JP2007168678A - Solid tire and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solid tire wherein filled synthetic resin is in a substantially uniform foamed state in a tire main body and can harden while keeping that state, and a manufacturing method thereof. <P>SOLUTION: The solid tire T is provided with the tire main body 1, and a wheel 2. On a side surface of the tire main body 1, air holes 11 communicating inside and outside are formed to penetrate at four places at substantially regular intervals in a circumferential direction. On a rim portion 20 of the wheel 2, a valve hole 200 is formed to penetrate. In the tire body 1 while assembled to the wheel 2, urethane resin which is a synthetic resin is filled in a foamed state. The liquid urethane resin 3 is injected into the tire body 1, and then the tire is placed on a top plate 60 of a rotation stand to be rotated in a horizontal direction. Thereby, the urethane resin 3 is distributed all around the inside of the tire body 1 and hardens in the substantially uniform forming state. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a solid tire and a method for manufacturing the same. More specifically, the present invention relates to a resin composition in which a filled synthetic resin forms a substantially uniform foamed state inside a tire body and can be cured in that state.

  Conventionally, tires mounted on mowers, golf course carts, electric wheelchairs, etc. have been filled with synthetic resin such as urethane foamed inside, and those designed to prevent puncture have been used. Yes. For example, Patent Document 1 discloses a solid tire obtained by foaming and filling an elastic synthetic resin inside a tire that is a rubber casing.

Japanese Utility Model Publication No. 6-3701

However, the above-described solid tire has the following problems.
That is, in the above, since the production was completed by simply injecting synthetic resin into the tire, which is a rubber casing, the injected synthetic resin was biased in the foamed state inside the tire. It may harden | cure in this state.

  An object of the present invention is to provide a solid tire and a method for manufacturing the same, in which the filled synthetic resin is allowed to form a substantially uniform foamed state inside the tire body and can be cured in that state.

Means taken by the present invention to achieve the above object are as follows.
The present invention is a solid tire filled with a synthetic resin foamed inside, and includes a tire main body and a wheel, and a liquid is contained inside the tire main body with the wheel attached. A synthetic resin is filled, and the synthetic resin is cured while the tire body is rotated.

  Further, the present invention is a solid tire filled with a synthetic resin foamed inside, and includes a tire body and a wheel having a valve hole, and the valve is attached to the wheel. Install the hole so that it is located on the upper side, fill the tire body with liquid synthetic resin while the tire body is tilted, and the synthetic resin is cured while the tire body is rotated. Features.

  The present invention relates to a method of manufacturing a solid tire in which a synthetic resin is filled in a foamed state, the step of filling a liquid synthetic resin into a tire body with a wheel attached thereto, and the tire Curing the synthetic resin with the main body rotated.

  The synthetic resin filled in the tire body is preferably cured in a state where the tire is rotated in the horizontal direction or substantially in the horizontal direction. However, this is not limited, and for example, it can be cured by rotating in an oblique direction or a vertical direction (longitudinal direction).

  The use application of the solid tire is not particularly limited, and examples thereof include a mower, a golf course cart, an electric wheelchair, a carriage and a carrier.

  In the claims and the column of the next action, each constituent element of the present invention is described by correspondingly assigning a reference numeral given to each part in an embodiment described later. However, the addition of the reference sign is only for easy understanding of the description, and does not mean that each constituent element is limited to the above-described parts.

(Work)
The operation of the present invention will be described.
Solid tires are manufactured by filling the tire body (1) with liquid synthetic resin with the wheel (2) attached, and curing the synthetic resin with the tire body (1) rotated. Is done.

  In addition, the solid tire is installed with the wheel (2) attached so that the valve hole (200) is located on the upper side, and the tire body (1) is tilted inside the tire body (1). It is manufactured by filling a liquid synthetic resin and curing the synthetic resin in a state where the tire body (1) is rotated.

  The synthetic resin filled in the tire body (1) is cured in a state where the tire body (1) is rotated in the horizontal direction or substantially in the horizontal direction.

