JP2009183039A - Electrical connection box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrical connection box that can improve working efficiency when electrical connection is performed on site. <P>SOLUTION: The electrical connection box 1 is attached to a box 3 of a bus duct having taps 20, 21, 22 for electrical connection and houses the taps 20, 21, 22. The electrical connection box 1 includes a slide guide unit 60 for sliding to a position P where the taps 20, 21, 22 of the enclosure are housed along the direction S of the length of the box 3. The slide guide unit 60 is preferably formed on the bottom face portion 56 side of the electrical connection box 1. The slide guide unit 60 is a recess for fitting the receiving portions 5, 5 of the box 3. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cable connection box, and more particularly to an electric connection box mounted on a bus duct having taps for electrically connecting a connection object such as a bolt-on device, an electric device, and a cable electric wire at the terminal end and the middle.

The bus duct includes taps for electrically connecting bolt-on devices, devices, electric wires, and the like at the end and the middle. This tap is accommodated in the cable connection box.
FIG. 7 is a perspective view showing a conventionally used cable connection box and bus duct. FIG. 8A is a plan view showing a structural example of a conventional cable connection box and bus duct, FIG. 8B is a front view, and FIG. 8C is a side view.

As shown in FIGS. 7 and 8, the cable connection box 101 is fixed to the box 120 of the bus duct 100 using screws or the like. Taps 102, 103, and 104 that are conductor portions for connection are provided to project in the D direction through the opening 105 of the box 120.
The cable connection box 101 accommodates taps 102, 103, 104, and electric wires 110, 111, 112 are connected to the taps 102, 103, 104. The cable connection box 101 is fixed on the support plate 121 so as to be stably attached to the box 120. These electric wires 110, 111, 112 are led out through the opening 115 of the cable connection box 101.
By the way, the technique relevant to such a cable connection box is disclosed by patent document 1, for example.
JP 2004-229358 A

  However, since the cable connection box 101 is large and fixed to the box 120, it is difficult to attach the cable connection box 101 to the box 120 at the site. The work of attaching the electric wires 110, 111, 112 to the taps 102, 103, 104 in the field is to remove the screw of the lid 119 on the upper surface of the cable connection box 101 and remove it, and then in the cable connection box 101 with less extra space. Must be done.

For this reason, the work efficiency of the attachment work of the electric wires 110, 111, and 112 on site will fall. Further, the opening 115 of the cable connection box 101 is formed by processing at the site, the working efficiency of the opening 115 is poor, and the work of taking out and handling the wires 110, 111, 112 is troublesome. It is.
Moreover, in the technique described in Patent Document 1, the box-shaped plug-in device is fixed to the bus duct with the mounting portion and the screw, and then the cable connection work is performed. Installation work of the cable is difficult and work efficiency is lowered.
Then, in order to eliminate the said subject, this invention aims at providing the electrical connection box which can improve the working efficiency at the time of electrical connection in the field.

In order to solve the above problems, an electrical connection box of the present invention is an electrical connection box that is mounted on a box of a bus duct having a tap for electrical connection and accommodates the tap,
It has a slide guide part for sliding along the longitudinal direction of the box toward the position which stores the tap of the box.
In the electrical connection box of the present invention, preferably, the slide guide portion is formed on a bottom surface side of the electrical connection box, and the slide guide portion is a recess for fitting the receiving portion of the box. It is characterized by.

  In the electrical connection box of the present invention, preferably, the box is provided with a stopper for positioning the electrical connection box at a position where the tap of the box is accommodated.

  The electrical connection box of the present invention is preferably characterized in that a guide opening for guiding the stopper is formed on the bottom surface of the electrical connection box.

  In the electrical connection box of the present invention, preferably, the receiving portion of the box is formed with a tap lead-out opening for projecting the tap from the box to the outside along the longitudinal direction of the box. The plurality of stoppers are provided on one end side and the other end side of the tap derivation opening in the receiving portion of the box.

In the electrical connection box of the present invention, preferably, the plurality of stoppers are arranged symmetrically with respect to a center line along the longitudinal direction of the receiving portion of the box.
The electrical connection box of the present invention is preferably characterized in that it has an opening for leading out the cable wire electrically connected to the tap.

