KR20050006728A - Caster stopper - Google Patents

Abstract

PURPOSE: A caster stopper is provided to improve the productivity of a caster and a stopper and to enhance the productivity of manufactures by mounting casters of the same structure where a stopper is not mounted to the legs of manufactures. CONSTITUTION: A caster(1) comprises a yoke frame(2) and wheels assembled to the yoke frame in a freely rotatable state. A bearing support part(4) and an attachment bolt(5) attached to each leg of various manufactures are assembled to the yoke frame. A caster stopper(6) comprises a fixing unit and an operating unit. In the fixing unit, the right and left sides and the top attached in a built-up type to cover the opposite outside of the bearing support parts are integrally formed. An elastic braking piece, downward protruded toward the rear to elastically brake wheels, is formed to the rear of the top of the fixing unit. Side brackets(66) protruded parallel toward the rear are integrally formed to the rear ends of the right and left sides of the fixing unit. A shaft-receiving part(611) for elastically pushing the elastic braking piece, in a state of being assembled rotatably by a shaft pin(7) having both ends fixed to the side brackets, and a push plate are integrally formed to the operating unit.

Description

Caster stopper

The present invention relates to a stopper that is prefabricated to a yoke frame of a caster mounted on a leg of a piano, a chair, a movable bed, a cart, and the like so as not to roll a wheel.

Products such as patient portable beds and patient transport beds or carts, which are typically used in pianos, chairs or hospitals, are equipped with castors on each leg. Casters with stoppers or brakes that prevent the wheels from rolling are listed above. It is not mounted on both front and rear legs of various products, but is mounted on only one of the front and rear legs (front or rear), which prevents rolling only the caster's wheels. This is because the product can be stopped.

In addition, casters with stoppers or brakes (hereinafter referred to as controlled casters) are more expensive than casters without stoppers and brakes (hereinafter referred to as uncontrolled casters). In the case of a product manufacturer, an expensive caster is attached to all of the front and rear legs to produce a product without using a control caster and an uncontrolled caster together.

The caster has a short or long service life depending on the quality of the bearing rotatably supporting the yoke frame. For example, when the bearing quality is not good, the service life of the caster is shortened, and when the bearing quality is good, the service life is long.

Therefore, a product manufacturer that manufactures products such as a piano, a chair, and a mobile bed selects a caster using a bearing with a long service life to produce the product.

Conventional controlled casters are mostly structured in which a stopper or brake is pre-mounted on a caster shaft rotatably assembled to the yoke frame. Accordingly, the controlled caster has a stopper because the yoke frame must accommodate a stopper or a brake device. Or larger than the yoke frame of an uncontrolled caster without brakes. Therefore, the casters and the uncontrolled casters have different yoke frame specifications and different structures, and these casters have to be produced separately through different manufacturing processes.

As described above, since the control casters and the non-control casters are different in size and structure, there are stoppers or brakes (rotation control casters) and non-controllers (products that produce pianos, chairs, movable beds, etc.). The design of the bridge structure of the product should be different according to the structure and size of the casters to increase the design cost of the product. Also, when producing the above-mentioned products, the control caster and the non-control caster must be accurately selected and installed. It is pointed out that the problem is that the productivity of the assembly process is difficult and the productivity is lowered.

On the other hand, if the bearings used in the controlled casters are of poor quality, but the bearings used in the uncontrolled casters are of high quality, the producers cannot replace the uncontrolled casters on the bridge where the controlled casters are installed to produce the product. do.

Therefore, the present invention enables to mount the stopper to the caster prefabricated, thereby improving the productivity of the caster and the stopper, and also in the product manufacturer to be able to mount the caster of the same structure that is not equipped with a stopper to the product leg It was invented for the purpose of increasing the productivity of the product.

Means of the present invention for achieving the above object,

In the caster consisting of a yoke frame assembled with an attachment bolt and a bearing support attached to each leg of various types of products such as a piano, a chair, a mobile bed, and a cart, and wheels freely assembled to the yoke frame,

As one side of the yoke frame, the upper surface and the left and right sides that are prefabricated to be assembled so as to surround the outer surface of the opposite side of the bearing support are integrally formed, and the rear end of the upper surface has a rear to elastically brake the wheel. A fixture having integrally formed elastic braking pieces protruding downwardly toward both sides, and both side brackets protruding in parallel toward the rear at rear ends of the left and right sides;

An actuating tool having a bearing plate and a pressing plate integrally formed therein for pressing the elastic braking piece while being rotatably assembled by shaft pins fixed at both ends of the bracket of the fixture;

It is characterized by consisting of,

In addition, the fastener is formed on the upper surface of the yoke frame is inserted into the upper side of the upper hole drilled in the upper plate of the yoke frame and the insertion protrusion piece to be caught on the inner surface, and each of the left and right sides facing each other formed to protrude toward the inside of the yoke frame It is characterized in that it is fixed to the yoke frame by the left and right protrusions inserted into the side of the left and right holes drilled in each of the right side plate,

In addition, the operation tool, the inclined surface for elastically pressing the elastic braking piece of the fixture to the bearing portion, the state in which the inclined surface is locked to the engaging portion of the elastic braking piece when pressing the elastic braking piece to press the elastic braking piece It is characterized in that the locking step is formed for fixing to.

