KR101130714B1 - Bus duct - Google Patents

Abstract

The present invention relates to a booth duct that can be installed on the ceiling of a shopping mall, a parking lot of a large building, a subway passage, a machine room, and the like, to easily install a lighting lamp.

형상의 부스바(40)가 삽입되고, 수직부(10)의 외벽(12) 중간에 클램프 장착홈(13)이 형성되고, 수직부(10)의 내벽(11) 중간에 슬라이드 홈(14)이 형성되고, 상기 수직부(10)의 하단에 커버 장착부(15)가 형성되는 것을 특징으로 한다.Booth duct according to the present invention is formed in a "┏┓" shape by a plastic extrusion method, the vertical portion 10 and the horizontal portion 30 by the plurality of fat space (S), respectively, the inner wall (11; 31) And outer walls 12 and 31, and a plurality of mounting grooves 35 are formed in the longitudinal direction on the inner side of the horizontal portion 30, and in the mounting grooves 35.

Shaped busbar 40 is inserted, a clamp mounting groove 13 is formed in the middle of the outer wall 12 of the vertical portion 10, the slide groove 14 in the middle of the inner wall 11 of the vertical portion 10. It is formed, characterized in that the cover mounting portion 15 is formed on the lower end of the vertical portion (10).

Description

Booth Duct {BUS DUCT}

The present invention relates to a booth duct that can be installed on the ceiling of a shopping mall, a parking lot of a large building, a subway passage, a machine room, and the like, to easily install a lighting lamp.

Republic of Korea Patent No. 10-0920509 (registered September 29, 2009) "raceway lighting fixtures and its installation method" is introduced.

The raceway luminaire is fixed by a hanger coupled with an anchor bolt fixed vertically downward to the ceiling and is sequentially connected to a luminaire that exerts illumination through a lamp associated with a ballast controlling the external power applied to the lower part. In the combined raceway lighting fixture, both sides of the upper surface is extended in the horizontal direction so as to be fixed by the hanger to form a mounting jaw bent vertically downward so that the engaging jaw formed on both sides of the hanger can be coupled to the locking structure, and the opening On both sides of the lower partition wall, the duct case is formed to bend outwardly curved, and the upper opening is opened to be detachably attached to the lower part of the duct case, and the inner jaw of the partition formed upward on both sides flexibly accommodates the bent jaw. Formed inside by fixing with duct case by attaching detachably Kindle storage space is mounted to the ballast and the associated lamp is mounted in the lower direction, and the lower surface of the partition wall formed a recess in the longitudinal direction, and formed in the upper end to be removable on both sides of the lower of the light case A lampshade that symmetrically couples the fitting protrusions to the indentation grooves of the lamp case and expands and reflects the light irradiated from the lamp, and the booth casing is detachably coupled to an upper portion of the storage space of the duct case, and has a plurality having the same length as the duct case. The booths are horizontally arranged inside the booth casing, and then the power supply member vertically fastened to the branch connector coupled to the booth casing is selectively contacted among the plurality of booths to be supplied from the wire branched from the ballast and the switch. It is composed of power input means for supplying power to booth side. A.

However, the raceway lighting fixture is structurally weak in strength, the busbar is formed in a straight shape is connected to the end of the plug in contact with the busbar, the connection between the plug and the busbar can be broken by an external impact, booth casing And the connection structure of the busbars is not described.

"형상의 부스바가 삽입되어 고정됨으로써, 부스바의 개구부로 전원 플러그를 꽂을 수 있으며, 격막에 의해 부스바가 장착되는 상부 공간부와 안정기가 배치되는 하부 공간부가 구분되는 부스덕트를 제공하는 것이다.Therefore, an object of the present invention can be produced inexpensively by the extrusion molding method, and composed of the inner wall and the outer wall by a plurality of weight loss space portion, light and high strength is not easily damaged by external impact, inside the upper surface A plurality of open grooves are formed in the longitudinal direction, the opening grooves are "

By inserting and fixing the shape of the busbar, it is possible to insert a power plug into the opening of the busbar, and to provide a bus duct that distinguishes the upper space in which the busbar is mounted and the lower space in which the ballast is arranged by the diaphragm.

Another object of the present invention is to provide a bus duct that can easily connect the duct case and the bus bar in a straight line, diagonal line, and right angle.

