JPH03245711A - Plate frame for wiring hardware - Google Patents

Abstract

PURPOSE:To prevent the main body of a plate frame from being broken down by a load, by a construction wherein a peripheral wall is provided in projection backward from the peripheral edge of the main body of the plate frame so that it is inclined obliquely outside, and a stepped part supporting the peripheral part of an ornamental plate corresponding to the part of contact of the rear end face with a fitting face is formed on the front surface side of the peripheral wall. CONSTITUTION:A peripheral wall 12 projecting backward is formed in the whole circumference of the outer peripheral edge of the main body 1 of a plate frame. Besides, a stepped part 13 is formed in the whole circumference of the front surface of the peripheral wall 12, and the peripheral part of an ornamental plate 2 engages with this stepped part 13. The peripheral wall 12 projects backward from the outer peripheral edge of the main body 1 of the plate frame so that it is directed outward obliquely, while the stepped part 13 is formed in an area in the peripheral wall 12 corresponds to the rear end face coming into contact with a fitting face. In other words, a load not act on a part not being fitted on and separated from the fitting face, when it acts on the stepped part 13 from the front.

Description

[Detailed description of the invention] [Industrial application field]

The present invention provides a plate frame for a wiring device that is arranged to cover an embedded hole formed on a mounting surface, has an opening window in the center that exposes the wiring device, and has a decorative plate attached to the front surface. It is related to.

[Conventional technology]

Conventionally, as shown in FIG. 1, this type of plate frame for wiring devices has an opening window 11 in which the wiring devices are exposed in the center.
There is provided a plate frame main body 1 having a shape in which a decorative plate 2 is attached to the front surface. The plate frame main body 1 is fixed to the mounting surface so as to cover an embedded hole formed in the mounting surface. Further, a first holding piece 21 and a second holding piece 22 are provided on the left and right sides of the opening window 11, respectively.
are formed (see FIG. 5), and the inner circumferential surfaces of the locking recesses 23° 24 formed in the first holding piece 21 and the second holding piece 22 are connected to the back surfaces of both sides of the opening window 11. Wiring equipment between 3
The locking protrusions 4 protruding from each side surface are held in place. The first holding piece 22 is attached to the plate frame main body 1 so as to be flexible from side to side, and in order to remove the wiring fixture 3 held on the plate frame main body 1, the first holding piece 22 is pried with a screwdriver or the like. All you have to do is bend it.

[Problem to be solved by the invention]

By the way, the decorative plate 2 is attached to the front of this type of plate frame body 1, and it is necessary to accurately align the plate frame body 1 and the decorative plate 2 so that the appearance at the time of installation is beautiful. is desired. In addition, the wiring device 3 is prevented from falling off even if the plate frame body 1 is bent due to the force applied when the plate frame body 1 is brought into close contact with the mounting surface, and the plate frame 3 is prevented from falling off when a load is applied to the decorative plate 2. It is required to prevent the main body 1 from being damaged. The present invention is aimed at satisfying the above requirements, and is capable of accurately aligning a decorative plate with respect to a plate frame body, and by applying a load that acts to bring the plate frame body into close contact with the mounting surface. To provide a plate frame for a wiring device which prevents the wiring device from falling off and further prevents the plate frame main body from being damaged by the load acting on the decorative plate.

[Means to solve the problem]

In the configuration of claim 1, in order to achieve the above object, the wiring device is disposed to cover the inside of the embedded hole formed in the mounting surface, a decorative plate is attached to the front side, and the front side of the wiring device is mounted in the center. It has a plate frame body with an exposed opening window,
In a plate frame for a wiring device, in which circumferential walls, the rear end surfaces of which are in contact with the mounting surface, are mutually formed on the circumferential edge of the plate frame body, the circumferential walls are inclined diagonally outward from the circumferential edge of the plate frame body. A stepped portion is formed on the front side of the circumferential wall to receive the circumferential portion of the decorative plate in correspondence with the portion where the rear end surface contacts the mounting surface. In the structure of claim 2, the first holding piece and the second holding piece are provided on both left and right sides surrounding the opening window in the plate frame main body,
A locking recess is formed in the first holding piece and the second holding piece for holding the locking protrusions protruding from each side of the standardized wiring device between the back surface of the plate frame main body, 1st
The holding piece is connected to the plate frame main body so as to be visible in the protrusion direction of the locking protrusion, the second holding piece is provided protruding from the back surface of the plate frame main body, and the plate frame main body is attached to both the upper and lower pieces surrounding the opening window. Attachment portions for attaching fixtures that are brought into close contact with the attachment surface are formed, respectively, and a first holding piece and a second holding piece are formed between the two attachment portions.

