JPH0334117Y2 - - 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 operation tool 3 is the outer cylinder 1.
It may also be provided at the side end.

In the case of such a telescopic pole, since it supports the load of suspended objects or objects placed on shelves with only the pressure contact force at both ends, it is easy to change the overall length due to deflection or vibration caused by this load. Since the locking mechanism 5 will fall, a strong fixing force is required, and on the other hand,
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 of one of the outer tube 1 and the inner tube 2 is non-rotatably attached to the other, and a nut is attached to the screw shaft and the nut with one side inclined. 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 the screw shaft and nut similar to the above are combined with 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. etc.).

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.
Also, like the former, there is a problem 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. , one place of a wide ring having an outer diameter larger than the inner diameter of the outer tube is cut diagonally across both end faces, and under normal conditions, the cut surfaces are in a misaligned state where the diameter is smaller than the original diameter of the ring. The screw shaft and the nut are screwed together through a spring washer-shaped pressure ring, and one of the outer tube and the inner tube is rotated relative to the other in the tightening direction of the screw shaft and the nut. By doing so, the pressure ring pressed between the two plug bodies expands in diameter and comes into pressure contact with the inner surface of the outer tube, so that the outer tube and the inner tube are fixed in a non-slidable manner. be.

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 circular 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-like screw shaft 9 is provided on the other end side with its head 9a. By implanting it, it is fixed coaxially. This plug body 7 is fitted into the outer tube 1 by pressing the circumferential surface of the flange portion 7a into contact with the circumferential surface of the flange portion 7a by utilizing the material elasticity of the split groove 8 portion, and is pushed in the longitudinal direction of the outer tube 1 by a certain amount of external force. Although it is slidable, the peripheral surface resistance of the flange portion 7a and the split groove 8
The edges of the blade prevent it from rotating easily.

Reference numeral 10 is a pressure ring made of steel or the like, in which a wide circular ring having an outer diameter larger than the inner diameter of the outer tube 1 is cut diagonally across both end surfaces 10a, 10a, and under normal conditions, the cut surfaces 10b, 10b are formed. is formed into a spring washer shape in which the outer diameter is smaller than the original diameter of the annular ring and the outer diameter is smaller than the inner diameter of the outer tube 1. This pressure contact ring 10 is slidably and loosely fitted onto the threaded shaft 9 of the plug body 7, together with circular washers 11, 11 located on both sides thereof.

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 ring 10, and the washer 1
1 and 11 slide 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. After sliding the outer tube 1 and the inner tube 2 at the bottom to obtain a predetermined total length, the inner tube 2 may be rotated relative to the outer tube 1 in the direction in which the screw shaft 9 and the nut 13 are tightened. . By this operation, the pressure ring 10 is moved between the two plug bodies 7 and 12 with the washer 1
1 and 11, and the oblique cut surface 10
As a result of the deformation so as to eliminate the positional deviation of the press ring 10, that is, the deformation so as to expand the diameter, the edge portions 10c and 10 at both ends of the pressure contact ring 10 are deformed as shown in FIG.
c comes into pressure contact with the inner surfaces of the outer tube 1 on both radial sides. Here, when an external force is applied to the telescopic pole in the direction of shortening, the edge portion 10c of the pressure ring 10 on the plug body 7 side
conversely, when an external force in the direction of extension is applied, the edge portion 10c on the plug body 12 side acts to bite in the same way, so the telescopic pole can be pushed in the installed state as shown in the first figure. There is no change in the overall length when pulled, and a stable fixed state is maintained, so there is no risk of falling from the walls 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 press ring 10 is sandwiched 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, the outer tube and the inner tube are fixed during use by pressure contact between the edge portions at both ends of the pressure contact ring with an enlarged diameter and the inner surface of the outer tube, and the pressure contact portions are at two locations. 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 the direction of extension and contraction of the pole, thereby maintaining a firm erection state. In addition, in this telescopic pole, the fixing action by the pressure ring is based on the material elasticity of the spring washer structure, so the fixing and unfixing operations are reliable.
Since it is structurally simple, there is no risk of failure, and it has the advantage that it can be manufactured at low cost.

[Brief explanation of the drawing]

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 non-sectional view of the telescoping pole of the same embodiment. FIG. 4 is an axial cross-sectional view in the fixed state. 1... Outer tube, 2... Inner tube, 7... Stopper, 9...
Screw shaft, 10... pressure contact ring, 10a... end face,
10b... cut surface, 12... plug 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. , one place of a wide ring having an outer diameter larger than the inner diameter of the outer tube is cut diagonally across both end surfaces, and under normal conditions, the cut surfaces are in a misaligned state where the diameter is smaller than the original diameter of the ring. The screw shaft and the nut are screwed together through a spring washer-shaped pressure ring, and one of the outer tube and the inner tube is rotated relative to the other in the tightening direction of the screw shaft and the nut. The telescopic pole is configured such that the pressure ring clamped between the two plug bodies expands in diameter and presses against the inner surface of the outer tube, thereby fixing the outer tube and the inner tube in a non-slidable manner. .