JPS604802Y2 - Tire attachment/detachment device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a tire attachment/detachment device used when exchanging automobile tires.

There are already various types of tire attachment/detachment devices used to attach/detach a tire to/from a rim.

However, those that can be easily attached and detached have a complicated structure, and those that have a simple structure have the disadvantage that attachment and detachment are not easy.

The purpose of this invention is to provide a tire attachment/detachment device that has a simple structure and is easy to operate.

An embodiment of this invention will be described based on the drawings.

Reference numeral 1 denotes a main body of the apparatus, which is constructed in the shape of a rectangular box and has a tire stand 3 adjacent thereto having an inclined surface 2.

Reference numeral 4 is a cylinder whose lower end is pivotally attached to a pivot shaft 6 installed on L-beams 5 on both sides of the lower edge of the apparatus main body 1 so as to be swingable.

7, 7 is a swinging arm, and a cylindrical body 8 is integrally provided in the center part.
is rotatably attached to a rotation shaft 9 horizontally suspended on the main body 1 of the apparatus.

Further, the swinging arm 7.7 has one end 7a, 7a pivoted to a pivot shaft 11 attached to cross the tip of a piston rod 10 protruding upward from the cylinder 4, and the other end 7b, 7b to the outside of the device main body 1. It protrudes above the tire stand 3.

Return springs 12, 12 are stretched between each end of the pivot shaft 11 and the pivot shaft 6, respectively.

Reference numeral 13.13 denotes a link, whose upper end is pivotally connected to the other ends 7b, 7b of the swing arm 7.7 and is suspended, and a presser claw plate 14 is provided at the lower end.

A through hole 44 is provided near the other ends 7b, 7b of the swinging arm 7.7, and a two-step pin 45 is movably inserted into the through hole 44 so as to come into contact with the link 13 so that it can be changed for each tire size. It is installed.

Reference numeral 15 denotes a rod-shaped rack, and a cover plate 1 is provided at the upper end of the device main body 1.
A vertical plane 1 is attached to two rollers 18 that are supported by a support plate 17 and attached to a cover plate 16 along the lower surface of the cover plate 16.
9 is attached so as to be able to reciprocate along the lower surface of the cover plate 16 so as to be in contact therewith.

Reference numeral 20 denotes a lever, whose base end 21 is fixed to the swinging arm 7, and its tip is fitted into a groove provided at the end of the rack 15 along with a long hole 22, and a pin 23 is inserted into the long hole 22 to secure the tip of the lever 20. is pivotally connected to the rack 15.

Reference numeral 24 denotes a hollow stand, which is erected on the cover plate 16 by fitting its base end into a through hole 25 provided in the center of the cover plate 16 and fixing it with a bolt 26. It is attached by fitting it on the outside and securing it with screws.

46 is a tightening nut with a conical lower part for fixing the wheel.

Reference numeral 28 denotes a vertical shaft, which is rotatably fitted into the hollow stand 24, and has a tire attachment/detachment rod 30, whose center portion is fitted into the flat portion 29 at the upper end, arranged in a crosswise manner.

Further, a pinion 31 is attached to the lower end of the vertical shaft 28 protruding below the cover plate 16 and meshed with the teeth 32 of the rack 15.

Reference numeral 33 denotes a foot pedal, which is provided at the outer end of a lever part 34 extending outward from the lower end of the apparatus main body 1, and the inner end of the lever part 34 is connected to an operating rod 36 of an air valve 35 provided inside the apparatus main body 1.
is connected to.

37 is an oil tank. The operating mechanism of cylinder 4 is the fourth
As shown in the figure, the inside of the cylinder 4 is separated by a piston 38 into an air chamber 39 and an oil chamber 40, an air tube 41 is introduced from an air valve 35 into the air chamber 3.9, and an oil tank 37 is introduced into the oil chamber 40. Two thin oil tubes 42
．． 43 has been introduced.

To replace a tire, when the foot pedal 33 is stepped on, the actuating rod 34 moves and the air valve 35 opens, opening the air chamber 3.
Since air is press-fitted into the piston 9, the piston 38 is pushed upward together with the piston rod 10 against the return spring 12.

At this time, the oil filled in the oil chamber 40 passes through only the oil tube 42 without passing through the oil tube 43 provided with the check valve 43a, and is gradually returned to the oil tank 3T.

