JP3707029B2 - Bus duct - Google Patents

Description

  The present invention relates to a bus duct. In particular, the present invention relates to a bus duct housing that joins and joins a pair of divided pieces and houses an electrical conductor therein.

  In general, a bus duct has a configuration in which a conductor is housed and held in a housing. 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.

  As a conventional bus duct, for example, there is a configuration shown in FIG. 9 (see Patent Document 1). FIG. 9 is a longitudinal sectional view showing a state where the bus duct is vertically installed. 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 housing the conductor 140 in a space formed between the two divided pieces.

  The housing 110 includes a conductor housing portion 115 having a rectangular cross section, a joint portion 120 extending in a direction away from both opening side edges of the conductor housing portion, and a reinforcing portion 130 substantially orthogonal to the joint portion 120. And have. 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, three-phase conductor plates 141 having an insulating coating 142 arranged in parallel.

  Such a bus duct is installed vertically on a floor surface or is suspended from a ceiling via a hanging metal fitting. At that time, a fixing metal 600 shown in FIG. 9 is used for fixing to the floor surface or the installation metal. The fixing bracket 600 includes an engagement recess having a concave cross section and a flat portion continuous to the engagement recess. The bus duct is fixed by engaging the engaging recess of the fixing bracket 600 with the substantially L-shaped reinforcing portion 130 and fastening the flat portion along the installation surface with a bolt 610 or the like.

Japanese Utility Model Publication No. 6-41329

  However, the conventional bus duct has the following problems.

(1) It is difficult to effectively suppress the lateral displacement 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 bracket, so that a certain amount of lateral blur occurs on the upper side of the bus duct. As a result, a large mechanical burden is applied to the joint portion below the conductor housing portion when the side is shaken.

(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 a connection portion. A side plate is used for the connection between the unit and the connecting portion. For example, the side plate is fixed to the outer surface of the conductor housing portion. At that time, accurate positioning of the side plate with respect to the conductor housing portion is necessary, but since the outer surface of the conductor housing portion is a flat surface, there is no guide and the workability of positioning is poor.

  Accordingly, a main object of the present invention is to provide a bus duct that can be easily and stably installed.

  Another object of the present invention is to provide a bus duct in which a side plate for connecting the bus duct unit to the connecting portion can be easily attached to the bus duct unit.

  The bus duct of the present invention has a conductor in which a plurality of conductor plates having insulating coatings are arranged in parallel, and a long housing that houses the conductor, and the housing is configured by combining a pair of long divided pieces. The The split pieces include a conductor storage portion for forming a space for storing a conductor between the two split pieces, a joint portion extending in a direction away from both opening side edges of the conductor storage portion, and an end portion of the joint portion. It has the reinforcement part orthogonal to a junction part, and the engagement protrusion provided in the outer surface of a conductor accommodating part, It is characterized by the above-mentioned. And the space | interval which accommodates a conductor is formed between both division pieces by joining the junction part which the both division pieces mutually oppose.

  In the present invention, by providing the engagement protrusion on the outer surface of the conductor housing portion, the engagement protrusion can be engaged with the fixing bracket or the suspension bracket. Therefore, the bus duct can be installed in a fixed state easily and reliably. In particular, it is possible to attach a fixing bracket or a suspension bracket using an engaging projection provided in a heavy conductor housing portion, and it is possible to effectively suppress a lateral shake even when the bus duct is placed vertically.

  The cross-sectional shape of the engagement protrusion is not particularly limited as long as it is a cross-sectional shape that can be engaged with the fixing metal fitting or the suspension metal fitting. For example, a hook-shaped engagement protrusion is suitable.

  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 protrusions continuously in the longitudinal direction of the bus duct, the engagement protrusions can also have a function as a reinforcing material for suppressing the bus duct from bending in the longitudinal direction.

  The number of engaging protrusions is at least one. It is desirable to use a pair of engaging protrusions in order to be able to engage with both the fixing bracket and the suspension bracket.

