JP3161658U - Caster structure - Google Patents

Abstract

A caster capable of locking and releasing a wheel by rotating a release button. A caster includes a base, a wheel, a braking arm, and a release button. The base rotatably supports the wheel on the rotating shaft, and the wheel has an annular rack tooth 211 formed on the inside thereof, and has a ratchet tooth that is always pressed against the rack tooth by a spring. The brake arm is rotatably provided, and the release button is provided with a convex ring portion 413 having an inclined surface with respect to the brake arm, and the brake arm is pressed against the inclined surface of the convex ring portion by rotating the release button. Thus, the meshing between the rack teeth and the ratchet teeth can be released. [Selection] Figure 1

Description

  The present invention relates to a caster structure, and in particular, ensures an operation of rotating a release button to lock and release a wheel.

  Many casters applied to the bottom of a property such as a chair, figurine shelf, chest, wagon, etc. have a base, and a wheel is pivotally mounted on the base, and a braking component is provided on the base. . By operating the braking component up and down, the wheel is locked or unlocked.

JP 2001-277806 A JP-A-10-203106

The problem to be solved is that when the above-mentioned known caster structure is locked, the reaction force of the braking component and the action of releasing it are the same in the wheel, so the braking component and the wheel are automatically released. It becomes easy to be done, the action is solved, and the property on it, for example, a seat chair, etc. moves freely, and danger easily occurs.

In addition, a known caster-type braking component is usually operated by a user with a long projecting operation rod, but this long projecting operation rod projects outward, so that the user or object is caught. There is a drawback that it is easy to move.

In view of these problems, the present inventor repeatedly researches and proposes a caster structure for improving them.

  The present invention includes a base, wheels, a braking arm, and a release button. The base is provided with a rotating shaft, and a pivot base is further provided on the base. The wheel is rotatably supported on the rotation shaft of the base, and an inner side of the wheel forms an annular rack tooth on the inner peripheral side of the inner convex edge. The braking arm has its first end pivoted on the pivot base of the base, and the second end is provided with a braking portion and accommodated in the inner convex edge of the wheel. A spring is arranged between the braking arm and the base, and the braking portion at the second end of the braking arm constantly presses the inner circumferential surface of the inner convex edge of the wheel to brake the wheel. Furthermore, the release button is provided on the base so as to be rotatable, and is provided with a convex ring portion having an inclined surface that presses against the braking arm. Normally, the wheel is locked by the braking arm, but by the rotation of the release button, the inclined surface of the convex ring portion presses the second end of the braking arm and moves backward so that the braking portion of the braking arm The main feature is to release the wheel from the locked state and freely rotate the wheel.

  The caster structure of the present invention has an advantage that the lock is ensured by rotating the release button to lock the wheel or releasing the lock.

It is an exploded perspective view of the present invention. It is a bottom side perspective view of the release button of the present invention. It is a perspective view which shows the locked state of this invention. FIG. 4 is a cross-sectional structure diagram in the 4-4 direction of FIG. 3. It is a perspective view of the state where the release button of the present invention was rotated and released. FIG. 6 is a cross-sectional structure diagram in the 6-6 direction of FIG. 5.

An object of the present invention includes a base, wheels, a braking arm, and a release button by providing a caster structure. The base has a rotating shaft and a pivot base on the base. The wheel is pivoted on the rotation axis of the base, and the inside of the wheel is formed into an annular shape with an inward convex edge. The braking arm has a first end pivoted on the pivot base of the base, and a second end is provided with a braking portion, which is projected onto the inner convex edge of the wheel. Further, a spring is pressed between the braking arm and the base, and the spring always presses the inner convex edge of the wheel by the braking portion at the second end of the braking arm to brake the wheel. Furthermore, the release button is fitted on the base and includes a convex ring portion. The brake arm is normally pressed, the convex wheel part freely rotates the wheel according to the rotation of the release button, pressing the second end of the brake arm so that the brake part of the brake arm does not press the wheel. Let

The present invention has a caster structure and is applied to casters such as a seat, a chiffon, a figurine shelf, a wagon, and so on.

In the caster structure of the present invention, the inner convex edge of the wheel is provided with a number of rack teeth, the braking portion of the braking arm is provided with a corresponding ratchet tooth, and meshes within the rack teeth of the wheel. Brakes the wheel rotation.

In the caster structure of the present invention, by rotating the release button, the braking arm is interlocked and retracted, and the braking arm does not brake the wheel or does not press the braking arm. The braking arm is pressed against the wheel by the spring force of the spring to brake the free rotation of the wheel. Whether the wheel of the present invention is braked or not is determined by rotating the release button, and in addition to ensuring the operation, the operation is also labor-saving, and the braking depends on hitting or stepping on an external force or an external object. The release prevents the wheel from sliding freely, and the present invention has a novelty and industrial utility.