Therefore, the amount of movement of the piston 38 becomes slow, the piston rod 10 gradually rises, and the swinging arm 7.7 rotates in the direction of arrow C to gradually push down the link 13.13.
The presser pawl plate 14 can press the tire B of the wheel placed horizontally on the tire stand 3 to separate it from the rim A, and then when the foot is released from the foot pedal 33, the air in the air chamber 39 is released at the same time. Since the oil in the oil chamber 40 is returned to the oil tank 37 through the oil tube 42.43, the piston 38 is pulled down by the force of the return spring 12.12, thereby causing the swinging arm 7.7 to move in the opposite direction of arrow C. The presser claw plate 14 is pulled up.

After the tire B has been peeled off over its entire circumference in this manner, the wheel is replaced from the tire stand 3 onto the tire support flange 27 and fixed with the tightening nut 46.

In addition, the part where the two-stage pin 45 contacts the link 13...
By adjusting the large diameter portion or the small diameter portion, it is possible to separate tires B having different diameters.

After the wheel is fixed on the tire holder 27 and the removable end 30a of the tire attachment/detachment rod 30 is inserted between the tire B and the rim A, when the foot pedal 33 is stepped on, the cylinder 4 is actuated as described above and the swing arm is moved. 7.7 rotates in the direction of arrow C,
Along with this rotation, the lever 20 rotates in the same direction.

Therefore, the rack 15 moves in the direction of the arrow and the pinion 3
1, the tire attachment/detachment rod 30 rotates together with the vertical shaft 28, and the tire B is removed from the rim A.

When installing tire B, install end 30 of tire removable rod 30.
d between tire B and rim A, and then
This is done by rotating 0.

As described above, this invention includes a cylinder 4 which is pivotably mounted at its lower end in the main body 1 of the apparatus so as to be swingable, and a rotating shaft 9 with the central part of the swinging arm 7.7 horizontally suspended next to the cylinder 4. The tip of the piston rod 10 protruding upward from the cylinder 4 and one end 7a of the swinging arm 7.7 are pivotally connected to the swinging arm 7. A link 13 having a presser claw plate 14 at the lower end is pivotally attached to the other end 7b of the movable arm 7.7 and hangs down.
A bar-shaped rack 1 is installed along the bottom surface of the lid plate 16 provided at the upper end.
5 is attached so as to be reciprocally movable, and the tip of a lever 20 whose base end 21 is fixed to the rotation shaft 9 is pivotally attached to the rack 15, and a hollow stand 24 provided with a tire flange 27 is attached to the lid plate 16.
A vertical shaft 28, which is erected above the through hole 25 and has a tire attachment/detachment rod 30 intersectingly provided at the upper end, is rotatably inserted into the hollow stand 24, and a pinion 31 is provided at the lower end of the vertical shaft 28, and a pinion 31 is provided at the lower end of the vertical shaft 28. The rack 15 is meshed with the rack 15, and the tire B can be reliably attached and detached with a simple structure.

[Brief explanation of the drawing]

The drawings are for explaining one embodiment of the tire mounting/detaching device according to this invention. Fig. 1 is an overall side view, Fig. 2 is a vertical cut pressure surface view of Fig. 1, and Fig. 3 is a cross-sectional view of Fig. 1. 4 is an explanatory diagram showing the operating mechanism of the cylinder. 1... Device main body, 3... Tire stand,
4...Cylinder, 7,7...Swinging arm,? a,? a... One end, 7b, 7b...
...Other end, 9...Rotation axis, 10...
Piston rod, 13, 13...Link, 14
... Presser claw plate, 15 ... Rack, 16
......Lid plate, 20...Lever, 21...
... Base end, 24 ... Hollow stand, 26.
...Through hole, 27...Tire holder, 28.
... Vertical axis, 30 ... Tire attachment/detachment rod, 3
1...Pinion.

Claims (1)

[Scope of utility model registration request] A cylinder is pivotably mounted at its lower end in the device main body, and the central part of the swinging arm is rotatably mounted on a horizontal rotating shaft beside the cylinder, and a piston protrudes upward from the cylinder. The tip of the rod and one end of the swinging arm are pivotally connected, and a link with a presser claw plate at the lower end is pivoted to the other end of the swinging arm, which protrudes above the tire stand outside the main body of the device, and hangs down. In addition, a rod-shaped rack is attached so as to be reciprocally movable along the lower surface of the lid plate provided at the upper end of the device body, and the tip of a lever whose base end is fixed to the rotation shaft is pivotally attached to the rack, and a tire receiving flange is attached. A hollow stand provided with a tire mounting rod is erected over the through hole of the cover plate, and a vertical shaft with a tire attachment/detachment rod arranged in an intersecting manner at the upper end is rotatably fitted into the hollow stand, and a vertical shaft is provided at the lower end of the vertical shaft. A tire attachment/detachment device characterized in that a pinion and the rack are engaged with each other.