JPH0335124B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tire changing device for removing a tire from a wheel or assembling a tire to a wheel.

[Conventional technology and its problems]

In conventional devices of this kind, a lift device is required to raise and lower the wheels in order to place the wheels on the mounting base in a horizontal state and to fix the wheels on the mounting base. As a result, the entire device becomes large-scale, and the installation space becomes too large, resulting in problems such as poor workability.

An object of the present invention is to provide a tire changing device that solves the above problems.

[Means for solving problems]

The present invention includes a mount body that is capable of swinging in a vertical plane via a pivot shaft, and a wheel mount plate that is attached to the upper end surface of the mount body and rotates around its axis. A wheel mounting base; having a rotating shaft, a worm gear provided on the rotating shaft, and a wheel gear attached to the pivot shaft and meshing with the worm gear, and the rotation of the rotating shaft causes the worm gear and the wheel gear to be connected to each other. an undulating drive means for rotating the pivot shaft through the wheel mount and displacing the mount body of the wheel mount from a vertical state in which a tire can be attached or removed to a horizontal state in which a wheel can be attached or detached; It has a horizontal shaft that can swing in a horizontal plane and reciprocate in the horizontal direction, an arm that holds the horizontal shaft, and a swing mechanism that rotates the screw shaft and swings the arm. When the mounting body is in a vertical state, the horizontal shaft moves up and down due to the swinging of the arm by the swinging mechanism, and the roller presses the bead of the tire of the wheel mounted on the wheel mounting board. and a pressing means for doing so.

[Effect]

To attach a wheel to this device, first set the mount body of the wheel mount in a horizontal position, and then place it in an upright position (the state in which the wheel axis is horizontal).
approach the mounting base from the outside, and attach the wheel of this wheel to the wheel mounting board of the mounting base,
After that, the mount body may be made vertical. Conversely, when removing the mounted wheel, the wheel may be removed from the mounting board after the vertical mounting base body is brought into a horizontal state.

Also, when removing a tire from a wheel, or conversely, when attaching a tire to a wheel,
The horizontal shaft with rollers is capable of reciprocating in the horizontal direction, so it can be made to accommodate various sizes, and the horizontal shaft can swing in the horizontal plane, so it can be moved upwards. When switching from the bead pressed state to the lower bead pressed state,
Conversely, the rollers do not interfere with the wheels even when switching from the lower bead pressing state to the upper bead pressing state.

〔Example〕

Embodiments of the present invention will be explained in detail based on the drawings.

In FIGS. 1 to 3, 2 is a wheel mounting base, and a recess 3 formed in a predetermined part of the base 1.
It is arranged inside or above it. 4 is a undulating drive means for undulating the wheel mounting base 2;
In the illustrated embodiment, a rotating shaft 6 is rotated by a manual operation handle 5, and a wheel gear 8 is rotated via a worm gear 7 provided on the rotating shaft 6. The wheel mounting base 2 is provided with a mechanism for raising and lowering the wheel mounting base 2.

Reference numeral 9 denotes tire pressing means, which includes a horizontal shaft 10 having rollers 11 and capable of swinging in a horizontal plane and reciprocating motion in the horizontal direction; Arm 12
and a swing mechanism 45 that rotates the screw shaft 15 to swing the arm 12, and as the arm 12 swings by the swing mechanism 45, the horizontal shaft 10 moves up and down. . That is, arm 1
2, its bent portion 13 is pivotally supported via a pivot shaft 14 to a column 46 erected on the base 1, and the lower end of its short side 12a is connected to a swing mechanism 45. Here, the swinging mechanism 45 includes the screw shaft 15 and a motor 20 that rotates the shaft 15 via a reduction gear 21 such as a worm gear.
and a nut member 18 screwed onto the shaft 15.
and a connecting member 17 that connects the nut member 18 and the lower end of the arm via the pivot pin 16. Note that the reduction gear 21 is swingably supported by a bracket 22 fixed to the base 1. Also, in this case, the horizontal axis 10 is the arm 1
A pair of upper and lower parts are provided at the tip of the long side part 12b of 2,
The roller 11 has a truncated conical shape.

Therefore, when the motor 20 is rotationally driven and the shaft 15 rotates around its axis, the nut member 1
8 reciprocates in the direction of the shaft axis as shown by the arrow, whereby the lower end of the short side 12a of the arm 12 reciprocates in the direction of the shaft axis, and the arm 12
swings around its bent portion 13, and the horizontal axis 10
As a result, the roller 11 moves up and down.

