JPH11275734A - A single snap-in box cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the screwing operations in an installation work, wherein wiring appliances for building are attached to a number of box covers and save or reduce the lead time of the attachment operations of wiring appliances, lighting appliances, etc., in an electrical construction. SOLUTION: A coating margin 3 is made to protrude on a front side along the inner circumference of a center opening 2 formed in the synthetic resin molded plate 1 of a box cover. Appliance attachment blocks 4 and 4 are integrally formed on both the end parts of the coating margin 3. Rectangular recesses 5 and screw insertion through holes 6 are formed in the rear parts of the attachment blocks 4 and 4. Holding grooves 8 for rectangular flat springs 7 are formed along the inner circumference of the through holes 6 at the boundaries between the through-holes 6 and the recesses 5, to hold the outer circumferences of the rectangular flat springs 7 with the grooves 8. Two parallel cut parts 9 and 9 and facing tongues 10 and 10, to which tendencies of bending toward the inside of the rectangular recess 5 are given are formed in the center part of each flat spring 7. The facing cut ends 10' and 10' of the facing tongues 10 and 10 are retained with the screw threads 11' of an attachment screw 11 by the elastic forces of the tongue 10 and 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of mounting wiring equipment, lighting equipment, etc., in a mounting box for equipment, by interposing between the box and a finishing board for fixing the above-mentioned equipment, or for mounting columns, walls, etc. Box cover (for electric conduit) to be attached to the box buried in the concrete frame to fix the equipment
The present invention relates to a screw hole for attaching an inner frame for mounting an instrument to a central opening of (JIS-C8339-1981).

[0002]

2. Description of the Related Art Conventionally, a screw hole for mounting an instrument of the above-mentioned box cover has a female screw hole (M4) screwed into a mounting screw of a middle frame for mounting an instrument, and a box cover (JIS-C8339-).
1981) are provided at both ends of the opening. Therefore, in order to fix the instrument supporting middle frame to the box cover fixed to the wall or screwed to the buried box, the screw (screw) is screwed into the screw hole of the box cover with a screwdriver, so that the instrument (for example, outlet) is Since the supported inner frame is fixed to the box cover, there is a problem that the screwing operation requires time and labor, and it is difficult to shorten the construction period.

[0003]

SUMMARY OF THE INVENTION The present invention simplifies the work of screwing screws into a box cover, which is used innumerably for building wiring equipment, and installs wiring equipment, lighting equipment, etc. in electrical work. The purpose is to save labor or shorten the construction period.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, according to the present invention, a coating margin is projected on the front side along the inner periphery of a central opening formed in a synthetic resin molded plate, and both ends of the coating margin are provided. The device mounting block is provided integrally with the coating allowance in the portion, a rectangular concave portion is formed on the back surface of the mounting block, a screw insertion through hole communicating with the concave portion from the front is formed, and a boundary between the through hole and the concave portion is provided. A rectangular spring plate holding groove is formed along the inner periphery of the portion, the outer peripheral portion of the rectangular spring plate is held in the groove, and two parallel cuts are made in the center of the spring plate along the long side of the rectangular concave portion. And forming a facing tongue by cutting a longitudinal central portion between the parallel cuts, and imparting a bending habit toward the inside of the rectangular recess to the facing tongue, thereby opposing cutting of the facing tongue. Wantater whose end is engaged by the elasticity of the tongue in the spiral groove of the mounting screw inserted from the through hole. Chi box cover opposite the cutting edge is constituted by a one-touch box cover of the first invention described which are formed in a V-shape, respectively.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A substantially elongated rectangular opening 2 is formed in the center of an insulating synthetic resin molded plate 1, and a coating 3 (wall priming mortar 12) is formed on the front side along the inner periphery of the opening 2.
And so on.

The molded plate 1 is fixed to the opening of the box 13 with screws, and wiring is introduced into the box 13 through the side circular hole 14 of the box 13, and the box 13 is formed of a concrete frame or a heat insulating wall or a pillar. Buried in etc.
Open on its surface.

At the upper and lower ends of the center of the coating 3, instrument mounting blocks 4, 4 are provided integrally with the coating 3 and the forming plate 1, and rectangular recesses 5, 5 are formed on the back surfaces of the blocks 4, 4 respectively. Then, screw insertion through holes 6, 6 communicating with the recesses 5, 5 from the front are formed.

A holding groove 8 of a rectangular spring plate 7 is formed along the inner periphery of the boundary between the through holes 6, 6 and the recesses 5, 5, and the outer periphery of the rectangular spring plate 7 is held in the groove 8. .

In the spring plate 7 thus formed, two parallel cuts 9, 9 along the long sides 5 ', 5' of the rectangular recess 5 are formed in the spring plate 7, and between the parallel cuts 9, 9 are formed. Are cut 10 ', 10' at the center of the tongue to form opposing tongues 10, 10.

The opposed tongues 10, 10 impart a bending tendency toward the inside of the rectangular recess 5 as shown in FIGS. 1 (b) and 2 (a). Spring plate 7 as shown in
The opposing tongues 10 and 10 are raised by imparting a curving habit to the rectangular spring plate 7, and both short sides 10 "and 10" of the rectangular spring plate 7 are formed.
2B, the opposite tongues 10 and 10 are bent toward the inside of the rectangular concave portion 5 by bending and inserting the orthogonal tongues 8 'and 8' formed in the deep portion of the holding groove 8 as shown in FIG. It can be inclined to give a bending habit, and the orthogonal groove 8 ',
Without providing the 8 ', the opposing tongue pieces 10 and 10 can be bent and inclined to one of the spring plates 7 in advance to have the bending habit.

