JP2002195488A - Telescopic pipe device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a telescopic pipe device capable of improving a holding force against a load and securely and easily fixing a telescopic body at a requested position and releasing the fixing. SOLUTION: The telescopic device 1 comprises a telescopic pipe 2 including a plurality of pipe members with different inner diameters connected to each other to be telescopic, and a support mechanism 4 for supporting and fixing the telescopic pipe 2 in the arbitrary length. In the telescopic pipe device 1, the support mechanism 4 has a band-like tubular spring 11 and a band-like body 16. One end of the tubular spring 11 is wound to a first winding shaft 10, and the other end is fixed to the top of the telescopic pipe 2, and the tubular spring 11 is given stress to deform a part fed out from the first winding shaft 10 in a nearly cylindrical shape. The band-like body 16 overlaps at least with a part of the tubular spring 11 wound around the first winding shaft 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telescopic pipe device on which a camera, a lighting fixture and the like can be placed and supported at an arbitrary height.

[0002]

2. Description of the Related Art A reciprocating mechanism such as a telescopic column disclosed in Japanese Patent Publication No. 2652592 has an elongated reciprocating member, a driving unit for reciprocating the reciprocating member, and a play insertion hole for the reciprocating member at a central portion. A plurality of centering members connected to the centering member, the centering member being capable of changing the distance between the centering members by moving in conjunction with the movement of the movement member, and a movement passage for supporting and guiding the movement of the centering member. It consists of:

[0003]

In the above-mentioned conventional apparatus, as a member for supporting the elastic body, a plastic strip (commonly called convex) having an arch-shaped cross section is used as a member for supporting the elastic body.
Is used. This convex has low ability to support load and is easy to buckle, and the load that can be supported by the device using the convex is small, and when a large load is applied,
The elastic body may slip down. Some locks are provided with a lock mechanism to prevent this sliding, but many have complicated structures and operations.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a telescopic pipe device capable of improving a holding force against a load and securely and easily fixing and releasing fixing of a telescopic body at a desired position.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a telescopic pipe in which a plurality of pipe-shaped members having different inner diameters are connected to each other so as to be expandable and contractable, and the telescopic pipe has an arbitrary length. And a support mechanism configured to support and fix the telescopic pipe, wherein the support mechanism has one end wound around a first winding shaft and the other end fixed to a distal end portion of the telescopic pipe. A belt-like tubular spring to which a portion of the tubular spring wound around the first reel is overlapped with at least a part of the tubular spring wound around the first reel. (Claim 1).

According to this, the telescopic pipe extended to a desired length is supported by the tubular spring. When this cylindrical spring is unreeled from the first winding shaft, it has the property of being rounded about the longitudinal direction and has a larger curve than a conventional convex and deforms into a substantially cylindrical shape. Demonstrate strong buckling resistance. Thus, a telescopic pipe device capable of withstanding a large load can be provided.

Further, by displacing, in a predetermined direction, a belt-like body overlapping at least a part of the cylindrical spring wound around the first winding shaft, the first winding shaft is rotated by the frictional force of the overlapping portion. The cylinder spring can be extended. For example, one end of the strip is wound around the first winding shaft together with the tubular spring, and the other end is wound around the second winding shaft (claim 2), or one end is a second winding shaft. And the other end is wound around a third winding shaft, and the intermediate portion is preferably in contact with the outer surface of a cylindrical spring wound around the first winding shaft (claim 3). It is preferable that the strip is thin and has high tensile strength.

The tubular spring is formed by a center point of the section and both ends of the tubular spring in a cross section in a width direction of a substantially cylindrical portion which is fed from the first band-shaped body. It is preferable that the angle on the convex side of the tubular spring is 180 ° or more (claim 4). When this angle is 180 ° or more, the strength of the cylindrical spring is dramatically improved, so that it is possible to withstand a large load.

Preferably, the belt-like body is a constant load spring.

The constant load spring has a property of generating a substantially constant torque irrespective of the amount of withdrawal, so that a constant torque is always applied to the operation of extending or contracting the telescopic pipe regardless of the amount of extension of the telescopic pipe. be able to. As the constant load spring, FIG.
The O-type as shown in FIG.
An N-type as shown in FIG. The O-type constant load spring 16 is wound between the large diameter first winding shaft 10 and the small diameter second winding shaft 15 in the same direction. The constant load spring 16 ′ is connected to the first reel 1.
0 and the second winding shaft 15 are wound in the opposite direction. Both of the above constant load springs 16 and 16 ′
In the natural state, it is provided with a property of being rounded with a smaller diameter than each of the winding shafts 10 and 15, and when wound around the winding shafts 10 and 15, it comes into close contact with it.