(A) According to the present invention, the tire body is filled with a liquid synthetic resin while the wheel is attached, and the synthetic resin is cured while the tire body is rotated. It will spread throughout the entire interior. Therefore, the synthetic resin forms a substantially uniform foamed state as a whole inside the tire body and is cured in that state.

(B) Since the synthetic resin is provided by injecting a liquid material into the tire body with the wheel assembled, it hardens and adheres to the inner surface of the tire body and the inner surface of the wheel. become. As a result, the tire body and the wheel are integrated with each other, and slip does not easily occur between the tire body and the wheel.

Embodiments of the present invention will be described in more detail with reference to the drawings.
FIG. 1 shows an embodiment of a solid tire according to the present invention, and is a cross-sectional explanatory view showing a state in which a liquid synthetic resin is injected into the tire body.
FIG. 2 is an explanatory view showing a state in which the urethane resin is cured while rotating the tire body and the wheel after injecting the synthetic resin in the horizontal direction.

The solid tire T includes a tire body 1 and a wheel 2. The tire body 1 uses a convex lug 10 provided over the entire circumference of the tread portion. On one side surface of the tire body 1, air holes 11 communicating with the inside and outside at four locations at substantially equal intervals in the circumferential direction are formed so as to penetrate therethrough.
A valve hole 200 is formed through the rim portion 20 of the wheel 2. The solid tire T shown in the present embodiment is mainly used for a working machine such as a mower.

  A wheel 2 is assembled to the tire body 1. The tire body 1 in a state where it is assembled to the wheel 2 is filled with a urethane resin, which is a synthetic resin, in a foamed state. The urethane resin 3 is cured in a substantially uniform foamed state inside the tire body 1.

A method for manufacturing the solid tire T shown in the present embodiment will be described.
In addition, since the tire main body 1 and the wheel 2 are using the thing of a well-known technique, these description is abbreviate | omitted and it mainly demonstrates hardening from injection | pouring of the urethane resin 3. FIG.

  First, the tire body 1 is assembled to the wheel 2 to form an integrated object. Then, the tire body 1 with the wheel 2 assembled is installed obliquely so that the valve hole 200 is positioned on the upper side. This state may be supported by an operator who injects the urethane resin 3 or his / her assistant.

  The liquid urethane resin 3 is injected from the valve hole 200 of the wheel 2 while the tire body 1 is inclined obliquely. If the size of the valve hole 200 is small and it is difficult to inject the urethane resin 3, the valve hole 200 can be processed and expanded in advance. In this case, since chips of the wheel 2 are generated, it is preferable to carry out before assembly with the tire body 1.

  As the urethane resin 3 to be injected into the tire body 1, a foam resin mixed in advance is used. The urethane resin 3 is injected from the valve hole 200 and filled along the inner wall of the tire body 1. The air inside the tire body 1 is discharged from the air hole 11 and discharged to the outside when the urethane resin 3 is injected. Since the injected urethane resin 3 is mixed with a foaming agent, it begins to foam after being filled into the tire body 1.

  When the free space in the space inside the tire body 1 decreases, the injection of the urethane resin 3 is stopped. After the injection, the stopper hole 4 is attached to the valve hole 200 so that the urethane resin 3 does not leak out. The stopper plug 4 is pressed by the pressing jig 5 so as not to be pushed out from the valve hole 200 by the foamed urethane resin.

  The holding jig 5 has a structure in which a rod-shaped body 51 is advanced and retracted by hooking a part of it to the center hole 21 of the wheel 2 and operating the lever 50. It can be attached by pressing.

  Reference numeral 6 denotes a turntable in which a disk-shaped top plate 60 rotates in a substantially horizontal direction around the center. The tire body 1 to which the pressing jig 5 is attached is placed in a state where it is laid on the top plate 60 so that the air holes 11 are arranged on the upper side. Thus, the tire body 1 is waited for the urethane resin 3 to be cured while rotating the tire body 1 on the top plate 60 in the horizontal direction.

  Since the tire body 1 is rotated by the turntable 6, the urethane resin 3 inside the tire body 1 spreads uniformly over the whole and foams. Therefore, the urethane resin 3 forms a substantially uniform foamed state as a whole inside the tire body 1 and is cured in that state.

