JPH0237606Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to an improvement of a tire fitting device for fitting a tire onto a wheel.

``Prior Art'' Conventionally, there has been known a tire fitting device for fitting a tire B onto a wheel A as shown in FIG. 8, as shown in FIG. 9. This conventional example in Fig. 9 is
A lifting platform 6 on which a wheel A with a part of a tire B hooked thereon is arranged on the machine base 1a, and above the lifting platform 6, the hub hole surface A1 of the wheel A is received and the lifting platform 6 is placed. a lifting positioning body 10 that stops the lifting of the wheel A and clamps and fixes the wheel A between it and the lifting platform 6; It is made up of vertical rods 24, 24 that are fitted into each other.

The above-mentioned lifting positioning body 10 is normally fixed at a predetermined position above the lifting platform 6 so that it cannot be moved, and the lifting platform 6 rises until the hub hole surface A1 of the wheel A comes into contact with the lifting positioning unit 10. In this raised position, the vertical rods 24, 24 are connected to the rim A of the wheel A.
However, recently, various attempts have been made to make the fixed position of the rising positioning body 10 adjustable. This is because the wheels A are manufactured in various shapes, and the hub hole surface A1 and the rim A2 are not always located on the same plane as shown in FIG. There are some that are recessed inward, or conversely, that protrude, etc., and the lifting positioning body 1 fixes the hub hole surface A1 at a fixed position.
This is because there are many cases where the mutual positional relationship between the rim A and the vertical rods 24, 24 cannot be achieved properly even if the rim A is held at 0. It is intended to be able to be used as wheel A as well.

``Problems to be Solved by the Invention'' However, in this type of tire mounting device, if there is an error in the positional relationship between the rim A2 and the vertical rods 24, 24, the vertical rods 24, 24 will be attached to the inner peripheral surface of the tire B. When the vertical rod 24,
24 may come off, so the wheel A must be fixed in an accurate position, and the vertical rod 2
4 and 24, the force that opens the tire B exerts a force that pulls the wheel A in the horizontal direction, so it must be firmly fixed to sufficiently resist this force. Therefore, if the fixed position of the ascending positioning body 10 were to be adjustable, the device would require accuracy and great strength, making it larger and more complex, and the position adjustment operation of the ascending positioning body 10 would be difficult. It was known that it had the disadvantage of being complicated.

Therefore, the present invention has been made in view of the above, and the fixed position of the ascending positioning body 10 is set at the wheel A.
It is an object of the present invention to provide a tire mounting device which can be adjusted according to the shape of the vehicle, has a fixed position adjustment mechanism for the rising positioning body 10 with a simple structure, and can perform position adjustment operations easily and quickly. This is the purpose.

``Means for Solving the Problems'' In line with the above-mentioned purpose, the configuration of the present invention, which is summarized in the scope of the above-mentioned utility model registration claims, is to solve the above-mentioned problems by installing one tire B on the machine base 1a. A lifting platform 6 on which a wheel A with a hooked part is placed is arranged, and above the lifting platform 6, a hub hole surface A1 of this wheel A is received to stop the lifting platform 6 and also to lift the wheel A. a lifting positioning body 10 which is clamped and fixed between the lifting platform 6; and a rim A of the wheel A;
In the tire fitting device, the vertical rods 24, 24 rotate in opposite directions along the vertical axis 2 to fit the tire B onto the wheel A. A lifting stopper body 13 is disposed on the lower end of the rod 12 protruding from the lower end, and a collar body 17 is disposed on the rod 12 above the lifting stopper body 13,
A technical measure is taken in which a collar 18 having a substantially horseshoe-shaped plane and a desired thickness is removably mounted on the collar body 17.

``Function'' Therefore, in the present invention, a collar 18 with a set thickness is prepared for each wheel A having a different shape.
After lowering the rod 12 and replacing the collar 18 with one that is compatible with wheel A, the rod 1
2 is raised again, the collar 18 is moved to the collar body 17.
and the bottom surface of the vertical cylinder 11, and the fixing position of the lifting stopper body 13 can be adjusted.

``Example'' Next, an example of the present invention will be described below with reference to FIGS. 1 to 8.

In the figure, 1a is a machine base, and on this machine base 1a is a lifting platform 6 on which wheel A with a part of tire B hooked is placed.
are arranged. This lifting platform 6 is also similar to the machine platform 1.
The wheel A and tire B guided by the guide stand 5 placed on the machine stand 1a are placed thereon.
It is the same as in the past that it is raised and lowered by a cylinder (not shown) housed inside. Further, this lifting platform 6 is provided with a tire push-up body 7 that is urged upward by a spring 7a, and this push-up body 7 is located at one end of the tire B (on the front side in FIG.
The tire B is held in an inclined state by pushing up the left side of the figure, and the vertical rods 24, 24 are reliably caught on the inner peripheral edge of the tire B during reciprocating rotation.