[Effect]

According to the configuration of claim 1, when the decorative plate is attached to the front surface of the plate frame main body, it is guided by the outer surface of the peripheral wall and driven into the stepped portion, so that the decorative plate is not accurately attached to the plate frame main body. This allows for positioning. As a result, a beautiful appearance can be achieved in the installed state. Since a stepped portion is formed on the front side to receive the peripheral part of the decorative plate within the area of the peripheral wall that contacts the mounting surface, the peripheral wall does not bend due to the load acting on the decorative plate. This prevents damage to the plate frame body due to the load from the decorative plate. According to the structure of claim 2, the wiring device is held between the first holding piece and the second holding piece, and the first holding piece and the second holding piece are arranged along the side pieces of the opening window. By forming this, the plate frame main body is reinforced. In addition, mounting portions are formed on both the upper and lower pieces surrounding the opening window to which fixtures are attached to tightly attach the plate frame main body to the mounting surface, and a first holding piece and a second holding piece are formed between the two mounting portions. Therefore, even if a load is applied to the plate frame body by the fixture attached to the mounting part, deformation such as increasing the distance between the first holding piece and the second holding piece does not occur. This prevents the wiring device held between the first holding piece and the second holding piece from falling off.

【Example】

As shown in FIGS. 1 to 5, the plate frame main body 1 is a rectangular frame body with a rectangular opening window 11 formed in the center thereof, and is made of synthetic resin. Peripheral walls 12 are formed on the outer peripheral edge of the plate frame main body l so as to protrude rearward from each other along the entire circumference. Furthermore, stepped portions 13 are formed on the front side of the peripheral wall 12 so as to extend along the entire circumference, and the peripheral portion of the decorative plate 2 engages with the stepped portions 13. That is, when the decorative plate 2 is overlapped with the plate frame main body 1, the outer peripheral surfaces of the side walls of the plate frame main body 1 and the decorative plate 2 are flush with each other. As shown in FIGS. 4 and 5, the peripheral wall 12 projects diagonally outward and rearward from the outer peripheral edge of the plate frame main body 1, and the step portion 13 is formed on the rear end surface of the peripheral wall 12 that contacts the mounting surface. It is formed within the corresponding range. In other words, when a load is applied to the stepped portion 13 from the front, the load is not applied to the portion that is floating from the mounting surface. Engagement claws (not shown) that engage with engagement holes 17 drilled in the four corners of the plate frame body 1 are protrudingly provided on the back surface of the decorative plate 2. By engaging, the decorative plate 2 is coupled to the plate frame body 1. A wiring device 3 such as an outlet or a switch is attached to the plate frame body 1 so that its front end is exposed through the opening window 11. The wiring device 3 is formed with unit dimensions set so that it can be attached to a mounting frame for three large rectangular pieces standardized by the JIS standard and the Japan Wiring Appliance Industry Association standard, with a maximum of three sides removed. It has a shape with locking protrusions 4 protruding from both sides for removably attaching it to the mounting frame. The opening window 11 of the plate frame body 1 is formed so that up to three wiring devices 3 of unit size can be attached thereto. The plate frame main body 1 is fixed to a mounting surface by being attached to an embedded box embedded in a mounting surface such as a wall surface, such as a switch box, or by being fixed directly to a wall panel. That is, on both the upper and lower pieces of the plate frame main body 1,
Each of them has an elongated screw insertion hole 14, and by screwing the box screw into the embedded box through the screw insertion hole 14, the plate frame main body 1 can be fixed to the embedded box. In addition, a pair of mounting holes 15 are drilled in each of the upper and lower pieces, and a wood screw can be screwed into the mounting surface through the mounting hole 15, or a screw can be screwed into a mounting tool called a clip through the mounting hole 15. The plate frame body 1 can also be fixed to the mounting surface by sandwiching a wall panel or the like between the clamping fittings and the plate frame body 1. When using the clip, a hook piece provided on a part of the clip is locked into a pair of hook holes 16 formed on both the upper and lower sides of the plate frame body 1 to prevent the clip from falling off. The screw insertion holes 14, the mounting holes 15, the hook holes 16, etc. are located in both the upper and lower parts of the plate frame body 1.
The mounting portion 20 is formed so that its rear surface is located on the same plane as the rear surface of the peripheral wall 12 of the plate frame main body 1. These mounting structures are well-known structures for mounting frames for wiring devices. A first holding piece 21 and a second holding piece 22 are formed on the left and right sides of the plate frame body 1, respectively, so as to extend along the periphery of the opening window 11. Here, the range in which the first holding piece 21 and the second holding piece 22 are formed is set to the range between the mounting portions 20 on both the upper and lower pieces. Three first holding pieces 21 are arranged in parallel in the vertical direction. Each of the first holding pieces 21 is disposed in each through-hole 27 formed at three locations above and below the left piece in FIG. Continuing integrally with both the upper and lower peripheries. Further, both the left and right sides of the first holding piece 21 are arranged so as to be separated from the left and right edges of the through hole 27. That is, since the plate frame main body 1 is made of synthetic resin, the first holding pieces 21 are visible from side to side within the range of the through hole 27. In each first holding piece 21,
