JPH0728703U - Solid tires, split rims and wheels used therefor - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent a solid tire from falling off and to make it easy to install. A wheel 1 is for a light vehicle, and includes a solid tire 2, a rim 3 including a pair of divided rim portions 3a and 3b, and a disc 4 that connects the rim 3 and a hub 5. ing. The solid tire 2 is made of an elastic body such as a ring-shaped foamed resin and has a fall prevention hole 6 for preventing the fall due to centrifugal force penetrating the inner peripheral side wall. The pair of divided rim portions 3a and 3b respectively support the inner peripheral surface and one side surface of the solid tire 2, and the side walls 12a and 12b are formed with through holes 13a and 13b corresponding to the captive holes 6. . A fall prevention bolt 7 is inserted into the through holes 13a and 13b and the fall prevention hole 6, and the rim 3 of the solid tire 2 is
Is prevented from falling off.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a solid tire mounted on a split rim, a split rim for mounting a solid tire having a drop-out preventing portion that prevents the split tire from falling off, and a wheel including the solid tire and the split rim.

[0002]

[Prior art]

 Generally, solid tires made of elastic material such as urethane foam rubber are used in relatively slow vehicles such as tricycles for children, hand carts for carrying luggage, and forklifts. Recently, solid tires for relatively fast bicycles and motorcycles have also been developed. In this type of solid tire for high-speed vehicles, if the outer diameter of the rim forming the outer edge of the wheel is the same as the inner diameter of the solid tire, it is easy to mount the solid tire on the rim. However, when rotating at high speeds, the centrifugal force causes the solid tire to expand, increasing its inner diameter, which may cause the solid tire to fall off the rim. In order to prevent this, conventionally, the inner diameter of the solid tire was made smaller than the outer diameter of the rim, and multiple solid beads were mounted inside the solid tire to limit outward expansion due to centrifugal force. ing. At the time of mounting, the inner diameter of the solid tire is expanded by an appropriate means, and a tension that resists centrifugal force is applied to the solid tire to mount it inside the rim.

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional structure, since the beads for restraining the expansion and contraction are arranged, a considerably large force is required to increase the inner diameter of the solid tire, and it is difficult to mount the solid tire in the rim. This difficulty in mounting is one of the reasons why solid tires are not widely used even if they are superior in damage resistance and puncture resistance to hollow tires.

An object of the present invention is to prevent a solid tire from falling off and to easily mount it.

[0005]

[Means for Solving the Problems]

 The solid tire according to the present invention is mounted on a split rim and includes a tire body and a fall-off preventing means. The tire body is made of a ring-shaped elastic body. The fall-out preventing means is provided to prevent the tire main body from falling off the split rim due to centrifugal force, and is formed on the inner peripheral side surface of the tire main body.

The split rim according to the present invention is for mounting a solid tire having a drop-out preventing portion that prevents the drop-out due to centrifugal force. This split rim includes a pair of annular rim bodies and engaging means. The annular rim body has a flat portion that supports the inner peripheral surface and one side surface of the solid tire, and a side wall that extends outward from the flat portion. The engagement means is provided on the side wall of the rim body and engages with the dropout prevention portion.

A wheel according to the present invention is for a light vehicle, and includes a solid tire, a pair of rims, and a connecting portion. The solid tire is made of a ring-shaped elastic body and has a drop-out prevention portion on the inner peripheral side surface for preventing the drop-out due to centrifugal force. Each of the pair of rims has an engaging means for supporting the inner peripheral surface and one side surface of the solid tire and engaging with the drop-out preventing portion. The connecting portion connects the pair of rims to the wheel axle.

[0008]

[Action]

 In the solid tire according to the present invention, when the solid tire is mounted on the split rims and the solid tires are arranged between the split rims to integrate the split rims, the detachment formed on the inner circumferential side surface of the tire body is eliminated. The prevention means can prevent the solid tire from falling off without applying tension to the solid tire. Therefore, the solid tire can be prevented from falling off and can be easily mounted.

