JPH0715829A - Electric joint box - Google Patents

Abstract

PURPOSE:To provide an electric joint box which can be fixed easily to a wall board without requiring accurate alignment of fixing hole made in the wall board. CONSTITUTION:The electric joint box comprises a fixing flange 3 having a small annular part 10 to be fitted in a circular hole made in a wall board W and a counter fitting part 11 abutting on the periphery of the fixing hole 5, a supporting plate 2 for securing a receptacle 6 to the wall board W by holding the wall board W between the fixing flange 3 and the supporting plate 2, and a cover 4 being fitted to the fixing flange 3 while exposing the front of the receptacle 6.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an electrical connection box embedded in the wall of a building. More specifically, the present invention relates to an electrical connection box that allows a switch, a receptacle of an electrical outlet, or the like to be easily attached to an attachment target wall plate.

[0002]

2. Description of the Related Art As shown in FIG. 6, a conventional electric outlet 51, for example, has a box-shaped main body 52, a receptacle mounting plate 53, a frame body 54, a rectangular lid body 55, and a receptacle 56. It consists of The receptacle 56 is held in the vicinity of the front surface thereof by the receptacle mounting plate 53, and is arranged inside the main body 52 when assembled.

When such an electric outlet 51 is installed on the wall surface of a building or the like, it is performed, for example, in the following procedure (see FIG. 6). Incidentally, the wall of a recent building is generally formed by an inner wall IW and an outer wall EW which form a space S between them, but as an example, the electric outlet 51 has an inner wall IW.
It should be installed on the W side (so-called indoor side).

(1) First, the main body 52 is attached to the inner surface side of the outer wall EW when the inner wall IW is not installed. However, since the width of the space S varies, the main body 52
It is necessary to use a spacer 57 such as a plywood plate so that the front surface of the inner wall IW surface substantially matches the inner wall IW surface.

(2) Next, the pre-wired cable E for supplying power is connected to the receptacle 56, and the receptacle mounting plate 53 to which the receptacle 56 is fixed is attached to the main body 52.
Screw to.

(3) After that, since the inner wall IW is installed,
A rectangular opening H is formed in the inner wall IW so that the front surface of the main body 52 is exposed.

(4) Next, the frame 54 is screwed to the receptacle mounting plate 53 exposed from the rectangular opening H from the front side of the inner wall IW.

(5) Next, the lid 55 is fitted to the frame 54.

(6) Then, the plug insertion hole 56a of the receptacle 56 is exposed in the room through the opening 55a of the lid 55.

[0010]

As described above, since there are many steps for installing the conventional electric outlet 51, the labor cost in the equipment cost is extremely high. In particular, since the conventional electric outlet 51 is fixed to the outer wall EW, it is very difficult to form the rectangular opening portion that exposes the electric outlet 51 to the indoor side by accurately aligning it with the inner wall IW. There is a problem that it costs.

Further, there is a problem in that it is difficult to form the opening in the wall plate in a rectangular shape and the operation requires skill.

The present invention has been made to solve such a problem, and provides an electrical connection box which can be mounted very easily without requiring accurate positioning when forming a mounting hole in a wall plate. The purpose is to do.

[0013]

The electrical connection box of the present invention comprises: (a) a support plate to which an electrical connection member connected to an end of a cable suspended on the back side of a wall plate to be attached is fixed. And (b) a mounting flange having a small ring portion that can be fitted in a circular mounting hole formed in the wall plate to be mounted, and a pedestal portion that abuts a peripheral portion of the mounting hole, and (c) the mounting. The flange is provided with a cover that covers the electric connection member so as to expose the electric connection member, and the support plate and the mounting flange clamp the peripheral edge portion of the mounting hole, whereby the electric connection member is attached to the wall plate to be mounted. It is configured to be fixed to.

An electrical connection box according to another aspect of the present invention is (a) a support plate to which an electrical connection member connected to an end of a cable suspended on the back side of a wall plate to be attached is fixed, (B) a mounting flange having a small ring portion that can be fitted into a circular mounting hole formed in the wall plate to be mounted, and a pedestal portion that abuts the peripheral portion of the mounting hole; and (c) the mounting flange. An outer sandwiching plate that can be engaged is provided, and the support plate and the outer sandwiching plate are configured to clamp the peripheral edge portion of the mounting hole so that the electrical connection member can be fixed to the mounting target wall plate. There is.

The term "electrical connecting member" as used in the claims means a switch or a receptacle of an electric outlet.

[0016]

According to the electrical connection box of the present invention, (1) First, wiring is provided in the space between the inner wall and the outer wall of the building. A supporting plate to which an electrical connecting member such as a switch or a receptacle is fixed is attached to the end of the cable and suspended.

