JP2007300734A - Bus duct and waterproof construction of joint in bus duct - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a contact-type insulating bus duct that can be constructed without increase in a number of bus duct parts and with structural stability maintained. <P>SOLUTION: One of two housing halves is constructed as a lower housing half 12 having: a supporting flat plate portion 12a that, when placed and fixed, supports a laminated insulating coated conductor from beneath; and supporting legs 12b that are substantially perpendicularly extended downward from the long sides of the supporting flat plate portion 12a and whose tips are bent and abutted against a supporting surface. The other housing half is constructed as a upper housing half 14 having: an upper flat plate portion 14a that, when placed and fixed, covers the upper face of the laminated insulating coated conductor; and side face cover portions 12b that are substantially perpendicularly extended downward from the long sides of the upper flat plate portion 14a by a length substantially equal to the laminate thickness of the insulating coated conductor and whose tips are bent and joined with the outer surface of the supporting flat plate portion of the one housing half when installed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a bus duct and a waterproof structure for a connecting portion of the bus duct, and more particularly to a bus duct used mainly outdoors and a waterproof structure for the connecting portion of the bus duct.

  Conventionally, a close-insulated bus duct (hereinafter simply referred to as a “bus duct”) in which a plurality of insulation-coated conductors that are closely stacked are stored in a storage portion formed by joining two housing halves and installed at a predetermined location. )It has been known. And the bus duct trunk line which connects the conductor edge part which accommodated such a bus duct in the connection part which electrically connects mutually is made into the desired length.

  When this type of bus duct trunk line is installed outdoors, for example, the bus duct is placed horizontally on the upper surface of the support portion of the bus duct support means provided at predetermined intervals so that the inner insulated conductors are laminated in the vertical direction. The structure which mounts and fixes is taken. In such an outdoor installation configuration, it is important to secure a waterproof structure that can withstand wind and rain with respect to the bus duct and its connecting portion.

  As this waterproof structure, a technology that completely encloses the entire bus duct with a waterproof cover is known, but this increases the number of parts, the overall size of the device, and the heat dissipation due to the formation of multiple covering structures. It becomes a structure inferior to. Thus, for example, Patent Document 1 discloses a waterproof bus duct having a relatively simple structure. As shown in FIG. 1 of the same document, the insulated body in which the housing body (1) of the bus duct is laminated is covered with a U-shape from above, and both side walls of the housing body (1) are legs. A bottom cover (2) is fitted inside, and the bottom cover (2) is fixed to the housing body (1) at a position higher than the lower end of the leg by fastening means. The insulated conductor laminated | stacked in the accommodation space formed in this is accommodated.

  That is, the laminated insulated conductor is supported by the bottom cover (2) from below and covered by the housing body (1) from above. Further, the fastening means fixes the long nut portion to the inner surface of the housing body (1) by welding or the like without penetrating the housing body (1). There are no gaps intruding. Therefore, by installing the leg portion side down, it is possible to install a waterproof bus duct.

Japanese Utility Model Publication 57-170632

  However, the bus duct disclosed in Patent Document 1 has a structure in which the bottom cover is suspended from the housing body, and therefore, the entire load of the insulation-coated conductor is applied to the fastening means (bolts) that support the bottom cover. Therefore, in order to achieve the stability of this structure, the number of bolts must be increased to ensure a structure that can withstand the load for a long time. Therefore, the number of welded portions of the long nut is inevitably increased, and the manufacturing work of the bus duct becomes complicated. In addition, it is necessary to propose a waterproof structure that ensures heat dissipation for the waterproof structure of the connecting portion of the bus duct trunk line constituted by connecting such bus ducts.

  The present invention has been made in view of the above problems, and its object is to provide a bus duct that can be constructed without increasing the number of parts of the bus duct and ensuring the stability of the structure, and the waterproofing of the connecting portion of the bus duct. To provide a structure.

In order to achieve the above object, a bus duct according to claim 1 is:
In a bus duct in which a plurality of conductors are housed in two housing halves to be joined and fixed, one of the two housing halves is
It is configured as a lower housing half having a support flat plate portion that supports the conductor from below, and a support leg portion that extends downward at a substantially right angle from the long side portion of the support flat plate portion and has a bent tip portion. The other of the two housing halves is:
An upper flat plate portion covering the upper surface side of the conductor, and extending downward at a substantially right angle from the long side portion of the upper flat plate portion, the tip portion is bent and joined to the outer surface of the support flat plate portion of the one housing half. And an upper housing half having a side cover portion.

  According to the said structure, the conductor is accommodated in the accommodating part in the state mounted on the upper surface of the support flat plate part of a lower housing half body. The upper surface side of the conductor is covered with the upper housing half, and the tip of the side cover portion of the upper housing half is joined and installed on the support flat plate portion of the lower housing half. That is, the upper housing half is placed on the support flat plate portion of the lower housing half together with the conductor. Instead of applying a load to the fastening means, the load is applied to the support legs of the lower housing half.

  Therefore, there is no need to install fastening means for supporting the weight of the conductor, and the structure can be simplified. In addition, for example, a close-insulated bus duct in which conductors are insulated and laminated, and if the extension length of the side cover portion of the upper housing half is adjusted to approximately the same size as the laminated thickness of the insulated conductor, Since it is installed in the mounted state, adjustment with the length of the supporting leg portion of the lower housing half is unnecessary, which is preferable.

