JPS58175908A - Dew condensation preventing device for wiring box - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dew condensation prevention device for wiring boxes, and is mainly used to prevent dew condensation in various types of wiring boxes installed embedded in the framework of concrete buildings such as pillars. This invention relates to a dew condensation prevention device for a wiring box that is capable of removing poor insulation inside the wiring box and stains on the interior wall material surface caused by water pressure condensation.

Conventionally, in the case of concrete frames in building structures, especially concrete buildings such as buildings that are highly airtight, there is a very large temperature difference between the outer wall surface that is in contact with the cold outside air and the heated inner wall surface. Condensation would form on the inner surfaces of the side walls and bottom walls of various wiring boxes that were embedded in the building blocks and exposed on the inner surfaces of the walls. This condensation can lead to poor insulation and corrosion inside the wiring box, as well as staining the interior wall surface, and this is especially noticeable in cold regions during the winter. be. Moreover, once condensation occurs, it is extremely troublesome to remove it, maintenance and inspection are not easy, and it is virtually impossible to effectively prevent condensation.

That is, as shown in Fig. 4, the wiring box B, such as an outlet box, which is embedded in the frame C during the construction of a concrete building, is directly embedded in the frame C in an exposed manner, so that the outside A is exposed to the outside air. On the other hand, the inside part is affected by the indoor temperature through the interior dripping material W and the mounting frame T for the outlet, switch, and TV terminal. Therefore, in cold regions etc., wiring box 8
Since the convexity of the side and bottom walls is low on the outside and high on the inside, the moisture present inside the room will adhere to the inside surfaces and cause condensation, resulting in the various inconveniences mentioned above. Ta.

Therefore, the present invention was created in view of the above points, and covers the outside of the wiring box embedded in the concrete frame with a heat insulation cover made of a heat insulating material to eliminate the influence of outside air.
In addition, at the opening of the wiring box, a cylindrical coating cover is installed between the inner surface of the structure and the back of the interior wall to prevent the intrusion of cold air convection into the space behind the interior wall that is indirectly affected by outside air. The dew condensation phenomenon can be effectively prevented by removing the moisture and creating an atmosphere with almost the same temperature inside and outside the wiring box.

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 3.

The reference numeral 1 shown in the figure is a substantially box-shaped cover 1 made of a heat insulating material, and is a predetermined outlet box buried in a wall portion of a concrete building frame C1, for example.
Side wall of embedded wiring box B such as a switch box,
It is formed to cover the outside of the bottom wall. This heat insulating cover 1 is made of styrene foam with excellent heat insulation properties, has a wall thickness of about 10 to 2 ohm, and has a wiring box B tightly housed inside and a cable for use in the wiring box BK. A continuous wire insertion hole 2 through which a wire passing material P such as a conduit or a directly buried cable is passed is drilled in the side so as to correspond to the knockout N position of the wiring box B. (See Figure 2).

In addition, 3 is a paint allowance cover that is fixed to the opening of wiring box B, and switches and electrical outlets that are fixed to interior wall material WK)
- Equipped with a cylindrical frame part 5 in which a wiring insertion opening 4 is opened for cable connection to the TV terminal, forming a plate 6 to be attached to the opening of the wiring box B, and distributing power to the front of the 0 side of the building frame. A cylindrical soft material cover #JT whose opening edge protrudes from the back side of the interior wall material W is connected to the cylindrical frame portion 5, and a cuttable soft material closure that closes the wiring insertion opening 4. It is made by stretching a membrane 9.

This coating allowance cover 3 is made by using a conventionally used plate 6 as a plate 6, and covering the plate 6 with a soft material such as polyvinyl chloride resin by molding it into a predetermined shape. This is obtained by covering the peripheral cover part 10 and the entire cylinder frame part 5 with a covering part 12, which is integrated with the plate 6 through the covering part 12 in this way. , the cover tube T can be connected to the tube frame portion 5. Moreover, since the cover part 10 is covered with the covering part 12, when the cover part 10 is fixed to the wiring box B using the screw holes 11 and the fixing screws 13 drilled in the cover part 10, the cover part 10 is covered with the covering part 12. The covering part 12 closes even the slightest gap at the opening edge of the wiring box B, and serves as a trap to prevent cold air from entering.

The cover m7 approximately matches the opening shape of the cylinder frame portion 5, and is formed slightly longer than the distance from the opening end of the cylinder frame 1@S5 to the back surface of the interior wall material W, and the opening edge is shaped as shown in the figure. The abutment edge 8 expands outward to improve adhesion when abutting against the back surface of the interior wall material W and prevent cold air from entering.

The occlusive membrane 9 is incised using a knife, cutter, or other general-purpose cutting tool to form an insertion gap '@14 for guiding the cable in the wiring box or box B to the switch, outlet, or TV terminal. It has a wall thickness as large as possible, is formed integrally with the covering tube 7 or the covering part 12, and is stretched over the wiring insertion opening 4.

In the figure, reference numeral 15 denotes a screw hole formed in the cylindrical frame portion 5 into which a set screw 16 is screwed in order to screw the decorative cover F mounted on the mounting frame T into which the outlet, switch, and TV terminal are assembled.

