JP2007200724A - Wiring duct - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiring duct allowing a load operated by A.C. power having a voltage lower than that of commercial A.C. power to be used by directly connecting it in addition to a load operated by the commercial A.C. power without arranging a transformer on the side of a luminaire. <P>SOLUTION: This wiring duct 10 is provided with a rectangular pipe-like duct body 11 with an opening 12 for making the inside and the outside communicate with each other formed on one surface along the longitudinal direction; and, in the duct body 11, a pair of conductive lines 1a and 1b electrically connected to a plug of a load for the commercial A.C. power inserted in the duct body 11 through the opening 12 for supplying the commercial A.C. power to the load for the commercial A.C. power, and conductive lines 2a and 2b electrically connected to a plug of a load for the low-voltage A.C. power inserted in the duct body 11 through the opening 12 for supplying the A.C. power having a voltage lower than that of the commercial A.C. power to the load for the low-voltage A.C. power are arranged along the longitudinal direction of the duct body 11. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wiring duct.

  Conventionally, as shown in FIG. 6, a wiring duct 10 laid on the ceiling or the like and provided with conductive lines 1a and 1b for supplying commercial AC power therein, a plug 20 coupled to the wiring duct 10, and a plug A wiring system is provided that includes a lighting load 30 that is suspended from an arm 20 via an arm 22 and is supplied with commercial AC power from the conductive lines 1a and 1b via the plug 20 (see, for example, Patent Document 1). ).

  The duct body 11 of the wiring duct 10 has an elongated rectangular tube shape, and an opening 12 along the longitudinal direction is provided on the lower surface. Further, on the inner side surfaces of the left and right side pieces 11b, 11b of the wiring duct 10, support projecting pieces 13, 13 project from the middle part in the vertical direction substantially parallel to the central piece 11a. Strip plate-like conductive lines 1 a and 1 b are arranged on the upper side surface of 13.

  On the other hand, the plug 20 is provided with an insertion portion 24 to be inserted into the duct through the opening 12 of the wiring duct 10 on the upper surface of the box-shaped body 21, and the upper end portion of the insertion portion 24 has a rectangular plate-like engagement. The stop piece 25 is provided integrally. The locking piece 25 is formed so that the dimension in the short width direction is smaller than the gap between the support protrusions 13 and 13 and the opening 12, and the dimension in the longitudinal direction is longer than the gap. Current collectors 26a and 26b that are electrically connected to the conductive lines 1a and 1b, respectively, are provided on the lower surfaces of both ends in the longitudinal direction.

  Thus, when the lighting load 30 (plug 20) is attached to the wiring duct 10, the longitudinal direction of the locking piece 25 is substantially parallel to the longitudinal direction of the wiring duct 10 as shown in FIG. The insertion portion 24 is inserted into the duct body 11 through the opening 12. Then, after inserting the insertion portion 24 into the duct body 11 until the upper surface of the body 21 of the plug 20 contacts the peripheral edge of the opening 12, when the plug 20 is rotated about 90 degrees, the longitudinal direction of the locking piece 25 Since both ends overlap with the support protrusions 13 and 13 in the vertical direction, the plug 20 is prevented from dropping, and the current collectors 26a and 26b of the plug 20 are electrically connected to the conductive lines 1a and 1b of the wiring duct 10, respectively. They are connected (see FIG. 7B). At this time, commercial AC power is supplied from the plug 20 to the illumination load 30 via the arm 22, and the light source La provided on the lamp body 31 is turned on.

  On the other hand, when removing the illumination load 30 (plug 20) from the wiring duct 10, when the plug 20 is rotated about 90 degrees from the state shown in FIG. 7B, the current collectors 26a and 26b of the plug 20 are connected to the conductive line 1a. , 1b, and the locking piece 25 of the plug 20 is disposed substantially parallel to the longitudinal direction of the opening 12. If the plug 20 is moved downward in this state, the plug 20 is easily removed from the wiring duct 10. be able to.

