JPH0648440U - Eccentric cam type length adjustment position fixture - Google Patents

Abstract

(57) [Summary] [Purpose] A simple and powerful tool for adjusting the length of a double pipe that is vertically fixed by stretching it on the ceiling and floor to attach a relatively heavy product display shelf or a direct product. An eccentric cam type length adjustment position fixing device is provided. [Structure] For example, 0.3 mm with respect to the small diameter hole 7b of the fixture main body 7 fitted to the upper end of the large diameter pipe 6A of the double pipe.
In the eccentric eccentric hole 7c, the same 0.3m for the outer circumference 8a
An eccentric sleeve 8 having an eccentric cam hole 8b is rotatably fitted, and alignment marks showing a phase angle of zero when the small diameter hole 7b and the cam hole 8b are concentric are provided on the main body side and the eccentric sleeve side, respectively. The double pipe is expanded and contracted in the unclamped state of zero to match the distance between the ceiling and the floor, and the phase angle is changed to fix the length of the double pipe.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fixture for determining a length adjustment position of a retractable cylindrical double pipe that is stretched and fixed on a ceiling and a floor to install a product shelf or an audio device in an indoor space. is there.

[0002]

[Prior art]

 Conventionally, when installing a product shelf or an audio device in an indoor space, there is a method of mounting it on a pipe fixed vertically between the ceiling and the floor surface or between the ceiling and the table. There is a method of using a double pipe in which the outer diameter of the small diameter pipe fits into the hole of the large diameter pipe, and the length adjustment position is determined by a collet chuck or a screw type or spring type fixture. , There are few things that work satisfactorily as a support pipe that is fixed between the ceiling and floor surface for relatively heavy items. Therefore, as shown in FIG. 8 and FIG. 9, a single pipe 101 is vertically provided between the ceiling and the floor surface or between the ceiling and the table top, and is vertically fixed by adjusting bolts 102, and fixed to the pipe. The speaker 104 or the like of the audio device was attached.

[0003]

[Problems to be solved by the device]

 In the case of the single pipe that is stretched vertically as described in the conventional technology, the adjustment bolt adjustment cost is small, so the dimensions from the floor of the installation location to the ceiling or from the table top to the ceiling are measured beforehand, and the factory is adjusted to this dimension. The pipe had to be cut and brought to the site for installation, and the standard length stock pipes could not be used as they were, and there was a problem that labor and transportation costs were high. The present invention has been made in view of the above problems of the prior art. The purpose of the present invention is to provide an eccentric cam type length adjuster that can easily and strongly clamp the length of the double pife. It is intended to provide a position fixing device.

[0004]

In order to achieve the above object, an eccentric cam type length adjusting position fixing device according to the present invention is installed on a ceiling and a floor surface or a ceiling and a table top surface for attaching a product shelf or a product directly. A length adjusting position fixing device for a stretchable cylindrical double pipe that is stretched and fixed, and is a central hole that is provided at the tip of the large diameter pipe of the double pipe and allows the small diameter pipe to move in the axial direction. A main body of a fixture having an eccentric hole that is larger in diameter and slightly eccentric than the central hole, an outer periphery rotatably fitted in the eccentric hole, and a cam hole through which the small diameter pipe can move in the axial direction. And an eccentric sleeve that is relatively eccentric relative to each other, and performs clamping / unclamping by changing the phases of the main body and the eccentric sleeve. Further, an internal thread may be engraved in the eccentric hole of the fixture body, and an external thread to be screwed into the internal thread may be engraved on the outer circumference of the eccentric sleeve.

[0005]

[Action]

 With the hole in the center of the fixture main body and the cam hole on the eccentric sleeve side almost in the same phase, expand and contract the double pipe to adjust the length according to the distance between the ceiling and floor. By changing the phase of the main body and the eccentric sleeve, the axial positions of the large diameter pipe and the small diameter pipe are fixed.

[0006]

【Example】

 The first embodiment will be described below with reference to the drawings. As shown in FIG. 1, a columnar pipe 6 which is vertically fixed by being stretched by an adjusting bolt 5 via an upper washer 3 and a lower washer 4 on a ceiling 1 and a floor 2 has a small diameter inside a hole 6a of a large diameter pipe 6A. It has a double-pipe structure in which the pipe 6B is telescopically fitted, and a large-diameter hole 7a bored approximately at the center (center) of the fixture body 7 is fitted to the outer diameter of the upper end of the large-diameter pipe 6A. The upper end of the large-diameter pipe 6A abuts on the stepped end surface 7c between the large-diameter hole 7a and the small-diameter hole 7b to regulate the axial position. The outer circumference of the small diameter pipe 6B is fitted in the small diameter hole 7b so as to be movable in the axial direction, and an eccentric hole 7c having a larger diameter than the small diameter hole 7b is formed.

The amount of eccentricity of the eccentric hole 7c with respect to the large diameter hole 7a and the small diameter hole 7b varies depending on the pipe diameter, but is 0.3 mm when the diameter of the small diameter pipe is 30 mm, and the eccentric sleeve 8 is inserted in the eccentric hole 7c. The outer periphery 8a is rotatably fitted. The cam hole 8b of the eccentric sleeve 8 is eccentric to the outer circumference 8a by the same 0.3 mm as the main body 7 side, and the outer circumference of the small-diameter pipe 6B is fitted in the cam hole 8b so as to be movable in the axial direction. Rod wrench insertion holes 7d and 8c are formed in the collar portions of the main body 7 and the eccentric sleeve 8, and a matching mark indicating the minimum position of the wall thickness A is provided on the outer peripheral upper end of the main body 7, and the collar portion of the eccentric sleeve 8 is also provided. A matching mark representing the maximum position of the wall thickness B is engraved on the outer circumference.

