Multi-piece integrated CD connector and outlet box setting method using same

Abstract

The present invention relates to a device for installing a wire outlet box required for connecting a CD wire tube embedded in a concrete floor to a heat insulation plate attached to the bottom surface of the floor, the device comprising: a connector body embedded in the heat insulation plate attached to the bottom surface of the floor; and a plurality of CD connection tubes inserted inside the connector body, the CD connection tubes including: a built-in portion located inside the connector body; and a protruding part protruding from the upper surface of the connector body and embedded in the floor.

Description

TECHNICAL FIELD

[0001] The present invention relates to a technology for minimizing damage to a thermal insulation panel attached to a floor bottom surface and improving workability in a process of providing an outlet box required for connecting a combined duct (CD) embedded in a concrete floor to the thermal insulation panel. BACKGROUND

[0002] In order to prevent heat loss in a building, in a case where a thermal insulation layer is formed on a floor bottom surface, a CD electric wire duct embedded in a floor is connected to each electric wire for power supply in a building through an outlet box after penetrating the thermal insulation layer.

[0003] There are a method of attaching a thermal insulation panel to a pre-constructed floor bottom surface after setting a bottom mold and pouring concrete for solidifying a floor, and a method of constructing a floor by attaching a thermal insulation panel in an integrated state after laying a thermal insulation panel on the upper surface of a bottom mold and pouring concrete for solidifying a floor on the upper side thereof, in a manner of forming a thermal insulation layer on a floor bottom surface.

[0004] In the former case, it is difficult to firmly attach a thermal insulation panel to a floor, and it is necessary to form a penetration hole on the thermal insulation panel in accordance with an electric box or a CD electric wire duct embedded in the floor, but it is possible to form excessive penetration holes due to difficulty in accurately positioning the location, and thus there is a problem that condensation occurs around the electric box and the CD electric wire duct.

[0005] Therefore, the latter method of constructing a thermal insulation panel as a unit with a floor is generally mainly used, and in this case, a CD electric wire duct with respect to a thermal insulation panel is provided by the following method.

[0006] An outlet box is fixed to a bottom mold for a floor so that an open port faces a lower portion, and a thermal insulation panel is laid on the upper surface of the bottom mold. In this case, a hole for outlet box installation is formed in the thermal insulation panel to have a diameter of a planar size of the outlet box or more, and thus the outlet box is inserted into the inside of the thermal insulation panel. Subsequently, an end portion of a CD electric wire duct 140 embedded in concrete of a floor is inserted into the outlet box.

[0007] After the insertion into the inside of the outlet box and the installation of the bottom mold through the hole for outlet box installation are completed, if the arrangement of a reinforcing bar on the upper portion of the thermal insulation panel is completed, as shown in FIG. 1C, fire-retardant polyurethane is sprayed into the inside of the hole for outlet box installation and filled by a portion, and the remaining portion of the hole for outlet box installation is filled at the same time as pouring concrete for a floor to complete the construction of the floor. Figure 1

[0008] However, the outlet box installation process based on the prior art has the following problems,

[0009] ​First, the hole for the outlet box is provided with respect to the later filled outlet box, and the thermal insulation layer is formed to be implemented by spraying. However, according to the building law, although all thermal insulation materials used in construction work need to use materials of quasi-incombustible material or more, the spraying construction of the quasi-incombustible material is only targeted at a large area such as a beam or a wall, and there is no device or thermal insulation material of quasi-incombustible material or more that can be filled by spraying for a very small hole. Therefore, as described above, the use of the flame-retardant polyurethane in the outlet box setting hole violates the law, and the possibility of generating toxic gas by combustion cannot be completely excluded.

[0010] Second, since the size of the outlet box setting hole penetrating the thermal insulation plate is not small, in the case where the inside of the outlet box setting hole is entirely filled with the flame-retardant polyurethane, the filling is minimized at the site as a factor of increasing construction costs, and concrete is filled into the remaining space. Thereby, as the thermal insulation performance gradually decreases around the outlet box, the condensation phenomenon of forming water droplets around the outlet box can occur.

[0011] In view of such a problem, recently, a method is adopted in which a thermal insulation plate is perforated by a threaded drill, a CD wire tube is inserted into the hole and laid to a floor mold, a reinforcement is provided and concrete is poured to construct a floor. After the concrete is completely cured, the bottom mold is removed, the thermal insulation plate in which the CD wire tube is provided is excavated to find the CD wire tube, and the CD wire tube is connected to the outlet box using a CD coupling.