In this wiring system, by connecting the plug 20 to a desired position in the longitudinal direction in the wiring duct 10, the lighting load 30 can be suspended to the desired position, and within the range where the wiring duct 10 is laid. Since the mounting position of the illumination load 30 (plug 20) can be moved, for example, it is possible to easily cope with changing the arrangement of exhibits and products in an art museum or a store.
JP 2001-250649 A (paragraph number [0010] and FIGS. 2 and 4)

  By the way, in recent years, lighting fixtures using light-emitting diodes or low-pressure halogen lamps as light sources have been provided, and these lighting fixtures operate with a low-voltage AC power supply (for example, AC12V) compared to a commercial AC power supply. When a lighting fixture using a light emitting diode or a halogen lamp as a light source is connected to the wiring duct 10 described above, it is necessary to provide a transformer for converting the power supply voltage of the commercial AC power source into a low-voltage AC voltage on the lighting fixture side. There was a problem that the lighting equipment was increased in size and cost.

  The present invention has been made in view of the above-described problems, and the object of the present invention is to use a commercial AC power supply in addition to a load that operates with a commercial AC power supply without providing a transformer on the lighting equipment side. Another object of the present invention is to provide a wiring duct that can be used by directly connecting a load that operates with a low-voltage AC power supply.

  In order to achieve the above-mentioned object, the invention of claim 1 is a cylindrical body having a rectangular cross section, and an opening that communicates the inside and the outside is formed on one side along the longitudinal direction. And is electrically connected to a commercial AC power plug inserted into the duct main body through the opening, and supplies the commercial AC power to the load through the commercial AC power plug. 1 is electrically connected to a low-voltage AC power supply plug inserted into the duct body through the conductive line, and the load is connected to the load via a low-voltage AC power supply plug. The second conductive line to be supplied is arranged along the longitudinal direction of the duct body.

  The invention of claim 2 is characterized in that, in the invention of claim 1, the first conductive line is arranged at a position farther from the opening than the second conductive line.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the connecting module for connecting the two adjacent duct bodies is electrically connected between the first conductive lines housed in the duct bodies on both sides. And a voltage conversion unit that steps down the commercial AC power supplied from the conductive member to a low-voltage AC power and supplies the second AC to the second conductive line housed in one duct body. It is characterized by that.

  According to the first aspect of the present invention, the duct body includes the first conductive line for supplying commercial AC power to the load and the second conductive line for supplying low-voltage AC power to the load. Therefore, in addition to a load for a commercial AC power supply, a load for a low-voltage AC power supply can be connected and used, and a low-voltage AC power supply is supplied from the second conductive line to the load. Therefore, it is not necessary to provide a transformer for stepping down the commercial AC power supply to the low-voltage AC power supply in the load for the low-voltage AC power supply, and the load for the low-voltage AC power supply can be reduced in size and cost.

  According to the second aspect of the present invention, since the high-voltage first conductive line is disposed farther from the opening of the plug body than the low-voltage second conductive line, safety is improved. effective.

  According to the invention of claim 3, when the two duct main bodies are connected by the connecting module, the first conductive lines housed in the duct main bodies on both sides are electrically connected via the conductive member of the connecting module. Therefore, commercial AC power can be supplied between the coupled duct bodies through the coupling module. Further, the voltage conversion unit of the connecting module steps down the commercial AC power supplied from the conductive member to a low voltage AC power and supplies it to the second conductive line housed in one duct body. Since the low-voltage AC power is supplied only to the load connected to one duct body, it is connected to the voltage converter compared to the case where the low-voltage AC power is supplied to the loads connected to the plurality of duct bodies. The number of loads can be reduced. Therefore, the current capacity of the voltage conversion unit can be reduced to reduce the size and cost of the voltage conversion unit, and the current flowing through the second conductive line is also reduced. By reducing the cross-sectional area, the storage space can be downsized.

  Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 3, the wiring duct of the present embodiment has a long cylindrical shape with a rectangular cross section, and an opening 12 that communicates the inside and the outside is formed in the longitudinal direction on one side. A pair of first conductive lines (hereinafter abbreviated as conductive lines) 1a and 1b for supplying a commercial AC power source to a load. A pair of second conductive lines (hereinafter abbreviated as conductive lines) 2a and 2b for supplying an AC power supply having a lower voltage than the commercial AC power supply to the load is housed. In the following description, unless otherwise specified, the vertical and horizontal directions are defined in the direction shown in FIG. 1A, and the front of FIG. Accordingly, the right end of FIG.

  As shown in FIGS. 1A and 1B, the duct body 11 of the wiring duct 10 is formed in a U-shaped cross section with side pieces 11b and 11b protruding downward from the left and right side edges of the central piece 11a. Inner flange pieces 11c, 11c are extended from the distal ends of the left and right side pieces 11b, 11b in parallel with the central piece 11a, and the opening 12 is between the distal edges of the inner flange pieces 11c, 11c. The duct body 11 is disposed on the ceiling or the like with the opening 12 facing downward. Further, on the inner side surfaces of the left and right side pieces 11b, 11b, support projecting pieces 13, 13 are provided at a middle portion in the vertical direction substantially parallel to the central piece 11a. Here, the internal space above the support protrusion 13 is a storage space for the conductive lines 1a and 1b for commercial AC power, and the internal space below the support protrusion 13 is for the low-voltage power supply lines 2a and 2b. Storage space. That is, strip plate-like conductive lines 1a and 1b for supplying commercial AC power to the load are arranged on the upper side surfaces of the support protrusions 13 and 13, respectively, and commercial wires are placed on the upper side surfaces of the inner collar pieces 11c and 11c. Strip plate-like conductive lines 2a and 2b for supplying an AC power source having a lower voltage (for example, AC 12V) than the AC power source to the load are arranged.

  The wiring duct 10 of this embodiment includes conductive lines 1a and 1b to which commercial AC power is supplied, and a conductive line 2a to which AC power having a lower voltage (for example, AC 12V) than the commercial AC power is supplied from a low-voltage power supply unit 42 described later. 2b, and a commercial AC power plug 20A shown in FIGS. 2A and 2B and a low voltage power plug 20B shown in FIGS. Power can be supplied to a load for power supply or a load for low-voltage power supply (for example, an LED lighting device).

  As shown in FIGS. 2A and 2B, the plug 20A for commercial AC power is provided with an insertion portion 24 to be inserted into the duct through the opening 12 of the duct body 11 on the upper surface of the box-shaped body 21. A rectangular plate-like locking piece 25 is integrally provided at the upper end portion of the insertion portion 24. The locking piece 25 is formed such that the dimension in the short width direction is smaller than the gap between the support protrusions 13 and 13 and the opening 12 and the dimension in the longitudinal direction is longer than the gap. In addition, current collectors 26a and 26b that are electrically connected to the conductive lines 1a and 1b, respectively, are provided on the lower surfaces of both ends in the longitudinal direction.

  Further, the plug 20B for the low-voltage power supply has substantially the same structure as the plug 20A for the commercial AC power supply described above, and the duct 20B is opened through the opening 12 of the duct body 11 as shown in FIGS. An insertion portion 24 to be inserted inside is provided on the upper surface of the box-shaped body 21, and a rectangular locking piece 25 is integrally provided on the upper end portion of the insertion portion 24. Further, locking pieces 23, 23 inserted between the inner flange piece 11 c and the support protruding piece 13 are provided on the lower side of the locking piece 25 at the intermediate portion in the vertical direction of the insertion portion 24. Each locking piece 23, 23 is formed so that the dimension along the short width direction of the locking piece 25 is smaller than the width dimension of the opening 12, and at the tip of both locking pieces 23, 23. The distance between them is formed to be larger than the width of the opening 12. Further, current collectors 27a and 27b that are electrically connected to the conductive lines 2a and 2b, respectively, are provided on the lower side surfaces of the front ends of the locking pieces 23 and 23, respectively.

