JP3380952B2 - Screw holding structure of wiring box - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiring box screw holding structure for detachably holding mounting screws inside a box body.

[0002]

2. Description of the Related Art Conventionally, as a wiring box which detachably holds a mounting screw in a box body, for example, there is one disclosed in Japanese Utility Model Publication No. 51-8477.

8 to 10, the wiring box 1
Is a holding portion 31 that holds the mounting screw 21 at a predetermined position on the bottom wall 7 of the box body 2 in a detachable manner along the surface of the bottom wall 7.
Are provided integrally. The holding portion 31 is made of synthetic resin and has a substantially U-shaped cross section, and is configured to elastically sandwich the shaft portion 22 of the screw 21 in the recess.

The wiring box 1 thus formed
At the time of installation work, the screw 21 held by the holding portion 31 is removed, the screw 21 is screwed into the boss hole 8 of the wiring box 1, and a wiring device mounting frame (not shown) is mounted.

[0005]

[Problems to be Solved by the Invention]
In the wiring box 1 disclosed in Japanese Patent Publication No. 1-8477, when the shaft portion 22 of the screw 21 is gripped and removed, the screw 22 has a head 23 and a bottom wall 7 of the box body 2 as shown in FIG. The shaft end is pulled up and removed using the contact portion with the surface as a fulcrum.
The head 23 of the screw 21 abuts the bottom wall 7 surface of the wiring box 1 because it is necessary to reduce the protruding amount of the holding portion 31 in order to avoid interference with wiring equipment in relation to the accommodation space inside. The shaft portion 23 is held in a state or a state close thereto.
And the bottom wall 7 are close to each other. That is, the screw 21 was held at a position close to the bottom wall 7 which is the inner part of the wiring box 1, and the picking margin of the screw 21 was small. For this reason, it was not easy to put a hand through the opening of the wiring box 1, grasp the screw 21 at the inner part, pull it up and remove it.

In order to solve these points, the holding portion 31
It is possible to reduce the clamping force of the screw 21 to facilitate the removal, but there is a problem that the screw 21 easily comes off due to vibration during transportation.

[0007] Therefore, an object of the present invention is to provide a screw holding structure for a wiring box in which the screws can be securely held and the screws can be easily removed.

[0008]

According to a first aspect of the present invention, there is provided a screw holding structure for a wiring box, which has a holding portion for holding the screw at a shaft portion along an inner bottom wall of the wiring box.
A tilting space is formed in the bottom wall below the one end of the screw so that the one end of the screw is pushed down to allow tilting so that the screw can be removed from the holding portion. This tilting space is formed by a through hole or a recess provided in the bottom wall, and one end of the screw is formed.
The other end of the screw by tilting into the tilting space.
A gripping space is formed below the part where the other end of the screw can be gripped.
It is made .

According to a second aspect of the present invention, there is provided a wiring box screw holding structure, wherein the wiring box according to the first aspect is provided with a tilt regulating portion for regulating a tilt amount of the screw into the tilt space.

According to a third aspect of the present invention, there is provided a wiring box screw holding structure, wherein the holding portion according to the first or second aspect is provided with a protrusion for locally sandwiching the screw shaft portion. is there.

[0011]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described below with reference to FIGS.

In the figure, the box body 2 of the wiring box 1 is made of synthetic resin and is formed in the shape of a box with one opening. The side wall 3 of the wiring box 1 is provided with a long hole 4 for attaching to a pillar or the like in the wall. A screw 21 is inserted into the long hole 4 from the inside of the box body 2 to form a pillar or the like. The wiring box 1 can be attached by screwing it on. Further, the other side wall 3 is provided with a knockout portion 5 and a wiring insertion hole 6. Boss holes 8 are formed in the upper and lower ends of the bottom wall 7 for mounting a wiring device mounting frame (not shown) using screws 21.

