JP2011091877A - Bus duct - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bus duct which achieves its elongation by adding a box of the bus duct in an optional position without using a welding method or a patch. <P>SOLUTION: A bus duct, in which boxes having U-shapes in cross sections are joined together to face each other and which accommodates a plurality of conductors in the space formed by the boxes, is equipped with: a first box piece, in which the plurality of boxes are arranged via first specified joints in the longitudinal direction of the bus duct; and a second box piece, which is joined to face the first box piece and in which the plurality of boxes are arranged via second specified joints in the longitudinal direction of the bus duct, and the first joints and the second joints are formed at a specified interval in the longitudinal direction of the bus duct. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an elongated bus duct.

In a structure such as a high-rise building, a bus duct is used to configure an electric trunk line.
Compared to a wiring system that bundles and wires multiple cables, this bus duct has extremely superior functions for preventing fires and preventing leakage magnetic flux, so it can be used as a main power supply line for factory facilities and buildings. Widely used. The bus duct is a unit having a total length of about 3 m, and the bus duct unit is connected to form an electric trunk line.

In recent years, large-scale plant facilities have been constructed, and in such large-scale plant facilities, the installation length of bus ducts also increases. For this reason, in order to reduce the construction cost and shorten the construction time, the reduction of the connection point of the bus duct is being studied, and a bus duct exceeding the standard length of 3 m is required.

Patent Document 1 discloses a long bus duct having a structure in which a rigid body having a rigid box and not having flexibility and a flexible part having no rigid box and having flexibility are alternately present in the longitudinal direction. Is described.

In addition, as a method of manufacturing a long bus duct, there is a method of adding a box of bus ducts. As a method of adding the boxes, there are a method of joining the boxes by welding, and a method of increasing the strength of the joint between the boxes using a backing plate or the like at the joint between the boxes.

A method for increasing the strength of the joint portion between boxes using a backing plate or the like will be described with reference to FIGS. The bus duct 900 is arranged so that the box piece 907 and the box piece 908 are opposed to each other, and a plurality of connecting members 909 arranged in the longitudinal direction of the bus duct at both ends in the width direction of the bus duct 900. The pieces 907 and 908 are joined. Box piece 907,
908 has a substantially U-shaped cross section, and a plurality of conductors 905 are accommodated in a space formed when the box pieces 907 and 908 are arranged to face each other. Box pieces 907, 908
The side plate 906 covers the conductor 905 and connects the bus ducts 900 to each other.
Is arranged.

The box piece 907 is formed by arranging the box 901 and the box 902 in the longitudinal direction of the bus duct 900, and the box piece 908 is arranged in the box 903 and the box 904 in the longitudinal direction of the bus duct 900. It is formed by doing. The joints 920 of the boxes 901 and 902 and the joints 921 of the boxes 903 and 904 are both formed at the center in the longitudinal direction of the bus duct 900.

The joint portions 920 of the boxes 901 and 902 and the joint portions 921 of the boxes 903 and 904 are respectively covered with a reinforcing plate 910 for reinforcement. FIG. 6 is a detailed view of the caulking plate, and the joint 92
0, and in order to increase the strength of the joint portion 921, the plate thickness is increased as in the contact plate 911 shown in FIG. 6A, or in the longitudinal direction of the bus duct as in the contact plate 912 shown in FIG. A linear convex portion is formed.

JP-A-6-62516

However, in the conventional long bus duct of Patent Document 1, there are problems that the leakage magnetic flux becomes large in the bending generation part and that the reliability cannot be ensured by bending.

Moreover, when joining by welding, since the conductor accommodated in the inside of a bus duct is not exposed, welding was needed over the perimeter of the bus duct, and it took time for manufacture.
Further, when baking and painting a bus duct that has been lengthened by welding, it has been necessary to increase the size of the painting booth and the drying furnace.

Furthermore, in the case where the strength of the joint portion between the boxes is increased by using a patch plate as shown in FIGS.
There is a problem in that the weight of the bus duct increases due to the use of the contact plate, and the construction thereof becomes complicated.

