JPH0447315Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention relates to a telescoping pole that can be used, for example, to support temporary antennas, etc. In particular, it has a structure that uses air pressure to extend the pipe, so that antennas, etc. It is designed so that it can be easily supported at a high place.

"Prior Art" For example, it would be convenient for a direction finding device used on land to be able to freely change its location and monitor the direction in which radio waves arrive.

For this reason, traditionally, a convenient location for monitoring is found, a direction finding antenna is temporarily installed at that location, and the direction of arrival of radio waves is measured.

Conventionally, when temporarily installing an antenna, a long pole is assembled by connecting a plurality of pipes like a fishing rod, a direction finding antenna is attached to the upper end of this pole, and the pole is maintained in a vertical position by a branch line.

``Problem that the invention seeks to solve'' Conventionally, multiple pipes are connected like a fishing rod to assemble a long pole, which is cumbersome to assemble.
Further, there may be a problem that the assembly takes a long time and the assembly is not completed within the time when the radio waves to be monitored are present. Furthermore, if there is a problem with the antenna after the antenna is attached to the tip of the pole and the pole is erected vertically, the pole must be brought down again, the problem with the antenna fixed, and then put up again.

Furthermore, since the poles must be fixed in the upright position using branch lines, at least two people are required.

Also, since the pole has to be placed vertically instead of lying on its side, a large space is required.

The purpose of this invention is to eliminate these drawbacks and provide a telescoping pole that can be easily and quickly erected vertically with a small number of personnel.

Another purpose of this invention is to provide a telescopic pole that allows long poles to be erected vertically even in narrow spaces.

"Means for Solving the Problem" In this invention, the lower end is sealed and has an air inlet, the upper end is open, and the proximal end pipe has a tightening means that can be tightened inward at the open end. The base pipe is inserted into the hollow part of the base pipe while maintaining airtightness against the inner wall of the base pipe, has an air intake port at the lower end, is open at the upper end, and is tightened inward at the open end. a telescoping pipe having a tightening means that allows for the expansion of the telescoping pipe; an upper end pipe that is inserted into the hollow part of the telescoping pipe in an airtight manner against the inner wall of the telescoping pipe and sealed at the lower end; and limiting the amount of expansion of the telescoping pipe and the upper end pipe. The pipe is constructed of a restricting means for vertically supporting the proximal end pipe, and a supporting means for vertically supporting the proximal end pipe.

In this configuration, the proximal pipe is vertically supported by the support means, and the telescopic pipe is tightened by the tightening means provided at the upper end of the proximal pipe, and then the air inlet provided at the lower end of the proximal pipe is connected. When compressed air is injected, the compressed air enters the hollow part of the extensible pipe from the base end pipe and pushes up the upper end pipe. The upper end pipe is fixed by a tightening means provided at the upper end of the telescopic pipe in a state in which the upper end pipe is extended upward to a position limited by the restricting means.

Next, when the tightening means provided at the upper end of the proximal pipe is loosened and the telescopic pipe becomes free, the telescopic pipe begins to extend upward due to the pressure of the compressed air, and extends to the position restricted by the restricting means. . In this expanded state, the extensible pipe is fixed by a tightening means provided at the upper end of the proximal pipe.

In this way, at least three pipes are supported in the vertical direction in a state where they are connected like fishing rods. When the telescopic pipe and the upper end pipe are fully extended, the tightening means fixes the space between the upper end pipe and the telescopic pipe and between the telescopic pipe and the base end pipe, so compressed air is no longer required in that state and the compressor can be removed. . Telescoping poles can be held firmly in place by tensioning branch lines as necessary.

As mentioned above, with the telescopic pole of this invention, the telescopic pole housed in the base end pipe and the upper end pole can be extended upward using compressed air, so the assembly effort is minimal and the desired pole can be erected in a short time. be able to.

In addition, the proximal end pipe is vertically supported by the support means in advance, and in that state, compressed air is applied to extend the upper end pipe and the telescopic pipe upward, so that manual operation is only required by operating the tightening means. . Therefore, one person can erect the pole in a short time.

Furthermore, since the upper end pipe and the telescopic pipe are extended upward while the base end pipe is erected, the pole can be easily erected even in a narrow space.

Further, in order to lower the upper end pipe and the telescopic pipe, the air can be let out by loosening the tightening means, so even if there is a problem with, for example, an antenna attached to the tip of the pole, the antenna can be easily pulled down. Therefore, for example, even when temporarily installing an antenna with a large number of elements and a complicated shape, the antenna can be easily pulled down even if an element is misplaced, which is convenient.

