JPH0612965Y2 - Caster with stopper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention can be used by switching between a state in which a wheel mounted between opposite side walls of a wheel case is allowed to rotate and a state in which the wheel is prevented from rotating. The present invention relates to casters with a stopper.

[Conventional technology]

A conventional caster with a stopper is provided with a pin retaining mechanism for pivotally supporting the wheel and a wheel stopper separately, and the stopper presses against the peripheral surface of the wheel for ground rolling to prevent the wheel from rotating. It was configured to block.

A specific example of the above is proposed in Japanese Utility Model Publication No. 34-16127.

As another means, in Japanese Utility Model Publication No. 55-28563, a lock pin of a stopper is provided, which is circumscribable to a part of a wheel on a main body supporting a wheel so that the rotation of the wheel can be locked or unlocked. Is urged by the elasticity of the compression spring interposed between the main body and the boss as a releasing force, and is attached so that it can project from the window hole of the main body.
The base end is fixed to the main body, is fitted and inserted into the control piece which is attached to the lock pin at an arbitrary inclination angle, and
By providing a pin for releasing the lock pin on this control piece,
It has been proposed that the control piece can be pushed down by pushing the release pin.

[Problems to be solved by the device]

All of the above-mentioned conventional examples adopt a configuration in which the components for controlling the wheel lock are housed between the pair of left and right wheels and inside the wheel holding case. Since the lock member cannot be operated directly and easily, it can be handled only through a large number of auxiliary parts, and there is a drawback that the number of parts is large, and the structure is complicated,
It required many causes of failure and was inevitably expensive.

Furthermore, in both of the conventional examples, a wheel case in which wheels are mounted on
Since the stopper and the retaining mechanism for the pin that pivotally supports the wheel are individually provided, the number of parts is further increased, and the entire structure is inevitably inevitable. It was

Also, in order to stop the rotation of the wheel securely, the stopper is pressed against the peripheral surface of the wheel to prevent the wheel from rotating.
It was necessary for the peripheral surface of the wheel to have a large friction coefficient such as rubber.

When the material of the wheel is a hard synthetic resin, etc., the friction coefficient is small, so the wheel peripheral surface part that contacts the stopper must be formed in an uneven shape to prevent relative slip, and as a result, the wheel During normal use, which allows rotation of
There is a drawback in that the rolling of the wheels on the ground causes rattling and the movement of the caster-equipped article is not smooth. In addition, when the floor surface is finished with carpet or other soft material, it is easy for the floor surface to have uneven marks due to the wheel peripheral surface.

SUMMARY OF THE INVENTION An object of the present invention is to provide a caster with a stopper which has a simple structure and is capable of eliminating the above-mentioned drawbacks of the prior art and has few failures.

[Means for Solving the Problems]

The technical means taken by the present invention to achieve the above object are as follows. That is, in the caster with a stopper according to the present invention, a wheel is formed by forming a concavo-convex portion in which a plurality of convex portions are annularly arranged along the peripheral surface portion on the side of the peripheral surface portion for ground rolling. The wheel case is inserted between the opposing side walls, and is rotatably supported by a pin inserted through the opposing side wall so that both ends of the pin are covered on the outside of the opposing side wall of the wheel case. At the position, the U-shaped stopper facing plate portion is arranged and the stopper is linearly reciprocally mounted, and the inner surface of the stopper is formed with a protrusion for engaging the uneven portion, By moving the stopper inward in the radial direction of the wheel,
The first engagement state in which the projection enters the recess of the uneven portion and becomes the engagement state, and the stopper is moved outward in the radial direction of the wheel so that the projection is released from the recess and the engagement is released. It is characterized in that it is configured to have two states.

[Action]

According to the above configuration, rotation of the wheels is allowed in the second state, and rotation of the wheels is blocked by switching to the first state.

Further, the opposing plate portion of the U-shaped stopper arranged on the outside of the case is simply reciprocated by pinching it with, for example, the thumb and the forefinger, so that the protrusion formed on the inner surface of the stopper is used to It is possible to directly and easily engage and disengage the unevenness.

Moreover, since the protrusion of the stopper is engaged with the uneven portion provided on the side portion of the ground contact rolling peripheral surface portion of the wheel to prevent the wheel from rotating, it is not necessary to use a rubber material having a large friction coefficient for the peripheral surface portion. However, the rotation of the wheels is surely blocked, and yet
During normal use in which the rotation of the wheel is allowed, the peripheral surface of the wheel rolls on the ground, so that the wheel rolls on the ground and the article with casters moves smoothly.

The pins that pivotally support the wheels are prevented from coming off by stoppers at positions that cover both ends of the pins, and the stoppers also serve as a mechanism for preventing the pins from coming off.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 shows an organizing shelf using casters with stoppers A according to the present invention, and B is a column made of a metal pipe, and the casters with stopper A are attached to the lower ends of the columns B.