  Thus, when attaching the plug 20A for commercial AC power supply to the wiring duct 10 of the present embodiment, the difference between the plugs 20A is made in a state where the longitudinal direction of the locking piece 25 is substantially parallel to the longitudinal direction of the duct body 11. The insertion portion 24 is inserted into the duct body 11 through the opening 12. Then, after inserting the insertion portion 24 into the duct body 11 until the upper surface of the body 21 of the plug 20A comes into contact with the peripheral edge of the opening 12, when the body 21 is rotated about 90 degrees, the longitudinal direction of the locking piece 25 Since both ends overlap with the support protrusions 13 and 13 in the vertical direction, the plug 20A is prevented from dropping, and the current collectors 26a and 26b of the plug 20A are electrically connected to the conductive lines 1a and 1b of the wiring duct 10, respectively. As a result, commercial AC power is supplied from the wiring duct 10 to the illumination load 30 via the plug 20A and the arm 22 (see FIG. 2A). On the other hand, when removing the plug 20A from the wiring duct 10, when the body 21 is rotated about 90 degrees from the attached state shown in FIG. 2A, the current collectors 26a and 26b are dissociated from the conductive lines 1a and 1b. Since the longitudinal direction of the locking piece 25 is substantially parallel to the longitudinal direction of the opening 12 and the locking state between the locking piece 25 and the support protrusions 13 and 13 is released, the insertion portion 24 of the plug 20A is placed on the lower side. It can be easily removed from the wiring duct 10 by moving to.

  Further, when attaching the plug 20B for the low-voltage power source to the wiring duct 10, the plug portion 24B of the plug 20B is inserted in a state in which the alignment direction of the locking pieces 23, 23 is substantially parallel to the longitudinal direction of the duct body 11. It is inserted into the duct body 11 through the opening 12. Then, after inserting the insertion portion 24 into the duct body 11 until the upper surface of the body 21 of the plug 20B comes into contact with the peripheral edge of the opening 12, the body 21 is rotated about 90 degrees, and the longitudinal direction of the locking piece 25 Both ends overlap with the support protrusions 13 and 13 in the vertical direction, and tip portions of the locking pieces 23 and 23 overlap with the inner flange pieces 11c and 11c in the vertical direction, thereby preventing the plug 20B from dropping (see FIG. 3 (a)). At this time, the current collectors 27a and 27b of the plug 20B are electrically connected to the conductive lines 2a and 2b of the wiring duct 10, respectively, so that a low-voltage power source (not shown) is connected from the wiring duct 10 via the plug 20B and the arm 22. A low-voltage AC power supply is supplied to a load (for example, a lighting fixture using a light-emitting diode as a light source or a lighting fixture using a halogen lamp for AC12V as a light source). On the other hand, when removing the plug 20B from the wiring duct 10, when the body 21 is rotated about 90 degrees from the attached state shown in FIG. 3A, the current collectors 27a and 27b are dissociated from the conductive lines 2a and 2b. The arrangement direction of the locking pieces 23 and 23 and the longitudinal direction of the locking piece 25 are substantially parallel to the longitudinal direction of the opening 12, and the locking state between the locking pieces 23 and 23 and the support projecting pieces 13 and 13 is released. Therefore, the plug 20B can be easily removed from the wiring duct 10 by moving the insertion portion 24 of the plug 20B downward.

  As described above, in this embodiment, the conductive lines 1a and 1b for supplying commercial AC power to the load and the conductive lines 2a and 2b for supplying AC power having a lower voltage than the commercial AC power to the load are connected to the wiring duct 10. Therefore, in addition to the load plug 20A that operates with a commercial AC power supply, a load plug 20B that operates with a low-voltage AC power supply can be connected. In addition, since the low-voltage AC power is directly supplied to the low-voltage load via the plug 20B, a low-voltage power supply unit such as a voltage conversion transformer that steps down the commercial AC power is provided in the load connected to the plug 20B. This is unnecessary, and the load can be reduced and the cost can be reduced. In the present embodiment, in the duct body 11, the first conductive lines 1a and 1b are arranged farther from the opening 12 than the second conductive lines 2a and 2b. The safety lines are improved by arranging the conductive lines 1a and 1b on the back side of the low-voltage conductive lines 2a and 2b.

