of a tire internal pressure measuring device 19. FIG. [Figure 41A] 5A to 5C are diagrams for explaining the operation of the tire mounting / removal device 1 in a valve avoidance mode. [Figure 41B] 5A to 5C are diagrams for explaining the operation of the tire mounting / removal device 1 in a valve avoidance mode. [Figure 42A] 10 is a cross-sectional view showing an example of damage to a tire internal pressure measuring device 19 when a tire is removed. [Figure 42B] 1 is a cross-sectional view showing an example of damage to a tire internal pressure measuring device 19 when a tire is attached to a vehicle. [Diagram 43] 5A to 5C are diagrams for explaining the operation of the tire mounting / removal device 1 in a valve avoidance mode. [Diagram 44] 5A to 5C are diagrams for explaining the operation of the tire mounting / removal device 1 in a valve avoidance mode. [Figure 45A] 5 is a cross-sectional view for explaining the operation of the tire mounting / removal device 1 in a valve avoidance mode. FIG. [Figure 45B] FIG. 4 is a side view for explaining the operation of the tire mounting / removal device 1 in the valve avoidance mode. [Figure 46A] 4 is a cross-sectional view for explaining the operation of the tire mounting / removal device 1 in a hump crossing mode. FIG. [Figure 46B] FIG. 4 is a side view for explaining the operation of the tire mounting / removal device 1 in the valve avoidance mode. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] FIG. 1 is a front view showing a tire mounting / removal device 1 according to an embodiment of the present invention, FIG. 2 is a plan view of the tire mounting / removal device 1, FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 1, and FIG. 4 is a side view of the tire mounting / removal device 1 taken from the left side in FIG. 1. The tire mounting / removal device 1 according to this embodiment is used to mount an ultra-flat tire (hereinafter sometimes abbreviated as "tire") 2 having a rim section width of 455 mm used as a single rear tire for large vehicles such as large trucks on a wheel 3, or to remove the tire 2 from the wheel 3. The vehicle on which the tire 2 is mounted is not limited to a large truck, but may be, for example, a bus or other large work vehicle. In this embodiment, the ultra-flat tire refers to a tire having an aspect ratio of, for example, 55% or less.

[0023] The tire mounting / removal device 1 of this embodiment includes a tire stand 5 that supports the tire 2, which is a low-profile tire or an ultra-low-profile tire, in an upright state, a tilting arm 10 that has a free end 7 that contacts the vicinity of the top 6 of the tire 2 supported in an upright state on the tire stand 5 and a base end 8 that is rotatably connected about a horizontal axis L1 to an upper part of a support 9 that can be raised and lowered relative to the tire stand 5, and has a height position specifying means 11 that specifies the height position of the top 6 of the tire 2, a chuck means E that has a rotation drive unit 12 that rotates the tire 2 about the horizontal axis L2 while holding the wheel 3, and an inclination angle θ of the tilting arm 10 with respect to the horizontal (hereinafter, when simply referred to as "angle θ") the tilt angle θ of the tilt arm 10 detected by the tilt angle detection means 13 and the height distance H1 detected by the height distance detection means 14; a control unit 15 shown in FIG. 16 described later functioning as a movement distance calculation means for calculating a movement distance H2 in the height direction from the central axis of the tire 2 placed on the tire stand 5 to the axis L2 of the rotation drive unit 12 based on the tilt angle θ of the tilt arm 10 detected by the tilt angle detection means 13 and the height distance H1 detected by the height distance detection means 14; lifting and lowering means 16 for moving the tire stand 5 by the movement distance H2 calculated by the control unit 15; and an input device 500.

[0024] Such a tire mounting / removing device 1 includes a base 21 installed on a horizontal floor 20 of, for example, an automobile repair shop, a support 22 erected on one side of the base 21 in the longitudinal direction (left-right direction in FIG. 1), a tire pushing means 23 provided on the upper part of the support 22 and having a pair of guide press rollers 23a, 23b, a tire pressing means 24 provided on the tire pushing means 23 and having a pressing member 24a, a pair of guide rails 25a, 25b provided on the base 21 and extending in parallel along the longitudinal direction of the base 21, a movable body 26 running along each of the guide rails 25a, 25b, a pair of bead rollers 27a, 27b provided on the movable body 26 with a gap therebetween in the longitudinal direction, and a hydraulic pressure generating device 28 that supplies pressure oil of a predetermined pressure for driving hydraulic cylinders CY1 to CY7 described later.

[0025] 5 is a front view showing an input device 500. The input device 500 includes a hollow rectangular parallelepiped housing 50, a display unit 505 provided on a front wall 50a of the housing 50, and a plurality of changeover switches SW21 to SW40. The display unit 505 may be configured, for example, by attaching an optical film and a touch panel to a liquid crystal display element. Among the plurality of changeover switches SW21 to SW40, the changeover switches SW24 to SW27 for automatic mode are disposed on the left side of the display unit 505 in a front view, and the changeover switches SW21 to SW23 for basic operations are disposed below the display unit 505. The changeover switches SW28 to SW40 for manual mode are disposed on the right side of the display unit 505.

[0026] The change-over switch SW21 is for selecting either the automatic mode or the manual mode when the tire mounting / removing apparatus 1 performs work. The change-over switch SW22 is for starting work by the tire mounting / removing apparatus 1. The change-over switch SW23 is a switch for emergency stop of the tire mounting / removing apparatus 1 in the event of an emergency.

[0027] The changeover switch SW24 is an operation switch for selecting either the work of mounting a tire on a wheel or the work of removing a tire from a wheel. The changeover switch SW25 is an operation switch for selecting the rim diameter of the target wheel to be one of 17.5 inches, 19.5 inches, and 22.5 inches. The changeover switch SW26 is an operation switch for selecting the rim cross-sectional width of the wheel to be one of 6.00 inches, 6.75 inches, 7.50 inches, 8.25 inches, 11.75 inches, 14.00 inches, 19.5-6.75 OFF:147, 9.00 OFF:117, and 90.00 OFF:175. Note that the above "OFF:~" indicates that the wheel offset amount is "+~mm". The changeover switch SW27 is an operation switch for selecting whether the tire mounting / removal work is front removal or back removal.

[0028] The changeover switch SW28 is an operation switch for selecting the moving direction of the moving body 26 to either forward or backward. The changeover switch SW29 is an operation switch for selecting the gripping part 18 to either open or closed. The changeover switch SW30 is an operation switch for operating the bead rollers 27a, 27b to either retract or extend. The changeover switch SW31 is an operation switch for operating the lift up / down cylinder CY6 to either retract or extend. The changeover switch SW32 is an operation switch for operating the tire pressing means 24 to either retract or extend. The changeover switch SW33 is an operation switch for operating the support body 22 to either lift or lower. The changeover switch SW34 is an operation switch for operating the tire table 5 to either lift or lower. The changeover switch SW35 is an operation switch for selecting the moving direction of the chuck table to either forward or backward. The change-over switch SW36 is for moving the tire pushing means 23 in its axial direction to position it in accordance with the wheel diameter. The change-over switch SW37 is an operation switch for selecting either retraction or extension of the guide press plate 531. The change-over switch SW38 is an operation switch for selecting either the forward or reverse movement direction of the pressing member 24a provided in the tire pressing means 24. The change-over switch SW39 is an operation switch for selecting either the forward or reverse rotation direction of the tire 2. The change-over switch SW40 is an operation switch for selecting either retraction or extension of the dispensing member 495 of the dispensing device 30.