As shown in FIG. 1, the caster A with a stopper is composed of a wheel case 1, a wheel 2, a pin 3 for pivotally supporting the wheel 2, and a U-shaped stopper 4. The illustrated wheel case 1, wheel 2, and stopper 4 are all made of synthetic resin.

In addition, although it is not always necessary to construct the caster A with a stopper of the present invention, in the illustrated embodiment,
A metal plate nut member 5 having detents 5a, 5a on both side edges is press-fitted into the flat vertical hole 1b formed in the columnar portion 1a of the wheel case 1 so as to be fitted and killed.
When the casters A with stoppers are attached to the lower ends of the columns B, the columnar portion 1a is inserted into the columns B as shown in FIG.
Is cast into the flat plate nut member 5 through the lateral hole 1c of the columnar portion 1a to fix the caster A with a stopper to the lower end of the column B.

The detailed structure of the caster A with a stopper is as follows.

As shown in FIGS. 3 and 5 to 8, the wheel case 1 includes a ceiling wall portion 1d having an arcuate inner surface, opposing side walls 1e and 1e having an inner surface perpendicular to each other, and a right angle to this. The side walls 1f, 1f which are adjacent to each other and whose inner surface has an arc shape are formed into a box-like shape with an open bottom surface. Pin holes 7 and 7 are formed in the opposing side walls 1e and 1e, and the wheel 2 is mounted between the opposing side walls 1e and 1e by a pin 3 that can be inserted into and removed from the pin holes 7 and 7.

As shown in FIGS. 1 and 6, the wheel 2 includes a plurality of smooth peripheral surface portions 2a for ground contact rolling and a plurality of side surface portions 2a at predetermined pitches along the peripheral surface portion 2a. The projections and depressions 2b are formed by arranging the projections in a ring shape.
It should be noted that the annular outer diameter formed by the array of the uneven portions 2b is at least the same as the diameter of the circumferential surface portion 2a, or preferably, so that the uneven portions 2b ... Do not project radially outward from the circumferential surface portion 2a. , Shorter than that.

As shown in FIGS. 1 and 5, the stopper 4 is formed in a U-shape by a pair of opposing plate portions 4a, 4a having slip-resistant outer surfaces and a plate portion 4b located between one ends of these. Are formed on the inner surface of the stopper 4, projections 8, 8 for engaging with the concave-convex portions 2b are formed over the inner surfaces of the facing plate portions 4a, 4a and the inner surface of the plate portion 4b, and On the inner surfaces of the facing plate portions 4a, 4a, detent protrusions 9, 9 and positioning protrusions 10, 10 are formed.

On the other hand, as shown in FIGS. 1 and 4, the wheel case 1 has opposing side walls 1e and 1e and a side wall 1f adjacent to one side thereof.
And the notches 11 and 11 corresponding to the protrusions 8 and 8.
And the through holes 12, 12 corresponding to the detent protrusions 9, 9 and the recesses 13, 13 corresponding to the protrusions 10, 10 are formed as shown in FIGS. 4 and 5. It is formed on the opposite side walls 1e, 1e. Further, on the outer surface of the opposing side walls 1e, 1e, as shown in FIG.
As shown in FIG. 3, guide rail portions 14, 14 corresponding to the vertical widths of the facing plate portions 4a, 4a are formed.

Then, while the opposing plate portions 4a, 4a of the stopper 4 are pushed and spread against the elastic restoring force thereof, the opposing side wall 1 of the wheel case 1 is
The detent protrusions 9 and 9 are provided on the outer side of the e and 1e,
The stopper 4 is linearly reciprocally attached to the wheel case 1 by being pushed in until it fits into the wheels 2 and 12, and by the reciprocating movement of the stopper 4, the projections 8 and 8 are formed into the concave and convex portions 2b. Is configured to be switched between a first state in which the engagement is performed and a second state in which the engagement is released.

In the caster A with a stopper having the above structure, as shown by the phantom line in FIG. 6, by moving the stopper 4 outward in the radial direction of the wheel 2, the engagement between the projections 8, 8 and the uneven portions 2b. The state is released and the second state is reached, and the rotation of the wheel 2 is allowed.

By moving the stopper 4 in the opposite direction,
.. 8 engages with the concave and convex portions 2b ... And enters the first state, and rotation of the wheel 2 is blocked. In any of the first and second states, since the convex portions 10 and 10 are fitted into the concave portions 13 and 13, the operator is required to fit the convex portions 10 and 10 into the concave portions 13 and 13 respectively. It is possible to confirm that the stopper 4 has been operated to a predetermined position by the clicking sound and the feeling of the fingertip.

Further, when the stopper 4 is in either the first or second state, the opposing plate portions 4a, 4a of the stopper 4 cover both sides of the pin holes 7, 7 and prevent the pin 3 from coming out.

