JP2004080978A - Bus duct - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bus duct which can be installed easily and stably. <P>SOLUTION: The bus duct includes a conductor 140, aligned in parallel with a plurality of conductor plates 141 having insulating coatings 142, a conductor container 115 for containing the conductors, and an engaging protrusion 117 provided on an outside surface of the container 115. The protrusion 117 can be engaged with a clamping fitting 200 or hanging fittings, by providing the protrusion 117 on the outside surface of the container. Thus, the duct can be installed in the state in which the duct is easily and surely clamped. In particular, the fitting 200 or the fittings can be mounted, by utilizing the protrusion 117 provided in the container 115 having a large weight; and even when the dust is placed in the vertical direction, its lateral deflection can be suppressed effectively . <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a bus duct. In particular, the present invention relates to a bus duct housing that joins and couples a pair of housing pieces and accommodates an electric conductor therein.
[0002]
[Prior art]
Generally, a bus duct has a configuration in which a conductor is housed and held inside a housing. Compared with a wiring system that bundles and wires multiple cables, this bus duct has extremely excellent functions for preventing fires and preventing leakage magnetic flux, so it is used for main power supply lines of factory facilities and buildings. Widely used.
[0003]
As a conventional bus duct, for example, there is a configuration shown in FIG. FIG. 11 is a longitudinal sectional view showing a state in which the bus duct is installed vertically. This bus duct is composed of a unit in which a conductor is housed in a housing. The housing 110 is a combination of a pair of divided pieces having the same shape, and accommodates the conductor 140 in a space formed between the two divided pieces. The housing 110 includes a conductor housing 115 formed in a gutter shape having a rectangular cross section, a joint 120 extending in a direction away from both opening side edges of the conductor housing, and a reinforcing portion 130 substantially orthogonal to the joint 120. And The split pieces are joined to each other by passing a rivet 123 or a bolt through the joint 120. On the other hand, the conductor 140 is configured by, for example, juxtaposing three-phase conductor plates 141 having an insulating coating 142.
[0004]
Such a bus duct is installed vertically on the floor surface, or suspended from a ceiling via a hanging bracket. At this time, a fixing bracket 600 shown in FIG. 11 is used for fixing to a floor surface or a mounting bracket. The fixing bracket 600 includes an engagement recess having a concave cross section and a flat portion continuous with the engagement recess. The bus duct is fixed by engaging the engagement concave portion of the fixing bracket 600 with the substantially L-shaped reinforcing portion 130 and fastening a flat portion along the installation surface with a bolt 610 or the like.
[0005]
[Problems to be solved by the invention]
However, the conventional bus duct has the following problems.
{Circle around (1)} It is difficult to effectively suppress the sideways movement of the bus duct.
This is because the bus duct is fixed by pressing the reinforcing portion located at the lowermost position with a fixing metal, so that the upper side of the bus duct is slightly shifted. As a result, a large mechanical load is applied to the joint below the conductor housing when the vehicle sways.
[0006]
(2) It is difficult to accurately position the side plate with respect to the conductor housing.
The bus duct unit is connected to another bus duct unit via the connection part. A side plate is used for connection between the unit and the connection portion. For example, the side plate is fixed to an outer surface of the conductor housing portion. At this time, accurate positioning of the side plate with respect to the conductor housing is necessary, but since the outer surface of the conductor housing is a flat surface, there is no guide and there is poor workability in positioning.
[0007]
Therefore, a main object of the present invention is to provide a bus duct that can be easily and stably installed.
[0008]
Another object of the present invention is to provide a bus duct in which a side plate for connecting a bus duct unit to a connection portion can be easily mounted on the bus duct unit.
[0009]
[Means for Solving the Problems]
The bus duct of the present invention is characterized by having a conductor in which a plurality of conductor plates having an insulating coating are arranged in parallel, a conductor accommodating portion accommodating the conductor, and an engaging projection provided on an outer surface of the conductor accommodating portion. I do.
