JPH0550805A - Caster - Google Patents

Abstract

PURPOSE:To provide a caster whose specific caster main body can be suited designwise to leg portions of various shapes and in addition, which can support stably the load of a leg portion, by providing an outer furnishing member that can be put on the support shaft pipe of the caster main body. CONSTITUTION:This caster consists of a caster main body 2 that is made up by supporting pivotally a wheel 6 and being projectingly provided with a support shaft pipe 1 upward, a support shaft pipe outer furnishing member 3 that processes a through-hole 8 to put on the support shaft pipe 1 and whose lower surface is curved to fit the outer peripheral surface of the caster main body 2 around the support shaft pipe base portion and a support shaft 4 which is a rod body and at whose middle appropriate place is provided an engage- stopping ring 14 the lower portion of which is made to be an insertion shaft portion 15 into the support shaft pipe and the upper portion of which is made as a fixation portion 16 at a leg portion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention allows a particular caster main body to be designed in conformity with leg portions of various shapes by providing an exterior member which can be externally fitted to a support shaft cylinder of the caster main body. The present invention relates to a caster capable of stably supporting the load of legs.

[0002]

2. Description of the Related Art In a conventional caster, wheels are pivotally supported on both sides of a partition wall of a caster body composed of a partition wall and a cover integrally provided with the partition wall. A support shaft cylinder for receiving the support shaft protruding from is integrally molded. When using the caster, it is necessary to select a caster that matches the shape of the leg, and for this reason, it is necessary to prepare various casters corresponding to the type of the shape of the leg.

[0003]

However, in order to prepare casters of various shapes as described above, it is necessary to have a large number of molds and stocks for the production thereof, which causes a cost increase and is a problem. In order to fit a small number of casters to the legs of various chair shapes, the spindle cylinder is integrally molded with the caster body, so the design process of the tip of the legs and the spindle cylinder part is not uniform and unbalanced. Further, there is a problem that the retaining ring of the support shaft is exposed on the upper end surface of the support shaft cylinder and is unaesthetic in appearance. SUMMARY OF THE INVENTION The present invention has been made in view of such conventional problems and solves them.

[0004]

In order to achieve the object of the present invention, the present invention provides a caster body having a wheel pivotally supported and a support cylinder protruding upward, and an external fitting on the support cylinder. The lower surface of the support ring has a through hole and a lower surface of the support ring is provided to the support cylinder with a support ring exterior member having a lower surface of the support base of the caster body and an outer peripheral surface of the support base. It is intended to provide a caster having a shaft as an insertion shaft part and a top part as a fixing part to the leg part.

[0005]

As described above, in the caster according to the present invention, the supporting shaft cylinder exterior member that can be externally fitted to the supporting shaft cylinder projecting upward from the caster body is attached, and the supporting shaft cylinder is projectingly provided on the lower surface of the leg end of the chair or the like. The support shaft is received by the support shaft cylinder of the caster body, and the locking ring formed in the middle is received by the upper surface of the support shaft cylinder outer member, so that the load from the legs is passed through the support shaft cylinder outer member. The external appearance of both members can be achieved by simply transmitting the caster main body to the caster body and appropriately selecting the spindle outer casing member according to the shape of the leg tip.

[0006]

The details of the present invention will be described with reference to the illustrated embodiments. As shown in FIG. 1, the caster according to the present invention comprises a caster body 2 having a spindle cylinder 1 protruding therefrom, an exterior member 3 and a spindle 4.

The caster body 2 has a partition wall 5 as shown in FIG.
Wheels 6, 6 are pivotally supported on both sides of the shaft 6, a cover 7 is integrally or separately covered on the upper end surface of the shaft 6, and a spindle cylinder 1 is provided above the caster body 2.

In order to provide a through hole 8 for external fitting with the support cylinder 1 of the caster body 2, the support cylinder exterior member 3 is provided with a cylinder portion 9 at the center thereof and ribs. It is provided integrally with the cylindrical outer wall member 11 via 10 and the lower surface thereof has the shape of the support cylinder 1 base outer peripheral surface 12 of the caster body 2, for example, a rounded shape. Here, the upper end edge of the central tube portion 9 is set to a height slightly higher than the upper end edge of the support tube 1 when the tube portion 9 is fitted onto the support tube 1, and the outer wall member
11 The upper end edge is set higher than the upper end edge of the tubular portion 9 so that the engaging ring can be covered when a later-described engaging ring is placed on the tubular portion 9. Further, as the spindle outer casing member 3, a flat circular member as shown in the drawing can be adopted, but a member having various design considerations such as a square shape according to the tip shape of the leg can also be adopted.

