JPH1118226A - Expansion rod device and method for expanding/ contacting expansion body of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for expanding/contracting an expansion body by which such work can be carried out easily from the ground surface such that a rack tool connected with a rope can be hooked on a suspended overhead wire for taking a safety measure, when a worker conducts work on a pole for conducting telephone line installing work, etc. SOLUTION: An expansion rod device A is provided with an expansion body 2 equipped with a housing base body 1 and four nested members 20, 21, 22, and 23 and a screw rod 3 which is inserted into the expansion body 2, rotated in the normal and reverse directions by means of a drive motor M, and has a required length. The nested members 20-23 of the expansion body 2 have long nuts 25, which are engaged with the thread section 32 of the rod 3. When the rod 3 is rotated in the normal direction, the expansion body 2 is elongated, because the thread section 32 of the rod 3 is moved in a state, where the section 32 is successively engaged with the long nuts 25 of the nested members 20-23 from the member 23 having the smallest diameter. When the rod 3 is rotated in the reverse direction, the expansion body 2 is contracted, because the tread section 32 is moved in a state, where the section 32 is successively engaged with the nuts 25 of the members 20-23 from the member 20 having the largest diameter. The coupling and decoupling of the members 2-23 re performed by means of locking devices 4, when the expansion body 2 is elongated and contracted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telescopic rod device and a method for expanding and contracting a telescopic body in the telescopic rod device. In more detail, when performing work at heights such as telephone line construction, a safety rope to prevent workers from falling down when working on and off poles or while working on poles is to be hooked on a suspension line (strand). The present invention relates to a telescopic rod device and a telescopic method of the telescopic body in the telescopic rod device.

[0002]

2. Description of the Related Art For example, in telephone line construction, work is performed on pillars. At that time, the height of the work place is 5
m and it is very dangerous to fall down. Therefore, a work vehicle equipped with a work box at the tip of a crane is usually used. However, depending on the work place, the work vehicle may not be able to enter, and in such a case, measures have been taken to prevent the worker from falling during the work. One is a method in which a rope that can be attached to and detached from both ends of a worker's waist is wrapped around a utility pole. However, this method has a drawback in that it is necessary to move the height of the rope in small increments when the worker goes up and down, so it takes time to go up and down, and there is a drawback that it is not possible to go up and down quickly.

[0003] Therefore, as another method, a method is employed in which a hook connected to a rope is hooked on a suspension wire installed between utility poles using a telescopic rod, and the rope is connected to an operator. When the worker goes up and down, the hook sends the rope upward or downward so that the rope does not loosen greatly, and when an instantaneous large load is applied to the rope downward, The rope is locked so as not to move to prevent the worker from falling.

[0004]

However, the above-mentioned operation of hooking a hook connected to a rope on a suspension wire using a telescopic rod has the following problems.
That is, the telescopic rod used has the same nest structure as the fishing rod. The telescopic operation of the telescopic rod is performed manually, but since each nesting member has a considerable weight, the telescopic rod is set up, and the telescopic rod is further upwardly mounted with a hook at the tip. It is difficult to extend to, and usually, the telescopic operation is performed in a state where it is placed on the ground. For this reason, in order to hook the hook on the hanging overhead line, it is necessary to attach the hook to the tip of the elongated telescopic rod and raise or lower the telescopic rod in this state. Also,
In the state where the telescopic rod is extended, coupled with the weight of the hook,
Since the moment of the force in the falling direction is large, it is easy to fluctuate, and it is impossible for one worker to stably carry out the work of hanging the hook on the overhead wire from the ground. Especially,
When there is a wind, the work is difficult, for example, there is a danger of contact with a passing car or a pedestrian. For this reason, the above-mentioned safety measures tend not to be enforced at the site, and as a result, the fall accident of the worker does not stop.

The present invention solves the above-mentioned problems. For example, when performing work on a pole in telephone line construction or the like, work performed as a safety measure for workers, that is, a hook connected with a rope is provided at a high place. An object of the present invention is to provide a telescopic rod device and a method of expanding and contracting a telescopic body in the telescopic rod device, which makes it possible to easily perform a work to be hooked on a suspended overhead line from the ground.