[0010]
By providing the engagement protrusion on the outer side surface, the engagement protrusion can be engaged with the fixing bracket or the suspension bracket. Therefore, it is possible to easily and surely install the bus duct in a fixed state. In particular, it is possible to mount a fixing bracket or a suspension bracket by using an engagement projection provided on a heavy conductor storage portion, and it is possible to effectively suppress horizontal displacement even when the bus duct is placed vertically. In addition, by using the engagement protrusion as a guide for the side plate, the positioning of the side plate can be easily performed.
[0011]
The cross-sectional shape of the engagement projection is not particularly limited as long as it is a cross-sectional shape capable of engaging with the fixing bracket or the hanging bracket. For example, a hook-shaped engaging projection is preferable. In the case where the side plate is used as a guide, an engagement protrusion having a ridge extending along the longitudinal direction is preferable.
[0012]
The form of the engagement protrusion may be provided continuously in the longitudinal direction of the bus duct, or may be provided intermittently. By providing the engagement projections continuously in the longitudinal direction of the bus duct, the engagement projections can also have a function as a reinforcing material for suppressing the bus duct from bending in the longitudinal direction.
[0013]
The number of engagement projections is at least one. It is desirable to use a pair of engaging projections in order to be configured to be able to engage with both the fixing bracket and the hanging bracket. In the case of using the side plate as a guide, one may be provided, but it is preferable to provide a pair of the side plates so that the side plate can be fitted between both the engagement protrusions.
[0014]
The installation location of the engagement projection is on the outer surface of the conductor housing. In particular, it is preferable to provide a pair of engagement projections on the side edge of the outer surface of the conductor housing portion so as to face each other. With such an arrangement of the engagement projections, the side plate can be easily fitted between the two engagement projections from the end of the unit. In addition, when the bus duct is placed horizontally, the engagement protrusions come into contact with the installation surface with a wide interval, and the bus duct can be stably supported. In order to use the engagement projection as a guide for attaching the side plate, the engagement projection may be provided on the outer side surface of the conductor housing at the end of the bus duct unit.
[0015]
The engagement projections may be formed integrally with the housing by extrusion, or the engagement projections formed separately from the housing may be fixed by appropriate means such as bolts, rivets, and welding. When the engagement protrusion is formed by extrusion, the engagement protrusion continuous in the longitudinal direction can be easily formed.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described.
(Example 1: Vertical installation on floor)
1A and 1B show a unit of the bus duct of the present invention, wherein FIG. 1A is a front view, FIG. 1B is a plan view, and FIG. 2 is a cross-sectional view of the bus duct of the present invention installed vertically on a floor surface.
[0017]
This unit 100 has a configuration in which a conductor 140 is housed in a bus duct housing 110 as shown in FIG. The unit 100 has a connection portion 150 attached to an end thereof, and can be connected to another unit to form a line.
[0018]
As shown in FIG. 2, the housing 110 combines a pair of divided pieces 110A and 110B having the same shape and accommodates the conductor 140 in a space formed between the two divided pieces. The housing 110 includes a conductor housing 115 formed in a trough shape having a rectangular cross section, a joint 120 extending in a direction away from both opening side edges of the conductor housing 115, and a reinforcing portion 130 substantially orthogonal to the joint. And
[0019]
Here, an engagement protrusion 117 having an L-shaped cross section is formed on the outer side surface 116 of the conductor housing portion 115. The engagement protrusion 117 is formed integrally with the housing by extruding aluminum, and is formed over the entire length of the housing in the longitudinal direction. In this example, a pair of engaging projections 117 are provided on both side edges of the conductor housing portion 115 in one divided piece so as to face each other. As will be described later, the engagement projection 117 is made of a material, shape, and size that has sufficient strength to engage with a fixing bracket or a hanging bracket.
[0020]
A groove 121 is formed along the longitudinal direction of the housing at the boundary between the opening side edge of the conductor housing 115 and the joint 120, and the O-ring 122 is fitted into this groove to form a joint boundary between the divided pieces. It prevents foreign substances such as water from entering from the surface.
[0021]
The divided pieces are joined to each other by penetrating a rivet, a bolt, or the like into the joining portion 120. In this case, the two divided pieces are joined by crimping the flanges with the rivets 123 without forming a hole in the joint in advance.
