JP2001112602A - Prop - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive prop which improves its assembling work efficiency to reduce the labor for a fixing process and to reduce a working cost by providing the structure of the prop for simply and efficiency fixing an outer pipe and a compression coil spring. SOLUTION: This prop comprises an outer pipe 1, an inner pipe 2 to be inserted in it and a compression coil spring 3 to be inserted in the pipe 2. A fixing part 4b obtained by increasing a coil diameter is formed at one end of the spring 3, and one end part of the pipe 1 has an insert-holding part 6 formed at a position equivalent to the part 4b and inserts and holds the part 4b to fix the pipe 1 and the spring 3. Then, by rotating the pipe 2 forward and backward while engaging an engager 7 projectingly formed in the direction of the inside diameter of the pipe 2 between the pitches of the fixed spring, the pipe 2 is moved back an forth in a longitudinal direction to vary the whole length.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stay rod used for hanging a clothes hanger or a towel, and more particularly, a state in which a wall such as a room or a shelf is shortened in a longitudinal direction at a place where walls are opposed to each other. And a strut which is fixed by being pushed between the walls by the elastic force of a compressed spring.

[0002]

2. Description of the Related Art As shown in FIG. 3, a conventional strut is composed of an outer tube (1), an inner tube (2) inserted therein, and a compression coil spring (3) inserted through the inner tube (2). ), One end of a compression coil spring (3) housed in the outer tube (1) is fixed to the outer tube (1), and an engaging element (7) projecting radially inside the inner tube (2) is attached. By twisting the inner pipe (2) in the forward and reverse directions while engaging the pitch between the fixed compression coil springs (3), the inner pipe (2) is advanced and retracted in the longitudinal direction to change the overall length. is there.

[0003] One end of the compression coil spring (3) is fixed so as not to be pulled out from the inside of the outer tube (1) or rotated, but as a means for fixing the compression coil spring (3), the end of the compression coil spring (3) is used. A small loop hook (9) is formed on the outer tube (1) to stand up in the axial direction, and at one end of the outer tube (1), a through hole (11) penetrating in the diametrical direction is formed. A screw or a pin (hereinafter referred to as “pin etc. (10)”) is attached to the loop hook (9).
The compression coil spring (3) to the outer tube
(1) Means for fixing inside are used.

[0004]

However, in the above-mentioned means for fixing the compression coil spring (3), the pin or the like (10) passes through the loop hook (9) formed at the end of the compression coil spring (3). It is necessary to align the center of the loop hook (9) with the center of the through hole. If this position is slightly deviated, the pin (10) does not penetrate the loop hook (9) and the compression coil spring (3)
Cannot be fixed in the outer tube (1). For this reason, it is necessary to confirm that the compression coil spring (3) is arranged at a predetermined position (axial direction) and orientation (rotation direction) in the fixing process. Since it is necessary to inspect whether the coil spring (3) is fixed, there is a problem that it is troublesome to confirm twice, and the efficiency of assembling the stay rod is reduced.

In the fixing means, a through-hole (11) is formed at the end of the outer tube (1), or after the pin (10) is penetrated, the pin (10) is removed. Work such as caulking the end is necessary to prevent the detachment, and the process of fixing the stay rod requires a lot of trouble, resulting in an increase in cost.

Accordingly, the present invention provides a structure of a strut which can easily and efficiently fix the outer tube and the compression coil spring, thereby improving the work efficiency of assembling the strut and reducing the number of fixing steps. Another object of the present invention is to provide an inexpensive stay rod by reducing the processing cost.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and comprises an outer tube, an inner tube inserted therein, and a compression coil spring inserted through the inner tube. Then, one end of the compression coil spring in the outer tube is fixed to the outer tube, and the inner tube is rotated in the forward and reverse directions while engaging an engaging member projecting radially inside the inner tube between the pitches of the fixed compression coil spring. By doing so, in a strut rod that advances and retreats the inner tube in the longitudinal direction and changes the total length, a fixing portion having an increased winding diameter is formed at one end of the compression coil spring, and the fixing portion of the one end of the outer tube is fixed. A holding bar is formed on the outer tube and the compression coil spring by fixing the fixing portion by forming a holding portion at a position corresponding to the portion.