[0006]

Means of the present invention taken to achieve the above object are as follows. According to the first invention, there is provided a telescopic rod device, comprising: a housing base; a telescopic body having a telescopic structure housed in the housing base; and telescopic means for expanding and contracting the telescopic body by an electric motor. A telescopic rod device comprising:

According to a second aspect of the present invention, there is provided a telescopic rod device, wherein the telescopic body is provided with a telescopic body having a plurality of telescopic members, the telescopic body being housed in the telescopic body, and being inserted through the telescopic body. , A screw rod of a required length that is driven to rotate in the forward and reverse directions by the driving means,
The screw rod has a threaded portion that is screwed with the threaded portion. When the screw rod is rotated forward, the threaded portion is sequentially threadedly engaged with the threaded member from the small-diameter nest member to move the elastic body. The telescopic rod device is characterized in that the telescopic body is contracted by screwing and moving a screwing part from a telescopic member having a large diameter to a screw part in order to extend and reverse the screw rod.

In the third aspect, when the nesting member moves in a direction in which the nesting member extends, the nesting member and the nesting member are fitted before the threaded portion comes off the threaded portion of the screw rod. When the nested member is moved in the direction in which the nested member contracts, the nested member and the nested member are fitted to the nested member before the screw portion is disengaged from the threaded portion of the screw rod. A telescopic rod device according to a second aspect of the present invention, comprising means for releasing a connection with another nesting member.

In a fourth aspect, the nesting member is
A telescopic rod device according to the second or third invention, characterized in that the telescopic rod device is formed in a polygonal cylindrical shape.

According to a fifth aspect of the present invention, in the above-mentioned nesting member, a hooking device to which a cordage is connected is detachably attached to a position which becomes a tip when extended. And a telescopic rod device according to the third or fourth invention.

According to a sixth aspect of the present invention, there is provided a housing base, an elastic body housed in the housing base, and having a plurality of nesting members, inserted through the elastic body, and driven in a forward / reverse direction by driving means. A method of expanding and contracting an elastic body in a telescopic rod device provided with a screw rod of a required length that is driven to rotate, by rotating the screw rod, and sequentially screwing a threaded portion from a small-diameter nested member to a screw portion of the screw rod. The telescopic body is stretched by screwing and moving, the screw rod is rotated in the reverse direction, and the telescopic body is contracted by screwing and moving the screwing portion sequentially from the large-diameter nested member to the screw portion of the screw rod. A method for expanding and contracting an elastic body in an elastic rod device.

The polygonal tubular shape is, for example, a triangular tubular shape, a square tubular shape, a pentagonal tubular shape, etc., and is not particularly limited.
According to trials, the triangular cylindrical shape seems to have the best structural strength against bending. As described above, the telescopic rod device is used as a safety measure for workers during pole work in telephone line construction etc., that is, in addition to the work of hooking a hook with a rope on a hanging overhead line at a high place. However, the present invention can also be used for various other works intended for high-place work, for example, by attaching a storage basket and exchanging articles with a worker at a high place.

(Operation) In the telescopic rod device according to the first aspect of the present invention, the telescopic device is placed upright on the ground, the telescopic body is extended upward by telescopic means driven by an electric motor, and the hook is hooked on the hanging overhead line. Can be easily done. in this way,
The telescopic rod device can automatically extend and retract the telescopic body in the upright position from the beginning, so it can be used to extend or collapse a long-stretched telescopic rod like a conventional telescopic telescopic rod. No work is required. Therefore, the work is easy because the elastic body does not easily wobble, and even a single worker can stably perform the work of hooking the hook connected to the rope on the hanging overhead line at a high place from the ground. In addition, even when there is some wind, the danger of contact with a passing car or pedestrian can be reduced.

