JPH0448961Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a fixture that can be added to an existing support leg with casters to fix the leg at a movable installation position and to finely adjust the height of the leg.

BACKGROUND OF THE INVENTION Although office furniture or household furniture with casters is convenient to move, it is necessary to stably fix the furniture in the installed position. For this reason, many appliances with casters are equipped with a brake pedal attached to the caster device, and fixing means such as interposing a cup-shaped receiving plate between the casters and the floor are used.

In addition, there are often differences in height between the four corner supporting legs depending on the installation position, and in order to deal with this, a leg length (height) adjustment device is provided on each supporting leg or several of them. .

For example, adjustment means have been used, such as raising and lowering a screw shaft provided at the end of the supporting leg, or, more simply, interposing a floor plate under the leg.

Problems to be Solved by the Invention By the way, casters equipped with brake pedals require the caster mechanism itself to become bulky and expensive, and for this reason, they are used for appliances or high-class items that are relatively frequently moved. Casters without a brake device are used for items that are not likely to be moved once installed, and in this case they are generally fixed using the aforementioned receiving plates. By the way, with these conventional fixing conditions, first of all, the caster, brake pedal, or receiving plate is exposed at the lower end of the support leg, and there is a risk of an unexpected accident such as getting the tip of a shoe caught on this part. Although dust easily adheres to it, it is not easy to remove dust using a vacuum cleaner or the like due to its complicated shape.

Moreover, the conventional brake device mainly stops the rotation of the caster roller, and because the ground contact area of the roller is small, it may slip during the braking state and the roller, which has an eccentric bearing structure, may play in the direction of change. I disliked the lack of stability, such as the occurrence of problems.

Therefore, the present invention is a simple means of fixing casters that do not have a brake device on this kind of support legs with casters.In addition to a device configuration that can be applied to existing support legs, it also has a fine adjustment function for leg height. This paper proposes a new fixing device.

Means for Solving the Problems As shown in the drawings, the present invention consists of a cylindrical body 1 having a thread 2 on its lower outer periphery, a threaded groove 4 threadedly engaged with the thread 2 on its inner periphery, and a circumferential collar 5 on its lower end outer periphery. This assumes a fixing device for a support leg with casters, which is composed of an operation barrel 3 having a circumferential groove 6 on its upper outer periphery, and a grounding ring 7 having a circumferential collar 8 rotatably fitted in the circumferential groove 6 on the inner circumference of its upper end. , is characterized by the following points.

The cylinder body 1 is not attached to the supporting leg 13. The screw groove 4 of the operating barrel 3 is provided leaving the upper end of the operating barrel 3 intact. A tool insertion hole 10 is provided in the middle portion of the operation barrel 3. The grounding ring 7 is made of synthetic resin, and the inner circumferential diameter of the circumferential collar 8 is gradually enlarged from the vicinity of the portion 8a, and the diameter between the portion 8a and the inner surface of the circumferential collar 8 facing the operating tube 3 is increased. It is formed larger than the outer peripheral diameter of the circumferential collar 5.

Function: By inserting the cylindrical body from the lower end of the supporting leg with casters so as to cover the caster part, the upper end becomes a cover cylinder whose upper end comes into contact with the supporting leg end or the caster mounting bracket.

On the other hand, the operation tube screwed onto the cylinder can be moved vertically with respect to the cylinder while being screwed in or out by the relative rotation thereof. This means that the length can be adjusted.

Therefore, when the cylinder body and operating cylinder are deeply threaded and the length of the cover cylinder is short, there will be vertical play between the end of the support leg and the floor, allowing the caster to move freely. It also moves as the caster turns and rotates, and moves as the supporting legs move.

Then, at the installation position, by rotating the operation tube and drawing it out against the cylinder, the vertical length of the cover tube gradually becomes longer, and finally the caster part is removed from the floor. Become supportive.

In this operation of extending the operation tube, unless the caster part is supported, no support load is applied to the tube, so it can be rotated relatively easily.
When it reaches the supported state and the supporting load is applied to it,
In addition to the frictional resistance on the screwing surface, the sliding resistance with the floor side becomes large, but at this time, the ground ring, which is rotatably slid on the lower end of the operating tube, slides against the operating tube with less resistance. In addition to acting as a contact body, it also functions as a supporting leg fixed end that presses against the floor surface in place of the supported caster part.

Furthermore, by attempting to extend the caster portion from the supported state, the entire supporting leg is lifted, so that the height of the leg can be adjusted in accordance with the amount of extension.

Next, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

Embodiment FIG. 1 is an exploded perspective view showing an embodiment of the present invention, in which a cylindrical body 1 made of a synthetic resin molded body has a size and shape that is large enough to fit a caster, and the lower part of its outer periphery. Several threads 2 are formed on the surface. Reference numeral 3 designates an operating cylinder, which has a threaded groove 4 on its inner circumferential surface, leaving a part of its upper end intact, which engages with the threaded thread 2 of the cylinder 1, and a circumferential collar 5 provided on its lower outer periphery. Upper step groove 6
The upper inner flange 8 of the ground ring 7 is fitted into the upper end inner flange 8 of the ground ring 7. Note that 9 indicates a stopper edge left at the upper end of the inner circumferential wall of the operating tube 3, and 10 similarly indicates a tool insertion hole provided in the intermediate grip portion of the tube 3. The grounding ring 7 has a lower end formed into a wide flange portion 11 extending inwardly along the grounding surface, and as shown in FIG. The diameter between the portion 8a and the inner surface of the collar 8 facing the portion 8a is made larger than the outer diameter of the circumferential collar 5 of the operation tube 3.