This wheel A is placed above the elevator platform 6.
A lifting positioning body 10 that stops the lifting of the lifting platform 6 by receiving the hub hole surface A1 of the wheel A and clamps and fixes the wheel A between it and the lifting platform 6; Conventionally known vertical rods 24, 24 which rotate in the direction to fit the tire B onto the wheel A are arranged.

In the present invention, the rising positioning body 10 includes:
Rod 12 protruding from the lower end of vertical cylinder 11
An inverted conical lifting stopper body 13 is disposed at the lower end of the lifter. This vertical cylinder 11 is attached to the top end of a fixed shaft 1d (see FIG. 2) suspended from an upper frame 1c connected above the machine base 1a via a vertical frame 1b. The rod 12 of the stored piston 14 is made to protrude from the lower end of the vertical cylinder 11, and a pressure fluid unit (not shown) supplies pressurized fluid from the ports 15 and 16 to the vertical cylinder 11.
By supplying and discharging the rod 12, an elevating stopper body 13, which is screwed and fixed to the tip screw 12a of the rod 12, is raised and lowered. Note that, unlike the illustrated example, the vertical cylinder 11 may of course be fixed to the vertical frame 1b. Further, in the illustrated example, the lift stopper body 13 has an inverted conical shape so that its tip fits into the hub hole A3 of the wheel A so that it can receive sufficient horizontal stress, but only the clamping pressure is applied. If the wheel A can be securely fixed, a flat plate that contacts only the hub hole surface A1 may be used. Furthermore, in this embodiment, pressurized air is used as the pressure fluid, but this is because factories using this type of tire mounting device require a pressurized air supply source such as a large compressor. Since the existing equipment is used, the need to incorporate a new pressure fluid unit such as a hydraulic unit is omitted.

A collar body 17 is disposed above the lifting stopper body 13 on the rod 12, and a collar 18 having a substantially horseshoe-shaped plane and a desired thickness is removably mounted on the collar body 17. . This collar body 18 is also screwed and fixed to the screw rod 12a in the same way as the lift stopper body 13, and a projecting edge 17a is provided on the outer circumference of the upper surface to prevent the collar 18 placed thereon from falling off. It has been done. Further, the collar 18 is formed in a horseshoe shape as shown in FIGS. 3 and 4, and the distance between the inner sides of both openings and the inner diameter are larger than the diameter of the rod 12, and the outer diameter is larger than the flange. It is formed to have a smaller diameter than the inner diameter of wheel 17a, and its thickness is manufactured to a desired thickness according to the shape of wheel A.

Note that in this embodiment, the vertical rods 24,
24 is also disposed via the cylinder 32, so that its rotation radius can be adjusted. That is,
The vertical rods 24, 24 are connected to arms 20a, 20b which are connected to a gear mechanism (not shown) housed in the upper frame 1c, with the fixed shaft 1d as the central axis, and are rotated in opposite directions by electric power or the like. This is the same as before, but a horizontal cylinder 32 is attached to the tip of the arm 20a (the same applies to the arm 20b side, so only the arm 20a side shown in FIG. 5 will be explained below). A key (not shown) is fitted into the groove 31 and arranged so as to be movable in the horizontal direction.A stand 21 is integrally suspended from this cylinder 32, and the vertical rod 24 is fixed to the lower surface of this stand 21. . Then, the piston 33 of the cylinder 32
The tip of the rod 34 is made to protrude toward the rear end of the arm 20a (towards the fixed shaft 1d), and the fixing tool 35
When the cylinder 32 is fixed to the arm 20a through the cylinder 32 and pressurized air is supplied to the lower surface chamber of the piston (the right side of the piston 33 in FIG. 5), the cylinder 32 to the vertical rod 24 move to the right side in FIG. However, when pressurized air is supplied to the upper surface chamber of the piston in the cylinder 32, the cylinder 32 to the vertical rod 24 move to the left in FIG. Further, a rod 37 is provided on the bottom surface of the cylinder 32 to protrude in the opposite direction to the rod 34, and the tip of this rod 37 is connected to the arm 20a.
It penetrates the tip wall 20a' of. A groove 36 is formed on the circumferential surface of the rod 37 at a desired position.
a, 36b, 36d... are arranged, and this groove 36
A, 36b, 36d... can be fitted with pins 38. The pin 38 is attached to the tip wall 20
Grooves 36a, 36b, 36 of the rod 37 protruding from a'
d..., and then return the rod 37 to the left side in FIG.
The cylinder 32 to the vertical rod 24 can be positioned at desired positions by being locked onto the outer surface of the cylinder 0a'.

