JPH0425876Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a work safety device for the tip of a cross arm in a power transmission tower.

(Prior technology) Safety equipment to prevent workers from falling at the tip of the arm of a power transmission tower is extremely important, and in most recent designs, handrails and footrails are installed in advance in the design of the tip of the arm. However, there are still many old-fashioned steel towers that do not have any safety equipment at all. Therefore, when necessary, drill a bolt hole in the arm itself at the tip of the arm and use the drill hole.
After measuring the specific dimensions of the steel tower, it is common to assemble factory-produced or on-site steel members by connecting them with bolts and nuts.

(Problem that the invention aims to solve) The conventional work of installing safety equipment at the tip of the steel arm was to drill a bolt hole in the arm of the steel tower itself, and then drill the bolt hole. While using the steel tower, it was necessary to assemble factory-produced or on-site steel parts by connecting them with bolts and nuts based on the specific dimensions of the steel tower, and since many of the processing operations were carried out in dangerous work sites, unspecified The problem arose was whether it would be possible to manufacture a footrail or handrail device with dimensions that could be installed on a steel tower and install so-called retrofitted safety equipment in a simple and quick manner.

(Means for Solving the Problems) In order to solve the above problems, the present invention avoids the work of drilling bolt holes in the cross arms, and uses simple assembly work that can be performed only with bolts and nuts of each component. The system is designed to provide a structure and to enable quick assembly work on site, and the gist of the structure is as follows.

Support plates 16 joined to the upper and lower surfaces of the arm main members 9, 9 at predetermined positions, respectively, forming the power transmission tower.
a, 16b, and a vertical part 13 whose one end is assembled to the support plates 16a, 16b via fixing parts 18a, 18b and whose other end protrudes downward; A pair of horizontal members 21, 21 whose portions are connected and whose other ends protrude toward the outside of the power transmission tower;
A structural member consisting of a tightening fixing part 25 attached to the inner end parts 23, 23 of the outer part of the main arm 9, and protruding diagonally downward outward from a predetermined position on the steel tower side of the arm main members 9, 9. The gist of the present invention is a work safety device for the tip of a cross arm in a power transmission tower, characterized in that the end of the supporting member is supported and fixed by the above-mentioned tightening and fixing part 25.

(Example) The power transmission tower 1 shown in FIG. 1 is of a general scale, and an inverted trapezoidal ground wire arm 3 is integrally formed on the top of the tower body 2. Tip part 4
A ground wire 5 is connected and supported by the ground wire 5. A plurality of trapezoidal power transmission line arms 6 are integrally formed in order downwardly at regular intervals, and a power transmission line 8 is coupled and supported at each tip 7.

When viewed from the front as shown in FIG. 2, the distal end portion 4 of the ground wire arm 3 has a support member 10 and a cross-joint portion 1 directed diagonally upward from below with respect to the horizontal arm main member 9.
1 is formed. When viewed from the bottom as shown in FIG. 3, the arm arm main member 9 and the support member 10 are both connected to the cross joint part 11 at a shallow angle of, for example, about 30 degrees, in the front and back directions to form a gassho arm structure. 12.

Reference numeral 13 is a work safety device for a ground wire arm according to the first embodiment of the work safety device at the tip of a arm in a power transmission tower according to the present invention, and its configuration is as follows: It provides:

<First Embodiment> The basic structure has an L-shape when viewed from the front in FIG.

The vertical portion 13a has two supporting plates 16a, 16b joined from the upper and lower surfaces of the cross arm main members 9, 9, each having both ends fixed to a pair of vertical members 17, 18a, 17,
18b, and a spacer 19 is provided below in this embodiment.
is configured by fixing 20, but the spacing retaining material 1
The technical idea is the same even if 9 is not provided.

The horizontal part 14 includes a pair of horizontal members 21, 21,
A long hole 32 is bored in the inner end portions 23, 23 near the center of the steel tower, and a fastening fixing portion 25 that is fastened to the peripheral surface of the support member 10 is connected to the fixing portion 2.
It is made up of 6 parts. The illustrated horizontal section 14 is provided with a length adjustment section 24, but it is possible to prepare several sections with appropriate lengths in advance and select and adopt them.
This length adjustment section 24 is an arbitrary component.