Further, the belt-like body may be formed in an annular shape.

[0012] The band-shaped body does not necessarily have an end, but may be a ring-shaped one, that is, an endless shape formed by connecting both ends. According to this, it is possible to eliminate the work of winding two materials having different properties around one winding shaft, which is advantageous in terms of manufacturing and the like.

Further, it is preferable that a buckling prevention means is provided for preventing the tubular spring fed from the first winding shaft from buckling radially outward of the first winding shaft. ).

Although the cylindrical spring has a high strength at a portion deformed into a cylindrical shape, the portion just fed from the first winding shaft is apt to buckle because it is not completely cylindrical. Therefore, if the portion at the start of feeding is prevented from loosening, buckling of the tubular spring can be prevented.

As the buckling preventing means, the band is disposed further outside the outermost portion of the cylindrical spring wound around the first winding shaft, and the band is attached to the first spring. It is preferable to provide a means for shifting to the winding shaft side (claim 8).

According to this, since the feeding start position of the tubular spring is supported by the belt-shaped body, it is possible to prevent the tubular spring from being slackened radially outward of the first winding shaft.

Further, in the telescopic pipe device according to the present invention, the tubular spring, which is extended by rotating the first winding shaft in a predetermined direction, in conjunction with the first winding shaft, is provided. It is preferable to provide a cylindrical spring rewinding means for rewinding the reel around the winding shaft.

As described above, the first winding shaft is rotatable in a predetermined direction by, for example, a manual handle or an electric motor, so that the drawn-out tubular spring is rewound to contract the telescopic pipe. be able to.

Further, in the telescopic pipe device according to the present invention, in cooperation with the second winding shaft, the second winding shaft is rotated to displace the band-like body, thereby causing a frictional force between the band-like body and the tubular spring. It is preferable to provide a tube spring feeding means for feeding the tube spring by rotating the first winding shaft.

In this way, the telescopic pipe can be moved up and down without any trouble by providing the operating means for extending the cylindrical spring on the second wound shaft of the belt-shaped body without providing the operating means on the first wound shaft. Can be done. Examples of the cylinder spring feeding means include a manual handle and an electric motor.

Preferably, a lock mechanism is provided for preventing the second winding shaft from rotating in a direction opposite to a direction in which the tubular spring is extended (claim 11).

The belt-shaped body wound around the second winding shaft and the tubular spring wound around the first winding shaft are wound or overlapped with each other. By stopping the movement, the movement of the tubular spring can be stopped by the frictional force between the two. Thus, the extended tubular spring can be fixed, and the telescopic pipe can be fixed. Also,
By providing such a lock mechanism on the second winding shaft (claim 12), the structure can be simplified.

Further, the telescopic pipe device of the present invention is preferably provided with a brake mechanism for reducing the moving speed of the tubular spring when the extended tubular spring rewinds around the first reel. Claim 13).

[0024] According to this, even when a heavy object is placed on the upper end of the telescopic pipe, it is possible to prevent a sharp descent, so that safety can be improved.

[0025]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a telescopic pipe device 1 according to a first embodiment of the present invention.
Is a telescopic pipe 2 which can be extended and retracted, a base 3 on which the telescopic pipe 2 is erected, and which is disposed inside the telescopic pipe 2 and the base 3 and holds the telescopic pipe 2 at a desired height. And a buckling prevention means 5 for preventing buckling of the tubular spring 11 constituting a part of the support mechanism 4.

The telescopic pipe 2 is composed of a plurality of pipes whose inner diameter gradually increases from the upper end to the lower end, and adjacent pipes are engaged with each other at the upper end and the lower end of each pipe. The pipes are formed so that the pipes can be extended and contracted and are not separated from each other when the pipes are extended. At the upper end of the telescopic pipe 2, a tip 6 on which a camera, a lighting device and the like can be placed is fixed.

The base portion 3 is a box-shaped member having a space inside, and the lowermost pipe of the telescopic pipe 2 is fixed to the upper surface, and the inner space is formed by drilling the inside of the pipe and the upper surface. Communicating through the hole. Also,
A support mechanism 4 described later in detail is provided in the internal space of the base 3.
And the buckling prevention means 5 is stored.

The support mechanism 4 includes a first reel 10 rotatably supported on the wall of the base 3, a cylindrical spring 11 having one end wound on the first reel 10, A second winding shaft 15 rotatably supported on the wall surface of the base 3;
And a lock mechanism 20 formed on the second winding shaft 15 and having a one-way function.

The tubular spring 11 is provided with a longitudinal stress component that tends to bend around the width direction and a transverse stress component that tends to bend around the longitudinal direction on the strip-shaped steel plate, and tries to curl in the longitudinal direction. And the moment of going into a cylindrical shape coexist.
Has a property of being deformed into a cylindrical shape.