The bus duct according to claim 2 is:
The support leg portion of the lower housing half and the side cover portion of the upper housing half are formed so that the outer surfaces thereof are flush with each other in the installed state. With this configuration, the load of the upper housing half is applied almost directly above the support leg portion of the lower housing half via the side cover portion. Therefore, the load resistance of the support leg portion of the lower housing half can be effectively utilized, and the support structure of the upper housing half can be stabilized by the lower housing half.

The bus duct according to claim 3 is:
The lower housing half and the upper housing half are formed by bending a plate having a common dimension in the width direction. According to this configuration, the structure of each housing half is simple, and both the housing halves can be easily formed by a plate material having a common width direction dimension, thereby simplifying the manufacture of the bus duct. Also, inventory management becomes easy.

The bus duct according to claim 4 is:
The lower housing half and the upper housing half are formed by using a base material whose surfaces including their end faces are subjected to rust prevention treatment. Thereby, the rust prevention of the bus duct is secured, and the rust prevention is secured even in the case of the structure in which the bent end is exposed to the outside.

The bus duct according to claim 5 is:
The two housing halves are joined with a waterproof means interposed between the support flat plate portion of the lower housing half and the tip of the side cover portion of the upper housing half. To do.

  The lower housing half and the upper housing half in the bus duct according to the present invention are joined by the support flat plate portion of the lower housing half and the tip of the side cover portion of the upper housing half. . Therefore, by providing a waterproof means (for example, waterproof packing) in the part, the waterproofness of the storage part in which the conductor is stored is ensured.

The bus duct according to claim 6 is:
The tip of the support leg of the lower half of the housing and the tip of the side cover of the upper half of the housing are bent substantially perpendicularly to the inside in the bus duct width direction. With this configuration, the end portions of the support leg and the side cover part, that is, the end surfaces of the plate members constituting the housing half are bent to the inside of the support leg part and the side cover part, respectively, and there are few parts exposed to the outside It has become. Therefore, waterproofness and rustproofness are improved.

The bus duct according to claim 7 is:
The lower housing half and the upper housing half are fixed by fastening means that pass through the support flat plate portion of the lower housing half and the upper flat plate portion of the upper housing half, It is characterized in that a curved dish washer and a waterproof sealing material are interposed at least between the fastening means and the outer surface of the upper flat plate portion.

  In the present invention, since the entire weight of the conductor is applied to the support flat plate portion of the lower housing half, the fastening means does not receive the load. Therefore, the minimum number of installations is sufficient, and the fastening work is performed by penetrating the support flat plate portion of the lower housing half and the upper flat plate portion of the upper housing half as in the above configuration. Is extremely easy. In addition, since the dish washer and the waterproof seal material are interposed in the portion of the fastening means that penetrates the upper flat plate portion of the upper half of the upper housing at the top, waterproofness is also ensured.

The bus duct according to claim 8 is:
The lower housing half and the upper housing half are fixed by riveting the support flat plate portion of the lower housing half and the bent tip portion of the side cover portion of the upper housing half. It is characterized by being performed by fastening means for fixing. As described above, in the present invention, since the total weight of the conductor is applied to the support flat plate portion of the lower housing half, it is not a structure that receives the load at the joint fixing portion of both housing halves. Therefore, it is sufficient to simply fix the two housing halves in order to prevent misalignment, and it is possible to fix by simply fixing the support flat plate portion and the bent tip portion of the side cover portion by riveting. Can be completed. In addition, since the fastening means is not exposed from the upper flat plate portion of the upper housing body, the design is improved, and the waterproof treatment of the fastening portion is not required and the cost is reduced.

The connecting structure waterproof structure of the bus duct according to claim 9
A connection part waterproof structure in which a plurality of bus ducts according to any one of claims 1 to 8 are connected and connected at a connection part, and the connection part of the bus duct trunk line is covered with a waterproof cover. An upper lid having a top surface covering the connecting portion; a side wall portion hanging from an edge of the upper surface portion in a state where the cover is placed over the connecting portion; and a supporting leg portion of the half housing. A side plate that covers at least a part of the outer side of the side cover portion and the side surface of the connecting portion; and a lower lid that closes the lower surface side of the connecting portion, and the upper end portion of the side plate is a side wall of the upper lid. It is accommodated in the inside of a part and installed so that a lower end part may be covered with the said lower cover.

  In this way, since the structure of the bus duct has a simple external structure, a waterproof structure can be achieved by a simple structure of the upper lid, the side plate, and the lower lid, and the lower lid on the lowermost side is the upper part. Since the side plate is arranged inside the side wall of the upper lid located at the uppermost position, it is possible to reliably prevent rainwater flowing down from above from entering the storage unit. Can do.

The connecting part waterproof structure of the bus duct according to claim 10
The position of the fastening means according to claim 7 or 8, wherein the lower lid has a bent portion extending upward at an edge portion in the installed state, and an upper end portion of the bent portion is present in the vicinity of the connecting portion. It is characterized in that it is arranged at a position closer to the connection part than. With this configuration, even when rainwater collects or enters the fastening means, it is possible to prevent water from entering the lower lid.

