JP3164894U - Caster structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a caster structure capable of extending the service life of casters. A caster structure includes a caster body 20, a bush 21, a bearing 22, a vertical axis upper cover 23, a vertical axis 24, a T-shaped bush 25, a pad 26, and a nut 27. The caster body 20 houses the bush 21 and the bearing 22 and has a storage tank 201 provided with a through hole 203 in the center. The bush 21 is provided with a through hole 210 through which the bearing 22 penetrates in the center. The T-shaped bush 25 is provided with a through hole 250 through which the longitudinal axis 24 penetrates in the center. The bush 21 and the bearing 22 are stored in a storage tank 201 provided in the caster body 20. [Selection] Figure 2

Description

  The present invention relates to a caster for a chair, and more particularly to a caster structure having a long service life.

  Please refer to FIG. As shown in FIG. 7, the conventional caster 1 used in a commercially available chair includes a caster body 10, a shaft rod 11, a lower cover 12, and rotating members 13 and 14. An upper cover 110 is integrally formed on the shaft rod 11, and the lower cover 12 and the caster body 10 are movably connected to the bottom. A spherical rotary member 13 is disposed between the upper cover 110 of the shaft rod 11 and the top surface of the caster body 10. Since the spherical rotating member 14 is arranged between the lower cover 12 and the bottom of the caster body 10, the caster 1 rotates smoothly. However, the conventional caster 1 has the following drawbacks in use. Since the distance between the upper cover 110 and the lower cover 12 of the caster 1 is narrow, and the load resistance of the shaft rod 11 and the caster body 10 is small, there is a risk of damage if used for a long time under a heavy load, and the side force. Since the load resistance with respect to is small, there is a possibility that the shaft rod 11 is loose and easily wobbles when used for a long period of time.

  Since the conventional casters 1 are all made of metal, there is a problem that when they are in contact with each other, noise is generated and the manufacturing is not easy and the manufacturing cost is high.

  Therefore, the first object of the present invention is to improve the load resistance of the caster and the load against the side force by combining the parts at the lower part of the long vertical axis, and to improve the caster's service life. To provide a structure.

  The second object of the present invention is to increase the load resistance of the bearing and the caster body by increasing the distance of the lower part of the vertical axis when a load is applied to the chair. An object of the present invention is to provide a caster structure that prevents the vertical axis from loosening and wobbling even when used for a long period of time because the load resistance against the side force of the letter-shaped bushing can be improved, thereby extending the service life of the caster.

  The third object of the present invention is to place a bush between a bearing made of iron and a caster body made of iron, adjust the size of the bush to bring the bearing and caster body into close contact with each other, It is an object of the present invention to provide a caster structure that prevents noise from being generated by hitting a caster body made of iron.

  The fourth object of the present invention is to cover the caster body and the lower end of the longitudinal axis with a T-shaped bush arranged between the longitudinal axis made of iron and the caster body made of iron, and the strength of the longitudinal axis and the caster body. Another object of the present invention is to provide a caster structure that prevents the generation of noise by hitting a vertical axis made of iron and a caster body made of iron.

In order to solve the above problems, according to the present invention, a caster structure including a caster body, a bush, a bearing, a vertical axis upper cover, a vertical axis, a T-shaped bush, a pad, and a nut,
The caster main body stores the bush and the bearing, and has a storage tank provided with a through hole in the center.
The bush is provided with a through hole in the center portion for penetrating the bearing,
The T-shaped bush is provided with a through hole in the center portion through which the longitudinal axis penetrates,
The bush and the bearing are stored in the storage tank provided in the caster body, the top of the caster body is covered by the vertical axis upper cover, the through hole of the vertical axis upper cover, the passage of the bearing A hole, a through hole in the caster body, and a through hole in the T-shaped bush are provided through the lower portion of the vertical axis, and screwed into the pad with a nut through the threaded portion of the vertical axis. A caster structure is provided in which each component is movably connected.

  It is preferable that the bush is disposed between the bearing and the caster body, adjusts a distance between the bearing and the caster body, and closely contacts the bearing and the caster body.

  Preferably, the T-shaped bush is disposed between the vertical axis and the caster body, covers the vertical axis and the caster body, and increases the strength of the vertical axis and the caster body.

  By passing the lower part of the vertical axis through the vertical axis upper cover, the bearing, the caster body and the T-shaped bush, and increasing the distance from the vertical axis upper cover to the T-shaped bush. It is preferable to improve the load resistance of the bearing and the caster body and the load resistance against the side force of the vertical axis.