As shown in FIG. 3, the cylindrical spring 11 has a center portion O of the substantially circular cross section and both ends of the cylindrical spring 11 in the width direction in a cross section in a width direction of a substantially cylindrical portion. And the angle α on the convex side of the tubular spring 11 is 180
４００400 °. This can be achieved by adjusting the strength of the stress applied to the steel plate when the tubular spring 11 is manufactured. Further, in the first embodiment, since the cylindrical spring 11 is provided so that the vector of the longitudinal stress component and the vector of the transverse stress component are oriented in substantially the same direction, the extended portion is the same as that of the first embodiment. The first winding shaft 10 is curved so as to be convex on the opposite side.

The cylindrical spring 11 is shown in FIGS.
As shown in FIG. 2, a portion pulled out from the first winding shaft 10 is inserted into the telescopic pipe 2 via a slit guide 31 provided on the upper surface of the base 3, and the other end is connected to the tip tool 6. Connected. The slit guide 31
Is formed with a slit having a shape through which a cylindrical spring 11 can be inserted. In addition, the first reel 10
A rewinding handle 14 is fixed to the side surface portion 12 via a support shaft 13.

One end of the constant load spring 16 is the first load spring 16.
And the other end thereof is wound around the second winding shaft 15. Further, in the first winding shaft 10, the constant load spring 16 is wound around the outside of the tubular spring 11. The constant load spring 16 is formed by applying a stress to a belt-shaped steel plate to bend around the width direction at the same curvature, and has a property of generating a substantially constant torque regardless of the feeding amount. Things. The constant load spring 16 has a property that, when both ends are wound around two winding shafts, the constant load spring 16 tends to wind from a larger winding diameter to a smaller winding diameter. In the above, the second reel 15 is connected to the first reel 1
Since the diameter is smaller than 0, the torque of the constant load spring 16 always tends to rewind from the first winding shaft 10 to the second winding shaft 15, that is, from the first winding shaft 10 to the cylindrical spring 11.
Working in the direction of paying out.

The lock mechanism 20 is connected to the second reel 1
A ratchet wheel 22 having a plurality of notches 21 fixed to a side surface of the base 5, and a claw 25 rotatably supported by the base 3 by a support shaft 24 and meshing with the notch 21.
And has a lock release lever 26 operable by a user, and a spring member 27 for urging the lock release lever 26 in the locking direction. Notch 21
Allows the ratchet wheel 22 and the second reel 15 to rotate in the direction B in which the constant load spring 16 is unwound from the first reel 10 to the second reel 15, but in the opposite direction. Is locked by engagement with the claw portion 25 of the lock release lever 26. The ratchet wheel 22 has a handle 28 for feeding out.
Are fixed via a support shaft 29.

The extension handle 28 is provided by a user.
Is rotated in the direction of arrow B, the constant load spring 16 wound on the first winding shaft 10 is wound on the second winding shaft 15, whereby the first winding shaft 10 is rotated. , The tubular spring 11 is extended in the direction of arrow D, and the telescopic pipe 2 is extended. The rotation of the second reel 15 in the direction in which the constant load spring 16 rewinds around the first reel 10 is locked by the lock mechanism 20. It is prevented from being pushed back in the direction of arrow E by the like. When the tubular spring 11 is returned in the direction of arrow E, that is, when the telescopic pipe 2 is contracted, the lock release lever 26 is moved in the direction of arrow C to release the lock of the second winding shaft 15, and the winding is performed. The return handle 14 is rotated in the direction of arrow A. When the lock of the lock release lever 26 is released,
It is also possible for the device including the object placed on the tip device 6 to naturally descend by its own weight.

The buckling prevention means 5 is provided in the vicinity of the position where the cylindrical spring 11 starts to be unreeled from the first winding shaft 10.
In the first embodiment, a trapezoidal member 33 slidably disposed inside the base 3 and a spring 36 are provided. It is configured to have. This trapezoidal member 33
The contact surface 3 is located below the second winding shaft 15 and at a portion where the cylindrical spring 11 starts to be fed out from the first winding shaft 10.
The slit 35 is formed from the extended portion of the first reel 10 of the constant load spring 16 toward the extended portion of the second reel 15. The constant load spring 16 passes through both slits 10, 1 through this slit 35.
It is wound around 5. The spring 36 is connected to the trapezoidal member 3.
3 is pressed against the first reel 10.