[0029] FIG. 6 is a plan view showing the foot switch unit 200. The tire mounting / removal device 1 includes a foot switch unit 200 that is operated by an operator with his / her foot. The foot switch unit 200 includes three foot switches Pd1, Pd2, and Pd3. The foot switch Pd1 is for raising or lowering the lift frame 209. When the operator steps on the foot switch Pd1 once, it becomes an upward command, and when the operator continues to step on the foot switch Pd1 once more, it switches to a downward command. The foot switch Pd2 is for operating the support 22 to either raise or lower. When the operator steps on the foot switch Pd2, it can raise or lower the support 22 depending on the state of the limit switch 804. The foot switch Pd3 is for retracting or extending the dispensing member 495. When an operator depresses the foot switch Pd3, the dispensing member 495 extends and presses against a tire on the tire stand 5, dispensing the tire. This dispensing operation is maintained by the control device 15a for a dispensing extension time stored in the memory unit 15b. When the extension time has elapsed, the control device 15a causes the dispensing member 495 to retract.

[0030] FIG. 7 is a diagram showing a manual home screen displayed on the display unit 505 of the input device 500. The display unit 505 has a rectangular display surface, on which a transparent touch panel sheet is attached. When the manual mode is selected by the above-mentioned changeover switch SW21, a "manual" image C1 indicating that the manual mode has been selected is displayed in the upper region of the display surface of the display unit 505, as shown in FIG. 7. Next to the "manual" image C1, a "monitor" image C2 for transitioning to an operation status confirmation screen shown in FIG. 11 described later by pressing the image is displayed. In addition, an "abnormality display" image C3 for transitioning to an abnormality display screen shown in FIG. 15 described later by pressing the image is displayed in the upper right corner of the display surface of the display unit 505. Below the "manual" image C1, a "rim diameter" image C4 indicating the rim diameter selected by the changeover switch SW25, for example, "22.5", is displayed. Below the "rim diameter" image C4, a "return to origin mode" image C5, which indicates the manual menu, a "hydraulic unit always on" image C6, a "hydraulic unit always on release" image C7, a "cream manual injection" image C8, a "line laser always on" image C9, and a "line laser always on release" image C10 are displayed. Below these images C5 to C10, a "moving platform origin" image C11, which indicates whether the machine origin has been confirmed, a "lift bottom end" image C12, a "tire support origin" image C13, a "tire rotation origin" image C14, and a "tire platform detection" image C15 are displayed. If each origin has been confirmed, the lamps above each image C11 to C15 are lit, and if not, they remain unlit. Below these images C11 to C15, an "emergency stop button" image C16, which indicates the occurrence of an abnormality, a "thermal abnormality" image C17, which indicates an excessive temperature rise, and a "insufficient amount of cream" image C18, which indicates that the amount of bead cream stored is insufficient, are displayed. If an abnormality occurs, an alarm lamp above each of the images C16 to C18 lights up to notify the user.

[0031] Fig. 8 is a diagram showing an automatic tire mounting home screen displayed on the display unit 505. When the automatic mode is selected by the change-over switch SW21, an "automatic tire mounting" image C19 indicating the driving mode selected by the change-over switch SW24 is displayed in the upper region of the display surface of the display unit 505. Next to the "automatic tire mounting" image C19, a "monitor" image C20 for transitioning to an operation status confirmation screen shown in Fig. 11 described later by pressing it, a "driving correction" image C21 for transitioning to a driving correction setting screen shown in Fig. 13 described later by pressing it, and an "abnormality display" image C22 for transitioning to an abnormality display screen shown in Fig. 15 described later by pressing it are displayed. Below these images C19 to C22, a "wheel size" image C23 showing the wheel size selected by the changeover switch SW25, for example, "22.5", a "wheel width" image C24 showing the wheel width selected by the changeover switch SW26, for example, "8.25", and a "cutting direction" image C25 showing the cut-out direction selected by the changeover switch SW27, for example, "reverse" are displayed. Below these images C23 to C25, a "light point alignment mode" image C26, a "valve avoidance mode" image C27, and a "flat tire mode" image C28 showing the operation menu are displayed. When the operator presses any of these images C26 to C28, one of the lamps above the images C26 to C28 of the selected mode is turned on, and the selected mode is notified. Below these images C26 to C28, a “Work Information” image C29 is displayed, which shows the work status using structural diagrams and text of the operating parts corresponding to the above-displayed images C19 to C28, and below the “Work Information” image C29, as operation correction status, the correction amount of the chucking position is displayed as a “Correction Value” image C30, the correction amount of the first bead assembly position is displayed as a “Correction Value” image C31, the correction amount of the guide press push-in amount is displayed as a “Correction Value” image C32, and the correction amount of the second bead assembly position is displayed as a “Correction Value” image C33.

[0032] Fig. 9 is a diagram showing an automatic driving transition screen displayed on the display unit 505. When the automatic mode is selected by the changeover switch SW21, an "automatic tire detachment" image C34 indicating the driving mode selected by the changeover switch SW24 as, for example, "automatic tire detachment", a "monitor" image C35 for transitioning to an operation state confirmation screen shown in Fig. 11 described later by pressing it, a "driving correction" image C36 for transitioning to a driving correction setting screen shown in Fig. 13 described later by pressing it, and an "abnormality display" image C37 for transitioning to an abnormality display screen shown in Fig. 15 described later by pressing it are displayed in the upper region of the display surface of the display unit 505. Below these images C34 to C37, there are displayed a "wheel size" image C38 showing the wheel size selected by the changeover switch SW25, for example, "22.5", a "wheel width" image C39 showing the wheel width selected by the changeover switch SW26, for example, "8.25", and a "pull direction" image C40 showing the pull direction selected by the changeover switch SW27, for example, "reverse". Below these images C38 to C40, there are displayed an "automatic cream spray" image C41 showing a mode for automatically spraying bead cream, which is an operation menu, a "valve avoidance mode" image C42, and a "flat tire mode" image C43, and when the operator presses any of these images C41 to C43, a light lamp above any of the images C41 to C43 of the selected mode is turned on, and the selected mode is displayed. Below these images C41 to C43, an "explanation" image C44 is displayed in the flowchart, which shows the corresponding action during automatic operation, such as "Lift lift", "Mobile table chuck position", and "Chucking", and below this image C44, a chucking position "correction value" image C45, a first bead removal position "correction amount" image C46, ​​a guide press push-in position "correction amount" image C47, and a second bead removal position "correction amount" image C48 are displayed, which show the operation correction status.

[0033] 10 is a diagram showing an automatic tire removal home screen displayed on the display unit 505. When the automatic mode is selected by the changeover switch SW21, an "automatic tire removal" image C49 indicating the driving mode selected by the changeover switch SW24, a "monitor" image C50 for transitioning to an operation state confirmation screen shown in FIG. 11 described later by pressing the image, a "driving correction" image C51 for transitioning to a driving correction setting screen shown in FIG. 13 described later by pressing the image, and an "abnormality display" image C53 for transitioning to an abnormality display screen shown in FIG. 15 described later by pressing the image. Below these images C49 to C52, a "wheel size" image C53 indicating the wheel size selected by the changeover switch SW25, for example, "22.5", a "wheel width" image C54 indicating the wheel width selected by the changeover switch SW26, for example, "8.25", and a "removal direction" image C55 indicating the removal direction selected by the changeover switch SW27, for example, "reverse" are displayed. Below these images C53 to C55, an "automatic cream spray" image C56, which indicates a mode for automatically spraying bead cream, and a "valve avoidance mode" image C57 and a "flat tire mode" image C58 are displayed. Below these images C56 to C58, a "work information" image C59 is displayed, which indicates a work using the operating parts and text corresponding to the above-displayed images C49 to C59, and below this "work information" image C59, a "correction amount" image C60 indicating the correction amount of the chucking position as the operation correction status, a "correction amount" image C61 indicating the correction amount of the first bead removal position, a "correction amount" image C62 indicating the correction amount of the guide press push-in position, and a "correction amount" image C63 indicating the correction amount of the second bead removal position are displayed.

