JPH07193946A - Fixing structure for frame of embedded box - Google Patents

Abstract

PURPOSE:To provide a fixing structure for the frame of an embedded box which the workability can be enhanced when the frame is fixed to the box body. CONSTITUTION:The fixing structure comprises a box body 1 having one open side provided closely with a (internally threaded) tightening part 2, a frame and a switch being fixed to the opening of the box body, for example, a fixing screw for fixing the frame to the box body. The tightening part 2 comprises a bottom face part 3, a wall part 4 and a spring part 5 and has substantially C-shaped cross-section with a hole 3a for passing the screw through the bottom face part. The spring part is engaged, at the front end part thereof, with the screw and the between the front end parts (slit) 5c is enlarged elastically up to the maximum diameter of the fixing screw.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting frame fixing structure for an embedded box.

[0002]

2. Description of the Related Art Conventionally, an embedded box has often been used to install a switch or the like on a wall or the like. The embedded box has a mounting frame and a box main body as main components, a switch and the like are attached to the mounting frame, and the mounting frame is fixed to the box main body with a mounting screw.

[0003]

In the above-mentioned embedded box, when the mounting screw is long, or when the box body is deeply mounted in the wall, it is necessary to rotate the mounting screw many times for fastening. The construction was troublesome.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a mounting frame fixing structure for an embedded box, which has improved workability when fixing the mounting frame to the box body. It is in.

[0005]

In order to solve such a problem, the mounting frame fixing structure for an embedded box according to claim 1 is a box body having a one-sided opening and a box body having a fastening portion near the opening edge. A mounting frame that is fixed to the opening of the box body by mounting a switch, etc., and a mounting screw that engages with the fastening portion of the box body to fix the mounting frame to the box body. In the mounting frame fixing structure of the embedded box, the fastening portion of the box body is formed by a female screw whose inner diameter can elastically expand to the maximum diameter of the mounting screw.

According to a second aspect of the present invention, there is provided a mounting frame fixing structure for an embedded box, wherein the female screw according to the first aspect has a substantially C-shaped cross section having a bottom portion, a standing wall portion and a spring portion. An insertion hole through which a mounting screw is inserted is provided in the bottom surface portion, the bottom surface portion is provided at the opening side of the box body, and the tip portion of the spring portion engages with the mounting screw.

Further, in the mounting frame fixing structure for an embedded box according to a third aspect, the female screw according to the second aspect is configured such that the spring portion has a slit cut out from the tip thereof.

Further, the mounting frame fixing structure of the embedding box according to the fourth aspect is configured such that the insertion hole according to the second or third aspect is formed in an oval shape.

According to a fifth aspect of the present invention, there is provided a mounting frame fixing structure for an embedded box, wherein the female screws according to the first to fourth aspects are formed in a multi-layer structure.

[0010]

According to the structure of claim 1, if the mounting screw is inserted when the mounting frame is fixed to the box body, the inner diameter of the female screw of the fastening portion of the box body is elastic up to the maximum diameter of the mounting screw. Extend to. Therefore, it is possible to insert it to the predetermined position of the fastening portion without rotating the mounting screw.

According to the second aspect of the present invention, in addition to the effect of the first aspect, the positioning of the mounting screw is performed by passing the mounting screw through the insertion hole, and the tip of the spring portion is engaged with the mounting screw. Together, they function as female threads, and the insertion hole and the spring portion are integrally formed.

Further, according to the third aspect of the invention, in addition to the effect of the second aspect, since the cross-sectional area of the spring portion is small, when the mounting screw is inserted, it is more elastic up to its maximum diameter. It is easy to expand to.

According to the structure of claim 4, in addition to the effect of claim 2 or 3, the mounting screw can be inserted through any position of the oval insertion hole.

According to the structure described in claim 5, in addition to the effects of claims 1 to 4, the fastening load of the mounting screw can be received by the spring portion of the multilayer structure.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. The embedded box has a box body having a fastening portion, a mounting frame, and a mounting screw as main constituent members.

Reference numeral 1 denotes a box body, which has a box shape with one opening and is made of a metal material or the like. The opening 1a is provided with protruding pieces 1d, 1d having through holes 1c through which mounting screws described later can be inserted from the upper ends of the side walls 1b, 1b.

2 is a female screw which is a fastening portion,
It is to be screwed with a mounting screw. Female thread 2 is on the bottom 3
It is formed by a sheet metal having a substantially C-shaped cross section having a vertical wall portion 4, a spring portion 5, and 5, and a protruding piece 1d of the box body 1.
Further, the bottom surface portion 3 is externally inserted so as to be located on the opening side of the box body 1. The bottom part 3 communicates with the through hole 1c,
An insertion hole 3a through which a mounting screw can be inserted is provided. Further, the spring portions 5, 5 are such that the tip end portions 5a, 5a thereof engage with the mounting screws, and the spring portions 5, 5 spread slightly outward. A slit 5c having a circular hole 5b whose inner diameter can elastically expand to the maximum diameter of the mounting screw is provided between the tip portions 5a, 5a.

