JP2001073493A - Floor panel, building unit, and electrical wiring method for unit building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrical wiring method for a floor panel permitting the correct distribution of electric wires in few man-hour. SOLUTION: Joists 11, end joists 12, irrotational stopper 15 are previously provided with through holes (joist wire passing parts) 11a, 12a, 15a. A floor frame 1A is built up with the joists 11, 11, and end joists 12, 12, and then the stoppers 15, 15, and tie sole plates 13, 13 are fitted. Electric wires 41, 41 for plug sockets, and an electric wire 42 for a ceiling luminaire are distributed, and a floor face member 14 is fitted to the floor frame 1A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor panel, a building unit and an electric wiring method for a unit building.

[0002]

2. Description of the Related Art Conventionally, in a multi-story building including a floor panel and a wall panel in which a floor material and a wall material are attached to a wooden floor framing and a wall framing, a ceiling of a lower floor is used. There is a construction method in which the floor on the upper floor is formed by floor panels on the upper floor. In this method, before attaching ceiling surface materials on the lower floor of a multi-story building, a through hole (a joist through line portion) for a joist constituting a floor frame of a floor panel on an upper floor is provided. Was provided with a drill or the like, and the electric wires were wired using the through holes.

In addition, a multi-story building in which a building unit in which a floor panel and a wall panel in which a floor material and a wall panel are attached to a wooden floor framing and a wall framing is box-shaped is arranged adjacent to each other. Japanese Patent Application Laid-open No.
-200921 discloses the following content.
The ceiling panel of the building unit for lower floors is attached to the lower surface of the floor panel of the building unit for upper floors, and a line pipe is previously arranged on the ceiling panel. This ceiling panel is configured by attaching a ceiling panel to a lower surface of a ceiling support frame. The end of the wire pre-wired in the wall panel is taken out from the wall wire provided at the upper end of the wall panel, the end of the wire is inserted into the wire pipe, guided to the joint box, and the ceiling wiring wire. And so on with a joint box. In this way, even on the ceiling panel to which the ceiling panel is attached, the electric wires can be routed to the joint box provided at a position far away from the wall passage.

[0004]

However, in the construction method in which the ceiling of the lower floor and the floor of the upper floor are formed by the floor panels of the upper floor, a through hole is provided in the joist, so that it is difficult to construct the floor at the construction site. An upward operation using a drill or the like at a high position is required, and many man-hours are required. In addition, since the wiring of the electric wires is performed in the upward operation, the wiring is viewed from a different direction from the wiring diagram written on the plan view of the building, so that there is a problem that the wiring is easily mistaken. In addition, since electric wires are pulled down from the floor panel on the upper floor to the wall panel on the lower floor, and the wall material of the wall panel on the lower floor is attached, electric work and carpentry work are mixed, making process management difficult. Was. In addition, the electrical wiring to the outlet provided near the floor required long wires because the wires were pulled down from the floor panel on the upper floor forming the ceiling.

In the case of the building unit disclosed in Japanese Patent Application Laid-Open No. 9-200921, there are the following problems. Since the ceiling panel attached to the floor panel of the building unit for the upper floor has a ceiling panel attached to the lower surface of the ceiling support frame, it has been difficult to guide the electric wires to the joint box. Therefore, this problem is solved by disposing a line pipe on the ceiling panel. However, in order to take out the end of the wire previously wired in the wall panel from the wall line at the upper end of the wall panel and wire it on the ceiling panel,
The ceiling panel is located below the wall line. Therefore, before placing the building unit for the upper floor on the building unit for the lower floor, the ends of the electric wires extending from the traffic lines should be put out of the building unit and be placed in the building for the upper floor. When the ceiling panel attached to the unit falls below the upper end of the wall panel of the lower-floor building unit, electric wires are drawn into the building unit from the work holes provided at the ends of the ceiling panel, and then the upper-floor building unit Must be placed, and the end of the electric wire must be inserted through the line pipe and guided to the joint box.