[0012] However, the current method causes the thermal insulation plate to be severely damaged, and a large amount of time and cost is consumed for the removal and repair of the thermal insulation material for the portion, and, as shown in Figure 2 the outlet box is in an unstable state of being hung from the ceiling and swinging.

[0013] Prior Art Documents

[0014] Patent Documents

[0015] Patent Document 1: KR 10-1386405 B1 SUMMARY

[0016] To solve the problems of the prior art, the present application aims to provide a multi-piece integrated CD connector and an outlet box setting method using the same, in which, in the process of providing an outlet box to a thermal insulation plate attached to the bottom surface of a floor in order to connect a CD wire tube buried in the floor, not only can the damage to the thermal insulation plate that can occur in the process of providing the outlet box be minimized to prevent the condensation phenomenon caused by the decrease in thermal insulation performance around the outlet box, but also the outlet box can be easily provided to improve the construction quality and shorten the working time.

[0017] To achieve the above object, the multi-piece integrated CD connector of the most preferred embodiment of the present application includes a connector body embedded in a thermal insulation board attached to the bottom surface of a floor, and a plurality of CD connection pipes inserted inside the connector body, the CD connection pipes including an internal portion located inside the connector body, and a protruding portion protruding from the upper surface of the connector body and embedded in the floor.

[0018] The connector body of the most preferred embodiment is configured in a solid circular rod shape except for the insertion port formed in the inside, so that the plurality of CD connection pipes can be inserted in an integrated manner. In this case, a fastening hole can be provided in the solid portion.

[0019] The multi-piece integrated CD connector of the further embodiment of the present application further includes a box fixing socket in the shape of a circular tube body fastened to the lower end portion of the connector body for fixing an outlet box.

[0020] The box fixing socket of the most preferred embodiment is configured of a fastening insertion portion combined with the connector body in a threaded fastening manner by being inserted through an introduction opening provided in the upper plate of the outlet box, and a latching portion having a larger cross section than the introduction opening, the latching portion being latched to the bottom surface of the upper plate of the outlet box when the fastening insertion portion is combined with the connector body in a threaded fastening manner. In this case, an insertion blade can be provided at the front end of the fastening insertion portion, the insertion blade being formed with a tip cross section in which the outer surface is inclined upward toward the inner surface.

[0021] The outlet box installation method of the most preferred embodiment of the present application can include: step a) laying a thermal insulation board on the upper surface of a bottom mold, and perforating the thermal insulation board to form installation holes; step b) inserting the multi-piece integrated CD connector into the installation holes; step c) installing upper and lower reinforcement bars for a floor on the upper surface of the thermal insulation board, and connecting the CD connection pipe protruding portions of the multi-piece integrated CD connector to install a CD wire pipe for floor embedding; step d) after pouring and curing concrete for the floor, removing the bottom mold to expose the lower end surface of the connector body of the multi-piece integrated CD connector; and step e) fixing the outlet box to the lower end surface of the connector of the multi-piece integrated CD connector exposed on the bottom surface of the thermal insulation board.

[0022] In this case, during the fixing of the outlet box through the step e), the box fixing socket is fixed to the outer surface of the connector body in a threaded fastening manner, and the fixing between the connector body and the outlet box can also be achieved by a bolt or a fastening bolt.

[0023] The multi-piece integrated CD connector of the present application is injection molded from quasi-non-combustible material and inserted into a heat insulating plate of quasi-non-combustible material, so that there is no need to perform a spraying work or the like on site, thereby enabling fast construction and maintaining continuity of quasi-non-combustible property of the heat insulating plate.

[0024] Also, in the multi-piece integrated CD connector of the present application, the protruding portion of the CD connection pipe provided inside performs an anchoring function by being embedded and fixed to the floor, so that the outlet box can be firmly and stably provided thereto, and in particular, damage to the heat insulating plate can be minimized, and high airtightness between the heat insulating plate and the multi-piece integrated CD connector can be maintained by the airtight gasket attached to the fastening insertion portion of the box fixing socket and the upper plate of the outlet box, thereby preventing condensation from occurring around the same. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A sectional view of the outlet box of the prior art provided in the state of the heat insulating plate of the floor surface.

[0026] Figure 2 A photograph related to the construction state of the prior art.

[0027] Figure 3 A perspective view of the multi-piece integrated CD connector according to an embodiment of the present application.

