JPH088739B2 - Floor-embedded junction box for floor wiring cable - Google Patents

Description

Description: [Industrial field of application] The present invention relates to a floor embedding useful when a cable wired on a floor in a building or the like is pulled into the floor and is connected to a cable embedded in the floor. Regarding connection box.

[Conventional technology]

 FIG. 4 shows a floor-embedded junction box conventionally proposed.

The connection box 1 is provided with a connection box main body 2 that opens upward and accommodates a connection terminal block, and an upper lid 3 that closes an upper opening of the connection box main body 2. Shelf board 5 with screw holes 4, 4 ... on the side wall near the opening
Is provided, and the upper lid 3 is fixed to the opening of the connection box body by screwing the screws 7,7 ... Through the through hole 6 of the upper lid into the screw holes 4,4. is there.

Thus, the upper lid 3 has a lateral opening 3a formed by cutting a part of the side wall thereof, and an eaves-like piece 3c protruding on the same plane as the upper plate 3b is provided above the lateral opening 3a.

As shown in FIG. 5, the junction box constructed in this manner has an upper lid 3 mounted on the junction box main body 2, and further covers the lower lateral opening 3a of the eaves-shaped piece 3c so that the front side of the eaves-shaped piece 3c. A spacer 8 protruding from the floor is provided so that it can be embedded in concrete 9 that forms the floor in such a state. After the concrete 9 has sufficiently hardened, the spacer 8 is removed, and the spacer 8 is removed to remove it from the floor top surface 9a. The concave portion 10 connected to the lateral opening 3a was formed. Therefore, the cable wired on the floor upper surface is drawn into the junction box through the lateral opening 3a by using the concave portion 10 as an approach.

Reference numeral 11 is an insertion hole to which the electric wire tube directly embedded in the concrete 9 is attached and the cable in the electric wire tube is drawn.

[Problems to be solved by the invention]

According to the connection box having such a configuration and in use, since the lower edge of the lateral opening 3a serving as the cable inlet becomes the upper opening edge of the connection box main body 2, there is a protrusion from the concrete surface and an obstacle to the cable. In order to prevent this from happening, when the junction box body 2 is embedded in the concrete 9, adjustment is made so as to match the floor surface level after being embedded in the concrete, and the concrete is driven in. It was extremely difficult to drive it in, and the level adjustment became more difficult because the concrete contracted after hardening.

In view of the above-mentioned problems of the prior art, the present invention provides a floor-embedded junction box of this kind that does not require the embedding alignment of the junction box itself for retracting a floor wiring cable when embedding the junction box in concrete. For the purpose of provision.

[Means for solving problems]

In order to achieve such an object, the floor-embedded junction box according to the present invention comprises a junction box main body for accommodating a junction embedded in the floor, an upper lid provided in an upper opening of the junction box main body, and the upper lid. And an inner lid provided between the connection box body and the connection box body, wherein the connection box body has a height adjuster extending toward the upper opening therein, and the inner lid has the connection The box body has a board portion mounted on the height adjuster and an approach portion for guiding a floor wiring cable supported by the board portion, and the upper lid corresponds to the approach portion of the core. Has a notch and has a surface corresponding to the upper surface of the approach portion by being placed on the substrate portion, and the inner lid and the upper lid are moved by the vertical movement of the height adjuster. The approach part of the Is made is configured to be compatible with the A wiring levels.

Such a height adjuster, for example, using a screw rod,
It can be constructed by vertically threading it on a lateral wall protruding in the connection box body or by screwing it from above into a stud standing on the inside of the connection box.

〔Example〕

FIG. 1 and FIG. 2 show a preferred embodiment of the seed bed embedded junction box according to the present invention. The given connection box JB is composed of a connection box main body 20, an upper lid 30, and an inner lid 40 provided between them, and the structure of each part is as follows.

First, the connection box main body 20 has a volume sufficient for accommodating a connection terminal block, and is low and has an opening on the upper side, and a shelf plate 21 serving as a lateral wall is projected on the inner surface of the side plate by welding or the like. is there. This shelf board 21 has a plurality of height adjustment screws 22, 22 ,.
-Is vertically threaded from top to bottom.

The screw 22 is preferably a round machine screw having a spherical head so that the screw 22 can be operated from above via an inner lid placed on the screw.

The inner lid 40 is composed of a rectangular frame-shaped substrate 41, and a substantially V-shaped cable guide plate 42 superposed and fixed on the plate portions 41a, 41a facing each other on one side of the substrate by welding or the like. The guide plate 42 forms an upper surface portion 42a having a plate thickness higher than the upper surface of the substrate 41 by such fixing and a sloped surface portion 42b extending continuously to the upper surface portion 42a. The upper surface portion 42a and the sloped surface portion 42a are formed. 42b is the approach part of the cable. A plurality of through-holes 43, 43 ... Are formed in the plate portions 41b, 41b facing each other on the other side of the substrate 41, and the hole diameter thereof is such that a tool such as a screw shaft or a screwdriver can be inserted therethrough. It suffices that the head 22a of the height adjusting screw 22 is half-fitted and locked.

The upper lid 30 is made of a plate material having a flat surface 31 with a width that closes the upper opening of the junction box body 20, and a notch 32 corresponding to the cable guide plate 42 in relation to the inner lid 40, 32
Are provided, and a plurality of through holes 33, 33 ... Are similar to the through holes 43 in the overlapping portion on the plate portions 41b, 41b having the through holes 43.
Are formed.