[0006] Since the wiring work is performed as described above, there is a problem that an extra step is required for the work of mounting the upper floor building unit on the lower floor building unit. In addition, since the ceiling panel is located below the traffic line at the upper end of the wall panel of the lower-floor building unit, there is a problem that the ceiling height of the room constituted by the lower-floor building unit is reduced. further,
Connection with the ceiling wire or wall panel wire end that was wired from the distribution board, etc. is performed at the construction site by inserting the end of the wire through the line pipe and leading it to the joint box. There was a problem that the construction time on site was long. In addition, the lengths of the ends of the wires hanging down from the upper end of the wall panel vary, and in some cases, very long wires hang down, which may hinder construction work at the unit building construction site.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide an electric wiring method for a floor panel in which electric wires can be surely wired with a small number of man-hours. It is another object of the present invention to provide an electric wiring method for a building unit in which an electric wire can be wired with a small number of man-hours in a building unit manufacturing plant. It is another object of the present invention to provide an electric wiring method for a unit building in which electric wires can be wired with a small number of man-hours at a construction site. Still another object of the present invention is to provide a method of electric wiring of a unit building in which the ceiling of a room composed of lower-floor building units can be raised.

[0008]

In order to achieve the above object, an invention according to claim 1 is an electric power supply system for a floor panel in which a floor panel is attached to a wooden floor frame in which both ends of a plurality of joists are connected by end joists. A wiring method, wherein a joist line portion is provided in advance on the joist,
An electric wiring method for a floor panel, comprising assembling a floor frame with the joists and the end joists, and thereafter wiring the electric wires by using the joist passages.

Here, the joist line is formed by forming a circular through hole in the center of the joist or by forming a notch such as a square at the upper end or lower end of the joist. In addition, a wire section may be provided on the end joist.

According to a second aspect of the present invention, there is provided the electrical wiring method for a floor panel according to the first aspect, wherein a floor panel is attached to a wooden floor frame in which both ends of a plurality of joists are connected by end joists. Providing a joist line portion in advance on the joist, assembling a floor frame with the joist and the end joist, thereafter laying wires using the joist line portion, and then attaching a floor material. An electrical wiring method for a floor panel, characterized in that:

According to a third aspect of the present invention, in the first or second aspect, an electric wire for an outlet provided on a wall panel erected on the floor panel is wired to the floor panel. It is a method of electric wiring of the floor panel to be used.

[0012] The invention described in claim 4 is the first invention.
In 2 or 3, an electric wiring method for floor panels, characterized in that a floor wire portion is provided in advance at the wall panel standing position of the floor panel.

According to a fifth aspect of the present invention, a floor panel is attached to a wooden floor frame in which both ends of a plurality of joists are connected by end joists, and a wooden panel is electrically connected to a wooden panel. A wall material is attached to both sides of the framework, and a wall panel provided with a wall communication portion at an upper end portion is an electric wiring method of a building unit which is erected and assembled into a box shape. After the wall material is attached and the wall panel is erected at a predetermined position on the floor panel, an electric wire from the floor panel is drawn into the wall panel or an electric wire extending to the ceiling portion is connected to the wall panel. And then extending the end of the electric wire from the wall passage portion, and then attaching a wall material on the other surface.

According to a sixth aspect of the present invention, there is provided an electric wiring method for a unit building in which building units electrically connected by the method according to the fifth aspect are arranged adjacent to each other, wherein the building units are wired in the wall panel. The wires extend to the floor panel of the upper-floor building unit, are wired in the wall panel in a joint box provided on the floor panel, and other wires or wires extending in the floor panel of the upper-floor building unit. An electric wiring method for a unit building, wherein a ceiling surface material is attached after connecting to an electric wire extended from another building unit.

Here, the electric wire extended from another building unit refers to an electric wire for ceiling wiring arranged from a distribution board, an electric wire between a lighting fixture provided over the building unit and its switch, and the like. is there.

[0016]

In the electric wiring method for a floor panel according to the first aspect of the present invention, the joist is provided with a joist line in advance, and the floor frame is assembled by the joist and the end joist. Therefore, it is possible to assemble a floor frame having a joist line portion with a small number of man-hours.

In the electric wiring method for a floor panel according to the second aspect of the present invention, the joist is provided with a joist passage portion in advance, and the floor frame is assembled by the joists and the end joists. Therefore, it is possible to assemble a floor frame having a joist line portion with a small number of man-hours. Before assembling the floor frame and attaching the floor material, the electric wires are laid using the joist line. Therefore, the wiring of the electric wires can be performed in an easy posture from above the floor frame. In addition, since the wiring of the electric wire can be performed according to the wiring diagram by looking down from above, mistakes in wiring can be reduced.