According to the buckling preventing means 5, the cylindrical spring 11 is pressed by the contact surface 34 of the trapezoidal member 33, and the constant load spring 16 is wound around the cylindrical spring 11, so that the cylindrical spring 11 Since the slack 11 is prevented, it is possible to prevent the tubular spring 11 from buckling radially outward of the first winding shaft 10. In order to sufficiently exhibit such an effect of preventing buckling, as shown in FIG. 3, it is preferable that the angle θ formed by the tubular spring 11 and the constant load spring 16 is in a range of 0 to 45 °.

According to the telescopic pipe device 1 according to the first embodiment, the telescopic pipe 2 can be supported by using the tubular spring 11 having the angle α of 180 ° or more as a bone supporting the telescopic pipe 2. The load can be remarkably increased, and the operation of raising the telescopic pipe 2 can be performed without slipping by wrapping the tubular spring 11 and the constant load spring 16 together. Further, the telescopic pipe 2 can be securely fixed at an arbitrary length by the lock mechanism 20 provided on the second winding shaft 15, and the lock can be unlocked and removed with one touch.

In the following, another embodiment of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals are given to parts having the same or similar functions as those of the first embodiment. The description is omitted.

A telescopic pipe device 40 according to a second embodiment of the present invention shown in FIGS. 4 and 5 includes a roller 45 as the buckling preventing means 5.
The roller 45 applies a constant load spring 1 to the unwound cylindrical spring 11 near the unwinding start position from the first winding shaft 10.
6 is provided so as to be close to each other, and is rotatably fixed to a wall surface of the base 3 via a support shaft 44. The constant load spring 16 extended from the first reel 10 is wound around the second reel 15 through the cylindrical spring 11 side of the roller 45.

According to the above configuration, the cylindrical spring 11 at the position where the feeding from the first reel 10 is started is pressed by the constant load spring 16, so that the cylindrical spring 11 wound around the first reel 10 is formed.
Can be prevented from loosing, and buckling outward in the radial direction can be prevented. Further, the friction between the constant load spring 16 and the buckling prevention means 5 (the roller 45) is reduced, so that the operability can be improved.

In the telescopic pipe device 48 according to the third embodiment shown in FIG. 6, the buckling prevention means 5 has a roller 51, an arm 52, a spring 53, and a control roller 54. . The roller 51
Is rotatably supported by the upper end of the arm 52.
The lower end of the arm 52 is rotatably supported by a base 55 formed on the bottom surface of the base 3. One end of the spring 53 is fixed to the side wall surface of the base 3 and the other end is fixed to the arm 52, and presses the arm 52 against the cylindrical spring 11 side. The control roller 54 includes:
It is provided on the concave side of the tubular spring 11 at a position facing the roller 51, is rotatably fixed to the wall surface of the base 3 via a support shaft 56, and can be driven by a predetermined servo motor or handle. is there.

According to the above configuration, the constant load spring 16 can be pressed against the cylindrical spring 11 by the roller 51 at the position where the feeding from the first winding shaft 10 is started.
Buckling of the tube spring 11 can be prevented. Further, the control roller 54 is driven by a servo motor or a handle,
By sandwiching the tubular spring 11 with the roller 51, the tubular spring 11 can be raised and lowered.

A telescopic pipe device 58 according to a fourth embodiment shown in FIG. 7 includes a roller 45 having the same configuration as that of the second embodiment as the buckling prevention means 5. The constant load spring 16 has one end wound around the second winding shaft 15, the other end wound around the third winding shaft 61, and an intermediate portion wound around the first winding shaft 10. It is in contact with the outer surface of the turned tubular spring 11. The third winding shaft 61 is rotatably supported on a wall surface of the base 3 via a support shaft 62, has a larger diameter than the second winding shaft 15, and has the first winding shaft 61. 10 has a diameter which is always the same as that of the first winding shaft 10 and is rotated in synchronization with the first winding shaft 10 by a transmission member 63 such as a chain.

With this configuration, the handle 28 for feeding out is provided.
Is rotated in the direction of arrow B, the constant load spring 16
Is wound around the second winding shaft 15 from the winding shaft 61 of
Due to the frictional force between the fixed load spring 16 and the cylindrical spring 11 wound around the first cylindrical shaft 10, the first cylindrical shaft 10 rotates and the cylindrical spring 11 is extended in the direction of arrow D. At this time, since the constant load spring 16 generates a torque to wind the large diameter third winding shaft 61 around the small diameter second winding shaft 15, the load applied to the user is reduced. When the lock mechanism 20 is released and the rewind handle 14 is rotated in the direction of arrow A, the transmission member 63 rotates the third reel 61 in synchronization with the first reel 10, The spring 11 is wound on the first winding shaft 10 and the constant load spring 16 is wound on the third winding shaft 61 from the second winding shaft 15.

