JP6417151B2 - Conduit connection structure and power distribution device using the same - Google Patents

Description

  The present invention relates to a conduit connection structure, and more particularly to a structure that can be suitably used as a power distribution device for a lighting fixture used in an exterior or garden of a house.

  Electric wires used for power supply to equipment used in exteriors and gardens such as those described above, which are representative of lighting equipment, are wires embedded in the ground or pavement in accordance with variations in equipment installation. The device is connected to a box for power distribution and / or power supply by being passed through a pipe or routed as it is on the ground or a paved road surface.

  The box has a built-in AC adapter, and can be broadly divided into those that supply power and / or distribute power to the device, and those that do not have an AC adapter and only distribute power. The conduit connection structure of the invention may be applied to any of them. However, a box with a built-in AC adapter is attached to a wall or supported by a support column and used in an environment where moisture cannot easily enter. A box embedded in the ground where moisture can easily enter has a built-in AC adapter. However, it is preferably applied to distribution, branching, or feeding (extension of electric wires).

  And the connector which fits a conduit tube as shown, for example in patent document 1 or patent document 2 is provided in the said box for the connection with the said conduit tube. In these connectors, a cylindrical portion protrudes from a hole formed in the box, and a conduit is screwed into and connected to a female screw portion inside the cylindrical portion.

Registered Utility Model No. 3039849 Japanese Utility Model Publication No. 64-16115

  Devices such as lighting fixtures used in the above-mentioned exteriors and gardens of the house have a relatively low voltage. For example, in the case of LED lighting fixtures, a sufficient amount of light can be used even at 12V with little concern for electric shock. It is getting to get. And for wiring with a voltage of 36V or less, even if you are not qualified as an electrician, it can be easily installed by, for example, a landscaping company or do-it-yourself carpenter, and you can add, replace, or relocate equipment. Is also easy.

  Therefore, in a box installed on the ground, the wire drawn from the box is immediately drawn into the equipment next to the box, or it is routed as it is on the ground or on the paved road surface, so that the wire may not be covered with the conduit. is there. In such a case, in the above-described conventional technology, the cylindrical portion of the connector remains protruding from the box, which is suitable for the curing of the electric wire, but is not aesthetically pleasing.

  An object of the present invention is to provide a connection structure for a conduit that can improve the aesthetic appearance of the connector for connecting the conduit to the box when the conduit is not connected, and a power distribution device using the connection structure. is there.

  The conduit connection structure of the present invention is a conduit connection structure that enables a conduit for protecting the wire to be connected to a box from which a wire for power supply and distribution is drawn. The connector has an opening / closing lid, and a side wall from which the electric wire is drawn is formed with a notch continuous from an opening that covers the opening / closing lid, and is fitted into the notch and is a connector that can connect the conduit. A cylindrical portion that is inserted into the notch and is inserted into the notch, and is arranged at an interval in the axial direction of the cylindrical portion, and extends radially outward from an outer peripheral portion of the cylindrical portion. And a pair of flange pieces that are engaged with a peripheral edge portion of the notch, wherein one end side of the cylindrical portion is formed flush with one flange piece, and the other end side of the cylindrical portion is the other side. The flange piece is formed by exceeding the predetermined length, and the predetermined length An inner peripheral surface or an outer peripheral surface of the part, fitted in the conduit, a disconnected the conduit is characterized in that the one flange on one side is fitted into-out in notches so that the outer.

  According to said structure, when protecting the electric wire for electric power feeding and / or distribution with an electric conduit for outdoor installation, underground laying, etc., the box from which the said electric wire is drawn, and the said electric conduit For connection, a connector for fitting the conduit is used. Then, the shape of the connector and the attachment to the box are devised.

  Specifically, the front of the box is openable and closable by an open / close lid for connection of the drawn electric wire to a terminal block, etc., and the electric wire is connected to the side wall of the box forming an opening by the open / close lid. A notch continuous from the opening is formed in the drawn portion.