The objective of this invention is providing the bus duct which implement | achieved lengthening by adding the box of a bus duct in arbitrary positions, without using a welding method and a patch plate.

A first aspect of the bus duct according to the present invention is a bus duct in which a box having a substantially U-shaped cross-section is joined so as to face each other, and a plurality of conductors are accommodated in a space formed by the faced box. In the bus duct longitudinal direction, the plurality of boxes are joined to face the first box piece, the first box piece being arranged via a predetermined first joint, and in the bus duct longitudinal direction. A plurality of boxes having a second box piece arranged via a predetermined second joint, the first joint and the second joint being predetermined in the longitudinal direction of the bus duct. It is characterized by being formed with a distance of.

In another aspect of the bus duct of the present invention, the first joint portion and the second joint portion are substantially symmetrical with respect to a longitudinal center line perpendicular to the longitudinal direction of the bus duct at the longitudinal center portion of the bus duct. It is formed so that it becomes.

A second aspect of the bus duct of the present invention is a bus duct in which a box having a substantially U-shaped cross section is joined so as to face each other, and a plurality of conductors are accommodated in a space formed by the box made to face each other. In the bus duct longitudinal direction, the plurality of boxes are joined to face the first box piece, the first box piece being arranged via a predetermined first joint, and in the bus duct longitudinal direction. A plurality of boxes having a second box piece arranged via a predetermined second joint portion, wherein the first joint portion and the second joint portion are oblique to the longitudinal direction of the bus duct. And intersecting at a predetermined position.

According to another aspect of the bus duct of the present invention, the first joint portion and the second joint portion are substantially symmetrical with respect to a center line in the width direction perpendicular to the bus duct width direction at the center portion in the width direction of the bus duct. It is formed so that it becomes.

A third aspect of the bus duct of the present invention is a bus duct in which a box having a substantially U-shaped cross section is joined so as to face each other, and a plurality of conductors are accommodated in a space formed by the faced box. In the bus duct longitudinal direction, the plurality of boxes are joined to face the first box piece, the first box piece being arranged via a predetermined first joint, and in the bus duct longitudinal direction. A plurality of boxes having a second box piece arranged via a predetermined second joint, and the first joint and the second joint differ in the bus duct width direction. A crank shape having a length is formed, and the first joint portion and the second joint portion are substantially symmetrical with respect to a center line in the width direction perpendicular to the bus duct width direction at the center portion in the width direction of the bus duct. Is formed to be It is characterized in.

In another aspect of the bus duct of the present invention, the first box piece and the second box piece are joined by a plurality of joining members at both ends of the bus duct width direction, and the first joint end And at least one end portion in the bus duct width direction between the second joint end portion and the second joint end portion.
It is characterized in that two or more are joined.

Another aspect of the bus duct of the present invention is the outer side of the first joint and the second joint,
A decorative board having a predetermined width is arranged.

According to the present invention, a long bus duct having high strength and workability is realized by arranging the box of the bus duct so as to be symmetrical in the bus duct width direction or the bus duct longitudinal direction without using a welding method or a backing plate. can do.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view, a top view, and a sectional view taken along line AA showing a first embodiment of a bus duct according to the present invention. It is the perspective view and upper view which show another form of 1st embodiment of the bus duct which concerns on this invention. It is the perspective view and upper view which show 2nd embodiment of the bus duct which concerns on this invention. It is the perspective view and top view which show 3rd embodiment of the bus duct which concerns on this invention. It is the perspective view and upper view which show the conventional bus duct. It is a perspective view which shows the contact plate used for the conventional bus duct.

The bus duct which concerns on embodiment of this invention is demonstrated below using FIGS. 1-4. In addition, about each structural part which has the same function, the same code | symbol is attached | subjected and shown for simplification of illustration and description.

