JP4392923B2 - Bus duct connection - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bus duct connection portion that forms an electric trunk line in an office building or the like, and relates to a bus duct connection portion that can improve electrical connection between bus duct conductor ends and can maintain the state for a long period of time. .
[0002]
[Prior art]
Conventionally, a bus duct is used when an electric trunk line is formed in an office building or the like, and ends of the bus duct are connected to each other by a bus duct connecting portion. For example, Japanese Utility Model Laid-Open No. 55-25794 discloses a bus duct connecting portion as a technology related to the bus duct connecting portion. In this bus duct connecting portion, conductor end portions of the bus duct to be connected are overlapped with each other at least a part of the overlapping surface or the butting surface. Are welded and electrically connected.
[0003]
Japanese Patent Publication No. 53-32874 discloses another bus duct connecting portion, which is a superposed bus duct connecting portion, which is tightened with a bolt via a spring member made up of a circular disc spring washer, and according to the tightening load of the spring member. An electrical connection between the bus duct ends is disclosed.
[0004]
[Problems to be solved by the invention]
However, in the connection of the bus duct according to Japanese Utility Model Publication No. 55-25794, the connection strength between the conductor ends of the bus duct increases, but the welding work and finishing work at the construction site become necessary and the construction work becomes complicated. There was a problem that the construction cost became expensive.
[0005]
In addition, in the connection of the bus duct according to Japanese Examined Patent Publication No. 53-32874, it is a structure in which a circular disc spring washer, which is a spring member, is directly fastened to the duct side plate joint plate. However, when the conductor ends of bus ducts to be connected, which have been widely used in recent years, are connected to each other by butt contact, the pressing force by the spring member is applied to a portion other than the contact surface to be electrically connected. This causes problems such as deformation.
[0006]
The present invention has been made to solve the above-described problems, and the construction work is easy and the construction cost is low, and the pressing force by the fastening tool when connecting the bus duct is required efficiently. An object of the present invention is to provide a bus duct connecting portion that can be used while being kept high in safety by maintaining a pressing force of a contact surface to be electrically connected by being hooked on a portion.
[0007]
[Means for Solving the Problems]
The bus duct connection portion of the present invention is capable of electrically connecting the bus duct conductor end portions to be connected inserted between the insulating separators, and in the bus duct connection portion fastened to the outside via a pressing member. The pressing member is capable of pressing the electrical connection surface of the end portion of the conductor with a force with the fastening.
[0008]
The pressing is performed by forming a pressing convex portion on the pressing member and pressing the electrical connection surface with the pressing convex portion along with the fastening, or making the pressing member into a gentle substantially W shape. Etc.
[0009]
For example, a plurality of insulating separators arranged so that end portions of bus duct conductors to be connected are inserted, a duct side plate joining plate that sandwiches the insulating separator from both outsides, the insulating separator and the duct side plate joining unit. A pressing member for holding the plate from both outer sides, the insulating separator, the duct side plate joining plate, and a fastener for fastening the holding member together, the contact surface of the pressing member with the duct side plate joining plate A pressing convex portion is formed on the conductor end portion, and the pressing convex portion is a bus duct connecting portion capable of pressing the electrical connection surface of the conductor end portion as the fastener is tightened. The electrical connection surface is, for example, a contact surface between a conductive connection member and the conductor end portion arranged so as to be able to electrically connect the conductor end portions between insulating separators, or between the conductor end portions. Such as a contact surface.
[0010]
2. The bus duct connection portion according to claim 1, wherein, in the bus duct connection portion, the pressing convex portions are formed at both ends of the bus duct to which the pressing member is to be connected in the conductor length direction.