Further, a holding portion 11 having a mountain-shaped cross section is formed integrally with the box body 2 at the corner of the bottom wall 7 for holding the screw 21 used for the boss hole 8 until the time of construction. There is. The holding portion 11 is provided with two recesses to hold two screws 21 in the recess. However, in this embodiment, the holding portion 11 has a mountain-shaped cross section and holds two screws 21.
The number of held lines is not limited. The four side walls 12 of the concave portion of the holding portion 11 are provided with arc-shaped projections 13 that project toward the inner side so as to locally pinch the shaft portion 22 of the screw 21. There is. Further, the screw 21 is held at a predetermined distance from the holding portion 11.
A through hole 14 is formed in a lower position of the head 23 of the head 23, and a tilting space 15 is formed in the through hole 14. The peripheral portion of the through hole 14 on the side of the holding portion 11 is formed with an inclined surface 16 that is inclined downward. The protrusion 13 of the holding portion 11 is preferably provided near the through hole 14 so as to facilitate the tilting of the screw 21, as described later.

On the other hand, on the side opposite to the tilting space 15 of the holding portion 11, as shown in FIG. 5, when the screw 21 tilts, a holding space below the head portion 23 and the shaft portion 22 on the opposite side. 17 is formed.

Next, the screw holding and screw removing in the screw holding structure of the wiring box of the present embodiment constructed as described above will be described with reference to FIGS. 4 and 5.

First, in holding the screw 21 until the wiring device mounting frame is mounted, the screw 21 for mounting the wiring device mounting frame in the boss hole 8 has a holding portion at its shaft portion 22 as shown in FIG. It is clamped by the protrusion 13 of 11,
It is held in parallel along the surface of the bottom wall 7.

Next, in order to remove the screw 21 for mounting the wiring device mounting frame, the head 23 of the screw 21 is pressed with a finger and tilted downward with the projection 13 of the holding portion 11 as a fulcrum. Then, since the tilting space 15 by the through-hole 14 in the bottom wall 7 of the lower head 23 of the screw 21 is formed, prior to
The screw 21 enters the tilting space 15 beyond the surface of the bottom wall 7. When tilted to a certain angle, the bis 21 is the bottom of the <br/> shaft portion 22 is abutted against the inclined surface 16 of the through-hole 14, is prevented from further tilting. At this time, the other end of the screw 21 tilts upward, the gap between the shaft portion 22 and the bottom wall 7 is opened, and the gripping space 17 is formed below the shaft portion 22.
1, such a state easy to grip the end portion of the shaft portion 22 Runode can detachment Succoth grip the screw 21 in that state.

That is, in this embodiment, the screw 21 is
As is conventional, simply not picking up and removed while being held in a prone tilted state lifting bunch by that depresses the end. Therefore, it is possible to prevent the screw 21 from tilting too much and dropping into the box body 2 or the like to be lost due to the momentum when detaching, and it is possible to securely grasp and remove.

As described above, the screw holding structure for the wiring box of this embodiment has the screw 2 along the bottom wall 7 of the wiring box 1.
1 has a holding portion 11 for sandwiching the shaft portion 22, and a tilting space 15 that allows the screw 21 to tilt so that the screw 21 can be removed from the holding portion 11 has a tilt space 15.
It formed in the bottom wall 7 in the lower end portion of the screw 2
By tilting one end of 1 into the tilting space 15,
The other end of the screw 21 is located below the other end of the screw 21.
A gripping space 17 that can be gripped is formed .

Therefore, the screws 21 are held by the holding portion 11.
Can be securely held . At the time of removal of the screw 21, it rotates the other end one end of the screw 21 by pressing down the bottom to the top, gripping space while being held by the holding portion 11 17
Because There is formed, Ri of easily grip the screw 21, thereby facilitating removal operation. Then, it is also possible to prevent the lost by dropping the screws 21 by mistake.

Further, since the tilt restricting portion is formed by the inclined surface 16 at one peripheral edge of the through hole 14, it is possible to prevent the screw 21 from tilting more than a certain amount. As a result, the screw 21 can be more reliably held by the holding portion 11 during tilting during removal, so that the screw 21 drops and
Loss can be more reliably prevented.

Further, since the projecting portion 13 is formed on the holding portion 11 and the screw 21 locally holds the shaft portion 22 at the tip of the projecting portion 13, the screw 21 can be easily rotated.

In the above embodiment, the head 23 side of the screw 21 is held by the holding portion 11 so as to be tilted downward. However, as shown in FIGS.
Even when the shaft portion 22 side is held by the holding portion 11 so as to tilt downward, similarly, the end portion of the shaft portion 22 is inserted into the through hole 14, and the head portion 23 tilts upward and moves downward. Gripping space 1
Since 7 is formed, the screw 21 can be easily and surely removed.

