JP3863734B2 - Casters - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a caster in which radial bearings are insert-molded into synthetic resin yokes or radial bearings are insert-molded into synthetic resin wheels so that the radial bearings can be easily separated.
[0002]
[Prior art]
Conventionally, in a synthetic resin caster, the radial bearing that serves as a bearing for the pivot shaft is fixed to the pivot shaft on the inner ring side and integrally fixed to the yoke made of synthetic resin on the outer ring side. The yoke was not easily disassembled and could not be separated.
Also, when using radial bearings as axle bearings, the inner ring side is fixed to the axle and the outer ring side is integrally fixed to the synthetic resin wheel body. Could not be easily decomposed and separated.
[0003]
[Problems to be solved by the invention]
The present invention was devised in view of the above circumstances, and the main problem is that the radial bearing is separated from the synthetic resin yoke or wheel body, which is the housing, so that the bearing and the synthetic resin material can be easily separated. It is an object of the present invention to provide a caster that can be separated.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, in the invention of claim 1,
In casters in which radial bearings that serve as pivot bearings are insert molded into synthetic resin yokes,
The yoke is formed with an opening having a size capable of taking out the radial bearing in the axial direction,
Provided on the edge of the opening of the yoke are a plurality of claws that project toward the opening and lock the radial bearing;
A technical measure is taken that the radial bearing can be removed from the opening and separated from the yoke by cutting the claw.
[0005]
In the invention of claim 2,
In casters made by insert molding radial bearings that support axles on synthetic resin wheels,
The wheel body is formed with an opening having a size capable of taking out the radial bearing in the axial direction,
Provided on the edge of the opening of the wheel body are a plurality of claws that project toward the opening and engage the radial bearing,
The technical means is taken that the radial bearing can be removed from the opening and separated from the wheel by cutting the claw.
[0006]
Furthermore, in the invention of claim 3,
In a caster formed by insert molding a first radial bearing serving as a bearing for a turning shaft into a synthetic resin yoke and a second radial bearing serving as a bearing for an axle on a synthetic resin wheel,
The yoke is formed with an opening having a size capable of taking out the first radial bearing in the axial direction,
The edge of the opening of the yoke is provided with a plurality of claws that project toward the opening and engage the first radial bearing, and the first radial bearing is removed from the opening by cutting the claws. Can be separated from the yoke,
The wheel body is formed with an opening having a size capable of taking out the second radial bearing in the axial direction,
The edge of the opening of the wheel body is provided with a plurality of claw portions that protrude toward the opening side to lock the second radial bearing, and the second radial bearing is removed from the opening by cutting the claw portions. The technical measures are taken that it can be removed and separated from the wheel.
[0007]
In the invention of claim 4,
A technical means is provided in which a plurality of the claw portions are provided at substantially equal intervals along the outer periphery of the opening and extend toward the center of the opening.
In the invention of claim 5,
A technical means is provided in which a thin portion is provided so that the claw portion can be easily folded at a midway position in the protruding direction.
DETAILED DESCRIPTION OF THE INVENTION
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of casters according to the present invention will be described in detail with reference to the drawings.
A caster 1 shown in FIG. 1 is formed by insert-molding a mounting plate 2 that is fixed to an attachment body (not shown), a pivot shaft 3 that is fixed to the mounting plate 2, and a first radial bearing 4 that supports the pivot shaft 3. It consists of a yoke 5 made of synthetic resin and a wheel 10 pivotally supported by the yoke 5.
[0009]
The yoke 5 is formed by insert-molding the radial bearing 4 in the middle of the upper turning portion 5a, and a concave portion 5b into which the washer 6 is fitted is formed in the lower portion.
The upper end of the pivot shaft 3 is fixed to the mounting plate 2 by riveting or the like, and the lower end of the pivot shaft 3 is fastened to the washer 6 through the hollow 4 a of the first radial bearing 4.
[0010]
The inner ring 41 of the first radial bearing 4 is fixed to the turning shaft 3, and the outer ring 42 is fixed to the yoke 5, and can turn around the turning shaft 3. In the figure, reference numeral 43 denotes a steel ball interposed between the inner ring 41 and the outer ring 42.
An opening 7 having a size capable of taking out the first radial bearing 4 in the axial direction is formed on the upper surface of the turning portion 5a of the yoke 5.
[0011]
A plurality of claw portions 8 projecting toward the opening portion 7 are provided on the edge portion of the opening portion 7 at the upper portion of the swivel portion 5a so as to be integrally formed. It is locked so as not to come off from the opening 7.
When the claw portion 8 is cut off with a nipper or the like, the opening portion 7 is completely opened, so that the built-in first radial bearing 4 can be detached from the turning portion 5a of the yoke 5 and separated.
[0012]
As shown in FIG. 3, a plurality of (eight in the illustrated example) the claw portions 8 are provided at appropriate intervals along the outer periphery of the opening 7.
And the through-hole S for inserting the front-end | tip of cutting tools, such as a nipper, is formed in the attachment plate 2. As shown in FIG.
In addition, it is preferable that the claw portion 8 is provided with a gap S ′ in part so that a cutting tool such as a nipper can be easily operated, and the claw portions 8 are arranged at substantially equal intervals in the others. Then, the arrangement and number of the claw portions 8 are not particularly limited.
Further, the claw portion 8 is provided with a thin-walled portion 9 that is constricted so as to be easily folded at a position slightly outside the periphery of the opening 7 at a midway position in the protruding direction, and into the opening 7 of the claw 8. The protruding part is easy to cut and fold.
In FIG. 1, the thin-walled portion 9 is formed by a groove cut out from the top of the claw portion 8 to a midway position. In FIG. 3, the thin-walled portion 9 has a shape in which both sides of the claw portion 8 are recessed.
[0013]
As a result, as shown in FIGS. 2 and 4, the claw portion 8 is cut out at a predetermined position, which is a thin portion 9 serving as a guide in this embodiment, and the tip of the claw portion 8 does not protrude into the opening portion 7. Thus, the opening 7 can be fully opened, the first radial bearing 4 can be removed from the yoke 5, and the bearing and the synthetic resin material can be separated.
[0014]
5 and 6 show different embodiments in which the present invention is applied to a wheel 10 in which a second radial bearing 14 is insert-molded in the center of a synthetic resin wheel body 11.
The wheel body 11 has a through-hole formed in the center and a second radial bearing 14 is insert-molded.
[0015]
That is, the wheel body 11 is formed with an opening 17 having a size that allows the second radial bearing 14 to be taken out in the axial direction.
A plurality of claw portions 18 projecting toward the opening 17 and locking the second radial bearing 14 are integrally formed at the edge of the opening 17 of the wheel body 11.
[0016]
Therefore, at the time of disposal, the tip of the claw portion 18 is cut off to remove the second radial bearing 14 from the opening 17 and separate the bearing 14 from the synthetic resin wheel 10 for separation processing.
In the illustrated example, the thin portion is not provided in the claw portion 18, but a thin portion that is easy to cut and may be provided in the middle position of the claw portion as in the above embodiment.
[0017]
In this case, a plurality (eight in the illustrated example) of the claw portions 18 are formed at equal intervals along the outer periphery of the opening portion 17, but the number and interval are not limited to the above embodiment.
Moreover, the shape of the nail | claw part is not limited to the said Example, In short, what protrudes so that an opening part may be block | closed and what can be excised should just be.
[0018]
In the caster according to the present invention, only the first radial bearing is provided in the yoke of the caster, or only the second radial bearing is used in the wheel, or the first radial bearing and the second radial bearing are provided in the yoke and the wheel, respectively. May be.
The shape of the radial bearing is not limited to the above embodiment, and may be another known shape.
In addition, it goes without saying that various design changes can be made without departing from the scope of the present invention.
[0019]
【The invention's effect】
As described above, in the caster according to the present invention, when the yoke or the wheel is made of a synthetic resin material, the claws are opened to open the opening, the metal radial bearing is removed, and the separation treatment is performed from the synthetic resin material. can do.
The claw portion that closes the opening can be integrally formed with a synthetic resin simultaneously with the yoke and the wheel body when the radial bearing is insert-molded.
Further, when the radial bearing is separated, the opening can be fully opened simply by cutting or folding the claw portion, and the radial bearing can be easily removed, which is very convenient.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an example of a caster.
FIG. 2 is a cross-sectional view of a main part in a state in which a tip of a claw is cut off.
FIG. 3 is a perspective view of a caster with a mounting plate and a pivot shaft omitted.
FIG. 4 is a perspective view of a state in which a claw portion is folded.
FIG. 5 is a side view showing an embodiment when a radial bearing is insert-molded on a wheel.
6 is a cross-sectional view of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Caster 2 ... Mounting plate 3 ... Turning axis 4 ... Radial bearing 5 ... Yoke 5a .. Turning part 5b .. Recessed part 6 ... Washer 7 ... Opening part 8. .... Claw part 9 ... Thin part 10 ... Wheel 11 ... Wheel body 14 ... Radial bearing 17 ... Opening part 18 ... Claw part