[0022]
Further, a reinforcing portion 130 having a substantially L-shaped cross section is connected to the joining portion 120. The reinforcing portion 130 includes a first horizontal reinforcing portion 131 connected to the joining portion 120, a vertical reinforcing portion 132 extending substantially perpendicularly to the conductor housing portion side with respect to the first horizontal reinforcing portion 131, and a joining portion side from the vertical reinforcing portion 132. And a second horizontal reinforcing portion 133 extending substantially at a right angle.
[0023]
On the other hand, the conductor 140 has a configuration in which three conductor plates 141 having an insulating coating 142 are arranged in parallel. Except for both ends of the conductor 140, the respective conductor plates are arranged adjacent to each other, but only the end portions are configured such that the two conductor plates 141 on both sides are bent to provide an interval between the respective conductor plates 141. ing. In addition, the conductor coating has been removed from the conductor terminals to expose the conductor plate 141.
[0024]
Next, a usage mode of the bus duct will be described. As shown in FIG. 2, the bus duct is placed so that the first horizontal reinforcing portion 131 is in contact with the installation surface, and the fixing metal 200 is hung on the engagement protrusion 117 located on the lower side, and the fixing metal 200 is attached. It is fixed by fixing it to the floor surface with bolts 220. A substantially L-shaped metal piece was used for the fixture 200. The fixing bracket 200 is formed in a key shape in which one end is engaged with the engagement protrusion, and the bus duct can be fixed to the floor surface by hanging the key shape portion 210 on the engagement protrusion 117. The fixtures 200 may be discretely arranged at appropriate intervals in the longitudinal direction of the bus duct.
[0025]
Here, if the upper end of the bus duct attempts to swing to the right, the left fixing bracket 200 pulls the bus duct to the left via the engagement protrusion 117, and at the same time, the right fixing bracket 200 presses the housing 110, so that the bus duct is moved. Can be firmly supported from both sides. Therefore, the lateral displacement of the bus duct can be effectively suppressed.
[0026]
In FIG. 2, the fixing bracket 200 that engages only with the engagement protrusion 117 is shown. However, as shown in FIG. 3, a fixing bracket 230 that further presses the first horizontal reinforcing portion 131 may be used. The fixing bracket 230 has a U-shaped part that pushes the first horizontal reinforcing part 131 from above by going over the vertical reinforcing part 132 and the second horizontal reinforcing part 133, and penetrates through a bolt 220 common to the fixing metal 200. And fixed to the installation surface. By using the fixture 230 of FIG. 3 together, the bus duct can be more firmly fixed.
[0027]
Further, in FIG. 3, the engagement with the engagement protrusion 117 and the pressing of the first horizontal reinforcing portion 131 were performed using the two fixing fittings 200 and 230. However, as shown in FIG. It is also possible to use a fixing fitting 240 in which fittings are integrated.
[0028]
(Example 2: hanging from the ceiling)
Next, an installation state in which the bus duct illustrated in FIG. 1 is suspended from the ceiling will be described with reference to FIG. In this installation example, the bus duct is vertically arranged, the hanging fitting 300 is hung on the engaging projection 117 located on the upper side, and the bus duct is hung from the ceiling. The hanging bracket 300 has a substantially L-shape in which a long piece and a short piece are connected at a right angle, and a key-shaped part 310 to be engaged with the engaging projection 117 is formed at an end of the long piece. On the other hand, a bolt hole is formed in the short piece, and the hanging bracket is fixed to the ceiling by inserting a bolt 320 into the bolt hole and screwing it into the ceiling. Here, the hanging metal fittings 300 are engaged with the respective engaging projections 117 on the right and left sides of the bus duct, and are attached to the target so that the short pieces face in directions away from each other. The hanging brackets 300 may also be discretely arranged at appropriate intervals in the longitudinal direction of the bus duct.
[0029]
As described above, even when the bus duct is suspended from the ceiling, the engagement protrusion 117 can be effectively used, the installation work can be easily performed, and the reliable suspension support can be realized.