형상의 부스바가 삽입되고, 수직부의 외벽 중간에 클램프 장착홈이 형성되고, 수직부의 내벽 중간에 슬라이드 홈이 형성되고, 상기 수직부의 하단에 커버 장착부가 형성되는 것을 특징으로 한다.Booth duct according to the present invention for achieving the above object is formed in a "┏┓" shape by a plastic extrusion molding method, the vertical portion and the horizontal portion is composed of the inner wall and the outer wall, respectively by a plurality of weight space, the inner side of the horizontal portion A plurality of mounting grooves are formed in the longitudinal direction in the mounting grooves

Shaped busbar is inserted, the clamp mounting groove is formed in the middle of the outer wall of the vertical portion, the slide groove is formed in the middle of the inner wall of the vertical portion, characterized in that the cover mounting portion is formed at the lower end of the vertical portion.

A clamp of the hanger means fixed to the ceiling is mounted to the clamp mounting groove, and the diaphragm is fixed to the slide groove in a sliding manner, thereby distinguishing the upper chamber in which the busbar is arranged by the diaphragm and the lower chamber in which the ballast of the lighting device is disposed. The locking protrusions are coupled to the locking protrusions formed at both side ends of the lower cover, and the lighting device is mounted on the lower cover, and the ballast of the lighting device is disposed in the lower chamber.

Half of the straight flat iron clamp is inserted into the clamp mounting groove formed in the first bus duct, and a fastening means such as a screw is fastened to the first bus duct through the first hole of the straight flat iron clamp, and the other half of the straight flat iron clamp is The first bus duct and the second bus duct are inserted into the clamp mounting groove of the second bus duct adjacent to the first bus duct, and the fastening means such as a screw is fastened to the second bus duct through the second hole of the straight flat iron clamp. Is connected to the date, and the busbar of the first bus duct and the busbar of the second bus duct are connected by a first coupling conductor having a "┏┓" shape.

The straight flat iron clamp has a width that increases from an end portion to a center portion, and a first hole and a second hole are formed at both ends, respectively.

The first connecting conductor is made of a material such as a bus bar, and connecting members each having a connecting protrusion formed at both ends of one surface of a flat iron portion are formed, and the width portions of the connecting members are arranged side by side in a line. .

When the first bus duct and the third bus duct are connected in a "ㅗ" shape, an incision is formed in a vertical portion of the third bus duct, and an end of the first bus duct coincides at right angles with the cut in the third bus duct. The bus bar of the first bus duct and the bus bar of the third bus duct are connected by a plurality of second connection conductors.

The second connecting conductor is made of a material such as a bus bar, and each of the connecting members having connection protrusions is formed at both ends of one surface of the flat iron portion, and the width portion of the connecting member is arranged at right angles.

The second connecting conductor is inserted into the insert in the plastic injection molding method, characterized in that three (or two) can be used as one connector.

The fourth bus duct with the end of the first bus duct partially cut off is connected in a "b" shape, and the connecting protrusion formed on the horizontal part of the third connecting conductor is fitted to the bus bar of the first bus duct, The connecting protrusion is formed at the vertical portion refracted at right angles at one end, and the connecting protrusion formed at the vertical portion of the third connecting conductor is fitted to the busbar of the fourth bus duct, thereby preventing the first bus duct from being connected to the first bus duct. The busbars and the busbars of the fourth bus duct are connected at right angles.

The fifth bus duct is inclined downward with respect to the first bus duct, and the connecting protrusion formed in the horizontal portion of the fourth connecting conductor is fitted into the bus bar of the first bus duct, and the inclination is inclined downward from one end of the horizontal portion. The connecting protrusion is formed in the portion, and the connecting protrusion formed on the inclined portion of the fourth connecting conductor is fitted into the busbar of the fifth bus duct, so that the fourth connecting conductor is used to connect the bus bar of the first bus duct and the fifth bus duct. Bus bar is characterized in that the inclined connection.

The sixth bus duct is inclined upwardly with respect to the first bus duct, and the connecting protrusion formed in the horizontal portion of the fifth connecting conductor is fitted to the bus bar of the first bus duct, and is deflected obliquely upward from one end of the horizontal portion. The connecting protrusion is formed in the inclined portion, and the connecting protrusion formed in the inclined portion of the fourth connecting conductor is fitted into the busbar of the sixth bus duct, so that the bus bar and the sixth bus duct of the first bus duct are connected by the fifth connecting conductor. The busbar is characterized in that the inclined connection.