(2) Next, an inner wall or an outer wall (hereinafter, the inner wall is assumed to be attached to the inside of the room).
A circular mounting hole is drilled in. At this time, since the support plate is not fixed to the outer wall, it is not necessary to accurately position the attachment hole, and the support plate may be provided near the position where the support plate hangs down. Further, since the mounting hole is circular, a beautiful hole can be easily formed in a hand drill driving machine or the like with a circular saw blade (so-called hole saw) attached, and the inner wall is not damaged. The perforation may be performed before or after the installation of the inner wall.

(3) Next, a mounting flange is fitted into the mounting hole, and a hand is inserted through the central hole to support a support plate from the back side of the inner wall to abut the wall surface of the peripheral edge of the mounting hole. Fix the support plate provided with the electrical connecting member to the inner wall by pressing the support plate and the mounting flange at the peripheral edge of the mounting hole of the inner wall. (4) Then, attach the cover to the mounting flange. Then the installation work is completed.

According to the electrical connection box of the other aspect of the present invention, the steps (1) to (3) in the attachment of the electrical connection box of the above aspect are common work. 4) Fit the mounting flange into the mounting hole, put a hand through the center hole, support the support plate from the back side of the inner wall by abutting the support plate against the peripheral wall surface of the mounting hole, and screw the support plate to the mounting flange, for example. Then, the peripheral edge of the mounting hole of the inner wall is pressed to temporarily fix the support plate.

(5) Then, the outer holding plate is fitted so as to come into contact with the pedestal portion of the mounting flange, and then the support plate is screwed, for example, to sandwich the mounting hole peripheral portion of the inner wall and the mounting flange. The support plate is firmly fixed to the wall plate by applying pressure.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The electrical connection box of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a partially cutaway perspective view before assembly showing an embodiment of the electrical connection box of the present invention, and FIG. 2 is a partially cutaway perspective view showing the mounted state of the electrical connection box of FIG. 1, FIG. Is a perspective view showing an example of a blade for punching a mounting hole of an electric connection box, FIG. 4 is a partially cutaway perspective view before assembly showing an embodiment of an electric connection box of another aspect of the present invention, FIG. 5 is an explanatory view showing a method of fixing the receptacle in FIGS. 1 and 4.

In FIG. 1, reference numeral 1 is an electrical connection box, which comprises a support plate 2, an annular mounting flange 3 and a cover 4. A circular mounting hole 5 is provided in the mounting symmetrical wall plate (hereinafter, simply referred to as wall plate) W.

An electrical connection member (hereinafter, represented by a receptacle) 6 such as a receptacle or a switch of an electrical outlet connected to a terminal of the cable C is attached to the support plate 2, and a protective case 7 is further fitted. Is dressed. Locking protrusions 7a are formed on the upper and lower sides of the protective case 7, and they can be fixed with one touch by being fitted into the locking holes 2a provided in the support plate 2. Further, the protective case 7 is formed with a through hole 7b for inserting and fixing the end portion of the cable C of the receptacle 6 with one touch.

Further, the support plate 2 is provided with a finger insertion hole 8 into which a finger can be inserted and supported so that the support plate 2 can be supported by the finger when screwed to the mounting flange 3. Furthermore, a plurality of screw holes 9 are provided.

The mounting flange 3 includes a small ring portion 10 and a pedestal portion 1.
1, the small ring portion 10 fits into the mounting hole 5, the pedestal portion 11 abuts on the periphery of the mounting hole 5 of the wall plate, and the cover 4
It is for fitting. The small ring portion 10 is located at a position corresponding to the three pairs of screw holes 9 provided on the support plate 2 described above.
A through hole 14 having a rib 12 protruding toward the inside and through which a screw 13 penetrates is formed. In addition, in FIG. 1, the mounting flange 3 and the support plate 2 are screwed to each other with six screws 13, but the present invention is not limited to this, and if they can be firmly screwed, for example, It may be screwed with four screws.

As shown in FIG. 2, since the small ring portion 10 is only for fixing the mounting flange 3 in the mounting hole 5, its width T need not be the same as the thickness of the wall plate W. Absent. Rather, it is preferable to make it thinner because it can be attached regardless of the wall thickness.

On the other hand, 3 has a ring-shaped standing edge portion 15 projecting from the outer periphery of the pedestal portion 11 and covers the standing edge portion 15.
The appearance can be made beautiful by fitting. The cover 4 is formed so as to cover the vertical edge portion 15. For example, a protrusion 15a may be formed on the outer circumference of the upright edge portion 15, and a groove (not shown) that can be fitted into this groove may be provided on the inner circumference of the cover 4 for fitting.

However, in the present invention, the method of fitting the cover 4 is not particularly limited to the above, and an example of the procedure for attaching the electrical connection box configured as above to the wall plate will be described.