In the telescopic rod device according to the second invention,
The telescopic body can be stretched by rotating the screw rod in the normal direction and screwing and moving the screwing portion sequentially from the small-diameter nest member to the screw portion. In addition, the screw rod is rotated in the reverse direction, and the screwing portion is sequentially screwed into the screw portion from the nested member and moved to shrink the elastic body. In this way, the telescopic body can be expanded and contracted by rotating the screw rod in the forward and reverse directions by, for example, electric or manual driving means. That is, since the expansion and contraction of the telescopic body can be performed by the driving means, there is no need to work up or down a long-stretched telescopic rod as in the case of a conventional manual telescopic type telescopic rod. Therefore, the work is easy because the elastic body does not easily wobble, and even a single worker can stably perform the work of hooking the hook connected to the rope on the hanging overhead line at a high place from the ground. In addition, even when there is some wind, the danger of contact with a passing car or pedestrian can be reduced.

In the telescopic rod device according to the third invention,
When the nesting member moves in the extending direction, the nesting member is connected to another nesting member fitted to the nesting member before the screwing portion is disengaged from the threaded portion of the screw rod, and the nesting member is connected. Means are provided for releasing the connection between the nesting member and another nesting member fitted to the nesting member before the threaded portion is disengaged from the threaded portion of the screw rod when the member moves in the contracting direction. Therefore, only one nest member is directly moved by the screw rod when the telescopic body is expanded and contracted. In other words, the expansion and contraction structure is simplified, the size and weight are reduced, and the manufacturing cost is reduced.

In the telescopic rod device according to the fourth invention,
Since the telescopic member is formed in a polygonal cylindrical shape,
For example, when the same material and the same weight are used, the nesting member is harder to bend than a cylindrical member. That is, for example, when a triangular cylinder is bent in a certain direction, a force to bend in the width direction acts on at least two plate members out of the three surfaces. However, the flat plate member is extremely resistant to bending in the width direction. Therefore, the triangular cylinder does not easily bend unlike a cylindrical one having no flat plate portion.

In the telescopic rod device according to the fifth invention,
Of the nesting members, a hook that is connected with a cordage is detachably attached to the position that will be the tip when extended, so, for example, when working on a pole in telephone wire construction, etc., safety measures for workers This is useful when performing an operation performed as described above, that is, an operation of hooking a hook connected to a rope on a hanging overhead line at a high place.

[0018]

Embodiments of the present invention will be described in more detail with reference to the drawings. FIG. 1 is a perspective view of the telescopic rod device according to the present invention, FIG. 2 is a plan view of the telescopic rod device shown in FIG.
FIG. 4 is a longitudinal sectional view of the telescopic rod device shown in FIG. 1, FIG. 4 is an explanatory diagram of a connecting device provided on the telescopic member, and FIG. 5 is an explanatory diagram showing a structure of a telescopic member bottom provided with a screw fastener. 6 is a perspective view showing the structure of the hook.

Reference numeral A denotes a telescopic rod device, which includes a housing base 1, a telescopic body 2, a screw rod 3, and a drive motor M. The housing base 1 is formed in a substantially cylindrical shape by a synthetic resin. A notch 10 is provided in a wall portion on the distal end side of the housing base 1 so that a lock device 4 provided in nesting members 21, 22, 23 to be described later projects outside. The lock device 4 is attached to the wall slightly below the notch 10.

The structure of the lock device 4 will be described with reference to FIG. FIG. 4A is an external view showing a state in which a lock pin protrudes from an access hole, FIG. 4B is a cross-sectional view showing an internal structure,
FIG. 4C is an external view of a state where the lock pin is pulled into the access hole. The lock device 4 includes an inverted bottomed cylindrical outer cylinder 40 fixed to the wall 11 of the housing base 1. An inverted L-shaped guide groove 46 is provided in a wall portion of the outer cylinder 40 near the fixing side. The wall 11 is provided with an access hole 12 therethrough.

A slide body 41 is slidably housed inside the outer cylinder 40, and the slide body 41 is urged toward the wall 11 by a compression spring. Slide body 41
Is provided with a large-diameter sliding portion 43 and a small-diameter lock pin 44 provided at the distal end thereof. An operation pin 45 is provided on an outer wall of the sliding portion 43. Slide body 41
The operation pin 45 is inserted into the guide slot 46, and the lock pin 44 is inserted into the access hole 12 and housed in the outer cylinder 40. According to this structure, when the operation pin 45 is positioned in the vertical groove portion of the guide slot 46, the lock pin 44 projects from the access hole 12 (see FIG. 4A), and the operation pin 45 is connected to the guide slot 46. When the lock pin 44 is located in the lateral groove, the lock pin 44 is drawn into the access hole 12 (see FIG. 4C). The lock device 4 provided on the housing base 1 is provided with a later-described nesting member 23.
When is raised, the lock pin 44 is inserted and locked in the locking hole 28.