The connection box configured as described above is completed as a predetermined connection box by sequentially assembling the inner lid 40 and the upper lid 30 with respect to the connection box main body 20 so as to close the upper opening of the connection box main body 20, but is directly embedded in concrete. Only the junction box body 20 need be fixed.

That is, as shown in FIG. 2, the connection box body 20 is embedded in the floor GL formed by hardening concrete to set the connection box at a predetermined position.

In order to set the inner lid 40 from the upper opening of the junction box body 20 thus embedded, the height adjusting screw 22
The head portion 22a is fitted into the through hole 43 of the plate portion 41b for positioning. In this state, a screwdriver or the like is used to adjust the screwing degree of the height adjusting screw 22 through the through hole 43, whereby the upper surface portion 42a of the cable guide plate 42 and the concrete floor GL surface are aligned. This kind of level adjustment does not have a direct fixed relationship with the concrete, but is performed on the inner lid 40 that can be freely attached and detached.
It can be carried out without substantial processing of GL.

After this level adjustment is completed, the flat plate-shaped cable C placed under the carpet FC laid on the floor GL surface and laid on the floor GL surface serves as the approach surface of the cable guide plate 42.
The upper surface part (42a) and the sloped surface part (42b) are made to crawl and drawn into the connection box main body (21), and the connection terminal block is used for connection to the cable which is passed through the electric wire tube which is directly buried in the concrete floor (GL).

After the above connection is completed, the upper lid 30 is placed on the inner lid 40 whose level has been adjusted. The upper lid 30 is provided so that its own notch 32 is spaced apart and opposed to the cable C so as not to damage the cable C to be pulled in, and by mounting in this way, the flat surface 31 is guided by the cable guide. Board
It is located on the same plane as the upper surface 42a of 42, and as a result, the floor GL
Is matched to the face.

In this way, by pulling the cable C into the floor GL and using it for connection, the cable C crawling on the floor GL can be safely pulled in through the approach surface whose level matches the floor, and By pulling in, it is possible to clean up the ridges that tend to occur on the floor GL surface, eliminating the factors that cause pedestrians to stumble and inadvertently injure the cable.

Reference numeral 50 denotes an assembling screw threaded to the shelf plate 21 of the connection box body 20 through the through hole 33 of the upper lid 30 and the through hole 43 of the inner lid 40.

FIG. 3 shows another embodiment of the floor-embedded junction box according to the present invention, and the portions common to those in FIG. 1 are designated by the same reference numerals.

In this embodiment, a screw 22 for mounting the inner lid 40 and adjusting the height is screwed from above into a stud 60 that is planted so as to stand on the bottom surface in the connection box body 20. It is a thing.

By screwing the screw into the stud 60 in this way,
Since the studs 60 are provided at the four corners of the connection box body 20, there is an advantage that a sufficient connection internal space of the connection box can be provided and the connection work can be easily performed.

In addition, 61 is a stud into which the screw 50 for fixing this to the connection box body 20 is screwed through the upper lid 30 and the inner lid 40.

〔The invention's effect〕

As will be apparent from the above description, according to the floor-embedded junction box for floor wiring cable of the present invention, it is not necessary to adjust the height when the junction box is embedded in the floor, and it is indirectly attached to the floor. Since it is performed on the lid, it is very easy to adjust the level of the cable entry part, and there is no need to process a concrete floor to draw the cable into the junction box. Also, since the obstructing surface of the junction box can be left flat, it is possible to eliminate the factor that causes the pedestrian to stumble, and it is also advantageous in terms of protecting the junction box.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a floor-embedded junction box for floor wiring cables according to the present invention, FIG. 2 is a sectional view partially showing an installation situation of the junction box, and FIG. FIG. 4 is an exploded perspective view showing another embodiment of the floor-embedded junction box for floor wiring cable of FIG. 4, FIG. 4 is an exploded perspective view showing an example of a conventional floor-embedded junction box for floor wiring cable, and FIG. It is sectional drawing which shows the installation condition of a box partially. −Explanation of symbols− JB: Junction box, 20: Junction box body 22: Height adjustment screw, 30: Top lid 31: Surface, 32: Notch, 40: Inner lid 41: Board, 42: Cable guide plate 42a: Top surface Part, 42b: Sloping surface part (approach part) GL: Floor, C: Floor wiring cable

Claims (3)

[Claims] 1. A floor-embedded junction box for pulling in a cable to be connected to a floor and connecting the cable to the cable in the floor.
A connection box main body for accommodating the connection part embedded in the floor, and an upper lid provided in the upper opening of the connection box main body,
An inner lid provided between the upper lid and the connection box main body is provided, and the connection box main body has a height adjuster extending toward the upper opening inside thereof. The junction box body has a board portion mounted on the height adjuster and an approach portion for guiding a floor wiring cable supported by the board portion, and the upper lid is the approach portion of the core. Has a notch corresponding to the above, and has a surface corresponding to the upper surface of the approach portion by being placed on the substrate portion, and the inner lid and the upper lid move up and down the height adjuster. The floor-embedded junction box for a floor wiring cable, characterized in that the approach portion and the surface corresponding to the approach portion are configured so as to be adapted to the floor wiring level. 2. The floor-embedded connection for a floor wiring cable according to claim 1, wherein the height adjuster is constituted by a screw screwed into a lateral wall of the connection box body itself. box. 3. The floor-embedded floor wiring cable according to claim 1, wherein the height adjuster is constituted by a screw screwed from above into a stud standing in the connection box body. Connection box.