(1) First, a cable is laid in the space between the inner wall and the outer wall of the building. The end portion of the cable C is exposed, inserted into the connection hole of the receptacle 6 fixed to the support plate 2, and the support plate 2 is attached to the end portion of the cable C so that it hangs down in the space between the inner wall and the outer wall. .

(2) Next, as shown in FIG. 3, a circular saw blade (so-called hole saw) H with a drill blade D that is commonly used in the industry is used as a hand drill driver (not shown), etc. To the inner wall or outer wall (hereinafter, referred to as an inner wall on the assumption that it is mounted on the indoor side), and a circular mounting hole 5 having a diameter substantially the same as the outer diameter of the small ring portion 10 of the mounting flange 3 is drilled. Set up. Since the support plate 2 is not fixed to the outer wall but only hangs down in the space between the inner wall and the outer wall, the position of the mounting hole 5 formed in the inner wall does not need to be substantially aligned.
It is possible to pull in the support plate 2 by inserting a finger (or the whole hand) from the mounting hole 5. Moreover, since the mounting hole 5 is circular, a beautiful hole can be easily formed by the above-mentioned tool, and the inner wall is not damaged. The perforation may be performed before or after the installation of the inner wall.

(3) Next, the mounting flange 3 is attached to the mounting height 5.
And insert a hand through the hole in the center to support the support plate 2 from the back side of the inner wall by abutting the support plate 2 on the wall surface of the peripheral edge of the mounting hole,
The support plate 2 and the mounting flange 3 are fastened with six screws 13 so as to press the peripheral portion of the mounting hole of the inner wall. By doing so, the support plate 2 provided with the receptacle 6 can be firmly fixed to the inner wall.

(4) Next, attach the cover 4 to the mounting flange 3
And the mounting work is completed.

Next, FIG. 4 shows an electrical connection box 31 according to another embodiment of the present invention. The electrical connection box 31 is slightly different from the electrical connection box 1 shown in FIGS. That is, the outer holding plate 32 is newly provided. The mounting flange in FIGS. 1 and 2 is used as a so-called temporary fixing flange in the electrical connection box 31. Therefore, the mounting flange 33 in FIG. 4 is provided with only one pair of the tongue piece 12 and the through hole 14 for connecting the support plate 2 with the screw 13. Of course, in the present invention, the numbers of the tongue pieces 12 and the through holes 14 are not limited, but in the electrical connection box 31 of FIG. 4, one pair can sufficiently fulfill the role.

Further, in the case of this drawing, the outer holding plate 32
Is beautifully formed, the cover 4 as in FIGS. 1 and 2 is not particularly required. However, FIG. 4 is described for the purpose of showing another method of fitting the cover.

The outer holding plate 32 is a disk member having an exposure hole 32a for exposing the front side of the receptacle 6 (the side where the connection hole for connecting the electric socket is formed). A plurality of through holes 34 are formed on both sides of the exposed hole 32a of the outer holding plate 32 as shown in the drawing. The through hole 34 is for inserting the screw 35 into the screw hole 9 of the support plate 2 for screwing.

A counterbore (a funnel-shaped counterbore) is formed in the through hole 34, and a countersunk head screw (a screw having a conical head) is used as the screw 35. Therefore, the head of the screw 35 does not project to the surface of the outer sandwiching plate 32, and the cover 36 described below can be fitted in close contact with the outer sandwiching plate 32.

The cover 36 is formed with a window 36a through which the front side of the receptacle 6 is exposed, and is further formed so that it can be fitted to the inner peripheral side of the standing edge portion 37 of the mounting flange 33. In the present embodiment, as shown in the drawing, a locking claw 38 is formed on the surface of the cover 36 facing the outer sandwiching plate 32, and a locking hole 39 is formed in the corresponding portion of the outer sandwiching plate 32. With this, cover 3 with one touch
6 can be fitted.

Incidentally, the standing edge portion 37 of the mounting flange 33.
The height of is approximately the sum of the thickness of the cover 36 and the thickness of the outer sandwiching plate 32.

Since the other components are the same as those in FIGS. 1 and 2, the same reference numerals are used.

Next, regarding the procedure for assembling the electrical connection box 31 in FIG. 4, (1) and (2) in the procedure for assembling the electrical connection box 1 in FIGS. 1 and 2 described above are common.
Therefore, the step of attaching the attachment flange 33 (3)
Let's start with.

(3) Then, the mounting flange 33 is fitted into the mounting hole 5, and a hand is inserted through the central hole, and the supporting plate 2 is put into the finger-inserting hole 8 and supported while being supported by the pair of screws 13. 33 is screwed onto the support plate 2, and the support plate 2 and the mounting flange 33 clamp the peripheral edge of the mounting hole 5 to temporarily fix it.