According to a third aspect of the present invention, an electric wire for an outlet provided on a wall panel erected on the floor panel is wired on the floor panel. Therefore, the starting distance of the electric wire to the outlet can be shortened. In addition, since a dedicated circuit for the outlet can be provided, power with a stable voltage can be supplied.

In the electric wiring method for a floor panel according to the fourth aspect of the present invention, the floor connecting portion is provided in advance at the wall panel standing position of the floor panel. Therefore, the wall panel can be erected after the electric wire of the floor panel is extended from the floor passage portion on the floor surface material.

In the wiring method for a building unit according to the fifth aspect of the present invention, the wall panel having the wall material attached to one surface is erected at a predetermined position on the floor panel, so that the surface on which the wall material is not attached is provided. The wall panel can be easily erected by driving nails or the like from the upper surface of the lower frame of the wall panel toward the floor panel. Also, before the wall panel is erected in this way and before attaching the other wall material, the electric wire from the floor panel is drawn into the wall panel using the surface where the wall material is not attached. Alternatively, an electric wire extending from the ceiling can be wired to the wall panel, and the end of the electric wire can be extended from the wall passage. Therefore, since the electric wires can be freely routed in the wall panel, the wiring work is easy and the number of steps can be reduced.

In the wiring method for a unit building according to the present invention, an electric wire previously wired in a wall panel is extended to a floor panel of an upper-floor building unit, and the electric wires are connected in a joint box provided on the floor panel. The ceiling panel is attached after being connected in advance to the wall panel and connected to another electric wire extending from the floor panel of the upper-floor building unit or an electric wire extending from another building unit. Therefore, since the electric wires can be routed freely within the floor panel of the upper-floor building unit,
Wiring work is easy and man-hours can be reduced.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on embodiments with reference to the drawings. FIG. 1 is a partially cutaway perspective view of a floor panel according to the present invention. In FIG. 1, a floor panel 1a is formed by attaching a floor panel 14 made of plywood having a thickness of 20 mm to a wooden floor framework 1A. Floor framework 1A
Is fixed to both ends of six joists 11 arranged in parallel with end joists 12 and 12 and connecting lower frames 13 and 13 to the lower surfaces of the end joists 12 and 12. , And anti-roll stoppers 15, 15,... Each of the six joists 11 and the end joists 12, 12 has a diameter of 60 m at the center of each end at both ends.
m through-holes (joist line portions) 11a and 12a are provided. In addition, the stoppers 15 on both sides are provided with through-holes (joist line portions) 15 having a diameter of 60 mm at the central portions thereof.
a is provided. Here, each of the joist 11, the end joist 12, and the anti-rolling stopper 15 is 235 mm, and the thickness is 2 mm.
3 mm.

Referring to FIG. 1, an electric wiring method for the floor panel 1a will be described. First, the joist 11 and the end joist 1
2. Through holes 11a, 12a and 15a are provided in the stopper 15; After that, the floor frame is assembled by the joists 11, 11,.
Attach the connection lower frames 13 and 13 to 5, 15,. After that, the through holes 11a, 11a,.
5a and 15a are used to connect outlet wires 41 and 41.
And wires 42 for ceiling lighting fixtures. In addition, floor framework 1
The joint box 4 is fixed to the side surface of the joist 11 at the position to be the peripheral portion of A, and one ends of the outlet wires 41, 41 and the ceiling lighting wire 42 are drawn into the inside. At this time, the other ends of the outlet wires 41 are extended above the floor frame 1A. After that, the floor surface material 14 provided with the cutouts 14a, 14a,... For the communication lines is connected to the other ends of the electric wires 41, 41 for the outlets. From the floor panel 1a so that it can be extended. The through holes 11a and 12a of the joists on both sides of the floor panel 1a and the end joists are used when wires are laid across the floor panel provided adjacently.

As described above, the floor frame 1A having the through-holes (joist through lines) 11a, 12a, and 15a is provided.
Can be assembled with a small number of man-hours. In addition, electric wire 4
The wiring of 1, 41, and 42 can be performed from the floor framework 1A in an easy posture. In addition, since the wiring of the electric wires 41, 41, and 42 can be performed as shown in the wiring diagram by looking down from above, errors in wiring can be reduced. Since the electric wire 41 for the outlet provided below the wall panel erected on the floor panel 1a is wired to the floor panel 1a, the rising distance of the electric wire 41 to the outlet can be shortened. In addition, since a dedicated circuit for the outlet can be provided, power with a stable voltage can be supplied. Also, the wall panel can be erected after the outlet electric wire 41 of the floor panel 1a is extended from the notch for communication (floor connection part) 14a onto the floor surface material 14, so that the electricity of the floor panel 1a can be reduced. Once the work is completed, carpentry work can be started, with wall panels standing upright. That is, the process can be easily managed.