As a result, the duct according to the present invention is structurally strong against external shock, and can provide distinction between the weak signal for power and the strong power for power, and the plug of the electric device is reliably connected to the busbar, and the plug of the lighting device by the external shock. The connection between the busbars and the busbars is not broken, and the busbars can be connected to the straight, tee type, tracer type, or obliquely.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

형상의 부스바(40)가 삽입되고, 수직부(10)의 외벽(12) 중간에 클램프 장착홈(13)이 형성되고, 수직부(10)의 내벽(11) 중간에 슬라이드 홈(14)이 형성되고, 상기 수직부(10)의 하단에 커버 장착부(15)가 형성된다.1 and 2, the booth duct 1 according to the present invention is formed in a "┏┓" shape by a plastic extrusion method, it is horizontal to the vertical portion 10 by a plurality of fat space (S) The part 30 is composed of inner walls 11 and 31 and outer walls 12 and 31, respectively, and a plurality of mounting grooves 35 are formed in a length direction inside the horizontal part 30, and the mounting grooves 35 are formed. ) On

Shaped busbar 40 is inserted, a clamp mounting groove 13 is formed in the middle of the outer wall 12 of the vertical portion 10, the slide groove 14 in the middle of the inner wall 11 of the vertical portion 10. Is formed, the cover mounting portion 15 is formed at the lower end of the vertical portion (10).

In FIG. 2, seven busbars 40 are illustrated. In the case of seven busbars 40, three of the busbars 40 are used for power (for power), and the remaining four are for weak (for signal). Used. Although not shown in the figure, if there are five busbars, three are used for power (power supply), the remaining two are used for medicine (signal), and if three busbars are used, all three are used for power. Two can be used for medicine.

형상으로 형성되어 있어, 조명장치 등과 같은 전기장치의 플러그를 부스바(40)에 꽂는 간단한 방식으로 부스바에서 전기장치로 전원을 공급할 있고(또한 신호선을 연결할 수 있다), 전기장치의 플러그가 부스바에 확실하게 접속되고, 외부 충격에 의해 부스바와 플러그의 전기적 접촉이 끊어지는 것을 방지할 수 있다.As such, the booth duct 1 according to the present invention is not only high in productivity but also low in production cost because it is molded by a plastic extrusion method, and the vertical portion 10 and the horizontal portion are formed by a plurality of fat spaces S. 30 is composed of the inner wall (11; 31) and the outer wall (12; 32), respectively, light and elastic, strong against external impact, and the bus bar 40 can be divided into strong and weak for use, Busbar 40

It is formed in a shape so that power can be supplied from the busbar to the electric device (also can be connected to a signal line) by simply plugging an electric device such as a lighting device into the busbar 40, and a plug of the electric device is installed in the booth. It is reliably connected to the bar, and it is possible to prevent the electrical contact between the busbar and the plug is broken by external impact.

3 and 4, the booth duct 1 according to the present invention is also equipped with a clamp 81 of the hanger means 80 fixed to the ceiling in the clamp mounting groove 13, the slide groove As the diaphragm 50 is fixed to the 14 by the sliding method, the upper chamber 52 in which the busbars 40 are arranged by the diaphragm 50 and the lower chamber in which the ballast 71 of the lighting device 70 are disposed are arranged. (54) are divided, the locking projections (16) formed on both side ends of the lower cover (60) are locked to the locking portion (16) of the cover mounting portion (15), and the lighting device (70) on the lower cover (60). ), The ballast 71 of the lighting device 70 is disposed in the lower chamber (54).

As a result, the booth duct 1 according to the present invention is suspended on the hanger means 80, and as shown in FIG. 5, the diaphragm 50 is slidably mounted to the slide groove 14, while the lower cover is provided. After attaching the lighting device 70 to the 60, the locking projection 61 of the lower cover 60 is locked by locking the locking portion 16 of the cover mounting portion 15 in the direction of the arrow 75. . 3, the lower finishing covers 91 and 92 are mounted to the cover mounting part 15 in a sliding manner to finish the treatment.

As such, the booth duct according to the present invention has an advantage that the lighting device can be mounted firmly and conveniently at a desired position.

In addition, a configuration for connecting the bus duct according to the present invention as described above will be described with reference to FIGS.