A drive motor M is provided at the base end of the housing base 1.
Is housed. At the base end of the housing base 1, a battery housing 5 is further provided, and a battery 50 is provided inside.
Is housed. Further, outside the battery accommodating section 5, an up switch 51 and a down switch 52 are provided.

A drive motor M is provided on the base end side of the housing base 1.
, A bearing member 6 is provided. Drive motor M
The rotating shaft MS is directed toward the inside of the housing base 1, and a screw rod 3 is connected to the tip of the rotating shaft MS in the bearing member 6. The screw rod 3 is rotationally driven in forward and reverse directions by a drive motor M. The length of the screw rod 3 is set to a length such that the distal end projects slightly from the distal end of the housing base 1 (see FIG. 3). The screw rod 3 is provided with a guide portion 30 having a length of about ４ of the total length and not provided with a screw at the base portion side, and a guide portion 31 also provided with no screw at the distal end portion. is there. A screw portion 32 is provided between the guide portions 30 and 31.

An elastic body 2 is accommodated in the accommodation base 1 with a screw rod 3 inserted therethrough. The elastic body 2 includes four triangular cylindrical nest members 20, 21, 22, and 23. The telescopic member 2 has a nest member 2 having the largest cylinder diameter.
In FIG. 3, nest members 22, 21, and 20 having sequentially smaller tube diameters are sequentially accommodated. Nesting members 20, 21, 22, 23
Can be mutually moved by sliding with adjacent nest members. In addition, the nesting members 20, 21, 22, 23
Is formed by bonding a wooden board, but if the strength is sufficient, other materials such as synthetic resin and metal can be used.

Inside the base end of the nesting member 20, a bottom member 24 is provided.
A long nut 25 is provided at the center of the bottom member 24.
Is installed vertically. The long nut 25 can be screwed into the screw portion 32 of the screw rod 3. A fitting member 26 is provided inside the distal end of the nesting member 20. The guide part 31 of the screw rod 3 is provided at the center of the fitting member 26.
Is provided with an insertion hole 27. A hook hole 28 into which a lock pin 44 of the lock device 4 described later is inserted and hooked is provided through a wall portion on the base side of the nesting member 20.

A holding tube 29 for inserting and holding the hook 9 is attached to the distal end of the nesting member 20. The holding tube 29 is substantially cylindrical, but is provided with a groove 29a over the entire length in the vertical direction. After the hook 29 is hooked on the hanging overhead wire, the groove 29a is moved from the hook 9 to the holding tube 2.
9 to make it easier to remove. The structure of the hook 9 will be described with reference to FIG. The hook 9 is formed of a single metal wire having elasticity or flexibility and having a strength enough to withstand an impact load when a person falls. The hook 9 has hook portions 91 and 92 whose hooking directions are opposite to each other, and the hook portions 91 and 92 have curved portions 9 bulging outward.
3, 94. By pressing the curved portions 93 and 94 from both sides to reduce the interval, the interval between the hook portions 91 and 92 is increased (see FIG. 7).

The nesting member 20 is housed in the nesting member 21. A bottom member 24 is provided inside the base end of the nesting member 21, similarly to the nesting member 20, and a long nut 25 is attached to the center of the bottom member 24 in the vertical direction. A lock device 4 having the same structure as the lock device 4 provided on the housing base 1 is attached to the distal end side portion of the nesting member 21. Lock pin 4 of slide body 41 of lock device 4
Reference numeral 4 denotes a configuration in which the insertion member 20 is inserted and latched in a retaining hole 28 provided on the base side of the insertion member 20 by rising.