In FIG. 2, two pipes 6 are erected between the ceiling and the floor, a pipe 11 is horizontally fixed between the two pipes via a connector 9, and a fixture 12 is attached to the pipe 11. It is an exhibition device to which a product shelf 13 is fixed. Further, FIG. 3 shows a speaker suspension in which a pipe 15 is horizontally fixed to a single pipe 6 erected between the ceiling and the floor via orthogonal connectors 14 and speakers 16 are fixed to both ends via fixtures 12. It is a device.

FIG. 4 is a cross-sectional view taken along the line CC of FIG. 1, showing the relationship between the phase angle of the main body 7 and the eccentric sleeve 8 and the tightening margin of the small-diameter hole 7b and the cam hole 8b that fit with the small-diameter pipe 6B. It was done. In the figure, a large amount of eccentricity is taken for easy understanding. When the main body 7 and the eccentric sleeve 8 match mark (phase angle is zero), the small diameter hole 7b and the cam hole 8b are concentric, and in this state, the length of the pipes 6A and 6B is adjusted according to the distance between the ceiling 1 and the floor 2. Adjust the height. After the length has been decided, the eccentric sleeve 8 is rotated to the right or left by hand, and when resistance is generated, a strong clamping force is generated simply by tightening it with a bar wrench.

As can be seen from FIG. 4, the state of this clamp is such that when the phase angle is 180 °, the misalignment of the cam hole 8b with respect to the small diameter hole 7b becomes maximum, and the tightening margin reaches twice the eccentric amount. Therefore, in the case of this example in which the amount of eccentricity is 0.3 mm, the maximum margin is 0.6 mm, and the difference between the outer diameter of the small diameter pipe 6B and the hole diameter of the small diameter hole 7b and the cam hole 8b is usually 0.15 mm. If it is about mm, the phase angle is about 45 ° and the clamped state is achieved.

Next, a second embodiment will be described with reference to FIG. The second embodiment is different from the first embodiment in that an eccentric hole of the fixture body 7 is engraved with a female screw 7e, and a male screw 8d screwed to the female screw 7e is provided on the outer circumference of the eccentric sleeve 8. Since only the parts are engraved and the other parts are the same, the same parts are designated by the same reference numerals to avoid duplication, and the description thereof will be omitted.

Further, the eccentric cam type length adjustment position fixing device of the present embodiment is not limited to the position determination of the length of the double pipe, and as shown in FIG. It can also be used as a clamp for an orthogonal connector 19 for supporting 18 at a right angle, and of course as a clamp for a fixture 22 for attaching a product shelf or a speaker to a pipe 21 as shown in FIG. Is.

[0013]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects. Fixing tool Change the phase angle of the eccentric sleeve provided in the eccentric hole of the main body to change the ratio of eccentricity between the small diameter hole of the main body and the cam hole of the eccentric sleeve, and fix the double pipe so as to bite by the wedge effect. Since it has a simple structure, it can obtain a strong clamping force that can be used with confidence even for the display of relatively heavy products, etc., and pipes at the factory according to the ceiling height of the installation site. There is no need to disconnect the cable, and labor and transportation costs can be reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a length adjusting position fixing device for a double pipe according to a first embodiment.

FIG. 2 is a perspective view of a display device using the fixture of the first embodiment.

FIG. 3 is a perspective view of a speaker suspension device using the fixture of the first embodiment.

FIG. 4 is a cross-sectional view taken along the line CC of FIG. 1, illustrating the relationship between the phase angle of the fixture body and the eccentric sleeve and the interference.

FIG. 5 is a cross-sectional view of a length adjusting position fixing device for a double pipe according to a second embodiment.

FIG. 6 is a perspective view of an orthogonal connector using an eccentric cam type fixture in an application example other than this embodiment.

FIG. 7 is a perspective view of a fixture using an eccentric cam type fixture in an application example other than this embodiment.

FIG. 8 is a perspective view of a display device using a conventional single pipe.

FIG. 9 is a perspective view of a speaker suspension system using a conventional single pipe.

[Explanation of symbols]

1 Ceiling 2 Floor 6 Pipe 6A Large Diameter Pipe 6B Small Diameter Pipe 7 Fixture Body 7b Small Diameter Hole (Center Hole) 7c Eccentric Hole 7e Female Thread 8 Eccentric Sleeve 8a Outer Edge 8b Cam Hole 8d Male Thread 13 Product Shelf 16 Speaker

Claims (2)

[Scope of utility model registration request] 1. A length-adjusting position fixing device for a double pipe, which is expandable and contractible and is stretched and fixed to a ceiling and a floor surface or a ceiling and a table upper surface for attaching a product shelf or a product directly. A fixture body having a central hole provided at the tip of the large diameter pipe of the double pipe and allowing the small diameter pipe to move in the axial direction, and an eccentric hole having a larger diameter and slightly eccentric than the central hole, and the eccentric hole An eccentric sleeve in which the outer periphery rotatably fitted into the eccentric pipe and a cam hole through which the small-diameter pipe can move in the axial direction are relatively eccentric relative to the eccentric hole. -Eccentric cam type length adjustment position fixing tool characterized by unclamping. 2. A female screw is engraved in the eccentric hole of the fixture body,
The eccentric cam type length adjusting position fixing device according to claim 1, wherein a male screw threaded to the female screw is engraved on the outer circumference of the eccentric sleeve.