Reference numeral 6 denotes a mounting frame for mounting a switch or the like to close the opening 1a of the box body 1 and formed of a substantially flat metal or resin material. Mounting frame 6
Mounting holes 6a, 6a through which mounting screws can be inserted are provided at the end portions of.

Reference numeral 7 is a mounting screw, which includes a male screw 7a and a screw head 7b.
The mounting frame 6 is fixed to the box body 1 by using the above.

The operation of the above arrangement will be described below. First, the mounting screw 7 is inserted into the female screw 2 through the mounting hole 6a of the mounting frame 6. For female screw 2, insert hole 3a,
After passing through the through hole 1c, the mounting screw 7 is inserted while pressing and widening the slit 5c without rotating until the screw head 7b contacts the mounting frame 6. Next, slightly rotate the mounting screw 7 in the fastening direction so that the tip 5a of the spring part 5 is
It bites into the male screw 7a of 7 and the mounting frame is fastened to the box body 1. Therefore, the attachment frame 6 can be easily attached to the box body 1 in a short time.

By the way, since the spring portion 5 has the protruding piece 1d of the box body 1, it does not bend inside the female screw 2 and can be fastened with an appropriate strength. Further, even if the mounting screw 7 has a slightly different screw diameter, the same quick-connect nut can be used.

Incidentally, the circular hole 5b of the slit 5c may be omitted, and a slit having a constant width may be used. Also, the protruding piece 1d
The mounting position of the mounting frame 6 can be finely adjusted by making the through hole 1c of the ellipse oval.

Next, the second and third embodiments of the present invention will be described with reference to FIG.
And FIG. 6 will be described. These are front views of the spring portion 5 of the female screw 1, and slits 5d, 5d, ... Cut out from the circular hole 5b of the tip portion 5a of the spring portion 5 are provided.

With this structure, the spring portion is
The cross-sectional area of 5 is reduced, making it easier to insert the mounting screw 7 into the spring part 5.

Next, a fourth embodiment of the present invention will be described with reference to FIGS.
It will be described based on. In this embodiment, a female screw is formed integrally with the box body 1.

Reference numeral 8 is a female screw which is a fastening portion,
It is to be screwed with the mounting screw 7. Female screw 8 is on the bottom
It is formed of a sheet metal or the like having a substantially C-shaped cross section having 9 and a standing wall portion 10 and spring portions 11 and 11, and is provided integrally with the box body 1 by bending the side wall 1b of the box body 1. The bottom surface portion 9 is provided with an elliptic insertion hole 9a through which the mounting screw 7 can be inserted. Further, the spring portions 11, 11 are such that the tip portions 11a, 11a thereof are engaged with the mounting screw 7.
The spring parts 11 and 11 spread slightly outward. A slit 11c having a circular hole 11b whose inner diameter can elastically expand to the maximum diameter of the mounting screw 7 is provided between the tip portions 11a, 11a.

With this structure, it is possible to reduce the number of parts and form the female screw 8.
Also, by making the insertion hole 9a oval, it is possible to finely adjust the mounting of the mounting frame 6.

Next, a fifth embodiment of the present invention will be described with reference to FIG. This embodiment is the same as the first embodiment except that the female screw has a multi-layer structure.

Reference numerals 12 and 13 are female screws which are fastening portions, and the female screw 12 is formed to be slightly smaller so that it can be inserted into the female screw 13. The structure of each female screw 12, 13 is the same as that of the first embodiment, and the tip portions 14a, 15a of the spring portions 14, 15 are
It is engaged with the male screw 7a of the mounting screw 7. Also, female screw 12
The projection piece 1d of the box body 1 is inserted inside the box.

With this structure, the fastening load of the mounting screw 7 is received by both the tip portions 14a and 15a, so that the fastening can be performed with a large fastening force.

The multilayer structure of the female screw is not particularly limited to two layers. Next, a sixth embodiment of the present invention will be described.
It will be described with reference to FIGS. In this embodiment, a female nut is provided with a moving nut.

Reference numeral 16 is a female screw which is a fastening portion,
It is composed of a nut storage stand 17 and a moving nut 21.
The nut storage stand 17 is formed of a generally U-shaped sheet metal having a bottom surface portion 18, an upright wall portion 19 and an upper surface portion 20, and the box body.
It is provided integrally with the box body 1 by bending the side wall 1b of 1. The bottom surface portion 18 is provided with an oval insertion hole 18a into which the mounting screw 7 can be inserted. Also,
The upper surface portion 20 has a substantially U-shape having locking walls 20a, 20a at its end, and has an oval second insertion hole 20c into which a mounting screw 7 can be inserted, in its connecting piece 20b. ing. Also,
The moving nut 21 is a flat plate having a screw portion 21a that is screwed with the male screw 7a of the mounting screw 7, and its width is formed to a size that can be fitted between the locking walls 20a, 20a of the upper surface portion 20. ing.