1 is a perspective view of the stopper of the present invention assembled to the caster yoke frame.

Figure 2 is a perspective view of the stopper of the present invention separated from the caster yoke frame.

3 and 4 are assembled to attach the stopper of the present invention to the yoke frame of the caster

State diagram.

5 is a cross-sectional view taken along the line A-A of FIG.

Figure 6 is a bottom perspective view of the stopper operation tool of the present invention.

Figure 7 is a sectional view of the stopper operation state of the present invention.

※ Explanation of code for main part of drawing

1: caster 2: yoke frame

3: wheel 4: bearing support

5: Mounting bolt 6: Stopper

6a: Fixture 6b: Actuator

21: top plate 22, 23: left and right

24: upper hole 25, 26: left and right holes

60: top plate 61: fitting stones

62,63: left and right side 64,65: left and right side protrusion

66: bracket 67: elastic braking piece

68: wheel pressing portion 69: locking portion

610: shaft ball 611: bearing part

612: pressure plate 613: inclined surface

614: engaging step 7: shaft pin

An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a state in which the stopper of the present invention is assembled to the caster yoke frame, and FIG. 2 is a perspective view of a state in which the stopper of the present invention is separated from the caster yoke frame, and FIGS. 3 and 4 are casters of the stopper of the present invention. Figure 5 is an assembled state diagram attached to the yoke frame, Figure 5 is a cross-sectional view taken along line AA of Figure 4, Figure 6 is a bottom perspective view of the stopper operation tool of the present invention, Figure 7 is a cross-sectional view of the stopper operation state of the present invention.

Reference numeral 1 denotes a caster, and the caster 1 is composed of a yoke frame 2 and wheels 3 rotatably assembled to the yoke frame, and an upper end 21 of the yoke frame 2. The bearing support part 4 and the attachment bolt 5 are attached.

The present invention is characterized in that the stopper 6 can be installed in the yoke frame 2 of the caster 1 in a prefabricated manner.

The stopper 6 is composed of a fastener (6a) to be assembled and fixed to the rear end side of the yoke frame (2) and an operating tool (6b) rotatably assembled to the fastener, the fastener (6a) is excellent in elastic force It is made of stainless steel plate, and the operating port 6b is made of plastic.

The fastener 6a of the stopper 6 has a cross section so as to surround the top plate 21 and the left and right plates 22 and 23 of the yoke frame 2. "It is formed in a shape, the cross section of the upper end of the upper surface 60 so as to be inserted into the upper surface of the upper hole 24 drilled in the upper plate 21 of the yoke frame 2 to be caught on the inner surface" b "A shaped fitting piece 61 is formed to protrude, and the left and right plates 22 and 23 of the yoke frame 2 are provided at the lower ends of the left and right sides 62 and 63 of the fastener 6a. The left and right protrusions 64 and 65, which are elastically inserted and fixed in each of the left and right holes 25 and 26, which are drilled in the middle portion, protrude toward the inside.

The left and right protrusions 64 and 65 are formed in a structure that is punched in the left and right pieces 62 and 63 itself so as to protrude to have an arc-shaped cross section in the up and down direction.

On both sides of the rear end of the fixture 6a, both side brackets 66 protruding in parallel to each other are formed, and an elastic braking piece 67 protruding downward toward the rear side is formed between the both side brackets. At the end of the elastic braking piece 67, a wheel pressing portion 68 is bent upwardly formed, and a bent engaging portion 69 is formed at a position spaced apart from the wheel pressing portion 68 at a predetermined interval. It is.

The actuating opening 6b of the stopper 6 includes a bearing part 611 and a flat plate having a shaft hole 610 through which shaft pins 7 fixed at both ends are fixed to both brackets 66 of the fastener 6a. The pressing plate 612 is formed integrally, and the elastic braking piece 67 is elastically resilient when the bearing portion 611 is rotated by using the shaft hole 610 of the bearing portion 611 as a rotational starting point. In the state where the inclined surface 613 and the bearing part 611 for rotation to complete the rotation at a predetermined angle, a locking step jaw 614 that is caught by the locking portion 69 is formed.