  According to the bus duct and the waterproof structure of the connecting portion of the bus duct according to the present invention, it is possible to improve the stability of the structure and the installation state while ensuring good waterproofness and heat dissipation and without increasing the number of parts of the bus duct. be able to. Further, the waterproof property of the connecting portion of the bus duct trunk line connecting the bus duct according to the present invention can be accurately ensured with a simple structure, facilitating the manufacture of the bus duct placed and installed on the bus duct support means, Reliability can be improved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic longitudinal sectional view showing a configuration of a close-insulated bus duct (hereinafter referred to as “bus duct”) according to the present invention, and FIG. 2 is an exploded view of the components. As shown in the figure, the bus duct 10 includes two housing halves, a lower housing half 12 and an upper housing half 14, which are closely stacked on a storage portion formed by a combination of both housing halves 12 and 14. Three layers of the insulation-coated conductor 16 are accommodated.

  Both the housing halves 12 and 14 are formed by cutting a predetermined base material made of a plate-shaped steel plate, which has been preliminarily coated as a rust preventive treatment, into a predetermined shape and size and bending it. First, the lower housing half body 12 is bent substantially perpendicularly downward at a predetermined length from both ends in the width direction of the steel sheet, and has a substantially U-shaped cross section. The flat plate portion on the upper and lower sides in the figure is a portion on which the insulating coated conductor 16 is placed, that is, a supporting flat plate portion 12a that supports the insulating coated conductor 16 from below. The bent side portions are support leg portions 12b that support the entire bus duct. Further, the distal end portion of the support leg portion 12b is an installation bent portion 12c that is bent substantially at right angles to the inner side in the width direction of the bus duct. As shown in FIG. 2, through holes 12d are formed in both side portions of the support flat plate portion 12a.

  Next, the upper housing half 14 is bent substantially at a right angle downward at portions of a predetermined length from both ends in the width direction of the steel plate, and has a substantially U-shaped cross section. The upper flat plate portion in the drawing is an upper flat plate portion 14 a that covers the upper surface portion of the insulating coated conductor 16. The bent side portions are side surface cover portions 14 b that cover the side surface portions of the insulating coated conductor 16. The front end portion of the side cover portion 14b is a joint bent portion 14c that is bent substantially at right angles to the inner side of the bus duct 10 in the width direction. Note that the length of the side cover portion 14b in the vertical direction in the drawing is substantially the same size as the thickness of the three insulation-coated conductors 16 stacked. Further, as shown in FIG. 2, through holes 14d are formed in both side portions of the upper flat plate portion 14a.

  As understood from FIG. 1, the upper housing half 14 is covered from the upper side of the insulating coated conductor 16 placed on the upper surface of the support flat plate portion 12 a of the lower housing half 12, and the inner half of the upper flat plate portion 14 a. It is installed so that the insulation coating conductor 16 is pinched | interposed between a side surface and the upper surface of the support flat plate part 12a. As described above, since the length of the side cover portion 14b in the vertical direction is substantially the same as that of the three-layer insulating covering conductor 16, the insulating covering conductor 16 is formed by the lower housing half 12 and the upper housing half 14. It is securely stored in the formed space (storage part).

  In the present embodiment, as shown in FIG. 2, the fastening means for fixing both housing halves 12, 14 are the support flat plate portion 12 a and the upper flat plate portion at the positions on both sides in the width direction of the insulating coated conductor 16. 14a is provided. That is, the coupling means has a bolt 18 inserted into the through holes 12d and 14d and a nut 20 for receiving the bolt 18 and is tightened through the flat plate portions 14a and 12a of the upper and lower housing halves 14 and 12. A dish washer 22 is installed at the head portion of the bolt 18 protruding above the upper flat plate portion 14 a of the upper housing half 14, and a waterproof seal material 24 is installed below the dish washer 22. Further, a plate washer 28 and a spring washer 30 are also provided on the portion of the nut 20 disposed in the portion of the through hole 12d of the support flat plate portion 12a. A waterproof packing 26 is also installed between the joint bent portion 14c, which is a joint portion between the lower housing half 12 and the upper housing half 14, and the support flat plate portion 12a to prevent water from entering the storage portion. ing. As an additional function of the dish washer 22, it is possible to prevent rainwater from staying in the through hole 14d of the upper housing half 14 due to the inclination of the washer. Intrusion can be effectively prevented.

  In addition, as a material of the waterproof seal material 24, it is preferable that the waterproof seal material 24 is composed of a member that exhibits a sealing performance by being crushed, such as rubber such as butyl rubber, acrylic rubber, or chloroprene rubber, or a felt material. Further, the waterproof packing 26 may be a resin other than the rubber or felt material, and it is preferable to use a material having adhesiveness on both sides, whereby the bonding bent portion 14c and the support flat plate portion 12a are adhered to each other. Thus, the waterproof property can be further improved. Further, when a short circuit accident occurs, force acts in the direction in which the conductors are separated from each other. In this case, the waterproof packing 26 acts in the direction in which the upper and lower housing halves 14 and 12 are brought into close contact with each other. The strength of the housing is increased, and the resistance to shock at the time of a short circuit is increased. The waterproof packing 26 itself is not limited to having adhesiveness, and an adhesive double-sided tape may be attached to both sides of the waterproof packing 26, and an adhesive material such as an adhesive is applied to both surfaces of the waterproof packing 26. May be.

