JPS6345987Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to a telescoping pole in which an inner tube is slidably inserted into an outer tube and whose overall length can be changed. It is pressed into shape and installed and fixed, and is used for various purposes such as hanging shafts for clothes hangers and horizontal bars for mounting shelves.

BACKGROUND ART In general, this type of telescopic pole has an inner tube 2 slidably and rotatably inserted into an outer tube 1, as shown in FIG. A rotary operating tool 3 is attached, and elastic caps 4, 4 made of rubber or the like are fitted at both ends, and a locking mechanism 5 is provided at the insertion portion of the inner and outer tubes 1, 2. In use, the facing wall 6,
By setting the overall length of the elastic caps 6 so that both elastic caps 4, 4 are in approximate contact with each other, and then rotating the inner tube 2 with its grip portion 2a, the outer tube 1 and the inner tube are separated by the action of the locking mechanism 5. 2 are fixed in a non-slidable manner, and then the rotary operating tool 3 is rotated to the extension side, so that both ends are brought into pressure contact with the walls 6, 6 in a tensioned manner, and the construction is made. In addition, the rotary operating tool 3 is the outer tube 1.
It may also be provided at the side end.

In the case of such a telescoping pole, since the pressure contact force at both ends supports the load of suspended objects or objects placed on shelves, it can easily fall if the overall length changes due to deflection or vibration caused by this load. Therefore, the locking mechanism 5 is required to have a strong fixing force.
It is necessary to have a simple structure, low manufacturing and material costs, and reliable operation.

A typical example of the conventional locking mechanism 5 is a locking member in which a screw shaft is attached to one of the outer tube 1 and the inner tube 2 and a nut is attached to the other in a non-rotatable manner, and the screw shaft and the nut are connected to each other with an inclined surface. By screwing together the outer tube and the inner tube through the screw shaft and rotating the inner tube relative to each other in the tightening direction of the screw shaft and the nut, the locking member is eccentrically made using its inclined surface and pressed against the inner surface of the outer tube 1. (Utility Model Application No. 59-186510, Utility Model Application No. 60-8503, etc.), or similar screw shafts and nuts as described above are fixed by a locking member having a radial piece and a pressing member having a tapered surface. The radial piece of the locking member is pushed out in the circumferential direction by a pressing body by the same rotational operation as described above, and is fixed by pressing it against the inner surface of the outer tube 1 (Utility Model Publication No. 55-6554) etc.) are listed.

Problems to be solved by the invention However, in the former locking mechanism described above, the locking member is in pressure contact with the inner surface of the outer tube at only one location, so the fixing force is insufficient, especially in the pulling direction. There is a problem that the fixing force is weak. In addition, in the latter locking mechanism described above, the radial piece of the locking member is in elastic pressure contact with the inner surface of the outer tube, so if a strong force is applied, the radial piece may deform and slide. However, there is a problem in that the fixing force in the pulling direction is weak.

Therefore, this invention solves the above-mentioned conventional problems, and is equipped with a locking mechanism that has a strong fixing force in both pushing and pulling directions, and is a telescoping mechanism that has a simple structure, can be manufactured at low cost, and has reliable operability. The purpose is to provide poles.

Means for Solving the Problems The telescopic pole of this invention has the following objectives:
A plug body with a screw shaft fixed to the outer tube is fitted in a non-rotatable manner, and a plug body holding a nut in a non-rotatable manner is fixed to the insertion side end of the inner tube which is slidably and rotatably inserted into the outer tube. A pressure contact body made of a short cylinder having both end surfaces inclined parallel to the screw shaft is loosely fitted so as to be tiltable, and the screw shaft and the nut are screwed together, so that one of the outer tube and the inner tube is connected to the other. By rotating the screw shaft and the nut in the tightening direction relative to the other, the pressing body is compressed and tilted between the two plug bodies, and the acute-angled portions of both ends are pressed against the inner surface of the outer tube, causing it to be pushed out. The pipe and the inner pipe are fixed in a non-slidable manner.

Embodiments Hereinafter, this invention will be explained based on illustrated embodiments.

In FIGS. 2 to 4, 1 is an outer tube, and 2 is an inner tube, both of which are constructed in the same manner as in FIG. 1.

7 is a stopper made of a synthetic resin molded body, etc.;
A flange portion 7a is provided on one end side, and a cross-shaped split groove 8 with a depth slightly exceeding the flange portion 7a is formed from this end surface, and a bolt-shaped screw shaft 9 has its head 9a embedded in the other end side. By doing so, they are fixed coaxially. This plug body 7 has a flange portion 7 inside the outer tube 1 by utilizing the material elasticity of the split groove 8 portion.
The outer tube 1 is inserted by pressing the circumferential surface of the outer tube 1, and can be slid in the longitudinal direction of the outer tube 1 by a certain amount of external force. It is in a state where it cannot rotate easily.