The opposite cut ends 10 'of the opposite tongues 10, 10;
10 'is a V-shaped (illustrated), each having a substantially diamond-shaped notch c.
Other arc-shaped or other cut ends 10 ', 1
It can be 0 '.

The cut ends 10 'and 10' are inserted into the spiral groove 11 'of the mounting screw 11 of the appliance 15 (outlet or the like) inserted through the through hole 6 on the front side by the elasticity of the opposed tongue pieces 10 and 10. It is formed so as to engage.

Therefore, the mounting frame 1 supporting the device 15
At the upper and lower ends of 6, mounting screws 11, 1 are passed through oblong holes 17, 17 pierced at positions corresponding to the screw insertion through holes 6, 6.
1 is a screw insertion through hole 6 at the front of the mounting block 4, 4;
6, the screw 11, 11 slides, and its tip is directed to the opening of the concave portion 5 through the notch c between the opposing cut ends 10 ', 10'. Open the cut ends 10 ′, 10 ′ of the screws 11, 11, and the screws 11, 11
It stops between the cut ends 10 ', 10' until 1 ", 11" hits the above-mentioned oblong holes 17, 17.

In this state, the opposing cut ends 10 ', 10' of the screws 11, 11 bite into the spiral grooves 11 'of the screws 11, 11 by the resilience of the opposing tongues 10, 10, and are held in a non-return state. That is, the tool 15 is simply pushed (without screwing) into the screw insertion through-holes 6, 6 of the blocks 4, 4 from the oblong holes 17, 17 by hand in the direction of arrow a.
Further, the mounting frame 16 can be supported by the blocks 4 and 4 of the synthetic resin molded plate 1 (the state is shown in FIG. 4).

When the mounting frame 16 is to be removed from the blocks 4, 4, the screws 11, 11 can be reversed by a screwdriver to remove the screw engagement between the screws 11, 11 and the opposing cut ends 10 ', 10'.

In FIG. 3, reference numeral 18 denotes a decorative plate, 19 denotes an exposure opening of the appliance 15, 20 denotes a through hole for mounting the molded plate 1,
Reference numeral 21 denotes the screw holes, reference numeral 20 'in FIG. 4 denotes mounting screws, and reference numeral 22 denotes decorative paint.

[0017]

Since the present invention is constructed as described above, the screw insertion of the above-mentioned block at the central opening of the synthetic resin molded plate fixed to the surface of the box by screws at the opening of the box is carried out. The effect that the tool mounting frame can be instantaneously supported on the above-mentioned forming plate (box cover) by the screw just by pushing it into the hole through the through hole of the tool mounting frame and the mounting time of the tool mounting frame can be shortened. There is.

[Brief description of the drawings]

FIG. 1 (a) is an enlarged vertical sectional view of an instrument mounting block according to the present invention. (B) The figure is an enlarged vertical sectional view of the instrument mounting block on which a rectangular spring plate is mounted.

FIG. 2 (a) is a plan view along the line AA in FIG. 1 (b). FIG. 1B is a rear view taken along line BB in FIG.

FIG. 3 is a perspective view of a state before assembly of a synthetic resin molded plate.

FIG. 4 is a partial longitudinal sectional view of a used state of a synthetic resin molded plate.

FIG. 5 is a front view of the molded plate.

FIG. 6 is a front perspective view of the molded plate.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 synthetic resin molded plate 2 central opening 3 coating 4 tool mounting block 5 rectangular recess 6 screw insertion through hole 7 rectangular spring plate 8 holding groove 9 parallel cut 10 facing tongue piece 10 'facing cutting end 11 mounting screw 11' spiral groove

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[Procedure amendment]

[Submission date] March 29, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 1

[Correction method] Change

[Correction contents]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction contents]

[0004]

In order to achieve the above object, the present invention is buried in a concrete body or the like,
A wiring introduction box having an opening;
A coating margin is projected on the front side along the inner periphery of the central opening formed in the molding plate, and an appliance mounting block is coated on both ends of the coating margin and the molding is performed. Provided integrally with the plate , forming a rectangular recess on the back of the mounting block, drilling a screw insertion through hole communicating from the front to the recess,
A holding groove for a rectangular spring plate is formed along the inner periphery of the boundary between the through hole and the concave portion, and the outer peripheral portion of the rectangular spring plate is held in the groove. 2 along the side
Forming parallel cuts in the strip, cutting the longitudinal central portion between the parallel cuts to form opposing tongues, and imparting the opposing tongues with a bending tendency toward the interior of the rectangular recess; The first cut-off end of the one-touch box cover is formed in a V-shape so that the opposite cut end of the piece is engaged with the spiral groove of the mounting screw inserted from the through hole by the elasticity of the tongue. It is constituted by the one-touch box cover according to the invention.

Claims (2)

[Claims] 1. A coating margin is projected on the front side along the inner periphery of a central opening formed in a synthetic resin molded plate, and an instrument mounting block is provided integrally with the coating margin at both ends of the coating margin. A rectangular recess is formed on the back surface of the mounting block, a screw insertion through hole communicating with the recess from the front is formed, and a holding groove of a rectangular spring plate is formed along an inner periphery of a boundary between the through hole and the recess. The groove is formed to sandwich the outer peripheral portion of a rectangular spring plate, and two parallel cuts are formed in the center of the spring plate along the long side of the rectangular recess, and the central portion in the longitudinal direction between the parallel cuts is formed. A cutting screw is formed by cutting the opposing tongue, and the opposing tongue is imparted with a bending tendency toward the inside of the rectangular recess. A one-touch box cover adapted to engage with the groove by the elasticity of the tongue. 2. The one-touch box cover according to claim 1, wherein the opposing cut ends are each formed in a V-shape.