The telescopic pipe device 58 according to the fourth embodiment is provided with a brake mechanism 66 for lowering the lowering speed of the tubular spring 11 when lowering the extended telescopic pipe 2. The brake mechanism 66 includes a wedge-shaped member 67 and a spring 68. The wedge-shaped member 67 is disposed on an inclined portion 69 formed integrally with the base portion 3 and inclined so as to gradually narrow from the upper side to the lower side toward the cylindrical spring 11.
The contact pressure against the concave side surface of the tubular spring 11 increases as going downward along the inclined portion 69. The spring 68 has one end in contact with the upper wall of the base 3 and the other end in contact with the upper end of the wedge-shaped member 67, and presses the wedge-shaped member 67 downward.

By the brake mechanism 66, the cylinder spring 11
Moves in the direction of arrow E, that is, when the telescopic pipe 2 is lowered, the contact pressure of the wedge-shaped member 67 against the cylindrical spring 11 increases, so that the moving speed of the cylindrical spring 11 decreases. Thereby, safety at the time of lowering the telescopic pipe 2 can be ensured.

A telescopic pipe device 72 according to a fifth embodiment shown in FIGS. 8 (a) and 8 (b) is an endless ring formed in an annular shape as an alternative to the constant load spring in the above other embodiment. It is provided with two belt members 75. These belt members 75 pass through both side portions of the cylindrical spring 11 which is unwound from the first winding shaft 10 and has a reduced width, and both ends of the cylindrical spring 11 wound around the first winding shaft 10. And between the two rotating shafts 76, 76. The two rotating shafts 76 are rotatably supported by a fixing portion 77 fixed to a side wall of the base 3. Further, rollers 78, 78 as the buckling prevention means 5 are provided on the fixing portion 77,
5 and 75 are rotatably supported via a support shaft 79 at a position where they are brought to the cylindrical spring 11. Although not shown, the rotating shafts 76, 76 are connected to the belt members 75, 75 by predetermined driving means such as a handle or a motor.
It can be rotated in the direction of.

With such a configuration, the rotation shaft 7
6 and 76, the first reel 10 is rotated by frictional force, so that the cylindrical spring 11 wound around the first reel 10 can be paid out, and the first reel can be extended. 10
This is advantageous in terms of manufacturing and the like, since the operation of overlapping and winding two types of strips is eliminated.

In each of the above embodiments, the tubular spring 11 is of the "belly winding" in which the portion extended from the first winding shaft 10 is curved toward the side of the winding shaft.
In the following, the extended portion as shown in FIG.
An example is shown in which a “back-wound” tubular spring 81 curved to the opposite side is used. Also in this back-wound tubular spring 81, the angle α of the convex side formed by the center point O and both ends P and Q of the cross section of the cylindrically deformed portion is 180 to 400 °. The angle θ formed by the perpendicular from the unwinding position of the winding shaft 10 and the band 16 such as a constant load spring is 0 to 45.
°.

In a telescopic pipe device 84 according to a sixth embodiment shown in FIGS. 10 and 11, the back-wound tubular spring 81 is wound around a first winding shaft 10, and the tubular spring 8
A belt member 86 having a width smaller than that of the tubular spring 81 is used as a belt-like member for feeding out the roller 1. A roller 87 having a width corresponding to the width of the belt member 86 is provided as the buckling prevention means 5. I have. The belt member 86
One end is wound around a second winding shaft 15 formed so as to match the width of the belt member 86, and the other end is wound around the first winding shaft 10 together with the tubular spring 81.

According to the above structure, when the payout handle 28 is turned in the direction of arrow B, the belt member 86 wound around the first winding shaft 10 is wound around the second winding shaft 15 and the belt member 86 is wound. The cylinder spring 81 can be extended in the direction of arrow D. When the lock mechanism 20 is released and the rewind handle 14 is rotated in the direction of arrow A, the cylinder spring 81 is moved in the direction of arrow E.
, And the telescopic pipe 2 can be moved up and down as in the other embodiments. When the telescopic pipe 2 is directly drawn out by hand, the feeding handle 28 is omitted, and as shown in FIG. 9, a mainspring 88 is built in the second winding shaft 15 and a belt member 86 is automatically attached thereto. Can be wound up.

A telescopic pipe device 90 according to a seventh embodiment shown in FIG.
Further, one end of a belly-wound tubular spring 17 is wound around the first winding shaft 10, and the other ends of both tubular springs 11 and 17 are fixed to the tip device 6. The other end of a constant load spring 16 having one end wound around the second spool 15 is also wound around the first spool 10,
These strips 11, 17, 16 are in a triple wound state. Further, at the side end of the second winding shaft 15, there is provided a revolving heart cam 93 and a hook-shaped pin meshing with the revolving heart cam 93 as the lock mechanism 20.

