JPH07246142A - Expansible device for pillar - Google Patents

Abstract

PURPOSE:To provide an expansible device for a pillar, whose height can be adjusted in a one-touch manner and which can be certainly fixed. CONSTITUTION:An inside pipe 3 having a deformative member 4 in which a plurality of guide sections 5 are arranged, whose one end is open to the outer periphery surface and the other end is open to the bottom surface, is disposed so as to vertically move in an outer pipe 2. A shaft member 7 penetrating a through hole 6 of the deformative member 4 is arranged in the inner pipe 3 in a state such that the shaft member 7 is always energized upward. A support member 8 having pushing pins 9 energized upward by spring members 10 is disposed at the end of the shaft member 7. Spheres 14 are held in the guide sections 5 by the pushing pins 9. The pushing pins 9 push the spheres 14 along the guide sections 5 in association with the rise of the shaft member 7, a part of each of the spheres 14 is projected from the outer periphery surface of the deformative member 4, the spheres 14 are pressure-contacted with the inner rim surface of the outer pipe 2, thereby fixing the inner pipe 3 to the outer pipe 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telescopic device for a column in a hanger device for hanging clothes for display.

[0002]

2. Description of the Related Art For example, as a column used in a hanger device for clothes and the like, an inner pipe is vertically movably inserted into an outer pipe whose upper end is open in order to freely adjust the height, and a side wall of the outer pipe. A pillar having a structure in which the inner pipe is fixed to a free position by screwing the inner pipe with a screw penetrating therethrough has been known for a long time. However, while such a strut is extremely simple in structure, it causes an unforeseen accident due to the troublesome operation due to screwing and loosening of the screw during use. Therefore, in order to eliminate these problems,
A support column having a structure in which an adjustment fixing mechanism for the inner pipe is provided inside the outer pipe is disclosed in Japanese Utility Model Publication No. 54-32477 and Japanese Utility Model Publication No. 57-27.
It is proposed by Japanese Patent No. 336 or the like. In each of the stanchions disclosed in these publications, a plurality of spheres are evenly present between the outer pipe and the inner pipe, and the spheres are forcibly fitted into the gap between them to fix the inner pipe at an arbitrary expansion / contraction position. It is what makes me.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In each of the stanchions disclosed in Japanese Patent No. 2477 and Japanese Utility Model Publication No. 57-27336, if the gap between the outer pipe and the inner pipe is not constant, spheres with play will occur in the spheres that are evenly arranged. There was a problem that the inner pipe wobbled due to the imbalance of the holding force by the sphere, and the predetermined load resistance could not be maintained. The main cause is that even if the dimensions of each inner and outer pipe to be used are made within the official tolerance, when inserting the inner pipe into the outer pipe, there is already a deviation of the circle center within this official tolerance, especially for welded pipes, etc. In the above, due to the unevenness or the like generated on the weld bead surface, a sphere that cannot actually perform the above-mentioned fixing function is generated. Therefore, in order to prevent such a play from occurring in the sphere, it is necessary to make the sizes of the inner and outer pipes and the respective parts of the related holding mechanism considerably strict.

In view of the present situation, even if the pipes forming the stanchions have some dimensional error or the wear caused by use causes an error, the outer pipe and the inner pipe forming the stanchions are separated from each other. The purpose of the present invention is to provide an extension / contraction device for a column that can reliably hold the engagement.

[0005]

In order to achieve the above-mentioned object, an apparatus for expanding and contracting a strut according to the present invention comprises an outer pipe having an open upper end, an inner pipe for sliding the outer pipe up and down, and an inner pipe. A shaft member that penetrates the inside and holds a predetermined raised position with respect to the inner pipe by a spring member built in the inner pipe, and that is configured by a shaft member that descends predetermined by pressing, Has a through-hole through which the shaft member passes, and integrally forms a deformed member in which a plurality of guide portions that evenly slope outwardly from the vicinity of the lower end of the through-hole and that communicate with the outer surface are formed. At the lower end of the shaft member that penetrates through the through hole of the profile member, a support member that integrally supports a push-up pin that is projected and retracted in the guide portion by a spring member is integrally formed, and the support member at the raised position of the shaft member Push-up pin in front To correspond to the guide portion pushed up along the spheres disposed in the guide portion, and is characterized in that for pressing the respective spheres on the inner peripheral surface of the outer pipe.

