JP2593129Y2 - Tire changing equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire changing device for assembling and removing tires from tire wheels of automobiles and other vehicles, and more particularly to a horizontal turntable for mounting tire wheels. A plurality of radial sliding grooves formed in the turntable,
A plurality of clamp pieces that fit in these sliding grooves and slide in the radial direction and one end of each of these clamp pieces is rotatably connected to a horizontal plane, and the other end of each is a rotatable rotating plate. The present invention relates to a tire changing device including a link pivotally connected on a horizontal plane and a cylinder device for driving at least one clamp piece in a radial direction.

[0002]

2. Description of the Related Art Conventionally, a tire changing apparatus of this type includes a machine base, a support provided on the machine support, a mounting head supported on the support via a swing arm and a spindle, and a tire wheel. And a turntable for mounting and fixing the tire (see Japanese Utility Model Publication No. 5-6166). A tire wheel mounted on a horizontal turntable is gripped by a plurality of clamp pieces arranged around the tire. With the tip of the mounting head fixed and inserted between the tire wheel and the bead of the tire, the tire wheel is rotated by rotating the turn wheel to replace the tire.

[0003]

In such a conventional tire changing device, a cylinder device drives one or a pair of clamp pieces in a radial direction, and a rotary plate is driven through a link of the driven clamp pieces. , And the remaining clamp pieces are radially driven by another link connected to the rotating plate. In this case, since a plurality of links are pivotally mounted on one surface of the rotating plate, adjacent links interfere at a certain rotating angle (about 90 °) of the rotating plate, and the rotating angle of the rotating plate can be increased. Did not. Therefore, it has been difficult for some devices to adapt to small-diameter tires, and it has not been possible to cope with various tire wheels having different diameters over a wide range. Therefore, there is a problem that it is necessary to prepare respective tire changing devices for various tire wheels having different diameters over a wide range.

The present invention has been made to solve such a problem, and an object of the invention is to provide a tire changing device which can be applied to various tires having different diameters over a wide range.

[0005] In order to achieve the above object, the present invention provides:
A horizontal turntable for mounting a tire wheel, a plurality of radial sliding grooves formed on the turntable, and a plurality of clamps which fit in these sliding grooves and slide in the radial direction. A piece, a link connected at one end to each of the clamp pieces so as to be pivotable in a horizontal plane, and a link connected at the other end to a rotatable rotating plate so as to be pivotable in a horizontal plane; and at least one clamp piece having a diameter. In a tire changing device including a cylinder device driven in a direction, each of the links is pivotally connected to the clamp piece and the rotating plate so as to be able to pivot on a different horizontal plane from a link adjacent to each other.

[0006]

Since each link is pivotally connected to the clamp piece and the rotary plate so as to be rotatable on a different horizontal plane from the link adjacent to each other, the link adjacent to the rotary plate is vertically overlapped with each other. By turning to, it is possible to adapt to a tire wheel having an extremely small diameter. Therefore, it is not necessary to prepare tire changing devices for various tire wheels having different diameters over a wide range.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to a tire changing device shown in the drawings. In the drawings, the same or corresponding portions are denoted by the same reference characters.

In FIG. 1, reference numeral 1 denotes a tire changing device, which includes a machine base 2, a support 3, a swing arm 4, a spindle 5, a mounting head 6, and a horizontal turntable 7. As shown in FIG. 2, the horizontal turntable 7 has four sliding grooves 8, 8, 8 ',
8 'are formed, and the respective sliding grooves 8, 8, 8', 8 'have hanging parts 10, 10, 1 of clamp pieces 9, 9, 9', 9 '.
0 'and 10' are fitted. Each clamp piece 9,
Reference numerals 9, 9 'and 9' clamp the rim of the tire wheel to grip and fix the tire on a horizontal turntable.

The swing arm 4 is rotatably supported by the column 3, and supports the spindle 5 at one end so as to be able to move up and down. At the tip of the spindle 5, a mounting head 6 is provided. The mounting head 6 is provided with a wide roller 6a and a protection roller 6b. When removing the tire, the wide roller 6a is brought into contact with the rim of the tire wheel, and the tip of the protection roller 6b is hooked on a bead of the tire. The tire is rotated by a turntable 7 which is rotated by a rotating means (not shown) (for example, refer to Japanese Patent Application No. 4-64088) while the head 6 is stopped. When assembling the tire, the tire is rotated by rotating the turntable 7 with the mounting head 6 stopped with the flange of the wide roller 6a hooked on the bead of the tire. In addition, 1
Reference numeral 2 denotes a rotation axis of the turntable 7.