  The urethane resin 3 expands to fill the space inside the tire body 1 by foaming, and the tire body 1 itself also expands. Since the urethane resin 3 is cured in this state, the tire body 1 is maintained in an inflated and stretched state.

  Further, the urethane resin 3 foams on the outer side of the air holes 11 so that the liquid before curing overflows and is cured on the tire body 1. This portion is removed by removing the urethane resin so as to be flush with the surface of the tire body 1 after curing. The urethane resin 3 exposed on the surface of the tire body 1 from the air holes 11 is painted in the same black color as the tire body 1 so as not to be noticeable in appearance.

  The holding jig 5 is removed after the urethane resin is cured. The stopper plug 4 may be removed from the urethane resin or may be left as it is. If left behind, the surface of the stopcock 4 is also painted black. In the present embodiment, a black paint is used when the urethane resin 3 and the stopper plug 4 are applied, but this does not limit the color of the paint.

  Since the urethane resin 3 is provided by injecting a liquid material into the tire body 1 with the wheel 2 assembled, the urethane resin 3 is in close contact with the inner surface of the tire body 1 and the inner surface of the wheel 2 by curing. It is in the state. As a result, the tire body 1 and the wheel 2 are in an integrated state, and slip is unlikely to occur between the tire body 1 and the wheel 2.

  In the present embodiment, urethane resin (polyurethane resin) is exemplified as a synthetic resin to be filled in the tire body 1, but this is not a limitation. For example, a polyethylene resin can be used as long as it can be cured in a foamed state in the tire body 1. Polystyrene resin, phenol resin, etc. can also be used.

  In this embodiment, after injecting urethane resin, the tire body 1 is rotated in the horizontal direction. However, this is not limited, and the rotation of the tire body is not in the horizontal direction, for example, in a tilted state. good. That is, it is only necessary that the urethane resin is evenly distributed throughout the tire body 1 by rotating the tire body.

  The terms and expressions used in this specification are merely explanatory and are not limiting at all, and exclude terms and expressions equivalent to the features described in this specification and parts thereof. There is no intention to do. It goes without saying that various modifications are possible within the scope of the technical idea of the present invention.

Cross-sectional explanatory drawing which shows one Embodiment of the solid tire which concerns on this invention, and represents the state which is inject | pouring the liquid synthetic resin into the inside of a tire main body. Explanatory drawing which shows the state which has hardened urethane resin, rotating the tire main body and wheel after inject | pouring a synthetic resin in a horizontal direction.

Explanation of symbols

T Solid tire 1 Tire body 10 Lug 11 Air hole 2 Wheel 20 Rim part 200 Valve hole 21 Center hole 3 Urethane resin 4 Stopper 5 Holding jig 50 Lever 51 Rod-like body 6 Turntable 60 Top plate

Claims (5)

A solid tire filled with a synthetic resin foamed inside,
The tire body (1),
Wheel (2),
With
The tire body (1) is filled with a liquid synthetic resin with the wheel (2) attached, and the synthetic resin is cured while the tire body (1) is rotated.
Solid tire. A solid tire filled with a synthetic resin foamed inside,
The tire body (1),
A wheel (2) having a valve hole (200);
With
With the wheel (2) attached, install it so that the valve hole (200) is located on the upper side, and with the tire body (1) tilted, fill the tire body (1) with liquid synthetic resin. The synthetic resin is cured in a state where the tire body (1) is rotated,
Solid tire. The synthetic resin filled in the tire body (1) is characterized by being cured in a state where the tire body (1) is rotated in a horizontal direction or a substantially horizontal direction,
The solid tire according to claim 1 or 2. A method of manufacturing a solid tire filled with a synthetic resin foamed inside,
Filling the tire body (1) with a liquid synthetic resin with the wheel (2) attached;
Curing the synthetic resin with the tire body (1) rotated;
Including,
Solid tire manufacturing method. The curing of the synthetic resin is performed in a state where the tire body (1) is rotated in a horizontal direction or a substantially horizontal direction,
The manufacturing method of the solid tire of Claim 4.

Images