In the split rim according to the present invention, when the solid tire is mounted by sandwiching the solid tire between the pair of annular rim bodies, the engaging means engages with the drop-out preventing portion to apply tension to the solid tire. Without solid tires can be prevented from falling off. Therefore, the solid tire can be prevented from falling off and can be easily mounted. In the wheel according to the present invention, when the solid tire is arranged between the pair of rims and the pair of rims is fixed, the solid tire is mounted between the pair of rims and the solid tire is removed from the rim. The engagement means engages with the prevention portion. Then, the rim is connected to the axle by the connecting portion.

Here, by simply mounting the solid tire on the rim, it is possible to easily prevent the solid tire from falling off the rim without applying tension to the solid tire. Therefore, the solid tire can be prevented from falling off and can be easily mounted.

[0011]

Embodiment 1 Referring to FIG. 1, a bicycle wheel 1 according to an embodiment of the present invention comprises a solid tire 2 and a pair of divided rim portions 3a, 3b for mounting the solid tire 2 on a rim. 3, a disc 4 composed of two discs sandwiched by the rim 3, and a hub 5 fixed to the center of the disc 4.

As shown in FIG. 2, the solid tire 2 has a structure in which, for example, a tread rubber layer having excellent impact resistance and abrasion resistance is provided on the ground contact side, and urethane foam rubber having a high cushioning property is filled inside the tread rubber layer. Therefore, elastic deformation is possible. As shown in FIG. 3, the solid tire 2 is provided with drop-out preventing holes 6 penetrating the inner peripheral side surface thereof at intervals in the circumferential direction. The entire solid tire 2 may be made of urethane foam rubber.

The rim 3 is composed of a pair of left and right divided rim portions 3a and 3b. The split rim portions 3a and 3b extend from one end of the flat portions 10a and 10b to the flat portions 10a and 10b on which the inner circumferential surface of the solid tire 2 is arranged, and support the inner circumferential side surface of the solid tire 2. It is composed of side wall portions 12a and 12b and mounting portions 11a and 11b extending inward from the other ends of the flat portions 10a and 10b. Mounting holes 16a and 16b for mounting the divided rim portions 3a and 3b to the disc 4 are formed in the mounting portions 11a and 11b at equal intervals in the circumferential direction. As shown in FIG. 3, through holes 13a 1 and 13b 2 are formed in the side wall portions 12a and 12b at positions facing the fall prevention holes 6 of the solid tire 2, respectively. A fall prevention bolt 7 is inserted through the through holes 13a and 13b and the fall prevention hole 6. A captive nut 8 is fastened to the tip of the captive bolt 7 to prevent the solid tire 2 from falling off the split rim portions 3a, 3b.

As shown in FIG. 3, the disk 4 has mounting holes 17 formed at positions facing the mounting holes 16a and 16b. The mounting bolt 14 (FIG. 2) penetrates through the mounting holes 16a, 16b, and 17. A mounting nut 15 is screwed into the tip of the mounting bolt 14, and the split rim portions 3 a and 3 b are fastened to the disc 4 by the mounting bolt 14 and the nut 15. A hub 5 is fixed to the center of the disc 4. A hub shaft 20 is rotatably provided at the center of the hub 5.

Next, a procedure for assembling the wheel 1 will be described. Before assembling the wheel 1, first, an assembly in which the disk 4 is fixed to the hub 5, the split rim portions 3a and 3b, and the solid tire 2 are prepared. At the time of assembly, first, the disk 4 is arranged on the inner peripheral side of the solid tire 2. Then, the divided rim portions 3a and 3b are arranged on both sides of them. Then, the divided rim portions 3a and 3b are fastened to the disk 4 by the mounting bolts 14 and nuts 15. Then, the through hole 13a and the captive hole 6 are opposed to each other, and the captive bolt 7 is inserted therein. Finally, the captive nut 8 is tightened to complete the assembly.

Here, it is possible to easily prevent the solid tire 2 from falling off from the split rim portions 3a and 3b by the fall prevention bolt 7 and the nut 8 without applying tension to the solid tire 2. Therefore, it is easy to mount the solid tire 2 on the rim 3. Example 2 Instead of opening the drop-out prevention hole 6 in the solid tire 2 and inserting the drop-out prevention bolt 7 to prevent the solid tire 2 from falling off, as shown in FIGS. 5 and 6, the split rim portions 3a, 3b are Annular engagement protrusions 18a, 18b for preventing falling are provided on the inner walls of the side wall portions 12a, 12b, and annular concave grooves 19a engaged with the engagement protrusions 18a, 18b are formed on both inner peripheral side surfaces of the solid tire 2. , 19b may be formed. By engaging the engaging projections 18a, 18b with the concave grooves 19a, 19b, movement of the solid tire 2 in the circumferential direction can be restrained, and falling off due to centrifugal force can be prevented. Other configurations are common to the embodiment shown in FIG.