The nesting member 21 is housed in the nesting member 22, and the nesting member 22 is housed in the nesting member 23. The nesting members 22 and 23 differ from each other only in the diameter of the cylinder. The structure including the bottom member 24, the long nut 25, and the lock device 4 is the same as the nesting member 2
Same as 1. In other words, the lock pin 44 of the lock device 4 of the nesting member 22 is inserted and hooked into the hook hole 28 when the nesting member 21 rises, and the lock pin 44 of the lock device 4 of the nesting member 23 is When the nest member 22 rises, it is inserted and latched in the latch hole 28.

(Operation) FIG. 7 is a longitudinal sectional view showing a state in which the nesting member at the center of the telescopic member moves upward, and the screwing tool of the next nesting member is screwed with the screw portion of the screw rod. FIG. 8 is an explanatory view showing a state where the hook is attached to the holding tube. The operation of the telescopic rod device of the present invention will be described with reference to FIGS. First, at a work place, the telescopic rod device A is set in a state where the telescopic body 2 is stored in the storage base 1 as shown in FIG. In some cases, it may be placed upright on the ground or on a table. Holding tube 29
, A hook 9 to which a wire rope 90 is connected is inserted in advance (see FIGS. 7 and 8). In addition, each of the nest members 21, 2
The operation pin 45 is positioned in the vertical groove of the guide slot 46, and the distal end of the lock pin 44 is pressed against the inner nest member surface with the slide body 41 of the lock device 4 provided on the housing base 1 and 2 and 23. To be able to

When the raising switch 51 is turned on, the drive motor M operates and the screw rod 3 rotates in the forward direction. The nesting member 20 at the center of the elastic body 2 is a long nut 25 at the bottom.
Is screwed with the threaded portion 32 of the threaded rod 3 and rises. The other nesting members 21, 22, 23 are the long nuts 2 at the bottom.
5 does not move because it is not screwed with the screw portion 32 of the screw rod 3. The nesting member 20 rises and the locking hole 2 in the base is raised.
When the lock member 4 reaches the position of the lock device 4 of the nesting member 21, the lock pin 44 is automatically inserted into the lock hole 28 and locked.

When the lock pin 44 is hooked in the hook hole 28, the nesting member 20 and the nesting member 21 are integrally pulled up. When the nesting member 21 is pulled up, the long nut 25 at the bottom of the nesting member 21 is screwed with the threaded portion 32 of the screw rod 3, and then immediately screwed with the threaded portion 32 of the long nut 25 of the nesting member 20. The disengagement occurs and the nest members 20, 2
1 rises together. Similarly, the nesting member 22
Then, the nesting member 23 is sequentially raised on the drive side. When the nesting member 23 is raised and the lock pin 44 of the lock device 4 of the housing base 1 is inserted into and latched in the retaining hole 28, the elevation switch 51 is turned off. In this state, the length of the elastic body 2 is the longest. In addition, it is also possible to stop the drive motor M halfway and use the telescopic body 2 in a short state.

Then, by operating the telescopic rod device A, the hook 9 of the hook 9
The gaps between the first and second hooks 91 and 92 are inserted.
Is twisted 90 ° and pulled down when the tip of the cable becomes higher than the suspended overhead wire, and the hook 9 is hooked. Further, the lock of the lock device 4 of the housing base 1 by the lock pin 44 is released, and the lowering switch 52 is turned on. The screw rod 3 rotates in the opposite direction, and the nesting members 20, 21, 22, and 23 begin to descend. As a result, the hook 9 is disengaged from the holding tube 29, the interval between the hook portions 91 and 92 of the hook 9 is reduced, and the hook 9 is not easily detached from the suspension wire. Further, the wire rope 90 can be removed through the groove 29a.

The lock pin 44 of each lock device 4
The unlocking members 22, 21, 20
Are sequentially accommodated in the accommodation base 1, and the elastic body 2 is contracted to the state shown in FIG. As described above, the elastic body 2 can be expanded and contracted by rotating the screw rod 3 in the forward and reverse directions by the drive motor M. That is, the elastic body 2
Since the expansion and contraction of the arm is automated, it can be expanded and contracted in an upright state unlike the conventional manual expansion and contraction rod. Therefore, in work on poles such as telephone line construction,
When the work performed as a safety measure for the worker, that is, the work of hooking the hook 9 to which the wire rope 90 is connected on a hanging overhead line at a high place from the ground, the erecting body 2 is set up or down in a state of being extended for a long time. It is not necessary to work, and it is easy to work even when the wind is strong.