[0028] Figure 4 A perspective view of an embodiment of the connector body in the multi-piece integrated CD connector.

[0029] Figure 5 A sectional view of the A-A portion of Figure 3

[0030] Figure 6 A perspective view of the outlet box fixed to the multi-piece integrated CD connector.

[0031] Figure 7 A perspective view of an embodiment of the box fixing socket fixed to the connector body.

[0032] Figure 8 An explanatory diagram of the setting hole forming step of the heat insulating plate in the outlet box setting method of the present application.

[0033] Figure 9 An explanatory diagram of the setting step of the multi-piece integrated CD connector in the outlet box setting method of the present application.

[0034] Figure 10 An explanatory diagram of the reinforcing bar setting step and the CD wire pipe setting step in the outlet box setting method of the present application.

[0035] Figure 11 ​An explanatory diagram for the connector body lower end surface exposure step in the outlet box setting method of the present application.

[0036] Figure 12 An explanatory diagram for an embodiment of the outlet box setting step in the outlet box setting method of the present application.

[0037] Figure 13 An explanatory diagram for another embodiment of the outlet box setting step in the outlet box setting method of the present application. DETAILED DESCRIPTION

[0038] Hereinafter, the most preferred embodiment of the present application will be described in detail with reference to the accompanying drawings. However, in the course of explaining the present application, when a detailed explanation of a well-known structure can possibly confuse the technical idea of the present application or cause the technical idea of the present application to be unclear, an explanation of the well-known structure will be omitted.

[0039] Figure 3 An overall appearance of an embodiment of the multi-piece integrated CD connector 100 of the present application is shown, Figure 4 An embodiment of the connector body 110 in the multi-piece integrated CD connector 100 is shown, Figure 5 A cross section of the A-A portion of Figure 3 is shown.

[0040] As described above, the multi-piece integrated CD connector 100 of the present application is fixedly installed in the heat insulation plate 300 of quasi-incombustible material attached to the bottom surface of the floor 400, and can minimize damage to the heat insulation plate 300 and perform a function of connecting the plurality of CD wire pipes 140 embedded in the floor 400 to the outlet box 200 described later.

[0041] As shown in Figure 3 , Figure 4 , the multi-piece integrated CD connector of the present application is composed of the connector body 110 and the CD connection pipe 120.

[0042] The connector body 110 is embedded in the heat insulation plate 300, and not only protects the CD connection pipe 120 located inside thereof, but also, as the removal range of the heat insulation plate 300 is clearly set, prevents the heat insulation plate 300 from being widely damaged during the work of installing the CD connection pipe 120 in the heat insulation plate 300, and even unnecessary parts, so that the multi-piece integrated CD connector 100 of the present application can be easily installed.

[0043] Further, the connector body 110 also performs a function of a support bracket, so that the outlet box 200 can be stably fixed to the bottom surface of the heat insulation plate 300.

[0044] As the most preferred embodiment of the connector body 110, as shown in Figure 4 ,Figure 5 As shown, a plug-in port 111 is provided inside, and the remaining cross section other than the plug-in port 111 is in the shape of a circular rod.

[0045] As described above, the connector body 110 in the shape of a circular rod provided with the plug-in port 111 has excellent impact resistance, corrosion resistance, and durability, and can be injection molded from hard PVC. Therefore, the spraying work required in the prior art is not necessary, and the use of non-standard non-combustible materials for the flame-retardant polyurethane foam is completely eliminated.

[0046] The CD connection pipes 120 inserted inside the connector body 110 are provided with a number corresponding to the CD wire pipes 140 connected thereto, and the plurality of CD connection pipes 120 can be bundled to form an integral body through the plug-in port 111.

[0047] The plurality of CD connection pipes 120 each include an internal portion 120A located inside the connector body 110 and a protruding portion 120B protruding from the upper surface of the connector body 110 and embedded in the floor 400.

[0048] The protruding portion 120B embedded in the floor 400 performs an anchoring function on the connector body 110, and can prevent the multi-piece integrated CD connector 100 of the present application from being detached from the insulation board 300 and stably maintaining the position.

[0049] As shown in Figure 3 , Figure 5 Preferably, in order to further effectively perform the anchoring function and simplify the connection with the CD wire pipe 140, the plurality of CD connection pipes 120 are embedded in the floor 400 in a shape in which they are spread radially from each other.

[0050] Figure 6 An embodiment of the outlet box 200 fixed to the multi-piece integrated CD connector 100 is shown.

