JP5863551B2 - Wiring box - Google Patents

Description

  The present invention relates to a wiring box provided with a box cover having sound insulation properties.

  For example, in a lightweight partition wall as a wall of a building, there is a problem that sound leaks through a through hole that is a place where a wiring box is installed, and sound insulation performance is lowered. Therefore, Patent Document 1 discloses a wiring box with improved sound insulation. As shown in FIG. 8, the wiring box 80 includes a box cover 81 formed in a bottomed box shape having an opening 81 a on one side by a sound insulating material, and a box 82 accommodated in the box cover 81. Is formed. The box cover 81 has a housing portion 88 surrounded by a bottom portion 86 and a peripheral wall 87. The box cover 81 has a function of blocking sound from the outside to the inside or from the inside to the outside.

  Further, the peripheral wall 87 of the box cover 81 is formed so as to widen the opening width as it goes from the bottom portion 86 to the opening portion 81a, and the accommodating portion 88 is formed so as to spread as it goes from the bottom portion 86 toward the opening portion 81a. That is, the peripheral wall 87 in the box cover 81 has a slope inclined from the bottom 86 toward the opening 81a. This gradient is formed by a draft for extracting a molding die for the box cover 81 when the box cover 81 is molded. A flange 89 is integrally formed around the peripheral wall 87 of the box cover 81.

  The box 82 is installed behind the lightweight partition wall, and includes a bottom wall 83 and a peripheral wall 84 erected on the periphery of the bottom wall 83. An insertion hole 84a for drawing a cable into the box 82 is formed in the peripheral wall 84, and a cable protecting conduit (tube material) can be connected to the insertion hole 84a. The box 82 is formed in a box shape having a box opening 85 surrounded by a peripheral wall 84.

  In the wiring box 80 configured as described above, the box cover 81 covers the entire outer surface of the box 82, and the front surface of the flange 89 is in close contact with the back surface of the lightweight partition wall. For this reason, the gap between the lightweight partition wall and the box 82 is closed by the box cover 81, and the sound insulation of the installation location of the wiring box 80 is improved in the lightweight partition wall.

JP 2009-11061 A

  However, since the peripheral wall 87 of the box cover 81 has a slope, a gap 90 is formed between the outer surface of the peripheral wall 84 of the box 82 and the inner surface of the peripheral wall 87 of the box cover 81. For this reason, the peripheral wall 87 of the box cover 81 may be deformed toward the box 82 due to the presence of the gap 90. When the peripheral wall 87 of the box cover 81 is deformed, in addition to the front end of the peripheral wall 87, the flange 89 protrudes forward, making it difficult to bring the front surface of the flange 89 into close contact with the back surface of the lightweight partition wall, and sound insulation is reduced. There is a risk that.

  The present invention has been made in view of the above-described conventional problems, and an object thereof is to prevent a decrease in sound insulation caused by a deformation of a gap between the outer surface of the box peripheral wall and the inner surface of the cover peripheral wall. It is to provide a wiring box that can be used.

In order to solve the above-mentioned problems, the invention according to claim 1 is characterized in that a box cover made of a sound insulating material having an opening on one side and formed in a bottomed box shape and having a peripheral wall for a cover, The box cover has a box opening on one side and is formed in a box shape and has a box peripheral wall having a connection port to which a pipe is connected, and the box cover opens the box opening. Covering the entire outer surface of the peripheral wall for the box while being integrated with the box, a gap is formed between the outer surface of the peripheral wall for the box and the inner surface of the peripheral wall for the cover, and on the outside of the connection port A deformation prevention part is provided, and the deformation prevention part interposes the gap between the outer surface of the box peripheral wall located outside the connection port and the inner surface of the cover peripheral wall facing the outer surface. Without and is summarized in that to prevent the deformation of the box cover by the connection to the connection port of the tubing.

(Delete)

The invention according to claim 2 is the wiring box according to claim 1 , wherein the deformation preventing portion is a spacer disposed between an outer surface of the box peripheral wall and an inner surface of the cover peripheral wall. Is the gist.

  ADVANTAGE OF THE INVENTION According to this invention, the fall of the sound insulation property caused by the deformation | transformation of the clearance gap between the outer surface of the surrounding wall for boxes and the inner surface of the surrounding wall for covers can be prevented.

