JP3039650U - Fixed structure for telescopic pipes - Google Patents

Abstract

(57) [Abstract] PROBLEM TO BE SOLVED: To provide a fixing structure of a telescopic pipe which is easy to use regardless of whether the user is right-handed or left-handed. SOLUTION: This is a fixing structure for a telescopic pipe used for fixing the entire length of the telescopic pipe formed by combining a large diameter pipe (A) and a small diameter pipe (B) to an arbitrary length. A fixture is attached to one end of the small-diameter pipe (B) on the side located in the large-diameter pipe (A). The fixing tool is a tapered screw part (2) formed so that the diameter of the center part is smaller than the diameters of both ends.
And a ring-shaped member (3) which is attachable to the taper screw part (2) and which has elasticity and is partially separated.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a fixing structure for expanding and contracting to fix a pipe whose length can be adjusted to an arbitrary length.

[0002]

[Prior art]

 Pruning scissors and saws with stretchable pipes are used to trim the branches of trees in high positions so that the length can be adjusted. In addition, there are some insect nets that use a retractable pipe as a handle.

Such a telescopic pipe is provided with two pipes having different diameters, and has a structure in which a small diameter pipe is inserted inside a large diameter pipe. Then, when increasing the overall length, make sure that there are few overlapping portions of each pipe (so that a large number of small diameter pipes protrude from a large diameter pipe). On the other hand, when shortening the overall length, the pipes should overlap with each other at many points.

It is necessary to fix these telescopic pipes to an arbitrary length at the time of use, and there are various fixing structures, but the ones described in Japanese Utility Model Application Laid-Open No. 151916/1979 are generally used. is there. This is as shown in FIGS. 3 and 4, where (A) is a large diameter pipe and (B) is a small diameter pipe. (C) is a cap for preventing the small diameter pipe (B) from coming off from the large diameter pipe (A) and preventing rattling of the small diameter pipe (B).

Reference numeral (11) is an insertion portion that is inserted into the end portion of the small diameter pipe (B). (12) is a tapered screw part integrally molded with the insertion part. (13) is a ring-shaped member having elasticity, which is "C-shaped" like a spring washer (that is, not a simple ring but a part thereof is cut off), and the screw of the taper screw part (12) is The shape is twisted according to the pitch.

(14) is a retainer for preventing the ring-shaped member (13) from falling off from the tapered screw portion (12), and (14a) is the ring-shaped member (13) most retained (14). It is an end point portion that contacts the end portion of the ring-shaped member (13) when moved to the () side and prevents the ring-shaped member (13) from moving further.

[0007] The fixing member including the insertion portion (11), the tapered screw portion (12), the ring-shaped member (13) and the retaining member (14) is made of synthetic resin.

When used as a handle, a large-diameter pipe (A) is usually used at the hand side, so when the handle is expanded and contracted to adjust the length, the left hand can be used to reduce the diameter. Hold the pipe (B) and rotate the large diameter pipe (A) at your hand with your right hand.

When the large-diameter pipe (A) is rotated clockwise (right-hand screw direction) when viewed from the hand side, the ring-shaped member (13) has a relatively larger diameter of the taper screw part (12). As a result, the ring-shaped member (13) is pressed by the tapered screw portion (12) from the inside.

Then, the ring-shaped member (13) is deformed so as to expand outward (increase in diameter), and the contact pressure with the inside of the large diameter pipe (A) increases. Then, the small-diameter pipe (B) connected to this fixture cannot move in the large-diameter pipe (A), and the pipe position is fixed.

On the contrary, when the large diameter pipe (A) is rotated counterclockwise (in the left-hand screw direction), the contact pressure between the ring-shaped member (13) and the inside of the large diameter pipe (A) becomes small, and the fixing is loose. You can extend and retract the pipe to any position with.

[0012] To prevent the handle from loosening and shrinking during work, the fixture must be tightly tightened until it stops rotating. However, when turning clockwise, it is easy for a right-handed person to apply force, but a left-handed person does not. To make it easier for left-handed people to use, the screw groove should be turned in the opposite direction, but this makes it difficult for right-handed people.