As shown in FIGS. 1 and 3, the cylinder device 15 includes a clamp piece 9 on the turntable 7.
9 and the turntable 7 from the clamp pieces 9 and 9
Hanging downwards 10, 10 and these hangings 1
Pistons 13, 13 ′ whose one ends are rotatably fixed via a connecting rod 21 to one of 0 and 10, and a cylinder 1 whose rear end is rotatably fixed via a connecting rod 22 to the other.
4, 14 '. Reference numerals 11 and 11 denote springs for urging the clamp pieces 9 and 9 in the center direction. One end of each of the links 17, 17 is fixed to the hanging portions 10, 10 of a pair of clamp pieces 9, 9 to which the cylinder device 15 is connected so as to be pivotable in a horizontal plane, and the other end of each of them is attached to the surface of the rotary plate 20. It is fixed so as to be pivotable on a horizontal plane. One end of each of the links 19, 19 is fixed to the back surface of the rotary plate 20 so as to be pivotable in a horizontal plane, and the other end of each of the links 19, 19 'is a hanging part 10', 10 'of the remaining clamp piece 9', 9 '(shown in the figure). No) is fixed so as to be pivotable on a horizontal plane. Reference numerals 16 and 18 denote auxiliary rotating plates integrally assembled with the rotating plate 20 to ensure the support of each link.

A pair of clamp pieces 9, 9 facing each other are driven in the radial direction by the expansion and contraction of the cylinder device 15, and the hanging parts 10, 10 of the clamp pieces 9, 9 are formed.
The rotating plate 20 is rotated by the links 17 and 17 which are rotatably fixed on the horizontal surface of the rotating plate 20, and the rotating plate 20 and the hanging portions 10 'and 10' of the other pair of clamp pieces 9 'and 9' Link 19,1 fixed so as to be able to turn with
9, the other pair of clamp pieces 9 ', 9' make a similar movement. Thus, the rim of the tire is gripped from all sides by the four clamp pieces 9, 9, 9 ', 9' and fixed on the turntable 7.

When replacing a small-diameter tire, the clamp pieces 9, 9 are pulled toward the center by contracting the pistons 13, 13 'of the cylinder device 15, and the links 17, 17, the rotating plate 7, the link 19, The clamp pieces 9 ′ and 9 ′ are also drawn to the center via 19. In this case, when the link 17 and the link 19 are on the same plane, the link 17 and the link 19 interfere with each other, and the rotary plate 7 can be rotated only up to a position indicated by a substantially solid line in FIG. In this embodiment, the rotating plate 20
A link 17 and a rotating plate 20 which are pivotally fixed to the surface of the clamp piece 9 and a predetermined position of the hanging part 10, 10 of the clamp piece 9, 9.
And the hanging parts 10 ', 1 of the clamp pieces 9', 9 '
The link 19, which is pivotally fixed at a predetermined position of 0 ', is spaced apart from the rotation plane by the thickness of the rotating plate 20, so that the two links 17 and 19 do not interfere with each other. Link 1 until the position indicated by the two-dot chain line
7 'and link 19' can move. In this case, the rotating plate 7 can rotate to the position 7 '.
Therefore, the clamp pieces 9, 9 and 9 ', 9' can be brought very close to the center, and a small-diameter tire, which cannot be gripped by the conventional device, can also be gripped and fixed.

In the above embodiment, the cylinder device is provided between the hanging portions of the opposed clamp pieces. However, the same operation can be achieved even if the cylinder device is provided between the hanging portion of only one clamp piece and the machine base. It is clear that the effect can be obtained, and in that case, it is advantageous to use one cylinder of the cylinder device.

The number of clamp pieces can be appropriately selected, and at least one of the clamp pieces may be driven.

[0015]

According to the present invention, the link transmitting the driving force from the driven clamp piece is connected to the clamp piece and the rotating plate so that the link can rotate on a different horizontal plane from the adjacent link. Therefore, it is possible to adapt to various tires having different diameters over a wide range by expansion and contraction of the cylinder device without interference between the links.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a tire changing device showing an embodiment of the present invention.

FIG. 2 is a plan view of the tire changing device of FIG.

FIG. 3 is an enlarged plan view of a main part showing a cylinder device and each link.

FIG. 4 is a side view of each link supported by the rotating plate.

FIG. 5 is an explanatory diagram showing a rotational relationship between a rotating plate and a link.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tire changing device 2 Machine stand 3 Support 4 Swing arm 5 Spindle 6 Mounting head 7 Turntable 8, 8 'Sliding groove 9, 9' Clamp piece 10, 10 'Hanging part 13 Piston 14 Cylinder 15 Cylinder device 17, 19 Link 20 rotating plate

Claims (1)

(57) [Scope of request for utility model registration] 1. A horizontal turntable on which a tire wheel is mounted, a plurality of radial sliding grooves formed on the turntable, and radially sliding by fitting into these sliding grooves. At least one of a plurality of moving clamp pieces, a link connected at one end to each of the clamp pieces so as to be pivotable in a horizontal plane, and a second end pivotally connected to a rotatable rotating plate at each other end; Wherein the links are pivotally connected to the clamp pieces and the rotating plate such that the links can pivot on a different horizontal plane from the links adjacent to each other. A tire changing device characterized by the above-mentioned.