  In the present embodiment, rainwater does not enter the storage portion between the lower housing half 12 and the upper housing half 14 as described above. It should be noted that even if rainwater has entered the housing, the dish washer 28 and the support flat plate portion 12a of the lower housing half 12 can be drained from the through hole 12d of the lower housing half 12. Although no waterproof sealing material is provided between them, a waterproof sealing material may be provided as needed.

  FIG. 1 shows a state in which the lower housing half 12 and the upper housing half 14 are fastened by the nut 18 when the above-mentioned fastening means 18 is reached, and the insulation-coated conductor 16 is connected to the lower housing half 12. It is understood that the two housing halves 12 and 14 are accommodated in a state of being placed on the support flat plate portion 12a. That is, the load load of the insulating covering conductor 16 and the upper housing half 14 is not applied to the fastening means 18 and 20, and the fastening means 18 and 20 attach the insulating covering conductor 16 between the support flat plate portion 12a and the upper flat plate portion 14a. It is sufficient if the strength and the number that can be sandwiched between the lower housing half body 12 and the upper housing half body 14 and can secure the position of the upper housing half body 14 are secured. In other words, the loads of the insulating coated conductor 16 and the upper housing half 14 are applied to the support flat plate portion 12a of the lower housing half 12 and are supported by the support legs 12b. Note that a plurality of fastening means are provided at predetermined intervals along the length direction of the insulation-coated conductor 16.

  In the present embodiment, when the upper housing half 14 and the lower housing half 12 are superposed, the support leg 12b and the side cover 14b are vertically overlapped, that is, the support leg 12b. The support flat plate portion 12a and the upper flat plate portion 14a are set to have substantially the same width dimension so that the outer surface of the side cover portion 14b is flush with the other. Thereby, the structural strength of the support leg 12b of the lower housing half 12 can be effectively utilized, and the support state can be stabilized like the lower housing half 12. Further, even when a load is applied to the upper housing 14 such that an operator or the like walks on the bus duct 10, the load is applied to the supporting leg portion 12 b of the lower housing 12 from right above the side surface via the bar portion 14 b. Since the load is applied and the load applied to the surface portion of the support flat plate portion 12a of the lower housing half 12 is small, the strength is increased and the load resistance is improved.

  Further, the bending length of the joint bending portion 14c of the upper housing half 14 is set to a length that does not interfere with the shaft of the bolt 18 serving as a fastening means that penetrates and extends to the vicinity of the shaft. Therefore, it is not necessary to perform the process of opening the through hole of the bolt in the joint bending portion 14c. Moreover, since the pressing part of the dish washer 28 opposes the edge part of the joining bending part 14c, a deformation | transformation of the edge part of a horizontal part can be prevented more effectively. Further, since both sides of the upper housing half 14 are U-shaped, the upper housing half 14 is not deformed even when the fastening means 18 and 20 are tightened, and the upper flat plate portion 14a and the side cover portion are not deformed. There is no need to separately provide a reinforcing member in the space R surrounded by 14b, the support flat plate portion 12a, and the conductor end.

  Further, since the upper housing half 14 is mounted on the lower housing half 12, the upper housing half 14 is fixed to the lower housing half 12 with screws or the like other than the fastening means 18 and 20. There is no need. Therefore, construction becomes easy and the number of parts can be reduced.

  FIG. 3 shows an overall configuration of a bus duct 1 piece according to the present invention having the above-described configuration. FIG. 3 (A) is a view seen from the upper housing half 14 side, and FIG. 3 (B) is a side view. A view is shown. As shown in the drawing, both ends of the insulation coating portion of the insulation coating conductor 16 housed therein are exposed, and the other portions are covered by the housing halves 12 and 14 described above.

  The number of fastening means (bolts 18) for fixing the upper and lower housing halves 14 and 12 is the same as the number necessary for sandwiching the insulated conductors 16 in the vicinity of both side edges of the housing (four in FIG. 3 each). Each). End plate portions 34 having an enlarged width in the thickness direction are provided at both longitudinal ends of the lower housing half body 12 and the upper housing half body 14. In the present embodiment, the upper plate portion 14 a and the support plate are supported. The flat plate portion 12a is extended and bent. The insulated conductor 16 is in a state where the three layers of conductors are separated from the contact state by a predetermined interval at the end plate portion 34, and the other insulated conductor 16 (others) at the conductor end portion 16a from which the insulation coating is removed. The conductor is housed in the bus duct and exposed from the end of the bus duct).

FIG. 4 shows a state in which the above-described bus duct 10 is installed on a support plate 40a having an upper surface formed in the upper part of a bus duct support frame 40 as a bus duct support means and having a horizontal surface. As shown in the figure, the bus duct 10 is placed in a state where the installation bent portion 12c of the lower housing half 12 is brought into contact with the upper surface of the support plate 40a. The upper housing half 14 is similarly placed on the upper surface of the support flat plate portion 12a in a state where the upper flat plate portion 14a is in contact therewith. That is, the upper surface of the support flat plate portion 12a with which the lower surface of the joint bending portion 14c comes into contact is a joint portion between the housing halves (note that the fastening means, waterproof packing, etc. are not shown).
And the three-layer insulation coating conductor 16 is accommodated in the space formed between the support flat plate part 12a and the upper flat plate part 14a. In this way, the total weight of the insulating coated conductor 16 and the total weight of the upper housing half 14 are received by the support flat plate portion 12a and supported by the support leg portion 12b. Accordingly, the fastening means 18 and 20 (see FIG. 1) for fixing the lower housing half 12 and the upper housing half 14 are not provided to support the weight of the insulation-coated conductor 16, but are described above. Thus, it functions only for sandwiching the insulating coated conductor 16 and for positioning and fixing the lower housing half 12 and the upper housing half 14.