In this embodiment, the projections 8 and 8 of the stopper are fitted to the notches 11 and 11 of the wheel case, and the guide rail portions 14 and 14 of the wheel case and the facing plate portions 4a and 4a of the stopper 4 are fitted. By fitting, the pin 3 of the stopper 4 to the wheel case 1
Prevents rotation around, but has protrusions 8 and 8 and notch 1
When the rotation of the stopper 4 around the pin 3 with respect to the wheel case 1 is restricted by fitting with 1, 1 or fitting with the detent projections 9, 9 and through holes 12, 12, or both,
The guide rail portions 14 and 14 may be omitted. In the illustrated embodiment, the uneven portions 2b ... Are formed in a gear shape,
The protrusions and recesses 2b may be formed by projecting a large number of independent protrusions from the side surface of the peripheral surface portion 2a in parallel with the axial direction at predetermined intervals. Further, the present invention can be implemented by providing the uneven portions 2b ... Only on one side portion of the wheel peripheral surface portion 2a.

FIG. 9 shows another embodiment of the present invention. In this embodiment, two members 2 each having a smooth peripheral surface portion 2a, 2a for grounding rolling are provided.
The wheels 2 are formed by fitting the A and 2B into a state in which they are stopped from each other via the cylindrical boss portions 2c and 2c of the two, and the peripheral surface portion 2
A concave-convex portion 2b is formed between a and 2a, that is, on the surface of one cylindrical boss portion 2c, and the stopper 4 has an inner surface of a plate portion 4b located between one end portions of the facing plate portions 4a and 4a. Is characterized in that a protrusion 8 for engaging with the uneven portions 2b is provided. The other structure is the same as that of the previous embodiment.

[Effect of device]

Since the present invention has the above-mentioned configuration, the following effects can be obtained.

Since the wheel is placed inside the case and the U-shaped stopper is placed on the outside of the case, unlike the conventional structure in which the stopper is placed inside the case, it is U-shaped. The protrusions formed on the inner surface of the stopper can be directly engaged / disengaged with the irregularities of the wheel by simply pinching the facing plate portion of the stopper with, for example, the thumb and the index finger and simply moving the stopper plate back and forth. Therefore, the two operations of the stop action and the release thereof can be easily performed manually, and the engagement / disengagement action can be surely known by the feeling of the fingertip. Moreover, in addition to not requiring many auxiliary parts as in the past, this stopper also serves as a retaining mechanism for the pin that pivotally supports the wheel, which greatly simplifies the structure and also As a result, the cause of failure can be significantly reduced, and it can be provided at low cost.

Since the protrusion of the stopper is engaged with the uneven portion provided on the side surface of the peripheral surface portion of the wheel for grounding rolling, the rotation of the wheel is blocked,
Even if you do not use rubber with a large friction coefficient on the peripheral surface, the rotation of the wheel is surely prevented, and in normal use where the rotation of the wheel is allowed, the peripheral surface of the wheel rolls on the ground. In addition, rolling of the wheels on the ground and movement of caster-equipped articles are smooth.

[Brief description of drawings]

1 to 8 show an embodiment of the present invention, FIG. 1 is an exploded perspective view of a caster with a stopper, FIG. 2 is a perspective view of a storage cabinet showing an example of using the caster, and FIG. FIG. 4 is a vertical cross-sectional view of the mounting portion of the caster, FIG. 4 is a side view of the caster with a stopper showing the stopper and the wheel case in a disassembled state, and FIG. 5 is a transverse view of the caster with a stopper showing the disassembled state in the stopper and the wheel case. A plan view, FIG. 6 is a vertical sectional side view of a caster with a stopper at a wheel lateral position, FIG. 7 is a vertical sectional side view of a caster with a stopper at a central position of the wheel, and FIG. 8 is a state in which rotation of the wheel is blocked. It is a cross-sectional top view of the caster with a stopper. FIG. 9 shows another embodiment of the present invention and is a cross-sectional plan view of a caster with a stopper, which is disassembled into a stopper and a wheel case. 1 ... Wheel case, 1e ... Opposing side wall, 2 ... Wheel, 2a ...
… Peripheral surface part, 2b… Concave and convex part, 3 …… pin, 4 …… stopper, 8 …… projection.

Claims (1)

[Scope of utility model registration request] 1. A wheel formed by forming a concavo-convex portion, in which a plurality of convex portions are annularly arranged along the peripheral surface portion, on a side portion of the peripheral surface portion for grounding rolling, facing a wheel case having an open bottom surface. A pin that is inserted between the side walls and is rotatably supported by a pin that is inserted into and removed from the opposing side wall is rotatably mounted on the outside of the opposing side wall of the wheel case at a position that covers both ends of the pin. The stopper is mounted on the inner surface of the stopper so as to engage with the concave-convex portion so that the opposed plate portion of the stopper can be arranged linearly and reciprocally. When the protrusion is moved inward in the radial direction, the protrusion enters the concave portion of the concave and convex portion to be in the engaged state, and the stopper is moved outward in the radial direction of the wheel so that the protrusion is moved to the concave portion. So that it is in the second state where it is released from the Stopper casters, characterized in that you have configured.