[0034] 11 is a diagram showing an operation status confirmation screen displayed on display unit 505. In the upper region of the display surface of display unit 505, a title "operation status" image C64 indicating that it is information about the operation status, and a "back" image C65 indicating a button to return to each home screen are displayed. Below these images C64, C65, a "back" image C66, a "motor / hydraulic SV" image C67, and a "next" image C68 are displayed. Below these images C66 to C68, a plurality of "name" images C69 indicating the name of each device and a plurality of "operation" images C70 indicating the operation status of the "name" images C69 by lighting them up are displayed, for example, in a matrix form.

[0035] 12 is a diagram showing an automatic wheel attachment home screen displayed on the display unit 505. When the automatic mode is selected by the changeover switch SW21, an "automatic wheel attachment" image C71 indicating the driving mode selected by the changeover switch SW24, a "monitor" image C72 for transitioning to the operation state confirmation screen shown in FIG. 11 by pressing, a "driving correction" image C73 for transitioning to the driving correction setting screen shown in FIG. 13 by pressing, and an "abnormality display" image C74 for transitioning to the abnormality display screen shown in FIG. 15 by pressing. Below these images C71 to C74, a "wheel size" image C75 indicating the wheel size selected by the changeover switch SW25, for example, "22.5", a "wheel width" image C76 indicating the wheel width selected by the changeover switch SW26, for example, "8.25", and a "drawing direction" image C77 indicating the drawing direction selected by the changeover switch SW27, for example, "reverse" are displayed. Below these images C75-C777, a "Work Information" image C78 is displayed showing the work content by structural diagrams and text of the working parts corresponding to the above-displayed images C71-C77. Below this image C78, ​​a "Correction Amount" image C79 showing the correction amount of the chucking position is displayed as the operation correction status.

[0036] 13 is a diagram showing a driving correction setting screen displayed on the display unit 505. In the upper region of the display surface of the display unit 505, a title "driving correction" image C80 indicating that the information is related to driving correction is displayed, and a "back" image C81 indicating a button to return to each home screen is displayed. Under each of the images C80 and C81, a "back" image C82, a "position correction" image C83, and a "next" image C84 are displayed. Under each of the images C82 to C84, a plurality of "name" images C85 indicating the correction location and a plurality of "correction amount" images C86 indicating the correction amount of the correction location indicated by each image C85 are displayed, for example, in a table format.

[0037] 14 is a diagram showing an automatic wheel release home screen displayed on the display unit 505. When the automatic mode is selected by the changeover switch SW21, the upper area of ​​the display surface of the display unit 505 displays an "automatic wheel release" image C87 indicating the driving mode selected by the changeover switch SW24, a "monitor" image C88 for transitioning to the operation state confirmation screen shown in FIG. 11 by pressing, a "driving correction" image C89 for transitioning to the driving correction setting screen shown in FIG. 13 by pressing, and an "abnormality display" image C90 for transitioning to the abnormality display screen shown in FIG. 15 by pressing. Below these images C87 to C90, a "wheel size" image C91 indicating the wheel size selected by the changeover switch SW25, for example, "22.5", a "wheel width" image C92 indicating the wheel width selected by the changeover switch SW26, for example, "8.25", and a "removal direction" image C93 indicating the removal direction selected by the changeover switch SW27, for example, "reverse" are displayed. Below these images C91-C93, a "Work information" image C94 is displayed showing the work content by structural diagrams and text of the operating parts corresponding to the above-displayed images C87-C93. Below the image C94, a "correction amount" image C95 of the chucking position is displayed as the operation correction status.

[0038] FIG. 15 is a diagram showing an abnormality display screen displayed on the display unit 505. In the upper region of the display surface of the display unit 505, a "Back" image C96 indicating a button for returning to each home screen is displayed. Under this image C96, an "Abnormality Display" image C97 is displayed as a title display. Under this image C97, a "Status" image C98 is displayed to display an abnormality situation that is occurring, for example, "Emergency Stop Operation". Under the image C98, an "Abnormality Information" image C99 is displayed to display history information of the abnormality that has occurred, such as the date and time of the abnormality occurrence and the type of abnormality, for example, "07 / 20 15:50:50 Emergency Stop Operation", "07 / 29 15:58;50 Emergency Stop Operation", and "7 / 29 09:44:57 Safety Curtain Abnormality". Under the image C99, a "History Delete" image C100 for deleting the displayed history information is displayed. When the operator presses this image C100, the displayed abnormality information is deleted.

[0039] 16 is a block diagram of the control unit 15. The control unit 15 includes a control device 15a and a storage unit 15b. The control device 15a is composed of, for example, a central processing unit (CPU). The storage unit 15b is composed of memories such as a random access memory (RAM) and a read only memory (ROM) to which the control device 15a reads and writes. The control device 15a receives output signals from the inclination angle detection means 13a, the rotation angle detection means 13b, the lift height distance detection means 13c, the moving table movement distance detection means 13d, the guide press movement distance detection means 13e, the bead press movement distance detection means 13f, the tire support origin limit switch 13g, the moving table origin limit switch 13h, the tire / wheel detection limit switch 13i, the proximity switch 13j, the safety curtain 13k, the hydraulic sensor for detecting chuck abnormalities 13m, the cream amount deficiency detection sensor 13n, the foot switch unit 200, the physical changeover switch 13o on the operation panel, and the virtual changeover switch 13p on the touch panel. In response to each input output signal, the control device 15a controls and operates the hydraulic unit motor M2, the tire rotation motor M1, each hydraulic cylinder CY1 to CY7, each air cylinder CY11 to CY18, the cream application valve 35e, the atomization air valve 35f, the signal tower 35g, the laser marker 35h, the virtual pilot lamp 35i on the touch panel, and the display unit 505.

[0040] The control device 15a is connected to the storage unit 15b. The storage unit 15b stores tire information that individually indicates a plurality of tire types having different outer diameters, section heights, and section widths, and push-in position information that indicates a predetermined first push-in position (hereinafter, may be abbreviated simply as "pushing position") of the guide press rollers 23a, 23b in association with the tire information, and push-in position information that indicates a predetermined second push-in position (hereinafter, may be abbreviated simply as "pushing position") of the bead roller 27a or 28b. The changeover switches SW25 to 27 described below constitute an input device 500 that is operated to select one of the plurality of tire information.

[0041] The positions of the guide press rollers 23a and 23b in the direction of the axis L2 are detected by the guide press movement distance detection means 13e, and the positions of the bead rollers 27a and 27b in the direction of the axis L2 are detected by the moving table movement distance detection means 13d. These position detectors 13e and 13d are realized by linear encoders, and each detection value signal is input to the control unit 15 and used for calculation of the pressing position, etc.

[0042] The control device 15a reads out from the memory unit the pushing position information of the guide press rollers 23a, 23b and the pushing position information of the bead rollers 27a, 27b corresponding to one piece of tire information selected by the change-over switches SW25-27, and the control unit 15 moves the guide press rollers 23a, 23b of the tire pushing means 23 to a predetermined pushing position based on the pushing position information of the guide press rollers 23a, 23b read from the reading unit, and moves the bead rollers 27a, 27b to their pushing positions based on the pushing position information of the bead rollers 27a or 27b read from the reading unit.

[0043] When the control unit 15 is set to the light point alignment mode by the change-over switch C26, the chuck means E that grips the wheel 3 on which the tire 2 is mounted during the automatic tire mounting operation is rotated by the rotation drive unit 12, the ejection device 30 is extended, and the tire stand 5 is raised to a position where only the tire 2 stops relative to the wheel 3 that is rotating the ejection member 495 by manual operation of the operator's SW34.