  The bus duct 10 is fixed to the support plate 40a by a fixing bracket 42 having a predetermined width that holds the outside of the bus duct 10 from above as shown in the figure. The fixing brackets 42 are arranged at predetermined intervals, and are fixed by the fastening portions 43 at the portions of the mounting bent portions 42a that are bent and abutted on the support plate 40a, and the bus duct 10 is fixedly attached to the support plate 40a. ing.

  FIG. 5 is a partially extracted view of the state in which the bus duct 10 according to the above-described embodiment is connected and the bus duct trunk line is installed on the bus duct support base 40, and is illustrated from the thickness direction. As shown in the drawing, two bus ducts 10-1 and 10-2 are connected to each other while electrically connecting the conductor end portions 16 a of the insulating coated conductor 16 at the connection portion 50. In addition, the connection part 50 is comprised using the connection unit, and in this Embodiment, the example which employ | adopted what is called the butt | matching system which abuts conductor end parts as a connection method and connects using a contact plate is shown. However, this connection structure is a well-known technique and will not be described in detail.

  What is important in the present embodiment is a waterproof structure applied to the connecting portion 50, and its constituent elements are shown in exploded form in FIGS. 6 (A) and 6 (B). As shown in the figure, an upper lid 52 is placed on the uppermost portion of the bus duct in an installed state so as to cover the entire connecting portion 50, and is installed with its lower end abutting on the upper housing half 14. The upper lid 50 has a side portion 52a bent downward at substantially right angles around the entire periphery thereof, and the tip end portion of the side portion 52a is further bent inward at substantially right angles to reliably prevent intrusion of rainwater and the like. .

  Next, a side plate 54 is provided at the lower portion of the upper lid 52 so as to sandwich the connecting portion 50 from both sides in the width direction (see FIG. 5B). Further, both left and right ends of the side plate 54 in the drawing are installed in contact with the outer side surfaces of the lower housing half 12 and the upper housing half 14 of the bus duct 10 and the support leg 12b and the side cover 14b. The side part which does not have the protrusion part in the part 50 is comprised. That is, a small side portion without a protruding portion is formed. Further, as shown in FIG. 5A, a waterproof packing 56 is provided on the inner surface of the side plate 54 in a range along the edge shape of the end plate portion 34 of the connection portion 50. This waterproof packing 56 reliably prevents water from entering the connecting portion 50 from the side plate 54 side. In addition, the side plate 54 has a bent portion 54a bent at a substantially right angle on the inner side at the lower end in the figure, and has a L-shaped cross section.

  Next, a lower lid 58 that covers the lower surface side of the connecting portion 50 is provided below the side plate 54. The lower lid 58 has a substantially U-shape as shown in FIG. 6A, and has a side wall portion 58a bent upward at substantially right angles at both left and right ends in FIG. . The lower lid 58 is installed so as to cover the bent portion 54 a formed at the lower end portion of the side plate 54 from below, and covers the lower surface side of the connecting portion 50.

  As can be understood from FIG. 5, the upper lid 52 covers the entire region including the other member side plate 54 and the lower lid 58 for covering the waterproofing of the connecting portion 50 described above from the upper side. Is effectively prevented. Further, the side of the connecting portion 50 is also kept watertight by a side plate 54 and a waterproof packing 56 provided on the side plate 54.

  Further, as shown in FIG. 5, the bent portion 58a bent above the lower lid 58 is provided with a fastening means (bolt 18 or the like) located closest to the connecting portion 50 of the bus duct 10 in the installed state. It is configured to stand up from the position, that is, at a position closer to the connecting portion 50. Therefore, even if water is generated in the housing portion of the bus duct 10 and the water leaks out from the through hole 12d (see FIG. 2) where the fastening means is installed, it is ensured that the water enters the connecting portion 50. The configuration can be prevented.

  In addition, the components of the connection portion waterproof structure, the upper lid 52, the side plate 54, and the lower lid 58 described above, in the installed state, the upper lid 52 covers the upper end portion of the side plate 54 from above, and the lower lid 58 is the lower end portion of the side plate 54. The bent portion 54a is covered from below, and the lower open portion between the side plates 54 on both sides is closed. Thereby, the penetration | invasion of the rainwater etc. to the connection part 50 is exactly achieved with the simple shape with few unevenness | corrugations to the outward.

  Next, FIG.7 and FIG.8 has shown the waterproof structure of the corner part of the bus duct trunk line mentioned above. FIG. 7 shows a configuration bent horizontally at a right angle, and FIG. 8 shows a configuration bent vertically downward. In the figure, elements similar to those of the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted. As shown in both figures, connection units 70-1, 70-2 and 80-1, 80-2 are installed at two places before and after the corner, and horizontally between these two connection units. Insulated coated conductors 72 and 82 formed vertically are connected. The difference from the waterproof structure of the connecting portion 50 shown in FIGS. 5 and 6 is that each component is bent at a right angle so as to correspond to a right-angled bent shape.