  The place where the engaging protrusion is installed is the outer surface of the conductor housing portion. In particular, it is preferable to provide a pair of engaging protrusions on the side edge portion on the outer surface of the conductor housing portion so as to face each other. Such an arrangement of the engagement protrusions makes it easy to fit the side plate between the engagement protrusions from the end of the unit. Further, when the bus duct is placed horizontally, the engaging projections can contact the installation surface with a wide interval, and the bus duct can be stably supported.

  The engagement protrusions may be formed integrally with the housing by extrusion, or the engagement protrusions formed separately from the housing may be fixed by appropriate means such as bolts, rivets, and welding. When the engaging protrusion is formed by extrusion, the engaging protrusion continuous in the longitudinal direction can be easily formed.

  As described above, according to the bus duct of the present invention, the following effects can be achieved.

  (1) By providing an engaging protrusion on the outer surface of the conductor housing, the fixing bracket can be engaged with this engaging protrusion, and the bus duct can be easily and reliably fixed on the floor surface or on the mounting bracket. Can do.

  (2) By engaging the hanging metal fitting with the engaging protrusion, the bus duct can be supported easily and stably.

  Embodiments of the present invention will be described below.

(Example 1: Vertical installation on the floor)
FIG. 1 shows a unit of a bus duct of the present invention, (A) is a front view, (B) is a plan view, and FIG. 2 is a sectional view of the bus duct of the present invention installed vertically on a floor surface.

  As shown in FIG. 1, the unit 100 has a configuration in which a conductor 140 is accommodated in a bus duct housing 110. The unit 100 has a connection portion 150 attached to an end portion thereof, and can form a line by being connected to another unit.

  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. Each of the divided pieces 110A and 110B of the housing 110 includes a conductor housing portion 115 formed in a rectangular shape in cross section, a joint portion 120 extending in a direction away from both opening side edges of the conductor housing portion 115, and a joint And a reinforcing portion 130 substantially orthogonal to the joint portion at the end of the portion.

  Here, an engaging protrusion 117 having an L-shaped cross section is formed on the outer side surface 116 of the conductor housing portion 115. The engaging protrusion 117 is formed integrally with the housing by extrusion of aluminum, and is formed over the entire length in the longitudinal direction of the housing. In this example, a pair of engaging projections 117 are provided to face both side edge portions on the outer side surface 116 of the conductor housing portion 115 in one divided piece. As will be described later, the engagement protrusion 117 is made of a material, shape, and size that are strong enough to engage with a fixing bracket or a suspension bracket.

  In addition, 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 an O-ring 122 is fitted in this groove to join the boundary between the split pieces. Prevents intrusion of foreign substances such as water from the surface.

  The split pieces are joined to the joint 120 by penetrating rivets and bolts. Here, the two split pieces are joined by caulking both flanges with a rivet 123 without forming a hole in the joint in advance.

  Further, a reinforcing portion 130 having a substantially L-shaped cross section is continuous with the joint portion 120. The reinforcing portion 130 includes a first horizontal reinforcing portion 131 connected to the joint portion 120, a vertical reinforcing portion 132 extending substantially perpendicular to the conductor housing portion side with respect to the first horizontal reinforcing portion 131, and a joint portion side from the vertical reinforcing portion 132. And a second horizontal reinforcing portion 133 extending substantially at a right angle.

  On the other hand, the conductor 140 has a configuration in which three conductor plates 141 each having an insulating coating 142 are juxtaposed. The conductor plates are arranged adjacent to each other except for both ends of the conductor 140, but the two conductor plates 141 on both sides are bent only at the end portion, and a space is provided between the conductor plates 141. ing. Further, the conductor terminal 141 is exposed by removing the insulating coating 142 from the conductor terminal.