[0051] The outlet box 200 is configured such that each wire introduced through the CD wire pipe 140 is connected to a wiring for activating each electrical product in the building, as shown in Figure 6 The outlet box 200 is configured by an upper plate 211 provided with an introduction opening 221 and a side plate 212 bent downward from the end of each upper plate 211, and includes a main body 210 configured in the shape of a box having an open portion 241 formed in the lower portion, a plurality of introduction outlets provided in the side plate 212, and an introduction pipe 230 protruding outward.

[0052] After the plurality of wires introduced from the CD connection pipes 120 of the multi-piece integrated CD connector 100 are introduced into the outlet box 200 through the introduction opening 221, each branch is connected to the wire in the room through the introduction outlet and the introduction pipe 230.

[0053] Fixing of the outlet box 200 to the multi-piece integrated CD connector 100 can be achieved by various methods.

[0054] As an embodiment related thereto, as shown in FIG. 6, fixing between the connector body 110 and the outlet box 200 is achieved by a bolt 252 or a fastening bolt. For this, a fastening hole P can also be provided at the lower end surface of the connector body 110 and the upper plate 211 of the outlet box 200. Figure 13

[0055] In still another embodiment of fixing the outlet box 200, the multi-piece integrated CD connector 100 further includes a box fixing socket 130 which is fastened to the lower end of the connector body 110.

[0056] The box fixing socket 130 is formed in a circular pipe shape, fixes the outlet box 200 by engagement, and is fastened to the lower end of the connector body 110, and is preferably made of a hard polyvinyl chloride material as a quasi-incombustible material, like the connector body 110.

[0057] Figure 7 An embodiment of the box fixing socket 130 is shown.

[0058] Figure 7 The illustrated box fixing socket 130 is composed of a fastening insertion portion 131 and a latching portion 132.

[0059] The fastening insertion portion 131 is fastened to the connector body 110, and refers to a portion which is inserted between the heat insulating plate 300 and the outer surface of the connector body 110.

[0060] The latching portion 132 is a portion which latches the upper plate of the outlet box 200 and fixes the outlet box 200 to the lower surface of the connector body 110, and has a cross section greater than the introduction opening 221 provided at the upper plate 211 of the outlet box 200.

[0061] Thus, when the fastening insertion portion 131 of the box fixing socket 130 is fastened to the connector body 110 after passing through the introduction opening 221 from the open portion 241 side of the outlet box 200, the latching portion 132 is latched to the bottom surface of the upper plate 211 of the outlet box 200 and moves together to the upper portion, thereby being fixed to the lower surface of the connector body 110.

[0062] In this case, the latching portion 132 is exposed from the open portion 241 of the outlet box 200, and can also be used as a gripping unit required for fastening the box fixing socket 130.

[0063] ​For example, if the cross-sectional shape of the locking portion 132 is a polygon, the worker can easily perform the fastening work manually without using an additional tool.

[0064] Preferably, the fastening of the connector body 110 and the box fixing socket 130 is achieved by a threaded fastening method. To this end, an external threaded portion 112 is provided on the outer surface of the lower end portion of the connector body 110, and an internal threaded portion 131b can be provided on the inner surface of the upper end portion of the fastening insertion portion 131 of the box fixing socket 130.

[0065] Thus, the box fixing socket 130 is fastened to the outside of the connector body 110 by a threaded fastening method and is moved to the upper portion, so that the fastening insertion portion 131 is completely sealed from the fine gap that can occur between the heat insulating plate 300 and the connector body 110, thereby further perfectly achieving the continuity of the heat insulating structure.

[0066] In still another embodiment of the fastening insertion portion 131, an insertion blade 131a is provided on the front end thereof. The insertion blade 131a prevents the heat insulating plate from being damaged by the front end portion, and can allow the box fixing socket 130 to be smoothly moved toward the upper portion from between the outer surface of the heat insulating plate 300 and the connector body 110.

[0067] In this case, the insertion blade 131a is formed to have a tip cross-section in which the outer surface is inclined upward toward the inner surface, so that the sharp outer surface is in close contact with the outer surface of the connector body 110, thereby achieving the fastening in this state.

[0068] The shape and structure of the multi-piece integrated CD connector 100 according to the present application are described above, and the following describes a method for installing the outlet box 200 for drawing an electric wire from the heat insulating plate 300 attached to the bottom surface of the floor 400.