  That is, in the horizontal bending configuration of FIG. 7, the upper lid 74 is horizontally bent at a right angle, and the side plate 76 is connected to the outer side plate 76-1 and the inner side plate 76-2 of the right bent portion, respectively. The shape is bent at a right angle so as to follow the shape, and the lower lid 78 is also bent at a right angle in the same manner as the upper lid 74.

  The configuration of each other element is the same as the basic configuration shown in FIGS. 5 and 6 above, and the uppermost upper cover 74 is installed from above so as to cover the entire connection portion 50, and the upper housing half 14 is And has a side portion 74a bent at a substantially right angle downward at the entire periphery, and the tip end portion of the side portion 74a is bent at a substantially right angle inside, such as rainwater. Is surely prevented.

  Further, the side plate 76 is provided so as to sandwich the connecting portion 70 from both sides in the width direction at the lower portion of the upper lid 74, and has a configuration without a protruding portion outward from the outer surface of the bus duct bent at a right angle. In addition, the lower end portion of the side plate 76 is similarly provided with bent portions 76-1a and 76-2a that are bent at a substantially right angle inside the lower end portion.

  At the bottom, a lower lid 78 bent horizontally at a right angle like the upper lid 74 covers the bent portions 76-1a and 76-2a of the side plate 76 from below, and covers the open portion on the lower surface side of the connecting portion. Installed. Bending portions 78a that rise upward in the installed state are provided at both ends of the lower lid 78 to prevent intrusion of rainwater from both ends. In the installed state, the bent portion 78a may be located inside the position of the fastening portion (bolt 18 or the like) closest to the connecting portion of the bus duct 10, that is, closer to the connecting portion as shown in FIGS. The configuration is the same. As a result, even if rainwater that has entered the housing of the bus duct is discharged from the through portion through which the fastening means passes, it does not enter the waterproof structure portion again.

  Next, in the vertically bent configuration of FIG. 8, the upper lid 84 has a rectangular planar shape on the upper surface, and also has a side portion 84 a bent substantially at a right angle downward on the entire periphery thereof. The side plate 86 is a pair of (two) bent side plates 86-1 that are arranged at right angles so as to cover the side surfaces of the bent portion, and one outer plate 86-2 that is installed outside the bent portion. And one inner plate 86-3. Each side plate 86-1, 86-2, 86-3 is provided with bent portions 86-1a, 86-1b, 86-2a, 86-3a on the sides thereof, and rainwater from the side portions is provided. It is configured to prevent intrusion. Further, bottom bent portions 86-2b and 86 are provided at the lower end sides of the outer plate 86-2 and the inner plate 86-3 in the installed state in order to prevent rainwater or the like from entering the waterproof structure of the bent portion from below. -3b is provided, and the bending length is longer than the bending portions 86-2a and 86-3a provided on the side.

  The lower lid 88 covers the open part on the lower surface side of the connecting part unit 80-1 in the horizontal part immediately before reaching the bent part, and is respectively provided on the side edge extending horizontally and the side edge hanging down. Bending portions 88a and 88b rising upward in the installed state are formed.

  Each member is installed by placing an upper lid 84 on the uppermost portion so as to cover the upper region of the connection unit 80-1 and 80-2 existing at the bent portion, and contacting the upper housing half 14 of the side portion 84a. The tip that is installed in contact with each other is further bent inward at a substantially right angle to reliably prevent intrusion of rainwater and the like.

  Further, each of the side plates 86-1, 86-2, 86-3 is provided so as to sandwich the bent portion from the four sides at the lower portion of the upper lid 84 so that the upper end portion is accommodated in the upper lid 84, and the connecting portion 80 bent at a right angle. The bus duct has an external protrusion from the outer surface of the bus duct.

  A lower lid 88 having the structure shown in FIG. 9 is installed on the bottom surface side of the horizontal portion of the bus duct immediately before the bent portion is suspended. One bent portion 88a is arranged at a position closer to the connecting portion 80 than the position of the fastening means (bolt 18 or the like) as in the above-described embodiment. Even when rainwater enters and the rainwater is discharged from the penetrating portion through which the fastening means passes, it is prevented from entering the waterproof structure portion again. Further, the other bent portion 88b is placed in contact with the upper end of the installed state of the inner plate 86-3 so as to have a height so as to reliably prevent rainwater from entering from the horizontal side to the drooping side.

  Furthermore, as shown in the figure, notches 88c are provided at both ends of the bent portion of the bent portion 88b on the drooping side so that rainwater can be discharged. Can be drained. In particular, since the notches 88c are provided at both ends, water can be drained without accumulating even if there is a gradient in either direction.

  Next, FIG. 10 shows another example of the structure for fixing the lower housing half 12 and the upper housing half 14. FIG. 4A is different from the configuration shown in FIG. 1 in regard to the receiving structure of the head portion of the bolt 18 which is a fastening means in the upper flat plate portion 14a of the upper housing half 14, and is a portion of the through portion of the upper flat plate portion 14a. The bulging portion 102 is provided in the bulging portion 102, and the waterproof seal material 104 is interposed between the bulging portion 102 and the bolt head 18a. In this way, by bulging the part through which the bolt 18 penetrates, rainwater can flow to the other part of the upper flat plate part 14a and can be prevented from collecting in the vicinity of the penetration part. It should be noted that it is preferable that a similar bulging portion 106 is provided in the through portion of the lower housing half 12. As a result, even if rainwater enters the housing through the through portion of the upper housing half 14, the rainwater is guided to the bulging portion 106 and can be discharged outside through the through portion.

