JPH0338574Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a connection box for a floor heater that is installed on the floor to heat a room.

[Conventional technology]

A conventional floor heater that heats a room from the floor surface has a plurality of floor heaters A, A' arranged in contact with each other on the floor surface, as shown in the plan view of FIG. In order to connect the internal wires connected to the resistive heating elements of the heaters to the power cord, connection boxes 10 as shown in the fifth figure are installed at both corners of each floor heater A, A' as shown in the sixth figure. To connect the internal power distribution line a connected to the resistance heating element of the floor heater A to the power cord b, crimp the joints of the plurality of power cords b and the plurality of internal power distribution lines a with a connecting sleeve. Connect with 12
A PVC tape 13 is wound to provide insulation reinforcement, and this connection is housed in a connection box 10 installed at one corner and covered with a lid 11 as shown in the fifth figure.

In addition, a floor heater adjacent to floor heater A
To connect the plurality of lead wires c connected to the resistance heating element A' to the power cord b, connect the internal power distribution line a of the floor heater A connected to the power cord b at the adjacent floor heater A. for,
By connecting the lead wire c of the floor heater A', the lead wire c of the floor heater A' is indirectly connected to the power cord b. Similarly, connect the connection part with the crimp connection sleeve 12.
A PVC tape 13 is wound to provide insulation reinforcement, and this connection part is housed in a connection box 10 installed at the other corner and covered with a lid 11.

[The problem that the idea attempts to solve]

The top surface of the connection box as described above must be flush with the top surface of the floor heaters A and A' arranged on the floor, but the multiple internal power distribution lines a and power cord b in the conventional connection box 10 connection part with multiple lead wires c and internal distribution line a
The connection part becomes thicker due to the PVC tape-wrapped insulating reinforcing layer 13 on the crimp connection sleeve 12, and the connection box that accommodates a plurality of these thick connection parts becomes large, and the top surface of the connection box has a large height. A problem arises in that a step is formed between the top surface of the floor heaters A and A', and in order to eliminate this step, the thickness of the floor heaters A and A' must be made the same as the height of the connection box.

In order to store the connection part so that the top surface height of such a connection box is the same as the thickness of the floor heater, an auxiliary box is fitted into the bottom opening of the joint box and protrudes from the underside of the floorboard. A floor heating panel with a cord insertion hole on the side of the box is known from Utility Model No. 57-50614, but in this case, the cord insertion hole provided on the auxiliary box is exposed on the underside of the floorboard, and wiring work is required. All of this has to be done below the floorboards, so there is a drawback that it is not possible to install a floor heater on top of the existing floorboards.Also, hollow joint boxes in areas where the connections are not stored also have hollow auxiliary boxes on the bottom. A large protruding cavity is formed, which not only reduces the strength and cannot withstand the heavy load of furniture placed on the floor.
This cavity resonates with indoor sounds and becomes a source of noise amplification.
Furthermore, there is a drawback that cold air flows through this cavity, reducing heating efficiency.

The present invention eliminates the need to perform wiring work under the floorboard as described above, does not create a large cavity even if the connection part is not stored, and can withstand the heavy load of furniture placed on the floor. It is an object of the present invention to provide a connection box for a floor heater whose strength is increased so that it can be used.

[Means to solve the problem]

In order to achieve the above object, the floor heater connection box of the present invention has an auxiliary box 3 that is tall enough to fit into the connection box main body 1 and is removably inserted into the fitting hole 2 on the bottom of the connection box main body. A connection box with sleeve pieces 4 on both sides of the opening edge placed on the edge of the fitting hole 2 is installed at one corner of the floor heaters A and A' arranged side by side on the floor, and the resistance heat generation of each floor heater is a plurality of internal power distribution lines a connected to the element;
The connection part where the lead wire c and the plurality of power cords b are connected with the compression sleeve 6 and the insulation reinforcement layer 7 wrapped with PVC tape is stored in the auxiliary box 3, covered with the lid 5, and the connection part is closed. An auxiliary box 3 is stored upside down in the connection box main body 1 which is not stored, and a lid 5 is placed over it.

[Effect]

By storing each connection part in the auxiliary box 3 of the connection box, the many connection parts of all the wiring of floor heaters A and A' placed side by side on the floor can be safely stored, and the connection wiring work can be carried out. There is no need to do it under the floorboards.

By setting the auxiliary box to a height that fits inside the connection box body, and storing the auxiliary box upside down inside the connection box body without storing the connection part, the connection box will be strong enough to withstand the load of furniture placed on the floor. Strength is increased.

Furthermore, since there is an auxiliary box inside the connection box main body where the connection part is not housed, no cavity is formed through which cold air flows, so heating efficiency is not reduced, and no resonant cavity for indoor noise is formed.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. Fig. 1 shows a cross section of the connection box of the floor heater of the present invention, 1 is the connection box body made of steel plate or reinforced plastic, and the bottom surface has a fitting hole 2.
is provided, and the upper opening is closed with a cover plate 5.

Reference numeral 3 denotes an auxiliary box made of a steel plate or reinforced plastic, and its height is set so that it can be stored inside the connection box main body 1 whose upper opening is closed with a cover plate 5, and the opening edge opening upward is Sleeve pieces 4, 4 are provided on both sides of the sleeve.