  According to the present invention, it is possible to improve work efficiency when performing electrical connection on site.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing a preferred embodiment of the electrical connection box of the present invention. FIG. 2 is a side view having a cross section of the electrical connection box shown in FIG. 1 as viewed from the G direction.
The cable connection box 1 shown in FIGS. 1 and 2 is also called an end tap box, and is an example of an electrical connection box. The cable connection box 1 is attached to the box 3 of the bus duct 2 so as to be slidable along the S direction, for example. The box 3 of the bus duct 2 has a plurality of taps 20, 21, 22 for branching and electrically connecting the cable wires.

  The cable connection box 1 and the box 3 constitute a bus duct 2. The taps 20, 21, and 22 of the box 3 of the bus duct 2 are provided to electrically connect, for example, bolt-on devices, electrical devices, cable wires, and the like as electrical connection objects at the end and / or the middle. It has been. In the embodiment of the present invention, a cable electric wire will be described as an example of an electrical connection object for a tap.

First, the structure of the box 3 shown in FIGS. 1 to 3 will be described. FIG. 3 is a cross-sectional view showing a structural example of the box 3.
The box 3 is a member formed linearly along the S direction, and is formed by joining two members 4 and 4 having the same shape in opposite directions as shown in FIG. .
The box 3 has a receiving part 5, a conductor holding part 6, and a base part 7. In the shape example shown in FIG. 3, the receiving portion 5, the conductor holding portion 6, and the base portion 7 are formed in a vertically symmetrical shape with the horizontal center line HL shown in FIG. 3 as the center. Further, the receiving portion 5, the conductor holding portion 6, and the base portion 7 are formed in a symmetrical shape with respect to the vertical line VL shown in FIG. The receiving part 5 and the base part 7 are formed in parallel to the center line HL. The conductor holding portion 6 is formed between the receiving portion 3 and the base portion 7, and the conductor holding portion 6 holds three conductors 10, 11, and 12.

  4 and 5 are plan views showing the box 3 and the cable connection box 1. FIG. 4 shows a state before the cable connection box 1 is positioned at a predetermined position P of the box 3. As shown in FIG. FIG. 5 shows a state after the cable connection box 1 is positioned at a predetermined position P of the box 3.

  As shown in FIGS. 4 and 5, a rectangular tap derivation opening 16 is formed at a predetermined position of the receiving portions 5, 5 of the box 3. The tap derivation opening 16 is formed so that the taps 20, 21, and 22 of the conductors 10, 11, and 12 shown in FIG. 2 protrude from the inside of the conductor holding portion 6 in a direction perpendicular to the plane of FIG. . The tap derivation opening 16 is a notch formed only in a portion for taking out the taps 20, 21, and 22 so as not to lower the strength of the box 3.

  As shown in FIG. 4, two sets of stoppers 30 and 31 protrude from the receiving portions 5 and 5 of the box 3 on one end side (front side) and the other end side (rear side) with respect to the S direction. Is formed. These four stoppers 30 and 31 position the cable connection box 1 at a predetermined position P as shown in FIGS. 4 to 5 when the cable connection box 1 is slid and mounted along the S direction. Used to do. The four stoppers 30 and 31 are, for example, members having a rectangular cross section. The four stoppers 30 and 31 are arranged so as to be symmetric with respect to the center line CL of the receiving parts 5 and 5 of the box 3 two by two.

  As shown in FIGS. 1 and 2, the middle-phase tap 20 located in the center has a flat plate shape, but the plus-side tap 21 and the minus-side tap 22 each have, for example, an L-shaped cross section. Facing the opposite direction. The mid-phase tap 20 extends slightly higher than the taps 21 and 22 in order to secure an electrical insulation distance with respect to the other taps 21 and 22. These taps 20, 21 and 22 have holes, respectively, and the conductor wires of the cable electric wires 40, 41 and 42 are electrically and mechanically connected using the holes as shown in FIG. Is done.

Next, the structure of the cable connection box 1 will be described.
As shown in FIG. 1, the cable connection box 1 is a rectangular parallelepiped box made of a metal material, and includes an upper surface portion 51, side surface portions 52 and 53, a front surface portion 54, and a rear surface portion 55. , And has a bottom surface portion 56.

The rear surface portion 55 is formed with an introduction opening 59 for passing the taps 20, 21, 22 and the three cable wires 40, 41, 42. The opening 59 has a size that allows the taps 20, 21, 22 and the three cable wires 40, 41, 42 to pass therethrough.
Thereby, the cable connection box 1 can cover the taps 20, 21, and 22 only by sliding the cable connection box 1 in the S direction opposite to the G direction.
Conversely, the cable connection box 1 can be separated from the taps 20, 21, 22 to expose the taps 20, 21, 22 simply by sliding the cable connection box 1 in the G direction. The cable wires 40, 41, and 42 can be easily led out from the cable connection box 1 to the outside through the opening 59, and the workability of the cable wires 40, 41, and 42 is improved.