The present invention is constructed as shown on paper, and when used, as shown in FIGS. The covered part B is connected to a wiring material P such as a conduit or a directly buried cable, and is appropriately fixed by being embedded in the concrete body C, for example. Attach the wiring box B to the wiring box B. After that, attach the laminate made of hard urethane resin material and gypsum board material to the open end of the cover tube 5 of the coating allowance cover 3, preferably to the outside. Set the interior wall material W of the structure, screw the installation hole OK opened in this interior wall material W, the mounting frame T in which the outlet, switch, TV terminal, etc. are incorporated, and the decorative cover F, and also remove the paint allowance cover. A predetermined connection is made to the cable inserted through the insertion gap 14 obtained by cutting the occlusive membrane 9 of No. 3.

Therefore, the inside of the wiring box B is not affected by the cold air from the outside of the frame C due to the heat insulation cover 1 made of a heat insulating material that covers the wiring box B, and the cover tube of the paint allowance cover 3 attached to the opening of the wiring box B 5 is a wiring box B for the convection of cold air that occurs in the gap between the building frame C1 and the interior wall materials W.
Since the inside of the wiring box B is prevented from entering, there is no large temperature difference between the inside and outside of the sidewall and bottom wall of wiring box B, and the atmosphere remains the same. Therefore, no condensation occurs inside, and insulation defects and interior walls are prevented. It is possible to reliably prevent staining of the surface of the material W.

In addition, since the heat insulation cover 1 is formed into a substantially box-like shape made of a heat insulating material and covers the outside of the side wall and bottom wall of a predetermined embedded wiring box B buried in the surface C of the building frame, the outside of the wiring box B is completely covered. Therefore, the cold air outside, especially the outside of the frame C, has no influence on the inside of the wiring box B, and the internal temperature can be kept constant.

On the other hand, the coating allowance cover 3 has a cylindrical frame II5 in which a wiring insertion opening 4 is opened, and has a plate 6 attached to the wiring box B opening to cover the wiring box B opening. It can be used and fixed in the same way,
No inconvenience will occur during work. In addition, since a cover tube 7 made of a cylindrical soft material whose opening edge presses against the back surface of the interior wall material W disposed in front of the zero surface of the building frame is connected to the cylinder frame portion 5, the cover tube 7 is connected to the cylinder frame 5. 7 is extremely effective in preventing the convection of cold air generated in the gaps between the interior wall materials W of the building frame C1 from entering into the cover tube 7 and further into the wiring box B. Not only that, even if there is a slight change in the gap between the interior wall materials W of the frame C1, this can be accommodated, and the cover tube 7 open-lo weave can accommodate the interior wall materials W.
It is securely pressed against the back surface, and cold air is always prevented from entering the cover tube 7, so that no large temperature changes occur inside the cover tube T.

Furthermore, since the blockage 119 stretched to close the wiring insertion opening of the cylindrical frame portion 5 almost blocks the opening of the wiring box B, it is possible for the wire to flow in through the mounting opening O1 of the interior wall material W and the mounting frame T, etc. This is effective in preventing indoor warm air from entering the wiring box B, and is effective in removing moisture that causes condensation. Moreover, since the blockage 1 [9 itself is made of a soft material that can be cut open, the same problem may occur when connecting cables to outlets, switches, TV terminals, etc. inside and outside the wiring box B via the wiring insertion opening 4. The workability is also very good.

As explained above, according to the present invention, the outside of the wiring box installed embedded in the building frame is covered with a heat insulating cover, and the wiring cover is installed to prevent cold air convection at the opening. The inside of the box is completely unaffected by the cold air outside the structure, and the occurrence of dew condensation inside is reliably prevented. It reliably removes stains on interior wall materials and can be used for many years in cold regions.

[Brief explanation of the drawing]

Figures 1 to 3 show one embodiment of the present invention, with Figure 1 being a schematic explanatory diagram of the state of use, Figure 2 being a partially cutaway side view of the same, and Figure 3 being a partially cutaway exploded perspective view. , FIG. 4 is a partially cutaway side view of the conventional example. B...Wiring box, C...Structure, F
... Decorative cover, K ... Cable, N
-...Book out, 0...Mounting port, P.
...Tong I! Materials, T...Mounting frame, W...
...Interior wall material, 1...Heat insulation cover, 2...
...Wire insertion hole, 3...Painting allowance cover, 4.
... Wiring insertion opening, 5 ... Cylinder frame, 6.
...Plate, 7... Cover tube, 8...
...Abutting edge, 9...Occluded membrane, 10...
Cover part, 11...screw hole, 12...
... Covered part, 13 ... Fixing screw, 14 ...
...Insertion gap, 15...Screw hole, 16...
・Correct screw. Patent applicant: Presto Industrial Research Institute Co., Ltd. Agents: 2 people including a registered engineer

Claims (1)

[Claims] 1. The wiring box is equipped with a substantially box-shaped heat-retaining cover made of a heat insulating material that covers the side wall and the outside of the bottom of a predetermined embedded wiring box that is buried in the body surface, and a cylindrical frame portion with a wiring insertion opening. An open cover (forms a plate to be attached to the opening of the wiring box, and attaches a cylindrical cover made of soft material whose opening edges are aligned to the back of the interior wall material placed in front of the body surface). A dew condensation prevention device for a wiring box, comprising a coating allowance cover connected to a frame portion and provided with a cuttable plugging film made of a soft material that closes the wiring insertion opening.