[0044] When the light spot mark printed on the tire 2 and the valve position of the wheel 3 reach a position that coincides circumferentially, the worker can manually operate the SW34 to lower the tire stand 5, thereby achieving a state in which the lightest light spot position on the tire 2 and the heaviest valve position on the wheel are in the same position. By achieving this state in which the lightest light spot position on the tire 2 and the heaviest valve position on the wheel are in the same position, it is possible to reduce the amount of weight imbalance when the tire rolls. When the worker presses the SW22, the control unit 15 determines that the light spot alignment mode has been completed, stops the rotation drive unit 12, and returns to automatic tire mounting operation.

[0045] The control unit 15 is realized by a CPU as a hardware resource, and is configured to perform the following calculations using a program, which is a software resource, executed by the CPU, to calculate the amount of lift required to align the central axis of the tire 2 with the axis L2 of the rotation drive unit 12.

[0046] That is, when the distance from axis L1, which is the center of rotation of tilting arm 10, to contact point 7a near top 6 of tire 2 is L11, the outer diameter of tire 2 is D, the moving distance from the support surface of tire stand 5 to axis L1 of tilting arm 10 in the vertical direction is H1, the moving distance from the tire support surface of tire stand 5 to axis L2 of rotation drive unit 12 is H3, and the moving distance to be raised is H2, then Tire outer diameter D = L11 × sinθ + H1 … (1) Travel distance H2=H3-D / 2…(2) It can be calculated by:

[0047] By outputting a drive signal corresponding to such a travel distance H2 to the lifting cylinder CY6, the tire stand 5 is raised by the lifting means 16 by the travel distance H2, and the tire 2 can be raised to a height position where the central axis of the tire 2 coincides with the axis L2 of the rotation drive unit 12.

[0048] After the worker loads the tire 2 onto the tire stand 5 in the lowered position by, for example, rolling it, the tilting arm 10 is brought into contact with the vicinity of the top 6 of the tire 2, so that the tire 2 can be automatically moved to a height position where the central axis of the tire 2 coincides with the axis L2 of the rotation drive unit 12, thereby making it possible to perform the operations of mounting the tire 2 on the wheel 3 and removing the tire 2 from the wheel 3 in a short time, significantly reducing the labor and time required by the worker.

[0049] 17 is a hydraulic circuit diagram of the tire mounting / removal device 1. The tire mounting / removal device 1 includes a chuck opening / closing cylinder CY1, a chuck table front / rear cylinder CY2, a right roller telescopic cylinder CY3, a left roller telescopic cylinder CY4, a forward / reverse dispensing cylinder CY5, a lift up / down cylinder CY6, a moving table front / rear cylinder CY7, a first flow path switching valve V1, a second flow path switching valve V2, a third flow path switching valve V3, a fourth flow path switching valve V4, a fifth flow path switching valve V5, a sixth flow path switching valve V6, a seventh flow path switching valve V7, a relief valve V8, a tank T, a pump P, a hydraulic motor PM, and a plurality of check valves V10.

[0050] The above-mentioned chuck opening / closing cylinder CY1, chuck table front / rear cylinder CY2, right roller telescopic cylinder CY3, left roller telescopic cylinder CY4, forward / reverse discharge cylinder CY5, lift up / down cylinder CY6, and moving table front / rear cylinder CY7 are made of double-acting hydraulic cylinders. Also, the above-mentioned first flow path switching valve V1, second flow path switching valve V2, third flow path switching valve V3, fourth flow path switching valve V4, fifth flow path switching valve V5, sixth flow path switching valve V6, and seventh flow path switching valve V7 are made of 4-port 3-position solenoid valves. Hydraulic oil is stored in tank T, and one end of each of supply pipe 51, return pipe 52, and return pipe 53 is immersed in it.

[0051] A pump P is interposed in the supply pipe 51, and a pressure gauge Pm is connected to the supply pipe 51. The pressure of the hydraulic oil in the supply pipe 51 is measured by the pressure gauge Pm. The pressure of the hydraulic oil in the supply pipe 51 is set to, for example, 16 MPa. Branch pipes 51a to 51p are connected to the supply pipe 51. A motor PM is connected to the pump P. The branch pipes 51a, 51d, 51f, 51h, 51j, 51m, and 51o are connected to the inlet neutral ports of the first flow path switching valve V1, the second flow path switching valve V2, the third flow path switching valve V3, the fourth flow path switching valve V4, the fifth flow path switching valve V5, the sixth flow path switching valve V6, and the seventh flow path switching valve V7. One end of each of the branch pipes 51b, 51e, 51g, 51i, 51k, 51n, and 51p is connected to the neutral port on the outlet side of the first flow path switching valve V1, the second flow path switching valve V2, the third flow path switching valve V3, the fourth flow path switching valve V4, the fifth flow path switching valve V5, the sixth flow path switching valve V6, and the seventh flow path switching valve V7. The other end of each of the branch pipes 51b, 51e, 51g, 51i, 51k, 51n, and 51p is connected to one port of each of the cylinders CY1 to CY7. The other end of each of the branch pipes 51b, 51e, 51g, 51i, 51k, 51n, and 51p is connected to the other port of each of the cylinders CY1 to CY7. A check valve V10 is provided in each of the branch pipes 51b, 51e, 51g, 51i, 51k, 51n, and 51p and each of the branch pipes 54b, 54d, 54f, 54h, 54i, 54k, and 54n. The other ends of the supply pipe 51 and the return pipe 52, opposite to the ends immersed in the tank T, are closed.

[0052] A return pipe 53 is connected between the pump P of the supply pipe 51 and the pressure gauge Pm. A relief valve V8 is provided in the return pipe 53. A pressure reducing valve V9 is provided in the branch pipe 51c. This branch pipe 51c is connected to a second supply pipe 55. A branch pipe 56 is connected to the return pipe 52. The pressure reducing valve V9 is used so that the pressure of the hydraulic oil in the supply pipe 55 is maintained at, for example, 9 MPa.

[0053] 18 is an exploded perspective view showing the configuration of the main body frame section A. The main body frame section A includes a main body base 101 having a substantially rectangular shape in a plan view, a support body 22 mounted on one end side of the main body base 101 in the longitudinal direction, a movable table front-rear cylinder CY7 installed near one long side of the main body base 101, and a Cableveyor (registered trademark) 129 screwed to the main body base 101. The support body 22 includes a cover frame 138, a left side cover 146 screwed to the cover frame 138, a right side cover 147 screwed to the cover frame 138, a front cover 137 screwed to the cover frame 138, and a top plate cover 139 screwed to the cover frame 138.

[0054] 19 is an exploded perspective view showing the configuration of the lift drive unit B. The lift drive unit B includes a flat lift base 202, a lift frame 209 on which tires are placed, four pneumatic cylinders CY10, CY11, CY12, and CY13 mounted on the lift base 202, a guide member 208 erected on the lift base 202, a guide shaft 207 inserted into the guide member 208, a pair of side covers 203 and 204, a pair of frame covers 205 and 206, a foot switch mount 210, the above-mentioned foot switches Pd1 to Pd3 mounted on the foot switch mount 210, and a foot switch cover 211 covering each of the foot switches Pd1 to Pd3 on the foot switch mount 210.