[0069] Figure 8 to Figure 13 To illustrate the steps of the process of installing the outlet box 200 according to the present application, the method can be achieved by sequentially performing the following steps: step a) forming a setting hole H of the heat insulating plate 300; step b) installing the multi-piece integrated CD connector 100; step c) installing a reinforcing bar and a CD wire pipe 140; step d) exposing the lower end surface of the connector body 110; and step e) installing the outlet box 200.

[0070] The following describes each step in detail.

[0071] Step a) forming a setting hole H of the heat insulating plate 300 Figure 8 )

[0072] The heat insulating plate 300 is laid on the upper surface of the bottom mold 500 for constructing the floor 400, and the heat insulating plate 300 is perforated at a position where the outlet box 200 is to be provided and a provision hole H is formed in a penetrating manner. The inner diameter of the provision hole H is the same as the outer diameter of the connector body 110 of the multi-piece integrated CD connector 100 to be inserted therein.

[0073] Step b) providing the multi-piece integrated CD connector 100 Figure 9 )

[0074] The multi-piece integrated CD connector 100 is inserted into the provision hole H so that the lower end surface of the connector body 110 is in contact with the upper surface of the bottom mold 500.

[0075] In this case, preferably, the length of the connector body 110 is the same as the thickness of the heat insulating plate 300, and the multi-piece integrated CD connector 100 prevents the reduction of the concrete C covering thickness due to the intrusion of the floor 400 or the reduction of the heat insulating thickness due to the intrusion of the concrete C into the inside of the provision hole H.

[0076] If the provision of the multi-piece integrated CD connector 100 of the heat insulating plate 300 is completed, the protruding portion 120B of the CD connection pipe 120 is exposed at the upper portion of the heat insulating plate 300, and as described above, is embedded in the poured floor concrete C, thereby performing the anchoring function of the connector body 110.

[0077] Further, preferably, the upper end of the protruding portion 120B of the CD connection pipe 120 is connected to the CD wire pipe 140 positioned between the upper reinforcement 420 and the lower reinforcement 410 of the floor 400, which is positioned at the lower side of the lower reinforcement 410 of the floor 400 to be provided later, and not only prevents the interference that hinders the reinforcement provision work, but also slowly realizes the degree of bending of the CD wire pipe 140 for connection thereto.

[0078] Step c) providing the reinforcement and the CD wire pipe 140 Figure 10 )

[0079] If the provision of the multi-piece integrated CD connector 100 is completed, the reinforcement provision work of the upper reinforcement 420 and the lower reinforcement 410 of the floor and the provision work of the CD wire pipe 140 embedded in the floor 400 are performed on the upper surface of the heat insulating plate 300.

[0080] Preferably, the CD wire pipe 140 is positioned between the upper reinforcement 420 and the lower reinforcement 410, thereby preventing the reduction of the concrete C covering thickness at the lower portion of the CD wire pipe 140.

[0081] Once the reinforcement and CD conduit 140 installation are completed, the end of CD conduit 140 is connected to the protrusion 120B of CD connecting pipe 120. Thus, by locking it with the fixed end cap 121, separation will be prevented when pouring concrete C for the floor slab.

[0082] Step d) Expose the lower end face of connector body 110 ( Figure 11 )

[0083] If the reinforcement and CD conduit 140 installation are completed on the upper part of the insulation board 300, the bottom mold 500 can be removed after pouring and curing concrete C to expose the lower end face of the connector body 110 of the multi-piece integrated CD connector 100.

[0084] Step e) Set the outlet box 200 ( Figure 12 , Figure 13 )

[0085] The cable outlet box 200 is fixed to the lower end face of the connector body 110 of the multi-piece integrated CD connector 100 exposed from the bottom surface of the heat insulation plate 300.

[0086] As described above, the fixing method of the outlet box 200 can be achieved in the following way.

[0087] Figure 12 The method of fixing the outlet box 200 using the box fixing socket 130 is shown.

[0088] The fastening insertion part 131 of the box fixing socket 130 passes through the inlet opening 221 from the opening 241 side located at the lower part of the outlet box 200. With the bottom surface of the upper plate 211 of the outlet box 200 locked by the locking part 132 of the box fixing socket 130, if the box fixing socket 130 is combined with the connector body 110 by threaded fastening, the outlet box 200 and the box fixing socket 130 move together to the upper part, thereby being firmly fixed to the multi-piece integrated CD connector 100.

[0089] Figure 13 The method of fixing the connector body 110 to the outlet box 200 is shown to be achieved by bolts 252 or fastening bolts.

