JPH023366B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a method for vertically laying long bus ducts used as power distribution lines in buildings, factories, etc.

(Prior art) When a conventional bus duct is used as the main line of a building, as shown in Figure 1, a bus duct 1 of a standard length of about 3 m, close to the floor height, is attached to a horizontal support 2 on each floor with a spring. The bus ducts 1 are vertically supported via hangers 4, and the upper and lower bus ducts 1 are successively connected at joints 5. At this time, expansions 6 were connected in series at appropriate intervals in order to absorb the amount of thermal expansion and contraction of each bus duct 1. Note that 7 is a plug-in type branch section for branch connection.

Conventionally, cable installation was carried out using a standard length bus duct 1 of approximately 3 m, so the installation location was moved sequentially from the 1st floor, 2nd floor, 3rd floor, etc., so it was necessary to introduce mechanical power for the cable installation. The drawback was that it was difficult to shorten the construction period. In addition, in the conventional construction method, it is necessary to form joint portions 5 at intervals of about 3 m, which makes construction very laborious and time-consuming, and this also has the drawback that it is difficult to shorten the construction period. Furthermore, since the formation of the joint portion 5 is done on-site, there is a drawback that reliability tends to be low. In addition, the vertical installation method has the disadvantage that it is difficult to fix the cable to a horizontal support because the cable's own weight always acts downwards, causing a force that tends to cause the cable to fall.

(Object of the Invention) An object of the present invention is to provide a method for vertically laying a long bus duct in a tall building, which can be efficiently and quickly installed.

(Structure of the Invention) The vertical installation method of a long bus duct according to the present invention uses a long bus duct in which rigid parts and flexible parts are alternately provided in the longitudinal direction of a plurality of long insulated conductors arranged in parallel, The long bus duct is vertically erected through the through hole of the horizontal support on each floor, and when the long bus duct is erected in a state where each of the rigid body parts is located on each floor, each of the rigid body parts is fixed. Fixing devices are attached to predetermined positions of each of the rigid body parts while the bus duct is pulled up to a higher position than the desired height, and then the long bus duct is pulled back downward and the fixing devices are temporarily placed on the horizontal supports on each floor. The present invention is characterized in that each of the fixtures is fixed to the horizontal support in a locked state.

(Example) Examples of the present invention will be described in detail below with reference to the drawings. In the present invention, a long bus duct 9 as shown in FIGS. 2 to 4 is used. This long bus duct 9 consists of a long insulator 10 formed by covering a flexible long rectangular conductor 10A with an insulation coating 10B.
The length of the long insulated conductors 10 is longer than that of a conventional regular length bus duct, and three phases are stacked in parallel. Rigid boxes 11 are integrally formed on the outer periphery of the aggregate of these long insulated conductors 10 at intervals in the longitudinal direction. A rigid body part 12 having these rigid body boxes 11 and having no flexibility
and a flexible portion 13 that does not have a rigid box 11 and has flexibility.
The structure is such that these are alternately present in the longitudinal direction. The rigid box 11 of each rigid body part 12 is provided with a plug-in type branch part 14 for branch connection. Also, a junction box 1 is provided at one end of this bus duct 9.
5 is provided.

Such a long bus duct 9 has a total length, for example.
Manufactured to a length of approximately 50m. If this length is used as a main line in a general building, one strip length will be sufficient. When transporting such a long bus duct 9, the second
As shown in the figure, by folding it into an S-shape, it becomes a small package and can be easily transported.

Next, an example of a method for vertically installing a long bus duct of the present invention using such a long bus duct 9 will be explained in detail with reference to FIGS. 5 to 10.

(A) The long bus duct 9 with the flexible portion 13 bent and folded into an S-shape is transported to the installation site.

(B) From the top floor of the building, the hoisting rope is lowered to the floor where the long bus duct 9 is brought in through the through hole 3 of the horizontal support 2 on each floor.

(C) Mechanically fix the top end of the long bus duct 9 to the bottom end of the hoisting rope.

(D) Wind up the hoisting rope using a winch or crane, and lift the long bus duct 9 sequentially from the lower floor to the upper floor through the through hole 3 of the horizontal support 2 on each floor.

(E) The long bus duct 9 is arranged so that each rigid body part 12 is located on each floor, and the attachment part of each rigid body part 12 to the horizontal support body 2 is located above the horizontal support body 2, as shown in FIG. The long bus duct 9 is hoisted so as to be suspended.