Further, on the upper surface of the cylinder 32 on the side of the arm 20a, a rod 41 is erected, passing through an elongated hole 39 arranged in the longitudinal direction of the arm 20a. It will be arranged.
This metal plate is used to control the rotation range of the arm 20a by detecting its proximity position with the proximity switches 42, 42'.
2' opens and closes the motor in forward and reverse directions, and the arms 20a,
20b is configured to reciprocate within a certain range. Note that if the rotation range of the arm 20a is controlled, the rotation range of the arm 20b connected to the arm 20a by a gear mechanism is also controlled. Only .

Moreover, the reason why the metal plate 40 is made into a fan shape is that the rotation range of both the arms 20a, 20b is not controlled by the rotation angle, and the rotation of the vertical rods 24, 24 connected to the arms 20a, 20b is not controlled. This is to control the distance between the starting end and the ending end to be constant. That is, the vertical rods 24, 24 are connected to the arms 20a, 20b.
If the arms 20a and 20b are moved to the tip side, it becomes possible to fit a large diameter tire B2 as shown in FIG.
The distance between the vertical rods 24, 24 at the start of rotation with the small diameter tire B1 is L1, but with the large diameter tire B, the distance between them is only L2, and with the large diameter tire B2, the distance between them is only halfway. Wheel A
If the vertical rod 24 is moved toward the ends of the arms 20a and 20b, the metal plate 40 will move in the direction of arrow 44 in FIG.
The rotation range of the arms 20a, 20b is increased as indicated by .

In FIG. 1, reference numeral 22 represents a conventionally known tire pressing roller that is provided as necessary. This pressing roller 22 is connected to a rod of a cylinder 23 mounted on a stand 21 and is movable up and down, and is used to press down the tire B which is opened by the vertical rods 24, 24, and fit it onto the wheel A. Further, 25 is a lifting guide rod for the platform 22.

[Effect of the invention] Since the present invention has the above-mentioned configuration, if a collar 18 with a set thickness is prepared for each wheel A having a different shape, the rod 12 is lowered once and the collar 18 is adapted to the wheel A. After replacing it with a new one, the fixed position of the lifting stopper body 13 can be adjusted by raising the rod 12 again. In particular, the present invention provides vertical cylinder 11
Since the lifting stopper body 13 is raised and lowered by the vertical cylinder 11, the fixing position of the lifting stopper body 13 can be adjusted only manually by switching the supply of pressure fluid to the vertical cylinder 11 and replacing the collar 18. Semi-automation can be realized, and the lifting stopper body 13
Compared to adjusting the fixed position by screwing forward and backward, the adjustment can be made more quickly, and the mechanism is simple and has sufficient strength and effects.

Further, in the present invention, since the fixed position of the lifting stopper body 13 is adjusted by replacing the collar 18, accurate position adjustment is possible with a simple configuration. According to the results of the experiment, it was possible to use a hydraulic cylinder for the vertical cylinder 11 and adjust the fixed position of the lifting stopper body 13 by omitting the collar 18 by controlling the hydraulic circuit. The fact that compressed air, which is originally highly compressible and is not suitable for adjusting the fixed position, can be used as the driving source for the vertical cylinder 11 in combination with the collar 18 is achieved by using the existing equipment described above. In addition to simplification, this has the advantage of not requiring a complicated hydraulic control circuit.

[Brief explanation of the drawing]

Fig. 1 is a front view showing one embodiment of the tire fitting device of the present invention, Fig. 2 is a partial sectional view of the ascending positioning body, and Fig. 3 is a plan view of a collar used in the tire fitting device of the present invention. Fig. 4 is a front view of the same, Fig. 5 is a sectional view of the main part of the arm, Fig. 6 is an enlarged sectional view taken along the line X-X, Fig. 7 is a plan view explaining the operation, and Fig. 8 is a FIG. 9 is a sectional view of the tire and wheel to be worn, and FIG. 9 is a front view of a conventional example. 1a... Machine base, 6... Lifting platform, 10... Lifting positioning body, 11... Vertical cylinder, 12... Rod, 13... Lifting stopper body, 17... Flange body, 1
8...Color, 24...Vertical rod, A...Wheel, A1...Hub hole surface, A2...Rim, B...Tire.

Claims (1)

[Claims for Utility Model Registration] A lifting platform 6 on which a wheel A with a part of a tire B hooked thereon is placed on the machine base 1a, and above the lifting platform 6 there is a hub hole surface A1 of the wheel A. a lifting positioning body 10 that stops the lifting of the lifting platform 6 by receiving the movement of the lifting table 6, and clamps and fixes the wheel A between the lifting table 6; In the tire fitting device, the vertical rods 24, 24 are arranged to fit the tire B onto the wheel A. The rod 12 has a collar body 17 disposed above the lifting stopper body 13, and a collar 18 having a substantially horseshoe-shaped plane and a desired thickness is disposed on the collar body 17. A tire mounting device characterized in that a tire mounting device is removably mounted on the tire mounting device.