The operation of the above arrangement will be described below. First, the mounting screw 7 is inserted into the female screw 16 through the mounting hole 6a of the mounting frame 6. With the female screw 16, the insertion hole 18a
After passing through, the mounting screw 7 is fastened to the screw portion 21a of the moving nut 21 while rotating in the fastening direction, and the mounting screw 7 is projected from the female screw 16 through the second through hole 20c. The moving nut
The 16 is prevented from rotating by contacting the locking walls 20a, 20a. With this structure, the mounting frame 6
Fine adjustment of the mounting position of is easy.

[0034]

According to the mounting frame fixing structure for an embedded box according to claim 1, if the mounting screw is inserted when fixing the mounting frame to the box body, the inner diameter of the female screw of the fastening portion of the box body is mounted. Elastically expands to the maximum diameter of the screw. Therefore, since the mounting screw can be inserted to a predetermined position of the fastening portion without rotating, the workability in mounting the mounting frame on the box body is improved.

According to the mounting frame fixing structure of the embedding box of the second aspect, in addition to the effect of the first aspect, the mounting screw is passed through the insertion hole to thereby position the spring, and the tip portion of the spring portion is mounted. In addition to engaging the screw and acting as a female screw, the insertion hole and the spring part are integrally formed, so that the mounting screw can be easily called in, and the mounting screw can be fastened with a small number of rotations. Easy to manufacture.

According to the mounting frame fixing structure of the embedding box of the third aspect, in addition to the effect of the second aspect, since the cross-sectional area of the spring portion is small, when the mounting screw is inserted, up to its maximum diameter. Further, since it is elastically expandable, the mounting screw can be easily inserted in a short time.

According to the mounting frame fixing structure of the embedding box of the fourth aspect, in addition to the effect of the second or third aspect, the mounting screw can be inserted into any position of the oval insertion hole. It becomes possible to finely adjust the mounting position of the mounting frame.

According to the mounting frame fixing structure of the embedding box of the fifth aspect, in addition to the effects of the first to fourth aspects, the fastening load of the mounting screw can be received by the spring portion of the multi-layer structure. It is possible to increase the fastening force of.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embedding box and a female screw according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the embedding box.

FIG. 3 is a sectional view of the female screw.

FIG. 4 is a front view of the spring portion.

FIG. 5 is a front view of a spring portion showing a second embodiment of the present invention.

FIG. 6 is a front view of a spring portion showing a third embodiment of the present invention.

FIG. 7 is a sectional view of a female screw showing a fourth embodiment of the present invention.

FIG. 8 is a perspective view of the embedding box and female screw.

FIG. 9 is a sectional view of a female screw showing a fifth embodiment of the present invention.

FIG. 10 is a perspective view of an embedding box and a female screw according to a sixth embodiment of the present invention.

FIG. 11 is a sectional view of the embedding box.

[Explanation of symbols]

 1 Box body 1a Opening 2 Female screw (fastening part) 3 Bottom part 3a Insertion hole 4 Standing wall part 5 Spring part 5a Tip part 5c Slit 6 Mounting frame 7 Mounting screw

Claims (5)

[Claims] 1. A box main body having a box-shaped one-sided opening and having a fastening portion near the opening edge, a mounting frame to which a switch or the like is attached and which is fixed to the opening of the box main body so as to close it. In a mounting frame fixing structure of an embedded box having a mounting screw that engages with a fastening portion of the box body for fixing the frame to the box body, the fastening portion of the box body has an inner diameter up to the maximum diameter of the mounting screw. A mounting frame fixing structure for an embedding box, characterized by being formed by an elastically expandable female screw. 2. The female screw has a substantially C-shaped cross section including a bottom surface portion, a standing wall portion, and a spring portion, and an insertion hole through which a mounting screw is inserted is provided in the bottom surface portion, and the bottom surface portion is a box body. The mounting frame fixing structure for an embedded box according to claim 1, wherein the mounting frame fixing structure is provided so as to be positioned on the opening side, and a tip end portion of the spring portion engages with the mounting screw. 3. The mounting frame fixing structure for an embedding box according to claim 2, wherein the female screw has a slit formed in the spring portion from the tip thereof. 4. The mounting frame fixing structure for an embedding box according to claim 2, wherein the insertion hole is formed in an oval shape. 5. The mounting frame fixing structure for an embedded box according to claim 1, wherein the female screw is formed in a multi-layer structure.