6 and 7, the bus duct 1 according to the present invention is connected to the first bus duct 1a when the two bus ducts 1a and 1b are connected to each other as illustrated in FIG. 6. Half of the straight flat iron clamp 110 is inserted into the formed clamp mounting groove 13a, and a fastening means 120 such as a screw is provided through the first hole 111 (see FIG. 8) of the straight flat iron clamp 110. Fastened to one bus duct 1a, the other half of the straight flat iron clamp 120 is fitted into the clamp mounting groove 13b of the second bus duct 1b adjacent to the first bus duct 1a, and straight flat iron. The fastening means 125 such as a screw is fastened to the second bus duct 1b through the second hole 112 of the clamp 110, so that the first bus duct 1a and the second bus duct 1b are straight. The bus bar 40a of the first bus duct 1a and the bus bar 40b of the second bus duct 1b are connected by the first connecting conductor 130 having a “┏┓” shape.

Referring to FIG. 8, the flat wedge clamp 110 has a width W1 increasing from an end portion to a center thereof, and a first hole 111 and a second hole 112 are formed at both ends, respectively.

As a result, when the straight flat iron clamp 110 is inserted into the clamp mounting grooves 13a and 13b of the first and second bus ducts 1a and 1b, the end of the flat straight iron clamp 110 is clamped to the bus duct. Although it fits well into the groove, the width W1 of the flat iron clamp 110 increases toward the center, and the flat mounting iron clamp 110 of the clamp mounting grooves 13a and 13b of the first and second bus ducts 1a and 1b is increased. ) Is caught in the center.

Referring to FIG. 6 again, the first connection conductor 130 is made of a material such as a bus bar, and a connection member 132 having connection protrusions 133 and 136 formed at both ends of one surface of the flat iron portion 131. And 135 are respectively formed, and the width portions 134 and 137 of the connection members 132 and 135 are arranged side by side.

As a result, the connecting projection 132 is fitted to the busbar 40a of the first bus duct 1a, and the connecting projection 135 is fitted to the busbar 40b of the second bus duct 1b. .

9 and 10, the bus duct according to the present invention is a vertical portion of the third bus duct 1c when the first bus duct 1a and the third bus duct 1c are connected in a “ㅗ” shape. An incision 150 is formed in 10c, an end portion of the first bus duct 1a coincides at right angles to the incision 150 of the third bus duct 1c, and the first bus duct 1c. The bus bar 40a of) and the bus bar 40c of the third bus duct 1c are connected by a plurality of second connection conductors 160. The clamp mounting groove 13a formed in the first bus duct 1a and the clamp mounting groove 13c of the third bus duct are mounted with a bracket (not shown) and the hole of the bracket is mounted. Fastening means such as screws are fastened to the first bus duct and the third bus duct.

Referring to FIG. 9, the second connection conductor 160 is made of a material such as a bus bar, and connection members 162 having connection protrusions 163 and 166 formed at both ends of one surface of the flat iron portion 161. 165 are formed, respectively, and the width portions 164 and 167 of the connection members 162 and 165 are arranged at right angles.

The flat iron portion 161 is formed so that its length corresponds to the distance between the busbars to be connected.

As a result, the connecting member 162 is fitted to the bus bar 40a of the first bus duct 1a, and the connecting member 165 is fitted to the bus bar 40c of the third bus duct 1c.

The second connecting conductor 160 is inserted into the insert in the plastic injection molding method, so that three (or two) may be used as one connector as shown in FIG. 11.

12 and 13, in the bus duct according to the present invention, an end portion of the first bus duct 1a and a fourth bus duct 1d partially cut off are connected to each other in a shape of “a”, and a third connection is performed. The connecting protrusion 172 formed on the horizontal portion 171 of the conductor 170 is fitted to the bus bar 40a of the first bus duct 1a, and the vertical portion is refracted at right angles at one end of the horizontal portion 171. A connecting protrusion 174 is formed at 173, and the connecting protrusion 174 formed at the vertical portion 173 of the third connecting conductor 170 is fitted to the busbar 40d of the fourth bus duct 1d. As a result, the bus bar 40a of the first bus duct 1a and the bus bar 40d of the fourth bus duct 1d are connected at right angles by the third connecting conductor 170.

Referring to FIGS. 14 and 15, the bus duct according to the present invention may be connected in a state in which two bus ducts are bent at a predetermined angle, and in this case, a bus bar is connected by using a connection conductor having an intermediate portion of the flat iron part refracted. Can be.

