JPH0423041Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to casters that are attached to the bottom or legs of furniture such as audio racks.

First, the applicant has developed a system that can smoothly dissipate the frictional heat generated between a pair of wheels and the bearing body that rotatably holds them, even when the wheels are moved over a long distance, thereby reducing wear and tear on the wheel spindles, etc. For the purpose of preventing the occurrence of this problem, a caster disclosed in Japanese Utility Model Application No. 60-13802 was disclosed. This caster consists of a pair of vertical wheels, each with a spindle protruding from the center of the inner surface of a pair of disc-shaped bodies, which are made by bending a metal plate into a concave shape and erecting them on both sides of the bottom wall. The bearing body has a cylinder body facing outward at the edge of the shaft hole in the wall.The support shaft is inserted into the cylinder body and installed, and the upper edge of the bearing body and the upper halves of the pair of wheels are removed. A pair of free end-shaped protrusions provided on the lower surface of the cover to be covered are joined to both outer sides of the upper edge of the opposite wall of the bearing body, and the lower end of the mounting shaft provided through the cover and the bearing body is A large diameter flange with an enlarged outer diameter is located on the outside of the lower surface of the bottom wall of the bearing body, and a large diameter flange with an enlarged outer diameter is also provided on the protrusion of the mounting shaft from the cover. It is attached by locking the flange part to the top surface of the cover.

By the way, the object of the present invention is to further improve the technique of the prior application and to make the attachment state of the bearing body and the cover in such a caster even stronger. In order to achieve these objectives, the present invention proposes a concave bearing body that independently rotatably holds a pair of wheels, and is attached to the bottom or leg of the furniture at the center of the side end opposite to the installation side of the shaft. An insert body facing upward is provided, and a support tube for inserting the insert body is provided on the lower surface of the cover between a pair of free-end shaped protrusions that join to both outer sides of the upper edge of the bearing. The gist is that an insertion space for at least the upper end edge of the bearing body is provided between the opposing side surfaces and the protrusion, and the lower part is opened.

