JPH0416721Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to casters suitable for attachment to support stands for OA equipment, other workbenches, etc. (hereinafter referred to as "vessel bodies").

(Prior Art) Conventionally, in a caster with wheels, the caster can be raised and lowered with respect to the lower end surface of the wheel by operating a rotary operation section provided on a threaded shaft of the caster for attaching the caster to a container body. Several types of seats are known in which floor-contact seats are connected directly or via seat support members.

(Problems to be Solved by the Invention) However, the above-mentioned known casters generally have a complicated structure, and the manufacturing, processing, and assembly of each part thereof requires time and effort, resulting in high costs. Moreover, the connection of the seat body or the seat support member body to the screw shaft is by a screwing means, and the seat body or the seat body support member is provided with a spiral portion for being rotatably screwed to the screw shaft. However, when the seat comes into contact with the floor, a load is applied directly to the threaded joint, so the threaded joint can be improved by using a metal having the required strength as the seat or seat support member. It is necessary to measure the strength of the parts, and it is generally inappropriate to use materials other than metals, such as synthetic resins.

The purpose of this invention is to have a simple structure while having the same function as the known caster, and to avoid using the threaded connection means for the screw shaft for raising and lowering the seat, so that it can support the seat or the seat. To provide a caster in which synthetic resin can be used as a member and there is no risk of failure or damage even if a considerably large load is applied to the seat body.

(Means for Solving the Problems) As shown in the drawing, this invention for achieving the above object includes a caster body 1, a wheel 2 supported by the body 1, and a wheel rotatable on the upper surface of the body 1. and a mounting plate 5 that is irremovably provided, a shaft portion 6 of the main body 1 on which the mounting plate 5 is located, a screw shaft 3 located at the center of these parts that penetrates the mounting plate 5, and a rotation operation portion 8.
The caster is assumed to have a seat plate 4 which is positioned above and below the lower end surface of the wheel 2 by means of a threaded shaft 3 provided with a screw shaft 3 and is brought into contact with the floor surface.

In this invention, in the configuration based on the above premise, the rotation operation part 8 has a rectangular shape and is provided at the lower end of the screw shaft 3 exposed from the lower surface of the main body 1. Seat board 4
The screw 12 is screwed in through a sliding washer 11 whose upper surface is slidably in contact with the lower surface of the rotation operation part 8 and which slides into a stepped concave surface 10a of a stepped hole 10 provided in the seat plate 4. In addition, an upright portion 13 provided opposite to one side of the seat plate 4 is inserted and supported in guide grooves 14 provided vertically on both sides of the main body 1 so as to be vertically slidable. .

(Example) The caster according to the invention will be further explained based on the illustrated example as follows.

As shown in Figures 1 and 2, the caster is
The basic structure includes a main body 1, wheels 2, a screw shaft 3, a seat plate 4, and a mounting plate 5.

The main body 1 has a stepped shaft portion 6 protruding from one side of the upper surface, and the shaft portion 6 includes a lower large diameter portion 6a and an upper small diameter portion 6.
It consists of b. The wheel 2 is supported by a shaft 7 on the other side of the main body 1. The screw shaft 3 has a rotation operation part 8 having a square diameter shape and a smooth lower end surface at the lower end, and a screw hole 9 passing through the shaft part 6 in the vertical direction at the center thereof.
is screwed into. The upper surface of the seat plate 4 is slidably brought into contact with the lower surface of the rotary operating portion 8, and the screw 12 is inserted into the rotary operating portion 8 via a sliding washer 11 that slides in contact with the stepped concave surface 10a of the stepped hole 10. The main body 1 is screwed into the main body 1, and has an upright portion 13 provided facing each other on one side, which is inserted and supported in grooves 14 provided vertically on both sides of the main body 1 so as to be vertically slidable. The mounting plate 5 has a sliding hole 15 in the center from which the outer periphery of the lower end protrudes, and a concave surface 16 around the sliding hole 15.
It has a screw 17 on the outer periphery, the lower large diameter part 6a is slidably fitted into the sliding hole 15, and the concave surface 1
The stop plate 18 is slidably fitted into the main body 1, and the inner circumferential edge of the stop plate 18 is fixed to the upper small diameter portion 6b, so that the stop plate 18 is attached to the main body 1 in a non-removable manner.