The caster structure of the present invention has the following effects (1) to (4).
(1) By combining parts with the lower part of the long vertical axis, it is possible to increase the load resistance against caster load and side force, and to extend the service life of the caster.
(2) By increasing the length of the lower part of the vertical axis, it is possible to increase the load resistance of the bearing and caster body, and the load resistance against the side force of the lower part of the vertical axis and the T-shaped bush can be increased. In addition to preventing the vertical axis from loosening and wobbling even after a period of use, the service life of the casters can be extended.
(3) A bush is arranged between a bearing made of iron and a caster body made of iron, and by adjusting the size of the bush, the bearing and the caster body are brought into close contact with each other, and the bearing made of iron and the caster made of iron are made. It is possible to prevent noise from hitting the main body.
(4) A T-shaped bush arranged between the vertical axis made of iron and the caster body made of iron covers the lower end of the caster body and the vertical axis to increase the strength of the vertical axis and the caster body, and from the iron. It can be prevented that the vertical axis and the caster body made of iron hit each other to generate noise.

It is a perspective view which shows the caster structure by one Embodiment of this invention. It is a disassembled perspective view which shows the caster structure by one Embodiment of this invention. It is sectional drawing which shows the caster structure by one Embodiment of this invention. It is a perspective view which shows the caster structure by other embodiment of this invention. It is a disassembled perspective view which shows the caster structure by other embodiment of this invention. It is sectional drawing which shows the caster structure by other embodiment of this invention. It is sectional drawing which shows the conventional caster structure.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited thereby.

  First, reference will be made to FIGS. 1 to 3, a caster 2 according to an embodiment of the present invention includes a caster body 20, a bush 21, a bearing 22, a vertical axis upper cover 23, a vertical axis 24, a T-shaped bush 25, a pad 26, and Includes a nut 27. The caster body 20 is made of iron, and a storage tank 201 used for storing the bush 21 and the bearing 22 is provided on a side top portion to which the vertical axis 24 is connected. A through hole 203 is provided at the center of the storage tank 201. The bush 21 is provided with a through hole 210 penetrating the bearing 22 in the center, and is disposed between the caster body 20 and the bearing 22. When the caster body 20 made of iron and the bearing 22 are connected, the bush 21 has a gap. It has a function to adjust the noise and prevent the generation of noise. The bearing 22 is provided with a through hole 220 penetrating the longitudinal axis 24 in the center. The vertical axis upper cover 23 is made of iron, and a through hole 230 penetrating the vertical axis 24 is provided at the center. The vertical axis 24 includes a screw part 240, a contact part 241, a lower part 242 and a screwing part 243. The T-shaped bush 25 has a T-shaped receiving shape, and a through hole 250 penetrating the lower portion 242 of the vertical axis 24 is provided at the center, and the lower portion 242 of the vertical axis 24 and the lower portion of the caster body 20 are provided. By covering, the strength of the lower part 242 of the vertical axis 24 and the lower part of the caster body 20 can be increased, and the vertical axis 24 made of iron and the caster body 20 made of iron can be prevented from hitting each other to generate noise. . When the bush 21 and the bearing 22 are stored in the storage tank 201 provided in the caster body 20, the bush 21 is positioned between the caster body 20 and the bearing 22. A vertical axis upper cover 23 is fitted to the top of the caster body 20. After the lower portion 242 of the vertical axis 24 passes through the through hole 230 of the vertical axis upper cover 23, the through hole 220 of the bearing 22, the through hole 203 of the caster body 20, and the through hole 250 of the T-shaped bush 25, the pad 26 When the nut 27 is screwed through the threaded portion 243 of the vertical axis 24, each component is movably connected to the caster body 20.

  Please refer to FIG. As shown in FIG. 3, in the caster structure according to the embodiment of the present invention, when a load is applied to the caster 2 attached to the chair, the load is applied to the bearing 22 and the caster body 20. Since the lower portion 242 of the vertical axis 24 is long, the distance from the vertical axis upper cover 23 to the T-shaped bush 25 also increases accordingly, and the load resistance of the bearing 22 and the caster body 20 can be improved. Further, when the caster 2 moves while rotating, the load resistance against the side force of the lower portion 242 of the vertical axis 24 and the T-shaped bush 25 increases the distance from the vertical axis upper cover 23 to the T-shaped bush 25. Therefore, the caster 2 can be prevented from being damaged.