  On the other hand, the connector to be fitted into the notch has a space slightly larger than the thickness of the side wall in the axial direction of the cylinder part and the cylinder part to be fitted into the notch, with the electric wire passing through the inside. And a pair of flange pieces which are formed to extend radially outward from the outer peripheral portion of the cylindrical portion and engage with the peripheral edge portion of the notch. Therefore, the connector can be appropriately detached from the opening side.

  One end side of the cylindrical portion is formed flush with one flange piece, and the other end side of the cylindrical portion is formed to exceed the other flange piece by a predetermined length, and a portion of the predetermined length. The conduit is fitted to the inner peripheral surface or the outer peripheral surface. On the other hand, when the conduit is not used, that is, when the wire is not drawn out or is drawn with a bare wire and the conduit is not connected, the connector is arranged so that one flange one side is outward. Fit into the notch.

  Therefore, by fitting the connector into the notch so that the other end side of the cylindrical portion is the outside of the box, as described above, the conduit tube is fitted at the predetermined length portion of the cylindrical portion. Can do. On the other hand, the part which protrudes outside can be made small by inserting a connector into a notch so that the one end side of the cylinder part may become the outer side of a box. As a result, the electric wire drawn out of the box is immediately drawn into the equipment next to the box, or it is routed as it is on the paved road surface, so that the electric wire is not covered or the electric wire itself is not drawn out. When the conduit is not connected to the box, the protruding portion of the connector to the outside of the box can be reduced, and the appearance can be improved. Even when the conduit is not connected, the portion of the cylindrical portion extending in the inside prevents the wire from hitting the inner peripheral surface of the notch and damaging it, that is, curing the wire. It can also be done.

  Moreover, the power distribution apparatus of this invention uses the said connection structure of the conduit for the electric wire extraction part from a box, and the 1 or several apparatus supplied and distributed by the said box, an electric wire, a connector, and the said electric wire It is characterized by comprising.

  According to said structure, in the apparatus which draws out an electric wire from a box and supplies and distributes electric power to one or a plurality of devices, either with or without using a conduit for drawing out the electric wire from the box However, it is possible to realize a power supply and distribution device that can be easily and appropriately handled.

  Furthermore, in the power distribution apparatus according to the present invention, the box has a built-in AC adapter, and the electric wire is a power distribution line of 36V or less.

  According to the above configuration, when the box contains an AC adapter and the AC adapter is a small transformer with a secondary voltage of 36V or less, the construction of the secondary side wiring is light. The qualification of an electrician becomes unnecessary for the construction, and the convenience can be improved.

  Moreover, in the power distribution apparatus of this invention, the apparatus connected to the said electric wire is the LED lighting fixture which uses DC12V as a power supply, The power distribution apparatus of Claim 3 characterized by the above-mentioned.

  According to the above-described configuration, the LED lighting apparatus is suitable because it is possible to obtain a large amount of light even at 12 V, in which the voltage is reduced and there is almost no fear of electric shock.

  Furthermore, the power supply / distribution device of the present invention is implemented in an exterior or a garden of a house.

  According to said structure, as mentioned above, the power distribution apparatus which is excellent in aesthetics and is easy to construct is especially suitable for the exterior of a house, a garden, etc.

  As described above, the conduit connection structure and the power distribution device using the same according to the present invention are formed by forming a notch continuous from the opening on the side wall of the box and fitting the cylindrical portion of the connector therein. The connector is detachable, and the connector is provided with a pair of flange pieces that are engaged with the peripheral edge of the notch on the outer periphery of the cylindrical portion, and one end side of the cylindrical portion is flush with one flange piece. The other end side is formed to exceed the other flange piece by a predetermined length, and the conduit is fitted to a portion of the predetermined length.

  Therefore, depending on which direction the connector is attached to the box, when the conduit is fitted or when the conduit is not fitted, the protruding portion of the connector can be reduced to improve the aesthetic appearance.

It is a perspective view showing a schematic structure of a power distribution device to which a conduit connection structure according to an embodiment of the present invention is applied. It is a perspective view which opens and shows the lid | cover of the AC adapter built-in box in the said power distribution apparatus. It is a perspective view which expands and shows FIG. 2 further.