Referring to FIG. 2, another point of the floor panel of the present invention which is different from FIG. 1 will be mainly described. The floor panel 1b is formed by attaching a floor member (not shown) to a floor framework 1B. Floor framework 1B
Are fixed at both ends of the six joists 11 with end joists 12, 12, connecting lower frames 13, 13 to the lower ends of the end joists 12, 12, and between the joists 11, 11, anti-rollpers 15, 1
.. Are attached. 6 joists 11
And the end joists 12 and 12 have a notch (floor line section) of 60 mm × 60 mm at the upper end at each end.
1b and 12b are provided. Are attached between the joists 11, 11, and the stoppers 15, 15 on both sides are provided with 60
A notch (floor line section) 15b of mm × 60 mm is provided.

As described above, since the notch (the joist passage portion) of the floor frame 1B is on the upper surface of the joist 11, the electric wire can be routed by being placed on the notch 11b from above the floor frame 1B. . Therefore, electric wiring can be easily performed with a small number of man-hours as compared with passing an electric wire through the through hole.

Referring to FIG. 3, a description will be given of a building unit and an electric wiring method of the unit building according to the present invention. In FIG. 3, a first-floor building unit U1 is mounted on a foundation 5, and a second-floor building unit U2 is mounted thereon and fastened to each other. In building units U1 and U2, floor panel 1a
Is configured similarly to FIG. Also, wall panel 2
Is a wooden wall composed of a plurality of vertical frames 21 arranged in parallel with each other, an upper frame 23 connecting the upper ends of the vertical frames 21, and a lower frame 22 connecting the lower ends of the vertical frames 21. Framework 2
A outer wall material (wall material) 24 made of a hard wood chip cement plate is attached to the outer surface of A, and an inner wall material (wall material) 25 made of gypsum board is attached to the inner surface. The upper end of the inner wall material 25 is attached 15 mm lower than the upper end of the upper frame 23. A notch 23a is provided inside the upper frame 23 of the wall frame set 2A, and a notch 22a is provided inside the lower frame 22.
Each is a wall passage.

A wiring method for a building unit according to the present invention assembled in a factory using the first-floor building unit U1 in FIG. 3 will be described. The wall panel 2 on which the outer wall material 24 is attached is erected on the wire cutout 14a of the floor panel 14 of the floor panel 1a to which electric wiring has been made in advance. At this time, the inner wall material 2
5 is not installed. The electric wires 41, 41 are drawn in to the mounting position of the outlet 41 a provided on the wall panel 2 by using the notch 22 a of the lower frame 22 of the wall panel 2. Also,
In this state, the switch electric wire 43 is wired in the wall panel 2, and one end of the electric wire 43 extends from the notch 23 a of the upper frame 23 of the wall panel 2. Next, the inner wall material 25 is attached to the wall frame 2A.
Then, a mounting hole is provided at a mounting position of the outlet 41a, the end of the electric wire 41 is connected to the outlet 41a, and the outlet 41a is mounted to the mounting hole of the inner wall surface member 25. Further, one end of the switch electric wire 43 is hung inside the wall panel 2. The building unit U2 for the second floor can be wired in the same manner.

By performing the electrical wiring of the building unit in this manner, the electric wire 43 extending from the notch 23a of the upper frame 23 of the wall panel 2 keeps the second-floor building unit U2 hanging down inside the building unit U1. Floor building unit U
1, the man-hours at the construction site of the unit building can be reduced.

Further, since most of the electrical wiring of the building unit U1 can be performed in the factory, the number of steps at the construction site of the unit building can be reduced, and the construction period can be shortened.