According to the above configuration, the two cylindrical springs 11, 1
Since 7 supports the load, it can withstand a larger load. Further, there is an advantage that the lock mechanism 20 can be detached from the telescopic pipe 2 only by operating the telescopic pipe 2.

The telescopic pipe device 96 according to the eighth embodiment shown in FIG.
And one end of the back-wound tubular spring 81 is the first reel 1
0, and the other end sides of both the tubular springs 11 and 81 are fixed to the tip device 6, respectively. The other end of a constant load spring 16 whose one end is wound around the second spool 15 is also wound around the first spool 10, and these strips 11, 81, 16 are also wound. Are triple wound.

By combining the belly-wound tube spring 11 and the back-wound tube spring 81 as in the above configuration, the strength against buckling is further increased as compared with the seventh embodiment.
It can withstand a larger load.

Further, as the buckling preventing means 5, a trapezoidal member 33 similar to that shown in FIG. 1 is disposed at the position where the first reel 10 starts to be fed out in the base portion 3. The trapezoidal member 33 is pressed against the first reel 10 by a spring 99 having one end fixed to the side wall of the base 3 and the other end fixed to the side wall of the trapezoidal member 33.

Also in the telescopic pipe device 96 according to the eighth embodiment, a lock mechanism 20 similar to the telescopic pipe device 90 according to the seventh embodiment is provided in a portion where the second winding shaft 15 is not visible. It is provided so that a temporary stop can be performed by the orbiting heart cam.

A telescopic pipe device 102 according to a ninth embodiment shown in FIG. 14 shows an example of driving by a motor with a brake. A bellows-wound cylindrical spring 11 and a constant load spring are mounted on a first reel 10. The other end of the cylindrical spring 11 is fixed to the tip device 6, and the other end of the constant load spring 16 is wound around the second winding shaft 15.

A rotary shaft 105 is provided in the base 3 so as to be rotatable in the direction of arrow F by the driving force of a lifting motor with a brake.
06 is provided with a ratchet wheel 107 that meshes with the gear wheel 06. Further, a freewheel ratchet wheel 108 is provided on the second winding shaft 15, and the transmission member 106 connects the ratchet wheel 107 and the freewheel ratchet wheel 108. The free-hole ratchet wheel 108 engages and rotates with respect to rotation in the direction of arrow G, but idles with respect to rotation in the opposite direction.

Further, a one-way clutch 6 as a brake mechanism is attached to the roller 45 as the buckling prevention means 5.
The roller 45 rotates in the direction of arrow H but does not rotate in the opposite direction. At a position facing the roller 45 on the concave side of the cylindrical spring 11, a pressing roller 112 rotatably supported on a wall surface of the base 33 via a support shaft 111 is arranged.

According to the above configuration, by rotating the rotating shaft 105 in the direction of arrow F by the driving force of the motor, the second winding shaft 15 rotates in the direction of arrow G via the transmitting member 106. The constant load spring 16 wound around the first winding shaft 10 is wound around the second winding shaft 15, and the cylindrical spring 11 is unreeled upward accordingly, so that the tip tool 6 can be raised. On the other hand, when lowering the tip tool 6, the second
Of the transmission member 106 is disengaged from the freewheel pawl wheel 108 provided on the reel 15, so that the extended cylindrical spring 11 and the constant load spring 16 wound on the second reel 15 are disengaged.
Can be rewound on the first winding shaft 10. When the tip tool 6 is lowered, the roller 45 is prevented from rotating by the action of the one-way clutch 66, so that a frictional force is generated between the roller 45, the holding roller 112, and the constant load spring 16, and The tool 6 can be prevented from dropping sharply.

The telescopic pipe device 111 according to the tenth embodiment shown in FIG. 15 comprises a lifting rotary shaft 10 which rotates in the direction of arrow F by the driving force of the lifting motor.
5. The lowering rotating shaft 114 that rotates in the direction of arrow I by the driving force of the lowering motor, the ratchet wheel 22 fixed to the second winding shaft 15, the operating lever 117 meshing with the ratchet wheel 22, and the operating lever 117. Lift switch 11 that is switched ON / OFF according to the position
8 and a down switch 119, a contact member 122 as the brake mechanism 66, a spring 123, and a brake lever 124.

The second winding shaft 15 is provided with a ratchet 127, and is synchronized with the ascending rotary shaft 105 via a transmission wheel 106 and a pawl 107 provided on the ascending rotary shaft 105, and is indicated by an arrow G. It is made to rotate in the direction of. The first winding shaft 10 includes a ratchet wheel 128 and the transmission member 12.
9 and a ratchet wheel 130 provided on the rotating shaft 114 for lowering
And in the direction of arrow A in synchronization with the rotating shaft 114 for lowering.