[0030]
In the configuration of FIG. 5, a state where the hanging pieces 300 are attached in the direction in which the short pieces are separated from each other is shown. However, as shown in FIG. 6, the hanging pieces 330 are attached so that the short pieces overlap each other, May be penetrated by bolts 320 and fixed to the ceiling. In the structure of FIG. 5, two bolts are required, but in this example, attachment can be made with one bolt 320. Further, in the configuration of FIG. 6, the bolt 320 may be a long bolt, and a suspension structure in which the short piece of the suspension fitting 330 and the ceiling are opened.
[0031]
In addition, the engagement protrusion 117 of the bus duct of the present invention can be used for mounting a branch box. In a bus duct, a branch box may be provided at an upper part of the bus duct in order to branch off current. In that case, as shown in FIG. 7, the branch box is placed on the first horizontal reinforcing portion above the bus duct. FIG. 7 shows only the bottom surface 400 of the branch box. Then, the branch box and the bus duct are connected to the bottom surface 400 of the branch box using the same bracket as the hanging bracket 300 shown in FIG.
[0032]
(Example 3: Horizontal installation)
Next, an installation structure when the bus duct is placed horizontally will be described with reference to FIG. FIG. 8 is a configuration diagram showing a state in which the bus duct of the present invention is placed horizontally via a mounting bracket from the ceiling.
[0033]
Here, a substantially L-shaped mounting bracket 450 in which the short pieces are connected to the long pieces at right angles is used to support the bus duct in a horizontal state. The long piece on which the bus duct is placed is longer than the length from one first horizontal reinforcing portion 131 to the other first horizontal reinforcing portion 131 in the bus duct, and a bolt hole is formed almost in the middle. When the bus duct is placed on the long piece, the engaging projection 117 of the housing comes into contact with the mounting bracket 450, and supports the bus duct.
[0034]
A fastening piece 460 is used for fixing the bus duct and the mounting bracket 450. The fastening piece 460 is an elongated metal plate whose both ends are slightly bent and folded up, and a bolt through hole is formed in the center. A bolt is previously passed through the fastening piece 460, and the fastening piece 460 is fitted between both engagement projections located below when the fastener is placed horizontally. The bus duct in that state is placed on the mounting bracket, the bolt 470 is also passed through the bolt hole of the mounting bracket 450, and the nut 480 is screwed into the tip of the bolt 470. When the nut 480 is screwed in, both ends of the fastening piece engage with the engaging projections 117 and press the projections downward, so that the engaging projections 117 are pressed toward the long side, and the bus duct is fixed to the mounting bracket 450. be able to.
[0035]
(Example 4: Guide for side plate)
Further, the engagement protrusion can be used as a guide for a side plate for connecting the bus duct unit to the connection portion. As shown in FIG. 1, the bus duct unit is further connected to another end of the bus duct unit by connecting a connecting portion 150 to an end thereof. At this time, a side plate 500 having a substantially Z-shaped cross section is attached to an end of each bus duct unit.
[0036]
The mounting state of this side plate will be described with reference to FIGS. FIG. 9 is a perspective view showing a state before the side plate is fitted into the engagement projection of the bus duct of the present invention, and FIG. 10 is a perspective view showing a state where the side plate is fitted into the engagement projection.
[0037]
The side plate 500 has a mounting piece 510 fixed to the outer surface of the conductor housing 115, an intermediate piece 520 bent substantially at right angles to the mounting piece 510, and a substantially right angle bent to the intermediate piece 520. That is, it is composed of the mounting piece 510 and the connecting piece 530 that is configured substantially in parallel. The mounting piece 510 is formed to have a width suitable for the interval between the pair of engaging projections 117 facing each other. The intermediate piece 520 and the connecting piece 530 have a width substantially corresponding to the length in the vertical direction of the bus duct (the length from one first horizontal reinforcing portion 131 to the other first horizontal reinforcing portion 131). The connection piece 530 is formed with a bolt hole 531 for connecting to the connection portion with a bolt.
