CN2107724U - Junction Box - Google Patents

Abstract

A junction box embedded in a concrete wall or floor slab is characterized in that a body, a routing pipe sleeve, a fixing lug and a fixing column for installing an external assembly are integrally manufactured by an injection molding method or other methods. The arrangement combination of the routing pipe sleeve, the fixing lug and the fixing column can be configured according to requirements. The joint of the sleeve hole of the wiring pipe and the side wall of the body is provided with a sealing plate to prevent concrete slurry from permeating into the wiring pipe during pouring, and the sealing plate is connected with the side wall of the body through a connecting rib which is easy to remove. A hexagonal copper nut is mounted with clearance in the fixing post to accommodate the mounting error, and the hole is sealed with an end sealing plug to prevent the penetration of the slurry. The fixing lug is arranged outside the body to facilitate the fixing operation.

Description

The utility model relates to a junction box, in particular to a junction box embedded in concrete or reinforced concrete walls or floor slabs for concealed wire connection in the construction industry.

Embedding junction boxes in cast-in-situ or prefabricated walls or floors for concealed wiring or for installing electrical switches or other components has long been known in the construction industry. The earliest use was the junction box made of iron sheet. The disadvantage of this iron box is that it is easy to rust, and the threaded hole made by the flange is easy to slip and buckle, and it is easy to deform, which leads to inaccurate positioning of the external components and affects the appearance; and there is no Set the device fixed on the formwork, so it cannot be accurately fixed in place on the formwork, and accessories such as fixing clips must be added to fix the junction box to the formwork. Not only does it require additional accessories, but it is also very difficult to find the fixing position , time-consuming accident. After improvement, a plastic junction box made of high-strength modified polyvinyl chloride was designed. Representative is the product of British Ega company. Although this plastic junction box eliminates the rust and easy deformation of the iron junction box, the lengthened plastic thread part is still not strong enough, and the problem that it cannot be positioned on the template still exists. Although this kind of plastic junction box has a detachable sealing plate originally intended to prevent the concrete slurry from penetrating into the wiring pipe when it is poured in the wiring hole when it is produced, but an additional sealing plate is installed for the convenience of wiring. After the cable tube is sleeved, the sealing plate is removed. In this way, the concrete slurry will seep into the conduit when pouring. To prevent this phenomenon from occurring, additional blocking measures will be taken, which will directly lengthen the preparation time, which takes a lot of labor and materials, and increases the production cost.

The purpose of this utility model is to provide a junction box that is convenient for positioning and operation, ensures that the concrete slurry is prevented from entering the wiring pipe during pouring, has relatively low requirements for the cooperation of externally installed components after pouring, and is equipped with facilities that facilitate and accurately fix in place .

The utility model takes the following measures structurally to achieve the above object. Firstly, the wiring tube sleeve is integrally made on the junction box body, and reinforcing ribs are set on the outer edge of the wiring tube sleeve for reinforcement, and a removable sealing plate is set at the junction of the wiring tube sleeve and the junction box body to Prevent concrete slurry from penetrating into the conduit during pouring. There are lugs with holes as a fixing device on the outside of the body so that the junction box can be accurately fixed on the template with nails or the like, and ribs are provided to strengthen the lugs. Use additional movable copper nuts to fit into the mounting holes of the exterior components with gaps and block them with plugs at the back to facilitate installation and adjustment, improve the accuracy of installation positioning, ensure neat and beautiful appearance, and prevent concrete slurry from seeping in from the back when pouring . This kind of structural improvement basically solves the problems that have always existed in this embedded junction box at one stroke, and reduces the production cost. At the same time, the arrangement and combination of the number and installation positions of the wiring tube sleeves of the junction box, the fixing lugs and the fixing column devices for installing the external components can be provided according to requirements, so as to adapt to different usage situations.

Now in conjunction with accompanying drawing, the utility model is described in detail. In the attached picture,

Fig. 1 is the top view of the junction box body of the prior art after two additional wire sleeves are housed,

Fig. 2 is a cross-sectional view of a prior art junction box taken along line I-I of Fig. 1,

Fig. 3 is a partial cross-sectional view of the mounting hole of the exterior assembly taken along the line II-II of Fig. 1,

Fig. 4 is the top view of the first embodiment of the junction box of the present utility model,

Fig. 5 is a half-sectional view of the junction box taken along the line V-V of Fig. 4,

Fig. 6 is a partial cross-sectional view of the installation hole of the exterior assembly taken along the line VI-VI of Fig. 4,

Fig. 7 is the view seen along the arrow A of Fig. 4, shows the connecting rib and the arc-shaped slot of the sealing plate,

Fig. 8 is a top view of the second embodiment of the junction box of the present invention,

Fig. 9 is a top view of a third embodiment of the junction box of the present invention,

Fig. 10 is a top view of the fourth embodiment of the junction box of the present utility model,

Fig. 11 is a top view of the fifth embodiment of the junction box of the present invention.

