JP2011109780A - Device and method for fixing overhead wire ladder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and properly prevent vibration of an overhead wire ladder, irrespective of skilfulness of each operator. <P>SOLUTION: A first rope 2 is attached on a free end portion 101 of the overhead wire ladder 100, a second rope 4 is attached on a steel tower member T1, and a position adjuster 6 fixed to the second rope 4 is moved and fixed by pulling a stopper 21 side of the first rope 2. In this way, a tensile stress is imparted to the ropes 2, 4. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an overhead line ladder fixing apparatus and an overhead line ladder fixing method for suppressing a swing of a free end portion of an overhead line ladder in which a base end portion of the overhead line ladder is fixed to a steel tower.

  For example, when performing inspection and maintenance work of a transmission line installed on a transmission line tower, an overhead ladder is used to secure a scaffold for the worker. As for this overhead wire ladder, a base end part is attached to a steel tower member, and the other end part side (free end part side) is supported by a power line or the like. Moreover, the attachment position and direction of the overhead line ladder can be changed according to the position of the transmission line to be inspected and maintained. And an operator performs the inspection maintenance work of a power transmission line, moving on this overhead wire ladder, or changing a posture. In this way, since the worker moves on the overhead line ladder or changes the posture, the overhead line ladder is easily shaken and becomes unstable.

  In order to improve the workability on such an overhead ladder, a technique related to an auxiliary arm for overhead ladder that extends the effective length of the overhead ladder has been proposed (for example, see Patent Document 1). This auxiliary arm for overhead wire ladder is easy to operate because the load of the operator etc. is applied to the overhead wire ladder, the power line supporting the overhead wire ladder bends vertically downward, and the distance between the tip of the overhead wire ladder and the power line is widened. It is intended to improve the deterioration. That is, the workability on the overhead line ladder is improved by extending the front end of the overhead line ladder and reducing the distance between the extended front end and the power line.

JP 2008-18295 A

  By the way, conventionally, in order to suppress and stabilize the swing of the overhead ladder, one end of the rope is tied to the free end of the overhead ladder, and the other end of the rope is tied to the tower while keeping the rope stretched. It was.

  However, with this method, the rope had to be tightly tied to the tower while pulling the rope sufficiently on the tower where the scaffolding was unstable. There was a difference in the degree of fastening of the rope. Therefore, for example, when the method of tying the rope is inappropriate, the knot of the rope may be loosened during the work. Also, when changing the installation position and direction of the overhead line ladder, it is necessary to unwind the rope tied to the steel tower, change the position and direction of the overhead line ladder, and retighten the rope while pulling the rope sufficiently, which takes a lot of time. And labor. Furthermore, considering the attachment of overhead ladders in various positions and directions, it is necessary to use long ropes. However, it is difficult to work and time is required to tie long ropes firmly.

  Accordingly, an object of the present invention is to solve the above-mentioned problems and to provide an overhead ladder fixing device capable of appropriately and easily suppressing shaking of the overhead ladder regardless of the skill level of the operator. Yes.

  In order to solve the above-mentioned problems, the invention of claim 1 is an overhead ladder fixing device that suppresses the shaking of the free end of the overhead ladder in which the base end of the overhead ladder is fixed to a steel tower, and is freely deformable. A first rope, an overhead wire ladder holding portion that is provided at one end of the first rope and is detachably attached to a free end side of the overhead wire ladder, a deformable second rope, and the first rope A tower holding part that is provided at one end of the two ropes and is detachably attached to a member of the tower, and is fixed to one of the first rope or the second rope, and the other second rope or A position adjuster that is movable and fixed in the longitudinal direction of the first rope.

  The invention according to claim 2 is a method for fixing an overhead wire ladder in which a base end portion of the overhead wire ladder is fixed to a steel tower and suppresses a swing of the free end portion of the overhead wire ladder, on the free end side of the overhead wire ladder. Attaching a deformable first rope, attaching a deformable second rope to a member of the steel tower, attaching one of the first rope or the second rope to the other second rope or A position adjuster that is movable and fixable in the longitudinal direction of the first rope is fixed, and the position adjuster is moved in the longitudinal direction of the second rope or the first rope, thereby A tension is applied to the second rope and the second rope.

