JPH0655813U - Wheel - Google Patents

Abstract

(57) [Abstract] [Purpose] Easy structure of a wheel that is not easily punctured even by piercing with nails, etc. [Composition] Wheel A composed of a cushioning material 3 interposed between a tire 1 and a tube 2, The cushioning material 3 is a cellular rubber,
Alternatively, a wheel A configured as a foamed plastic, and a wheel A configured by providing the cushioning material 3 in the circumferential direction of the wheel.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to improvement of wheels, and in particular to provision of various wheels having rubber tires so as to prevent damage to tubes forming the wheels as much as possible.

[0002]

[Prior art]

 Various types of vehicle machinery used as means of transportation or means of play, such as passenger cars, light passenger cars, trucks, buses, construction machinery, industrial vehicles, motorcycles, agricultural machinery, etc., or wheels of two-wheeled bicycles, three-wheeled bicycles, etc. Typically, a tire made of rubber having a tube inside is wound with or without a flap so that the tire opening edge is fitted in the groove of the rim.

[0003]

[Problems to be solved by the device]

 Tires that make up this type of wheel are usually made of a soft rubber tube, to protect the tubes used as cushioning means for the wheel, to shape the outer circumference of the wheel, or in contact with the ground. In many cases, the purpose is to prevent slippage and to provide the wheel with a unique cushioning action, to reduce the weight of the wheels, and to reduce the cost. It is often found that the rubber material reinforced by the reinforcing means is formed into an annular shape having a required thickness.

However, in this type of wheel, when the wheel gets on a pierceable object such as a nail, when the wheel rides on the wheel, the nail or the like often sticks into the tube together with the tire, The tube was damaged by a relatively short nail, and the air enclosed in the tube leaked out.

The wheel according to the present invention is intended to provide a tire that uses a conventional rubber tire, is hard to be punctured without making the tire particularly thick, and has a sufficient cushioning function at a low price.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the wheel according to the present invention is, in the invention of claim 1, a wheel having a structure in which a cushioning material 3 is interposed between a tire 1 and a tube 2 which constitute a wheel A. There is.

According to the second aspect of the invention, the cushioning material 3 interposed between the tire 1 constituting the wheel A and the tube 2 is made of a cellular rubber material or a foamed plastic material.

According to the third aspect of the present invention, as a wheel having a structure in which the cushioning material 3 interposed between the tire 1 and the tube 2 that form the wheel A is provided in the circumferential direction of the wheel A that is formed. There is.

[0009]

[Action]

 The external force acting on the tire 1 is buffered by the buffer material 3 and then buffered by the tube 2.

[0010]

【Example】

 Hereinafter, a typical embodiment of the wheel according to the present invention will be described. FIG. 1 shows an external appearance of an embodiment of a wheel according to the present invention, and FIG. 2 shows an enlarged cut end surface of a YY portion of FIG. Further, FIG. 3 shows a second embodiment by a cut end face, and shows a wheel according to another embodiment by cutting the wheel at substantially the same position as YY in FIG.

In FIG. 2, 1 is a rubber tire, 2 is a tube made of a soft rubber tube, 3 is a cushioning material, and 4 is a rim portion.

The rim portion 4 is provided on the outer circumference of a disk portion 6 having a bearing portion 5 to which an axle hub or the like is attached at the center, and a circumferential groove 4a is provided on the outer circumferential side. Further, an insertion hole for the valve 7 is formed in the rim portion 4 from the circumferential groove 4a toward the center of the disc portion 6.

The tire 1 is a rubber ring-shaped body reinforced by a reinforcing means such as cloth, fiber, and steel wire, and has a hollow structure opened in the center direction of the ring-shaped body. That is, the cushioning material 3 is fitted into the installation side of the tire 1, and the tube 2 is fitted into the opening side, that is, the center side of the tire 1. The illustrated example shows a tire that constitutes a small wheel, and shows the configuration required for the small wheel. Therefore, for wheels corresponding to the purpose of each vehicle such as a passenger car, tires (not shown) having various structures corresponding to the respective purposes are used.

The cushioning material 3 fitted into the tire 1 is mainly a cellular rubber material, a soft foam plastic material or the like, and the closed cell type is preferable from the viewpoint of the cushioning function, but it is an open cell type or a continuous cell and closed cell. It may be a mixed type with. Further, the cushioning material 3 may be formed in an annular shape, or may be formed in an annular shape when fitted into the tire 1. Here, the cellular rubber material refers to a rubber product having a low apparent specific gravity having a cell structure, such as sponge rubber, foam rubber, and expanded rubber.