[0011]
Further, in the bus duct connecting portion, an outward reinforcing piece is provided on the pressing member. For example, it is preferable that the reinforcing piece is formed by a bent portion in which at least a part of the periphery of the pressing member is folded outward, and provided at both ends in the conductor width direction of the bus duct to which the pressing member is to be connected. Further, the bus duct connecting portion of the present invention is a duct side plate having a concave body extending in the conductor width direction at the center portion between the pressing member and the insulating separator in the bus duct connecting portion. A connecting plate is provided, and the pressing member is provided in the concave groove .
[0012]
[Action]
The bus duct connecting portion of the present invention has, for example, an insulating separator, a duct side plate joint plate, and a pressing member that are fastened together by a fastener, and a pressing protrusion on the contact surface of the pressing member with the duct side plate connecting plate, that is, the inner surface of the pressing member. A portion is formed, and the pressing force of the pressing convex portion is applied to the contact surface for electrically connecting the conductor end portions of the bus duct to be connected. At that time, in the case where the conductor ends of the same phase of the bus duct to be connected are abutted and electrically connected by attaching a conductive connecting member thereto, the contact surface between each conductor end and the conductive connecting member In addition, when the conductor ends of the bus duct to be connected are overlapped and electrically connected to each other, the pressing force of the pressing convex portion provided on the pressing member is applied to the contact surface where each conductor end overlaps. Try to hang it. Thereby, it can be used while ensuring high safety over a long period of time.
[0013]
Furthermore, by providing the pressing convex portions at both ends of the conductor length direction of the bus duct to be connected, the pressing force of the pressing convex portions can be applied only to the minimum necessary portions, and the connection of the butting method can be handled well, and Since the pressing force by the pressing convex portion is applied at at least two points at positions away from each other in the conductor length direction in the bus duct connecting portion, it is possible to connect the bus duct more stably. If the pressing projections are elongated in the conductor width direction at both ends in the conductor length direction, it is possible to apply the pressing force over a wide area at least in a line, for example, the entire conductor width, rather than applying a pressing force with a point. Therefore, the bus duct can be connected more stably.
[0014]
Further, by providing the reinforcing member outwardly on the pressing member, the strength of the pressing member itself is increased, and deformation of the pressing member against an outward force applied to the pressing convex portion can be prevented in advance. . Furthermore, when the bent portion that is turned back outwardly provided around the pressing member is used as the reinforcing piece, the manufacturing cost of the pressing member itself can be reduced, and an inexpensive bus duct connecting portion is provided as a whole. Is possible. In addition, it is preferable to provide the reinforcing pieces at both ends of the bus duct to be connected in the conductor width direction, because it effectively acts against the outward force applied to the pressing projection.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the bus duct connecting portion of the present invention will be described based on specific embodiments in the drawings. 1 is a perspective view showing a separated state of a bus duct connecting portion and a bus duct to be butt connected, FIG. 2 is a front view thereof, FIG. 3 is a perspective view of the bus duct connecting portion, and FIG. 8 is a bus duct connecting portion and a butt of the present invention. FIG. 9 is a partially sectional plan view of FIG. 8, and FIG. 10 is a partially sectional side view of the bus duct connecting portion of the present invention.
[0016]
In FIG. 1 to FIG. 3 and FIG. 8 to FIG. 10, the bus duct connecting portion 1 is provided with four plate-shaped insulating separators 2 at predetermined intervals, and the insulating separators 2 and 2 positioned on both outer sides are arranged. Duct side plate joining plates 3 and 3 are arranged on the outside, between the first and second insulation separators 2a and 2b, between the second and third insulation separators 2b and 2c, and between the third and fourth insulations. Between the separators 2c and 2d, two conductive connecting members 4 and 4 are provided along the insulating separator 2, respectively. The number of the conductive connection members 4 is not limited to two, and may be one or the like.
[0017]
The insulating separator 2 of the present embodiment is composed of six insulating separators 2m having a large square area in plan view and four insulating separators 2n having a small area (see FIG. 10). Is formed as one insulating separator 2 by one insulating separator 2m having a large area and one insulating separator 2n having a small area, and the middle insulating separator 2 is an insulating material having a small area between two insulating separators 2m having a large area. A total of three separators 2n are interposed to form one insulating separator 2. This is for ensuring the creepage distance, and there are four insulating separators 2 in the bus duct connecting portion 1. In the following, each combined insulating separator 2 is treated as one insulating separator.