FIG. 1 shows a first embodiment of a bus duct according to the present invention. FIG. 1A is a perspective view of the bus duct 100, and FIG. 1B is a top view of the bus duct 100. Also,
FIG.1 (c) is sectional drawing of the bus duct 100 in the AA part of Fig.1 (a). The bus duct 100 is arranged so that the box piece 7 and the box piece 8 are opposed to each other. The bus duct 100 is arranged at both ends in the width direction of the bus duct 100 in the longitudinal direction of the bus duct, and includes a plurality of joints configured by screws, nuts, and the like. Using the member 9, the box pieces 7 and 8 are joined. Each of the box pieces 7 and 8 has a substantially U-shaped cross section, and a plurality of conductors 5 are accommodated in a space formed when the box pieces 7 and 8 are arranged to face each other. Further, side plates 6 for covering the plurality of conductors 5 insulated by the insulating portion 60 and for connecting the bus ducts 100 to each other are disposed at the end portions of the box pieces 7 and 8.

The box piece 7 is formed by arranging boxes 1 and 2 having different lengths in the longitudinal direction of the bus duct 100, and the box piece 8 is formed of boxes 3 and 4 having different lengths. Are arranged in the longitudinal direction of the bus duct 100. The joint portions 30 of the boxes 1 and 2 having different lengths are formed by being shifted by a distance L to the left from the longitudinal center of the bus duct 100, and the joint portions 31 of the boxes 3 and 4 having different lengths are formed. Is formed to be shifted from the center in the longitudinal direction of the bus duct 100 by a distance L to the right. That is, the joint part 30 and the joint part 31 are formed with a predetermined distance apart in the bus duct longitudinal direction.

In this way, by forming the joint portion 30 and the joint portion 31 at a predetermined distance in the bus duct longitudinal direction of the bus duct 100, both the joint portions 920 and 921 as shown in FIG. Compared with the case where it forms in a part, the deformation stress of the box pieces 7 and 8 in the joint parts 30 and 31 can be disperse | distributed, and it becomes possible to raise the intensity | strength of bus duct 100 itself.

Furthermore, it is preferable that the joint portion 30 and the joint portion 31 are formed so as to have a substantially symmetrical relationship with respect to a longitudinal center line orthogonal to the bus duct 100 in the longitudinal center portion of the bus duct 100. By forming it so as to have a substantially symmetrical relationship with respect to the longitudinal center line, the deformation stress of the box pieces 7 and 8 at the joint portions 30 and 31 can be distributed in a balanced manner, and the strength of the bus duct 100 itself can be increased. It becomes possible to raise very much.

Further, the joint 30 formed at a predetermined distance in the longitudinal direction of the bus duct, and the joint 3
The pitch in the bus duct longitudinal direction between the plurality of joining members 9 joined between 1 may be made smaller than the pitch in the bus duct longitudinal direction between the joining members 9 joined except for between the joint 30 and the joint 31. Particularly preferred. By doing in this way, it becomes possible to reinforce effectively the part where the deformation stress of box pieces 7 and 8 concentrates.

By forming the joint 30 and the joint 31 at a predetermined distance in the longitudinal direction of the bus duct as described above, the box pieces 7 and 8 in the joints 30 and 31 are deformed when the bus duct 100 is installed. As a result, the reinforcing plate can be omitted, and the bus duct 100 can be reduced in weight and can be easily constructed.

Moreover, another form of 1st embodiment is demonstrated using FIG. The difference from FIG. 1 is that a decorative plate 50 for concealing the gap is arranged at the joint 30 and the joint 31. Usually, the box has a manufacturing tolerance at the time of manufacture, and an assembly tolerance also occurs when the boxes are added. Due to these tolerances, a gap may be generated between the box 1 and the box 2 or between the box 3 and the box 4. By disposing the decorative plate 50 so as to cover the joint portions 30 and 31, the appearance can be improved.

Since the purpose of the decorative board 50 is to hide the gap, it can be made very thin,
There is no need to complicate the structure. Moreover, it is preferable to form the decorative board 50 with a metal member, and it becomes possible to implement | achieve prevention of a magnetic flux leakage by forming with a metal member.

Next, a second embodiment of the bus duct according to the present invention will be described with reference to FIG. FIG.
) Is a perspective view of the bus duct 300, and FIG. 3B is a top view of the bus duct 300. The difference from the first embodiment of FIG. 1 is that the joint portions 32 and 33 are formed obliquely in the bus duct width direction.