The cushioning material 3 which is fitted into the tire 1 is usually provided in the tire 1 so that the tip of the nail or the like does not reach the tube 2 when the nail or the like is pierced into the tire 1. In the illustrated example, a relatively small wheel, such as a wheel of a three-wheeled bicycle for children, is shown, and it is configured so that about half of the hollow portion of the tire 1 is buried. ing. Therefore, the width L of the tire 1 naturally becomes large in a passenger car having a large rim diameter, and in comparison with the width L of the tire 1, the ratio of the cushioning material 3 fitted into the tire 1 to the width L of the tire 1 However, the cushioning material 3 is fitted into the tire 1 so that 1/3 to 1/5 of the width L of the tire 1 is filled.

When the cushioning material 3 is composed of a single-celled cellular rubber material or a foamed plastic material, the change of the cushioning material 3 due to an external force applied to the tire 1 can be further reduced. If, after the nail that has been pierced is pulled out, pressure in the compression direction is applied to the cushioning material 3 by the tube 2 and the tire 1, the pulling-out mark of the nail tends to be narrowed. The cushioning material 3 may have a sealing function even when a small hole is formed by being stuck by.

Next, the tube 2 attached to the tire 1 may be any one as long as it has a hollow portion having a size that fills a space not filled with the cushioning material 3 in the tire 1 attached to the rim portion 4, and has a ring shape. It is made of rubber and is typically made of soft rubber. Further, the valve 2 is provided on the tube 2.

After the cushioning material 3 is fitted into the hollow portion of the tire 1 having such a structure and the tube 2 is fitted into the remaining hollow portion, the valve 7 is surrounded by the hole provided in the rim portion 4. The tire 1 is wound around the rim portion 4 so as to protrude from the side of the groove 4a toward the center of the wheel A and to fit the groove-shaped opening edge of the tire 1 into the circumferential groove 4a of the rim portion 4. Configure the wheel A. Then, air is injected into the tube 2 using the valve 7 having a check valve so that the tire 1 can withstand running.

Next, a second embodiment shown in FIG. 3 will be described. The wheel A according to the embodiment shown in FIG. 3 has a surface 3a on the ground side of the cushioning material 3 fitted in the tire 1 and an inner surface 1a on the ground side of the tire 1. The cushioning material 3 is fitted in the tire 1 so as to form the closed space 8. In addition, in the second embodiment, all the structures other than the structure forming the closed space 8 are the same as those of the wheel A according to the first embodiment, and the same components are designated by the same reference numerals. And the description is omitted.

As described above, the wheel A constructed by sequentially providing the closed space 8, the cushioning material 3, and the tube 2 from the ground contact surface side of the tire 1 has different cushioning functions, respectively. It is possible to save the amount of cushioning material 3 used.

In each of the above embodiments, the cushioning material 3 is provided only on the ground side of the tube 2 in the wheel A to be constructed, but the cushioning material 3 is in contact with the tube 2. It is also possible to provide a concave groove in the groove and to accommodate the tube 2 in the concave groove (not shown).

[0022]

[Effect of device]

 In the wheel A according to the present invention, the cushioning material 3 is fitted in the hollow portion on the ground contact surface side of the tire 1, and the tube 2 is incorporated between the cushioning material 3 and the rim portion 4. Also, even if the tire 1 is pierced by a nail or the like, the tube 2 is prevented from being damaged. Further, by making the cushioning material 3 a cellular rubber material or a soft foam plastic material, the tube 2 can be made small in diameter, and the manufacturing cost of the wheel A can be reduced. Furthermore, it is possible to avoid accidents caused by punctures while driving, and also when the tube loses its internal pressure due to punctures, the cushioning material 3 leaves a cushioning function against the rim portion 4 to prevent accidents from occurring. Have an effect on.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a typical wheel according to the present invention.

FIG. 2 is a cut end view of the same main part

FIG. 3 is a cutaway end view of a main portion of a wheel according to another embodiment.

[Explanation of symbols]

 1 tire 2 tube 3 cushioning material

Claims (3)

[Scope of utility model registration request] 1. A wheel characterized in that a cushioning material is provided between a tire forming the wheel and a tube. 2. The wheel according to claim 1, wherein the cushioning material is cellular rubber or foamed plastic. 3. The wheel according to claim 1, wherein the cushioning material is provided in a circumferential direction of the wheel.