JPH05153710A - Round fixture frame for wiring accessories - Google Patents

Abstract

PURPOSE:To prevent the terminal part of wiring accessories from contacting with glass wool or the like filled on the inside of a fixing panel. CONSTITUTION:A wiring accessory 2 is fixed to the central part of a plate frame. The plate frame has peripheral part abutting on the surface side of a fixing panel in such a manner that a round fixing hole of the fixing panel is covered. A fixing metal 6 is screwed to the tip of a fixing screw 5 inserted in the thickness direction at the peripheral part of the plate frame thus holding the fixing hole at the peripheral part thereof together with the plate frame. A protective cover 3 engages with the plate frame while covering the terminal part of the wiring accessory 2 fixed to the plate frame. In other words, the protective cover 3 is interposed between the terminal part of the wiring accessory 2 and glass wool filled in the inside of the fixing panel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiring device round mounting frame to which wiring devices are attached and which are mounted in round mounting holes formed in a mounting panel.

[0002]

2. Description of the Related Art Conventionally, a rectangular mounting frame has been widely used as a mounting frame for wiring equipment. This mounting frame can be mounted directly on a wooden wall, mounted on a switch box embedded in a concrete wall, or formed with square mounting holes on a wooden mounting panel such as a veneer board and between the brackets. It is configured to correspond to the mounting method of sandwiching the mounting panel with.

By the way, in recent years, a plate material made of an inorganic material such as a gypsum board has been increasingly used as a mounting panel for the interior of a house. Since the plate material made of such an inorganic material is brittle, it is a very troublesome work to form the square mounting hole, and the conventional square mounting frame has a problem that the mounting work is troublesome. .. On the other hand, even if the plate material is an inorganic material, the round mounting holes can be easily formed by using a hole saw (round hole drilling machine).

In view of the above circumstances, a round mounting frame has been considered which can be fixed to a mounting panel such as a wall panel by partially inserting it into a round mounting hole formed in the mounting panel. There is.

[0005]

Since the round mounting frame as described above is fixed to the mounting panel by partially inserting the mounting frame into the mounting hole formed in the mounting panel, heat insulation is provided inside the mounting panel. Also, there is a problem that the filling material such as glass wool or rock wool, which is filled for the purpose of soundproofing, comes into contact with the terminal portion of the wiring device attached to the mounting frame. That is, if the filling contains moisture, it may come into contact with the terminal portion and cause a risk of electric leakage.

On the other hand, in the conventional rectangular mounting frame, it is possible to prevent the filler in the wall from directly contacting the terminal portion of the wiring device by using a switch box or the like, but the circular mounting frame is used. Since a switch box or the like cannot be used in the frame, there is a demand for a configuration that prevents contact between the terminal portion of the wiring device and the filling material. The present invention is intended to solve the above problems, and can be attached to a round mounting hole formed in a mounting panel, and moreover, a terminal portion of a wiring device can be attached to a filling material filled inside the mounting panel. The present invention aims to provide a round mounting frame for a wiring device, which prevents contact between the two.

[0007]

In order to achieve the above object, according to the invention of claim 1, the peripheral portion abuts on the front surface side of the mounting panel so as to cover the round mounting hole formed in the mounting panel. The round plate frame to which the wiring device is attached in the central part and the peripheral part of the mounting hole between the plate frame and the tip of the fixing screw inserted in the thickness direction at the peripheral part of the plate frame. With a mounting bracket that holds the mounting bracket in place, when a part of the mounting bracket is projected from the peripheral edge of the plate frame and the fixing screw is abutted against one side edge of the mounting bracket, A rotation stop surface capable of attracting the mounting bracket to the plate frame is formed on the back side of the plate frame, and the protective cover engages with the plate frame so as to cover the back side of the wiring device having the terminal portion.

According to the second aspect of the present invention, the electric wire lead-out notch through which the electric wire connected to the terminal portion of the wiring device can pass is formed in the vicinity of the portion of the protective cover facing the back surface of the wiring device. is there. According to the invention of claim 3, in the vicinity of the portion of the protective cover facing the back surface of the wiring device,
A knockout portion is formed that has a smaller thickness than other portions and can be easily cut off, and the wire lead-out notch is a cutout formed by cutting off the knockout portion.

According to a fourth aspect of the present invention, the protective cover is provided between the terminal portion on the rear surface side of the wiring device and the mounting metal fitting in the direction connecting the center of the plate frame and the fixing screw, and the center of the plate frame. An electric wire restricting piece that prohibits passage of an electric wire in a direction along the straight line is provided at a portion opposite to the rotation stop surface with a straight line connecting the fixing screw interposed therebetween.