(A) is a perspective view which shows the wiring box of embodiment, (b) is a perspective view which shows a box. The front view which shows the wiring box of embodiment. The top view which shows a wiring box. Sectional drawing which shows the state which fixed the wiring box to the lightweight shape steel material. Sectional drawing which shows the state which attached the conduit connector to the wiring box and connected the conduit. Sectional drawing which shows another example of a wiring box. Sectional drawing which shows another example of a wiring box. The figure which shows background art.

Hereinafter, an embodiment of a wiring box embodying the present invention will be described with reference to FIGS.
As shown in FIG. 1A, the wiring box 10 is formed by integrating a box 11 made of a synthetic resin material having a square box shape and a box cover 21 having sound insulation.

First, the configuration of the box 11 will be described.
As shown in FIG. 1B, the box 11 is formed in a bottomed square box shape having a box opening S on one surface. Specifically, the box 11 is formed of a rectangular bottom wall 12 and a box peripheral wall 13 erected from the periphery of the bottom wall 12, and the box opening S is surrounded by the box peripheral wall 13. Is formed. The box peripheral wall 13 includes an upper side wall 13a and a lower side wall 13b made of a pair of opposed short side walls, and a right side wall 13c and a left side wall 13d made of a pair of opposed long side walls. And the end surface by the side of the box opening part S in the box surrounding wall 13 is located on the same plane, and the opening surface H1 of the box 11 is formed by the plane in which this end surface is located (two-dot chain line of FIG.1 (b)) reference).

  Two connection ports 15 through which the cable 40 (see FIG. 5) can be inserted are formed in the upper side wall 13a and the lower side wall 13b. One connection port 15 is closed by a knock portion 14, and the other connection port 15 is opened without the knock portion 14 being formed. A boss portion 19 used to attach the wiring device 42 (see FIG. 6) to the box 11 is formed on the inner surfaces of the upper side wall 13a and the lower side wall 13b.

Next, the configuration of the box cover 21 will be described.
As shown in FIGS. 1A and 2, the box cover 21 is formed in a bottomed square box shape having an opening 20 a on one surface. The box cover 21 is formed of a material having a high specific gravity filled in olefin and having bubbles, such as a special olefin foam material. That is, the box cover 21 is made of a sound insulating material, and the bubbles are fine bubbles so as not to lower the specific gravity of the sound insulating material.

  As shown in FIGS. 2 and 4, the box cover 21 is formed by integrally forming a bottom portion 22 formed in a rectangular shape and a cover peripheral wall 23 erected from the periphery of the bottom portion 22. And a housing portion 24 surrounded by a cover peripheral wall 23. In the box cover 21, the plane on which the end face on the opening 20 a side of the cover peripheral wall 23 is located is the opening surface H 2 of the box cover 21, and the opening 20 a of the box cover 21 is surrounded by the cover peripheral wall 23. At the same time, it opens to the opening surface H2. The box cover 21 is not formed with a through hole, a slit or the like penetrating the bottom portion 22 and the cover peripheral wall 23 except for a connecting portion of the conduit connector 50 described later. It has a function to block sound from the inside to the outside.

  The cover peripheral wall 23 is formed to widen the opening width in the long side direction and the short side direction from the bottom 22 toward the opening 20a, and the accommodating portion 24 is formed to widen from the bottom 22 toward the opening 20a. Has been. That is, the cover peripheral wall 23 has a slope inclined from the bottom 22 toward the opening 20a. This gradient is formed by a draft for extracting a molding die for the box cover 21 when the box cover 21 is molded.

  As shown in FIG. 1, a flange 26 is integrally formed around the opening 20 a of the box cover 21. The base end of the flange 26 is integrally formed with the open end of the box cover 21. The flange 26 is formed so as to extend from the entire circumference of the opening 20 a toward the outside of the box cover 21, and the front surface of the flange 26 is located on the opening surface H <b> 2 of the box cover 21. The flange 26 is formed so as to be able to tilt toward the side approaching the bottom portion 22 or the side away from the bottom portion 22 with the base end as the center.