FIG. 2 shows how these members are assembled. That is, the operating tube 3 into which the grounding ring 7 is rotatably fitted,
Although it is placed over the cylinder 1 from above and screwed together, the installation of the grounding ring 7 to the operating cylinder 3 is as follows.
With the opposite side of the cut out part 8a of the inner flange 8 of the ring 7 fitted into the step groove 6 of the operation barrel 3, by strongly pressing the front part 8a side, the synthetic resin material is removed. With the elastic deformation of the grounding ring 7, the inner flange 8 is caused to fall into the groove 6 by surmounting the circumferential flange 5 using the portion 8a as the final surmountable portion. As a result, the grounding ring 7 is rotatably attached to the lower end of the operating barrel 3 in such a manner that it cannot easily fall off due to the engagement of the two flanges 5 and 8.

In the state shown in the second figure, the caster 12 is inserted into the cylindrical body 1 and placed under the support leg 13, as shown by the chain line in the figure. In this state, since the cylinder body 1 and the operating cylinder 3 are deeply fitted, their overall height is sufficiently short compared to the height of the caster 12, and as a result, the cylinder body 1 and the operating cylinder 3 is in a state of play between the floor surface and the lower end of the supporting leg 13, and moves with the caster 12 without interfering with its movement.

As a result of this movement, when the cylinder body 1 and the operating cylinder 3 are rotated relative to each other after reaching the installation position, the screwed bodies 1 and 3 are mutually extended and their entire length is extended, and their upper and lower ends comes into contact with the floor surface and the lower end of the supporting leg 13. Furthermore, if this rotational operation is continued, these will push up the support leg 13 due to the continued extension, but at this time,
The wide flange 11 of the grounding ring 7 is in pressure contact with the floor surface, and the operation tube 3 does not come into direct contact with the floor surface, but instead is attached to the upper end or the wide flange 11 of the grounding ring 7, which has relatively low sliding resistance.
Since it is in contact with the top surface, it can be rotated easily and will not cause scratches on the floor surface.

By this operation, the caster 12 is lifted off the floor surface, the supporting leg 13 is stably fixed, and the stopper edge 9 of the operation tube 3 is fixed to the threaded part 2 of the tube body 1.
These cylinder body 1 and operation cylinder 3 within the range until reaching .
It is also possible to finely adjust the height of the supporting leg 13 by adjusting the amount of extension, that is, the height from the floor surface.

Effects of the invention As described above, according to the fixing device of the present invention, the cylinder body and the operation cylinder, which can be extended or retracted by screwing together, are attached to the end of the support leg so as to cover the existing caster part, so that movement is possible. By moving the caster without interfering with the movement of the caster in any way, and by extending both bodies at the installation position, it is possible to fix the support leg with the caster part floating, and when fixing it, it is possible to fix the support leg by rotating the operation tube and the floor surface. Since a grounding ring is interposed between the control tube and the control tube, the rotating operation of the operation tube is easy, and there is no scratching on the floor surface. Nevertheless, it has an excellent support leg fixing function, a leg height adjustment function, and also has a covering effect for the caster part, making it extremely useful in practical use.

In particular, according to the fixing device of the present invention, the cylindrical body is not attached to the support leg, but is simply arranged to surround the caster. so that it can be easily placed and used. In addition, since the inner circumferential diameter of the circumferential flange of the grounding ring is formed larger than the outer circumferential diameter of the circumferential flange of the operating tube in one area,
The circumferential flange of the ground ring can be made to ride over the circumferential flange of the operating tube, and the circumferential flange can be easily fitted into the circumferential groove of the operating tube. Furthermore, since the operation tube is provided with a tool insertion hole, even if there is a pinch between the supporting leg and the ground surface, or a considerable load is placed on the operation tube, making it difficult to rotate the operation tube, the tool can be easily inserted. Using tools can eliminate this inconvenience.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing one embodiment of the inventive fixture, Figs. 2 and 3 are vertical side views showing the usage state of the inventive fixture, respectively, and Fig. 4 is the grounding of the inventive fixture. FIG. 3 is a perspective view showing the main parts of the ring. 1...Cylinder body, 2...Screw thread, 3...Operation tube, 4...
... Spiral groove, 5 ... Circumferential flange, 6 ... Step groove, 7 ... Ground ring, 8 ... Inner tsuba, 8a ... Excised part, 9
...stopper rim, 11...wide tsuba rim.

Claims (1)

[Claim for Utility Model Registration] A cylindrical body 1 having a thread 2 on the lower outer periphery, a thread 4 threadedly engaged with the thread 2 on the inner periphery, a circumferential collar 5 on the outer periphery of the lower end, and a circumferential groove 6 on the upper outer periphery. an operation tube 3 having;
In a fixing device for a supporting leg with casters, which includes a grounding ring 7 having a circumferential groove 6 and a circumferential collar 8 rotatably fitted on the inner periphery of the upper end, the cylindrical body 1 is a large body that surrounds the caster 12 separately from the supporting leg 13. The screw groove 4 of the operating barrel 3 is provided leaving the upper end of the operating barrel 3 intact, the tool insertion hole 10 is provided in the middle part of the operating barrel 3, and the grounding ring 7 is made of synthetic resin and The inner diameter of the flange 8 is gradually expanded to the portion 8a from the vicinity thereof, and the circumferential flange 8 facing the portion 8a
The fixing device is characterized in that the diameter between the inner surface and the inner surface is larger than the outer circumferential diameter of the circumferential collar 5 of the operation tube 3.