[0055] 20 is an exploded perspective view showing the configuration of the light curtain unit C. The light curtain unit C, which is an intrusion detection means, includes two pipe frames 301, 315, a pair of pipe frame mounting bases 308, 312, a cover member 321 fixed to one pipe frame 301, a cover member 322 fixed to the other pipe frame, a rod-shaped light-emitting unit 318a attached to one pipe frame 301 together with the cover member 321, and a rod-shaped light-receiving unit 318b attached to the other pipe frame 301 together with the cover member 321. The light-emitting unit 318a may be configured such that a plurality of light-emitting elements, such as laser diodes, are aligned in a straight line and mounted on a substrate. The light-receiving unit 318b may be realized by a plurality of phototransistors, for example. The light curtain unit C is provided so as to define a detection area facing the lifting / lowering means and the gripping unit from one side. When an object, such as a worker, enters the detection area, a detection signal is output to the control unit 15. The control unit 15 that receives the detection signal stops at least the rotational operation of the rotation drive unit and the lifting / lowering operation of the tire table 5. At this time, the tire 2 gripped by the gripping unit continues to rotate or lift for a while due to inertia, but if it is rotating, for example, the tire 2 will decelerate and stop rotating completely after 2 to 3 seconds, improving safety.

[0056] 21 is an exploded perspective view showing the configuration of the arm unit D. The arm unit D includes a chuck slide base 201, a movable body 26 guided along the chuck slide base 201, a chuck rotating motor M1 mounted on the movable body 26, a motor installation stand 222, a chain cover 240 attached to the movable body 26, a lid body 241 attached to the chain cover 240, a sprocket 230 fixed to the rotating shaft of the chuck rotating motor M1, a chain 232 wound around the sprocket 230, and the above-mentioned chuck table front-rear cylinder CY2.

[0057] FIG. 22 is an exploded perspective view showing the structure of the chuck means E. As shown in FIG. The chuck means E includes a piston shaft 319, a piston 342 fixed to the piston shaft 319, a cylinder tube 317 into which the piston shaft 319 and the piston 342 are inserted, a chuck flange 332 fixed coaxially to the cylinder tube 317, a disk-shaped roller guide 307 attached to the chuck flange 332, a roller 336, a cross-shaped roller support member 328 fixed by a nut 338 to the portion inserted into the roller guide 307 and the roller 336, a plurality of connecting members 302, 303 connected to the chuck flange 332 by bolts 305 so as to be angularly displaceable, a plurality of link members 325 connected to each of the connecting members 302, 303 so as to be angularly displaceable, a plurality of claw members 311 connected to each of the link members 325 and each of the connecting members 302, 303, a divider 327 fixed to the cylinder tube 317, and a sprocket 335 fixed coaxially to the divider 327. The cylinder tube 317, the piston shaft 319, the piston 33, the chuck flange 332 and the divider 327 constitute the cylinder CY12.

[0058] 23 is an exploded perspective view showing the configuration of the tool unit F. The tool unit F includes the tire stand 5, a tire lifter 471 on which the tire stand 5 is placed and which is substantially L-shaped in side view, a tool moving base 401, a pair of bead rollers 27a, 27b supported by the tool moving base 401, the roller telescopic cylinders CY3, CY4 that extend / retract the bead rollers 27a, 27b in the axial direction, the lift up / down cylinder CY6, the delivery telescopic cylinder CY15, and a delivery member 495 that is driven by the delivery telescopic cylinder CY15 and presses the tire 2.

[0059] 24 is an exploded perspective view showing the configuration of the tilting arm driver G. The tilting arm driver G includes the above-mentioned tilting arm 10, a tire support base 801 to which the base end 8 of the tilting arm 10 is pin-connected by support pins 812 and 814, a tilting cylinder CY16 that angularly displaces the tilting arm 10, a laser marker device 834 mounted on the tilting arm 10, a limit switch 804 attached to the tire support base 801, and a rotary encoder 815 connected to the pin 814.

[0060] The laser marker device 834 has a laser beam emitting unit 833 that emits a sector-shaped, planar green laser beam perpendicular to the axis L2, a laser stay 827 on which the laser beam emitting unit 833 is mounted, a laser stay 828 to which the laser stay 827 is fixed by a bolt, and a cover body 826 that covers the laser beam emitting unit 833. The laser marker device 834 adjusts the position of the tire 2 on the tire stand 5 so that the laser beam is positioned approximately in the center of the tire cross-sectional width of the tire 2 placed on the tire stand 5, thereby making it possible to suppress chucking errors by the gripper 18 when fixing the wheel.

[0061] 25 is an exploded perspective view showing the configuration of the guide press unit H. The guide press unit H includes a pair of guide press rollers 23a, 23b, brackets 534a, 534b that support the guide press rollers 23a, 23b so that they can rotate around their respective axes, a guide press plate 531 to which the brackets 534a, 534b are fixed, a pair of linear guide bodies 502a, 502b having guide shafts 514a, 514b to which the guide press plate 531 is fixed, a plate-shaped guide press frame 501 to which the linear guide bodies 502a, 502b are fixed in parallel, and a guide press cylinder CY17 that is mounted on the guide press frame 501 and extends / retracts the guide press rollers 23a, 23b and the guide press plate 531. The guide press cylinder CY17 is a double-acting pneumatic cylinder and includes a piston rod 526, a cylinder case 518, a rod flange 521, and a head flange 515. The axis of the piston rod 526 is parallel to the axes of the guide shafts 514a, 514b.

[0062] 26 is an exploded perspective view showing the configuration of the bead press unit I. The bead press unit I includes a bead press member 624, a bead press arm 648 to the tip of which the bead press member 624 is fixed, an arm receiving member 601 that supports the base end of the bead press arm 648 rotatably about its axis, a pair of guide shafts 604a, 604b to the tip of which the arm receiving member 601 is fixed, the forward / reverse dispensing cylinder CY5 having a piston rod 632, a rod-shaped rack 644 that is coaxially fixed to the piston rod 632 of the forward / reverse dispensing cylinder CY5, and a pinion 620 that is fixed to the base end of the bead press arm 648 and with which the rack 644 meshes.

[0063] Fig. 27 is a side view showing the configuration of the connecting cylinder part J, Fig. 28 is a front view of the connecting cylinder part J as seen from the right of Fig. 27, and Fig. 29 is an exploded perspective view showing the configuration of the connecting cylinder part J. The connecting cylinder part J is provided in the support body 22 and installed on the base 21. The connecting cylinder section J comprises a connecting frame body 701 fixed to the base 21, a box-shaped connecting base body 736 fixed to the upper part of the connecting frame body 701, a pair of shaft guide members 737a, 737b fixed respectively to both sides of the connecting base body 736, a guide press cylinder CY17 fixed to the upper part of the connecting base body 736, a connecting cylinder CY18 fixed to the upper part of the connecting frame body 701, a shaft guide member 749 fixed to a part of the upper part of the connecting base body 736 near one side, an inch switching cylinder CY12 fixed parallel to the shaft guide member 749 to a part of the upper part of the connecting base body 736 near one side, an inch switching solenoid valve V703, a bead press solenoid valve V702, and a guide press solenoid valve V701 attached to one side of the connecting base body 736, and a tire lift solenoid valve V705 and a connecting cylinder solenoid valve V704 attached to one leg of the connecting frame body 701.

[0064] FIG. 30 is an exploded perspective view showing the configuration of the control unit 15. The control device 15a is provided on the support 22. The control device 15a includes the above-mentioned control unit 15 and an input device 500. The control unit 15 has a housing 514s installed behind the input device 500. The housing 514s contains leakage breakers 517, 518s, electromagnetic switches 519, 520, a relay 522, a noise filter 524, a sequencer power supply unit 526s, sequencer devices 527, 528, a memory card 529, a sequencer counter 530, sequencer input units 531s, 532, a sequencer output unit 533, a terminal block 536, and the like. In addition, for the input device 500, the same reference numerals are used for parts corresponding to those in FIG. 5, and descriptions thereof will be omitted to avoid duplication.