  FIG. 1 is a perspective view showing a schematic configuration of a power distribution device 1 to which a conduit connection structure according to an embodiment of the present invention is applied. The apparatus 1 includes a box 2, an electric wire 3, a connector 4, a conduit 5 used as appropriate, and one or a plurality of devices (not shown).

  In the example of FIG. 1, the box 2 includes an AC adapter. The AC adapter is supplied with power from an outdoor outlet 7 provided on the wall surface 6 of the house, and receives a low voltage from the AC adapter, for example, a DC voltage of 12V. Then, the electric power is supplied to the device (not shown) via the electric wire 3. In the example of FIG. 1, the box 2 is illustrated as being fixed to the wall surface 6 by screwing or the like, but may be supported by being provided with a post or the like and independently spaced from the ground 8. . The box 2 is not limited to being installed on the ground, and may be used by being buried underground. However, when the box 2 is used by being embedded, it is preferable that the AC adapter is not built in to prevent moisture intrusion and the like, and is applied to distribution, branching, or feeding (extension of electric wires).

  The device is, for example, an LED lighting device that uses the DC12V as a power source. And preferably, the power distribution apparatus 1 of this invention is implemented in the exterior and garden of a house. The exterior includes an outer wall, an entrance to the entrance, and a parking lot. Illumination for these applications has a relatively small amount of light, and LED lighting fixtures have a lower voltage and higher brightness, and even with the 12V, which has almost no fear of electric shock, a sufficient amount of light is secured for these applications. be able to. For example, the maximum power supply of the AC adapter is 75W. And since the AC adapter becomes a small transformer whose secondary voltage is 36V or less, the construction of the secondary side wiring, that is, the electric wire 3, becomes a minor construction, and the electrician's qualification is unnecessary for the construction. Become. For this reason, the landscaping company or, in some cases, the resident of the house can perform work at a Sunday carpenter, and the convenience can be improved.

  FIG. 2 is a perspective view showing the box 2 having the AC adapter built therein with the lid 21 opened, and FIG. 3 is a perspective view showing FIG. 2 further enlarged. The lower half of the box 2 can be opened by a lid 21 for the connection work of the electric wire 3. The AC adapter is built in the upper half, and the exterior is the equipment. A display control unit 22 of a certain LED lighting apparatus is provided. The display control unit 22 includes, for example, a timer period indicating how many hours the LED lighting apparatus is lit from sunset, an illuminance sensor for detecting the sunset and sunrise, a power button, An indicator for confirming the operation of the sensor may be provided.

  As shown in FIGS. 2 and 3, when the lid 21 is opened, the AC 100 V power line 23 from the outdoor outlet 7 is drawn on the left side of the box 2. In the example of FIGS. 2 and 3, the power supply line 23 is a parallel twisted wire covered with vinyl chloride. When the portion where the lid 21 and the display control unit 22 are provided is the front of the box 2, a notch 241 for drawing the power line 23 is formed in the bottom plate 24 which is a side wall of one surface.

  A terminal box 25 is provided on the right side of the box 2 with the lid 21 opened. In FIGS. 2 and 3, the lid of the terminal box 25 is also opened. In the terminal box 25, DC12V feed lines 261 and 262 are drawn from the AC adapter. In the example of FIGS. 2 and 3, the feeder lines 261 and 262 are made of a pair of single-core stranded wires coated with vinyl chloride. A pair of plus and minus power supply lines 261 and 262 are connected to terminal blocks 271 and 272, respectively, and four electric wires 3 (FIG. 2 and FIG. 2) are connected through the terminal blocks (5 taps in the examples of FIGS. 2 and 3). In the example of FIG. 3, power is supplied to the two lines 31 and 32). The electric wire 3 is also a parallel twisted wire coated with vinyl chloride.