In the present invention, the engagement and holding of the inner pipe with the outer pipe is carried out by a spherical body, but the guide portion for holding the spherical body is a through hole communicating from the lower end of the profiled member to the outside. Good. Further, the guide portion may be a concave groove formed on the inclined outer surface of the profiled member, and in any case, the through hole or the concave groove guides the movement of the sphere and does not move out of a predetermined position. Any structure is acceptable.

[0007]

In the telescopic device of the present invention, a plurality of guide portions are evenly provided on the deformed member provided at the lower end of the inner pipe, spheres are arranged on these guide portions, and a shaft provided through the inner pipe. Each push-up pin independently supported by a support member connected to the lower end of the member via a spring pushes up and moves the sphere along the guide portion, so that the sphere comes into pressure contact with the inner peripheral surface of the outer pipe to move the inner pipe. It is held at a predetermined position. At that time, even if there is some gap between the inner and outer pipes, the push-up pins independently supported by the springs are surely pressed against the outer pipes by the elasticity of the springs in accordance with the size of the gaps. Therefore, the inner pipe can be strongly and reliably held at the predetermined rising position with respect to the outer pipe without causing play in the spherical body.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a strut expanding / contracting device of the present invention will be specifically described below with reference to the accompanying drawings. The propeller expansion / contraction device 1 according to the present invention includes an outer pipe 2 having an open upper end, an inner pipe 3 inserted through the upper open end of the outer pipe 2 to freely move up and down in the outer pipe 2, and the inner pipe. The shaft member 7 is elastically mounted in the shaft 3, and the support member 8 and the spherical body 14 are attached to the tip of the shaft member 7.

The outer pipe 2 is open at least at its upper end. For example, in a hanger device for suspending clothes or the like, fixed legs having casters in a radial pattern (not shown) are integrally provided in the lower end thereof in a horizontal state. It is provided in.

The inner pipe 3 has an open upper end and an outer diameter that is substantially the same as or slightly smaller than the inner diameter of the outer pipe 2. In the hanger device for suspending clothes and the like, the outer peripheral portion thereof. An arm for suspending the hanger is integrally attached to an appropriate position of the. This inner pipe 3 is integrally provided with a cylindrical deformed member 4 having a through hole 6 formed at the center at the lower end, and a through hole 12a at the center at the inner peripheral wall of a proper depth from the upper end opening. The partition wall 12 forming the is integrally provided.

On the outer peripheral portion of the deformed member 4 formed integrally with the lower end of the inner pipe 3, four guide portions 5, 5, 5, whose base ends are evenly opened to the bottom surface of the deformed member 4. The tip of 5 is open. That is, the guide portion 5 is composed of a through hole that moves with a spherical body 13 which will be described later present inside, and rises outward from the bottom surface near the lower end of the through hole 6 provided in the center of the deformable member 4. It is inclined at an inclination and opens to the outer surface of the deformed member 4.

The shaft member 7 moves up and down in the inner pipe 3 by penetrating the through hole 12a of the partition wall 12 and the through hole 6 of the deformed member 4, and the tip end thereof projects into and out of the upper end portion of the inner pipe 3. A flexible pressing member 11 is integrally provided with a disk-shaped support member 8 at its lower end, and a compression member for constantly urging the shaft member 7 upward between the partition wall 12 and the pressing member 11. A spring member 13 composed of a spring is interposed. Therefore, since the upper surface of the support member 8 integrally provided at the lower end portion is always in contact with the lower surface of the deformed member 4, the shaft member 7 is not separated from the inner pipe 3.