Next, reference numeral 4 in the drawing denotes a leg portion 13 and a caster body 2.
Is a support shaft for pivotally attaching and, and a lock ring 14 is provided at an appropriate position in the middle of the rod body, and a shaft body below the lock ring 14 is fitted with the support cylinder exterior member 3 to support shaft cylinder 1 An insertion shaft portion 15 to be inserted therein is provided, and an upper portion of the locking ring 14 is provided with a male screw or the like to be a fixing portion 16 to the leg portion 13.

As shown in the figure, a screw hole 17 is formed in the lower surface of the tip of the leg 13 of the chair or the like as shown by a broken line in the figure, so that, for example, a spring washer 18 is interposed to allow the support shaft 4 to move. If the fixing portion 16 is screwed in, the support shaft 4 can be projected on the lower surface of the leg portion 13, and the insertion shaft portion 15 is inserted into the support shaft cylinder 1 of the caster body 2 to which the support shaft cylinder exterior member 3 is fitted, By mounting the locking ring 14 on the upper edge of the tubular portion 9 of the exterior member 3, the caster can be pivotally attached to the lower surface of the leg portion 13, and the load of the leg portion 13 must not be transmitted to the caster body 2 via the exterior member 3. Therefore, it is possible to rotate and float.

At this time, even if the shape of the tip of the leg portion 13 and the shape of the caster body 2 do not match in design, by considering the shape of the support cylinder exterior member 3 as an intermediate intervening member, It is possible to achieve mutual design unity. For example, when the tip end of the leg portion 13 has a semicircular shape as shown in FIG. 5, the spindle outer casing member 3 having the outer peripheral surface 12 matching the tip end flat shape is separately molded with synthetic resin for use. Then, whatever shape the caster body 2 has, it is possible to adapt it to the chair leg.

A locking ring 14 formed in the middle of the support shaft 4
Since the load transmitted by is applied to the upper end edge of the spindle outer sheath member 3, particularly the upper end edge of the tubular portion 9 forming the through hole 8,
The support shaft exterior member 3 can stably transmit the load onto the cover 7 of the caster body 2 while the lower surface of the support shaft exterior member 3 has a shape matching the surface of the cover 7. Since the abutment states of the surfaces are given to each other, the rotation of the support cylinder exterior member 3 is also prevented, and the rotation of the caster body 2 with respect to the legs 13 around the support shaft 4 is stable and easy. It is something to do.

Further, as in the above-mentioned embodiment, the outer wall member 11 of the support cylinder outer casing member 3 has a cylindrical portion 9 for forming the through hole 8 in which the upper end edge is formed.
When located above the upper edge, the lock ring 14 of the support shaft 4 is hidden by the outer peripheral member, and the lock ring 14 can be seen on the support cylinder 1 from the outside like a conventional caster. It will disappear.

[0014]

As described above, in the caster according to the present invention, the support cylinder outer member is externally fitted to the support cylinder of the caster main body, and the caster main body is attached to the leg portion of the chair or the like by the support shaft. By creating various shapes of spindle tube exterior members for each leg design, the caster body can be used as a common component and the leg tip shape, especially the leg By unifying the planar shape of and the planar shape of the support cylinder exterior member, a preferable design can be obtained, and the support shaft can be attached to the lower end of the leg portion in advance even in the assembled state.
It is easy to attach the caster body to the tip of the legs,
It can be adopted as a preferable one for a production line of chairs that are produced in large quantities. Further, the load from the legs is stably transmitted to the caster main body through the support shaft cylinder exterior member, so that the caster is less likely to malfunction and stable traveling is possible. Further, the support cylinder can be reinforced by the support cylinder outer member and the inclination of the support cylinder with respect to the support shaft can be prevented.

[Brief description of drawings]

FIG. 1 is a perspective view for explaining a caster according to the present invention.

FIG. 2 is an explanatory diagram showing an arrangement state of each component.

FIG. 3 is a vertical cross-sectional view of a support cylinder exterior member.

FIG. 4 is a plan view of a support cylinder exterior member.

FIG. 5 is an explanatory perspective view showing a state where the casters are attached to the tips of the legs.

[Explanation of symbols]

1 spindle cylinder 2 caster body 3 exterior member 4 spindle 5 partition wall 6 wheel 7 cover 8 through hole 9 tubular portion 10 rib 11 tubular outer wall member 12 outer peripheral surface 13 leg portion 14 locking ring 15 insertion shaft portion 16 fixed portion 17 Screw hole 18 Spring washer

Claims (1)

[Claims] 1. A caster body formed by pivotally supporting a wheel and having a support cylinder projecting upward, and a through hole that can be externally fitted to the support cylinder, and a lower surface is an outer peripheral surface of a support cylinder base of the caster body. A support cylinder outer member having a shape, and a support shaft having a locking ring provided at an intermediate position with a rod as a lower part of the locking ring to be an insertion shaft part to the support shaft cylinder and an upper part as a fixing part to a leg part. , A caster consisting of.