  Next, a usage form 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 fitting 200 is hung on the engaging protrusion 117 located on the lower side, and the fixing metal fitting 200 is attached. Fix by fixing to the floor with bolts 220. A substantially L-shaped metal piece was used for the fixture 200. One end of the fixing fitting 200 is formed in a key shape that engages with the engaging protrusion, and the bus duct can be fixed to the floor surface by hooking the key shape portion 210 on the engaging protrusion 117. The fixtures 200 may be discretely arranged at appropriate intervals in the longitudinal direction of the bus duct.

  Here, if the upper end of the bus duct tries to swing to the right side, the left fixing bracket 200 pulls the bus duct to the left side through the engagement protrusion 117, and at the same time, the right fixing bracket 200 presses the housing 110, thereby Can be firmly supported from both sides. Therefore, it is possible to effectively suppress the lateral displacement of the bus duct.

  In FIG. 2, the fixing metal fitting 200 that engages only with the engagement protrusion 117 is shown. However, as shown in FIG. 3, a fixing metal fitting 230 that presses the first horizontal reinforcing portion 131 may be used together. The fixing bracket 230 has a U-shaped portion that overcomes the vertical reinforcing portion 132 and the second horizontal reinforcing portion 133 and presses the first horizontal reinforcing portion 131 from above, and penetrates the bolt 220 common to the fixing bracket 200. And fixed to the installation surface. By using the fixing bracket 230 of FIG. 3 together, the bus duct can be fixed more firmly.

  Further, in FIG. 3, the two fixing brackets 200 and 230 are used to engage the engaging protrusion 117 and press the first horizontal reinforcing portion 131. As shown in FIG. An integrated fixing bracket 240 may be used.

(Example 2: Ceiling hanging)
Next, an installation state in which the bus duct shown 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, and the hanging metal fitting 300 is hung on the engaging protrusion 117 positioned on the upper side, and the bus duct is suspended from the ceiling.

  The hanging metal fitting 300 is of an approximately L shape in which a long piece and a short piece are connected at a right angle, and a key-shaped portion 310 that engages with the engaging protrusion 117 is formed at the end of the long piece. On the other hand, a bolt hole is formed in the short piece, and the hanging metal fitting is fixed to the ceiling by inserting the bolt 320 into the bolt hole and screwing it into the ceiling.

  Here, the hanging metal fitting 300 is engaged with the engagement protrusions 117 on the right side and the left side of the bus duct, and attached to the object so that the short pieces face away from each other. The hanging metal fittings 300 may be discretely arranged at appropriate intervals in the longitudinal direction of the bus duct.

  As described above, even when the bus duct is suspended from the ceiling, the engagement protrusion 117 can be effectively used to easily perform the installation work and to realize reliable suspension support.

  5 shows a state in which the hanging metal fittings 300 are mounted in the direction in which the short pieces are separated from each other. As shown in FIG. 6, the hanging metal fittings 330 are attached so that the short pieces overlap each other, A structure may be used in which the bolt 320 is passed through and fixed to the ceiling.

  In the structure of FIG. 5, two bolts are necessary. In this example, the bolts can be attached with one bolt 320. Furthermore, in the configuration of FIG. 6, a hanging structure in which the bolt 320 is a long bolt and a gap between the short piece of the hanging fitting 330 and the ceiling may be employed.

  In addition, the engagement protrusion 117 of the bus duct of the present invention can be used for mounting the branch box. In the bus duct, a branch box may be provided at the upper part of the bus duct in order to branch current.

  In that case, as shown in FIG. 7, a branch box is mounted on the 1st horizontal reinforcement part of a bus duct upper part. FIG. 7 shows only the bottom surface 400 of the branch box. Then, the branch box and the bus duct are connected to each other on the bottom surface 400 of the branch box using the same metal fitting as the hanging metal fitting 300 shown in FIG.

(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 through an installation fitting from the ceiling.

