JPH049003B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a packing that houses an embedded wiring device and is used by being embedded in indoor building materials to prevent air leakage.

[Background technology]

The current method of installing embedded wiring devices is to attach the embedded wiring device to a hole made in construction material, and then attach a plate to the front of the embedded wiring device to hide the hole. Therefore, when there is a difference between the indoor and outdoor temperatures due to seasonal changes, air moves through the holes provided in the building materials, allowing condensation to occur and dust to enter.

In order to prevent this, for example, a gasket (air-proof cover) for an embedded wiring device as shown in FIGS. 4a and 4b has been devised.

As shown in FIGS. 4a and 4b, the embedded wiring device packing 1 includes a box body 2, a collar body 3, and a cylinder body 4, respectively. The box body 2 is designed to house embedded wiring devices such as an outlet and a switch inside. The collar body 3 is formed integrally with the box body 2. The cylinder body 4 is the box body 2
A thin-walled part 7 provided at the bottom of the box and protruding inward from the back surface of the box to block communication between the inside and outside of the box body.
is formed. This packing 1 for an embedded wiring device is installed so that the collar body 3 is in contact with the construction material, and a thin wall portion 7 is provided on the cylindrical body 4 for inserting electric wires, so that gas leakage is prevented. .

By the way, in the construction method of attaching the embedded wiring device to the construction material without using the packing for the embedded wiring device, it is possible to do without an embedded box such as a switch box. Figures 5a and 5b show an example of the construction method without an embedded box. As shown in FIGS. 5a and 5b, a wiring device 5 to which electric wires 8 such as VUF cables and VVF cables are connected is attached to a mounting frame 15, and a construction material 16 is sandwiched between this mounting frame 15 and scissors 18. , and is attached by tightening with the mounting screws 13. The plate 9 is attached to the mounting frame 15.
can be installed. 19 is a gap between the wiring device 5 and the plate 9.

However, the packing 1 for an embedded wiring device as shown in FIGS. 4a and 4b does not have any consideration for locking the scissors, so it cannot be installed without an embedded box.

[Purpose of the invention]

In view of the above, an object of the present invention is to provide a packing for an embedded wiring device that can be installed without an embedded box.

[Disclosure of the invention]

In order to achieve the above object, the present invention provides a box body configured to house an embedded wiring device therein, a flange body formed integrally with the box body, and a bottom portion of the box body. Each box is provided with a cylindrical body that is provided so as to protrude inward from the back surface and has a thin-walled part formed on the inside that blocks communication between the inside and outside of the box body, and the flange body is located between the plate and the construction material. A pair of scissors for an embedded wiring device is embedded in a hole provided in the construction material to prevent gas from leaking from the hole, and the scissors are adapted to sandwich the construction material with the collar body. The gist is a packing for an embedded wiring device, which has a hole for inserting and locking a metal fitting, and the hole is covered with a thin part.

Hereinafter, the present invention will be explained in detail with reference to the drawings showing embodiments thereof.

FIGS. 1a to 1c show one embodiment of a packing (air-proof cover) for an embedded wiring device according to the present invention. FIG. 2 shows an example of the mounting state. FIG. 3 shows a part of the installed state.

As shown in FIGS. 1a-c, 2 and 3, this embedded wiring device packing 1 includes a box 2,
A collar body 3 and a cylinder body 4 are each provided.
The box body 2 is adapted to house an embedded wiring device 5 such as an outlet or a switch inside.

