JPH0220081Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a caster that can be attached to an object to be attached using a single fastening member, and more specifically, a caster that can be attached to an object by any fastening member depending on the conditions of the object to be attached. The present invention relates to a caster that is devised so that the fastening member can be tightened in any direction.

Conventionally, there are several types of casters with different structures that can be attached to an object with a single fastening member, and two typical types will be explained as follows.

The first one consists of an annular upper corrugated ball receiving plate having an upper corrugated ball receiving portion, a lower corrugated ball receiving plate having an annular shape having a lower corrugated ball receiving portion, an inner annular portion of the lower corrugated ball receiving plate, and the upper corrugated ball receiving plate. A bolt-shaped fastening member integrally formed with a caulked part made by overlapping and caulking the inner annular part of the corrugated cardboard receiving plate, a ball receiving part at the upper end, and a wheel at the lower end, which can be rotated freely by the wheel mounting shaft. The attached wheel mounting body, the upper corrugated cardboard held by the upper corrugated ball receiving part of the upper corrugated ball receiving plate and the ball receiving part of the wheel mounting main body, the lower corrugated cardboard receiving part of the lower corrugated cardboard receiving plate and the above. It is formed from a lower corrugated board held by a ball receiving part of the wheel mounting body.

However, in such casters, the fastening member is fixed, and the length of the threaded part, the size of the thread diameter, the type of thread, the direction of thread installation, etc. cannot be changed at all depending on the conditions of the object to be mounted. First, if installation is not possible due to the conditions of the object to be installed, it is necessary to change to a new caster, and when using the caster, make sure that the type of caster is selected, the tightening direction is constant due to the crimping structure, and that you do not use a spanner, etc. Since the tightening space is limited, the workability is poor and it is inconvenient.
Many different types of products had to be prepared during production, and because of the caulking structure, they were not suitable for mass production and were expensive.

The second method is to separate the fastening member from the caster so that the type and tightening direction of the fastening member are arbitrary depending on the conditions of the object to be attached. A wheel mounting body having a ball receiving portion at its lower end and a wheel rotatably mounted on a wheel mounting shaft, held by the ball receiving portion of the wheel mounting body and the ball receiving portion of the ball receiving plate. It is formed from a ball that is

However, such a caster does not have a structure that can withstand heavy loads in terms of strength. In other words, the ball receiving part of the ball receiving plate has an annular shape, and the outer peripheral edge of the ball receiving plate is vertically downward. The ball receiving portion of the wheel mounting body is formed to curve inwardly after being bent, and the ball receiving portion of the wheel mounting body is formed to curve outward in a substantially vertical upward direction and facing the ball receiving portion of the ball receiving plate inwardly. Because the ball is held between the ball receiving parts of the wheels, when a heavy load is applied to the wheel, the load is applied in a horizontal direction to the ball. As a result, the ball receiving part of the ball receiving plate is moved outward,
The ball receiving portion of the wheel mounting body deforms inward, and has drawbacks such as rattling or the wheel mounting body falling off when subjected to strong impact.

These two typical types of casters are either inconvenient because they are integrally formed with the fastening member and are difficult to work with both during use and manufacturing, or they are extremely vulnerable to shocks and heavy loads and are unsuitable for practical use. It was too small.

The present invention has been made to eliminate such drawbacks.

That is, the first object of the present invention is to provide a caster that can be easily attached by selecting only the fastening member depending on the object to be attached, without selecting the shape or type of the object. The second purpose is to provide a highly practical caster that is strong against shocks and heavy loads, and does not break down over a long period of time.

Furthermore, a third object of the present invention is to provide a caster that can be easily used with tools such as a hexagonal wrench, adjustable spanner, screwdriver, etc., and that improves workability even when it is attached from the wheel side using a fastening member. Our goal is to provide the following.

In order to achieve the above-mentioned object, the structure of the present invention will be described as follows: an upper corrugated board receiving part whose one end is formed to be in contact with the object to be attached; A ball receiving plate integrally formed with a cylindrical part formed by a cylindrical part and a supporting part of a fastening member formed by bending outward continuously from the cylindrical part, having a ball receiving part at an upper end part and a lower end part. a wheel mounting body on which a wheel is rotatably mounted on a wheel mounting shaft such that the outer peripheral part of the wheel is outside a downward extension of the inner peripheral edge of a cylindrical part formed on the ball receiving plate, and the ball This caster is characterized in that it is formed from an upper corrugated ball held by an upper corrugated ball receiving portion of the receiving plate and a ball receiving portion of the wheel mounting body.

In the above configuration, the fastening member can be formed by a bolt.

Further, in the above configuration, the fastening member can be formed from a bolt and a nut.

An embodiment of the caster of this invention will be described below with reference to the drawings.

FIG. 3 shows an embodiment of the present invention,
The ball receiving plate 1 is formed from an upper corrugated ball receiving part 2, a cylindrical part 3, a supporting part 4, and a lower corrugated ball receiving part 5.

The cylindrical portion 3 is formed continuously and inwardly and downwardly from the upper corrugated board receiving portion 2 .

The support portion 4 is formed by being bent outward continuously from the cylindrical portion 3.