[0018]
The duct side plate joint plate 3 is a plate-like body having a substantially rectangular shape in plan view, and a first bent piece 32a that bends both ends of the conductor length direction of the bus duct 8 to be connected substantially outward at a right angle, and a first bent portion. A second bent piece 32b that further bends the end of the piece 32a in the conductor length direction is formed, and has a shape having a concave groove extending in the conductor width direction at the center thereof. The width of the concave groove is appropriate as long as it is wider than the width of the pressing member 5 to be described later. However, it is preferable to make the pressing groove 5 so as to fit in, for example, slightly wider than the pressing member 5. Thereby, it is possible to prevent the holding member 5 from co-rotating by tightening the bolt 71 and, further, when the bus ducts 8 and 8 are connected to each other at the bus duct connecting portion 1, the bus duct side plate 81 is inscribed in the duct side plate joining plate 3. It is possible to insert up to one bent piece 32a, and it is possible to arrange the pressing convex portion 53 of the pressing member 5 at a favorable position, so that the workability of connection of the bus ducts 8 and 8 can be improved and the connection state is also improved. .
[0019]
A pair of pressing members 5 and 5 are provided on both outer sides of the duct side plate connecting plates 3 and 3, and the insulating separator 2, the conductive connection member 4, and the duct side plate connecting plate 3 are sandwiched by the pressing members 5 and 5. ing.
[0020]
Here, the pressing member 5 will be described in detail. 4 is a perspective view of the pressing member according to the present invention, FIG. 5 is a front view of the pressing member according to the present invention, FIG. 6 is a partial left side view of FIG. 5, and FIG. FIG. 11 is a perspective view showing a contact surface between the bus duct conductor end and the conductive connecting member.
[0021]
4 to 7, the pressing member 5 has a substantially square shape in plan view, provided with reinforcing pieces 52 formed of bent portions that are folded at both upper and lower end edges, and at both left and right end portions that are long in the conductor width direction. An elliptical pressing convex portion 53 is formed by drawing. A fastening tool insertion hole 51 is formed in a substantially central portion of the pressing member 5 so that a bolt 71 as the fastening tool 7 is inserted. 5 indicates a place where the disc spring 73 which is the fastener 7 contacts, and has a size such that a tightening force is applied to the entire pressing member 5 by tightening the bolt 71 and the nut 72. .
[0022]
The position of the pressing protrusion 53 is a contact surface for electrically connecting the conductor end portions 80a and 80a of the in-phase bus ducts 8 and 8, for example, as shown in FIG. 11, the conductive connecting member 4 and the conductor end portion 80a. It is preferable to set the contact surface to a position where a pressing force is applied. That is, the pressing convex portions 53 and 53 having a substantially elliptical shape symmetrical with respect to the conductor length direction are located on both outer sides of the plurality of conductor end portions 80a, and are on a line connecting the pressing convex portions 53 and 53 on both outer sides. Therefore, the pressing force by the pressing convex portion 53 is applied to the contact surface as it is. The left and right end pressing protrusions 53 and 53 are at the contact surface between the bus duct 8 to be connected and the conductive connection member 4 and at positions separated as much as possible in the conductor length direction around the fastener 7. By providing, the bus ducts 8 and 8 can be connected to each other more firmly and stably.
[0023]
Note that the pressing protrusions 53 of the present embodiment are formed at both ends in the length direction of the bus duct conductor 80 of the pressing member 5 in order to correspond to the connection of the bus duct 8 by a butting method or the like. In this connection, it may be in another place, or the pressing convex portion 53 may be formed and pressed only on the pressing member 5 on one side, and the contact surface may be pressed by the pressing convex portion 53. For example, the position, shape, and size of the pressing convex portion 53 are appropriate.