The raising switch 118 and the lowering switch 119 are both OFF at normal times. When the operating lever 117 moves to the position X, the raising switch 118 turns on and the operating lever 117 moves to the position Y. Then, the down switch 119 is turned ON. When the ascending switch 118 is turned on, the signal is transmitted to the ascending motor through a predetermined electric circuit to rotate the ascending rotary shaft 105. When the ascending switch 119 is turned on, the signal is transmitted as the descending signal. The rotation shaft 114 for lowering is transmitted to the motor for rotation. When the operation lever 117 moves to the position X, the claw 25 formed at the tip of the operation lever 117 engages with the notch 21 formed in the ratchet wheel 22, and the arrow G of the second winding shaft 15.
When the operation lever 117 moves to the position Y, the engagement between the claw portion 25 and the notch 21 is released.

The brake lever 124 has a U-shape and has a bent portion formed on the outer surface of the base 3.
33 is slidably supported by the shaft. The contact member 122
Is disposed slidably along the bottom surface of the base portion 3 so as to penetrate the inside and outside of the base portion 3, has a slope portion 135 in the base portion 3, and has the lower end of the brake lever 124 outside the base portion 3 A portion has a pressing surface 136 against which the slope portion 135 is in contact with the first winding shaft 10. One end of the spring 123 is in contact with the inner wall of the base 3 and the other end is in contact with a recess 137 formed in the contact member 122. It is energizing.

According to the above configuration, the operating lever 117 is buckled and moved to the position X, whereby the lifting switch 118 is turned on, the lifting motor is driven, and the lifting rotary shaft 105 is moved in the direction of arrow F. And the second reel 15
Rotates in the direction of arrow G, and the constant load spring 16 wound around the first winding shaft 10 is wound around the second winding shaft 15, whereby the cylindrical spring 11 is extended upward and the tip tool is rotated. 6 rises. On the other hand, by moving the operation lever 117 to the position Y, the lock is released and the lowering switch 11 is moved.
9 is turned ON, the lowering motor is driven, the lowering rotary shaft 114 rotates in the direction of arrow I, the first reel 10 rotates in the direction of arrow A, and The constant load spring 16 wound around the second winding shaft 15 is wound around the first winding shaft 10, and the tip tool 6 descends.

Further, when the tip tool 6 is lowered, the brake lever 124 is pulled in the direction of arrow J, so that the contact member 122 comes into contact with the first winding shaft 10.
1 can be slowed down, and it is possible to prevent the tip device 6 from suddenly descending.

[0068]

As described above, according to the present invention, a tubular spring having a strong buckling resistance against a load is used as a member serving as a bone for supporting a telescopic pipe. The mechanism for raising the telescopic pipe and the locking mechanism can be simplified by overlapping at least a part of the tubular spring and the band-shaped body, and the telescopic pipe can be reliably and easily formed with an arbitrary length. Can be fixed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a structure of a telescopic pipe device according to a first embodiment of the present invention.

FIG. 2 is a side view showing the structure of the telescopic pipe device according to the first embodiment.

FIG. 3 is a diagram showing characteristics of a belly-wound tubular spring used in the embodiment of the present invention.

FIG. 4 is a perspective view showing a structure of a telescopic pipe device according to a second embodiment of the present invention.

FIG. 5 is a side view showing a structure of a telescopic pipe device according to a second embodiment.

FIG. 6 is a side view showing a structure of a telescopic pipe device according to a third embodiment of the present invention.

FIG. 7 is a side view showing a structure of a telescopic pipe device according to a fourth embodiment of the present invention.

FIG. 8 (a) is a side view showing a structure of a telescopic pipe device according to a fifth embodiment of the present invention, and FIG. 8 (b) is a fifth embodiment of the present invention. 1 is a front view showing a structure of a telescopic pipe device according to the first embodiment.

FIG. 9 is a diagram showing characteristics of a back-wound tubular spring used in the embodiment of the present invention.

FIG. 10 is a perspective view showing a structure of a telescopic pipe device according to a sixth embodiment of the present invention.

FIG. 11 is a side view showing a structure of a telescopic pipe device according to a sixth embodiment of the present invention.

FIG. 12 is a perspective view showing a structure of a telescopic pipe device according to a seventh embodiment of the present invention.

FIG. 13 is a side view showing a structure of a telescopic pipe device according to an eighth embodiment of the present invention.

FIG. 14 is a side view showing the structure of a telescopic pipe device according to a ninth embodiment of the present invention.