Further, the horizontal axis 10 is the long side portion 12b of the arm 12.
It is inserted into a mounting hole provided at the tip of the holder, and is attached to the tip using a fixing tool such as a bolt (not shown). Therefore, by adjusting the amount of insertion into the mounting hole, the radial distance d between the roller tip surface and the outer peripheral portion of the wheel can be adjusted as shown in FIG. Note that this attachment hole is provided in a pivot shaft 47 that is rotatably supported at the tip of the long side portion 12b of the arm 12, so that the horizontal shaft 10 swings within a horizontal plane.

As shown by the imaginary lines in FIG. 2, the wheel mounting base 2 has a wheel 23 with a predetermined outer diameter mounted horizontally, and the rollers 11, 11 have various outer diameters. They are arranged at positions where predetermined portions of the tire 24 can be pressed from above and below, respectively. Further, as shown in FIG. 3, the wheel mount 2 is rotatably supported by the undulation driving means 4 and the support bracket 25, which are provided on both sides thereof. Specifically, wheel mounting board 3
The mounting base main body 27 has a rotating shaft 26 fixed to the upper end thereof, and pivot shafts 28, 28 are provided on both sides of the mounting base main body 27.
8 is inserted into the case 29 of the elevating drive means 4 and is fixed to the worm gear 7. 30
is the key. To explain the rotation mechanism of the wheel mount 2, a sprocket 32 is attached to the lower end of the rotating shaft 26, and a chain is connected between the sprocket 35 on the output side of a reducer 34 attached to the mount drive motor 33. 36 etc. are interposed and rotationally driven. That is, the drive motor 3
3. The reducer 34 is fixed on the common base plate 38 together with the wheel mount 2, rotates around the pivot shafts 28, 28, and tilts together with the mount body 27.

Therefore, when the manual operation handle 5 is rotated to rotate the rotary shaft 6, the rotation causes the pivot shaft 28 to rotate via the worm gear 7 and wheel gear 8, and the mount body 27 is rotated as shown in FIG. It is displaced between a vertical state shown by a solid line and a horizontal state shown by a phantom line, with the vertical state being a tire-removable state and the horizontal state being a wheel-removable state.

In order to attach the wheel 23 to the wheel mount 2 for tire replacement, first rotate the manual operation handle 5 and move the mount body 27 by the undulating drive means 4, as shown in FIG. Pivot shaft 28, 2
Swing it around 8 times to make it horizontal. Next, the wheel 23, which has been placed upright in advance, is moved toward the substantially horizontal mounting base body 27 and inserted into the hole of the wheel 23 from the back side. Therefore, the wheel 37 of the wheel 23 is fixed to the wheel mounting board 31 using connectors 19 such as presser bolts. In the same manner as above, operate the undulating drive means 4 to move the wheel mounting base 2 to the wheel 2.
By rotating in the opposite direction with 3 and standing up,
The wheels 23 are mounted on a wheel mounting board 31 and held in a horizontal state.

To remove the tire 24, move the horizontal shafts 10, 10 in the axial direction as shown in FIG. is fixed to the arm 12 with bolts (not shown). Next, the motor 20 is started and the screw shaft 15 is rotated to bring the lower roller 11 attached to the arm 12 into contact with the bead portion on the surface side of the tire 24. Then, the wheel mounting board 31 is rotationally driven by the mounting board driving motor 33, and the roller 11 is lowered while being rotated.
The fitting portion on the front side is separated from the wheel 37. After this, the rollers 11, 11 are once swung approximately 90 degrees as shown by the arrow M in FIGS. 2 and 3, and the wheels 23
The arm 12 is rotated downward while avoiding interference with the wheel 23, and the rollers 11, 11 are positioned below the wheel 23. Then, return the rollers 11, 11 to their original positions as indicated by arrow N, raise them further, bring the upper roller 11 into contact with the bead on the back side of the tire 39, and raise the rollers 11, 11 while rotating the wheel 23 together with the mounting plate 31. By letting
First, the fitting part on the back side of the tire 24 is the wheel 37.
However, by further raising the tire 39, the entire tire 39 comes out upward and is separated from the wheel 37.

When removing a tire 24 whose outer diameter is larger than the standard one, as shown in FIG.
7 is inclined, and the wheels 23 are tilted,
You can do it in the same way as above.

To explain how to attach the tire 24 to the wheel 37, as shown in FIG.
As shown in the figure, the mounting plate 31 is locked at a predetermined portion, and in this state, the wheel mounting base 2 is brought into a vertical state. Then, as shown in FIG. 6, the wheel 37
By rotating the tire 24 latched to this and gradually lowering the lower roller 11 while applying an appropriate pressing force to the front side of the tire 24, the front side and the back side of the tire 24 are sequentially moved to the wheel 37. be fitted into. In the above-mentioned tire 24 replacement and assembly work, in order to prevent the tire 24 from rotating together or to press down a part of the tire 24, a presser lever of a predetermined shape can be used as an auxiliary tool. Work can be done more easily.