[0065] FIG. 31 is an exploded perspective view showing the configuration of the bead cream spouting portion M. As shown in FIG. The bead cream spraying section M is provided on one side facing the gripping section 18 of the support body 22 and includes a container 633 in which liquid bead lubricant called bead cream is stored, a bead lubricant detector 636 inserted near the bottom of the container 633 and detecting the presence or absence of bead lubricant in the container 633, a liquid level gauge 635 provided on the side of the container 633 and detecting the liquid level of the bead lubricant in the container 633, a tire support solenoid valve V601 provided on one side of the tire lifter 471 on the gripping section 18 side, a dispensing solenoid valve V602 provided adjacent to the tire support solenoid valve V601 on one side of the tire lifter 471 on the gripping section 18 side, a silencer 613, an operating solenoid valve V603, an atomization solenoid valve V604, three regulators 629, and a nozzle member 646 that atomizes or sprays the bead lubricant in a line. The silencer 613 has a case 617, a filter material 618 such as glass wool housed in the case 617, and a cover 621 that airtightly closes the opening of the case 617. The silencer 613 is provided to reduce the exhaust noise of the exhaust air discharged when the air cylinder is driven.

[0066] Fig. 32A is a diagram showing a state before the tire 2 is dispensed by the dispensing device 30, and Fig. 32B is a diagram showing a state in which the tire 2 has been dispensed by the dispensing device 30. Fig. 33 is a diagram showing a state in which the tire 2 is prevented from rotating by the dispensing device 30. Since the dispensing device 30 is provided on the tire lifter 471, when the tire 2 is placed on the tire stand 5 and the gripper 18 is removed from the wheel 3 as shown in Fig. 32A, when an operator steps on the foot switch Pd3, a dispensing member 495 protrudes as shown in Fig. 32B, and the tire 2 is pressed against the tire stand 5 to be dispensed. In addition, when performing light spot alignment, the light spot position with the light spot mark on the tire 2 is positioned at, for example, the 6 o'clock position, and as shown in FIG. 33 , the tire 2 is pressed by the pushing member 495 to prevent the tire 2 from rotating, and the gripping portion 18 is rotated to rotate the wheel 3 until the valve position of the wheel 3 circumferentially coincides with the light spot position of the tire 2, thereby performing light spot alignment.

[0067] By providing the tire lifter 471 with the ejection device 30, the tire 2 can be easily ejected, and the burden on the worker can be reduced. In addition, the ejection device 30 allows the wheel 3 to be rotated by the gripper 18 alone while preventing the tire 2 from rotating, which facilitates the light point alignment work.

[0068] Fig. 34A is a diagram showing the state when the bead roller 27b starts dispensing the tire 2, and Fig. 34B is a diagram showing the state when the bead roller 27b has dispensing the tire 2 to the first dispensing position. With the second bead portion of the tire 2 supported by the other bead roller 27b, the guide press roller 23a extends from the origin position to the push-in position L11 read from the memory unit and pushes the first bead portion of the tire 2 toward the second bead portion, so that the first bead portion is pushed near the drop portion of the wheel 3, and the bead roller 27b further pushes the first bead portion to the first dispensing position of the distance L12, so that even if the tire 2 is a wide tire with high rigidity, the first bead portion can be reliably dispensed without being influenced by the shape of the shoulder portion.

[0069] FIG. 35A is a cross-sectional view showing the state in which the tire is pushed in by the hump-crossing operation of the tire mounting / removal device, and FIG. 35B is a side view seen from the left of FIG. 35A. With the wheel 3 on which the tire 2 is mounted being held by the gripping part 18, the control part 15 rotates the rotation drive part 12 and stops it at a position where one of the bead rollers 27a and the valve position overlap in the circumferential direction. The control part 15 moves the bead roller 27a to the hump-crossing push-in position to push in the first bead part, so that the second bead part on the opposite side can cross the valve position. The control part 15 also rotates the rotation drive part 12 for two cycles within a range of ±15° based on the position of the bead roller 27a, so that the second bead can more reliably cross the valve position. By aiming at the valve position to cross the hump, the operation time can be shortened compared to the conventional operation in which the entire second bead is made to cross the hump.

[0070] FIG. 36 is a flow chart for explaining the hump-crossing operation of the tire mounting / removal device 1. When the worker operates the change-over switch SW22 while the wheel 3 is being held by the gripping part 18 to start the tire mounting operation, in step s1, the control part 15 starts the rotation of the rotation drive part 12. Next, the process proceeds to step s2, and when the valve 17 of the wheel 3 is in the same angular position as one of the bead rollers 27a, the rotation of the tire 2 is stopped. In step s3, one of the bead rollers 27a is moved to a hump-crossing push-in position. In step s4, the rotation drive part 12 is rotated for two cycles within a range of ±15° based on the position of one of the bead rollers 27a. In step s5, one of the bead rollers 27a is moved to the initial position, and in step s6, the hump-crossing operation is terminated by detecting that one of the bead rollers 27a has reached the initial position.

[0071] 37 and 38 are flow charts for explaining the operation of the valve avoidance mode of the tire mounting / removal device 1. With the tire mounting / removal device 1 in the valve avoidance mode on state, an operator operates the change-over switch SW21 to select automatic operation, and in step a1, an operator places the tire 2 on the tire stand 5 and manually rotates the tire 2 on the tire stand 5 so that the valve 17 is at the 6 o'clock position. In step a2, an operator operates the change-over switch SW22 to start automatic operation. In step a3, the rotation drive unit 12 is rotated until the origin of the gripping unit 18 is obtained. In step a4, when the origin of the gripping unit 18 is obtained, the rotation drive unit 12 is stopped. In step a5, the tilting cylinder CY16 is extended, and the tilting arm 10 is set to the top 6 of the tire 2. In step a6, a signal from the angle measurement unit is read, and in step a7, the lift amount of the lifting cylinder CY6 is calculated. In step a8, the lift cylinder CY6 is raised by the previously calculated value, and in step a9, the movable body 26 is moved to a specified value. In step a10, the gripping portion 18 is opened to grip the wheel 3. In step a11, the tilting cylinder CY16 is retracted, and the tilting arm 10 is moved to the origin position. In step a12, the lift cylinder CY6 is lowered until the lower end sensor of the lift cylinder CY6 is detected. In step a13, it is determined whether the valve avoidance switch is on. If the valve avoidance switch is off, the process proceeds to step a14, and if the valve avoidance switch is on, the process proceeds to step a22.

[0072] In step a14, the rotary drive unit 12 is rotated counterclockwise. In step a15, the bead roller 27a is moved. In step a22, the rotary drive unit 12 keeps the tire 2 oscillating in a range of 100° downstream, and then the process proceeds to step a15. In step a16, the control unit 15 starts spraying bead cream, and in step a17, the control unit 15 sprays the bead cream for a specified time. In step a18, the control unit 15 reads the pushing position of the guide press rollers 23a, 23b. In step a19, it is determined whether the flat tire mode is on. If the flat tire mode is off, the process proceeds to step a20, and if the flat tire mode is on, the process proceeds to step a23. In step a20, the guide press rollers 23a, 23b are extended to the previous pushing position, and the first bead portion of the tire 2 is guided to the drop portion of the wheel 3. In step a23, the pushing positions for the guide press rollers 23a and 23b for a flat tire are read out, and then the process proceeds to step a20.

[0073] Next, in step a24, it is determined whether the low-profile tire mode is on or not. If the low-profile tire mode is on, the process proceeds to step a25. If the low-profile tire mode is off, the process proceeds to step a26. In step a25, the control unit 15 reads out the removal position of the first bead portion for low-profile tires. In step a26, one bead roller 27a starts moving to the previous pushing position, and pushes out the first bead portion from the wheel 3. In step a27, the guide press rollers 23a and 23b are moved to the origin position. In step a28, it is determined whether the valve avoidance switch SW is on or not. If the valve avoidance switch SW is off, the process proceeds to step a29. If the valve avoidance switch SW is on, the process proceeds to step a30. In step a29, the control unit 15 reads out the pushing position of the second bead portion of the other bead roller 27b from the memory unit 15b. Then, the process proceeds to step a34.