[0024]
In addition, when the pressing convex portions 53 are formed at both ends in the conductor length direction, a non-contact surface exists between the duct side plate joint plate 3 and the pressing member 5 due to the pressing convex portions 53, and the fastener 7 Since the tightening force is applied to the pressing convex portion 53 and deformation such as the center of the pressing member 5 is dented by the tightening force by the fastener 7, it is preferable to provide reinforcing pieces at appropriate positions as described above. . For example, in the case of the pressing member 5 in which the pressing convex portion 53 is formed at both ends in the conductor length direction, it is preferable to form the reinforcing pieces 52 at both ends of the pressing member 5 in the conductor width direction, and further outward. By making the bent portion formed by turning back into the reinforcing piece 52, the pressing member 5 can be formed at a low cost, which is even better.
[0025]
Then, substantially rectangular insertion holes 21 and 41 are formed at substantially the center of the insulating separator 2 and the conductive connection member 4, and the insulating sleeve 6 is inserted into the insertion holes 21 and 41. Further, fastening tool insertion holes 31, 51, 61 are formed at substantially the center of the duct side plate joining plate 3, the pressing member 5, and the insulating sleeve 6, and the bolt of the fastening tool 7 including the bolt 71, the nut 72, and the disc spring 73. 71 is inserted. The bus duct connecting portion 1 has an insulating separator 2, a duct side plate joint plate 3, a conductive connecting member 4, and a holding member 5. A bolt 71 and a nut 72 are inserted into a fastening tool insertion hole 61 of the insulating sleeve 6. The unit is provisionally assembled even when the bus duct 8 is not connected.
[0026]
The bus ducts 8 and 8 are connected by the bus duct connecting portion 1 as follows.
[0027]
First, an insulating coated conductor 80 is led to the end portion of the bus duct 8 to be connected, and a plurality of plate-like conductor end portions 80a are provided at predetermined intervals, and connected to both outer sides of the conductor end portion 80a. In order to facilitate the work, a bus duct side plate 81 having an inward stepped portion 81a is provided.
[0028]
The opposing bus ducts 8 and 8 are inserted into the vicinity of the insulating sleeve 6 between the two conductive connection members 4 and 4 disposed between the insulating separators 2 and 2 with the respective conductor end portions 80a interposed therebetween, The in-phase conductor ends 80a and 80a are electrically connected to each other via the conductive connecting member 4, and the bus duct side plates 81 and 81 are positioned so as to contact the inner side surfaces of the both duct side plate joining plates 3 and 3. Then, screws 82 are inserted into holes provided in the duct side plate joining plate 3 and the bus duct side plate 81 and fixed by screws or the like. At this time, the insulating separator 2 insulates between the conductor end portions 80a and 80a of different phases and between the outermost conductor end portion 80a and the duct side plate joining plate 3. Then, a disc spring 73 is provided so as to push the duct side plate joint plate 3 with the pressing member 5, a bolt 71 is inserted into the fastener insertion hole 51, etc. via the disc spring 73, and a nut 72 is tightened to connect the bus duct connecting portion 1. Is configured to connect the bus ducts 8 and 8 together.
[0029]
Note that a branching gap 10 is formed between the conductor end 80a of the bus duct 8 to be connected and between the conductive connection members 4 as a receiving connection part so that a plug-in branching terminal such as a branching box can be inserted. The plug branch terminal inserted into the branch gap 10 is sandwiched and branched by the conductive connection members 4 and 4 located on both sides. The branch gap 10 is formed above the conductor end portion 80a and between the conductive connection members 4 and 4 by providing the conductive connection member 4 wider than the conductor end portion 80a as in the present embodiment. The number of branch terminals that can be inserted can be increased.