  According to these inventions, by moving the position adjuster along the longitudinal direction of the second rope or the first rope, and fixing the position adjuster with these ropes stretched, Tension is applied to the rope, and the swing of the free end of the overhead ladder is suppressed.

  According to the first and second aspects of the present invention, it is possible to easily suppress the swing of the overhead ladder only by moving and fixing the position adjuster along the longitudinal direction of the second rope or the first rope. be able to. That is, it is possible to easily and appropriately suppress the swing of the overhead ladder regardless of the skill level of the operator.

  According to the first aspect of the present invention, the overhead wire ladder holding portion and the steel tower holding portion are detachable from the free end of the overhead wire ladder and the steel tower member, respectively, so that the position and direction of the overhead wire ladder are frequently changed. However, it can be easily removed and attached.

It is a perspective view which shows the state which fixed the overhead wire ladder with the overhead wire ladder fixing apparatus which concerns on Embodiment 1 of this invention. It is a front view which shows the overhead-line ladder fixing apparatus of FIG. It is a front view which shows the overhead wire ladder fixing apparatus which concerns on Embodiment 2 of this invention.

  The present invention will be described below based on the illustrated embodiments.

(Embodiment 1)
FIG. 1 is a perspective view showing a state in which an overhead ladder 100 is fixed by the overhead ladder fixing device 1 according to this embodiment. Here, the overhead line ladder 100 is a scaffold for workers used in the inspection and maintenance work of the transmission line 110 installed on the transmission line tower. In this embodiment, the overhead line ladder 100 is arranged in the horizontal direction. The case where it is attached will be described.

  The overhead wire ladder fixing device 1 is a device that suppresses shaking of the free end portion 101 of the overhead wire ladder 100, and mainly includes a first rope 2, an overhead wire ladder side hook (overhead wire ladder holding portion) 31, and a second rope. 4, a steel tower holding part 5, and a position adjuster 6.

  The first rope 2 is a deformable rope formed by strands, and the length of the first rope 2 can fix the overhead ladder 100 as will be described later, and an extra length that is easy to work with is secured. So that it is set. An overhead wire ladder side hook 31 is attached to one end of such a first rope 2, and a position adjuster 6 as will be described later is prevented from coming out of the first rope 2 at the other end. A stopper 21 is provided.

  The overhead line ladder-side hook 31 is a hook that is detachably attached to the free end 101 side of the overhead line ladder 100, and has the same configuration as an existing / off-the-shelf hook used for a safety belt, and has a hook body 31a and a locking mechanism 31b. And a safety mechanism 31c. The overhead wire ladder side hook 31 is provided with an attachment ring 31d. The attachment ring 31d is knitted to one end portion of the first rope 2, so that the overhead wire ladder side hook 31 is attached to the first rope 2. Yes. Then, the hook body 31 a is hung on the D ring 102 provided on the free end 101 side of the overhead ladder 100, whereby the locking mechanism 31 b and the safety mechanism 31 c are locked, and the overhead ladder side hook 31 is connected to the overhead ladder 100. It is attached to the free end 101 side. Moreover, the overhead wire ladder side hook 31 can be removed from the free end 101 side of the overhead wire ladder 100 by pushing the release preventing mechanism 31b and the safety mechanism 31c inward and removing the hook body 31a from the D ring 102. .

  Similar to the first rope 2, the second rope 4 is a deformable rope formed by strands, and a tower-side hook 51 is attached to one end thereof. Since this steel tower side hook 51 is the structure equivalent to the overhead ladder side hook 31, detailed description is abbreviate | omitted. Further, an 8-shaped ring 52 is attached to a substantially central portion of the second rope 4. The 8-ring 52 is a member composed of two rings, and is attached to the second rope 4 with the second rope 4 inserted into one of the rings.

  The tower holding part 5 is configured by such a tower-side hook 51, the 8-shaped ring 52, and the holding rope part 53 of the second rope 4 located between the tower-side hook 51 and the 8-shaped ring 52. ing. That is, in the state where the holding rope portion 53 is opposed to the steel tower member (members such as the armor main material, main pillar material, and diagonal material of the steel tower) T1, as shown by the arrow Y1 in FIG. The hook 51 side is bent into a U shape. And the steel tower member T1 is wound in with the holding rope part 53, and the steel tower side hook 51 is hung on the other ring of the 8-shaped ring 52, and the steel tower holding part 5 is attached to the steel tower member T1. Moreover, the tower holding part 5 can be removed from the tower member T1 by removing the tower side hook 51 from the 8-shaped ring 52 and removing the holding rope part 53 from the tower member T1.