The length adjustment section 24 utilizes a known mechanism, and the pair of horizontal members 21, 21 are each made up of two divided bodies, each of which has through holes 27 at regular intervals. The through holes 27, 27 in both the divided bodies are formed so as to be overlapped and connected and fixed with bolts and nuts 28.

The right angle connecting portion 15 is configured by fixing 30 the lower ends of the vertical members 17, 17 in the vertical portion 13a and the outer ends 22, 22 of the horizontal members 21, 21 in the horizontal portion 14 with a joint member 29 interposed. ing.

Each of the above-mentioned fixing parts employs a bolt-type connecting mechanism, and all of them are formed to be connected with bolts and nuts with through holes drilled in advance. Of these, 18b deals with the difference in flange width of the cross arm main member 9 by making the through hole on the side of the vertical members 17, 17 into a long hole 31.

In this embodiment, the spacing member 19 is
Although it is attached to the horizontal part 14 or the right-angled connecting part 15, there is no problem and it is not an essential component in theory. In other words, this is because the vertical members 17, 17 are installed in parallel in advance by the fixing means to the cross arm main member 9.
Practically speaking, it is desirable to install it as shown in the figure in order to improve the overall strength of the installation.

Furthermore, the configuration of the gist of the present invention can also be implemented on the power transmission line arm 6 having a trapezoidal shape by reversing the vertical direction, and in this embodiment, the horizontal portion 14 is a handrail. function. Further, a separate embodiment of the work safety device of the present invention at the tip of a arm arm in a power transmission tower will be provided below as a second embodiment, which further provides a handrail function.

<Second Embodiment> Reference numeral 43 is a work safety device for a power transmission line arm according to the second embodiment of the work safety device for the end of a power transmission arm in a power transmission tower according to the present invention, and its configuration is as follows. It provides the handrail function as shown below.

A plurality of trapezoidal power transmission line arms 6 in the power transmission tower 1 have power transmission lines 8 coupled and supported at their tip ends 7, and when viewed from the front as shown in FIG. 6, the main arm members 9a are horizontal. A cross-coupled portion 11a is formed with the hanging material 10a directed diagonally downward from above. When viewed from above as shown in FIG. 7, the arm main body 9a and the hanging member 10a have a gassho arm structure in which two bodies in the front and back directions are each connected to a cross joint part 11a at a shallow angle of about 30 degrees, for example. body 12
It shows.

When viewed from the front in Figure 6, it exhibits an inverted U-shape,
The basic configuration is such that a vertical portion 43a and a horizontal portion 44 are connected by a right-angled connecting portion 45.

The vertical part 43a is a pair of vertical members 4 in which the respective ends of two support plates 46a and 46b joined from the upper and lower surfaces of the hanging member 10a are butted against the gable roof shape of the house.
7, 47 and are fixed to 48a, 48b.

The horizontal portion 44 has, at its inner end portions 50, 50 close to the center of the steel tower, a tightening fixing portion 51 that is tightened and fixed to the peripheral surface of the hanging material 10a. Incidentally, a long hole 55 is formed in advance in the fastening fixing part 51 to cope with the difference in flange width of the hanging material 10a. In the right-angled connecting portion 45, the abutting upper ends of the vertical members 47, 47 in the vertical portion 43a and the outer ends 49, 49 in the horizontal portion 44 are fixed 54 with a joint member 53 interposed.

The above-mentioned fixing parts are all formed to have through holes drilled in advance and to be connected with bolts and nuts. Of these, 48b deals with the difference in flange width of the hanging material 10a by making the through hole on the side of the vertical members 47, 47 into a long hole 31a.

The hanging material 10a in this second embodiment is similar to the supporting material 1 in the ground wire arm 3 in the first embodiment.
0, it is a structural member that supports the power transmission line arm 6, and both 10 and 10a are common supporting structural members.

(Function) In the first embodiment, first, the vertical portion 1
3a, in an upside-down U-shaped posture with the support plate 16b and the spacing member 19 released, the main arms 9, 9
After hanging from above, the support plate 16b is joined to the lower surface of the cross arm main member 9 and fixed 18b. After installing the spacer 19, the outer ends 22 of the pair of horizontal members 21 are fixed to the vertical part 13a by the right-angled connecting parts 15, and the inner ends 23 are separately supported using the elongated holes 32. The assembly is completed by connecting and fixing 26 to the tightening and fixing part 25 that is tightened and fixed to the material 10.
In addition, if the elongated hole 33 is formed in advance in the tightening fixing part 25, it is possible to cope with the difference in the flange width of the support member 10.