Reference numeral 10 is a short cylindrical pressure contact member made of hardened steel or the like, and both end surfaces 10a, 10a are parallel surfaces inclined with respect to the axis, and an annular protrusion 10b is formed at the center of the inner surface. ing. This pressure contact member 10 has circular washers 11 and 1 located on both sides thereof.
1 and is loosely fitted onto the screw shaft 9 of the stopper 7 so as to be freely tiltable. Note that the annular protrusion 10b functions to prevent rattling due to eccentricity of the pressure contact member 10 under this loosely fitted state.

Reference numeral 12 denotes an annular stopper made of a synthetic resin molded body to which a nut 13 is fixed in a non-rotatable manner.By fitting an annular groove 12a provided on one side of the plug into the tip of the inner pipe 2, the inner pipe 2 It is fixed in such a way that it cannot be rotated or removed. The nut 13 is screwed onto the threaded shaft 9 of the stopper 7 in an assembled state in which the inner tube 2 is slidably and rotatably inserted into the outer tube 1. Therefore, the plug body 7, the pressure contact member 10, the washer 11,
11 slides on the outer tube 1 together with the inner tube 2.
Note that the tip 9b of the screw shaft 9 is crushed to prevent it from coming off. 14 is a synthetic resin annular protective cap fixed to the end of the outer tube 1.

In order to fix the outer tube 1 and the inner tube 2 when using the telescopic pole having the above structure, first, as shown in FIG. Outer pipe 1 and inner pipe 2
After the inner tube 2 is slid to a predetermined overall length, the inner tube 2 is rotated relative to the outer tube 1 in a direction in which the screw shaft 9 and the nut 13 are tightened. With this operation,
The pressure contact member 10 has washers 11 and 1 between both plug bodies 7 and 12.
1, and both end surfaces 10a, 10a
Since is a parallel inclined surface, it tilts as shown in Figure 4,
The acute-angled edges 10c, 10c at both ends are pressed against the inner surfaces of the outer tube 1 on both sides in the radial direction. Here, when an external force in the direction of contraction is applied to the telescopic pole, the acute-angled edge 10c of the pressure contact member 10 on the plug body 7 side acts to bite into the inner surface of the outer tube 1, and conversely, when an external force is applied in the direction of extension, the plug body 1
Since the acute-angled edge 10c on the second side similarly bites, the telescopic pole does not change its overall length when pushed or pulled in the installed state as shown in the first figure, and maintains a stable fixed state. There is no risk of it falling from the front wall 6, 6.

Note that the washer 11 in the above embodiment is the plug body 7,1
This is used to supplement the strength of the end face when the pressure contact member 10 is clamped between the two, but instead of using this washer 11, a metal plate is embedded or fixed integrally with the end face of the plug bodies 7 and 12. You can also use it as

Effects of the invention In the telescopic pole according to this invention, during use, the outer tube and the inner tube are fixed by pressure contact between the acute angle edges at both ends of the tilted pressure member and the inner surface of the outer tube, and the pressure contact portions are in two places. Moreover, since it is on both sides in the radial direction, the fixing force is large, and the fixing force functions against external forces applied in both directions of extension and contraction of the pole, thereby maintaining a firm erection state. In addition, since the tilting of the pressure contact member is based on the inclination of both end faces, this telescopic pole has a reliable fixing and unfixing operation, and is structurally simple, so there is no risk of failure. , which has the advantage of being able to be manufactured at low cost.

[Brief explanation of drawings]

Fig. 1 is a front view of the telescoping pole in use, Fig. 2 is an exploded, partially cutaway perspective view of the main parts of the telescoping pole according to an embodiment of this invention, and Fig. 3 is a main part of the telescoping pole of the same embodiment. FIG. 4 is an axial sectional view of the part in the unfixed state, and FIG. 4 is an axial sectional view of the part in the fixed state. 1... Outer tube, 2... Inner tube, 7... Stopper, 9...
Screw shaft, 10... pressure contact member, 10a... end surface, 1
0c...Sharp edge, 12...Bung body, 13...Nut.

Claims (1)

[Scope of utility model registration request] A plug body with a screw shaft fixed to the outer tube is fitted in a non-rotatable manner, and a plug body holding a nut in a non-rotatable manner is fixed to the insertion side end of the inner tube which is slidably and rotatably inserted into the outer tube. A pressure contact body made of a short cylinder having both end surfaces inclined parallel to the screw shaft is loosely fitted so as to be tiltable, and the screw shaft and the nut are screwed together, so that one of the outer tube and the inner tube is connected to the other. By rotating the screw shaft and the nut in the tightening direction relative to the other, the pressing body is compressed and tilted between the two plug bodies, and the acute-angled portions of both ends are pressed against the inner surface of the outer tube, causing it to be pushed out. A telescopic pole configured such that a pipe and an inner pipe are fixed in a non-slidable manner.