  The position adjuster 6 is fixed to the second rope 4 and is movable and fixable in the longitudinal direction of the first rope 2, and has the same configuration as an existing expansion / contraction adjuster used for a safety belt. ing. That is, it is composed of a rope holding part 61 into which the first rope 2 is inserted and an operation part 62 connected to the rope holding part 61 by a link. A fixed piece (not shown) is disengaged from the first rope 2, and the first rope 2 can move in the rope holding portion 61. That is, the position adjuster 6 can move with respect to the second rope 4. When the grip of the operation unit 62 is released, the rope fixing piece presses the first rope 2 and the movement of the first rope 2 is restricted, that is, the position adjuster 6 is fixed to the first rope 2. It has become so. Such a position adjuster 6 is attached to the other end portion of the second rope 4 so as to freely swing (swing).

  Next, the operation of the overhead line ladder fixing apparatus 1 having such a configuration and the overhead line ladder fixing method according to this embodiment will be described. Here, as shown in FIG. 1, the overhead ladder 100 is assumed to have a base end fixed to a steel tower member T <b> 1 and a free end 101 side supported by a power transmission line 110.

  First, the overhead line ladder side hook 31 is attached to the D ring 102 on the free end 101 side of the overhead line ladder 100. Note that this attachment work may be performed on the ground before the overhead ladder 100 is disposed. Next, as described above, the steel tower member T1 is wound by the holding rope part 53, and the steel tower side hook 51 is hung on the 8-shaped ring 52, so that the steel tower holding part 5 is attached to the steel tower member T1. At this time, the fixed position of the position adjuster 6 is adjusted so that the first rope 2 and the second rope 4 are loosened.

  In this state, the stopper 21 side of the first rope 2 is pulled while grasping the operation part 62 of the position adjuster 6. As a result, the position adjuster 6 moves along the first rope 2 toward the overhead ladder-side hook 31 (in the direction indicated by the arrow Y2 in FIG. 2). With this movement, the first rope 2 (position adjuster) is moved. 6 and the stopper 21 are removed) and the second rope 4 is pulled (tension is applied). When the position adjuster 6 cannot be moved, that is, when sufficient tension is applied to the first rope 2 and the second rope 4, when the grip of the operation unit 62 is released, the position adjustment is performed. The vessel 6 is fixed to the first rope 2 and the tension applied to the first rope 2 and the second rope 4 is maintained. In this way, the swing of the free end portion 101 of the overhead ladder 100 is suppressed by the first rope 2 and the second rope 4 to which tension is applied.

  Next, when removing the overhead line ladder 100, that is, when releasing the fixation by the overhead line ladder fixing device 1, first, the position adjuster 6 is moved to the first rope 2 while grasping the operation part 62 of the position adjuster 6. Are moved toward the stopper 21 (in the direction of arrow Y3 in FIG. 2). Thereby, the tension | tensile_strength of the 1st rope 2 and the 2nd rope 4 is cancelled | released, and the ropes 2 and 4 loosen. Then, with the ropes 2 and 4 loosened to some extent, the tower holding part 5 is removed from the tower member T1 as described above, and the overhead ladder-side hook 31 is removed from the D ring 102 of the overhead ladder 100.

  As described above, according to the overhead line ladder fixing device 1 and the overhead line ladder fixing method, the first rope 2 and the second rope 2 can be moved only by pulling the stopper 21 side of the first rope 2 and moving the position adjuster 6. The rope 4 can be tensioned. That is, it is possible to prevent and stabilize the swing of the overhead ladder 100 easily and appropriately regardless of the skill level of the operator. In addition, even if the ropes 2 and 4 are long, the workability is not deteriorated because only the stopper 21 side of the first rope 2 is pulled.