  In FIG. 5B, the joint bent portion 14a and the support flat plate portion 12a are not penetrated and fastened through the upper flat plate portion 14a of the upper housing half body 14 and the support flat plate portion 12a of the lower housing half body 12. The example fixed in the part is shown. As shown in the drawing, a through-hole penetrating the joint bending portion 14a and the support flat plate portion 12a is provided, and a blind rivet 108 that can be mounted from one side is used in that portion, and the waterproof packing 26 is interposed for fixing. Yes. As described above, in the present embodiment, the operation of the fastening means does not support the load of the insulation-coated conductor 16, but sandwiches them and positions the upper housing half 14 and the lower housing half 12. Therefore, sufficient strength can be obtained by fixing at the joint bent portion 14c by the rivet.

  Moreover, according to this structure, since the through-hole 14d is not provided in the upper flat plate part 14a of the upper housing half body 14, waterproofness becomes higher. Further, since there is no protruding portion on the upper surface of the upper flat plate portion 14a, it is possible to prevent a tripping or the like when walking on the bus duct as necessary, and to improve the safety of work.

  FIG. 11 shows examples in which the length relationship in the bus duct width direction of the upper housing half 14 and the lower housing half 12 is variously modified. In FIG. 2A, the upper housing half 14 and the lower housing half 12 are formed in the same size and shape. Thereby, the manufacture can be facilitated by sharing the members.

  Further, in FIG. 11B, the joining bent portion 14c of the upper housing half 14 is further extended, and an upright portion 14e that is raised substantially at a right angle is provided. The upper end of the standing portion 14e extends to a position in contact with or close to the back surface of the upper flat plate portion 12a. As a result, the strength on the housing side when tightening and fixing by the fastening means (bolt 18 or the like) can be increased.

  FIG. 11C shows a configuration in which the outer side surfaces of the side cover portion 14b of the upper housing half 14 and the support leg portion 12b of the lower housing half 12 are not flush with each other. That is, in this example, the upper flat plate portion 12 a of the upper housing half body 14 is set to have a shorter length in the width direction than the support flat plate portion 12 a of the lower housing half body 12. Further, as shown in FIG. 12A, the upper flat plate portion 4a can be set to have a longer length in the width direction than the support flat plate portion 12a. In addition, the size of this size can be shifted as described above, with only the side cover 14b and the support leg 12b on one side being flush with each other. In this way, the lengths in the width direction of the upper housing half 14 and the lower housing half 12 can be set so as to be flexible.

  Next, FIG. 12B shows an example in which the bolt 18 as a fastening means is also passed through the joint bent portion 14 c of the upper housing half 14. With this configuration, stabilization of the fixed state of the upper housing half 14 and the lower housing half 12 can be improved.

  Next, FIG. 13 shows an example in which the configuration of the end plate portion provided at the end near the connection portion of the bus duct 10 is different from the configuration shown in FIGS. Show. That is, instead of continuously extending from the end portion of the upper housing half body 14, the end plate portion 35 is configured and attached as a separate body from the upper housing half body 14. Further, in this example, a rising portion 35a that rises substantially perpendicularly from the state along the upper surface of the upper flat plate portion 14a is provided at the end of the end plate portion 35 on the bus duct side. Thereby, it is possible to effectively prevent water from entering the connecting portion from the upper flat plate portion 14a side. The end plate portion 35 is a portion along the upper surface of the upper flat plate portion 14a at the end portion on the bus duct side, and is fastened and fixed by the fastening means 18 and 20.

  In addition, a rising portion 14f that is bent upward is provided at the end of the upper housing half 14 to more effectively prevent water from entering the connecting portion. Further, a waterproof packing may be provided between the upper surface of the upper flat plate portion 14a and the lower surface of the end plate portion 35, and the waterproof effect can be further enhanced.

  As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to said embodiment, A various deformation | transformation is possible within the range of the summary of invention. For example, although the case where the upper and lower housing halves 14 and 12 are formed by bending a plate member is not limited to this, it may be formed by extrusion. In addition, the example in which the upper and lower housing halves 14 and 12 are formed by bending a steel plate previously coated has been described. However, after the upper and lower housing halves 14 and 12 are processed, coating (rust prevention treatment) is performed. Also good. In this case, it is preferable to coat the cut surface at the same time.

  Further, when the cut surfaces of the upper housing half 14 and the lower housing half 12 (end surfaces of the joint bent portion 14c and the installation bent portion 12c) are not painted, a separate coating (rust prevention treatment) is applied to the cut surfaces. It is preferable to apply. In addition, when the joint bending part 14c and the installation bending part 12c are bent inside, since those end surfaces are accommodated in the housing, they are not exposed to wind and rain, and it is not necessary to repaint the cut surface. Since it does not rust, painting can be omitted.

  For convenience of bus duct installation work, an operator or the like may walk on the bus duct main line. In the above embodiments, both ends of the upper housing half 14 and the lower housing half 12 are folded into a U-shape. Therefore, the maintenance strength of the upright state is increased as compared with the case where it is simply bent into an L-shape. Even if a member such as a reinforcing member is not provided separately, the bus duct is bent and deformed, or the housing is crushed. Is effectively prevented.