One end of the box 11 is formed obliquely in the bus duct width direction, and one end of the box 12 is the box 1
1 is formed obliquely in the bus duct width direction so as to correspond to the portion. The box piece 17 is formed together with the joint portion 32 by arranging the oblique portions formed in the boxes 11 and 12 so as to face each other. Similarly, box 13 and box 14
Also, one end is formed obliquely in the width direction of the bus duct, and the diagonal pieces formed in the boxes 13 and 14 are arranged so as to face each other, so that the box piece 18 together with the joint 33 is provided.
Is formed. Then, the box pieces 17 and 18 are joined using the joining member 9 so that the joint portion 32 formed by the boxes 11 and 12 and the joint portion 33 formed by the box 13 and the box 14 intersect each other. ing.

Furthermore, it is preferable that the joint portion 32 and the joint portion 33 are formed so as to have a substantially symmetrical relationship with respect to the width direction center line parallel to the bus duct 300 at the center portion in the width direction of the bus duct. By forming it so as to have a substantially symmetrical relationship with respect to the center line in the width direction,
3 can be distributed in a balanced manner, and the strength of the bus duct 300 itself can be greatly increased.

Further, in the bus duct 300 in which the box pieces 17 and 18 are joined so that the joint portion 32 formed obliquely by the boxes 11 and 12 and the joint portion 33 formed diagonally by the box 13 and the box 14 intersect each other. The pitch in the longitudinal direction of the bus duct between the joint members 9 joined between the joint portion 32 and the joint portion 33 is the length of the bus duct between the joint members 9 joined other than between the joint portion 32 and the joint portion 33. It is particularly preferable to make the pitch smaller than the direction pitch. By doing in this way, it becomes possible to reinforce effectively the part where the deformation stress of box pieces 17 and 18 concentrates.

As described above, the joint portion 32 and the joint portion 33 are formed obliquely in the bus duct width direction and intersected at a predetermined position, so that the box pieces 17 and 18 at the joint portions 32 and 33 when the bus duct 300 is installed. The portion is not deformed, and the reinforcing plate can be omitted, so that the bus duct 300 can be reduced in weight and can be easily constructed.

Next, a third embodiment of the bus duct according to the present invention will be described with reference to FIG. FIG.
) Is a perspective view of the bus duct 400, and FIG. 4B is a top view of the bus duct 400. The difference from the first embodiment is that the joint portions 34 and 35 are formed in a crank shape having different width lengths a and b in the bus duct width direction.

One end of the box 21 is formed in a crank shape having different width lengths a and b in the bus duct width direction, and one end of the box 22 is formed in the crank shape of the box 21 and corresponds to the portion. Are formed in a crank shape having different width lengths a and b.
A box-shaped piece 27 is formed together with the joint 34 by arranging the crank-shaped portions formed in the boxes 21 and 22 so as to face each other. Similarly, box 23 and box 2
4 is also formed in a crank shape with one end having different width lengths a and b in the width direction of the bus duct, and the crank-shaped portions formed in the boxes 23 and 24 are arranged so as to face each other together with the joint portion 35. A box piece 28 is formed. Boxes 21 and 2
2 and the joint 35 formed by the box 23 and the box 24 are substantially symmetrical with respect to the width direction center line parallel to the bus duct 400 at the center in the width direction of the bus duct. The box pieces 27 and 28 are joined as described above.

Further, a joint 34 formed in a crank shape by the boxes 21 and 22, a box 23 and a box 24.
In the bus duct in which the box pieces 27 and 28 are joined so that the joint portion 35 formed in the crank shape is substantially symmetrical with respect to the center line in the width direction orthogonal to the center portion in the width direction of the bus duct. The pitch in the longitudinal direction of the bus duct between the plurality of joining members 9 joined between the joint portion 34 and the joint portion 35 is the plurality of joining members 9 joined other than between the joint portion 34 and the joint portion 35.
It is particularly preferable that the pitch is smaller than the pitch in the longitudinal direction of the bus duct. By doing in this way, it becomes possible to reinforce effectively the part where the deformation stress of box cases 27 and 28 concentrates.