In the above embodiment, the undulation drive means 4 is operated manually, but it goes without saying that a motor drive system may also be used. It is also preferable to attach an oil or pneumatic cylinder to a predetermined portion of the base 1 so that the wheel mount 2 can be raised or lowered. Depending on the shape, size, and type of the wheel 23, the upper pair of rollers 11, 11 may be used to press the tire 24 downward, and the lower roller may be used to press the tire 24 upward. It is also preferable to use it as a method of use. Furthermore, it is also possible to provide only one roller 11 on the arm 12.

〔Effect of the invention〕

As described above, according to the present invention, there is no need for a lift mechanism for raising and lowering the wheels 23 as in the conventional case.
This has the effect that the entire device becomes compact and the installation space can be reduced.

In addition, in the conventional method, the wheel 23 must be tilted on a lift device and the lifting height must be adjusted before it can be placed horizontally on the upper side of the wheel mount, making the operation extremely complicated. However, in the present invention, when mounting the wheel 23 on this tire changing device, the mounting base body 2 of the wheel mounting base 2
7 is displaced horizontally, and in that state the wheel is mounted on the wheel mounting board 31. This eliminates the need to lift the wheel 23 using a lift device, etc., making the work easier. When removing the wheel 23 from the device, it can be easily done by keeping the mount main body 27 of the wheel mount 2 in a horizontal state, and work efficiency can be improved.

Even when raising the wheel 23 after changing the tire, it is extremely easy to do so by simply tilting the mounting base 2, and it is most suitable for a large diameter wheel 23 such as a truck.

Furthermore, in a device having a conventional lift mechanism, at the moment when the wheel 23 is placed on the wheel mount, or when raising the wheel 23 after the tire 24 has been assembled, the mount or a part of the lift device is removed. wheel 2
The wheels 37 of No. 3 may hit the wheels, and aluminum wheels in particular were often damaged. In the present invention, there is no possibility of such a problem occurring.

The present invention is superior in terms of safety, for example,
When the tire 24 comes off the wheel 37, in the case of the present invention, the mounting base 2 can be placed in a horizontal position, and the tire 24 can be lowered quietly. Although it was necessary to pull it down, which caused a safety problem, the present invention could solve this drawback.

[Brief explanation of drawings]

Figure 1 is a side view showing one embodiment of the present invention, Figure 2 is a side view showing one embodiment of the present invention;
The figure is the same plan view, Figure 3 is the front view, Figures 4 to 6
The figures are action explanatory diagrams. 2... Wheel mounting base, 4... Lifting drive means,
6... Rotating shaft, 7... Worm gear, 8... Wheel gear, 9... Pressing means, 10... Horizontal shaft, 1
1... Roller, 12... Arm, 15... Screw shaft, 23... Wheel, 24... Tire,
27...Mounting base body, 28...Pivot shaft, 31...
Wheel mounting board, 45...swing mechanism.

Claims (1)

[Scope of Claims] 1. A mount body 27 that is capable of swinging in a vertical plane via a pivot shaft 28, and a mount body 27 that is attached to the upper end surface of the mount body 27 and rotates around its axis. A wheel mounting base 2 having a wheel mounting plate 31, a rotating shaft 6, a worm gear 7 provided on the rotating shaft 6, and a wheel gear 8 mounted on the pivot shaft 28 and meshing with the worm gear 7. death,
The rotation of the rotating shaft 6 causes the pivot shaft 28 to rotate via the worm gear 7 and wheel gear 8, and the mount main body 27 of the wheel mount 2 is rotated.
A undulation driving means 4 for displacing the vehicle from a vertical state in which the tire can be attached or removed to a horizontal state in which the wheel can be attached or detached, and a horizontal shaft that has a roller 11 and is capable of swinging in a horizontal plane and reciprocating in the horizontal direction. 10
, an arm 12 that holds the horizontal shaft 10, and a swing mechanism 45 that rotates the screw shaft 15 to swing the arm 12. The horizontal shaft 10 moves up and down by the swing of the arm 12 by the mechanism 45, and the bead portion of the tire 24 of the wheel 23 mounted on the wheel mounting board 31 is moved by the roller 1.
A tire changing device comprising: a pressing means 9 pressed by the tire changing device 1;