JPH0739655U - Expansion joint - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a telescopic joint that can be instantly telescopically operated by a simple operation without using a special tool. A first fitting hole 31 for inserting and fixing an end of a thick pipe 1 is formed on one side of a hollow portion of a tubular joint body 30. A second fitting hole 32 through which the thin pipe 2 is inserted is formed on the other side of the hollow portion of the joint body 30. The thin pipe 2 is inserted into the hollow portion of the thick pipe 1 so as to be able to move in and out. A pressing member 37 that presses the outer circumference of the thin pipe 2 to press and fix the thin pipe 2 against the inner surface of the second fitting hole 32 is rotatably attached to the joint body 30. The pressing member 37 is selectively switched between a pressing position and an opening position by rotating. When the pressing member 37 is set to the open position, the thin pipe 2 can move in and out of the hollow portion of the thick pipe 1, and when the pressing member 37 is set to the pressing position, the thin pipe 2 can be fixed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 TECHNICAL FIELD The present invention relates to an expansion joint for elastically connecting a clothes rod or a pipe constituting a hanger for clothes or miscellaneous goods.

[0002]

[Prior art]

 Conventionally, for example, as a stretchable clothesline, there has been known one in which a thin pipe is inserted into a thick pipe so that the thin pipe can be put in and out, and a fixing screw is screwed to the thick pipe. When using this clothesline, pull out a thin pipe from the thick pipe, extend the whole body to the used state, and then screw in the fixing screw to press the outer periphery of the thin pipe to make it thin. Press and fix to the inner surface of the pipe. When storing, loosen the fixing screw and insert a thin pipe into a thick pipe to make the whole short and small, and then screw in the fixing screw to fix it.

[0003]

[Problems to be solved by the device]

 As described above, the conventional stretchable clothesline requires both a loosening operation and a tightening operation of the fixing screw both when used and when stored, which is both troublesome and necessary. It takes time. Moreover, since a tool such as a screwdriver is required to rotate the fixing screw, this tool must always be stored together with the clothesline.

Therefore, the present invention has been made in view of the above problems, and can expand and contract a thick pipe and a thin pipe inserted therein with a simple operation without using a special tool. The purpose is to provide a joint.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention is provided with a first fitting hole for inserting and fixing an end of a thick pipe on one end side of a tubular joint body of a clothesline. A second fitting hole into which a thin pipe is inserted is formed on the other end side of the main body, and the outer circumference of the thin pipe inserted into the thick pipe is pressed against the joint body so that the thin pipe is fitted into the second fitting hole. A pressing member that presses and fixes the inner surface of the is rotatably attached to the pressing position and the opening position.

[0006]

[Action]

 This expansion joint has a thick pipe inserted into the first fitting hole of the joint body from one end side and is always fixed, and when the pressing member is turned to the open position, The pressing by the pressing member is released, and this thin pipe can enter and leave the hollow portion of the thick pipe. In this state, a thin pipe is arbitrarily moved in and out of a thick pipe to expand and contract both pipes to a desired length. That is, when using, a thin pipe is pulled out from the thick pipe to extend the entire length, while at the time of storage, the thin pipe is inserted into the thick pipe to shorten the overall length. After that, when the pressing member is rotated and set to the pressing position, the pressing member presses the outer periphery of the thin pipe and presses and fixes the thin pipe against the inner surface of the second fitting hole. In this way, it is possible to switch between a state in which a thin pipe can be moved in and out of a thick pipe and a state in which the thin pipe is fixed by only one-touch operation of rotating the pressing member, so no special tool is required and it is easy. The length of the entire pipe can be expanded and contracted immediately by simple operation.

[0007]

【Example】

 Hereinafter, a preferred embodiment in which the expansion joint of the present invention is applied to a clothesline will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of a clothesline according to an embodiment of the present invention. In this embodiment, a case where a thick circular pipe 1 is arranged in the central portion and thin circular pipes 2 having an outer diameter slightly smaller than the inner diameter of the thick pipe 1 are arranged on both ends of the thick pipe 1 respectively. It is illustrated. The thick pipe 1 and the thin pipes 2 are protected by coating the surfaces thereof with a vinyl chloride film (not shown). Note that, contrary to FIG. 1, a thin pipe 2 may be arranged in the central portion, and thick pipes of the same shape may be arranged on both end sides thereof.