In the above embodiment, the tilting space 1
5 is formed by the through hole 14, but when the plate thickness of the bottom wall 7 is large, a recess may be formed to a predetermined depth without penetrating the bottom wall 7. In this case, although the tilting amount of the screw 21 is limited, concrete does not enter when pouring the concrete, so that it can be applied to the wiring box 1 for burying concrete.

Further, in the above embodiment, the holding portion 11
Is formed at one corner of the box body 2, but the present invention is not limited to this and may be formed at a plurality of locations on the bottom wall 7.

Further, in order to make it easier to grip the screw 21, a through hole or a recess may be formed in the bottom wall 7 on the gripping space 17 side.

[0027]

As described above, the screw holding structure for a wiring box according to the first aspect of the present invention has the holding portion for holding the screw at the shaft portion along the inner bottom wall of the wiring box. In order to enable the screw to be removed, a tilting space is formed in the bottom wall portion below the one end of the screw so that the tilting space can be tilted by pushing the one end of the screw down to allow the one end to enter. The space is formed by a through hole or a recess provided in the bottom wall, and one end of the screw is
By tilting into the tilting space, the bottom of the other end of the screw
A gripping space is formed on one side so that the other end of the screw can be gripped.
It is those that. Therefore, the screw can be surely held by the holding portion, and at the time of removing the screw, one end of the screw is pushed downward, the through hole provided in the bottom wall is penetrated or the recess is made large, and the other end is enlarged upward. It can be tilted and a gripping space is formed below the other end of the screw.
Re Runode, different from the case of picking up as in the prior art, bi-
It is possible to tilt the sleeve and hold it easily, and it is possible to remove it from the holding portion very easily. And accidentally drop the screw
It can also be prevented from being lost.

According to a second aspect of the present invention, there is provided a wiring box screw holding structure, wherein the wiring box according to the first aspect is provided with a tilt regulating portion for regulating a tilt amount of the screw into the tilt space. Therefore, in particular, it is possible to prevent the screw from tilting more than a certain amount, and thereby, the screw can be more reliably held in the holding portion at the time of tilting of the detachment, so that the screw can be more reliably prevented from falling or being lost.

According to a third aspect of the present invention, there is provided a wiring box screw holding structure, wherein the holding portion according to the first or second aspect is provided with a protrusion for locally sandwiching the screw shaft portion. is there. Therefore, in particular, since the screw has the shaft portion locally clamped by the tip of the protrusion, the screw can be easily rotated at the time of removal.

[Brief description of drawings]

FIG. 1 is a perspective view showing a screw holding structure of a wiring box according to an embodiment of the present invention.

FIG. 2 is a perspective view of a main part of the wiring box shown in FIG.

FIG. 3 is a plan view showing a screw holding structure of a wiring box according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view of essential parts showing a state in which the screw of FIG. 1 is held.

5 is a cross-sectional view of an essential part showing a state in which the screw of FIG. 1 is tilted.

6 is a cross-sectional view of a main portion showing another holding state of the screw in the holding portion of FIG.

FIG. 7 is a cross-sectional view of essential parts showing a state in which the screw in FIG. 6 is tilted.

FIG. 8 is a plan view showing a conventional screw holding structure of a wiring box.

9 is a cross-sectional view taken along the line AA of FIG.

10 is a sectional view taken along the line BB of FIG.

[Explanation of symbols]

1 wiring box 7 bottom wall 11 holding part 13 Projection 14 through holes 15 Tilt space 16 inclined surface 17 gripping space 21 screws 22 Shaft

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H02G 3/08 H01H 9/02

Claims (3)

(57) [Claims] 1. A holding portion for holding a screw at a shaft portion along a bottom wall of an inner surface of a wiring box, and by pushing down one end portion of the screw so that the screw can be removed from the holding portion. one end intruded a and the tilting space tiltable formed in the bottom wall portion below the one end of the screw, the tilting space is formed by the hole or recess provided in the bottom wall, the bis By tilting one end of the
Grip the other end of the screw below the other end of the screw.
A screw holding structure for a wiring box, in which a possible gripping space is formed . 2. The screw holding structure for a wiring box according to claim 1, further comprising a tilting restricting portion for restricting a tilting amount of the screw into the tilting space. 3. The screw holding structure for a wiring box according to claim 1, wherein the holding portion is formed with a protrusion that locally holds the shaft portion of the screw.