  Further, the longitudinal dimension of the wiring duct 10 of the present embodiment is standardized to a certain length, and a plurality of wiring ducts 10 can be connected to extend the wiring length of the wiring duct 10. Here, when the low-voltage conductive lines 2a and 2b respectively housed in the plurality of wiring ducts 10 are electrically connected, the low-voltage loads (not shown) connected to the plurality of wiring ducts 10 are the same. As a result, the number of loads that can be connected to one low-voltage power supply unit increases. And, if the load that operates with the low-voltage AC power supply has the same power consumption, the current consumption becomes larger than the load that operates with the commercial AC power supply. The current capacity of the power supply must be increased, resulting in an increase in the size and cost of the low-voltage power supply unit. Further, since the value of the current flowing through the conductive lines 2a and 2b increases, the cross-sectional area of the conductive lines 2a and 2b increases, and a large storage space is required to store the conductive lines 2a and 2b.

  Therefore, in the present embodiment, a connecting module 40 as shown in FIGS. 4A and 4B is used to connect the plurality of wiring ducts 10. The connecting module 40 has a cylindrical shape with a rectangular cross section, and the outer dimensions in the vertical direction and the horizontal direction are substantially the same as those of the duct body 11, and the longitudinal direction (front and rear direction) is the same. The outer dimension is formed to be shorter than the duct body 11. In the connection module 40, conductive members 41 that electrically connect the conductive lines 1a and 1a and the conductive lines 1b and 1b respectively housed in the two adjacent wiring ducts 10 and 10, respectively. Is stored. Further, in the connection module 40, either one of a low-voltage power supply unit 42 such as a voltage conversion transformer that steps down the commercial AC power supplied via the conductive member 41 and converts it to a low-voltage AC power ( For example, a conductive line 43 for electrically connecting the low-voltage conductive lines 2a and 2b housed in the wiring duct 10 shown in the right side of FIG. 4B to the output terminal of the low-voltage power supply unit 42 is housed. Yes. Further, appropriate coupling means (not shown) for mechanically coupling with the wiring duct 10 are provided at both ends in the front-rear direction of the coupling module 40. The coupling module 40 is connected to the coupling module 40 using the coupling means. The wiring duct 10 is securely coupled.

  Thus, when a plurality of wiring ducts 10 are connected in a state where the connecting module 40 is interposed between the adjacent wiring ducts 10, the conductive lines 1 a for commercial AC power housed in the respective wiring ducts 10, 1a and the conductive lines 1b and 1b are electrically connected via the conductive member 41 of the connecting module 40, and the low-voltage conductive lines 2a and 2b accommodated in the respective wiring ducts 10 are adjacent to each other. It is electrically connected to the output terminal of the low-voltage power supply unit 32 through the conductive line 43 of the connecting module 40. When commercial AC power is supplied to the conductive member 41 of the connecting module 40 located at the end in the connecting direction or the conductive lines 1a and 1b of the wiring duct 10, the conductive lines 1a of all the connected wiring ducts 10 are supplied. , 1b is supplied with commercial AC power, and commercial AC power is supplied to the load through the plug 20A attached to each wiring duct 10. Further, commercial AC power is supplied to the low-voltage power supply unit 42 accommodated in the connection module 40 via the conductive member 41, and the commercial AC power is converted into a low-voltage AC power supply by the low-voltage power supply unit 42. Since the low-voltage AC power is supplied to the conductive lines 2a and 2b of the wiring duct 10 connected to the wiring duct 10, the low-voltage AC power can be supplied to the load through the plug 20B attached to the wiring duct 10.