In the caster according to the invention having the above-mentioned configuration, the mounting plate 5 is attached to the vessel body or its supporting leg end by screwing screws through the screw holes 17. In this case, it goes without saying that a hole of a required length to allow the screw shaft 3 to enter is provided in the body or the supporting leg. Normally, in this installed state, as shown in FIG. 3, the screw shaft 3 is positioned near the highest point, and the seat plate 4 follows it.
is located at a higher position than the floor surface with which the wheels 2 come into contact along the grooves 14 that guide the upright portions 13. Therefore, like conventional casters, the wheels 2 can be rotated around the shaft 6 of the main body 1 to freely rotate according to the moving direction of the container, and to move the container to a desired position. can be moved to.

When fixing and installing the device in this moving position, grasp the rotation operation part 8 of the screw shaft 3 with your fingertips, or engage the rotation operation part 8 with a rotation operation tool such as a sparner. By rotating the screw shaft 3
By letting out the seat plate 4 downward and contacting the seat plate 4 following this with the floor surface, and further rotating the seat plate 4, the seat plate 4 is lowered from the lower end surface of the wheel 2, as shown in FIG. let As a result, the wheels 2 move upward away from the floor and the seat plate 4 is fixed to the floor. In this case, it goes without saying that the leg height can be adjusted by adjusting the extension length of the screw shaft 3.

In addition, in the embodiment, the screw shaft 3 is connected to the main body 1.
Although a configuration is shown in which the nut is screwed into the screw hole, a nut may be fixed in the entry hole of the screw shaft 3 provided in the vessel body or the support leg, and the nut may be screwed into the nut.

(Effect of the invention) In the caster according to this invention, a rotation operation part is provided on the lower end surface of the screw shaft, and the upper surface of the seat body is slidably brought into contact with the lower surface of the rotation operation part. At the same time, a screw is screwed in through a sliding washer that slides into the stepped concave surface of the stepped hole provided in the seat plate, and an upstanding part provided opposite to one side of the seat plate is provided in the vertical direction on both sides of the main body. Since it is supported by being vertically slidably inserted into the guide groove, when the seat body comes into contact with the floor surface, the rotary operation part simply overlaps the seat body in a flat state. Even if a load is applied and the load is quite large, the joint between the screw shaft and the seat body will not malfunction or be damaged. For this reason, even if a material other than metal, such as synthetic resin, is used for the seat, no problem will arise in terms of strength.

Moreover, since the screw shaft and the seat body have the above-mentioned relationship, compared to the known caster mentioned above,
The number of each part is small, the manufacture, processing, assembly, and overall structure of each part are simple, and it can be provided at a low price.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of a caster according to this invention. FIG. 2 is a partially cutaway side view of the caster. FIG. 3 is a side view of the caster seat body in a raised position. FIG. 4 is a side view of the seat plate in the lowered position. 1...Body, 2...Wheel, 3...Screw shaft, 4...
...Seat plate, 5...Mounting plate, 8...Rotation operation section, 10
... Stepped hole, 10a ... Stepped concave surface, 11 ... Sliding washer, 13 ... Standing part, 14 ... Guide groove.

Claims (1)

[Claims for Utility Model Registration] A caster main body 1, a wheel 2 supported by the main body 1, a mounting plate 5 rotatably but non-removably provided on the upper surface of the main body 1, and a vehicle on which the mounting plate 5 is located. A threaded shaft 3 located at the center of the shaft 6 of the main body 1 and the mounting plate 5, and a threaded shaft 3 provided with a rotation operation part 8 are used to rotate the upper and lower parts of the wheel 2 with reference to the lower end surface thereof. In the caster equipped with a seat plate 4 that is positioned at the bottom and in contact with the floor surface, the rotation operation part 8 has a square shape and is provided at the lower end of the screw shaft 3 exposed from the lower surface of the main body 1. , the upper surface of the seat plate 4 is in rotatable contact with the lower surface of the rotation operation part 8, and the stepped hole 1 provided in the seat plate 4
A sliding washer 1 slidingly contacts the stepped concave surface 10a of
At the same time, the screw 12 is screwed in through the screw 1, and the upright portion 13 provided opposite to one side of the seat plate 4 is vertically slidably inserted into the guide groove 14 provided in the vertical direction on both sides of the main body 1. The caster is supported.