Fit the auxiliary box 3 into the fitting hole 2 on the bottom of the connection box main body 1, and insert the sleeve pieces 4, 4 on both sides of the upper opening edge of the auxiliary box 3 onto the hole edge of the fitting hole 2 on the bottom of the connection box main body. The auxiliary box 3 is removably attached to the connection box body 1 by being placed and locked on the connection box body 1.

As shown in the plan view of FIG. 2 and the sectional view of FIG. 3, the connection box in which the auxiliary box 3 is attached to the connection box main body 1 as described above can be used as a floor heater A, which is laid side by side in contact with the floor surface. Install at the corner of each side of A′.

Reference numeral 8 in the third figure indicates a floor material portion, and 9 is an auxiliary box storage groove provided in advance in the floor plate 8 in order to fit and accommodate the auxiliary box 3 projecting below the connection box. The auxiliary box 3 of the connection box installed on the side edge of the floor heater is fitted and stored in this storage slot 9.

A plurality of internal power distribution lines a connected to the resistance heating element of the floor heater A are connected to a plurality of power cords b using crimp connection sleeves 6, and a
A PVC tape-wound insulating reinforcing layer 7 is provided, and this connection portion is housed in the auxiliary box 3 of the connection box installed on the right in FIGS. 2 and 3, and covered with the lid 5.

Also, the plurality of lead wires c connected to the resistance heating elements of the floor heater A' arranged adjacent to the floor heater A are connected to the plurality of internal power distribution wires a of the floor heater A with the crimp connection sleeve 6. connection,
By providing and connecting the PVC tape-wound insulating reinforcing layer 7 thereon, the lead wire c of the floor heater A' is electrically connected to the power cord b side via the internal power distribution wire a. This connection part is housed in the auxiliary box 3 of the connection box installed on the left side in FIGS. 2 and 3, and covered with the lid 5.

By storing each connection part in the auxiliary box 3 of the connection box as described above, a large number of connection parts of all the wiring of the floor heaters A and A' arranged side by side in contact with the floor surface can be safely stored. This eliminates the need for wiring work under the floorboards.

In addition, in locations where there are no connecting parts to be stored in the connecting box installed as described above, the auxiliary box 3 is stored upside down in the connecting box body 1 that does not store the connecting parts, as shown in the fourth figure. Lid body 5
cover. The height of this auxiliary box 3 is set so that it can be stored inside the connection box body 1, so when it is placed upside down inside the connection box body 1, the bottom plate of the auxiliary box 3 will open as shown in Figure 4. As a result, the strength of the connection box body 1 against the load is increased, so that it can withstand large loads such as furniture placed on the floor. In addition, even if the connection part is not housed in the connection box body 1, there is an auxiliary box 3 inside and a large cavity is not formed, so there is no resonant cavity for guidance noise as in conventional products, and the inside of the cavity is Because cold air does not flow through the system, there is no reduction in heating efficiency like with conventional products.

[Effect of idea]

As mentioned above, in the present invention, an auxiliary box is removably attached within the main body of the connection box, and this connection box is installed on the floor heaters arranged side by side on the floor surface, and the connection part of the floor heater wiring is housed in the auxiliary box. Therefore, the numerous connections of all the wiring of the floor heaters arranged side by side on the floor can be safely stored, and there is no need to carry out wiring work under the floorboard as in the past.

In addition, the height of the auxiliary box is set so that it can fit inside the connection box body, and the auxiliary box is stored upside down inside the connection box body that does not store the connection part, so the strength of the connection box body is increased and it can be used for large objects such as furniture. It can withstand loads, and since no cavity is formed inside the connection box body through which cold air can circulate, it not only does not reduce heating efficiency like conventional products, but also reduces indoor noise like conventional products. The formation of resonant cavities can be prevented.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of a connection box according to an embodiment of the present invention, Fig. 2 is a plan view of an embodiment of the invention, Fig. 3 is a longitudinal sectional view thereof, and Fig. 4 is a longitudinal sectional view of a connection box according to an embodiment of the present invention. A longitudinal cross-sectional view of the auxiliary box in a state where it is stored upside down, and FIGS. 5 and 6 are views showing a conventional example. 1... Connection box body, 2... Fitting hole, 3...
...Auxiliary box, 4...Sleeve piece, 5...Lid, 6...
...Compression sleeve, 7...PVC tape-wrapped insulation reinforcement layer.

Claims (1)

[Scope of utility model registration request] The auxiliary box 3, which is tall enough to fit inside the connection box main body 1, is removably inserted into the fitting hole 2 on the bottom of the connection box main body, and the sleeve pieces 4 on both sides of the upper opening edge of the auxiliary box are inserted.
A connection box placed on the edge of the fitting hole 2 is installed at the corner of one side of the floor heaters A and A' arranged side by side on the floor, and is connected to the resistance heating element of each floor heater. A plurality of internal distribution lines a, lead wires c, and a plurality of power cords b are connected with a compression sleeve 6, and each connection portion provided with a PVC tape-wrapped insulation reinforcing layer 7 is housed in the auxiliary box 3. Lid body 5
Connection box body 1 that covers the
Inside is a floor heater connection box with an auxiliary box 3 stored upside down and a lid 5 covering it.