(F) In this state, the horizontal support 2 of the rigid body part 12 on each floor
At the position to be fixed to the
Bolt 17 in a direction perpendicular to rigid box 11
and fix with nut 18. This fixture 16 has a length that protrudes from both sides of the rigid body 11, and is larger than the size of the through hole 3 of the horizontal support 2, so that it straddles the through hole 3 and rests on the horizontal support 2. The dimensions should be determined in advance. Fixture 1
6 is provided with a fixing hole 19 for the horizontal support 2 in advance.

(G) Once the fixing devices 16 have been attached to the rigid body parts 12 on all floors, the hoisting ropes are loosened and the long bus duct 9 is pulled back downward using its own weight. Then, as shown in FIG. 6, the fixture 16 of the lowest rigid body part 12 hits the horizontal support body 2 of that floor, and the rigid body part 12 is temporarily locked to the horizontal support body 2, thereby preventing it from falling.

(H) In this state, the fixture 16 placed on the horizontal support 2 is fixed to the horizontal support 2 with bolts 20 and nuts 21 as shown in FIG. This work is easy because it can be performed with the rigid body part 12 temporarily locked.

(I) Further loosen the hoisting rope, pull back the long bus duct 9 downward using its own weight, and as shown in FIG. It is placed on the body 2 and temporarily locked, and in this state, the fixture 16 is similarly fixed to the horizontal support 2 as described above. At this time, since the length of the long bus duct 9 between adjacent fixtures 16 is predetermined to be longer than the floor height, when the adjacent fixtures 16 are fixed to the horizontal supports 2 of the corresponding floors, As shown in FIG. 7, the movable portion 13 becomes a portion that acts as an expansion during thermal expansion and contraction.

(J) Perform these operations one after another to fix each rigid body part 12 of the long bus duct 9 to the horizontal support body 2 on each floor as shown in FIG.

(K) Appropriate protective parts will be attached to the flexible parts 13 on each floor, and the through holes 3 in the horizontal supports 2 will be closed as disaster prevention measures.

In the above embodiment, each fixture 16 is lowered one by one onto the corresponding horizontal support 2 and fixed, and then the fixture 16 above it is lowered onto the corresponding horizontal support 2 and fixed. However, the fixing work may be performed after all of the fixing tools 16 are lowered onto the corresponding horizontal supports 2.

(Effects of the Invention) As explained above, in the present invention, since a long bus duct having rigid parts and flexible parts alternately in the longitudinal direction is used, the long bus duct can be lifted from an upper floor with a winch etc. It is possible to start up the system quickly, introduce mechanical power into the installation, and efficiently carry out the start-up work for each floor, thereby shortening the construction period. Further, according to the present invention, since the bus duct is long, the number of joint parts is significantly reduced.
The amount of on-site work will be reduced accordingly, and the construction period can also be shortened. Furthermore, in the present invention, each rigid body part of the long bus duct is raised above the position where it should be fixed, and the fixtures are attached to each rigid body part in that state, so that it can be fixed at the optimal height position for work. Able to install tools. In addition, in the present invention, after the fixing device is attached to the rigid body part, the fixing device is lowered onto the horizontal support of the floor and temporarily locked, and the work of fixing the fixture to the horizontal support is performed. There is no risk of it falling under its own weight,
It is possible to safely perform the work of fixing the fixture to the horizontal support.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing a conventional bus duct in a laid state, Fig. 2 is a front view of an example of a long bus duct used in the present invention in a folded state, and Fig. 3 is a cross-sectional view taken along the line X--X in Fig. 2. , FIG. 4 is an end view taken along the Y-Y line in FIG. FIG. 10 is a perspective view showing an example of a state in which a fixture is attached to a rigid body part of a bus duct; FIG. 10 is a partially cutaway perspective view showing an example of a state in which a rigid part of a long bus duct is fixed to a horizontal support body with a fixture . 2... Horizontal support body, 3... Through hole, 9... Long bus duct, 10... Long insulated conductor, 11... Rigid box, 12
...Rigid part, 13...Flexible part, 16... Fixture.

Claims (1)

[Claims] 1 Using a long bus duct in which rigid parts and flexible parts are alternately provided in the longitudinal direction of a plurality of long insulated conductors arranged in parallel, the long bus duct is vertically installed through a through hole in a horizontal support on each floor. When the long bus duct is erected in a state where each of the rigid body parts is located on each floor, each of the rigid body parts is raised to a position higher than the height at which each of the rigid body parts should be fixed. Fixing devices are attached to the respective positions, and then the long bus duct is pulled back downwards, and each of the fixing devices is placed on the horizontal support on each floor and temporarily locked, and each of the fixing devices is fixed to the horizontal support. A vertical installation method for long bus ducts.