It may be possible to prepare two types, one for right-handed and one for left-handed, and to use the one that is easier to use. However, as the number of product types increases, production efficiency decreases at manufacturers and inventory management at stores. It becomes difficult to remove. In addition, there are cases where right-handers and left-handers are mixed in the family of purchasers, but it is not economical to purchase both types.

[0014]

[Problems to be solved by the device]

 Therefore, there is a need for a telescopic pipe fixing structure that is easy to use regardless of whether the user is right-handed or left-handed.

[0015]

[Means for Solving the Problems]

 The fixing structure for the telescopic pipe of the present invention is a telescopic pipe used for fixing the entire length of the telescopic pipe composed of the large diameter pipe (A) and the small diameter pipe (B) to an arbitrary length. In the fixing structure for the pipe, a fixing tool is attached to one end of the small-diameter pipe (B) located in the large-diameter pipe (A), and the fixing tool has a central part whose diameter is at both ends. It has a taper screw part (2) formed to be thinner than the diameter and a ring-shaped member (3) which is attachable to the taper screw part (2) and which is partially separated and has elasticity. Is characterized by.

[0016]

[Embodiment of the invention]

 Hereinafter, the present invention will be described using preferred embodiments. [Embodiment] FIG. 1 is a view showing a fixture used in the present invention, and FIG. 2 is a view showing a fixing structure of the present invention using the fixture.

(1) is an insertion portion for inserting the fixing tool to the small diameter pipe (B) by inserting it into the end of the small diameter pipe (B), and (3) is a ring-shaped member. These functions and shapes are the same as the conventional example. (3a) is a notch provided so that the ring-shaped member (3) is easily deformed to the outside.

The taper screw part (2) is largely different from the conventional one, in which the diameter near the center is the smallest and the diameter becomes larger toward both ends (just like connecting the upper surfaces of the truncated cones). It is the outer shape). (2a) is a screw groove of the tapered screw part (2), and the ring-shaped member (3) is rotated so that either end of the tapered screw part (2) is moved along the screw groove (2a). Can also move.

With such a structure, the ring-shaped member (3) is deformed so as to bulge outward (increase in diameter) in any direction, and the inside of the large-diameter pipe (A) is deformed. You can press to fix the pipe position. Therefore, the ring-shaped member (3) can be fixed by simply expanding and contracting the ring-shaped member (3) to an arbitrary length in a state where the pressing force is weak, and then rotating the ring-shaped member (3) in a direction that is easy for the user to rotate. This makes it easy to handle whether it is right-handed or left-handed.

(4) is a retainer provided at the end of the taper screw part (2) to prevent the ring-shaped member (3) from falling out of the taper screw part (2). It may be omitted if the diameter of the end of (2) is sufficiently large and there is no risk of the ring-shaped member (3) falling off.

In the above embodiment, two pipes having different diameters are used so that they can be expanded and contracted at one place, but pipes having three or more different diameters can be expanded and contracted at a plurality of places. Good.

Further, the application is not limited to pruning shears, saws, and insect nets for horticulture, and various other applications can be applied as long as they are convenient to expand and contract. For example, it can also be used for clothesline, fishing rod, mop handle, desk lamp, rod antenna, and various poles.

[0023]

[Effect of the invention]

 INDUSTRIAL APPLICABILITY As described above, according to the present invention, it is possible to provide a fixing structure for a telescopic pipe that is easy for the user to use, right-handed or left-handed.

[Brief description of the drawings]

FIG. 1 is a view showing a fixture used in the present invention.

FIG. 2 is a view showing a fixing structure of the present invention.

FIG. 3 is a view showing a conventional fixture.

FIG. 4 is a view showing a conventional fixing structure.

[Explanation of symbols]

 (A) Large diameter pipe (B) Small diameter pipe (1) Insertion part (2) Tapered screw part (3) Ring-shaped member

Claims (1)

[Utility model registration claims] 1. A telescopic pipe fixing structure used for fixing an overall length of a telescopic pipe formed by combining a large-diameter pipe and a small-diameter pipe to an arbitrary length, which is located in the large-diameter pipe. A fixing tool is attached to one end of the small-diameter pipe on the side, and the fixing tool can be attached to the taper screw part formed so that the diameter of the central part is smaller than the diameters of both ends, and the taper screw part. A fixing structure for a telescopic pipe, characterized in that it has an elastic ring-shaped member that is partly separated.