The two thin pipes 2 are inserted into the hollow portion of the thick pipe 1 through openings at both ends thereof so as to be freely inserted and removed. The entire length of the clothesline is expanded or contracted depending on the degree of the thin pipe 2 coming into or out of the thick pipe 1. The same expansion joints 3 and 3 are attached to both ends of the thick pipe 1 in order to selectively set whether to allow the thin pipe 2 to move in and out of the thick pipe 1 or to fix the thin pipe 2. ing.

FIG. 2 is a perspective view of the expansion joint 3, and FIGS. 5A to 5F are front views, plan views, bottom views, left side views, right side views and rear views of the expansion joint 3. The figures are shown below. Further, FIG. 3 shows a sectional view taken along the line III-III in FIG. As shown in FIGS. 1 and 2, the joint body 30 of the expandable joint 3 has a substantially cylindrical shape, and one side of the hollow portion thereof has an inner diameter slightly larger than the outer diameter of the thick pipe 1. The first fitting hole 31 is formed, and the second fitting hole 32 having an inner diameter slightly larger than the outer diameter of the thin pipe 2 is formed on the other side of the hollow portion. 32 communicates.

As shown in FIGS. 2 and 5 (e), a plurality of (eight in the figure) thin linear ribs 33 are formed inside the first fitting hole 31 along the axial direction. It is projected to the direction. The thick pipe 1 shown in FIG. 1 is pressed into the first fitting hole 31 while crushing the ribs 33, and the tip of the thick pipe 1 forms a step portion 34 that forms a boundary between the fitting holes 31 and 32. It is fixed in the first fitting hole 31 in a state in which the contact is determined. Therefore, as shown in FIG. 1, the two expansion joints 3 and 3 are attached to both ends of the thick pipe 1 with their first fitting holes 31 facing each other with their directions reversed. .

The two thin pipes 2 are inserted into the thick pipes 1 through the second fitting holes 32 of each expansion joint 3, respectively. As shown in FIGS. 1 and 3, a mounting hole 35 is formed on the side of the second fitting hole 32, and the other end of the mounting hole 35 is provided in correspondence with the mounting hole 35 as shown in FIG. A mounting recess 36 is formed on the outer surface. Then, as clearly shown in FIG. 3, the base end portion 37a of the pressing member 37 which is curved in a substantially arc shape is fitted into the above-mentioned mounting hole 35, and as shown in FIG. The support pin is press-fitted and is rotatably attached to the pivot pin 38 as a fulcrum.

As shown in FIG. 4B, two pressing projections 37b arranged in the axial direction are provided on the inner peripheral surface side of the base end portion 37a of the pressing member 37. Further, an operation knob portion 37c is formed on the free end portion of the pressing member 37 which is rotatable around the base end portion 37a as a fulcrum. Further, as shown in FIG. 3, a fitting recess 39 is formed on the outer surface that is continuous with the mounting hole 35 and is close to a half circumference. The fitting recess 39 has a shape into which the pressing member 39 fits when the pressing member 37 is rotated from the open state shown in FIG. 3 to the state shown in FIG. 4A. There is.

The pressing member 37 is pressed in the open position shown in FIG. 3 where the pressing projection 37b is separated from the thin pipe 2 and in the closed position shown in FIGS. 4 (a) and 4 (b). The projecting portion 37b can be selectively rotated to a pressing position where the thin pipe 2 is pressed against the inner surface of the second fitting hole 32. 1 and 2 show a state in which the pressing member 37 is set to the open position, and FIGS. 5A to 5F show a state in which the pressing member 37 is set to the pressing position.

Next, the operation of expanding and contracting the clothesline of the above embodiment will be described. As shown in FIG. 1, the thick pipe 1 is always fixed in the first fitting hole 31 of the expansion joint 3. When the pressing member 37 is rotated by the operation knob 37c to set the thin pipe 2 to the open position shown in FIGS. 1 to 3, the pressing projection 37b is separated from the thin pipe 2 so that It is possible to go in and out of the hollow part. In this state, the thin pipe 2 is arbitrarily moved in and out of the thick pipe 1 to expand and contract the entire length of the clothesline. That is, when used, the thin pipe 2 is pulled out from the thick pipe 1 to extend the entire length of the rod, while when stored, the thin pipe 2 is inserted into the thick pipe 1 to shorten the entire length of the rod.