  Reference is made to FIGS. As shown in FIGS. 4 to 6, in the caster structure according to another embodiment of the present invention, a caster body 20a made of plastic is used instead of the caster body 20 made of iron, and the vertical upper cover 23 made of iron is used instead. In addition, a vertical axis upper cover 23a made of plastic is used. The caster body 20 a has a bearing storage tank 204. A through hole 205 is provided at the center of the bearing storage tank 204. The vertical axis upper cover 23a is provided with a hexagonal groove 231 on the top surface for accommodating the contact portion 241 of the vertical axis 24. A through hole 230 a that penetrates the lower portion 242 of the vertical axis 24 is provided at the center of the hexagonal groove 231. After the bearing 22 is stored in the bearing storage tank 204 of the caster body 20a, the vertical axis upper cover 23a is fitted to the top of the caster body 20. The lower portion 242 of the vertical axis 24 is penetrated through the through hole 230a of the vertical axis upper cover 23a, the through hole 220 of the bearing 22 and the through hole 205 of the caster body 20a, and the threaded portion 243 of the vertical axis 24 is penetrated through the pad 26. When installed, the parts 27 are movably connected to the caster body 20a by screwing with the nuts 27.

  Please refer to FIG. As shown in FIG. 6, in a caster structure according to another embodiment of the present invention, when a load is applied to the caster 2a attached to the chair, the load is applied to the bearing 22 and the caster body 20a. Since the lower portion 242 of the vertical axis 24 is long, the distance from the vertical axis upper cover 23a to the bottom surface of the caster body 20a also increases accordingly, and the load resistance of the bearing 22 and the caster body 20a can be improved. Further, when the caster 2a moves while rotating, the load resistance against the lower portion 242 of the vertical axis 24 and the side force of the caster body 20a is increased because the distance from the upper cover 23a of the vertical axis to the bottom surface of the caster body 20a is increased. . Thereby, it is possible to prevent the casters 2a from being damaged.

  Although the preferred embodiments of the present invention have been disclosed as described above, these are not intended to limit the present invention in any way. Various changes and modifications can be made without departing from the spirit and scope of the present invention. Accordingly, the scope of the utility model registration claim of the present invention should be broadly interpreted including such changes and modifications.

1 caster 2 caster 2a caster 10 caster body 11 shaft rod 12 lower cover 13 rotating member 14 rotating member 20 caster body 20a caster body 21 bush 22 bearing 23 vertical axis upper cover 23a vertical axis upper cover 24 vertical axis 25 T-shaped bush 26 Pad 27 Nut 110 Upper cover 201 Storage tank 203 Through hole 204 Bearing storage tank 205 Through hole 210 Through hole 220 Through hole 230 Through hole 230a Through hole 231 Hexagonal groove 240 Screw part 241 Contact part 242 Lower part 243 Screwing part 250 Through hole

Claims (4)

A caster structure comprising a caster body, a bush, a bearing, a vertical axis upper cover, a vertical axis, a T-shaped bush, a pad and a nut,
The caster main body stores the bush and the bearing, and has a storage tank provided with a through hole in the center.
The bush is provided with a through hole in the center portion for penetrating the bearing,
The T-shaped bush is provided with a through hole in the center portion through which the longitudinal axis penetrates,
The bush and the bearing are stored in the storage tank provided in the caster body, the top of the caster body is covered by the vertical axis upper cover, the through hole of the vertical axis upper cover, the passage of the bearing A hole, a through hole in the caster body, and a through hole in the T-shaped bush are provided through the lower portion of the vertical axis, and screwed into the pad with a nut through the threaded portion of the vertical axis. A caster structure characterized in that each component is movably connected.   The said bush is arrange | positioned between the said bearing and the said caster main body, adjusts the space | interval of the said bearing and the said caster main body, and adhere | attaches the said bearing and the said caster main body. Caster structure.   The T-shaped bush is disposed between the longitudinal axis and the caster body, covers the longitudinal axis and the caster body, and increases the strength of the longitudinal axis and the caster body. The caster structure described in 1. By passing the lower part of the vertical axis through the vertical axis upper cover, the bearing, the caster body and the T-shaped bush, and increasing the distance from the vertical axis upper cover to the T-shaped bush. The caster structure according to claim 1, wherein the load resistance of the bearing and the caster main body and the load resistance against the side force of the longitudinal axis are enhanced.

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