JPS6349361Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a portable tire attachment/detachment device, and more particularly to a device for attaching/detaching pneumatic tires of large buses, trucks, etc. from wheels.

Conventionally, tire attachment/detachment devices for this type of pneumatic tires have often been large and stationary types, which are expensive to manufacture, occupy a considerable amount of space for installation, and require maintenance and management when not in use. is also troublesome.

For this reason, the present applicant had previously devised a portable tire removal device and filed an application under Utility Application No. 56-164089, but the device itself consists of several members and assembly and disassembly are complicated. Moreover, it requires operations such as jacking and reversing the tires when attaching and detaching, which is not always completely satisfactory.

From this viewpoint, the present invention was made with the aim of reducing the number of parts required for assembling and disassembling the device, simplifying the structure, and providing a portable tire detaching device that is easy to attach and detach. .

The present invention will be explained below based on drawings showing embodiments.

FIG. 1 shows a schematic sectional view of the present invention, and the apparatus A of the present invention includes a frame 1, a first pressure cylinder 2, a second pressure cylinder
It consists of a pressurizing cylinder 3, a horizontal bar 4 with a tire attachment/detachment piece, a wheel mounting table 5, etc.

The frame 1 has a cylindrical shape, and the diameter of its upper edge 1a is formed to a diameter that allows the tire b to be placed thereon.A disc-shaped flange (not shown) is provided around the upper edge 1a to accommodate the tire 6. The device may be placed stably and the device may be easily transported. The first pressurizing cylinder 2 is fixedly housed at a central position within the frame 1, and is received at the upper end of a piston rod 7 that is driven up and down by a fluid such as air or oil via a piston plate 8 inside the cylinder. A arm-shaped horizontal bar 4 is detachably inserted into the piston rod 7 via a metal fitting 9.

Any appropriate means can be used as this insertion means. For example, the receiving metal fitting 9 is formed into a cylindrical body with a protrusion 9' at the lower end, and the inner periphery of this cylindrical body and the piston rod 7 are After threading male and female screw grooves on the outer periphery of the tip and screwing the receiving metal fitting 9 onto the piston rod 7, the receiving metal fitting 9 is inserted through a hole provided in the center of the horizontal bar 4 to complete the horizontal rod 4 receiving metal fitting. 9, and then by screwing a nut 12 into a slot (not shown) drilled in the tip of the piston rod 7 via a washer 11, it can be attached and detached and rotated horizontally. Attach to.

Furthermore, support pieces 13 are fixedly suspended from both ends of the horizontal bar 4 by tightening bolts or the like, and a detachable piece 15 is swingably attached to the lower end of the support piece 13 via a pin 14.

Next, the second pressurizing cylinder 3
The upper ends of piston rods 16 are fixedly housed at symmetrical positions on both sides of the pressurizing cylinder 2, and are driven vertically up and down via a piston plate 7 by a fluid such as air or oil, similar to the first pressurizing cylinder. A wheel mounting base 5 for a tire is fixedly attached to the tire. This mounting table 5 may be formed into an integral ring shape, or may be formed separately for each piston rod by cutting the ring in half, but in any case, the outer diameter of the ring is the same as that of the wheel 18. The length is adjusted so that it can engage and support the tip flange 18a. In the figure, 18b is a bulge of the wheel 18, 19 and 20 are bearings for the piston rods 7 and 16, and 21 is a side ring of the wheel 18.

Next, the operation of the present invention will be explained.

First, as shown in FIG. 1, the horizontal bar 4 is removed from the receiving fitting 9, the piston rod 7 of the first pressurizing cylinder 2 is lowered, and the second pressurizing cylinder 3 is operated to raise the piston rod 16 to remove the tire. 6 is placed on the upper edge 1a of the frame 1, and the distal end flange 18a of the wheel 18 is engaged with the peripheral edge of the mounting table 5 to set it.

Next, the first pressurizing cylinder 2 is operated to raise the piston rod 7 and the horizontal bar 4 is inserted and fixed in the receiving metal fitting 9. 6 and the side ring 21 of the wheel. Next, when the pressurizing cylinder 2 is operated to lower the horizontal bar 4 together with the piston rod 7, the inner edge 6a of the tire 6 is deformed by the pressure of the detachable piece 15 and becomes the state shown by the dashed line. is detached from the wheel 18 and side ring 21. Perform the above detachment operation on the tire 6.
By changing the position and repeating the process two to three times, all the inner edge parts 6a of the tire 6 can be easily detached from the side ring 21.

Next, after removing the side ring 21 from the wheel 18 in a conventional manner, the second side ring 21 is removed from the wheel 18 as shown in FIG.
The pressurizing cylinder 3 is operated to lower the piston rod 16, the horizontal bar 4 and the receiving fitting 9 are removed from the piston rod 7, and the wheel plate 22 is placed on the bulge 18b of the wheel 18. In addition, the wheel plate 22
has a diameter that allows it to be placed on the wheel bulge 18b, and is configured in the shape of a disk with a hole in the center through which the piston rod 7 is inserted. Next, after setting the receiving fitting 9 on the piston rod 7, when the pressurizing cylinder 2 is operated to lower the piston rod 7, the wheel 18, from which the inner edge 6a of the tire 6 has already been removed, is pushed down by the wheel plate 22. While the tire 6 is held on the upper edge of the frame 1, it is detached from the inner edge 6b of the tire 6 and placed on the mounting table 5 which is descending as shown in FIG. 2, completing the tire attachment and detachment operation.

Incidentally, in the above, the operation of raising and lowering the piston rod by the first and second pressurizing cylinders can be easily performed by a known drive mechanism (not shown) using pneumatic or hydraulic pressure.

As described above, the present invention houses a first pressurizing cylinder and a second pressurizing cylinder in a frame whose upper edge is a tire support part, and both ends are attached to the upper end of a piston rod that is raised and lowered by the first pressurizing cylinder. This is a tire attachment/detachment device that is constructed by detachably inserting a horizontal bar with a tire detachment piece hanging down from the top and a wheel mounting stand fixed to the upper end of a piston rod that is raised and lowered by a second pressurizing cylinder. Therefore, all the device parts are housed within the cylindrical frame, and the frame itself also serves as a support for the tires, simplifying the structure of the device, making transportation and maintenance easy, and manufacturing costs low. In addition, there is no need to assemble or disassemble many parts during use, and there is no need to turn the tire over midway, so the installation and removal operations are greatly simplified. Furthermore, since most of the attachment/detachment operations are performed by operating the pressurized cylinder, it has excellent practical effects, such as greatly reducing labor.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view of the present invention, and FIG. 2 is a schematic cross-sectional view showing the use of the present invention. 1... Frame body, 2... First pressurizing cylinder, 3... Second
Pressure cylinder, 4... Horizontal bar, 5... Mounting stand, 6... Tire, 7, 16... Piston rod, 9... Receiver, 1
5... Detachable piece, 18... Wheel, 21... Side ring, 22... Wheel plate.

Claims (1)

[Scope of utility model registration request] A first pressurizing cylinder and a second pressurizing cylinder are housed in a frame whose upper edge is a tire support part, and tire detachable pieces are provided at both ends of the upper end of a piston rod that is raised and lowered by the first pressurizing cylinder. A tire attachment/detachment device characterized in that a vertical horizontal bar is removably inserted, and a wheel mounting stand is fixed to the upper end of a piston rod that is raised and lowered by a second pressurizing cylinder.