As shown in FIGS. 1 and 2, the bottom surface portion 56 of the cable connection box 1 has a slide guide portion 60 that matches the shape of the receiving portions 5 and 5 of the box 3. The slide guide portion 60 is a guide recess. The slide guide 60 guides the cable connection box 1 along the longitudinal direction (S direction) of the box 3 toward a predetermined position P in which the taps 20, 21, 22 of the box 3 are accommodated. And slide.
Thereby, the slide guide part 60 of the cable connection box 1 can be slid along the S direction by fitting the slide guide part 60 of the cable connection box 1 to the receiving parts 5 and 5 of the box 3. The bottom surface portion 56 of the cable connection box 1 has a large guide opening 63 as shown in FIG.

  The guide opening 63 is formed as a rectangular opening from the rear surface 55 side toward the front surface 54, and when the guide recess 60 of the cable connection box 1 is slid along the S direction, The stoppers 30 and 31 are guided along the edge portion forming the opening 63, and the stoppers 30 and 30 abut against the inner end portion 64 of the opening 63. Therefore, the cable connection box 1 is guided by the stoppers 30 and 31 and can be positioned at a predetermined position P of the box 3.

Next, a connection work example of the above-described cable wires 40, 41, and 42 and a mounting work example of the cable connection box 1 will be described.
As shown in FIG. 4, the cable connection box 1 is away from a predetermined position P of the receiving portions 5 and 5 of the box 3 in advance.
As shown in FIG. 4, three taps 20, 21, and 22 protrude from the opening 16 of the receiving portions 5 and 5 of the box 3 along the vertical direction R on the paper surface. The conductor portions of these cable wires 40, 41, and 42 are electrically connected to the taps 20, 21, and 22, respectively.

When the connection to the tap is finished, the cable connection box 1 shown in FIG. 4 is slid in the S direction along the receiving portions 5 and 5 of the box 3. Then, when the stoppers 30 and 31 enter the opening 63 and the stoppers 30 and 30 abut against the inner end 64 of the opening 63 as shown in FIG. 5, the cable connection box 1 is as shown in FIG. In addition, the box 3 can be positioned at a predetermined position P in the S direction. At this time, the four stoppers 30 and 31 can reliably guide the cable connection box 1 along the S direction.
Thus, when the cable connection box 1 is positioned, as shown in FIGS. 1 and 5, the cable connection box 1 accommodates the taps 20, 21, and 22, and the three cable wires 40, 41 and 42 are led out of the cable connection box 1 through the opening 59.

  The stoppers 30 and 31 position the cable connection box 1 at a predetermined position P of the box 3 to prevent it from sliding too much in the S direction. Further, as shown in FIG. 4, the stoppers 30 and 31 are arranged in a bilaterally symmetric shape around the center line CL, so that the cable connection box 1 can be accurately guided so as not to bend along the S direction. When the cable connection box 1 is slid, the cable connection box 1 can be prevented from rolling in the L direction orthogonal to the S direction and the P direction in FIG. By preventing the cable connection box 1 from rolling, it is possible to prevent the conductor insulation from being damaged by shaking when the cable connection box 1 slides.

In the above-described embodiment of the present invention, a support plate that has been necessary in the past is not required, the number of parts of the box 3 is reduced, and a place for connecting the cables is facilitated. The conventional support protrudes to the side of the box, but since a support plate is unnecessary, this is not the case, and the bus duct can be downsized.
After the cable wires 40, 41, and 42 are attached to the taps 20, 21, and 22, the cable connection box 1 can be slid to be attached or detached, thereby improving on-site construction workability.

Next, another embodiment of the present invention will be described.
FIG. 6 shows an example in which the embodiment shown in FIG. The cable connection box 1 can be slid along the receiving portions 5 and 5 of the box 3 even when the cable connection box 1 is arranged sideways in this manner.

  The electrical connection box of the embodiment of the present invention is mounted on a box body of a bus duct having a tap for electrical connection and accommodates the tap. This electrical connection box includes a slide guide portion for sliding along the longitudinal direction of the box toward a position where the tap of the box is accommodated.