  Moreover, since it is not necessary to tie the 1st rope 2 and the 2nd rope 4, work is easy and stability of the overhead wire ladder 100 can be improved. Moreover, since the overhead wire ladder side hook 31 and the tower holding portion 5 are detachable from the D ring 102 and the steel tower member T1 of the overhead line ladder 100, respectively, the position and direction of the overhead line ladder 100 are frequently changed. However, the work can be performed easily and quickly. Although the case where the overhead line ladder 100 is attached in the horizontal direction has been described, even when the overhead line ladder 100 is attached in the vertical direction, it can be fixed by the overhead line ladder fixing device 1.

(Embodiment 2)
FIG. 3 is a front view showing the overhead ladder fixing device 10 according to this embodiment. In this embodiment, the overhead line ladder holding unit 3 is composed of the overhead line ladder side hook 31, the third rope 32, and the connection ring 33, and is thus configured with the overhead line ladder fixing device 1 of the first embodiment. Is different. In addition, about the structure equivalent to Embodiment 1, the description is abbreviate | omitted by attaching | subjecting the same code | symbol.

  Similarly to the ropes 2 and 4, the third rope 32 is a deformable rope formed by a strand, and an overhead ladder ladder hook 31 is attached to one end (free end). The other end of the third rope 32 is connected to one end of the first rope 2 via an annular connection ring 33.

  Then, in a state where the third rope 32 is opposed to the members (stepping plates and side plates) of the overhead line ladder 100, the overhead line ladder side hook 31 side of the third rope 32 is bent in a U shape as shown by an arrow Y4. . Then, the member of the overhead wire ladder 100 is wound with the third rope 32 and the overhead wire ladder side hook 31 is hung on the connection ring 33, whereby the overhead wire ladder holding portion 3 is attached to the free end 101 side of the overhead wire ladder 100. Thus, according to this embodiment, even if the overhead ladder 100 is not provided with the D-ring 102, the overhead ladder 100 can be fixed by the overhead ladder fixing device 10.

  Although the embodiments of the present invention have been described above, the specific configuration is not limited to these embodiments, and even if there is a design change or the like without departing from the gist of the present invention, Included in the invention. For example, the ropes 2, 4, and 32 may be long materials that do not expand and contract, such as cables, chains, and belts, or may be formed by connecting a plurality of long materials. Further, the tower-side hook 51 may have an inner circumference larger than the outer circumference of the tower member T1, and the tower-side hook 51 may be directly hooked (attached) to the tower member T1. That is, you may comprise a tower holding part only with the tower side hook 51. FIG. Furthermore, the overhead wire ladder holding part 3 and the steel tower holding part 5 may be constituted by rope-like members, and this rope-like member may be tied to the overhead wire ladder 100 or the steel tower member T1. Alternatively, the tower-side hook 51 may be directly hung on the second rope 4 without providing the 8-shaped ring 52.

DESCRIPTION OF SYMBOLS 1 Overhead ladder fixing apparatus 2 1st rope 3 Overhead ladder holding part 4 Second rope 5 Tower holding part 6 Position controller 31 Overhead ladder side hook 32 Third rope 33 Connection ring 51 Tower side hook 52 Eight ring 53 Holding rope part T1 Steel tower member 100 Overhead ladder 101 Free end part 102 D ring 110 Transmission line

Claims (2)

An overhead wire ladder fixing device that suppresses shaking of a free end portion of the overhead wire ladder in which a base end portion of the overhead wire ladder is fixed to a steel tower,
A deformable first rope;
An overhead line ladder holding part provided at one end of the first rope and detachably attached to a free end side of the overhead line ladder;
A deformable second rope;
A tower holding part provided at one end of the second rope and detachably attached to a member of the tower,
A position adjuster fixed to one of the first rope or the second rope and movable and fixed in the longitudinal direction of the other second rope or the first rope;
By moving the position adjuster in the longitudinal direction of the second rope or the first rope, a tension can be applied to the first rope and the second rope.
An overhead ladder fixing device characterized by that. An overhead wire ladder fixing method for suppressing shaking of a free end portion of the overhead wire ladder in which a base end portion of the overhead wire ladder is fixed to a steel tower,
A deformable first rope is attached to the free end side of the overhead ladder, and a deformable second rope is attached to the steel tower member.
A position adjuster that is movable and fixable in the longitudinal direction of the other second rope or the first rope is fixed to one of the first rope or the second rope,
Applying tension to the first rope and the second rope by moving the position adjuster in a longitudinal direction of the second rope or the first rope;
An overhead wire ladder fixing method characterized by that.

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