JPH11275735A - Wire junction box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate a joint work at an elevated place, and furthermore, prevent a cover from falling off easily, even if the cover is repeatedly attached and detached. SOLUTION: This wire junction box 1 has an opening surface 10 to which a cover 2 is attached detachably. Through holes 11 and 12 are formed in the box unit 1, and wires are introduced into the box unit 1 through the through holes to be connected or branched in the box unit 1. A retaining hole 15 is formed in the side surface of the box unit 1, and furthermore, a screw hole 16 is formed in the side surface of the box unit 1 facing the side surface with the retaining hole 15. A retainer 22 which is retained with the retaining hole of the box unit and a screwing part 23, which is aligned with the screw hole of the box unit and into which the leg of a screw screwed to fit to the screw hole can be put through its side, are provided on the cover 2. In addition, the tip of the screwing part 23 is bent outward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire connection box used for connecting or branching electric wires.

[0002]

2. Description of the Related Art An electric wire connection box called a connection box or a branch box is used when connecting an indoor wiring to an indoor wiring when the outdoor wiring is drawn indoors or performing electrical wiring such as branching between indoor wirings. .

[0003] As a conventional wire connection box as described above,
There are those disclosed in Japanese Patent Application Laid-Open No. 9-261819 and the like, and those shown in FIGS. 3 and 4. Hereinafter, a conventional wire connection box will be described with reference to FIGS. 3 and 4. FIG. 3 is an explanatory view showing a box body of a conventional electric wire connection box. FIG. 3 (a) is a plan view, and FIG. 3 (b) is a cross-sectional view along AA. FIG. 4 is an explanatory view showing a cover of a conventional electric wire connection box, FIG. 4 (a) is a plan view, and FIG. 4 (b) is a cross-sectional view along AA.

The box 1 of the electric wire connection box is a box-shaped box made of sheet metal having a substantially square shape in plan view as shown in FIG. 3, and the top surface is an opening surface 10 in FIG. In actual use, the opening surface 10 may be used as the lower surface in some cases. By the way, in the electric wire connection box shown in FIG. 3, three side surfaces of each side surface of the box 1 are connected to insertion holes for connecting an electric conduit (not shown) and inserting electric wires and the like. Each has a corresponding round knockout hole 11. The other one side surface of the box body 1 is provided with a notch-shaped groove 12 corresponding to an insertion hole for connecting a wire gutter (not shown) and inserting an electric wire or the like. Further, in the vicinity of the opening face 10 of a pair of opposing side faces of the box body 1, push-cut one-sided concave ridges 13, 13 are formed on both sides, respectively.

In FIG. 3A, reference numeral 14 denotes a wire gutter connecting portion having a U-shaped cross section. The wire gutter connecting portion 14 is provided with a spot welding margin 14 provided by bending and opening the wire gutter connecting portion 14.
a and 14a are fixed to the box body 1 by welding.

[0006] As shown in FIG. 4, the lid 2 is a substantially square plate having a size just covering the opening surface 10 of the box 1. The lid 2 is detachably attached so as to close the opening surface 10 of the box 1. The lid 2 is bent and raised substantially at right angles to the surface of the lid 2 on a pair of opposing sides.
The peripheral edge is provided with two positioning pieces 20 and 20 and two locking pieces 21 and 21 which are bent at right angles to the surface of the lid 2 on the other side of the other set. I have. At the center of each locking piece 21, a horizontal one-character ridge 2
1a is formed.

[0007] Incidentally, since the electric wire junction box is used for connection between outdoor wiring and indoor wiring, branching between indoor wiring, and the like, it is often mounted on a ceiling of a building near a service drop, a wall surface near a ceiling, or the like. The worker must attach and remove the lid 2 at a high place and in a poor posture.

Therefore, in the above-described electric wire connection box, the direction in which the locking piece 21 of the lid 2 is provided is matched with the direction in which the concave strip 13 of the box 1 is provided, and the opening surface of the box 1 is opened. As long as the cover 2 is pressed against the cover 10 so as to close it, the protruding ridge 21a is fitted and locked in the concave ridge 13 and the cover 2 is
Is attached so as to cover the opening surface 10.

In other words, even when the worker is in a poor position in a high place, the cover 2 can be easily attached to the box 1 with one hand, and the opening surface 10 of the box 1 and the cover The cover 2 can be easily removed from the box 1 by inserting a flathead screwdriver or the like between the body 2 and prying.

[0010]

However, in the electric wire connection box disclosed in Japanese Patent Application Laid-Open No. 9-261819 and the like, and in the electric wire connection box shown in FIGS. 3 and 4, the cover is fitted to the box. There has been a problem that the lid is easily detached from the box due to variations in the combined dimensions or plastic deformation due to repeated attachment and detachment of the lid to and from the box.