[0008] The holding portion may be one or a plurality of caulked portions by pressing means, or a portion partially reduced in diameter by using drawing means.

Further, the fixing portion formed at one end of the compression coil spring may be formed to be longer than the length of the gradually increasing portion.

[0010]

According to the above-described extension rod according to the present invention, a fixing portion (4b) having an increased winding diameter is formed at one end of the compression coil spring (3) to form the outer tube (1). The compression coil spring (3) is inserted through the outer tube (1), and the outer tube (1) is plastically deformed in the radial direction at a position corresponding to the fixing portion (4b) to form a holding portion (6). 6) Fixing part of compression coil spring (3) with (4b)
By fixing the position (axial direction) of the fixing part (4b) of the compression coil spring (3), it can be fixed regardless of the direction (rotation direction), eliminating the need for position confirmation in the fixing process. Become. Therefore, only the inspection after the fixing step needs to be performed, and the trouble of confirming twice can be avoided, and the efficiency of assembling the stay rod can be improved.

When the compression coil spring (3) is fixed, the outer tube corresponding to the fixing portion (4b) of the compression coil spring (3) is used.
The peripheral surface of (1) may be plastically deformed by pressing, and as in the fixing means using pins (10), drilling of through holes (11), crimping of pin ends, and compression coil springs (3) Since it is not necessary to form the loop hook (9) at the end, the number of steps required for the step of fixing the stay rod can be reduced.

In particular, by partially reducing the diameter of the holding portion (6) using one or more caulking portions by pressing means or by using drawing means, the fixing portion (4b) can be surely secured in the radial direction. Can be compressed and fixed.

Further, since the fixing portion (4b) formed at one end of the compression coil spring is formed longer than the length of the gradually increasing portion (4a), positioning for forming the holding portion (6) becomes easy. Thus, the compression coil spring (3) can be securely fixed to the outer tube (1). Also, by making the gradually increasing portion (4a) shorter than the holding portion (4b), the holding portion (6) can be more externally compared with the case where the length of the gradually increasing portion (4a) and the holding portion (4b) are the same. It can be formed at the end of the tube (1), and can conceal the holding portion (6) to improve the appearance appearance without increasing the length of the end cap (8) attached to the end.

As described above, the outer tube (1) and the compression coil spring
(3) Providing a structure of a strut that can easily and efficiently fix the strut, improving the efficiency of assembling the strut and reducing the number of fixing steps, reducing the cost and reducing the cost of the strut Bars can be provided.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a strut according to an embodiment of the present invention. FIG. 1 is a cross-sectional view of a strut excluding a compression coil spring (3).
FIG. 2 is a side view showing a part of a long spring forming the compression coil spring (3).
It can be expanded and contracted between 0cm, outer tube (1), inner tube (2)
Both use aluminum tubes.

The outer diameter of the inner pipe (2) is slightly smaller than the inner diameter of the outer pipe (1), and the inner pipe (2) can be inserted into the outer pipe (1). On the other hand, the total length of the compression coil spring (3) is
And a guide portion (5) having a winding diameter that can be inserted into the inner tube (2), and a guide portion (5) connected to one end thereof.
And a fixing portion (4b) having a diameter larger than the winding diameter.

The compression coil spring (3) is inserted into the outer tube (1), and the fixing portion (4b) of the compression coil spring (3) is connected to the outer tube (1).
The outer tube (1) is partially plastically deformed in the radially reduced direction at the end to form a holding portion (6), thereby forming the compression coil spring (3) inside. Fasten the fixing part (4b). Although the shape of the holding portion (6) is not particularly limited, for example, one or a plurality of caulking portions may be formed on the outer tube (1) by using a pressing means to fix the fixing portion (4b), or (1) may be partially reduced in diameter using drawing means, so that the periphery of the fixing portion (4b) may be entirely retained.