The collar body 3 includes a reinforcing plate 6. Reinforcement plate 6
It also functions to maintain adhesion to the surface of the construction material 16. For the reinforcing plate 6, a metal body such as an iron plate is used. The box body 2 and the flange body 3 are integrally formed, for example, by molding thermoplastic resin, rubber, or the like. Note that the box body 2 and the collar body 3 may be molded separately and then integrally formed using an adhesive or the like. The box body 2 is provided with a cylindrical body 4 that protrudes and communicates with its back surface 2a and interior 2b. The inside of the cylindrical body 4 serves as a hole for inserting the electric wire, and there is a thin walled part 7 on the inside that blocks communication between the inside and outside.
is formed. The cylindrical body 4 is placed opposite the position of a terminal hole (not shown) of the wiring device 5 to be housed, and can prevent external force from being applied to the packing 1 by the electric wire 8. Furthermore, the dimensions of the box body 4 cannot be made too short as this will affect the sealing properties, but by shortening the dimension that protrudes from the back surface 2a of the box body 2, the electric wire 8 can be inserted, and the thin part 7 This makes it easier to break through and prevents the cylindrical body 4 from falling over when breaking through. The longer the length of the cylinder 4 protruding into the interior 2b of the box 2, the better the airtightness will be. Tsuba body 3
A reinforcing plate 6 is insert-molded inside to prevent deformation, and is formed to a size that matches the back surface 9a of the plate 9. If the end surface 10 of the collar body 3 is an inclined surface as shown in the figure, it is possible to prevent dust from accumulating on this surface. 11 is wiring equipment 5
This is an insertion hole for a screw 13 for attaching a mounting frame 15 to which a mounting frame 15 is attached. If this screw insertion hole 11 is also formed with a thin wall portion 14 that closes the hole, gas leakage can be further reduced.

On both sides of this screw insertion hole 11, there are scissor metal fittings 1.
A hole 20 for inserting and locking the scissors 8 (a hole for fixing scissors) is provided. The hole 20 for fixing the scissor fittings has a wide part 20a and a narrow part 20b.
It has When installing the wiring device 5 without using the scissors 18, such as by attaching it to an embedded box (not shown) and embedding it in construction materials, if the hole 20 for fixing the scissors is provided, air will move through this hole. Therefore, hole 2 for fixing the scissor metal fittings
0 is preferably provided with a thin wall portion 21 to close it. If the thin wall part 21 has a thickness of, for example, about 1 mm, and can be easily pierced, air will not leak when it is attached without using the scissors 18, and it will be thin when it is attached using the scissors 18. Break through part 21 and insert scissors 1
8 can be inserted.

The scissor fitting 18 includes a pressing part 18a corresponding to the construction material 16, an insertion hole 18b into which the screw 13 is screwed, and a hook part 1 which is inserted into and locked into a hole 20 for fixing the scissor fitting.
8c each. The tip of the hook portion 18c is bent into an L-shape, and the hook portion 18c is locked when the bent portion is caught.

Next, the procedure for construction will be explained. First, an electric wire 8 such as a VUF cable or VVF cable is inserted into the cylindrical body 4, penetrates through the thin wall portion 7, and is connected to the wiring device 5. Hook portion 18 of scissor fitting 18
c is the wide part 20a of the hole 20 for fixing the scissor fittings.
pierce through the thin wall portion 21 and insert the hook portion 18c.
Place the bent part over the hole 20. Then, when the hook portion 18c is moved to the narrow portion 20b of the hole 20, the bent portion of the hook portion 18c catches on the edge of the narrow portion 20b, and the scissors 18 is locked. At this time, it is preferable that the screw insertion hole 11 and the screw insertion hole 18b face each other. The edge of the hole 17 in the construction material 16 such as a wall is interposed between the collar body 3 and the pressing part 18a of the scissors 18, and the screw 1
3, the screw insertion hole (not shown) of the mounting frame 15 on which the wiring device 5 is attached, the screw insertion hole 11 of the packing 1,
The screws are inserted in the order of the screw insertion holes 18b of the scissors 18, and the construction material 16 is sandwiched between the hook portion 3 and the scissors 18. A plate 9 is attached to the mounting frame 15.
In this way, the mounting frame 15 with the wiring device 5 mounted thereon is embedded in the hole 17 provided in the building material 16 via the embedded wiring device packing 1 and attached to the building material 16. When the embedded wiring device 5 is embedded in the hole 17 provided in the construction material 16 and attached to the construction material in this way, the flange body 3 that is in contact with the construction material 16,
A thin wall portion 7 that closes the cylinder 4, a thin wall portion 14 that closes the screw insertion hole 11, and a hole 2 for fixing scissor fittings.
The thin wall portion 21 that closes the hole prevents gas such as air from moving through the hole 17 provided in the construction material 16. Further, the thin wall portion 7 penetrated by the electric wire 8 wraps around the electric wire 8 and fills the gap, thereby preventing the movement of gas. The thin wall portion 14 penetrated by the screw 13 wraps around the screw 13 and fills the gap, thereby preventing the movement of gas. The thin wall portion 21 penetrated by the scissors 18 wraps around the scissors 18 and fills the gap, thereby preventing the movement of gas.