[0010]

According to the structure of the first aspect, the circular mounting which is perforated in the mounting panel in a state where the mounting bracket is prevented from protruding from the peripheral edge of the plate frame by rotating the mounting bracket around the fixing screw. If you insert the fixing screw and the mounting bracket into the hole and then tighten the fixing screw, the mounting bracket rotates until the side edge contacts the rotation stop surface, and the tip of the mounting bracket projects from the peripheral edge of the plate frame. Then, by further tightening the fixing screw, the mounting bracket approaches the plate frame while the rotation is stopped by the rotation stop surface. In this way, by tightening the fixing screw, the peripheral portion of the mounting hole can be sandwiched between the peripheral portion of the plate frame and the mounting bracket, and the plate frame can be fixed to the mounting panel. That is, the plate frame can be attached to the round mounting hole. Further, since the protective cover engages with the plate frame so as to cover the back surface side provided with the terminal portion of the wiring device attached to the plate frame, the terminal portion of the wiring device is engaged by engaging the protective cover with the plate frame. Therefore, it is possible to prevent the terminals from coming into contact with the filler arranged inside the mounting plate.

According to the second aspect of the invention, since the electric wire lead-out notch through which the electric wire can be passed is formed in the protective cover, a large bending stress does not act on the electric wire by passing the electric wire lead-out notch. It can be installed. According to the structure of claim 3, since the protective cover is provided with the knockout portion, and the notch cut out of the knockout portion is used as the electric wire lead-out notch, whether the knockout portion is cut out according to the number of wires or hardness. Can be selected, and construction conditions can have a wide range.

According to the fourth aspect of the present invention, the center of the plate frame and the fixing screw are between the terminal portion and the mounting metal fitting on the rear surface side of the wiring device in the direction connecting the center of the plate frame and the fixing screw. Since the protective cover is provided with a wire restriction piece that prohibits the wire from passing through on the side opposite to the rotation stop surface across the straight line connecting the The wire withdrawal position can be restricted by the wire restricting piece so that it will not be placed on the wire.When the plate frame is attached to the mounting hole by tightening the fixing screw, the wire does not become the mounting bracket even if the mounting bracket rotates. The contact can be prevented, and the electric wire will not be entangled with the mounting bracket.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a plate frame 1 is made of synthetic resin in a round shape, and a wiring device 2 is attached to the central portion of the plate frame 1. The wiring device 2 is a ready-made wiring device whose external dimensions and mounting dimensions are standardized according to JIS standards and the like, and a holding hole in which a mounting claw (not shown) provided on the side surface is provided in the plate frame 1 (Fig. It is attached to the plate frame 1 by engaging with (not shown).

A pair of fixing screws 5 are provided on the periphery of the plate frame 1.
Is inserted in the thickness direction from the surface side of the plate frame 1. The fixing screws 5 are arranged apart from each other in the diameter direction of the plate frame 1. One end in the longitudinal direction of a mounting bracket 6 formed in a rectangular plate is screwed onto the tip of the fixing screw 5. The peripheral edge of the portion of the mounting bracket 6 where the fixing screw 5 is screwed is formed in an arc shape. A guide rib 7 having a substantially U-shaped cross section along the back surface of the plate frame 1 is provided on the back surface of the plate frame 1 in the vicinity of the fixing screw 5. When the fixing screw 5 is rotated, one end portion of the mounting member 6 with which the fixing screw 5 is screwed is inserted into the guide rib 7 so that the mounting member 6 can be prevented from rotating together with the fixing screw 5. Further, in this state, the tip of the mounting member 6 projects from the peripheral edge of the plate frame 1. Therefore, a round mounting hole having a diameter smaller than that of the plate frame 1 is formed in the mounting panel, the peripheral portion of the plate frame 1 is brought into contact with the surface of the mounting panel so as to cover the mounting hole, and then fixed. If the mounting bracket 6 is brought closer to the plate frame 1 by tightening the screw 5, the mounting panel is sandwiched between the peripheral part of the plate frame 1 and the mounting bracket 6 at the peripheral part of the mounting hole, and the plate frame 1 is It is fixed to the mounting panel.