When assembling the wheel configured as described above, as shown in FIG. 6, the solid tire 2 and the disc 4 are arranged by being sandwiched between the split rim portions 3a and 3b, and the engagement protrusion 18a, The divided rim portions 3a and 3b are attached to the disc 4 by the mounting bolts 14 and nuts 15 so that the groove 18a and the concave grooves 19a and 19b face each other. As a result, the solid tire 2 is mounted on the split rim portions 3a and 3b. At this time, the engaging protrusions 18a, 18b are engaged with the concave grooves 19a, 19b, so that the solid tire 2 can be prevented from coming off due to the centrifugal force.

[Other Embodiments] (a) In the embodiment shown in FIG. 2, the divided rim portions 3a and 3b and the divided disc portions 4a and 4b may be integrally formed as shown in FIG. . In this case, the hub 5 is also composed of the divided hub portions 5a and 5b. (B) In the embodiment shown in FIG. 5, the divided rim portions 3a and 3b and the divided disc portions 4a and 4b may be integrally formed as shown in FIG. (C) In the embodiment shown in FIG. 5, it is not necessary to form the engagement protrusions 18a and 18b in an annular shape over the entire circumference of the inner walls of the side wall portions 12a and 12b. For example, the engagement protrusions 18a and 18b may be shaft-like members that protrude from the inner walls of the side wall portions 12a and 12b. In this case, round holes may be formed in the solid tire 2 instead of the concave grooves 19a and 19b.

[0019]

[Effect of device]

 According to the present invention, since the solid tire is provided with the fall prevention portion and the divided annular rim is provided with the engaging means for engaging with the fall prevention portion, it is not necessary to apply tension to the solid tire. Therefore, it is possible to prevent the solid tire from falling off the rim and to easily mount the tire.

[Brief description of drawings]

FIG. 1 is a side view of a wheel according to an embodiment of the present invention.

FIG. 2 is a half sectional view thereof.

FIG. 3 is a partial sectional view showing an assembly procedure.

FIG. 4 is a diagram corresponding to FIG. 1 of the second embodiment.

FIG. 5 is a diagram corresponding to FIG. 2 of the second embodiment.

FIG. 6 is a diagram corresponding to FIG. 3 of the second embodiment.

FIG. 7 is a diagram corresponding to FIG. 2 of another embodiment.

FIG. 8 is a view corresponding to FIG. 5 of still another embodiment.

[Explanation of symbols]

 1 Wheel 2 Solid Tire 3 Rim 3a, 3b Divided Rim Part 4 Disc 4a, 4b Divided Disc Part 5 Hubs 5a, 5b Divided Hub Part 6 Fall Prevention Hole 7 Fall Prevention Bolt 8 Fall Prevention Nuts 10a, 10b Flat Part 12a, 12b Side Wall Part 18a, 18b Engagement protrusion 19a, 19b Recessed groove 20 Hub shaft

Claims (3)

[Scope of utility model registration request] 1. A solid tire mounted on a split rim, comprising: a tire main body made of a ring-shaped elastic body; and a centrifugal force applied from the split rim formed on an inner peripheral side surface of the tire main body. A solid tire equipped with a fall prevention means for preventing the tire body. 2. A split rim for mounting a solid tire having a drop-out preventing portion for preventing the drop due to centrifugal force, the flat portion supporting the inner peripheral surface and the side surface of the solid tire, and the flat portion. A split rim comprising: a pair of annular rim bodies having outwardly extending side walls; and engaging means provided on the side walls of the annular rim body and engaging with the drop-out preventing portion. 3. A wheel for a light vehicle, comprising a ring-shaped elastic body, and a solid tire having a drop-out preventing portion on the inner peripheral side surface for preventing drop-off by centrifugal force; A pair of rims that support the inner peripheral surface and one side surface and that are provided with engaging means that engages with the drop-out prevention portion; and a connecting portion that connects the pair of rims to the axle of the wheel. Wheel.