(4) Next, the outer holding plate 32 is fitted so as to come into contact with the pedestal portion 33a of the mounting flange 33, and is firmly connected to the support plate 2 by two pairs of screws 35.
By doing so, the support plate 2 having the receptacle 6
Is fixed to the wall plate W so as to press the peripheral edge of the mounting flange 33 and the mounting hole 5 of the wall plate W with the outer holding plate 32.

(5) Finally, the cover 36 is attached to the outer holding plate 32.
It is fitted to the vertical edge portion 37 of the above, and the attachment is completed.

As described above, the electrical connection box of the present invention can be easily attached from the indoor side.

As a method of fixing the receptacle 6 to the support plate 2 in the above embodiment, a conventionally known method may be used.
For example, in the art, there is a method of attaching a receptacle to a case. As shown in FIG. 5, locking portions 42 and 43 are formed on two opposite sides of the receptacle insertion hole 41 in the support plate 2, and a twelve operation slit 44 is formed near one side. Locking slits 45 and 46 are formed in advance on the receptacle 6. Then, the receptacle 6 is inserted into the one locking slit 45 so as to lock the one locking portion 42 of the support plate 2 (FIG. 5A). Then, by inserting a flat-blade screwdriver or the like into the operation slit 44 and prying, the other locking portion 43 is locked in the other locking slit 46 of the receptacle 6 (FIG. 5B), and the receptacle 6 is fixed to the support plate 2. It will be fixed.

The material for the electrical connection box is not particularly limited as long as it is excellent in workability and has appropriate strength.

For example, the support plate 2 and the outer holding plate 32 that strongly press the wall plate are preferably made of metal such as a stainless steel plate or a plated or anti-corrosion coated iron plate, and the mounting flange 33, the covers 4, 36 and The protective cover 7 is preferably synthetic resin. It should be noted that even with the mounting flange, as shown in FIGS. 1 and 2, a mounting flange 3 that firmly presses the wall plate 3
Is preferably made of metal. Further, since the covers 4 and 36 are exposed to the inside of the room, it is preferable to apply a color or the like.

[0049]

The electric connection box of the present invention does not need to have its supporting plate fixed to the outer wall as in the prior art, but simply connects and hangs the cable wire hanging between the outer wall and the inner wall. Since it only needs to be placed, it can be moved to the position of the appropriately formed mounting hole to some extent. That is, accurate positioning of the mounting hole is not required. Moreover, since the attachment to the wall plate is only required to hold the wall plate with the outer holding plate, it can be easily attached. Further, since the mounting hole is circular, it can be easily formed by anyone with a simple tool. Therefore, there is no risk of damaging the wall plate during installation, and labor costs as equipment costs can be reduced.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view before assembly showing an embodiment of an electrical connection box of the present invention.

FIG. 2 is a partially cutaway perspective view showing a mounted state of the electrical connection box of FIG.

FIG. 3 is a perspective view showing an example of a blade for punching an electric outlet attachment hole.

FIG. 4 is a partially cutaway perspective view before assembly showing an embodiment of an electrical connection box of another aspect of the present invention.

FIG. 5 is an explanatory view showing a method of fixing the receptacle in FIGS. 1 and 4.

FIG. 6 is a perspective view before assembly showing an example of a conventional electric outlet.

[Explanation of symbols]

 1, 31 Electrical connection box 2 Support plate 3, 33 Mounting flange 4 Cover 5 Mounting hole 6 Receptacle 8 Finger insertion hole 10 Small ring part 11, 33a Pedestal part 32 Outer clamping plate W Wall plate

Claims (2)

[Claims] 1. A support plate to which an electric connection member connected to an end of a cable suspended on the back side of a wall plate to be attached is fixed, and (b) formed on the wall plate to be attached. A mounting flange having a small ring portion that can be fitted into the circular mounting hole and a pedestal portion that abuts on the peripheral edge of the mounting hole; and (c) the mounting flange is provided so as to expose the electrical connection member. And a cover for holding the peripheral edge of the mounting hole between the support plate and the mounting flange so that the electrical connection member can be fixed to the mounting target wall plate. Box for electrical connection. 2. A support plate to which an electric connection member connected to an end of a cable suspended on the back side of the wall plate to be attached is fixed, and (b) formed on the wall plate to be attached. A mounting flange having a small ring portion that can fit into the circular mounting hole and a pedestal portion that abuts the peripheral edge of the mounting hole; and (c) an outer holding plate that can engage with the mounting flange, An electrical connection box configured to fix the electrical connection member to the attachment target wall plate by sandwiching the peripheral edge of the attachment hole between the support plate and the outer sandwiching plate.