[0011] In addition to the above-described electric wire connection box, there is a conventional electric wire connection box in which the opening surface of the box body is covered with a lid and fixed simply by screwing. When working in a posture with a poor posture at a high place, there is a problem that it takes time and effort to insert a screw into a screw hole and screw it in.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to enable a lid to be easily attached to a box even when working at a high place, and ,
An object of the present invention is to provide an excellent electric wire connection box that does not become loose and the lid is easily detached even when the lid is repeatedly attached to and detached from the box.

[0013]

According to the present invention, in order to solve the above-mentioned problems, according to the first aspect of the present invention, an insertion hole is provided in a box having an opening surface to which a lid is detachably attached. In the electric wire connection box for connecting or branching the electric wire introduced from the insertion hole in the box body, an engaging portion is provided on a side surface of the box body, and a screw hole is provided on an opposite side surface of the side surface, The lid has a locking portion that locks with the engaging portion of the box, and a screw stopper that overlaps a screw hole of the box and that can screw a screw foot screwed into the screw hole from the side. And a part are provided.

According to a second aspect of the present invention, the distal end of the screwing portion is bent outward.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An electric wire connection box according to an embodiment of the present invention will be described below in detail with reference to FIGS. FIG. 1 is an exploded perspective view showing the electric wire connection box. 2A and 2B are explanatory diagrams showing the electric wire connection box. FIG. 2A is a right side view, FIG. 2B is a plan view, and FIG. 2C is a left side view. In addition, the same code | symbol is attached | subjected to the part equivalent to the conventional wire connection box demonstrated using FIG. 3 and FIG. 4 in the prior art.

As shown in FIG. 1 and FIG. 2, the box 1 of the electric wire connection box is a box-shaped box made of sheet metal having a substantially square shape in plan view, and has an opening surface 10 on the lower surface side. In the electric wire connection box shown in FIG. 1, three side surfaces of each side surface of the box body 1 correspond to insertion holes for connecting a conduit (not shown) and inserting electric wires and the like. Each has a round knockout hole 11. The other one side surface of the box 1 is used to connect a wire gutter (not shown) and insert an electric wire or the like.
A notch-shaped groove 12 corresponding to the insertion hole is provided.

An engaging hole 15 corresponding to an engaging portion is formed on one side of a pair of opposing sides adjacent to the side having the groove 12, and a screw hole 16 is formed on the other side. Are drilled. The engagement hole 15 is a horizontally long rectangular through hole near the opening surface 10 pierced at one corner of the side surface. The screw hole 16 is formed at a substantially diagonal position of the engagement hole 15 on a side surface facing the side surface at which the engagement hole 15 is formed. A screw 17 is screwed into the screw hole 16. This screw 1
The tip of the screw foot of No. 7 is subjected to a screw crushing process or the like, which prevents the screw 17 from dropping out and makes the screw hard when the screw is excessively loosened. FIG.
2 and FIG. 2, reference numeral 14 denotes a wire gutter connection portion having a U-shaped cross section. The wire gutter connecting portion 14 has spot welding margins 14a, 14a provided by bending and opening the wire gutter connecting portion 14.
It is welded and fixed to the box 1.

The lid 2 is a substantially square plate having a size just covering the opening 10 of the box 1. The lid 2 is detachably attached so as to close the opening surface 10 of the box 1. The lid 2 is provided with six positioning pieces 20, a hook 22 corresponding to a locking portion, and a screwing portion 23 on a peripheral edge. That is, the pair of opposing sides has the positioning pieces 20, 20 near both ends, respectively, and the interval between the positioning pieces 20, 20 is wider than the width of the wire gutter connecting portion 14. Further, one of the opposing sides of the other pair includes a positioning piece 20 near one end and a hook 22 near the other end, and the other includes a positioning piece 20 near one end and a screwing portion 23 near the other end. Is provided. The hook 22 and the screwing portion 23 are provided at substantially diagonal positions.

Incidentally, each positioning piece 20 is bent and raised substantially at right angles to the surface of the lid 2. Hanging claw 22
Is bent and raised substantially at a right angle to the surface of the lid 2, and the hook claw tip 22 a, which is the distal end thereof, is further bent inward so as to be substantially parallel to the surface of the lid 2. The screwing portion 23 has a screw groove portion 23a at the center and is bent and raised substantially at a right angle to the surface of the lid 2. It is bent outward so as to be substantially parallel. Further, the groove width of the screw groove portion 23a is set to such a width that the screw foot of the screw 17 can be just inserted.

Therefore, in the electric wire connection box configured as described above, the lid 2 can be attached to the box 1 as follows. That is, the box 1 is fixed to a building material or the like at a high place, a wire gutter (not shown) or a conduit (not shown) is connected to the box 1, and an electric wire is introduced. Therefore, first, the screw 17 is fully loosened, and the hook claw tip 22a of the hook 22 is inserted into the engaging hole 15 of the box 1 from the outside and hooked. After that, the lid 2 is pressed against the opening surface 10 of the box 1 while the six positioning pieces 20 are used as guides and the hooks 22 hooked on the engagement holes 15 are rotated about the fulcrum.