[0030]
Further, the bus duct connecting portion 1 connecting the opposing bus ducts 8 and 8 is provided with a cover member 11 for preventing intrusion of dust or the like on the open surface corresponding to the branch where the receiving connecting portion is located. The cover member 11 is formed in a substantially U-shaped cross section, and a plug-in opening 11a having a size into which at least a plug-in branching terminal such as a branching box can be inserted is formed at a substantially central portion. The cover member 11 is fitted from the outside of the duct side plate joint plate 3 of the receiving connection portion, and is fixed by screwing screws 9 or the like into the bus duct 8 from the outside of the cover member 11.
[0031]
Next, another embodiment of the pressing member in the present invention will be described. FIG. 13 is a perspective view showing the pressing member of the second embodiment, FIG. 14 is a perspective view showing the pressing member of the third embodiment, and FIG. 15 is a perspective view showing the pressing member of the fourth embodiment.
[0032]
The pressing member 5 shown in FIG. 13 has a fastener insertion hole 51 formed substantially at the center and has elongated pressing protrusions 53 and 53 formed at both left and right ends, and does not have a reinforcing piece. . In this case, it is preferable to increase the thickness of the pressing member 5 in order to increase the strength of the pressing member 5 itself.
[0033]
In FIG. 14, the pressing member 5 has a fastener insertion hole 51 formed substantially at the center, and one pressing convex portion 53 is provided above and below the both ends of the conductor length direction. Pieces 52 and 52 are formed. In the present embodiment, the reinforcing pieces 52 are formed at both upper and lower edges, but when the pressing protrusions 53 are provided one above and below the both ends in the conductor length direction, etc., in order to further prevent the pressing member 5 from being deformed, It is preferable that the reinforcing piece 52 is provided around the entire periphery of the upper and lower end edges and the left and right end edges of the pressing member 5.
[0034]
The pressing member 5 in FIG. 15 has a fastener insertion hole 51 formed substantially at the center, and elongated pressing convex portions 53 and 53 are formed at both left and right ends. It is attached to both ends by welding or the like. Moreover, it is good also as a structure to which the pressing convex part 53 of another member is attached by welding.
[0035]
The pressing protrusion 53 is included in the present invention as long as it is formed on the contact surface of the pressing member 5 with the duct side plate joint plate 3 and can press the electrical connection surface of the conductor end portion 80a of the bus duct 8.
[0036]
Next, an embodiment of the bus duct connecting portion of the present invention when the bus ducts are connected by the superposition method will be described. FIG. 12 is a partial cross-sectional plan view showing a connection state of the bus duct connecting portion and the bus duct to be overlap-connected according to the present invention.
[0037]
The bus duct connecting portion 1 in FIG. 12 is substantially the same as the configuration of the bus duct connecting portion 1 by the above-described butting method. However, in the case of the overlapping method, a conductor width is provided at each conductor end 80a of the bus duct 8 to be connected. A concave portion 80b in the conductor length direction is formed at a substantially central position in the direction, and when each conductor end portion 80a is inserted between the insulating separators 2 and 2 and connected in an overlapping state, each concave portion 80b It will be in the state fitted in the insulating sleeve 6 which becomes obstructive at the time of insertion of the edge part 80a.
[0038]
The conductor end portions 80a and 80a overlap each other in the bus duct connecting portion 1 and are electrically connected to each other, and the pressing protrusion 53 of the pressing member 5 has a pressing force on the contact surface of the overlapping conductor end portions 80a and 80a. It is provided to hang. If the pressing force is applied to the contact surface, the position, shape, number, and the like of the pressing protrusions 53 are appropriate. However, when a plurality of pressing protrusions 53 are provided, the contact surface of the pressing protrusions 53 is contacted. If a portion that does not overlap with each other is formed, the portion may be dented and the duct side plate joint 3 itself may be deformed. Therefore, it is desirable that all the pressing convex portions 53 overlap the contact surface. Moreover, it is not necessary for one pressing convex part 53 to press the contact surface as a whole, and only a part of the pressing convex part 53 may press the contact surface.