A pair of locking recesses 23 are formed on one side of the opening window 11 (the fabric surface in FIG. 2), and the rear surface of the peripheral edge of the opening window 11 and the inner circumferential surface of the locking recess 23 are connected to each other. A space is formed in between, which is large enough to allow the locking protrusion 4 of the wiring device 3 to be inserted. Here, the relationship between the first holding piece 21 and the peripheral wall 12 is set so that the first holding piece 21 does not protrude rearward beyond the rear end of the peripheral wall 12. On the other hand, the second holding piece 22 is provided in a protruding manner on the back surface of the plate frame main body 1, and the second holding piece 22 is provided in a locking recess 2 of the first holding piece 21.
A locking recess 24 is formed in each portion facing the portion 3. Here too, the back surface of the peripheral edge of the opening window 11 and the locking recess 2
A space large enough to allow the locking projection 4 of the wiring device 3 to be inserted is formed between the wiring device 4 and the inner circumferential surface of the wiring device 3 . As shown in FIG. 6, the second holding piece 22 has a base located forward of the rear end surface of the peripheral wall 12, and a surface opposite to the surface on which the locking recess 24 is formed is an inclined surface 22a. The wall thickness is increased on the base side. Further, a part of the second holding piece 22 protrudes rearward from the rear end surface of the peripheral wall 12, and at this protruding portion, the front surface of the plate frame main body 1 is Plane 2 approximately perpendicular to
2b is formed. Further, on one surface of the second holding piece 22 on the side of the opening window 11, a guide surface 22 is formed which slopes so as to increase in thickness from the tip end toward the base end, all the way to the locking recess 23. A removal hole 25 is bored in the plate frame body 1 at a portion between a pair of locking recesses 23 corresponding to one wiring device 3.Furthermore, as shown in FIG. Reinforcing ribs 26 formed in a substantially U-shape are provided protruding from the back surface between the first holding piece 21 and the peripheral wall 12 and between the second holding piece 22 and the peripheral wall 12.The first holding piece Since the piece 21 and the second holding piece 22 are formed along the side edge of the opening window 11, they have the function of reinforcing the plate frame main body 1, and in addition, by forming the reinforcing rib 26, , it is possible to prevent the plate frame body 1 from warping due to an external force that is applied when attaching the plate frame body 1 to an embedded box, etc. In addition, the first holding piece 21
and the second holding piece 22 are formed in the dark range of the upper and lower mounting parts 20, so that when the plate frame main body 1 is mounted on the mounting surface, the rear surface of the mounting part 20 is located behind the mounting surface. Even if a load is applied to the plate frame body 1, this deflection can be absorbed by the side portions of the mounting portion 20 of the plate frame main body 1, thereby preventing the first holding piece 21 and the second holding piece 22 from deforming. It can be prevented. That is, it is possible to prevent the horizontal width of the opening window 11 from changing, and to prevent the wiring device 3 from falling off. According to the above configuration, when the wiring device 3 is attached to the plate frame main body 1, the locking protrusion 4 protruding from one side of the wiring device 3 is engaged in the locking recess 23 of the first holding piece 21. In the fitted state, the second holding piece 22 is brought into contact with the locking protrusion 4 protruding from the other side of the wiring device 3 against the guide surface 22C.
What is necessary is just to make it introduce into the locking recess 24 formed in . At this time, the wiring device 3 is pressed by the guide surface 22c to bend the first holding piece 21, and is finally introduced into the locking recess 24. On the other hand, in order to remove the wiring device 3 from the plate frame main body 1, insert a jig such as a screwdriver into the removal hole 25 and apply force to press the wiring device 3 toward the first holding piece 21. By bending the first holding piece 21, the stationary state between the second holding side 22 and the wiring device 3 is released, and the wiring device 3 can be removed from the plate frame main body 1. As mentioned above, since only the tip of the second holding piece 22 is shaped to protrude rearward with respect to the rear end surface of the peripheral wall 2 of the plate frame body 1, the first holding piece 21 and the second holding piece 2
Compared to the case where both 2 and 2 protrude, the horizontal width of the embedding hole can be made smaller, making construction easier. In addition, by increasing the thickness of the base of the second holding piece 22, while preventing the second holding piece 22 from breaking, the second holding piece 22 may protrude rearward from the rear end surface of the peripheral wall 12. By making one surface of the holding portion a flat surface 22b, the horizontal width required for the embedding hole can be reduced compared to the case where the second holding piece 22 protrudes with the same thickness as the base. Note that the second holding piece 22
It is also possible to increase the amount of protrusion of the peripheral wall 12 to the extent that it does not protrude from the rear end surface of the peripheral wall 12, but in that case,
The amount of protrusion from the mounting surface becomes large, which impairs the aesthetic appearance. It is also conceivable to reduce the amount of protrusion of the second holding piece 22 from the back surface of the plate frame main body 1, but the locking protrusion 4 on one side of the wiring device 3 can be inserted into the locking recess of the first holding piece 21. 23, the guide surface 2 of the second holding piece 22
Since the minimum dimension is necessary for the locking protrusion 4 on the other side of the wiring device 3 to come into contact with the second
The amount of protrusion of the holding piece 22 cannot be made small. In the configuration of this embodiment, all of these problems are solved.
This makes it possible to reduce the opening width of the embedding hole while ensuring the minimum necessary amount of protrusion of the second holding piece 22, thereby facilitating construction.