In addition, the mounting frame 15 is a packing 1 for an embedded wiring device.
It may be screwed directly to the construction material 16 via
As shown in FIG. 8, it may be attached to an embedding box 12 via the packing 1. Furthermore, in order to further improve airtightness, an adhesive can be used for the flange body 3, thin wall portion 7, thin wall portion 14, and thin wall portion 21.

Note that this invention is not limited to the above embodiments.

Conventionally, embedded wiring devices have been attached to construction materials as shown in FIGS. 10a and 10b, for example. That is, as shown in Figure 10a and b,
Connect the electric wire 8 such as a VUF cable or VVF cable to the embedded wiring device 5, and attach the mounting frame 15 with the wiring device 5 attached to the embedded box 12 such as a switch box with the screw 13. A plate 9 is attached to a mounting frame 15. If this is done, air will move through the holes 17, causing dew condensation and entry of dust, which is inconvenient for clean rooms, depressurized rooms, and the like.

Therefore, it has been considered to embed the wiring device into the hole in the construction material via a packing for the embedded wiring device.
Figures 4a and 4b show an example of such a packing for an embedded wiring device. As shown in FIGS. 4a and 4b, in this packing 1 for an embedded wiring device, the end surface (portion A) of the collar body 3 was configured with an edge (corner).
For this reason, as shown in FIG. 9, when the plate 9 was attached, there was a drawback that the appearance was poor.
Furthermore, when used in a clean room, part B had the disadvantage that dirt and dust tended to accumulate, impairing the cleanliness.

Therefore, we devised a gasket for embedded wiring devices that looks good when the plate is attached and has a shape that prevents dust from accumulating.

That is, it is a packing for an embedded wiring device as shown in FIG. 6, FIGS. 7a and 7b, and FIG. 8. As shown in FIGS. 6 to 8, this embedded wiring device packing 1 includes a box body 2 that accommodates an embedded wiring device 5 inside, and is formed integrally with this box body 2. and a thin wall portion 7 provided at the bottom of the box body 2 so as to protrude from the back surface 2a to the inside 2b, and blocking communication between the inside and outside of the box body 2.
are each provided with a cylindrical body 4 formed with a
A hole 1 provided in the construction material 16 such that the collar body 3 is located between the plate 9 and the construction material 16.
7 to prevent gas from leaking from the hole 17, and is embedded in the end surface 10 of the flange body 3.
has a tapered shape that becomes larger from the front surface 3a to the back surface 3b over the entire circumference. Therefore, it is possible to prevent dust from accumulating on the end surface 10 of the collar body 3, and when used in a clean room etc.
It saves you the trouble of cleaning such as removing dust. Further, a rib 23 for positioning the plate 9 is provided on the surface 3a. Therefore, the plate 9 can be easily positioned, and the appearance becomes better. The ribs 23 are not limited to four locations as shown in the figure, but may be provided at one or more locations.