Further, the floor panel 1a is cut from the upper surface of the lower frame 22 of the wall panel 2 by utilizing the surface on which the inner wall material 25 is not attached.
By driving nails into the wall panel 2
Can be erected. Also, erect the wall panel 2 like that,
Before attaching the inner wall member 25, an electric wire 41 from the floor panel 1a is drawn into the wall panel 2 or extended to the ceiling using a surface where the inner wall member 25 is not attached. 43 can be wired to the wall panel 2 and one end of the electric wire 43 can be extended from the notch (wall passage portion) 23a. Therefore, since the electric wires can be freely routed in the wall panel 2, the wiring work is easy and the number of steps can be reduced.

Next, a method for wiring a unit building according to the present invention will be described with reference to FIG. The building units U1 and U2 assembled as described above are carried to a construction site, and the building unit U1 is placed on the foundation 5 and U2 is placed and fastened thereon to construct a unit building. Thereafter, the switch wires 43 wired in the wall panel 2 of the first-floor building unit U1 are extended to the floor panel 1a of the second-floor building unit U2. Here, the notch 23a of the upper frame 23 of the wall panel 2 of the lower floor building unit U1 is provided in the connecting lower frame 13 of the upper floor building unit U2.
A notch 13a is provided in conformity with the above, and the electric wire 43 is extended to the floor panel 1a of the second-floor building unit U2 using these notches 23a and 13a. After connecting to the ceiling lighting fixture electric wire 42 in the joint box 4 provided on the joist 11 shown in FIG. 1 of the floor panel 1 a, the ceiling panel 32 made of gypsum board is attached via the ceiling edge 41. I do. Next, a mounting hole for a downlight (ceiling lighting device) 42a is provided in the ceiling surface material 32, and the ceiling lighting device electric wire 42a is provided.
And the downlight 42a is attached to the mounting hole.

On the second-floor building unit U2, a third-floor building unit and a roof unit are mounted and fastened, and electric wires can be similarly wired.

As described above, since no extra frame or the like for wiring is required on the ceiling, the ceiling of the room constituted by the first-floor building unit U1 can be raised. That is, a room with a high ceiling can be configured without extra cost.

Further, the joint box 4 is provided with the floor frame 1
Since it is provided in the periphery of A, the distance between the joint box 4 and the notch 23a of the upper frame 23 of the wall panel 2 can be shortened. That is, the electric wire 43 extending from the notch 23a
Can be shortened in length. In addition, since the length of one end of the electric wire 43 hanging down from the upper end of the wall panel 2 is short, the electric wire 43 does not interfere with the interior work or the like, and the workability is good.

At the construction site of the unit building,
When the building units U1 and U2 are arranged adjacent to each other, wiring and connection of electric wires can be performed immediately, so that electric wiring work can be performed regardless of other construction processes such as carpentry work. The ceiling panel 32 is attached after the wiring and connection of the electric wires are completed. That is, the wiring and connection of the electric wires are performed from the first floor building unit U1 to the joists 11, 11, 11,... Of the floor frame 1A.
Therefore, the number of electric wiring steps can be reduced because the gap can be easily used.

Although the embodiment of the present invention has been described with reference to the drawings, the specific configuration of the present invention is not limited to this embodiment, and there are design changes and the like that do not depart from the gist of the present invention. Are also included in the present invention.

For example, the electric wiring of the floor panel may be performed after the floor material is attached. The wall panel is effective even if it is a partition panel. The joint box may be provided at the center of the floor frame, or one or more joint boxes may be provided at the periphery. Further, the ceiling surface material may be directly attached to the lower surface of the floor frame of the upper-floor building unit without using the ceiling edge.

[0039]

According to the floor panel wiring method of the present invention, a floor frame having a joist line can be assembled with a small number of man-hours. That is, wiring of the floor panel can be performed with a small number of steps.

In the wiring method for floor panels according to the second aspect of the present invention, a floor frame having a joist line can be assembled with a small number of steps. Further, the wiring of the electric wires can be performed in an easy posture from above the floor frame, so that mistakes in the wiring can be reduced. That is, wiring of the floor panel can be accurately performed with a small number of man-hours.

In the wiring method for floor panels according to the third aspect of the present invention, the rising distance of the electric wire to the outlet can be shortened. In addition, since a dedicated circuit for the outlet can be provided, power with a stable voltage can be supplied. That is, it is possible to reduce the cost of electric wires and to perform high-quality electric wiring.

In the wiring method for a floor panel according to the fourth aspect of the present invention, the wall panel can be erected after the electric wires of the floor panel are extended from the through portion of the floor panel onto the floor panel. . Therefore, as soon as the electrical wiring of the floor panel is completed, the wall panel, which is a carpentry work, can be erected, thereby facilitating the process management.