The terms and expressions used in the present specification are for explanation only, are not restrictive, and do not exclude terms and expressions equivalent to the above-mentioned terms and expressions. Further, the present invention is not limited to the illustrated embodiment, and various modifications are possible within the scope of the technical idea.

[0035]

The present invention has the above configuration and has the following effects. (A) In the telescopic rod device according to the first aspect, the device can be easily set upright on the ground, and the telescopic body can be easily stretched upward by telescopic means driven by an electric motor, and the hook can be easily hooked on the hanging wire. . In this way, the telescopic rod device can automatically extend and retract the telescopic body in the upright state from the beginning, so that it can be extended like a conventional manual telescopic telescopic rod. No work is needed to knock it down. Therefore, the work is easy because the elastic body does not easily wobble, and even a single worker can stably perform the work of hooking the hook connected to the rope on the hanging overhead line at a high place from the ground. In addition, even when there is some wind, the danger of contact with a passing car or pedestrian can be reduced. As a result, the tendency that safety measures at the site are not enforced in the related art is stopped, and as a result, it is expected that the number of fall accidents of the worker is reduced.

(B) In the telescopic rod device according to the second aspect, the screw rod is rotated forward, and the screw portion is sequentially screwed into the screw portion from the small-diameter nesting member to be moved. Can be extended. Also, reverse the screw rod,
The telescopic body can be contracted by sequentially screwing and moving the screwing portion from the inner diameter member to the screw portion. In this way, the telescopic body can be expanded and contracted by rotating the screw rod in the forward and reverse directions by, for example, electric or manual driving means. That is, since the expansion and contraction of the telescopic body can be performed by the driving means, there is no need to work up or down a long-stretched telescopic rod as in the case of a conventional manual telescopic type telescopic rod. Therefore, the work is easy because the elastic body does not easily wobble, and even a single worker can stably perform the work of hooking the hook connected to the rope on the hanging overhead line at a high place from the ground. In addition, even when there is some wind, the danger of contact with a passing car or pedestrian can be reduced. The method of expanding and contracting the telescopic body in the telescopic rod device according to claim 6 has substantially the same effect.

(C) In the telescopic rod device according to the third aspect, when the nesting member moves in the extending direction, the nesting member and the nesting member are inserted before the screwing portion comes off the threaded portion of the screw rod. When the nested member is moved in the contracting direction, the nested member and the nested member are connected before the threaded portion is disengaged from the threaded portion of the screw rod when the nested member moves in the contracting direction. Since there is a means for releasing the connection with the other nested member fitted, only one nested member is directly moved by the screw rod when the telescopic body is expanded and contracted. In other words, the expansion and contraction structure is simplified, the size and weight are reduced, and the manufacturing cost is reduced.

(D) In the telescopic rod device according to the fourth aspect, since the telescopic member of the telescopic body is formed in a polygonal cylindrical shape, for example, when the same material and the same weight are used, the telescopic member is inserted. The member is harder to bend than a cylindrical member. That is, for example, when a triangular cylinder is bent in a certain direction, a force to bend in the width direction acts on at least two plate members out of the three surfaces. However, the flat plate member is extremely resistant to bending in the width direction. Therefore, the triangular cylinder does not easily bend unlike a cylindrical one having no flat plate portion.

(E) In the telescopic rod device according to the fifth aspect, since the hooking member to which the cordage is connected is detachably attached to the position of the telescopic member which becomes the tip when extended. For example, it is useful when performing a work on a pole in telephone line construction or the like as a safety measure for an operator, that is, a work in which a hook connected with a rope is hooked on a hanging overhead line at a high place.

[Brief description of the drawings]

FIG. 1 is a perspective view of a telescopic rod device according to the present invention.

FIG. 2 is a plan view of the telescopic rod device shown in FIG.