A groove 10a having a predetermined depth is formed on the upper surface of the support member 8 at a position corresponding to the guide portion 5 opening to the bottom of the deformable member 4, and the groove 10a is formed in the groove 10a. A spring member 10 composed of a compression spring is provided, and a rod-shaped push-up pin 9 is integrally attached to the tip of this spring member 10. Therefore, when the load is applied to the spring member 10, the push-up pin 9 is sunk into the recessed groove 10a, and when the load is not applied, the tip of the push-up pin 9 always keeps protruding from the recessed groove 10a.

The spherical body 14 is such that a part of its spherical surface can project from the guide portion 5 opening to the outer peripheral portion of the deformable member 4, and is engaged and held so as not to be separated from the guide portion 5. The movement is controlled by the push-up pin 9 provided on the support member 8. That is, the spherical body 14 in the guide portion 5 is supported by the upper end portion of the push-up pin 9 and held in the guide portion 5, and the push-up pin 9 is held.
The sphere 14 is guided by the inclined guide portion 5 to move toward the outer side surface of the deformable member 4 by the ascending.

As shown in FIGS. 1 and 2, the support device 1 having such a structure has a pressing member 11 pressed down against the urging force of a spring member 13 formed of a compression spring, that is, a pressing member. In the state where the member 11 is largely immersed in the upper end portion of the inner pipe 3,
Since the shaft member 7 is also in the lowered state, the disk-shaped support member 8 integrally provided at the lower end is also located at the lowermost end. Therefore, the spherical body 14 provided inside the guide portion 5 of the deformed member 4 formed at the lower end portion of the inner pipe 3 has the push-up pin 1 provided at the support member 8 in a state of being located at the lower end portion of the guide portion 5.
Since it is supported by 0, there is a slight gap between the inner pipe 3 and the outer pipe 2. Therefore, since the inner pipe 3 can be easily slid up and down along the outer pipe 2, the inner pipe 3 can be set to a predetermined height.

Then, when the pressure on the pressing member 11 is released while the inner pipe 3 is held at a desired height with respect to the outer pipe 2, the pressing member 11 is pushed upward by the urging force of the spring member 13. As a result, the pressing member 11
The shaft member 7 integrated with the shaft member 7 also rises in the inner pipe 3, and the support member 8 connected to the lower end of the shaft member 7 also rises. At the same time, the push-up pin 9 provided on the support member 8 also rises along the guide portion 5. Therefore, when the spherical body 14 in the guide portion 5 is pushed up above the guide portion 5 and the upper surface of the support member 8 contacts the bottom surface of the deformed member 4 of the inner pipe 3, the shaft member 7 stops rising.
Therefore, in the spherical body 14 that has risen in the guide portion 5 by the push-up pin 9, a part of the spherical surface projects from the opening of the outer peripheral surface of the deformable member 4, and the state in which the spherical surface is pressed against the inner peripheral surface of the outer pipe 2 is maintained. The inner pipe 3 is fixed to the outer pipe 2 at that position.

At this time, the pressure contact position of the spherical body 14 differs due to the dimensional difference caused by the molding of the outer pipe 2 and the inner pipe 3 including the deformed member 4. Therefore, in the case where each push-up pin is integrally fixed to the support body, it is not possible to cope with the different pressure contact positions, and even if a certain sphere surely maintains the pressure contact state, There may be a case where the state of pressure contact with the inner peripheral surface of the outer pipe is reduced, or there is no pressure contact. Such a phenomenon occurs even if the dimensions of the inner and outer pipes are within the allowable tolerances. Further, it naturally occurs even if the pipe is a welded pipe having a bead surface. Further, this phenomenon is also caused by a deviation in accuracy due to improper handling as a column, and wear due to increased use frequency.

However, the strut expansion / contraction device 1 of the present invention has a spring member composed of a compression spring in which the push-up pin 9 for controlling the spherical body 14 in the guide portion 5 is elastically mounted in the groove 10a provided in the support member 8. Since they are independently supported by the spring members 10, as is apparent from FIG. 3, even if there is a difference in the gap between the outer pipe 2 and the inner pipe 3 including the deformed member 4, the spring member 10 Due to the elasticity of, the part of the spherical body 14 is surely brought into pressure contact with the inner peripheral surface of the outer pipe 2, and the engaged state between the inner pipe 3 and the outer pipe 2 can be reliably maintained.