  Moreover, although the case where the connection method in a connection part is a butt | matching method was demonstrated, it is not restricted to this, The superposition method which piles up the conductor end part of bus ducts and may be fastened collectively may be sufficient. In addition, although the insulation contact type bus duct has been illustrated, the present invention is not limited to this, and the present invention can be applied to an air insulation type bus duct in which a bare conductor is supported by an insulator or the like and air is insulated.

It is a structure explanatory view showing the composition of the bus duct concerning an embodiment of the invention. It is a decomposition explanatory drawing of the component of the bus duct concerning the embodiment shown in FIG. (A) And (B) is an external view of 1 unit of the bus duct which concerns on embodiment, (A) is explanatory drawing seen from the upper direction in an installation state, (B) is seen from the side. It is installation state explanatory drawing which shows the state by which the bus duct which concerns on embodiment was mounted and installed on the bus duct support stand. It is explanatory drawing which shows embodiment of the waterproof structure of the connection part when the bus duct shown in FIG. 4 is installed on a bus duct support stand. (A) And (B) is a decomposition | disassembly explanatory drawing of the component of the connection part waterproof structure shown in FIG. It is explanatory drawing which shows embodiment of the waterproof structure in the part in which the bus duct bent substantially at right angles to the horizontal direction. It is explanatory drawing which shows embodiment of the waterproof structure in the curved part where a bus duct hangs down from a horizontal direction. It is a perspective view which shows the structure of the lower cover which concerns on embodiment of FIG. (A) And (B) is explanatory drawing which shows other embodiment of the fixation structure of an upper housing half body and a lower housing half body. (A), (B), and (C) are explanatory drawings which show the modification of an upper housing half body and a lower housing half body, and a structure. (A) And (B) is explanatory drawing which shows the further another modification of a structure with an upper housing half body and a lower housing half body. It is explanatory drawing which shows the other modification of the edge part structure of a bus duct.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Bus duct 12 Lower housing half body 12a Upper flat plate part 12b Side surface cover part 12c Joint bending part 12d Through-hole 14 Upper housing half body 14a Support flat plate part 14b Support leg part 14c Installation bending part 14d Through hole 18 Bolt 52 as fastening means , 74, 84 Upper lid 54, 76, 86 Side plate 58, 78, 88 Lower lid

Claims (10)

In a bus duct in which a plurality of conductors are housed in two housing halves to be joined and fixed,
One of the two housing halves is:
It is configured as a lower housing half having a support flat plate portion that supports the conductor from below, and a support leg portion that extends downward at a substantially right angle from the long side portion of the support flat plate portion and has a bent tip portion.
The other of the two housing halves is:
An upper flat plate portion covering the upper surface side of the conductor, and extending downward at a substantially right angle from the long side portion of the upper flat plate portion, the tip portion is bent and joined to the outer surface of the support flat plate portion of the one housing half. A bus duct, characterized in that it is configured as an upper housing half having a side cover portion.   The support leg portion of the lower housing half and the side cover portion of the upper housing half are formed so that the outer surfaces thereof are flush with each other in the installed state. The described bus duct.   3. The bus duct according to claim 1, wherein the lower housing half and the upper housing half are formed by bending a plate material having a common size in the width direction. 4. .   The bus duct according to any one of claims 1 to 3, wherein the lower housing half and the upper housing half are subjected to rust prevention treatment on surfaces including their end faces.   The two housing halves are joined with a waterproof means interposed between the support flat plate portion of the lower housing half and the tip of the side cover portion of the upper housing half. The bus duct according to any one of claims 1 to 4.   The tip of the support leg of the lower housing half and the tip of the side cover of the upper housing half are bent substantially perpendicularly to the inside in the bus duct width direction. The bus duct according to any one of 5. The fixing of the lower housing half and the upper housing half is
It is performed by fastening means penetrating the support flat plate portion of the lower housing half and the upper flat plate portion of the upper housing half, and is curved at least between the fastening means and the outer surface of the upper flat plate portion. The bus duct according to any one of claims 1 to 6, wherein the bus duct is performed by interposing a dish washer and a waterproof sealing material. The fixing of the lower housing half and the upper housing half is
7. A fastening means for riveting and fixing a support flat plate portion of the lower housing half and a bent tip portion of a side cover portion of the upper housing half. The bus duct according to any one of the above. A bus duct connecting part waterproof structure that covers the connecting part of the bus duct main line configured by connecting and connecting a plurality of bus ducts according to any one of claims 1 to 8 at a connecting part,
The waterproof cover is
An upper lid having an upper surface portion covering the connection portion, a side wall portion hanging from an edge portion of the upper surface portion in a state of being placed over the connection portion, and a supporting leg portion and a side cover portion of the housing half body A side plate installed so as to cover at least a part of the outer side and a side surface of the connection part,
A lower lid that closes the lower surface side of the connecting portion,
The side plate is installed so that an upper end portion is accommodated inside a side wall portion of the upper lid and a lower end portion is covered with the lower lid.   The position of the fastening means according to claim 7 or 8, wherein the lower lid has a bent portion extending upward at an edge portion in the installed state, and an upper end portion of the bent portion is present in the vicinity of the connection portion. The structure for waterproofing a connecting portion of a bus duct according to claim 9, wherein the waterproof structure is arranged closer to the connecting portion.

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