The details of the caster according to the present invention will be further explained based on the attached drawings. Reference numeral 1 designates a bearing body, which is made by bending a metal plate into a concave shape, and has a bottom wall with a width, and a pair of opposing vertical walls 2, 2 spaced apart from each other on both sides, and an arcuate upper edge on one side. Each of the opposing walls 2 has a shaft hole 3 whose axes coincide with each other in the horizontal direction at the lower center in the longitudinal direction, and a cylinder facing outward in the horizontal direction at the edge of the shaft hole 3. The body 4 is integrally provided to increase the area for supporting the spindle of the wheel, which will be described later. Next, reference numeral 5 denotes a pair of wheels, in which a pipe-shaped support shaft 6 having a ring-shaped groove on the outer periphery of the tip protruding from the center of the inner surface of the disc-shaped main body is inserted from the outside of the bearing body 1. The bearing body is inserted into the shaft hole 3 through the body 4, and is mounted on both sides of the bearing body 1 with a space between the support shafts 6, 6 tip surfaces, and a concave groove extending between the opposing walls 2, 2. 1, the disc-shaped main body is formed in such a size that its outer circumferential surface is positioned closer to the shaft holes 3, 3 than the upper end edges of the opposing walls 2, 2 of the bearing body 1. 7 is a pair of wheels 5, 5 attached to the bearing body 1, and the wheels 5, 5 are installed in a construction manner between the support shafts 6, 6 by inserting their ends into the interior of the pipe-shaped support shafts 6, 6 facing each other with a gap between them. This is a metal pin that prevents the wheels 5, 5 from tilting, and also connects the pair of wheels 5, 5 so that they can rotate independently. Reference numeral 8 denotes a C-shaped member which is fixed between the opposing walls 2, 2 in a concave groove of the support shaft 6 of the wheel 5 inserted from the outside of the opposing walls 2, 2 of the bearing body 1 and protruding from the inner surface of the opposing wall 2. This is a washer that prevents the wheel 5 from being removed from the bearing body 1. 9
is the bearing body 1 in a state protruding above the pair of wheels 5, 5.
It is a semi-cylindrical cover made of synthetic resin provided around the outer periphery of the upper edge of the. Reference numeral 10 denotes an arcuate end of the upper edge of the bearing body 1 on the other side opposite to one side in order to prevent the opposing wall 2 of the bearing body 1 from tilting in the facing direction due to the load on the wheels 5, 5. From the vicinity of the upper edge to one side where the upper edge becomes an arcuate hole, at least this one side is opened up and down, and installed between each of the opposing walls 2, 2 with the surface flush with the upper edge of the bearing body 1. An attached spacer is fitted, a part of which is fitted into a recess formed in the upper edge of the opposing walls 2, 2, and is mounted on the opposing walls 2, 2 in an overlapping manner. A cover 9 is provided overlappingly on the upper surface side. 11 is on one side where the upper edge of the opposing wall 2 of the bearing body 1 is arcuate, on the other side of the bottom wall on the opposite side with the shaft hole 3 in between, and on the other side of the spacer 10 and the cover 9. A support hole is provided with the axes aligned in the vertical direction, and by inserting a mounting shaft shown as 12 in the figure into the support hole 11, the cover 9 can be held on the bearing body 1, and the bottom or legs of the furniture can be held. A mounting shaft 12 having a mounting portion 14 at its upper end is rotatably and non-removably mounted. That is, this mounting shaft 12
A large-diameter hole is made by penetrating the support hole 11 of the cover 9, the support hole 11 of the spacer 10, and the support hole 11 of the bottom wall of the bearing body 1, and expanding the outer diameter by caulking or the like after passing through the lower end. The flange portion is located outside the lower surface of the bottom wall of the bearing body 1, and a large diameter flange with an enlarged outer diameter is provided on the outer periphery of the protrusion of the mounting shaft 12 from the cover 9, shown as 13 in the figure. The cover 9 is prevented from coming off from the bearing body 1 by being engaged with the upper surface of the cover 9. This flange portion 13 may be integrated with the mounting shaft 12,
Also, it may be attached to the mounting shaft 12, such as a nut, or any other type. Further, reference numeral 14 denotes a mounting portion which is provided to protrude further upward from the flange portion 13 of the mounting shaft 12 which is fixed to the upper surface of the cover 9, and with this, the caster is mounted to the bottom or leg of the furniture. The mounting portion 14 may be inserted into a screw hole provided in the bottom or leg of furniture like the screw shaft shown in this embodiment, or may be formed into a plate shape or the like. Reference numeral 15 denotes a pair of vertically facing side surfaces at the center of the side end of the bottom wall of the bearing body 1 opposite to the mounting shaft 12 side, that is, the side end of the side where the upper edge of the opposing wall 2 is arcuate. This is an insert that protrudes upwardly with a space between the opposing walls 2, 2, and in this embodiment, the side end of the bottom wall is bent upwards, as shown in FIG. It is also possible to install machine screws or pins upright against the bottom wall, as shown in FIG. Reference numeral 16 denotes a portion of the lower surface of the cover 9 where the upper end edge of the bearing body 1 between a pair of protrusions (to be described later) is arcuate, and faces at least the protrusions at a portion covering the upper and lower open portions of the spacer 10 on one side. Each opposing wall 2 of the bearing body 1 between the side surface and the protrusion,
2. A support cylinder is provided with an insertion space at the upper end edge, the axis is vertical, and the lower part is open.The insert body 15 is inserted into this, and the cover 9 is removed from the bearing body 1. A stop has been made.
The support tube 16 can also be formed with its upper side open. Reference numeral 17 denotes a pair of free end-shaped protrusions provided on the lower surface of the cover 9 at least in the area where the support tube 16 is provided, and are joined to both outer sides of the upper edge of the bearing body 1 to support the wheels 5 of the cover 9. This is to prevent movement in the axial direction.

In the illustrated embodiment, an insert 15 and a support cylinder 1 are also provided at the ends of the bearing body 1 and the cover 9 on the mounting shaft 12 side.
It is also possible to provide 6.

An insert body 15 protruding upward from the side end of the bearing body 1 is inserted into a support tube 16 provided at the end of the cover 9 of such a caster with its axis in the vertical direction. 1, and the axis of the support tube 16 and the protruding direction of the insert 15 are in the same direction, so attaching the cover 9 to the bearing 1 can be done by simply moving both linearly in the direction of each other. Very simple. And insert body 15
After the cover 9 is inserted into the support cylinder 16, the protrusions 17 of the cover 9 are joined to both outer sides of the upper edge of the bearing body 1, so that the end of the cover 9 may catch on other objects. Even when they are equal, they do not separate in either the axial direction of the wheel 5 or in the orthogonal direction. Because of this, the insert 15 and the support tube 16 and the bearing body 1 and the protrusion 17 engage with each other, so that the cover 9 can be firmly attached to the bearing body 1.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a caster according to the present invention, Fig. 2 is a longitudinal front view, Fig. 3 is a longitudinal side view, and Fig. 4 is an enlarged cross-section of the main part taken along line A-A in Fig. 2. 5 is a plan view showing the bearing body, FIG. 6 is a side view, and FIG. 7 is a longitudinal sectional front view showing another embodiment of the insert. 1... Bearing body, 2... Opposing wall, 3... Shaft hole, 4
...Cylinder, 5...Wheel, 6...Spindle, 7...Pin, 8...Washer, 9...Cover, 10...
Spacer, 11...Support hole, 12...Mounting shaft,
13...Flange part, 14...Mounting part, 15...
Insert body, 16...support tube, 17...projection.