Claims (5)

In casters in which radial bearings that serve as pivot bearings are insert molded into synthetic resin yokes,
The yoke is formed with an opening having a size capable of taking out the radial bearing in the axial direction,
Provided on the edge of the opening of the yoke are a plurality of claws that project toward the opening and lock the radial bearing;
A caster characterized in that a radial bearing can be removed from the opening and separated from the yoke by cutting the claw. In casters made by insert molding radial bearings that support axles on synthetic resin wheels,
The wheel body is formed with an opening having a size capable of taking out the radial bearing in the axial direction,
Provided on the edge of the opening of the wheel body are a plurality of claws that project toward the opening and engage the radial bearing,
A caster characterized in that a radial bearing can be removed from the opening and separated from the wheel by cutting the claw. In a caster formed by insert molding a first radial bearing serving as a bearing for a turning shaft into a synthetic resin yoke and a second radial bearing serving as a bearing for an axle on a synthetic resin wheel,
The yoke is formed with an opening having a size capable of taking out the first radial bearing in the axial direction,
The edge of the opening of the yoke is provided with a plurality of claws that project toward the opening and engage the first radial bearing, and the first radial bearing is removed from the opening by cutting the claws. Can be separated from the yoke,
The wheel body is formed with an opening having a size capable of taking out the second radial bearing in the axial direction,
The edge of the opening of the wheel body is provided with a plurality of claw portions that protrude toward the opening side to lock the second radial bearing, and the second radial bearing is removed from the opening by cutting the claw portions. A caster characterized in that it can be removed and separated from the wheel. 4. The caster according to claim 1, wherein a plurality of claw portions are provided at substantially equal intervals along the outer periphery of the opening, and extend toward the center of the opening. The caster according to any one of claims 1 to 4, wherein a thin portion is provided so that the claw portion can be easily folded at a midway position in the protruding direction.

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