The packing 1 for an embedded wiring device shown in FIGS. 6 to 8 is different from that shown in FIGS. 1, except that the ribs 23 are provided, and the holes 20 for fixing the scissor fittings are not necessarily provided.
Since it is the same as that shown in Figures a to c, and the mounting condition is also the same, the same numbers and symbols are given to the same parts, and the explanation will be omitted. If there is no hole 20 for fixing the scissors, they may be attached to an embedded box 12, as shown in FIG.
First, the electric wire 8 is inserted into the cylindrical body 4, penetrates the thin wall portion 7, and is connected to the wiring device 5. Then, the mounting frame 15 on which the wiring device 5 is mounted is attached to an embedded box 12 such as a switch box by screws 13 through the screw insertion holes 11 of the packing 1, and the plate 9 is attached to this mounting frame 15. At this time, the flange body 3 is interposed between the mounting frame 15 and the plate 9, and the construction material 16. In this way, construction material 16
The flange body 3 that is in contact with the cylindrical body 4, the thin wall portion 7 that closes the cylindrical body 4, and the thin wall portion 14 that closes the screw insertion hole 11.
This prevents gas such as air from moving through the holes 17 provided in the construction material 16. In addition, the thin wall portion 7 pierced by the electric wire 8 is
Because it clings to the body and fills the gap,
Prevent gas migration.

Furthermore, the mounting frame 15 may be screwed directly to the construction material 16, and as shown in FIG.
8 may be attached to the construction material 16 so that the construction material 16 is sandwiched therebetween. Further, in order to further improve airtightness, an adhesive can be used for the collar body 3, the thin wall portion 7, the thin wall portion 14, and the like.

24 is a conduit tube through which cables such as VUF cables and VVF cables, power lines, etc. are passed.

〔Effect of the invention〕

The packing for embedded wiring devices according to this invention includes:
As seen above, scissors are inserted into holes provided in construction materials to prevent gas from leaking from these holes, and are designed to sandwich the construction materials with the flange body. It has a hole for locking, and this hole is covered by a thin wall, which prevents gas from moving through the hole in the construction material, preventing dew condensation and dust from entering. Since it can be fixed to construction materials with scissors, it can be installed without an embedded box.

[Brief explanation of drawings]

1a to 1c show one embodiment of the packing for an embedded wiring device according to the present invention, FIG. 1a is a plan view, FIG. 1b is a partially sectional side view, and FIG. 2 is a partially sectional side view showing an example of how the packing for an embedded wiring device is installed; FIG. 3 is an exploded perspective view showing a part of the installation state; FIG. 4a , b shows an example of a conventional packing for an embedded wiring device, FIG. 4 a is a plan view, FIG. 4 b is a side view, and FIGS. 5 a and b show a wiring device installed without an embedded box. Fig. 5a is a partial plan view, Fig. 5b is a partial sectional side view, Fig. 6 is a plan view of the packing for the embedded wiring device, and Figs. 7a and b are partial sectional side views thereof. Figure, 8th
The figure is a partial cross-sectional side view showing an example of the installed state, Figure 9 is a partial cross-sectional side view showing the end shape of the flange, and Figures 10 a and b are the state in which the wiring device is installed in the embedded box. Figure 10a
10b is a partial plan view, and FIG. 10b is a partial cross-sectional side view. 1... Packaging for embedded wiring equipment, 2... Box body,
3... Flange body, 4... Cylindrical body, 5... Wiring device, 6...
... Reinforcement plate, 7 ... Thin wall part of cylinder, 9 ... Plate, 16 ... Construction material, 17 ... Hole provided in construction material, 18 ... Scissor metal fittings, 20 ... Hole for fixing scissor metal fittings, 21... Thin wall part of the hole for fixing scissor fittings.

Claims (1)

[Claims] 1. A box body configured to house an embedded wiring device inside, a flange body formed integrally with the box body, and a flange body provided at the bottom of the box body so as to protrude inward from the back surface. Each has a cylindrical body in which a thin wall portion is formed to block communication between the inside and outside of the box body, and the flange is inserted into the hole provided in the construction material so that it is located between the plate and the construction material. A packing for an embedded wiring device that is embedded to prevent gas from leaking from the hole, and a hole for inserting and locking a scissor fitting that is designed to sandwich the construction material with the collar body. A package for an embedded wiring device, characterized in that the hole is covered with a thin section.