``Example'' Figure 1 shows the basic configuration of the telescopic pole according to this invention. In the figure, 1 indicates a base pipe, 2 indicates a telescopic pipe with an outer diameter slightly smaller than the inner diameter of the proximal pipe 1, and 3 indicates an upper end pipe, which has an outer diameter slightly smaller than the inner diameter of the telescopic pipe 2. Consists of pipes. These pipes 1, 2, and 3 are made of aluminum, for example, so that they are lightweight and easy to transport.

4 indicates support means. This support means 4 includes a ring 8 rotatably engaged with the circumferential surface of the proximal pipe 1;
A fixture 6 includes a band that tightens the ring 8 from the outside; one end is pivotally supported by the band constituting the fixture 6; the free end is close to the axis of the proximal pipe 1; A plurality of three or more support legs 9 rotatably supported in the direction of separation, and a metal ring 11 rotatably supported at the lower end of the base end pipe 1.
A, and an arm 11 having one end rotatably supported on the circumferential surface of the metal ring 11A and the other end rotatably connected to each free end of the support leg 9. supported in a vertical position on the ground.

By loosening the fixture 6 and removing the stopper 7 engaged between the support leg 9 and the arm 11, the support leg 9 can be removed.
The space between the ring 8 and the arm 11 becomes free, and as a result, the ring 8 can be slid upward.
By sliding the ring 8 upward, the supporting leg 9 and the arm 11 are gathered around the circumferential surface of the proximal end pipe 1, and the entire structure including the supporting means 4 becomes rod-shaped for convenient portability.

Reference numeral 12 indicates an air inlet provided at the lower end of the base end pipe 1. Compressed air is supplied to the air inlet 12 from a compressor 13 having a circuit structure as shown in FIG. 2, for example. The compressor 13 will be explained later.

Airtight valves 14 are attached to the lower ends of the base end pipe 1 and the telescopic pipe 2, respectively. The airtight valve 14 is made of a flexible material such as neoprene rubber (registered trademark), and the tip of the airtight valve 14 is pressed into contact with the inner wall of the proximal pipe 1 and the inner wall of the telescopic pipe 2 to close the space 15. and 16 are kept airtight.

In this example, the airtight valve 14 is attached to the lower ends of the base end pipe 1 and the telescopic pipe 2 by lids 17 and 18 formed of resin material. Its detailed structure is shown in FIGS. 3 and 4. FIG. 3 shows the structure of the lid 17 attached to the lower end of the telescopic pipe 2, and the fourth
The figure shows the structure of the lid 18 attached to the lower end of the upper end pipe 3.

These lids 17 and 18 each have a cylindrical portion 17
A, 18A, a thread is formed on the outer periphery of this cylindrical portion 17A, 18A, and this male thread is connected to the telescopic pipe 2.
And it is fixed to the lower ends of each of the pipes 2 and 3 by screwing into the internal thread formed on the inner wall of each lower end of the upper end pipe 3.

The lids 17 and 18 have flanges 17B and 18B at the lower ends of the cylindrical parts 17A and 18A, and the outer diameters of the flanges 17B and 18B are set to be slightly larger than the outer diameter of the telescopic pipe 2 and the outer diameter of the upper end pipe 3. Set to . In other words, the outer diameters of the flanges 17B and 18B are set approximately equal to the inner diameters of the outer pipes 1 and 2, so that the outer peripheral surfaces of the telescopic pipe 2 and the upper end pipe 3 do not directly contact the inner walls of the outer pipes 1 and 2. It has a structure. With this structure, the sliding contact area between the pipes can be reduced, and the frictional resistance during sliding can be reduced. For this reason, the resin material constituting the lids 17 and 18 is selected from a wear-resistant material such as Delrin, nylon, or Teflon.

Bosses 17C and 18 are provided on the bottom surfaces of the lids 17 and 18.
A thread is formed on the outer peripheral surface of each of the bosses 17C and 18C, and a nut 19 is screwed into the external thread to fix the airtight valve 14. Boss 17 of lid body 17
An air intake port 17D is formed in C, and compressed air is introduced into the space 16 surrounded by the inner wall of the telescopic pipe 2 through this air intake port 17D. Boss 1 of lid body 18
8C has an airtight structure without forming holes.