By the way, when inserting the fixing screw 5 and the mounting bracket 6 into the mounting hole formed in the mounting panel, if the tip of the mounting bracket 6 projects from the peripheral edge of the plate frame 1, it will hit the mounting hole and be difficult to insert. It is a thing. Therefore, one leg piece 7a of the guide rib 7 is set to have a smaller protruding dimension from the plate frame 1 than the other leg piece 7b so that the mounting bracket 6 can be set so as not to project from the plate frame 1. .. With this configuration, the mounting bracket 5 can be positioned inside the peripheral edge of the plate frame 1 as shown in FIG. 1 before mounting on the mounting panel. If the fixing screw 5 is tightened after inserting the fixing screw 5 and the mounting bracket 6 into the mounting hole, the tip of the mounting bracket 6 rotates so as to project from the peripheral edge of the plate frame 1. After that, the side edges of the mounting bracket 6 contact the leg pieces 7b of the guide ribs 7, so that the mounting bracket 6 does not rotate even when the fixing screw 5 is tightened, and the mounting bracket 6 is attached to the plate when the fixing screw 6 is tightened. It will approach frame 1. That is, the guide rib 7
The inner surface of the leg piece 7b functions as a rotation stop surface. vice versa,
When loosening the fixing screw 6, the side edge of the mounting bracket 6 abuts on the leg piece 7a of the guide rib 7 so that the fixing screw 5
When the mounting bracket 6 moves away from the plate frame 1 and reaches the tip of the leg piece 7a while being prevented from rotating together, the mounting bracket 6 can be easily removed by rotating so as to enter the inside of the peripheral edge of the plate frame 1. Like

A decorative plate 4 made of synthetic resin is arranged on the surface of the plate frame 1. An opening window 4a exposing the wiring device 2 is formed in the center of the decorative plate 4. On the back surface of the peripheral portion of the decorative plate 4, a peripheral wall that engages with the step portion 1a of the peripheral portion of the plate frame 1 is projected, and when the front surface of the plate frame 1 is covered with the decorative plate 4, The peripheral surface and the peripheral surface of the decorative plate 4 are flush with each other. Further, a fitting leg (not shown) having a hook at the tip is provided on the back surface of the decorative plate 4, and the fitting leg engages with the fitting hole 1b of the plate frame 1 so that the decorative plate 4 becomes a plate. It is adapted to be connected to the frame 1.

On the other hand, a protective cover 3 made of synthetic resin or the like is attached to the back side of the plate frame 1 so as to cover the back side of the wiring device 2 having the terminal portion. As shown in FIG. 2 to FIG. 5, the protective cover 3 has a pair of center pieces facing the back surface of the wiring device 2 and a pair of engaging claws 3a that engage with the engaging cutouts 1c provided in the plate frame 1. It is formed in a substantially U shape with legs. The protective cover 3 is connected to the plate frame 1 in a manner that both leg pieces are arranged in a direction orthogonal to the direction in which both fixing screws 5 are connected.

A protective cover 3 facing the back surface of the wiring device 2.
In the center piece, a notch 3b for leading out an electric wire is formed, which is open to face each side edge where the leg piece is not provided. The two electric wire lead-out notches 3b are provided near the leg piece 7b having a larger protrusion size from the back surface of the plate frame 1 in the guide rib 7 with respect to the center line passing between the leg pieces in the central piece. Further, with respect to the center line, a knockout portion 3c having a smaller thickness than other portions is formed near the leg piece 7a having a smaller protruding dimension from the back surface of the plate frame 1 in the guide rib 7, and the knockout portion 3c is formed. Correspondingly, an electric wire restriction piece 3d is provided on the central piece of the protective cover 3 in the same direction as the leg piece. In the state where the protective cover 3 is coupled to the plate frame 1, the tip of the wire regulation piece 3d is located near the back surface of the wiring device 2. Further, in the direction in which both fixing screws 5 are connected, a wire restriction piece 3d is formed between the terminal portion of the wiring device 2 and the mounting fitting 6. Therefore, the wire regulation piece 3d does not hinder the rotation of the mounting bracket 6.

When the protective cover 3 having the above structure is joined to the plate frame 1, the protective cover 3 is interposed between the wiring device 2 and the filler such as glass wool or rock wool disposed inside the mounting panel. Therefore, the filler is prevented from coming into contact with the terminal portion of the wiring device 2. Moreover, since the electric wire connected to the terminal portion of the wiring device 2 is passed through the electric wire lead-out notch 3b, the electric wire can be wired without exerting a large bending stress on the electric wire, and the construction is easy. is there. Here, since the protective cover 3 is provided with the electric wire regulation piece 3d, the electric wire connected to the wiring device 2 is limited in the drawing position from the protective cover 3 by the electric wire regulation piece 3d. Further, since the protective cover 3 has the electric wire regulating piece 3d near the leg piece 7a of the guide rib 7 having the smaller protrusion amount with respect to the center line passing between the leg pieces, the protective cover 3 is within the rotation range of the mounting bracket 6. Since the electric wire is not pulled out, it is possible to prevent the electric wire from being entangled with the mounting bracket 6 when the mounting bracket 6 rotates. By the way, when the number of electric wires is too large to pass through the electric wire lead-out notch 3b, the knocked-out portion 3c can be cut off to use the cut-out part 3c as the electric wire lead-out notch. Therefore, by providing two electric wire lead-out notches, it is possible to cope with the case where the number of electric wires is large. Further, if the electric wire lead-out notch formed by cutting off the knockout portion 3c is set to have an opening area larger than that of the electric wire lead-out notch 3b formed from the beginning, it corresponds to a thick electric wire. It is also possible.