The present invention will be described with reference to the following examples.

As shown in FIGS. 1 to 6, the caster structure of the present invention includes a base 10, a wheel 20, a braking arm 30, and a release button 40. The base 10 includes a rotating shaft 11, and further, a pivot base 12 is installed in the base 10. The wheel 20 is pivotally provided on the rotation shaft 11 of the base 10 so as to form an annular rack tooth 211 on the inner peripheral surface of the inner convex edge 21 inside the wheel 20. The first end 30a of the braking arm 30 is pivotally connected to the pivot base 12 of the base 10, the second end 30b is provided with a braking portion 31, and is accommodated in the inner convex edge 21 of the wheel 20, and A spring 32 is arranged between the braking arm 30 and the base 10, and the spring 32 always presses the inner peripheral surface of the inner convex edge 22 of the wheel 20 by the braking portion 31 of the second end 30 b of the braking arm 30. The wheel 20 (see FIGS. 3 and 4 as an example) is braked. The release button 40 is installed on the base 10 and includes a convex ring portion 413. Usually, the release button 40 is above the braking arm 30. The two ends 30b are pressed and pressed down to release the pressing between the braking portion 31 of the braking arm 30 and the inner peripheral surface of the inner convex edge 22 of the wheel 20 or the engagement between the rack teeth and the ratchet teeth. Rotate. [See FIGS. ].

The caster structure of the present invention is a caster applied to a seat chair, a chiffon, a figurine shelf, a wagon, etc., but the present invention is not limited to its application range.

In the caster structure according to the present invention, the base 10 includes a frame plate 110, and a shaft hole 111 is formed in the horizontal direction on the frame plate 110, and the central portion of the rotary shaft 11 is inserted therethrough. Wheels 20 are pivotally mounted at both ends thereof, respectively. Further, the pivot base 12 is installed on the frame plate 110, a pivot hole 120 is drilled in the pivot base 12, and the pivot pin 121 is connected to the pivot hole 120 and the braking arm 30. The brake arm is rotatably supported through the first end 30a.
Further, the frame plate 110 is provided with a storage space 13 between the inner convex edges 21 of the wheels 20 on both sides, and accommodates the second end 30b of the braking arm 30 in a lateral direction. The braking arm 30 is disposed relative to 21.
The uppermost edge of the frame plate body 110 is formed integrally with the wheel cover 14, and the upper half of the wheel 20 is covered with the cover.
A button hole 141 is formed on the upper side of the wheel cover 14, and a pivot shaft portion 412 of the release button 40 is inserted therethrough, and the release button is rotatably supported by the shaft portion 412. An arc-shaped slit 142 surrounding the button hole 141 is formed, and the convex button 413 of the release button 40 is inserted so that the release button can be rotated by a certain angle.

As shown in FIGS. 1 and 4, in the caster structure of the present invention, the base 10 is provided with a spring positioning column 15, and the brake arm 30 opposed thereto is provided with a fitting groove 33 so that the spring 32 is attached to the base 10. The spring is fixed to the spring positioning column 15 and is stably fitted between the fitting grooves 33.

In the caster structure of the present invention, the inner convex edge 21 of the wheel 20 is a flat surface or a plurality of rack teeth 211 are arranged at equal intervals on the inner periphery of the inner convex edge 21 as shown in FIGS. A corresponding ratchet tooth 311 is installed in the braking portion 31 of the braking arm 30 facing the wheel, and the ratchet tooth 311 of the braking arm 30 is engaged with the rack tooth 211 of the wheel 20 to freely rotate the wheel 20. Brake.

As shown in FIGS. 1 and 2, the release button 40 of the caster structure of the present invention includes a disk body 41, and a first side of the disk body 41 is provided with a protruding portion 411 protruding, which is picked up by a user. Then, the release button 40 is rotated. On the second side opposite to the disk body 41, a shaft portion 412 is provided so as to protrude, and is fitted into the button hole 141 of the base 10 to rotatably support the release button, and A convex ring portion 413 having an inclined surface is provided on the second side of the disc body 41, and the convex ring portion 413 is inserted through the slit 142 and pressed on the braking arm 30 by the inclined bottom edge. 5 and 6, when the release button 40 is rotated by a certain angle, the convex wheel portion 413 presses the braking arm 30 back by the inclined surface, and the braking portion 31 and the wheel 20 are moved backward. The brake operation of the wheel 20 is loosened by releasing the engagement between the inner rack teeth 211 and the ratchet teeth 311. When the user rotates the release button 40 to the opposite angle as shown in FIGS. 3 and 4, the convex ring portion 413 releases the pressure of the braking arm 30, and the braking arm 30 receives the elastic force of the spring 32. Thus, the braking portion 31 of the braking arm 30 is pressed toward the inner convex edge 21 of the wheel 20, and the rack teeth 211 and the ratchet teeth 311 inside the wheel 20 are engaged to brake the wheel 20. Lock the rotation.