In the electric wiring method for a building unit according to the fifth aspect of the present invention, the wall material is attached to one surface of the wall panel, and the wall panel is erected at a predetermined position. The wall panel can be easily erected by driving a nail or the like from the upper surface of the lower frame of the wall panel toward the floor panel using the unfinished surface. Also, before the wall panel is erected in this way and before attaching the other wall material, the electric wire from the floor panel is drawn into the wall panel using the surface where the wall material is not attached. An electric wire extending from the wall panel to the ceiling of the building unit can be wired to the wall panel in advance, and the end of the electric wire can be extended from the wire portion.
Therefore, since the electric wires can be freely routed in the wall panel, the wiring work is easy and the number of steps can be reduced.

In the electric wiring method for a unit building according to the present invention, since the electric wires can be freely routed within the floor panel of the upper floor building unit, the wiring work at the construction site of the unit building is easy. Can reduce man-hours.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of a floor panel of the present invention.

FIG. 2 is a perspective view of another floor panel of the present invention.

FIG. 3 is a longitudinal sectional view for explaining a method of electric wiring of a building unit according to the present invention.

[Explanation of symbols]

 U1 1st floor building unit (lower floor building unit) U2 2nd floor building unit (upper floor building unit) 1a, 1b floor panel 1A, 1B floor frame 11 joist 12 edge joist 14 floor material 14a cut-out for communication line (floor) 11a, 12a Through-hole (joist line) 11b, 12b Notch (joist line) 2 Wall panel 2A Wall frame set 22a, 23a Notch (wall line) 24 Exterior wall material (wall material) 25 Inner wall material (wall material) 31 Ceiling ridge 32 Ceiling surface material 4 Joint box 41 Outlet electric wire (electric wire) 41a Outlet 42 Electric wire for ceiling light fixture (electric wire) 42a Ceiling light fixture (downlight) 43 Electric wire for switch (electric wire) ) 43a switch

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H02G 3/30 H02G 3/26 B 3/38 3/28 D

Claims (6)

[Claims] An electrical wiring method for a floor panel in which a floor panel is attached to a wooden floor frame in which both ends of a plurality of joists are connected by end joists, wherein the joists are provided with a joist line portion in advance. A floor frame is assembled by using the joists and the end joists, and thereafter, electric wires are wired using the joist line portions. 2. An electrical wiring method for a floor panel in which a floor panel is attached to a wooden floor frame in which both ends of a plurality of joists are connected by end joists, wherein the joists are provided with a joist line portion in advance. 2. The floor panel according to claim 1, wherein a floor frame is assembled by using the joists and the end joists, and thereafter, electric wires are wired by using the joist passages, and then a floor material is attached. Electric wiring method. 3. The electric wiring method for a floor panel according to claim 1, wherein an electric wire for an outlet provided on a wall panel erected on the floor panel is wired on the floor panel. 4. The floor panel electrical wiring method according to claim 1, wherein a floor wire portion is provided in advance at the wall panel standing position of the floor panel. 5. A floor material is attached to a wooden floor frame in which both ends of a plurality of joists are connected by end joists, and wall materials are provided on both sides of the wooden wall frame on a floor panel on which electric wiring has been made in advance. Dressed,
A method of electric wiring of a building unit in which a wall panel provided with a wall communication part at an upper end is erected and assembled into a box shape, wherein a wall material is attached to one surface of the wall panel, and the wall panel is attached. After standing at a predetermined position on the floor panel, an electric wire from the floor panel is drawn into the wall panel, or an electric wire extending to the ceiling portion is wired to the wall panel, and the electric wire is passed through the wall through portion. A method of electrical wiring for a building unit, comprising: attaching an end portion of a building, and then attaching a wall material on the other surface. 6. An electric wiring method for a unit building, in which the building units electrically connected by the method according to claim 5 are arranged adjacent to each other, wherein the electric wires routed in the wall panel are connected to a floor of an upper-floor building unit. Extending to the panel, wired in the wall panel in a joint box provided in the floor panel, and extended from other electric wires or other building units extended in the floor panel of the upper floor building unit. A method of electrical wiring for a unit building, comprising: attaching a ceiling surface material after connecting to an electric wire.