After that, when the pressing member 37 is rotated to set to the pressing position shown in FIGS. 4 and 5, the pressing protrusion 37b of the pressing member 37 is thin as shown in FIG. The pipe 2 is pressed, and the thin pipe 2 is pressed against the inner surface of the second fitting hole 32 to be fixed. Here, when a vinyl chloride film is provided on the outer periphery of the pipe 2, the pressing protrusion 37b dents the soft vinyl chloride film and fits into this, so that the pressing member 37 does not fix the pipe 2 to the pipe 2. Be made stronger.

As described above, this clothesline has a thin pipe 2 which is thickened only by a one-touch operation of rotating the pressing member 37 attached to itself to the open position and the pressing position. It can be set by switching between a state where the pipe 1 can be freely moved in and out and a state where the thin pipe 2 is fixed. Therefore, it is not necessary to prepare a special tool for expanding and contracting, and the entire length can be expanded and contracted immediately with extremely simple operation.

6 to 8 show another example of the expansion joint 3. 6 is a perspective view of the pressing member 37 in the open position, FIG. 7 is a perspective view of the pressing member 37 in the pressing position, and FIGS. 8A to 8G are front views and plan views. A bottom view, a left side view, a right side view, a rear view and a vertical sectional view are respectively shown, and FIG. 8 (h) shows a sectional view taken along line VIII-VIII of FIG. 8 (g). In these figures, parts corresponding to the respective parts of the first embodiment shown in FIGS. 1 to 5 are designated by the same reference numerals.

In the first embodiment, the pressing member 37 is configured to rotate in the direction orthogonal to the axial direction, whereas in the expansion joint 3 of this embodiment, the pressing member 37 is orthogonal to the axial direction. The only difference is that the pivot pin 38, which is laid across a pair of support plate portions 3a and 3b that are arranged in the width direction, is pivoted in the axial direction. Is.

The expansion joint 3 of the present invention can be used for various pipe-making appliances such as the clothes rods used in the above-mentioned embodiments, as well as the pipes that make up hangers for clothes and miscellaneous goods. Can be used as a joint.

[0020]

[Effect of device]

 As described above, according to the expansion joint of the present invention, when the thick pipe is fixed to the first fitting hole of the connector and the pressing member is rotated to set the opening position, The thin pipe can be put in and out of the hollow part of the thick pipe. On the other hand, when the pressing member is rotated and set to the pressing position, the thin pipe is pressed by the pressing member and fixed to the inner surface of the second fitting hole. From this, it is possible to switch between a state where a thin pipe can be freely moved in and out of a thick pipe and a state where a thin pipe is fixed by a one-touch operation of rotating the pressing member attached to the joint body. The length of the entire pipe can be expanded and contracted immediately with a simple operation.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a clothesline using an expansion joint according to an embodiment of the present invention with a pressing member set to an open position.

FIG. 2 is a perspective view of the connector in the above state.

3 is a sectional view taken along line III-III in FIG.

4A is a cross-sectional view corresponding to FIG. 3 showing a state in which a pressing member is set at a pressing position, and FIG. 4B is a V-V of FIG.
It is sectional drawing which followed the line.

5 (a) to (f) are a front view, a plan view, a bottom view, a left side view, a right side view and a rear view, respectively, of the connecting tool.

FIG. 6 is a perspective view showing an open state of another connecting member used for the clothesline according to the embodiment of the present invention.

FIG. 7 is a perspective view showing a pressed state of the same coupling tool.

8 (a) to 8 (h) are front views, plan views, bottom views, left side views, right side views, rear views, longitudinal sectional views and principal section sectional views showing the pressing state of the above-mentioned connecting tool, respectively. Is.

[Explanation of symbols]

1 ... Thick pipe, 2 ... Thin pipe, 3 ... Expansion joint, 30 ... Joint body, 31 ... First fitting hole, 32 ...
2nd fitting hole, 37 ... pressing member.

Claims (1)

[Scope of utility model registration request] 1. An expansion joint for connecting both pipes in a state where a thin pipe is inserted in a hollow portion of the thick pipe, wherein an end portion of the thick pipe is inserted and fixed to one end side of a tubular joint body. A first fitting hole is formed, a second fitting hole for inserting a thin pipe is formed on the other end side of the joint body, and an outer circumference of the thin pipe inserted in the hollow portion of the thick pipe is formed in the joint body. An expansion joint in which a pressing member for pressing and fixing the thin pipe against the inner surface of the second fitting hole is rotatably attached to the pressing position and the opening position.