The lower corrugated board receiving portion 5 is formed by curving the supporting portion 4 upward.

9 is a wheel mounting body;
has a ball receiving portion 6 formed to curve upward at its upper end, and a wheel 7 is rotatably attached to its lower end by a wheel mounting shaft 8.

10 is an upper corrugated board, and the upper corrugated board 10
is held by the upper corrugated ball receiving portion 2 of the ball receiving plate 1 and the ball receiving portion 6 of the wheel mounting body 9.

11 is a lower corrugated board, and the lower corrugated board 11
is held by the lower corrugated ball receiving portion 5 of the ball receiving plate 1 and the ball receiving portion 6 of the wheel mounting body 9.

Reference numeral 12 denotes a fastening member, and the fastening member 12 holds a bolt inserted from below the cylindrical portion 3 and an attached object 14 placed above the upper corrugated ball receiving portion 2 of the ball receiving plate 1. It is formed by a tightening nut.

Depending on the conditions of the object 14 to be attached, this fastening member 12 may be configured such that a bolt is inserted from above and tightened with a nut from below, or a screw hole is provided in the object 14 to be attached and the screw hole is inserted. Optionally, it may be tightened from below using matching bolts.

Also, the wheel 7 attached to the wheel attachment body 9
is formed so that its outer circumferential portion 13 is located outside the downward extension of the inner circumferential edge of the cylindrical portion 3.

According to the caster of the present invention constructed as described above, the upper corrugated ball receiving part, the cylindrical part, the support part, and the lower corrugated ball receiving part are integrally formed to constitute the ball receiving plate, so that it can withstand heavy loads. The wheel mounting body does not deform even when exposed to shocks, and there is no chance of the wheel mounting body falling off due to impact, etc., and any fastening member can be selected depending on the conditions of the object to be mounted. The tightening direction can be arbitrary, which eliminates inconvenience during use, and also enables mass production of small quantities during manufacturing, improving work efficiency.

In another embodiment of the caster of the present invention shown in FIG. 2, 15 is a ball receiving plate, and the ball receiving plate 15 is formed of an upper corrugated ball receiving part 16, a cylindrical part 17, and a support part 18. There is.

The cylindrical portion 17 is formed continuously and inwardly and downwardly from the upper corrugated board receiving portion 16 .

The support portion 18 is formed by being bent outward continuously from the cylindrical portion 17 .

20 is a wheel mounting body, and the wheel mounting body 2
0 has a ball receiving portion 19 formed to curve upward at its upper end, and a wheel (not shown) is rotatably attached to its lower end.

21 is an upper corrugated board;
is held by the upper corrugated ball receiving portion 16 of the ball receiving plate 15 and the ball receiving portion 19 of the wheel mounting body 20.

22 is a fastening member, and the fastening member 22 fastens the bolt inserted from below the cylindrical portion 17 and the object 23 placed above the upper corrugated ball receiving portion 16 of the ball receiving plate 15. It is formed by nuts.

As explained above, the present invention consists of forming a ball receiving plate by integrally forming the upper corrugated ball receiving part, the cylindrical part, and the supporting part, and that the upper corrugated ball receiving part and the ball receiving part are vertically opposed to each other. Due to its shape, the structure is simple, the number of parts is small, the assembly workability is improved, and it can be manufactured at low cost. This has the advantage that fastening members can be selectively replaced and easily installed depending on the conditions.

In particular, in the present invention, the outer peripheral part of the wheel attached to the wheel mounting body is formed to be outside the downward extension line of the inner peripheral edge of the cylindrical part formed on the ball receiving plate. Even when it is attached from the wheel side using a fastening member, various tools can be easily used without the wheel getting in the way, and workability can be improved.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of a caster according to the present invention, and is a longitudinal sectional view showing a state in which the caster is attached to an object. FIG. 2 similarly shows another embodiment of the present invention, and is a longitudinal sectional view of the main part showing a state where it is attached to an object. In the drawing, 1 and 15 are ball receiving plates, 2 and 1
6 is an upper cardboard receiving part, 3, 17 is a cylindrical part, 4, 1
8 is a support part, 5 is a lower ball receiving part, 6, 19 is a ball receiving part, 7 is a wheel, 8 is a wheel mounting shaft, 9, 20
is the wheel mounting body, 10, 21 is the upper cardboard, 11
12 and 22 are fastening members, 13 is an outer peripheral portion, and 14 and 23 are objects to be attached.

Claims (1)

[Scope of utility model registration request] An upper corrugated board receiving part formed so that one end becomes a contact part with the object to be attached, a cylindrical part formed continuously from the inside downward from the upper corrugated board receiving part, and a cylindrical part continuously formed from the cylindrical part to the outside. A ball receiving plate integrally formed with a support portion of a bent fastening member, and a cylindrical portion having a ball receiving portion at an upper end and an outer peripheral portion of a wheel at a lower end formed on the ball receiving plate. A wheel mounting body on which a wheel is rotatably mounted on a wheel mounting shaft so as to be outside the downward extension line of the inner peripheral edge, and an upper corrugated ball receiving part of the ball receiving plate and a ball receiving part of the wheel mounting main body. A caster characterized by being formed from an upper corrugated board that is held by twisting.