Then, since the screw foot of the screw 17 is exposed from the outer surface of the box 1 longer than the protrusion W of the tip 23b of the screwed portion, the screw foot of the screw 17 can be inserted into the screw groove 23a. The opening surface 10 of the box 1 is closed by the lid 2. Then, if the screw 17 is tightened with a screwdriver, the opening surface 10 of the box 1 can be covered with the lid 2 firmly.

If the opening face 10 of the box 1 is the lower face, the screw head of the screw 17 is connected to the tip 2 of the screwing portion.
3b, the width of the screw groove 23a is smaller than the width of the screw head of the screw 17, so that the lid 2 does not open the opening surface 10 of the box 1 and the lid 2 is The holding face may be released, and if the screw 17 is firmly tightened with the hand holding the screwdriver, the opening 1
Thus, the lid 2 can be firmly covered at 0.

FIG. 2 shows a state in which the lid 2 is firmly covered on the opening surface 10 of the box 1. From FIG. 2, it is specifically understood that the lid 2 is covered on the opening surface 10 of the box 1,
It can be understood that the above-described wire connection box has the following first to sixth effects.

That is, in the above-described electric wire connection box, the screw 17 is screwed into the box 1 in advance, so that the screw 17 can be screwed into the screw hole 16 in a poor working posture at a high place. The first operational effect is that the cover 2 can be easily screwed and fixed to the opening surface 10 of the box 1 without being screwed one by one. The hook claw tip 22a of the hook 22 is the cover 2
By being bent inward so that it is almost parallel to the surface, even when working in poor posture at high altitudes,
The second is that the lid 2 can be easily suspended from the box 1 with one hand.
It has the effect of.

Further, the screwing portion 23 having the screw groove portion 23a through which the screw foot of the screw 17 can be inserted from the side allows the screwing allowance to be reduced even if the screw 17 is screwed into the box 1 in advance. There is a third operational effect that it can be ensured. Further, since the tip 23b of the screwing portion 23 of the screwing portion 23 is bent outward so as to be substantially parallel to the surface of the lid 2, the opening surface 10 of the box body 1 is used with the lower surface. Even in this case, even if the screw 17 is slightly loosened, the head of the screw 17 is caught on the tip end 23b of the screwing portion and the lid 2 cannot open the opening surface 10 of the box 1, so that the posture at a high place is poor. Even in the work in the state, there is a fourth operational effect that the screw can be firmly tightened with one hand.

Furthermore, the hook claw tip 22a of the hook 22
Can be locked in the engagement hole 15, so that only one screw 17 needs to be screwed in to cover and fix the opening surface 10 of the box 1 with the lid 2. There is a fifth operational effect that the number of man-hours for screwing work in a state where the posture at the place is poor can be reduced. Furthermore, while the cover 2 is covered and fixed to the opening surface 10 of the box 1, there is no place using elastic deformation. And the sixth operation and effect that the cover body does not easily come off.

The present invention is not limited to the electric wire connection box of the above-described embodiment, and the shape and number of the insertion holes 11 and 12 for inserting electric wires are arbitrary, and The shape of the claw 22 and the projection allowance W of the screwing portion tip 23b
Can be changed as appropriate.

[0028]

According to the first aspect of the present invention, a screw is screwed to a box in advance, and the cover is screwed without removing the screw screwed to the box. Since the screwing allowance is ensured, the lid can be easily and firmly screwed and attached to the box with one hand, so that it is suitable for work in a poor posture at high altitudes and In contrast, even when the lid is repeatedly attached and detached, an excellent electric wire junction box can be provided that does not become too sweet and the lid is easily detached.

According to the second aspect of the present invention, in addition to the effects of the first aspect of the present invention, even if the opening surface of the box body is a lower surface or the screws are slightly loosened. Because the lid cannot open the opening of the box, it is suitable for applying the lid to the opening of the box when the posture is poor at high altitudes. The present invention has an effect that an excellent electric wire connection box can be provided.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an electric wire connection box according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing the electric wire connection box.

FIG. 3 is an explanatory view showing a box body of a conventional electric wire connection box.

FIG. 4 is an explanatory view showing a cover of a conventional electric wire connection box.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Box 10 Opening surface 11 Insertion hole 12 Insertion hole 15 Engagement part 16 Screw hole 17 Screw 2 Lid 22 Lock part 23 Screw stop part

Claims (2)

[Claims] 1. An electric wire connection box, wherein an insertion hole is provided in a box having an opening surface to which a lid is detachably attached, and connection or branching of an electric wire introduced from the insertion hole is performed in the box. An engaging portion is provided on a side surface of the box, and a screw hole is provided on a side surface facing the side surface, and the lid body includes:
A locking portion for locking to the engaging portion of the box, and a screwing portion that overlaps a screw hole of the box and allows a screw foot screwed into the screw hole to be inserted from the side. An electric wire connection box, characterized in that: 2. The electric wire connection box according to claim 1, wherein a tip end of the screwing portion is bent outward.