When it is desired to change the height of the inner pipe 3, as described above, the pressing member 11 is pushed down to eliminate the pressure contact between the spherical body 14 and the inner peripheral surface of the outer pipe 2 and the above-mentioned FIGS. By setting the state to 2, the inner pipe 3 is free from the outer pipe 2, and the height of expansion and contraction can be easily changed in the above-described manner.

[0020]

In the apparatus for expanding and contracting a strut according to the present invention, a plurality of guide portions having one opening provided at a position opposed to the inner peripheral surface of the outer pipe are evenly provided in the deformed member provided at the lower end of the inner pipe. , A spherical body is arranged in each of these guide portions, and the spherical body is connected to the lower end of a shaft member that penetrates through the inner pipe. When the shaft member rises, the push-up pin enters the guide part, pushes up the sphere upward, and part of the sphere projects from the guide part, so that the sphere and the inner peripheral surface of the outer pipe are in pressure contact. , So that the inner pipe is fixed to the outer pipe.
At that time, since the push-up pins are independently supported by the support member by the spring members, the push-up pins are biased by the spring members even with respect to different gaps due to molding errors of the inner and outer pipes, Part of the sphere is projected from the guide part to securely hold the inner peripheral surface of the outer pipe in a pressure contact state, and firmly and securely place the inner pipe in a predetermined rising position with respect to the outer pipe without causing play to the sphere. It is something that can be retained. Therefore, with the support device for the push-up pin of the present invention, the support structure of the push-up pin automatically corrects the imbalance of the sphere caused by the accuracy error caused by the improper handling of the support and the wear caused by the increased use frequency. It has a great advantage in practical use that it can be straightened and used for a long period of time, and that it has a simple structure and is easy to handle.

[Brief description of drawings]

FIG. 1 shows an embodiment of a telescopic device for a strut according to the present invention,
It is a partial longitudinal cross-sectional view showing a state in which the outer pipe and the inner pipe that form the support column are free.

FIG. 2 is a cross-sectional view taken along the line AA in FIG.

FIG. 3 is a partial vertical cross-sectional view of the inner pipe fixed to the outer pipe at a predetermined position.

4 is a cross-sectional view taken along the line BB in FIG.

[Explanation of symbols]

 1 Strut expansion / contraction device 2 Outer pipe 3 Inner pipe 4 Deformed member 5 Guide portion 6 Through hole 7 Shaft member 8 Support member 9 Push-up pin 10,13 Spring member 11 Pressing member 14 Sphere

Claims (2)

[Claims] 1. An outer pipe having an open upper end, an inner pipe that slides up and down the outer pipe, a penetrating inside of the inner pipe, and a predetermined rising position with respect to the inner pipe by a spring member incorporated in the inner pipe. And a shaft member that descends by a predetermined amount by pressing,
The inner pipe has a through hole through which the shaft member penetrates, and a plurality of guide portions which are inclined from the vicinity of the lower end of the through hole to the outside and incline at an upward slope to communicate with the outer side surface are uniformly formed. A member is integrally provided, and at the lower end of the shaft member that penetrates the through hole of the deformed member, a support member that integrally supports a push-up pin that is projected and retracted in the guide portion by a spring member is integrally formed. A support column expansion / contraction device characterized in that the push-up pin of the support member pushes up a spherical body arranged corresponding to the guide portion along the guide portion, and presses each spherical body against the inner peripheral surface of the outer pipe. 2. The deformed member has a cylindrical shape as a whole, has a through hole for allowing the shaft member to penetrate therethrough in a central portion, has an opening at one end on an outer surface and an opening at the other end on a bottom surface. The support device according to claim 1, characterized in that a plurality of cylindrical guide members that are open at the same position are evenly provided.