That is, as shown in Figure 14, the fifth bus duct (1e) is inclined downward with respect to the first bus duct (1a), the connecting projection formed in the horizontal portion 181 of the fourth connecting conductor 180 182 is fitted to the busbar 40a of the first bus duct 1a, and a connection protrusion 184 is formed on the inclined portion 183 bent obliquely downward from one end of the horizontal portion 181, The connecting protrusion 184 formed on the inclined portion 173 of the fourth connecting conductor 180 is fitted into the bus bar of the fifth bus duct 1e, whereby the first bus duct ( The busbar 40a of 1a and the busbar of the 5th bus duct 1d are inclinedly connected.

In addition, as illustrated in FIG. 15, the sixth bus duct 1f is disposed to be inclined upward with respect to the first bus duct 1a and the connection protrusion formed in the horizontal portion 191 of the fifth connection conductor 190. 192 is fitted to the busbar 40a of the first bus duct 1a, and a connection protrusion 194 is formed on the inclined portion 193 bent obliquely upward from one end of the horizontal portion 191, The connecting protrusion 194 formed on the inclined portion 193 of the fifth connecting conductor 190 is fitted into the bus bar 40f of the sixth bus duct 1f, thereby being formed by the fifth connecting conductor 190. The bus bar 40a of the first bus duct 1a and the bus bar 40f of the sixth bus duct 1f are inclinedly connected.

형상으로 형성되어 있어, 연결도체를 이용하여 부스바 및 부스덕트를 일자형, "ㅗ", "ㄱ" 및 경사지게 연결할 수 있으며, 연결이 매우 편리한 장점이 있다. Bus duct according to the present invention as described above is a bus bar

It is formed in the shape, it is possible to connect the busbar and the bus duct to the straight, ",", """and obliquely using the connection conductor, there is an advantage that the connection is very convenient.

1 is a perspective view showing a bus duct according to the present invention

Figure 2 is a cross-sectional view taken along the line A-A of Figure 1 showing a bus duct according to the present invention

Figure 3 is a perspective view showing a state in which the lighting device is mounted on the booth duct according to the present invention

4 is a cross-sectional view taken along line B-B of FIG. 3 showing a state in which a lighting device is mounted on a booth duct according to the present invention.

5 is an exploded cross-sectional view showing an example in which the lower cover is mounted on the booth duct is equipped with a lighting device;

6 is a bottom perspective view illustrating an example in which two bus ducts are connected in a straight line;

FIG. 7 is a bottom view illustrating an example in which two bus ducts are connected by date. FIG.

8 is a perspective view of a straight flat iron clamp;

9 is a bottom perspective view showing an example in which two bus ducts are connected in a "ㅗ" shape;

10 is a bottom view illustrating an example in which two bus ducts are connected in a “ㅗ” shape.

11 is a perspective view showing a second connecting conductor

12 is a bottom perspective view showing an example in which two bus ducts are connected in a "b" shape;

FIG. 13 is a bottom view illustrating an example in which the bus duct of FIG. 12 is connected;

14 and 15 are perspective views illustrating an example in which two bus ducts are connected in a state in which they are refracted at a predetermined angle.

Claims (11)

It is formed in the shape of "형상" by a plastic extrusion method, the vertical portion 10 and the horizontal portion 30 by the plurality of fat spaces (S), respectively, the inner wall (11; 31) and the outer wall (12; 31) Consists of, a plurality of mounting grooves 35 are formed in the longitudinal direction on the inner side of the horizontal portion 30, the mounting groove 35