Claims (1)

[Claims for Utility Model Registration] A bottom wall made by bending a metal plate into a concave shape and having a width. A pair of vertical opposing walls 2, 2 are spaced apart from each other on both sides, and the upper edge of one side is shaped like an arc. It was erected in
Each of the opposing walls 2, 2 has shaft holes 3, 3 whose axes coincide with each other in the horizontal direction at the lower center in the longitudinal direction thereof, and a cylinder 4 facing outward in the horizontal direction is provided at the edge of the shaft hole 3. An insert body 15 is integrally provided at the center of one end of the bottom wall and projects upward with a space between the vertically oriented side surface and the pair of opposing walls 2, 2. A bearing body 1 provided with a support hole 11 penetrating vertically on the opposite side of the bottom wall insert 15 and the shaft hole 3, and a support provided in the bearing body 1 at the upper edge of the bearing body 1. From the part overlapping with the hole 11 to the one side where the upper edge of the bearing body 1 is arcuate, at least this one side is opened up and down, and the surface between each opposing wall 2 is flush with the upper edge of the bearing body 1. A plate-shaped spacer 10 that is installed in a fixed state and has a support hole 11 vertically aligned with the support hole 11 provided in the bearing body 1, and an inner surface of a disc-shaped main body. A pipe-shaped support shaft 6 having a ring-shaped groove on the outer periphery of the tip protruding from the center is inserted into the cylindrical body 4 from the outside, and a space is formed between the support shafts 6, 6 tip surfaces on both sides of the bearing body 1. It is installed with a groove opened and a concave groove extending between the opposing walls 2, 2, and when it is installed on the bearing body 1, the disc-shaped main body extends from the upper edge of each opposing wall 2, 2 of the bearing body 1 on the outer periphery. A pair of wheels 5, 5 formed in a size relationship such that their surfaces are located on the side of the shaft holes 3, 3.
and, by inserting both ends of the pair of wheels 5, 5 attached to the bearing body 1 into the interior of supporting shafts 6, 6 facing each other with a gap between them, the pair of wheels 5, 5 are independently rotatably connected. The pin 7 and the C-shaped grooves of the support shaft 6 inserted from the outside of the opposing walls 2, 2 of the bearing body 1 and protruding toward the inner surface of the opposing walls 2 of the wheel 5 are fixed between the opposing walls 2, 2. A washer 8 in the shape of a washer 8 and a pair of protrusions 17, 17 in the form of free ends provided on its lower surface are joined to both outer sides of the upper end edges of each opposing wall 2, 2 of the bearing body 1, and a protrusion on the lower surface 1
At least between the side surface facing the protrusion 17 and the protrusion 17 at the part that covers the upper and lower open parts of the spacer 10 on one side where the upper end edge of the bearing body 1 between 7 and 17 has an arc shape. The insert body 15 of the bearing body 1 is inserted into a support cylinder 16 which is provided with an insertion space at the upper edge of each of the opposing walls 2, 2 of the bearing body 1, and whose axis is oriented in the vertical direction and whose lower part is open. The support hole 11 is attached to the outer periphery of the upper edge of the bearing body 1 in a state of protruding above the pair of wheels 5, 5, and the support hole 11 of the bearing body 1 is aligned with the support hole 11 of the spacer 10. A semi-cylindrical cover 9 made of synthetic resin is provided, and an outer diameter provided at the lower end passes through the support hole 11 of the cover 9, the support hole 11 of the spacer 10, and the support hole 11 of the bottom wall of the bearing body 1. A large diameter flange portion with an enlarged diameter is located outside the lower surface of the bottom wall of the bearing body 1, and a large diameter flange portion 13 with an enlarged outer diameter is provided on a protruding portion from the cover 9. A mounting part 14 is provided which is fixed to the upper surface of the cover 9 and protrudes further upward from the flange part 13 which is fixed to the upper surface of the cover 9 to attach to the bottom or leg of the furniture. Mounting shaft 12 freely mounted
And more casters.