The lower end portion of the base end pipe 1 can be configured as shown in FIG. In FIG. 5, reference numeral 21 indicates a lid fitted to the lower end of the base end pipe 1. As shown in FIG. The lid body 21 has a cylindrical shape with a closed bottom and can be made, for example, from a block of aluminum by cutting. A hole is formed in the circumferential surface of the lid body 21, and the thin tube 22 in which the air inlet 12 is formed is screwed into the hole. A metal ring 11A is rotatably engaged with the outer periphery of the lower end of the lid 21, and the arm 11 of the support means 4 is coupled to this metal ring 11A. With this structure, the base end pipe 1 can be rotatably supported with respect to the support means 4.

A fastener 23 is provided at each upper end of the base end pipe 1 and the telescopic pipe 2, as shown in FIG. Fastener 2
The detailed structure of No. 3 is shown in FIGS. 6 and 7. The fastener 23 includes a cylindrical body 23A made of resin material,
Semi-annular body 23B that engages with the notch of this cylindrical body 23A
, metal band 23C, and this metal band 23C
This screw 23D tightens both ends of the
It can be configured by a handle 23E that is rotated.

The lower end of the cylindrical body 23A is screwed into the upper ends of the pipes 1 and 2, and the upper half protrudes upward from the upper ends of the pipes 1 and 2. This protruding portion is removed by half a circumference in the circumferential direction, and the semi-annular body 23B is engaged with this removed portion. A metal band 23C is hung around the outer periphery of the remaining half ring part 23F and half ring body 23B in the upper half, and screws 2 are attached to both ends of the metal band 23C.
3D is inserted, and by rotating the handle 23E, the metal band 23C is tightened and the semi-annular body 23B is tightened to the inner pipe 2 or 3.

24 indicates a limiting means. This limiting means 24 can be a string-like body such as a metal wire or a chain, and is provided to limit the amount of extension of the upper end pipe 3 and the telescopic pipe 2.

As shown in FIG. 2, the compressor 13 includes a motor 13A, an air pressure generator 13B driven by the motor 13A, and a pressure switch 13C.
It can be configured by a release valve 13D and a manual switch 13E.

In this example, the motor 13A is a DC motor. For this reason, the power supply 13F is made battery-powered so that it can be driven outdoors. When the manual switch 13E is turned to contact A, the battery 13F, pressure switch 13C, and motor 13A are connected in series. The pressure switch 13C is turned on if the pressure generated by the air pressure generator 13B is below a predetermined value. Therefore, at startup, the motor 13A is started and the air pressure generating section 13B is driven to generate air pressure. The air pressure generated in the air pressure generating section 13B is discharged from the discharge port 13G and supplied to the air inlet 12 provided at the lower end of the proximal pipe 1 through a hose (not particularly shown).

Even if the manual switch 13E remains at contact A with the upper end pipe 3 and the telescopic pipe 2 raised, if the air pressure generated in the air pressure generator 13B exceeds the specified pressure value, the pressure switch 13C will turn off and the motor will start. The drive of 13A stops automatically. Therefore, the specified pressure used for pole extension is guaranteed, and no strain is applied to the motor 13A. Furthermore, even if the pressure switch 13C malfunctions and the motor 13A continues to rotate, when the pressure in the air pressure generator 13B reaches the specified pressure, the pressure valve 13C
Since H is opened and excess air is released into the atmosphere,
Air pressure does not become abnormally high. When the changeover switch 13E is turned to the contact point B, the release valve 13D is opened and the discharge port 13G is opened to the atmosphere. As a result, the hollow portions of the telescopic pipe 2 and the base end pipe 1 are communicated with the atmosphere. Therefore, by first loosening the fastener 23 provided at the upper end of the base pipe 1, the air existing in the hollow part of the base pipe 1 is compressed by the weight of the telescopic pipe 2 and the upper pipe 3 and released into the atmosphere. be done.
The telescopic pipe 2 for this purpose descends in order and reaches the lower end without receiving a large impact. Next, when the fastener 23 provided at the upper end of the telescopic pipe 2 is loosened, the air present in the telescopic pipe 2 is compressed by the weight of the upper end pipe 1 and released into the atmosphere, and along with the release, the air existing in the telescopic pipe 2 is compressed by the weight of the upper end pipe 1 and released into the atmosphere. gradually declines.

Note that while the release valve 13D is operating, the pressure switch 13
Since the circuit E is turned off, the motor 13A is held in a non-operating state. In this way, the release valve 13D
Telescopic pipe 2 by releasing air through
The upper end pipe 3 can be lowered at an appropriate speed, and impact on, for example, an antenna mounted on the upper end pipe 3 can be prevented.