In the caster structure of the present invention, by rotating the release button 40, the braking arm 30 is moved back together, and the braking arm 30 releases the wheel 20 from the braking state, and the locked state is released. Thus, the wheel 20 can freely rotate. Alternatively, when the release button 40 is rotated and the braking arm 30 is pressed against the convex wheel portion 413, the braking portion 31 of the braking arm 30 presses the wheel 20 by the spring force of the spring 32, and the wheel 20 is braked, the wheel 20 cannot rotate freely, and its rotation is locked. Whether or not the wheel 20 of the present invention is braked depends on the rotation operation of the release button 30, so that the operation is reliable and the operation is extremely labor-saving, and an external force or an external object is hit. The situation in which the wheel 20 freely rotates and starts running by releasing the brake by stepping on the vehicle is prevented, and the present invention has novelty and industrial practicality.

The structure of the caster of the present invention is the same as that of the spirit and scope of the present invention, and is not limited to the present invention.

DESCRIPTION OF SYMBOLS 10 Base 11 Rotating shaft 110 Frame plate body 111 Shaft hole 12 Pivoting base 120 Pivoting hole 121 Pivoting pin 13 Storage space 14 Wheel cover 141 Button hole 142 Arc-shaped slit 15 Spring positioning pillar 20 Wheel 21 Inner convex edge 211 Rack Teeth 30 Braking arm 30a First end 30b Second end 31 Braking part 311 Ratchet teeth 32 Spring 33 Fitting groove 40 Release button 41 Disc body 411 Knob part 412 Pivoting shaft part 413 Convex ring part

Claims (7)

In casters with wheels,
A wheel is rotatably supported on a rotating shaft provided on the base,
An annular convex edge is formed inside the wheel,
On the other hand, a brake arm provided at one end with a brake part in contact with the annular convex edge part is supported rotatably on the base,
A spring is provided between the braking arm and the base, and the braking force of the braking arm is pressed toward the annular convex edge inside the wheel by the elastic force thereof,
A button hole is provided in the base so that the release button is pivotably supported, and an arc-shaped slit is formed in contact with the button hole to provide a convex ring portion having an inclined surface provided on the release button. By rotating the release button with respect to the braking arm in communication with the slit, the braking arm is pressed by the inclined surface of the convex ring portion to release the pressing state between the braking portion of the braking arm and the annular convex edge portion inside the wheel. A caster structure characterized by that. The base comprises a frame plate,
A shaft hole is drilled laterally in the frame plate body, and the wheels are rotatably supported at both ends of the rotating shaft through the rotating shaft,
Further, a pivot base having a pivot hole formed in the frame plate body is provided, and one end portion of the brake arm is rotatably supported by a pivot pin, and the brake portion of the brake arm is placed in the accommodation space inside the wheel. 2. The caster structure according to claim 1, wherein the caster is accommodated in a lateral direction and its braking arm is disposed to be opposed to the la-annular convex edge portion inside the wheel. The frame plate body integrally forms a wheel cover that shields the upper half of the wheel at the uppermost edge,
3. The caster structure according to claim 2, wherein the button hole is provided on the wheel cover, and an arcuate slit is provided through the convex ring portion of the release button having an inclined surface.   The base is provided with a spring positioning column, a fitting groove is formed on the braking arm, and the spring is fitted between the spring positioning column and the fitting groove. 1. The caster structure according to 1.   The caster structure according to claim 1, wherein an inner side of the wheel is smooth.   A large number of rack teeth arranged at equal intervals are installed on the convex edge portion on the inner side of the wheel, and a corresponding ratchet tooth is installed on the braking portion of the braking arm so that the ratchet tooth of the braking arm is placed inside the rack tooth of the wheel. 2. The caster structure according to claim 1, wherein the free rotation of the wheel is braked when engaged with the wheel. The release button includes a disk body, the first side of the disk body has a knob portion protruding, and the second side of the disk body has a pivot shaft portion protruding into the button hole of the base. And a convex ring portion having an inclined surface is provided on the second side of the disc body so that the bottom edge of the convex ring portion presses the braking arm by rotating the release button. The caster structure according to claim 1.

Images