The action of assembling the stopper 6 of the present invention configured as described above to the caster 1 and the action of stopping the wheel 3 will be described.

First, when the stopper 6 is to be assembled to the yoke frame 2 of the caster 1, as shown in FIG. 3, the fitting protrusion piece protruding from the tip of the upper plate 60 of the fastener 6a of the stopper 6 is shown. 61 is inserted above the upper hole 24 of the yoke frame 2, and then the left and right sides 62 and 63 of the fastener 6a are directed outward as shown by a virtual line in FIG. While opening elastically, while pushing the fastener 6a toward the yoke frame 2, push the left and right protrusions 64 and 65 into the left and right holes 25 and 26, and the left and right sides ( The left and right protrusions 64 and 65 are pinched by the left and right holes 25 and 26 by the self-elastic restoring force of 62 and 63, so that the fastener 6a is yoke as shown in FIG. It is assembled in a fixed state to the frame (2), the elastic braking piece 67 of the fastener (6a) assembled in this way is a state spaced at a predetermined interval from the wheel (3) the wheel (3) It can rotate freely.

Next, an operation of braking the wheel 3 with the stopper 6 will be described.

In order to prevent the wheel 3 from being rolled by the stopper 6, when the rear end of the pressing plate 612 of the actuating tool 6b is pressed, the actuating tool 6b itself is a drawing of the shaft pin 7 as the starting point of rotation. It rotates in a clockwise direction. At this time, the inclined surface 613, which is formed at the end of the bearing portion 611, supported by the elastic braking piece 67, rotates and moves the elastic pressure spreader 67 toward the liquid. Push the wheel pressing portion 68 forcibly presses the outer circumferential surface of the wheel (3), when the wheel pressing portion 68 is pressed in a strong elasticity so that the wheel (3) does not rotate the bearing part The catching step 614 formed at the end of the 611 is caught by the catching portion 69 of the elastic braking piece 67. At this time, the operating hole 6b is not elastically rotated to its original position. 67) while maintaining the state of pressing strongly The topper 6 is to restrain the wheel 3 from rolling.

On the other hand, when you want to release the stopper (6) is braking to prevent rolling the wheel (3) as described above when pressing the front end of the pressing plate 612 of the operating port (6b) or if the rear end is raised up The bearing part 611 of the sphere 6b rotates the shaft pin 7 counterclockwise from the drawing point, so that the locking step 614 is released from the locking part 69 and rotates counterclockwise. Since the elastic braking piece 67 moves away from the wheel 3 by the elastic restoring force and returns to its original state, that is, before braking (see FIG. 4), the wheel 3 can be rolled freely. Will be.

As described above, the present invention enables the yoke frame and the stopper of the caster to be manufactured individually through different manufacturing processes, thereby improving productivity of the caster and the stopper, and the caster is pre-assembled with the stopper. Not only can be attached to the legs of pianos, chairs, movable beds, carts, etc., but also the stoppers can be assembled after the casters are attached to the legs of each product. Assembling the stopper with consideration, for example, to improve the productivity of the product by allowing the stopper to be assembled in advance before attaching the caster to the leg of the product or assembling the stopper after attaching the caster to the leg of the product. It can provide an effect.

Claims (3)

In the caster consisting of a yoke frame assembled with an attachment bolt and a bearing support attached to each leg of various types of products such as a piano, a chair, a mobile bed, and a cart, and wheels freely assembled to the yoke frame, As one side of the yoke frame, the upper surface and the left and right sides that are prefabricated to be assembled so as to surround the outer surface of the opposite side of the bearing support are integrally formed, and the rear end of the upper surface has a rear to elastically brake the wheel. An elastic braking piece projecting downwardly inclined downward, and a fixture having integrally formed at both rear ends of the left and right surfaces, the two side brackets projecting in parallel toward the rear; An actuating tool having a bearing plate and a pressing plate integrally formed therein for pressing the elastic braking piece while being rotatably assembled by shaft pins fixed at both ends of the bracket of the fixture; Caster stopper, characterized in that consisting of. The method of claim 1, The fastener is formed on the upper surface of the yoke frame is inserted into the upper side of the upper hole which is drilled in the upper plate of the yoke frame and the locking protrusion on the inner surface, and formed to protrude inwards facing each other on the left and right sides, respectively, Caster stopper, characterized in that is fixed to the yoke frame by the left and right protrusions inserted into the side of the left and right holes drilled in each of the right plate. The method of claim 1, The actuating tool is inclined surface for elastically pressing the elastic braking piece of the fastener to the bearing portion, and when the inclined surface elastically presses the elastic braking piece, it is caught in the engaging portion of the elastic braking piece to press the elastic braking piece. Caster stopper, characterized in that the locking step is formed for fixing.