[0074] In step a30, the rotation of the rotary drive unit 12 is stopped, and in step a31, the lift cylinder CY6 is raised by the previously calculated value to receive the tire 2. In step a32, the removal preparation position of the second bead portion of the other bead roller 27b is read out. In step a33, the lift cylinder CY6 is lowered until the lower end sensor of the lift cylinder CY6 is detected, and then the process proceeds to step a29.

[0075] In step a34, it is determined whether the flat tire mode is on or not. If the flat tire mode is off, the process proceeds to step a35, and if the flat tire mode is on, the process proceeds to step a36. In step a36, the pushing position of the second bead portion for the flat tire is read by the control unit 15, and the process proceeds to step a35. In step a35, the other bead roller 27b starts moving to the pushing position of the second bead portion. In step a37, the lift cylinder CY6 is raised by the moving distance H2. In step a38, the lift cylinder CY6 is raised by the moving distance H2 and then put into standby. In step a39, the other bead roller 27b reaches the pushing position of the second bead portion. In step a40, it is determined whether the valve avoidance switch is on or not. If the valve avoidance switch is off, the process proceeds to step a41, and if the valve avoidance switch SW is on, the process proceeds to step a42. In step a42, the rotation drive unit 12 is rotated counterclockwise. In step a41, the lifting frame is raised a specified number of seconds after the second bead portion is pushed in, and the tire 2 is received. In step a43, the rotation of the rotation drive unit 12 is stopped. In step a44, the lifting cylinder CY6 is lowered until the lower end sensor of the lifting cylinder CY6 is detected. In step a45, the moving body 26 is moved to the origin position. When the moving body 26 reaches the origin position in step a46, automatic operation is terminated. In step a47, when the worker presses the discharge switch, the tire 2 is pushed out onto the discharge plate. In step a48, the worker ejects the tire 2 from the tire mounting / removal device 1, and the operation is terminated.

[0076] FIG. 39 is a flow chart for explaining the light point alignment operation of the tire mounting / removal device 1. When the control unit 15 is set to the light point alignment mode by the changeover switch C26 and the automatic tire mounting operation is started, the control unit 15 starts the light point alignment operation during the automatic tire mounting operation. In step b1, the control unit 15 controls the rotation drive unit 12 to start rotating while the wheel 3 with the tire 2 fitted therein is held by the gripper unit 18. In step b2, the control unit 15 holds a flag so that the lifting / lowering means 16 can be manually raised and lowered. In step b3, the control unit 15 controls the extension / retraction cylinder CY15 to extend and raise the releasing member 495 and maintain it. In step b4, the operator operates the changeover switch SW34 to raise the tire stand 5 and press the releasing member 495 against the tire bottom. In step b5, the releasing member 495 is pressed against the tire 2, the rotation of the tire 2 is suppressed and stopped, and only the wheel 3 is in an idle state. In step b6, when the worker visually confirms that the light point mark of the tire 2 is aligned with the position of the valve 17, the worker operates the change-over switch SW34 to lower the tire stand 5, releasing the restriction on the rotation of the tire 2 and preventing the wheel 3 from spinning freely. In step b7, when the worker presses the start switch SW7, the control unit 15 releases the manual flag of the rotation drive unit 12. In step b8, under the control of the control unit 15, the delivery telescopic cylinder CY15 is lowered until it is detected by the lower end sensor of the delivery telescopic cylinder CY15. In step b9, under the control of the control unit 15, the rotation of the rotation drive unit 12 is stopped and the light point alignment mode is completed.

[0077] FIG. 40 is a cross-sectional view showing an example of the installation of the tire internal pressure measuring device 19, FIG. 41A is a diagram for explaining the operation of the tire mounting / removal device 1 in the valve avoidance mode, and FIG. 41B is a diagram for explaining the operation of the tire mounting / removal device 1 in the valve avoidance mode. FIG. 40(1) is a cross-sectional view showing a tire 2 without the tire internal pressure measuring device 19 attached, FIG. 40(2) is a cross-sectional view showing the state in which the tire internal pressure measuring device 19 is attached to the valve 17, FIG. 40(3) is a cross-sectional view showing the state in which the tire internal pressure measuring device 19 is attached to the wheel 3 by a belt, FIG. 40(4) is a cross-sectional view showing the state in which the tire internal pressure measuring device 19 is attached to the wheel 3 by a wire, and FIG. 40(5) is a cross-sectional view showing the state in which the tire internal pressure measuring device 19 is attached to the tire 2 by a wire. In some cases, a tire internal pressure measuring device (abbreviated as TPMS) 19 is attached to the wheel 3 of the tire 2 in order to monitor the tire internal pressure. There are three ways to attach the tire pressure gauge 19: attaching it to the valve, wrapping it around the wheel 3 with a belt, and wrapping it around the wheel 3 with a wire. When removing and mounting a tire with the tire pressure gauge 19 attached, care must be taken to prevent interference between the bead portion and the tire pressure gauge 19, otherwise the tire pressure gauge 19 may be damaged. Damage to the tire pressure gauge 19 occurs when the tire pressure gauge 19 is located on the opposite side of the bead roller 27a, as shown in Figure 41A.

[0078] FIG. 42A is a cross-sectional view showing an example of damage to the tire internal pressure gauge 19 when the tire is removed, and FIG. 42B is a cross-sectional view showing an example of damage to the tire internal pressure gauge 19 when the tire is attached. As shown in FIG. 42A, when the tire is removed, when the first bead portion is removed, the tire 2 tries to descend by its own weight, so that the second bead portion comes into contact with the top surface of the wheel 3. If the second bead portion is pushed out by the bead roller 27b while being in contact with the top surface of the wheel 3, the second bead portion gets caught by the tire internal pressure gauge 19, damaging the tire internal pressure gauge 19. Also, as shown in FIG. 42B, when the tire is attached, when the first bead portion is fitted to the wheel 3, the tire 2 tries to descend by its own weight, so that the first bead portion comes into contact with the top surface of the wheel 3. When the second bead portion is pressed in by the other bead roller 27b, the first bead portion gets caught on the tire internal pressure gauge 19, causing the tire internal pressure gauge 19 to be damaged.

[0079] In order to avoid such damage to the tire internal pressure gauge 19, when mounting or removing the tire 2 on or from the wheel 3, the valve 17 and the tire internal pressure gauge 19 can be positioned downward to avoid interference between each bead portion and the tire internal pressure gauge 19, and when the bead passes over the tire internal pressure gauge 19, interference between the bead and the tire internal pressure gauge 19 can be avoided by lifting the tire 2 while moving it.In order to reflect these elements, the tire mounting / removal device 1 of the present invention has a valve avoidance mode.

[0080] Fig. 43 is a diagram for explaining the operation of the valve avoidance mode of the tire mounting / removal device 1. The relationship between the configuration of the valve avoidance mode and when a tire is inserted will be described. A proximity sensor and a contact piece of the proximity sensor are provided to set the rotation origin of the gripper 18. Also, a rotary encoder is provided on the output shaft end of the motor M1 that rotates the gripper 18, and the number of measured pulses is calculated to detect how many degrees the gripper has tilted from the origin.

[0081] FIG. 44 is a diagram for explaining the operation of the valve avoidance mode of the tire mounting / removal device 1. In addition, when inserting the tire into the tire stand 5, the valve 17 needs to be aligned at the 6 o'clock position (directly below) so that the origin of rotation obtained by the gripping part 18 and the angular position of the valve 17 are always the same. Two rotatable rollers are provided on the tire stand 5, and the worker rotates the tire 2 by hand and corrects the position below the 6 o'clock position where it is visible, thereby completing the insertion work. The tire internal pressure gauge 19 is disposed inside the tire, and therefore cannot be visually confirmed, so it is preferable to position the tire internal pressure gauge 19 near the valve 17 when mounting the tire pressure gauge 19 on the wheel 3.