【Effect of the invention】

As described above, in the structure of claim 1, when the decorative plate is attached to the front surface of the plate frame main body, it is guided by the outer surface of the peripheral wall and driven into the stepped part, so that the decorative plate is not attached to the plate frame main body. This allows for accurate positioning. As a result, there is an advantage that a beautiful appearance can be exhibited in the attached state. In addition, since a step part is formed on the front side to receive the peripheral part of the decorative plate within the area of the peripheral wall that contacts the mounting surface, the peripheral wall does not bend due to the load acting on the decorative plate, and the decorative plate This prevents damage to the plate frame body due to the load from the outside. According to the structure of claim 2, the wiring device is held between the first holding piece and the second holding piece, and the first holding piece and the second holding piece are arranged along the side pieces of the opening window. This structure has the effect of reinforcing the plate frame body. In addition, mounting portions are formed on both the upper and lower pieces surrounding the opening window to which fixtures are attached to tightly attach the plate frame main body to the mounting surface, and the first holding piece and the second holding piece are placed between the two numbered parts. Therefore, even if a load is applied to the plate frame body by a fixture attached to the mounting part, deformation such as increasing the distance between the first holding piece and the second holding piece does not occur. There is an advantage that the wiring device held between the first holding piece and the second holding piece is prevented from falling off.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing Embodiment 1 of the present invention, FIG. 2 is a front view of the same, FIG. 3 is a rear view of the same, and FIG. 4 is an X in FIG.
-X-ray stair sectional view, Figure 5 is taken along the line X-X in Figure 2! The stair sectional view and FIG. 6 are enlarged sectional views of essential parts of the same. 1... Plate frame body, 2... Decorative plate, 3...
・Wiring device, 4... Locking protrusion, 11... Opening window, 1
2... Peripheral wall, 13... Step part, 20... Mounting part, 21
...First holding piece, 22...Second holding piece, 23.24
...Latching recess.

Claims (2)

[Claims] (1) It has a plate frame body that is arranged to cover the inside of the embedded hole formed on the mounting surface, has a decorative plate attached to the front side, and has an opening window in the center that exposes the front side of the wiring device. However, in a plate frame for a wiring device in which a peripheral wall whose rear end surface is in contact with the mounting surface is formed around the entire circumference of the plate frame main body, the above-mentioned wall is inclined diagonally outward from the peripheral edge of the plate frame main body. A wiring device characterized in that a peripheral wall protrudes rearward, and the peripheral wall has a stepped portion formed on the front side to receive the peripheral portion of the decorative plate corresponding to the portion where the rear end surface contacts the mounting surface. plate frame. (2) The plate frame body is provided with a first holding piece and a second holding piece on both left and right sides surrounding the opening window, and the first holding piece and the second holding piece are attached to each side of the standardized wiring device. A locking recess is formed to hold the respective protruding locking protrusions between the back surface of the plate frame main body, and the first holding piece is attached to the plate frame main body so as to be flexible in the direction in which the locking protrusions protrude. The second holding piece projects from the back surface of the plate frame main body, and the upper and lower pieces surrounding the opening window each have a mounting portion for mounting a fixture that brings the plate frame main body into close contact with the mounting surface. 2. The plate frame for a wiring device according to claim 1, wherein the first holding piece and the second holding piece are formed at a portion between both the mounting parts.