[0090] The bolt 252 is tightened on the solid portion outside the insertion port 111 of the connector body 110, such as... Figure 13 As shown in part (a), a fastening surface 211a with a fastening hole p is provided on the upper plate 211 of the outlet box 200.

[0091] In a state where the airtight gasket 251 is attached to the upper surface of the upper plate 211 of the outlet box 200 in advance, the outlet box 200 can be fixed to the multi-piece integrated CD connector 100 by the fixing method, thereby additionally preventing a decrease in the heat insulation performance at the portion where the installation hole H is formed.

[0092] While the present application has been described with reference to the specific embodiments thereof, it should be understood by those skilled in the art that the forgoing description is not intended to limit the application to the specific embodiments, and that many modifications and variations are possible therein without departing from the spirit of the application as set forth in the appended claims. Accordingly, the technical scope of the present application is to be construed in accordance with the appended claims rather than the foregoing description, and all modifications and variations equivalent thereto are to be included in the technical scope of the present application.

Claims

1. A multi-piece integrated CD connector fixedly installed in a thermal insulation board attached to the bottom surface of a floor so that a plurality of CD wire pipes embedded in the floor are connected to an outlet box, characterized by comprising: a connector body embedded in the thermal insulation board; and a plurality of CD connection pipes inserted into the inside of the connector body, the CD connection pipes comprising: an internal portion located inside the connector body; and a protruding portion protruding from the upper surface of the connector body and embedded in the floor, the connector body being configured in the shape of a solid circular rod except for an insertion port formed in the inside so that the plurality of CD connection pipes can be inserted in an integrated manner. Further comprising a box fixing socket in the shape of a circular pipe body fastened to the lower end portion of the connector body for fixing the outlet box.

4. The multi-piece integrated CD connector according to claim 3, characterized in that the box fixing socket is composed of a fastening insertion portion and a latching portion, the fastening insertion portion is combined with the connector body in a threaded fastening manner by being inserted through an introduction opening provided in the upper plate of the outlet box, and the cross section of the latching portion is larger than the introduction opening, and the latching portion is latched to the bottom surface of the upper plate of the outlet box when the fastening insertion portion is combined with the connector body in a threaded fastening manner.

5. The multi-piece integrated CD connector according to claim 4, characterized in that an external thread portion is provided on the outer surface of the lower end portion of the connector body, an internal thread portion is provided on the upper end portion of the inner surface of the fastening insertion portion, and the box fixing socket is combined with the outside of the connector body in a threaded fastening manner.

6. The multi-piece integrated CD connector according to claim 4, characterized in that an insertion blade is provided on the front end of the fastening insertion portion, and a pointed cross section in which the outer surface is inclined upward toward the inner surface is formed in the insertion blade. Further comprising: step a) of laying a thermal insulation board on the upper surface of a bottom mold and perforating the thermal insulation board to form a setting hole; step b) of inserting a multi-piece integrated CD connector according to any one of claims 1 to 6 into the setting hole; step c) of providing upper and lower reinforcement bars for a floor on the upper surface of the thermal insulation board and connecting the CD connection pipe protruding portion of the multi-piece integrated CD connector to set a CD wire pipe for floor embedding; step d) of exposing the lower end surface of the connector body of the multi-piece integrated CD connector after pouring and solidifying concrete for the floor; and step e) of fixing an outlet box to the lower end surface of the connector of the multi-piece integrated CD connector exposed on the bottom surface of the thermal insulation board. The length of the connector body of the multi-piece integrated CD connector set through step b) is the same as the thickness of the thermal insulation board.

2. The multi-piece, one-piece CD connector of claim 1, wherein, In the process of setting the multi-piece integrated CD connector through step b), the upper end of the CD connection pipe protruding portion is located below the lower reinforcement bar set through step c).

3. The multi-piece, one-piece CD connector of claim 2, wherein, In the process of fixing the outlet box through step e), the box fixing socket is fixed to the outer surface of the connector body in a threaded fastening manner. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 7. A method for setting up a junction box, for leading electrical wires out from a heat insulation board attached to the bottom surface of a floor slab, characterized in that, ​ ​ ​ ​ ​ ​ ​ 8. The method of claim 7, wherein, ​ 9. The method of claim 7, wherein, ​ 10. The method of claim 7, wherein, ​ 11. The method of claim 7, wherein, During the fixing of the outlet box by said step e), the fixing between the connector body and the outlet box is achieved by means of a screw or a fastening screw.

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