  As a result, unlike the conventional case, when attaching the electric wire to the tap in the field, it is not necessary to remove the cover on the upper surface of the cable connection box by removing the screw, and the work is performed in the cable connection box with little extra space. There is no need to do it. Accordingly, it is possible to improve the work efficiency of the wire installation work on site.

The slide guide part is formed on the bottom face side of the electrical connection box, and the slide guide part is a recess for fitting the receiving part of the box. Accordingly, the electric connection box can be securely slid and accommodated at the position where the tap is accommodated while adopting a simple structure.
The box is provided with a stopper for positioning the electrical connection box at a position where the box tap is accommodated. Thereby, the electrical connection box can be reliably positioned at the position where the tap is accommodated, and the sliding operation of the electrical connection box becomes easy.

  A guide opening for guiding the stopper is formed at the bottom of the electrical connection box. As a result, the electrical connection box guides the stopper through the guide opening, so that the electrical connection box can be reliably positioned at the position where the tap is accommodated, and the electrical connection box can be easily slid.

  The receiving portion of the box has a tap lead-out opening along the longitudinal direction of the box for projecting the tap from the box to the outside. It is provided on one end side and the other end side of the lead-out opening. Thereby, the electric connection box can be reliably positioned at the position where the tap is accommodated while adopting a simple structure.

The plurality of stoppers are arranged symmetrically with respect to the center line along the longitudinal direction of the receiving portion of the box. Thereby, the electrical connection box can slide stably along the longitudinal direction while preventing rolling.
The electrical connection box has an opening for leading the cable wire electrically connected to the tap to the outside. Thereby, a cable electric wire can be easily derived | led-out from the inside of an electrical connection box, and the manageability of a cable electric wire can be improved.

By the way, this invention is not limited to the said embodiment, A various modified example is employable.
For example, the four stoppers 30 and 31 shown in FIG. 4 are, for example, members having a rectangular cross section, but other shapes can also be adopted, and for example, circular members may be used. Six or more stoppers 30 and 31 may be provided. Further, the stoppers 30 and 31 may not be provided directly on the receiving portion 5 of the box 3 but may be provided on a bracket to be attached to assist the strength of the box 3. The shape of the cable connection box is not limited to a rectangular parallelepiped shape, but may be another type of shape, for example, a cylindrical shape.
The connection object to be connected to the tap is not limited to the cable electric wire but may be a bolt-on instrument or an electric device.
Each embodiment of the present invention can be used in any combination.

It is a perspective view which shows preferable embodiment of the cable connection box of this invention. It is the side view which has the cross section which looked at the electrical connection box shown in FIG. 1 from the G direction. It is sectional drawing which shows the structural example of a box. It is a figure which shows the state before a cable connection box is positioned in the predetermined position P of a box. It is a figure which shows the state after a cable connection box is positioned in the predetermined position P of a box. It is a figure which shows another embodiment of this invention. It is a perspective view which shows a prior art example. It is a figure which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cable connection box 2 Bus duct 3 Box 5 Receiving part 6 Conductor holding part 7 Base 10, 11, 12 Conductor 16 Tap extraction opening 20, 21, 22, Tap 30, 31 Stopper 40, 41, 42 Cable electric wire 59 Opening 60 Slide guide portion 63 Guide opening portion 64 Inner end portion of the opening portion P Predetermined position

Claims (7)

An electrical connection box that is mounted on a box of a bus duct having a tap to be electrically connected and accommodates the tap,
An electrical connection box comprising a slide guide portion that slides along a longitudinal direction of the box toward a position where the tap of the box is accommodated.   2. The electrical connection according to claim 1, wherein the slide guide portion is formed on a bottom surface portion side of the electrical connection box, and the slide guide portion is a recess into which the receiving portion of the box is fitted. box.   The electrical connection box according to claim 1 or 2, wherein a stopper for positioning the electrical connection box at a position where the tap of the box is accommodated is provided on the box.   The electrical connection box according to claim 3, wherein a guide opening for guiding the stopper is formed in the bottom surface portion of the electrical connection box.   The receiving portion of the box has a tap lead-out opening for projecting the tap from the box to the outside along the longitudinal direction of the box. 5. The electrical connection box according to claim 4, wherein the receiving portion is provided on one end side and the other end side of the tap derivation opening.   The electrical connection box according to claim 5, wherein the plurality of stoppers are symmetrically arranged on a center line along the longitudinal direction of the receiving portion of the box.   The electrical connection box according to any one of claims 1 to 6, further comprising an opening that leads out the cable electric wire that is electrically connected to the tap.

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