  In the box 2 configured as described above, a notch 252 is formed in the bottom plate 251 of the terminal box 25 and a notch 242 is formed in the bottom plate 24 for drawing out the electric wire 3. The notch 252 is formed in a U shape from the opening of the terminal box 25 along the outer shape of the cylindrical electric wire 3. When the terminal box 25 is covered with a lid (not shown), the electric wire 3 is sandwiched between the lid and the peripheral edge of the notch 252 of the bottom plate 251.

  On the other hand, the notch 242 is formed in the bottom plate 24 of the box 2 in a U-shape or a rectangular U-shape having an arc surface from the opening with a width sufficiently larger than the diameter of the two wires 3. ing. Since the notch 242 has a large width (diameter), the connector 4 is fitted to reduce the opening area regardless of whether or not the electric wire 3 is pulled out. Two insertion holes 41 respectively corresponding to the two electric wires 3 are formed in one connector 4.

  The connector 4 allows the conduit 5 to be connected. In the present invention, a hole for drawing out the electric wire 3 formed in the bottom plate 24 of the box 2 is formed in the notch 242 that continues from the opening. In addition, the connector 4 is characterized by the shape of the connector 4 and the attachment to the box 2.

  3A shows a state in which the connector 4 and the conduit 5 that have passed through the electric wire 3 are assembled to the box 2, and FIG. 3B shows the state in which the conduit 5 has been inserted into the connector 4 through the electric wire 3. The state before attachment is shown, and (c) shows the state before attachment to the box 2 just by passing the electric wire 3 through the connector 4. In FIG. 2 and FIG. 3A, in order to show the structure in an easy-to-understand manner, the conduit 5 is not attached to the connector 4 on the right side of the electric wire 3 being drawn out, and the electric wire 3 is not drawn out. The conduit 5 is attached only to the left connector 4 (originally, the wire 3 is inserted into at least the left connector 4 to which the conduit 5 is attached). In FIG. 1, the conduit 5 rises from the ground 8 and is connected to the box 2 by the connector 4, and the two wires 31 and 32 are directly bare from the box 2 through the connector 4 (the conduit 5 is covered). It shows an example of being pulled out (without being drawn) and being drawn on the ground 8.

  The connector 4 is disposed in the axial direction of the cylindrical portion 42 with a gap slightly larger than the thickness of the bottom plate 24, through which an electric wire is inserted and fitted into the notch 242. A pair of flange pieces 43 and 44 are formed to extend radially outward from the outer peripheral portion and engage with the peripheral edge of the notch 242. The one end 421 side of the cylindrical portion 42 is formed flush with one flange piece 43, and the other end side is formed beyond the other flange piece 44 by a predetermined length. A peripheral surface or an outer peripheral surface (inner peripheral surface in FIGS. 2 and 3) is fitted to the conduit 5. In FIG.3 (b), the electric conduit 5 is formed in bellows shape, and the internal peripheral surface of the part 45 may be formed in the unevenness | corrugation corresponding to it, in order to prevent removal. Further, in order to prevent the conduit 5 from coming off, the cylindrical portion 42 is a double cylinder, and a nut is screwed onto the outer peripheral surface of the outer cylinder so that the end of the conduit 5 is attached to the double cylinder. You may make it tighten between.

  Therefore, as described above, the notch 242 is formed in the bottom plate 24 of the box 2 in a U-shape or rectangular U-shape that is continuous with the opening. A pair of flange pieces 43 and 44 sandwich the peripheral edge portion of the notch 242 in the bottom plate 24 while being detachably attached and fitted from the portion 242, and the axial displacement of the cylindrical portion 42 is prevented. Further, the displacement of the connector 4 in the direction perpendicular to the axis is also prevented by the lid 21 covering the opening and the inner peripheral surface of the notch 242 in the bottom plate 24.