FIG. 15 is a side view showing a structure of a telescopic pipe device according to a tenth embodiment of the present invention.

FIG. 16 is a perspective view showing an example of a constant load spring used in the present invention.

[Explanation of symbols]

1,40,48,58,72,84,90,96,10
2,111 Telescopic Pipe Device 2 Telescopic Pipe 3 Base 4 Supporting Mechanism 5 Buckling Prevention Means 6 Tip 10 First Reel 11,11 Cylindrical Spring (Body Wound) 14 Rewind Handle 15 Second Reel 16 Constant load spring 20 Lock mechanism 21 Notch 22 Ratchet wheel 25 Claw 26 Lock release lever 28 Handle for feeding 31 Slid guide 33 Trapezoid member 34 Contact surface 35 Slit 36 Spring 45 Roller 51 Roller 52 Arm 53 Spring 54 Control roller 61 First No. 3 winding shaft 66 Brake mechanism 67 Wedge-shaped member 68 Spring 69 Inclined part 75 Belt member 76 Rotating shaft 77 Fixed part 78 Roller 81 Cylindrical spring (back-wound) 86 Belt member 87 Roller 93 Circulating heart cam 99 Spring 105 Lifting rotating shaft 06 Transmission member 107 Claw wheel 108 Freewheel claw wheel 112 Pressing roller 114 Lowering rotation shaft 117 Operating lever 118 Lifting switch 119 Lowering switch 122 Contact member 123 Spring 124 Brake lever 127 Claw wheel 128 Claw wheel 129 Transmission member 135 Slope Part 136 Pressing surface

Claims (13)

[Claims] 1. A telescopic pipe comprising: a plurality of pipe-shaped members having different inner diameters connected to each other so as to be expandable and contractable; and a support mechanism for supporting and fixing the telescopic pipe to an arbitrary length. In the apparatus, the support mechanism may be configured such that one end is wound around a first winding shaft and the other end is fixed to a distal end portion of the telescopic pipe, and a portion that is extended from the first winding shaft is deformed into a substantially cylindrical shape. A telescopic pipe device comprising: a band-shaped tubular spring provided with a belt-shaped member; and a band-shaped body overlapping at least a part of the tubular spring wound around the first winding shaft. 2. The telescopic device according to claim 1, wherein one end of the band is wound around the first winding shaft together with the tubular spring, and the other end is wound around a second winding shaft. Pipe equipment. 3. The belt-shaped body has one end wound around a second winding shaft, the other end wound around a third winding shaft, and an intermediate portion formed between the first winding shaft and the first winding shaft.
2. The telescopic pipe device according to claim 1, wherein said telescopic pipe device is in contact with an outer surface of a cylindrical spring wound around said winding shaft. 4. The cross-section in a width direction of a portion of the tubular spring that is unreeled from the first band-shaped body and becomes substantially tubular,
The telescopic pipe according to any one of claims 1 to 3, wherein an angle of a convex side of the tubular spring formed by a center point of the cross section and both ends of the tubular spring is 180 ° or more. apparatus. 5. The telescopic pipe device according to claim 1, wherein the band is a constant load spring. 6. The telescopic pipe device according to claim 1, wherein the band is formed in an annular shape. 7. A cylindrical spring wound around the first winding shaft,
The telescopic pipe device according to any one of claims 1 to 6, further comprising buckling prevention means for preventing the first winding shaft from being slackened radially outward. 8. The buckling preventing means further comprises: disposing the band-shaped body further outside a portion of the cylindrical spring wound around the first winding shaft that is wound on the outermost side; 8. The telescopic pipe device according to claim 7, further comprising means for shifting to a side of the reel. 9. A cylindrical spring winding interlocked with the first winding shaft and rewinding the cylindrical spring drawn out by rotating the first winding shaft in a predetermined direction to the first winding shaft. The telescopic pipe device according to claim 1, further comprising a return unit. 10. In conjunction with the second winding shaft, the second winding shaft is rotated to displace the band, and the first winding shaft is displaced by frictional force between the band and the tubular spring. The telescopic pipe device according to any one of claims 1 to 9, further comprising a cylinder spring extension means for extending the cylinder spring by rotating. 11. The telescopic pipe device according to claim 10, further comprising a lock mechanism for preventing the second winding shaft from rotating in a direction opposite to a direction in which the tubular spring is extended. 12. The telescopic pipe device according to claim 11, wherein the lock mechanism is provided on the second winding shaft. 13. The apparatus according to claim 1, further comprising a brake mechanism for reducing a moving speed of the tubular spring when the extended tubular spring rewinds around the first winding shaft. The telescopic pipe device according to one of the above.