Figures 1, 2 and 3 show a prior art junction box. It can be seen from Figures 1 and 2 that the cable conduit sleeve and the body are two parts. It can be seen from Figure 2 that there is a sealing plate on the unused outlet on the left side, and there is no sealing plate on the outlet on the right side where the wire pipe sleeve is installed, which cannot guarantee the concrete grout when pouring. will not enter the conduit. Fig. 3 shows the situation of the mounting screw holes of the exterior assembly manufactured integrally with the plastic body, mainly indicating that the mounting screw holes are plastic screw holes.

4, 5 and 6 show the first embodiment of the junction box of the present invention. In this first embodiment, the junction box body 1 and the four conduit sleeves 2 are integrally formed by injection molding or other methods. It can be seen from Fig. 5 that a sealing plate 3 is provided at the junction of the sleeve hole of the wiring pipe and the side wall of the main body, so that the junction box can ensure that the concrete slurry will not penetrate into the wiring pipe when pouring. The sealing plate is connected with the side wall of the main body through three or four narrow connecting ribs 4 and is made by injection molding or other methods. It is designed to facilitate the removal of the sealing plate after pouring, and its outer circle is a circle corresponding to the aperture of the sleeve. The curved slots 5 are drawn exaggerated for clarity (see Figure 7). The wire pipe sleeve is provided with reinforcing ribs 6 on the outer periphery. It can be seen from Figure 6 that there is a hexagonal deep hole in the fixing column 7 of the main body for installing the external assembly, and a hexagonal copper nut 8 is installed with a gap in it to ensure that it is not easy to slip when installing the external assembly. Plug 9 seals to prevent concrete slurry from penetrating in the screw thread of nut when pouring. The clearance fit between the hexagonal hole and the hexagonal copper nut ensures that even if the body moves slightly during pouring, the exterior components can be installed accurately and neatly in the desired position. It can be seen from Fig. 4 that the lugs 10 with holes provided for fixing the junction box on the formwork are arranged on the outside of the body and reinforced with ribs, which solves the problem that the junction box itself cannot be fixed reliably and accurately in the prior art Place the question on the template.

8 to 11 respectively show the second to fifth embodiments of the junction box of the present invention with three, two or single conduit sleeves. The structure is exactly the same, only the number and setting positions of the protruding wire tube sleeves are different.

To sum up, the utility model basically eliminates all the defects of this type of junction box in the prior art, and provides a relatively complete embedded junction box. Of course, the use of this junction box is not limited to being embedded in concrete walls or floors, and it can also be installed on the roof with a suspended ceiling to be used as a junction box for pipeline routing. Of course, it can also be used as a junction box for open wiring in industrial plants or machine rooms that do not require a beautiful appearance.

Claims (1)

1, a kind of terminal box that in building industry, is embedded in concrete or armored concrete wall or the floor, it has a body, one or more cabling pipe box tube and outer arrangement is installed screw, it is characterized in that the fixed leg (7) of body (1), cabling pipe box tube (2), the outer arrangement of installation of terminal box and the attaching clamp as fixture (10) that has a fixing hole are by injection moulding or the integrally formed integrated member of other manufacture method; The number of the fixed leg device of the cabling pipe box tube of terminal box, attaching clamp and the outer arrangement of installation can provide by different requirements with the permutation and combination that the position is set; Cabling pipe sleeve hole and body sidewall junction are provided with hush panel (3), it connects together with the body sidewall by three or four narrow company's muscle (4), also be integrally formed, even leave its cylindrical and the corresponding circular arc-shaped slits in cabling pipe box tube aperture (5) between muscle so that after pouring, remove hush panel with body; Cabling pipe box tube is provided with reinforcement (6) on periphery; Have a hexagon deep hole in the fixed leg (7) of the outer arrangement of installation, interband unoccupied place is equipped with one six side's copper screw cap (8) and is used the embolism (9) of end-blocking to seal subsequently in it; Terminal box is held in place in lug (10) on the template to be located at the body outside and to strengthen with reinforcement.

Images