  Then, as shown in FIG. 3 (b), the connector 4 is fitted into the notch 242 so that the other end 422 side of the cylindrical portion 42 is outside the box 2, so that the conduit 5 is connected at the portion 45. Can be fitted. On the other hand, as shown in FIG. 3C, the connector 4 is inserted into the notch 242 so that the one end 421 side of the cylindrical portion 42 is outside the box 2, so that a portion protruding to the outside is provided. Can be small. As a result, the electric wire 3 drawn out from the box 2 is immediately drawn into a device next to the box 2 or drawn on the paved road surface as it is, so that the electric pipe 3 is not covered with the electric wire 3 or the box 2 When the electric wire 3 itself is not drawn out from the cable 2 and the conduit 5 is not connected to the box 2, the protruding portion of the connector 4 to the outside of the box 2 can be reduced, and the aesthetic appearance can be improved. In addition, although the conduit 5 is not connected, when the wire 3 itself is drawn out, the wire 3 hits the inner peripheral surface of the notch 242 and is damaged by the portion 45 of the cylindrical portion 42 extending inside. This can be prevented, that is, the electric wire 3 can be cured.

  Such a power supply / distribution device 1 is a device that draws the electric wire 3 from the box 2 and supplies / distributes electric power to one or a plurality of devices, and uses the conduit 5 for drawing the electric wire 3 from the box 2. It is possible to easily and appropriately deal with both cases where there is no case. Moreover, since it is excellent in aesthetics and easy to construct, it is particularly suitable for the exterior or garden of a house.

  Here, when the number of the electric wires 3 drawn out from the box 2 is small and there is a notch 242 from which the electric wires 3 are not drawn out, the connector 4 may not be attached, but insects and raindrops enter the box 2. In order to suppress this, a dummy may be provided as described above. In that case, as shown in FIG. 3C, the connector 45 is fitted into the notch 242 so that the portion 45 of the connector 4 is the inside of the box 2 and the outside is the flange 43 with less unevenness. Also, when the connector 4 is formed by resin molding, corresponding to the case where it is used as a dummy, the opening end on the flange 43 side of the insertion hole 41 is initially closed with a thin plate, and the wire is actually When 3 is inserted, the closed portion may be opened by being pierced by a driver or the like.

DESCRIPTION OF SYMBOLS 1 Power supply / distribution apparatus 2 Box 21 Lid 22 Display control part 23 Power supply line 24 Bottom plate 241,242 Notch 25 Terminal box 251 Bottom plate 261,262 Feed line 271,272 Terminal block 3; 31,32 Electric wire 4 Connector 41 Insertion hole 42 Tube Portions 43, 44 Flange piece 45 Portion 5 Conduit 6 Wall surface 7 Outdoor outlet 8 Ground

Claims (5)

In a connection structure of a conduit that enables connection of a conduit for protecting the wire to a box from which a wire for power supply and distribution is drawn,
The box has an open / close lid on the front, and a side wall from which the electric wire is drawn is formed with a notch continuous from an opening that covers the open / close lid,
A connector that is fitted in the notch and can connect the conduit.
A cylindrical portion that is inserted into the notch through the wire,
A pair of flange pieces arranged at an interval in the axial direction of the cylindrical portion, extending from the outer peripheral portion of the cylindrical portion outward in the radial direction, and locked to the peripheral edge of the notch,
One end side of the cylindrical portion is formed flush with one flange piece, and the other end side of the cylindrical portion is formed to exceed the other flange piece by a predetermined length, and within the predetermined length portion. The peripheral surface or the outer peripheral surface is fitted to the conduit,
A connection structure for a conduit, wherein when the conduit is not connected, it is fitted into a notch so that the one flange side is outward.   The connection structure for a conduit according to claim 1 is used for a wire lead-out portion from a box, and includes the box, an electric wire, a connector, and one or a plurality of devices supplied and distributed by the electric wire. A power distribution device characterized by that.   The power distribution device according to claim 2, wherein the box includes an AC adapter, and the electric wire is a power distribution line of 36V or less.   The power supply / distribution device according to claim 3, wherein the device connected to the electric wire is an LED lighting device using DC 12 V as a power source.   The power supply / distribution device according to any one of claims 2 to 4, wherein the power supply / distribution device is applied to an exterior or a garden of a house.

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