FIG. 3 is a longitudinal sectional view of the telescopic rod device shown in FIG.

FIG. 4 is an explanatory view of a lock device provided on a telescopic member.

FIG. 5 is an explanatory view showing a structure of a bottom portion of a telescopic member provided with a screwing tool.

FIG. 6 is a perspective view showing the structure of a hook.

FIG. 7 is a vertical cross-sectional view showing a state in which a telescopic member at the center of the telescopic body moves upward, and a screwing tool of the next telescopic member is screwed with a screw portion of a screw rod.

FIG. 8 is an explanatory view showing a state where the hook is attached to the holding tube.

[Explanation of symbols]

 A Telescopic rod device 1 Housing base 10 Notch part 11 Wall part 12 Inlet / outlet hole 2 Elastic body 20, 21, 22, 23 Nesting member 24 Bottom member 25 Long nut 26 Fitting member 27 Insertion hole 28 Hook hole 29 Holding tube 29a Groove part 3 Screw rod 30, 31 Guide part 32 Screw part 4 Lock device 40 Outer cylinder 41 Slide body 42 Compression spring 43 Sliding part 44 Lock pin 45 Operation pin 46 Guide groove M Drive motor MS Rotary shaft 5 Battery housing part 50 Battery 51 Up switch 52 Down switch 6 Bearing member 9 Hooks 91, 92 Hooks 93, 94 Bends 90 Wire rope

 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Noboru Tagami 1-6-1402, Shonan-cho, Hakata-ku, Fukuoka City, Fukuoka Prefecture

Claims (6)

[Claims] A telescopic rod device, comprising: a housing base (1); and a telescopic body having a nested structure housed in the housing base (1).
(2), expansion and contraction means for expanding and contracting the expandable body (2) by an electric motor,
A telescopic rod device, comprising: 2. A telescopic rod device, comprising: a housing base (1); and a plurality of nest members (20, 20) housed in the housing base (1).
21, 22 and 23), and a screw rod (3) of a required length that is inserted through the elastic body (2) and is driven to rotate in the forward and reverse directions by a driving unit. Each of the telescopic members (20, 21, 22, 23) of the telescopic body (2) has a threaded portion to be threadedly engaged with the threaded portion (32) of the threaded rod (3). At the time of forward rotation of (3), the telescopic body (2) is extended by screwing the screw portion (32) into the screw member (32) in order from the smaller diameter member and moving the screw. Department
The telescopic rod device according to (32), wherein the telescopic body (2) is contracted by screwing and moving the screwing portion sequentially from the large-diameter nest member. 3. The nesting member and the nesting member are fitted to the nesting member before the screwing portion is disengaged from the threaded portion of the threaded rod when the nesting member moves in the extending direction. When the above-mentioned nesting member is moved in the contracting direction, the nesting member and the nesting member are moved before the threaded portion comes off the threaded portion (32) of the screw rod (3). 3. The telescopic rod device according to claim 2, further comprising means for releasing a connection with another nesting member fitted to the member. 4. The telescopic rod device according to claim 2, wherein said nesting member (20, 21, 22, 23) is formed in a polygonal cylindrical shape. 5. A hooking device (9) to which a cordage is connected is detachably attached to a position of the telescopic member which becomes a tip when extended. 4. The telescopic rod device according to 4. 6. An accommodating base (1), an elastic body (2) accommodated in the accommodating base (1), and provided with a plurality of nesting members (20, 21, 22, 23). A screw rod (3) of a required length that is inserted through the body (2) and is rotationally driven in the forward and reverse directions by the driving means
A method of expanding and contracting the telescopic body in a telescopic rod device comprising the following steps: rotating the screw rod (3), and screwing a threaded portion from a small-diameter nest member to a screw portion (32) of the screw rod (3) in order. The telescopic body (2) is extended by moving the screw rod (3) in the reverse direction, and the screw part (32) of the screw rod (3) is screwed into the screw part (32) of the screw rod (3) sequentially from the large-diameter nest member. A method of expanding and contracting an elastic body in an elastic rod device, wherein the elastic body (2) is contracted by moving the elastic body.