[0020]

According to the first aspect of the present invention, since the protective cover is engaged with the plate frame so as to cover the rear surface side of the wiring device attached to the plate frame, the rear surface side being provided with the terminal portion, the protective cover is attached to the plate frame. There is an advantage that the terminal portion of the wiring device can be covered by the engagement, and the terminal portion can be prevented from coming into contact with a filler such as glass wool or rock wool disposed inside the mounting plate.

According to the second aspect of the present invention, since the electric wire lead-out notch through which the electric wire can be passed is formed in the protective cover, the electric wire is constructed by passing the electric wire lead-out notch without exerting a large bending stress on the electric wire. This has the effect of facilitating construction and facilitating construction. According to the third aspect of the present invention, since the protective cover is provided with the knockout portion and the notch cut out of the knockout portion is used as the notch for leading out the electric wire, it is possible to select whether or not to cut out the knockout portion according to the number of wires or hardness. This has the advantage that the construction conditions can be varied.

According to a fourth aspect of the present invention, the center of the plate frame and the fixing screw are connected between the terminal portion on the rear surface side of the wiring device and the mounting metal fitting in the direction of connecting the center of the plate frame and the fixing screw. Since the protective cover is provided with an electric wire restriction piece that prohibits the electric wire from passing through on the side opposite to the guide rib across the straight line, the electric wire connected to the terminal part of the wiring device is not placed near the mounting bracket. The wire restricting piece can be used to control the position where the wire is pulled out, so that when the plate frame is attached to the mounting hole by tightening the fixing screw, the wire does not come into contact with the mounting bracket even if the mounting bracket rotates. Therefore, it is possible to prevent the electric wire from being entangled with the mounting bracket.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment.

FIG. 2 is a front view showing a protective cover used in the embodiment.

FIG. 3 is a sectional view taken along the line XX in FIG.

FIG. 4 is a rear view showing a protective cover used in the embodiment.

5 is a sectional view taken along line YY in FIG.

[Explanation of reference numerals] 1 plate frame 1c engaging notch 2 wiring device 3 protective cover 3a engaging claw 3b electric wire leading notch 3c knockout part 3d electric wire regulating piece 4 decorative plate 5 fixing screw 6 mounting bracket 7 guide rib

Claims (4)

[Claims] 1. A round plate frame in which a peripheral portion abuts on a front surface side of the mounting panel and a wiring device is attached to a central portion so as to cover a round mounting hole formed in the mounting panel, and a plate frame. And a mounting bracket that clamps the peripheral portion of the mounting hole with the plate frame by screwing with the tip of a fixing screw that is inserted in the thickness direction at the peripheral part of the mounting frame from the peripheral edge of the plate frame. When the mounting bracket is pulled out and abuts against one side edge of the mounting bracket when tightening the fixing screw, the mounting bracket can be attracted to the plate frame with the mounting bracket rotating. A circular mounting frame for wiring equipment, wherein a protective cover is formed on the wiring frame, and the protective cover engages with the plate frame so as to cover the back side having the terminal portion of the wiring equipment. 2. An electric wire lead-out notch through which an electric wire connected to a terminal portion of the wiring device can pass is formed in the vicinity of a portion of the protective cover facing the back surface of the wiring device. Round mounting frame for wiring equipment according to 1. 3. A knockout portion is formed in the vicinity of a portion of the protective cover facing the back surface of the wiring device, the knockout portion having a smaller thickness than other portions and can be easily cut off, and the knockout portion for cutting out the wire is cut out. The circular mounting frame for wiring equipment according to claim 2, wherein the circular mounting frame is a notch formed by 4. The protective cover is connected between the terminal portion on the rear surface side of the wiring device and the fitting in the direction connecting the center of the plate frame and the fixing screw, and connects the center of the plate frame and the fixing screw. On the opposite side of the rotation stop surface across the straight line,
A round mounting frame for a wiring device, which is provided with an electric wire restricting piece for prohibiting passage of an electric wire in a direction along the straight line.