An engaging element (7) is provided radially inside the inner pipe (2).
The inner tube (2) rotates along with the spiral of the compression coil spring (3) by rotating while engaging with the pitch from the end of the guide portion (5) of the compression coil spring (3). ) And rotated in the opposite direction, the inner tube (2)
(1) It is possible to go outside and change the overall length of the stay bar.

At both ends of the rod, the cut surface of the tube is covered to protect the abutting portion, and when the rod is used between walls, the rod is more strongly fixed by frictional force. Attach an end cap (8) made of a flexible material with a large coefficient of friction such as synthetic rubber. As described above, the end cap (8) is provided on the outer tube (1) side.
It also has the effect of coating (6) to maintain good appearance.

In the case of the present embodiment, as shown in FIG. 2, the compression coil spring (3) has a fixing portion (4b) and a gradually increasing portion.
A long spring in which a spindle-shaped part composed of (4a) and a part serving as a guide part (5) are alternately formed is manufactured, and this is taken along the line AA and B in the figure, which are one end of the spindle-shaped part. -Cut along the line B to obtain the compression coil spring (3).

The gradually increasing portion (4a) gradually increases from the winding diameter of the guide portion (5) to the winding diameter of the fixing portion (4b). The cutting position is one end of the spindle-shaped portion as described above. That is, cutting is performed on the AA line or the BB line having the winding diameter of the guide portion (5). Therefore, the fixing part (4b) of the compression coil spring (3)
At the end of the outer tube (1)
Insert the compression coil spring (3) into the outer tube (1)
The position of forming the fixed part (4b) avoiding this gradually increasing part (4a)
Do with. In addition, if the gradually increasing portion (4a) is long, the position where the holding portion (6) is formed moves away from the end of the outer tube (1), and the short end cap is formed.
In (8), the end cap (8a) cannot be covered, and if the end cap (8) is covered with a long end cap (8), the material cost increases. Therefore, it is desirable that the gradually increasing portion (4a) is as short as possible.

The strut described above is not limited to the above embodiment, and it goes without saying that the dimensions, shape, and material can be appropriately changed according to the purpose of use and the state of use.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a strut bar other than a compression coil spring (3) cut in a longitudinal direction.

FIG. 2 is a side view showing a part of a long spring forming a compression coil spring (3).

FIG. 3 is a cross-sectional view of a conventional strut bar except for a compression coil spring (3) cut in a longitudinal direction.

[Explanation of symbols]

 (1) Outer pipe (2) Inner pipe (3) Compression coil spring (4a) Increasing part (4b) Fixing part (5) Guide part (6) Nipping part (7) Engagement element (8) End cap (9) Loop Hook (10) Pin etc. (11) Through hole

Claims (3)

[Claims] An outer tube (1), an inner tube (2) inserted therein, and a compression coil spring (3) inserted in the inner tube (2), wherein the compression in the outer tube (1) is performed. One end of the coil spring (3) is fixed to the outer tube (1), and an engaging element (7) projecting radially inside the inner tube (2) is engaged between the pitches of the fixed compression coil spring (3). By rotating the inner pipe (2) forward and reverse while
In the case of a strut rod that moves the inner tube (2) in the longitudinal direction and changes its total length, a fixing portion (4b) with an increased winding diameter is formed at one end of the compression coil spring (3), and the outer tube (1 ) At one end of the fixing part (4
b) forming a clamping portion (6) at a position corresponding to the fixing portion (4b);
A strut bar characterized by fixing the outer tube (1) and the compression coil spring (3) by fastening the outer tube. 2. The strut according to claim 1, wherein the holding portion is formed by one or a plurality of caulking portions formed by pressing means or partially reduced in diameter by using drawing means. rod. 3. The compression coil spring (3) according to claim 1, wherein the fixing portion (4b) formed at one end of the compression coil spring (3) is formed longer than the length of the gradually increasing portion (4a). Struts.