"Effect of the invention" As mentioned above, according to the telescopic pole of this invention, if there is a space where the proximal pipe 1 can be laid down, the pole can be erected at least twice to several times the length of the proximal pipe 1. be able to. However, once the proximal pipe 1 is supported in a vertical position by the support means 4, the pole can be extended by simply operating the compressor 13 and loosening and tightening the fasteners 23. This can shorten the time it takes to temporarily install a pole with the desired height. Therefore, it is convenient because the antenna can be temporarily installed at a desired height in a short time.

Furthermore, assembly requires only erecting the proximal end pipe 1 in a vertical position, activating the compressor, and operating the fastener 23, so even one person can erect the pole, providing a telescopic pole with good operability. can do.

Further, by loosening the fixing member 6 constituting the support means 4 from the locked state while the pole is in the upright position, the pole can be freely rotated about the base end pipe. Therefore, for example, the direction of the antenna can be freely selected.

In addition, in this invention, since the restricting means 24 made of wire or the like is provided on the outside of each pipe, the diameter of the proximal pipe 1 is smaller than when a stopper is provided between the pipes 1, 2, and 3 to prevent them from coming off. This has the advantage of being able to make the size smaller.

Although the case where the number of telescopic pipes 2 is one is described above, the number of telescopic pipes 2 can be selected to be any number from 1 to N.

In addition, although the case where the antenna is mounted on the tip of the pole has been explained above, it is also possible to install the antenna on the tip of the pole.
It is easy to understand that it can also be used to mount still cameras, lighting equipment, etc.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing an embodiment of this invention, Figure 2 is a connection diagram for explaining the electric circuit structure and air circuit structure of the compressor used in this invention, and Figures 3 to 7 are FIG. 3 is a cross-sectional view for explaining the detailed structure of each part of the telescopic pole according to the invention. 1... Proximal pipe, 2... Telescopic pipe, 3...
Upper end pipe, 4... Supporting means, 6... Fixture, 7
...Metal fittings, 8...Rings, 9, 11...Legs, 12
...Air inlet, 13...Compressor, 14...
...Airtight valve, 15, 16... Space, 17, 18...
Lid body, 17... Nuts, 21... Lid body, 22...
Thin tube, 23... tightening tool, 24... limiting means.

Claims (1)

[Claims for Utility Model Registration] A: A base end pipe with an air inlet formed at the lower end and an open upper end; B: A base end pipe having an outer diameter slightly smaller than the inner diameter of the base end pipe, and the upper end thereof being open. C) an upper end pipe having an outer diameter slightly smaller than the inner diameter of the expandable pipe and having an open upper end; D a pair of semi-annular bodies; and a band that tightens the pair of semi-annular bodies from the outside. One semi-annular body is attached to the upper ends of the proximal end pipe and the telescopic pipe, and the other half annular body is tightened with the band to allow the telescopic pipe to be placed inside the proximal end pipe. A fastener for tightening and fixing the pipe and the upper end pipe placed inside the telescoping pipe; E a lid body that closes the lower ends of each of the telescoping pipe and the upper end pipe; A flange formed of a wear-resistant resin material and protruding slightly from the outer diameter of the pipe closed by the lid, and G an air intake port formed in the lid provided at the lower end of the telescopic pipe. , H: an airtight valve provided on the lower surface of each of the lids and elastically contacting the inner wall of each outer pipe to maintain airtightness between the pipes; I: the base end pipe, the telescopic pipe, and the upper end pipe. a limiting means connected between the base end pipe and the telescopic pipe and the telescopic pipe and the upper end pipe on the outside of the base end pipe and configured by a string-like body that limits the amount of extension of the telescopic pipe and the upper end pipe; A fixture is composed of a ring rotatably engaged with the peripheral surface of an end pipe, a band that tightens this ring from the outside, and one end is pivotally supported by the band that constitutes this fixture, and the free end is three or more supporting legs supported so as to be rotatable in directions approaching and away from the axis of the base end pipe;
A metal ring rotatably supported at the lower end of the base pipe, one end rotatably supported on the circumferential surface of the metal ring, and the other end rotatably attached to the free end of each of the plurality of supporting legs. a support means configured by an arm connected to the base end pipe and supporting the base end pipe in a vertical position on the ground; A compressor that provides compressed air; L A pressure switch that stops the operation of the compressor when the air pressure applied to the base end pipe reaches a set value; M An air inlet of the base end pipe that is energized by switching the manual switch. A telescoping pole characterized by comprising: a release valve for opening the to the atmosphere; and a retractable pole.