[0038]
Since a groove is formed between the engaging protrusion 117 and the outer surface of the conductor housing portion, the engaging protrusion 117 is used as a guide for the side plate 500 by inserting the mounting piece 510 into the groove. (See FIG. 10).
[0039]
The mounting piece 510 is fixed to the housing by being rivet-pierced together with the conductor housing 115 and caulking. Of course, a through-hole may be formed in advance in the mounting piece 510 and the conductor accommodating portion 115, and the rivet may be passed through the through-hole and swaged.
[0040]
【The invention's effect】
As described above, according to the bus duct of the present invention, the following effects can be obtained.
[0041]
{Circle around (1)} By providing the engaging projection on the outer surface of the conductor housing, the fixing bracket can be engaged with the engaging projection, and the bus duct can be easily and securely fixed on the floor surface or on the mounting bracket. Can be.
[0042]
{Circle around (2)} The bus duct can be suspended easily and stably by engaging the hanging fitting with the engaging projection.
[0043]
{Circle around (3)} The engagement protrusion can be used as a guide for the side plate connected to the connection portion, and the side plate can be easily positioned at a predetermined position on the outer surface of the conductor housing portion.
[Brief description of the drawings]
FIG. 1 shows a unit of the bus duct of the present invention, wherein (A) is a front view and (B) is a plan view.
FIG. 2 is a sectional view showing a state in which the bus duct of the present invention is installed vertically on a floor surface.
FIG. 3 is a cross-sectional view of the bus duct of the present invention in a vertically placed state in which a fixing metal for pressing a first horizontal reinforcing portion is also used.
FIG. 4 is a cross-sectional view of the bus duct of the present invention in a vertically placed state using a fixing fitting that simultaneously engages with an engaging projection and presses a first horizontal reinforcing portion.
FIG. 5 is a sectional view showing a state in which the bus duct of the present invention is suspended from a ceiling.
FIG. 6 is a cross-sectional view of a state where the bus duct of the present invention is suspended from a ceiling by a suspension fitting different from that of FIG. 5;
FIG. 7 is a sectional view showing a state in which a branch box is mounted on the bus duct of the present invention.
FIG. 8 is a sectional view showing a state where the bus duct of the present invention is placed horizontally.
FIG. 9 is a perspective view showing a state before a side plate is fitted to an end of the bus duct of the present invention.
FIG. 10 is a perspective view showing a state after a side plate is fitted to an end of the bus duct of the present invention.
FIG. 11 is a cross-sectional view showing a vertical state of a conventional bus duct.
[Explanation of symbols]
REFERENCE SIGNS LIST 100 Unit 110 Bus duct housing 110A, 110B Divided piece 115 Conductor storage portion 116 Outer side surface 117 Engagement projection 120 Joint 121 Groove 122 O-ring 123 Rivet 130 Reinforcement 131 First horizontal reinforcement 132 Vertical reinforcement 133 Second horizontal reinforcement 140 Conductor 141 Conductor plate 142 Insulation coating 150 Connection part 200 Fixing part 210 Key part 220 Bolt 230 Fixing part 240 Fixing part 300 Hanging part 310 Key part 320 Bolt 330 Hanging part 400 Bottom 450 Installation part 460 Tightening piece 470 Bolt 480 Nut 500 Side plate 510 Mounting piece 520 Intermediate piece 530 Connection piece 531 Bolt hole 600 Fixing bracket 610 Bolt

Claims (5)

A conductor in which a plurality of conductor plates having an insulating coating are arranged in parallel,
A conductor storage section for storing the conductor,
A bus duct, comprising: an engagement protrusion provided on an outer surface of the conductor housing. 2. The bus duct according to claim 1, wherein the engagement protrusion is configured to engage with a fixture for mounting the bus duct on an installation surface. 3. 2. The bus duct according to claim 1, wherein the engagement protrusion is configured to engage with a suspender for suspending the bus duct. 3. The bus duct according to claim 1, wherein the engagement protrusion is a guide of a side plate connected to a connection portion. 2. The bus duct according to claim 1, wherein the engagement protrusion is provided continuously in a longitudinal direction of the bus duct. 3.

Images