In the second embodiment, both ends of two support plates 46a, 46b joined from the upper and lower surfaces of the hanging member 10a are fixed to a pair of vertical members 47, 47 that are butted against the gable roof shape of a house. 48a and 48b to form the vertical part 43a, and the inner end 5 of the horizontal part 44 is attached to the tightening fixing part 51 fixed to the hanging material 10a in the direction of the center of the steel tower.
After fixing 52 0, the outer end 49 of the horizontal part 44
is fixed 54 to a right angle fixing part 45 fixed to the top of the vertical part 43a. The right angle fixing part 45 is the sixth
Although shown at an acute angle in the figure, the vertical portion 43a
There are cases where the part above the fixing part 48b is bent vertically when viewed from the front, and we have decided to refer to it as the right-angle fixing part 45 in consideration of such cases, but we purposely stick to that code name. isn't it.

Since this second embodiment has the same technical scope as the first embodiment, the utility model registration claims are described using the reference numerals shown in the first embodiment.

(Effects) The present invention has two supporting plates 16a and 16b joined from the upper and lower surfaces of arm main members 9 and 9, and
a, 18b form a vertical portion 13a assembled to the vertical members 17, 17, and a pair of horizontal members 2
1 and 21, and a horizontal portion 14 formed by connecting and fixing a tightening fixing portion 25 to the inner end portions 23, 23 of the supporting member 10 by means of a right-angled connecting portion 15. Since the device is characterized in that it is assembled and configured to have an L-shape when viewed from the front, when working on the armrest 3 exhibiting the gassho arm structure 12, the worker must attach a safety belt called a toro to the main arm of the armrest. 9 and supports 10 at appropriate locations can be provided with a simple structure, and when working on arms 3 and 6, work safety such as handrails and footrails can be provided. Since the equipment can be provided, safe work can be ensured, and the overall structure can be easily constructed by combining simple materials such as angle steel and bolts and nuts, without making holes in existing members. This is a useful device that brings about many excellent effects, such as being able to be assembled and disassembled quickly even at high places.

[Brief explanation of the drawing]

Fig. 1 is a front view of a general-sized power transmission tower, Figs. 2 to 5 show the first embodiment, Fig. 2 is an enlarged front view of the tip 4 of the cross arm 3, and Fig. 3 is the bottom view of the same. Figure, 4th
The figure is a left side view of the device of the present invention, and Figure 5 is Figure 2A-
It is an A-line sectional view. 6 to 9 show the second embodiment, FIG. 6 is an enlarged front view of the tip 7 of the arm arm 6, FIG. 7 is a plan view thereof, and FIG. 8 is a side view of the device of the present invention.
FIG. 9 is a sectional view taken along the line B--B in FIG. 6. Code list, 1...Power transmission tower, 2...Tele tower main body,
3...Ground wire arm, 4...Tip, 5...Ground wire, 6
...Power transmission line arm, 7...Tip, 8...Power transmission line,
9... Arm main material, 10... Supporting material, 10a... Hanging material, 11... Cross joint, 12... Gassho arm structure, 13... Work safety device for ground wire arm, 13
a... Vertical part, 14... Horizontal part, 15... Right angle connecting part, 16... Support plate, 17... Vertical member, 1
8, 20, 26, 30... Fixed part, 19... Spacing member, 21... Horizontal member, 22, 23... Outer, inner end, 24... Length adjustment part, 25... Tightening fixation Part, 27... Through hole, 28... Bolt nut, 29... Joint member, 31, 32, 33
...Long hole.

Claims (1)

[Scope of Claim for Utility Model Registration] Support plates 16 joined to the upper and lower surfaces of the arm main members 9, 9 at predetermined positions, respectively, forming a power transmission tower.
a, 16b, and the supporting plates 16a, 16b have fixed parts 18a,
18b, one end of which is assembled and the other end of which protrudes downward, one end of which is connected to the lower end of the vertical part 13, and the other end of which is connected to the outside of the power transmission tower. A pair of horizontal members 21, 21 protruding from the outside, and an inner end 2 of the outer part of the horizontal members 21, 21.
3, 23, and a structural member consisting of: a tightening fixing part 25 attached to the arms 9, 23; A work safety device for the tip of a arm in a power transmission tower, characterized in that it is supported and fixed by an attached fixing part 25.