  Here, a substantially L-shaped installation fitting 450 in which the short piece is connected to the long piece at a right angle is used to support the bus duct in a horizontally placed 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 substantially in the middle thereof. When the bus duct is placed on the long piece, the engaging projection 117 of the housing comes into contact with the installation fitting 450 and supports the bus duct.

  A fastening piece 460 is used to fix the bus duct and the installation bracket 450. The fastening piece 460 is a long and narrow metal plate bent at both ends slightly bent, and a bolt through hole is formed at the center. A bolt is passed through the fastening piece 460 in advance, and the fastening piece 460 is fitted between the engaging projections located below when the fastening piece 460 is placed horizontally.

  The bus duct in this state is placed on the installation bracket, the bolt 470 is passed through the bolt hole of the installation bracket 450, and the nut 480 is screwed into the tip of the bolt 470. By screwing the nut 480, both ends of the tightening piece engage with the engaging protrusion 117 and press the protrusion downward, so that the engaging protrusion 117 is pressed to the long piece side and the bus duct is fixed to the installation bracket 450. be able to.

  INDUSTRIAL APPLICABILITY The present invention is suitable for a bus duct housing in which a pair of divided pieces are joined and joined, and an electric conductor is housed inside.

The unit of the bus duct of the present invention is shown, (A) is a front view and (B) is a plan view. It is sectional drawing of the state which installed this invention bus duct vertically on the floor surface. It is sectional drawing of the vertical installation state of this invention bus duct which also used the fixture which presses a 1st horizontal reinforcement part together. It is sectional drawing of the vertical installation state of this invention bus duct using the fixture which performs the engagement to an engagement protrusion, and the pressing of a 1st horizontal reinforcement part simultaneously. It is sectional drawing of the state which suspended this invention bus duct from the ceiling. It is sectional drawing of the state which suspended this invention bus duct from the ceiling with the hanging metal fittings different from FIG. It is sectional drawing of the state which attached the branch box on the bus duct of this invention. It is sectional drawing which shows the state which laterally placed this invention bus duct. It is sectional drawing which shows the vertical installation state of the conventional bus duct.

Explanation of symbols

100 units
110 Bus duct housing
110A, 110B split piece
115 Conductor compartment
116 Outside
117 Engagement protrusion
120 joints
121 groove
122 O-ring
123 Rivet
130 reinforcement
131 1st horizontal reinforcement
132 Vertical reinforcement
133 Second horizontal reinforcement
140 conductors
141 Conductor plate
142 Insulation coating
150 connections
200 Mounting bracket
210 Key part
220 volts
230 Mounting bracket
240 mounting bracket
300 Hanging bracket
310 Key type part
320 volts
330 Suspension bracket
400 Bottom
450 Mounting bracket
460 Fastening piece
470 volts
480 nut
500 side plate
600 Mounting bracket
610 volts

Claims (4)

It has a conductor in which a plurality of conductor plates having insulating coatings are arranged in parallel and a long housing that houses the conductor, and the housing is configured by combining a pair of long divided pieces. A conductor housing portion for forming a space for housing a conductor between the pieces, a joint portion extending in a direction away from both opening side edges of the conductor housing portion, and a reinforcement perpendicular to the joint portion at an end portion of the joint portion A bus duct that forms a housing by joining two divided pieces at a joint portion,
The conductor housing part of the split piece has an L-shaped engagement protrusion on the outer surface on the side surface facing the plate surface of the conductor plate,
A pair of engaging protrusions are provided on both side edges of the outer surface of the conductor housing portion so that the tips of the engaging protrusions are opposed to each other, and end portions of fixing metal fittings for fixing the housing to the installation location are provided. A bus duct configured to be engaged.   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 the installation surface.   The bus duct according to claim 1, wherein the engagement protrusion is configured to engage with a suspension fitting for suspending the bus duct. The bus duct according to claim 1, wherein the engagement protrusion is provided continuously in a longitudinal direction of the bus duct.

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