  When a plurality of wiring ducts 10 are connected in such a manner that the connecting module 40 is interposed between two adjacent wiring ducts 10, commercial AC power is supplied to the conductive lines 1 a and 1 b of each wiring duct 10. In addition, low-voltage AC power can be supplied to the conductive lines 2a and 2b, and the wiring length of the wiring duct 10 can be extended. In addition, since the low voltage power source 42 provided in the connecting module 40 supplies the low voltage AC power only to the wiring duct 10 directly connected to the connecting module 40, the load connected to the low voltage power source 42 is reduced. Since the number is limited to the number that can be connected to one wiring duct 10, the current capacity of the low-voltage power supply unit 42 can be reduced, and the low-voltage power supply unit 42 can be reduced in size and cost. Further, the current value of the current flowing through the low-voltage conductive lines 2a and 2b provided in the wiring duct 10 is also limited to a predetermined current value or less by limiting the number of loads that can be connected to the low-voltage power supply unit 42. Therefore, the cross-sectional area of the conductive lines 2a and 2b and the storage space thereof can be reduced.

  By the way, in above-mentioned embodiment, the plug 20A for connecting to the conductive lines 1a and 1b for supplying commercial AC power and the plug 20B for connecting to the conductive lines 2a and 2b for supplying low-voltage AC power are separately provided. As shown in FIG. 5, current collectors 26a and 26b for electrically connecting to a commercial AC power source conductive lines 1a and 1b and a low voltage conductive line 2a are connected to one plug 20C as shown in FIG. , 2b are connected to current collectors 27a, 27b, and are supplied via current collectors 26a, 26b in response to a switching operation of a selector switch (not shown) provided on body 21. It may be possible to select whether to supply AC power to the load or to supply low voltage AC power supplied via the current collectors 27a and 27b to the load. And plug for the flow power can be used also a plug for low-voltage AC power source.

The wiring duct of this embodiment is shown, (a) is a front view, (b) is a side view. (A) is an external perspective view of a state in which a plug for commercial AC power is attached to the above wiring duct, and (b) is a front view of the plug for commercial AC power. (A) is an external perspective view of a state where a plug for a low-voltage power supply is attached to the above-described wiring duct, and (b) is a front view of the plug for a low-voltage power supply. (A) is explanatory drawing of the state before connecting a connection block to the same wiring duct, (b) is explanatory drawing of the state which connected the several wiring duct via the connection block. It is a front view of the other plug used for a wiring duct same as the above. It is an external appearance perspective view of the state which connected the plug to the conventional wiring duct. (A) is a front view which shows the state before connecting a plug to a wiring duct, (b) is a front view of the state which connected the plug to the wiring duct.

Explanation of symbols

1a, 1b 1st conductive line 2a, 2b 2nd conductive line 10 Wiring duct 11 Duct body 12 Opening

Claims (3)

  It has a cylindrical shape with a rectangular cross section, and is provided with a duct body having an opening that communicates the inside and the outside along the longitudinal direction on one side, and the duct body passes through the opening inside the duct body. A first conductive line that is electrically connected to a commercial AC power plug inserted therein and supplies commercial AC power to a load via the commercial AC power plug, and the inside of the duct body through the opening A second conductive line that is electrically connected to a plug for a low-voltage AC power supply inserted in the cable and supplies a low-voltage AC power supply to a load via the plug for the low-voltage AC power supply. A wiring duct arranged along the longitudinal direction of the main body.   The wiring duct according to claim 1, wherein the first conductive line is disposed at a position farther from the opening than the second conductive line.   A connection module that connects between two adjacent duct bodies is electrically connected to the first conductive lines housed in the duct bodies on both sides, and supplied from the conductive member 3. The wiring according to claim 1, further comprising: a voltage conversion unit that steps down the commercial AC power source to a low-voltage AC power source and supplies the voltage to the second conductive line housed in one duct body. duct.

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