Shaped busbar 40 is inserted, a clamp mounting groove 13 is formed in the middle of the outer wall 12 of the vertical portion 10, the slide groove 14 in the middle of the inner wall 11 of the vertical portion 10. Is formed, the cover duct is characterized in that the cover mounting portion (15) is formed at the lower end of the vertical portion (10). The method of claim 1, The clamp 81 of the hanger means 80 fixed to the ceiling is mounted to the clamp mounting groove 13, and the diaphragm 50 is fixed to the slide groove 14 in a sliding manner, thereby providing a diaphragm 50. The upper chamber 52 in which the busbar 40 is disposed and the lower chamber 54 in which the ballast 71 of the lighting device 70 is disposed are divided, and the lower cover is provided on the locking part 16 of the cover mounting part 15. Coupling protrusions 61 formed at both side ends of the 60 are locked, and the lighting device 70 is mounted on the lower cover 60, so that the ballast 71 of the lighting device 70 is lower chamber 54. Booth duct characterized in that disposed in. The method of claim 1, Half of the straight flat iron clamp 110 is inserted into the clamp mounting groove 13a formed in the first bus duct 1a, and the fastening means 120 is formed through the first hole 111 of the straight flat iron clamp 110. Fastened to one bus duct 1a, the other half of the straight flat iron clamp 120 is fitted into the clamp mounting groove 13b of the second bus duct 1b adjacent to the first bus duct 1a, and straight flat iron. As the fastening means 125 is fastened to the second bus duct 1b through the second hole 112 of the clamp 110, the first bus duct 1a and the second bus duct 1b are connected to each other. , The bus bar 40a of the first bus duct 1a and the bus bar 40b of the second bus duct 1b are connected by a first connecting conductor 130 having a “┏┓” shape. Booth duct. The method of claim 3, wherein The straight flat iron clamp 110 has a width (W1) becomes larger from the end toward the center, booth duct, characterized in that the first hole (111) and the second hole (112) are formed at both ends, respectively. The method of claim 3, wherein The first connecting conductor 130 is made of a material such as a bus bar, and connecting members 132 and 135 having connection protrusions 133 and 136 are formed at both ends of one surface of the flat iron portion 131, respectively. Booth duct, characterized in that the width portion (134, 137) of the connecting member (132, 135) are arranged side by side in a row. The method of claim 1, When the first bus duct 1a and the third bus duct 1c are connected in a "ㅗ" shape, a cutout 150 is formed in the vertical portion 10c of the third bus duct 1c, and the third An end portion of the first bus duct 1a coincides at right angles with the cutout 150 of the bus duct 1c, and the bus bar 40a of the first bus duct 1c and the third bus duct 1c Bus duct, characterized in that the bus bar (40c) is connected by a plurality of second connection conductor (160). The method of claim 6, The second connection conductor 160 is made of a material such as a bus bar, and connection members 162 and 165 having connection protrusions 163 and 166 are formed at both ends of either side of the flat iron portion 161, respectively. Booth duct, characterized in that the width portion (164, 167) of the connecting member (162, 165) is arranged at a right angle. The method of claim 6, The second connecting conductor 160 is inserted into the insert in the plastic injection molding method, booth duct, characterized in that three (or two) can be used as one connector. The method of claim 1, The connection part 172 formed in the horizontal part 171 of the third connection conductor 170 is connected to the fourth bus duct 1d having the end of the first bus duct 1a partially cut off in the form of "a". ) Is fitted to the bus bar 40a of the first bus duct 1a, and a connecting protrusion 174 is formed on the vertical part 173 that is refracted at right angles at one end of the horizontal part 171, so that the third The connecting protrusion 174 formed in the vertical portion 173 of the connecting conductor 170 is fitted into the bus bar 40d of the fourth bus duct 1d, whereby the first bus duct is connected by the third connecting conductor 170. A bus duct, characterized in that the bus bar 40a of (1a) and the bus bar 40d of the fourth bus duct (1d) are connected at a right angle. The method of claim 1, The fifth bus duct 1e is inclined downward with respect to the first bus duct 1a, and the connecting protrusion 182 formed in the horizontal portion 181 of the fourth connecting conductor 180 is the first bus duct 1a. The connecting protrusion 184 is formed on the inclined portion 183, which is fitted to the bus bar 40a of the bottom surface and is inclined downward from one end of the horizontal portion 181, thereby inclining the fourth connecting conductor 180. The connecting projection 184 formed in the portion 173 is fitted to the busbar of the fifth bus duct 1e, whereby the bus bar 40a and the first bus duct 1a are formed by the fourth connecting conductor 180. 5 Booth duct booth duct (1d), characterized in that the busbar is connected obliquely. The method of claim 1, The sixth bus duct 1f is inclined upwardly with respect to the first bus duct 1a, and the connecting protrusion 192 formed in the horizontal portion 191 of the fifth connection conductor 190 is the first bus duct 1a. A connection protrusion 194 is formed on the inclined portion 193 which is fitted to the bus bar 40a of the bottom surface and is inclined upwardly from one end of the horizontal portion 191 to incline the fifth connecting conductor 190. The connecting protrusion 194 formed in the portion 193 is fitted to the bus bar 40f of the sixth bus duct 1f, whereby the bus bar of the first bus duct 1a is connected by the fifth connecting conductor 190. Booth duct characterized in that the bus bar (40f) of the 40a) and the sixth bus duct (1f) is inclined.

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