[0082] FIG. 45A is a cross-sectional view for explaining the operation of the tire mounting / removal device 1 in the valve avoidance mode, and FIG. 45B is a side view for explaining the operation of the tire mounting / removal device 1 in the valve avoidance mode. The valve avoidance mode will be explained. By aligning the origin of the gripping part 18 and the 6 o'clock position of the valve 17 of the wheel 3 to the same position, the position of the valve sensor can be specified during automatic mode operation of the tire mounting / removal device 1. This allows the position of the valve 17 to be moved arbitrarily below the wheel 3 to prevent damage to the tire internal pressure gauge 19 during tire replacement, and prevents damage to the tire internal pressure gauge 19. In addition, since the rotation angle of the gripping part 18 is also recognized by the rotary encoder, during tire replacement work, the gripping part 18, which has been set to continue rotating in a fixed direction (forward or reverse), can be controlled by the control part 15 to rotate within a range of angle θ of approximately 100°, so that the valve sensor can always move below the wheel 3.

[0083] FIG. 46A is a cross-sectional view for explaining the operation of the tire mounting / removal device 1 to go over a hump, and FIG. 46B is a side view for explaining the operation of the tire mounting / removal device 1 to go over a hump. In the conventional technology, in the operation of going over a hump by the tire mounting / removal device 1, the guide press roller and the bead roller simultaneously press the opposing parts of the tire to make the entire bead go over the hump. This is because the positional relationship of the valve 17 could not be determined. In contrast, in the present invention, the positional relationship of the valve 17 can be recognized by the valve avoidance mode, so that if the valve 17 is passed, the air does not leak directly out of the wheel when the tire is filled with air thereafter, but remains inside the tire 2, causing the tire 2 to inflate, and the tire 2 can go over the hump automatically due to the internal pressure. Since the tire can go over the hump with just a pinpoint push, it is no longer necessary to maintain the pushed-in state for, for example, 15 seconds at the push-in position, and the work time for the hump-crossing work can be shortened. In addition, even if a tire pressure gauge 19 is installed, the place where the vehicle goes over the hump is the bead roller position below the wheel 3, so the weight of the tire 2 creates a space, allowing the vehicle to go over the hump without interfering with the tire pressure gauge 19.

[0084] Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-mentioned embodiments, and various modifications and improvements are possible within the scope of the gist of the present invention. It goes without saying that all or part of the components of each of the above-mentioned embodiments can be appropriately combined within the scope of not contradicting each other. [Explanation of symbols]

[0085] 1 Tire mounting and dismounting device 2 Tires 3 Wheels 5 Tire stand 6 top 7 Free end 8 Proximal end 9 pillars 10 Tilting Arm 11 Height position determination means 12 Rotation drive unit 13 Tilt angle detection means 14 Height and distance detection means 13b Rotation angle detection means 13c Lift height distance detection means 13d Moving table movement distance detection means 13e Guide press travel distance detection means 13f Bead press travel distance detection means 13g Tire support origin limit switch 13h Movement table origin limit switch 13i Tire / Wheel Detection Limit Switch 13j Proximity switch 13k Safety Curtain 13m Hydraulic sensor for detecting chuck abnormalities 13n Cream shortage detection sensor 13o Physical switch on the operation panel 13p Virtual switch on touch panel 15 Control section 15a Control device 15b Storage section 16 Lifting means 20 beds 21 Foundation 22 Support 23a, 23b Guide press roller 23 Tire pushing means 24a Pressing member 24 Tire pressing means 25a, 25b Guide rail 26 Mobile 27a, 27b Bead roller 28 Hydraulic Pressure Generator 30 Dispensing device 35a hydraulic unit motor 35b Tire rotation motor 35d Each air cylinder 35e Cream application valve 35f Atomizing air valve 35g Signal Tower 35h Laser Marker 35i Virtual pilot lamp on touch panel 35j Touch Panel Screen 51 supply pipe 51a~51p Branch pipe 52 Return pipe 53 Return pipe 101 Body base 200 Foot switch section 471 Tire Lifter 495 Discharge material 500 Input Device 505 Display section A Main frame E Grip part H1 distance H2 Travel distance L1 axis L2 axis L11 distance CY1 Chuck opening and closing cylinder CY2 Chuck table front and rear cylinder CY3 Right Roller Telescopic Cylinder CY4 Left roller telescopic cylinder CY5 Reverse dispensing cylinder CY6 Lift up / down cylinder CY7 Moving table front and rear cylinder E Chuck Means M,M1 Hydraulic motor P-Pump Pd1, Pd2, Pd3 foot switches PM hydraulic motor Pm pressure gauge SW21~SW40 Changeover switch T Tank V10 check valve θ Tilt angle

Claims

1. a chuck means having a gripping portion for detachably gripping a wheel on which a tire having a section width exceeding 315 mm can be mounted, and a rotation drive portion for rotating the gripping portion about a horizontal axis of rotation; a lifting means for lifting and lowering the tire stand with the tire mounted thereon; a guide press roller capable of pressing the first bead portion of the tire toward the second bead portion; a pair of bead rollers, one of which can press either the first bead portion or the second bead portion; a storage unit that stores tire information that individually represents a plurality of types of tires having at least different tire diameters and tire section widths, wheel information that individually represents a plurality of types of wheels having at least different rim section widths and rim diameters, first pushing position information that individually represents a first pushing position of the guide press roller corresponding to the plurality of types of tires, and second pushing position information that individually represents a second pushing position of the pair of bead rollers corresponding to the plurality of types of tires, associated with the tire information; a first input unit for selecting one of a mounting mode for mounting the tire on the wheel and a removal mode for removing the tire from the wheel; A second input section for selecting a rim diameter and a rim section width of the wheel; a third input unit for selecting one of the valve avoidance mode and the light point alignment mode; a rotation amount detection unit provided in the rotation drive unit and detecting an amount of rotation of the grip unit about the rotation axis; a control unit that reads out the tire information, first pushing position information, and second pushing position information stored in the memory unit in response to information selected by the first input unit, the second input unit, and the third input unit, and operates the chuck means, the lifting means, the guide press roller, and the bead roller.

2. an intrusion detection means that is provided to define a detection area facing the lifting means and the gripping portion from one side, and that outputs a detection signal when an object intrudes into the detection area; 2. The tire mounting / removing device according to claim 1, wherein the control unit is configured to stop at least the rotational operation of the rotation drive unit and the lifting and lowering operation of the tire table in response to a detection signal from the intrusion detection means.

3. Further including a display unit capable of displaying image information, 3. The tire mounting / removing device according to claim 1, wherein the control unit causes the display unit to display image information indicating the content of the work to be performed in response to information selected by the first input unit, the second input unit, and the third input unit.

4. 3. The tire mounting / removal device according to claim 1, further comprising a plate-shaped tire guide member disposed on the tire stand, inclined downward from an intersection between the upper surface and one side surface of the tire stand located at a lower limit as it moves away from the intersection, and having a tip portion supported on a floor surface.

5. 3. The tire mounting and dismounting device according to claim 1, wherein the control unit moves the pair of bead rollers in an axial direction of the bead rollers in response to the rim diameter and rim cross-sectional width selected by the second input unit.

6. 3. The tire mounting / removal device according to claim 1, further comprising a pushing device disposed on the lifting means and configured to push the tire placed on the tire stand in a direction in which the tire rotates and moves outward from the tire stand.

Images