[0039]
As mentioned above, although embodiment of the bus duct connection part of this invention was described, this invention is not limited to the said embodiment, The following expansion and deformation | transformation can be carried out.
[0040]
In the above embodiment, the bus duct connecting portion 1 of the three-wire bus duct 8 has been described. However, the present invention is not limited to this, and a pressing member having a pressing convex portion is also provided for a two-wire or four-wire or more bus duct. If the pressing force by the pressing protrusion is applied to the contact surface to be electrically connected, it is included in the present invention.
[0041]
In the embodiment described above, the shape of the pressing member 5 has been described so as to be substantially rectangular in plan view. However, the shape, size, number, and the like of the pressing member are not limited to the above embodiment, and the large capacity In the case of a bus duct, the number may be increased. Further, the shape, size, number, formation location, etc. of the pressing convex portion and the reinforcing piece, and the shape, configuration, connection method and the like of the bus duct and the bus duct connecting portion are not limited to the above embodiment.
[0042]
【The invention's effect】
Since the bus duct connecting portion of the present invention has the above-described configuration, the construction work is easy and the construction cost is low, and the pressing force by the fastening tool when connecting the bus duct is efficiently applied to the necessary place. Thus, there is an effect that the pressing force of the contact surface to be electrically connected is maintained and the contact surface can be used while ensuring high safety over a long period of time.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a separated state of a bus duct connecting portion and a bus duct to be butt-connected according to the present invention.
FIG. 2 is a front view showing a separated state of a bus duct connecting portion of the present invention and a bus duct to be butt-connected.
FIG. 3 is a perspective view of a bus duct connecting portion according to the present invention.
FIG. 4 is a perspective view of a pressing member in the present invention.
FIG. 5 is a front view of a pressing member according to the present invention.
6 is a partial cross-sectional left side view of FIG. 5;
7 is a partially sectional bottom view of FIG. 5. FIG.
FIG. 8 is a front view showing a connection state of the bus duct connecting portion of the present invention and the bus duct to be butt-connected.
9 is a partial sectional plan view of FIG. 8;
FIG. 10 is a partial cross-sectional side view of the bus duct connecting portion of the present invention.
FIG. 11 is a perspective view showing a contact surface between a bus duct conductor end and a conductive connecting member.
FIG. 12 is a partial cross-sectional plan view showing the connection state of the bus duct connection portion and the bus duct to be overlap-connected according to the present invention.
FIG. 13 is a perspective view showing a pressing member according to a second embodiment of the present invention.
FIG. 14 is a perspective view showing a pressing member according to a third embodiment of the present invention.
FIG. 15 is a perspective view showing a pressing member according to a fourth embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Bus duct connection part 2, 2a, 2b, 2c, 2d, 2m, 2n Insulation separator 3 Duct side plate joint 4 Conductive connection member 5 Holding member 52 Reinforcement piece 53 Pressing convex part 7 Fastening tool 8 Bus duct 80a Conductor end part 81 Bus duct side plate 11 Cover member

Claims (4)

The bus duct conductor ends to be connected inserted between the insulating separators can be electrically connected to each other,
In the bus duct connection part that is fastened to the outside via a holding member,
A pressing projection is formed on the pressing member,
The bus duct connecting portion, wherein the pressing convex portion presses the electrical connecting surface of the conductor end portion with the fastening . The pressing convex portion, the pressing bus duct connection part according to claim 1, characterized in that it is formed in the conductor longitudinal direction both end portions of the bus duct to be connected member. Bus duct connection of claim 1, wherein the reinforcing strip outward is provided on the pressing member. Between the pressing member and the insulating separator, a duct side plate joint plate having a concave groove extending in the conductor width direction is provided at the center portion in a plate-like body,
The bus duct connecting portion according to claim 1, wherein the pressing member is provided in the concave groove .

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