As described above, the joint portion 34 and the joint portion 35 are formed in a crank shape in the width direction of the bus duct so as to be substantially symmetrical with respect to the width direction center line parallel to the bus duct 400 at the center portion in the width direction of the bus duct. Thus, when installing the bus duct 400, the joint portions 34, 3
5 can be prevented from being deformed, the reinforcing plate can be omitted, and the bus duct 400 can be reduced in weight and can be easily constructed.

As described above, the bus duct is generally unitized at 3 m, but when the bus duct is lengthened, it is optimal to unitize at 6 m or 9 m by adding boxes. Become. In this case, the first embodiment to the third embodiment can be appropriately combined.

100, 300, 400, 900 Bus duct 1, 2, 3, 4, 11, 12, 13, 14, 21, 22, 23, 24 Box 5 Conductor 6 Side plate 8, 17, 18, 27, 28 Box piece 9 Joining member 30, 31, 32, 33, 34, 35 Joint portion 50 Decorative plate 60 Insulating portion 901, 902, 903, 904 Box 905 Conductor 906 Side plate 907, 908 Box piece 909 Bonding member 910, 911

Claims (7)

In a bus duct in which a box having a substantially U-shaped cross section is joined so as to face each other, and a plurality of conductors are accommodated in a space formed by the faced box,
In the bus duct longitudinal direction, a first box piece in which a plurality of the boxes are arranged via a predetermined first joint portion;
A second box piece that is joined so as to face the first box piece, and in the bus duct longitudinal direction, the plurality of boxes are arranged via predetermined second joints, and
The bus duct, wherein the first joint portion and the second joint portion are formed at a predetermined distance in the bus duct longitudinal direction. The first joint portion and the second joint portion are formed so as to have a substantially symmetrical relationship with respect to a longitudinal center line orthogonal to the longitudinal direction of the bus duct in the longitudinal center portion of the bus duct. The bus duct according to claim 1, wherein In a bus duct in which a box having a substantially U-shaped cross section is joined so as to face each other, and a plurality of conductors are accommodated in a space formed by the faced box,
In the bus duct longitudinal direction, a first box piece in which a plurality of the boxes are arranged via a predetermined first joint portion;
A second box piece that is joined so as to face the first box piece, and in the bus duct longitudinal direction, the plurality of boxes are arranged via predetermined second joints, and
The said 1st joint part and said 2nd joint part are diagonally formed in the bus duct longitudinal direction, respectively, and cross | intersect in the predetermined position, The bus duct characterized by the above-mentioned. The first joint portion and the second joint portion are formed so as to have a substantially symmetrical relationship with respect to a center line in the width direction perpendicular to the bus duct width direction at a center portion in the width direction of the bus duct. The bus duct according to claim 3, wherein In a bus duct in which a box having a substantially U-shaped cross section is joined so as to face each other, and a plurality of conductors are accommodated in a space formed by the faced box,
In the bus duct longitudinal direction, a first box piece in which a plurality of the boxes are arranged via a predetermined first joint portion;
A second box piece that is joined so as to face the first box piece, and in the bus duct longitudinal direction, the plurality of boxes are arranged via predetermined second joints, and
The first joint portion and the second joint portion are formed in a crank shape having different lengths in the bus duct width direction, and the first joint portion and the second joint portion are the center in the width direction of the bus duct. The bus duct is formed so as to have a substantially symmetrical relationship with respect to the center line in the width direction orthogonal to the width direction of the bus duct. The first box piece and the second box piece are joined by a plurality of joining members at both ends of the bus duct width direction,
The three or more joining members are joined to at least one end portion in the bus duct width direction between the first joint end and the second joint end. The bus duct according to any one of the above. The bus duct according to any one of claims 1 to 6, wherein a decorative plate having a predetermined width is disposed outside the first joint portion and the second joint portion.

Images