  As shown in FIG. 2 and FIG. 3, it is one wall portion of the cover peripheral wall 23, and a fixing portion 31 is attached to one of the pair of long side wall portions by a mounting screw 32. . When the fixing portion 31 is attached to the box cover 21 with the attachment screw 32, a hole (not shown) through which the attachment screw 32 passes is formed in the box cover 21, and one opening of the hole is an attachment screw. The other opening is closed by the fixing portion 31. For this reason, even if the fixing | fixed part 31 is provided in the box cover 21, the function which interrupts | blocks the sound from the outer side to the inner side of the box cover 21 or an inner side to an outer side does not fall.

  The fixing portion 31 is formed in an elongated plate shape from a synthetic resin material, and an attachment surface with respect to the box cover 21 and a surface facing away from the attachment surface 31b abut on a lightweight steel P (see FIG. 6) as a construction material. Is forming. The abutting surface 31b has a planar shape as a whole, and a part of the abutting surface 31b is cut out to be concave. In a state where the fixing portion 31 is attached to the cover peripheral wall 23, both end portions in the length direction of the fixing portion 31 protrude from the outer surfaces of the pair of short side walls forming the cover peripheral wall 23, and A fixed hole 31 a is formed through the fixed portion 31 in the protruding portion. Moreover, the protrusion part of the fixing | fixed part 31 is formed so that thickness may become thin from the attachment surface side to the box cover 21 to the contact surface 31b side to the lightweight steel P as it goes to each front-end | tip.

  As shown in FIGS. 1A, 2, and 4, the box 11 is housed in the housing portion 24 from the opening 20 a of the box cover 21, and the outer surface of the bottom wall 12 is in the box cover 21. The bottom 22 is bonded to the inner surface with an adhesive. Therefore, the box 11 and the box cover 21 are integrated, and the wiring box 10 is formed.

  As shown in FIGS. 1A and 2, in the wiring box 10, the box cover 21 covers the entire outer surface of the box 11 accommodated in the accommodating portion 24. Further, the box 11 is accommodated from the bottom wall 12 side in the accommodating portion 24 of the box cover 21 so as to open the box opening S.

  Further, in the wiring box 10, the outer surfaces of the upper side wall 13a, the lower side wall 13b, the left side wall 13d, and the right side wall 13c of the box 11, that is, the outer surface of the box peripheral wall 13 and the inner surface of the cover peripheral wall 23 facing the outer surface. A gap K is formed between the two. The gap K is formed between the inner surface of the cover peripheral wall 23 and the outer surface of the box peripheral wall 13 because a gradient is formed on the inner surface of the cover peripheral wall 23. Further, since the cover peripheral wall 23 has a gradient so as to expand from the bottom 22 side toward the opening 20a, the gap K gradually becomes wider from the bottom 22 toward the opening 20a. In the wiring box 10, the opening side of the box 11 does not protrude from the opening 20a of the box cover 21, and the opening surface H1 of the box 11 and the opening surface H2 of the box cover 21 are located on the same plane. ing.

  As shown in FIG. 1A and FIG. 5, a conduit 60 as a tube can be attached to the wiring box 10 using a conduit connector 50. The conduit connector 50 includes a connector main body 51 formed in a cylindrical shape from a synthetic resin, and a synthetic resin nut 55 screwed onto the connector main body 51.

  The connection tool body 51 has a cylindrical connection tube portion 52 formed on one end side in the axial direction, and a male screw portion 53 having an outer diameter smaller than that of the connection tube portion 52 formed on the other end side in the axial direction. Yes. In the connector main body 51, a step surface 51 a is formed at the boundary between the connection tube portion 52 and the male screw portion 53 based on the difference in outer diameter. In addition, a plurality of locking claws 54 are formed on the inner peripheral surface of the connection cylinder portion 52, and each locking claw 54 is formed to be elastically deformable. The outer diameter of the male screw portion 53 is smaller than the diameter of the connection port 15, and the male screw portion 53 can be inserted into the connection port 15.

  The conduit tube 60 is formed into a flexible pipe shape from a synthetic resin material, and has a protruding strip portion 60a that protrudes in the circumferential direction and has a ring shape with the same diameter, and a concave strip portion 60b that forms a ring shape with the same diameter. Are repeatedly formed in a concavo-convex shape. When the conduit 60 is inserted into the connecting tube portion 52 of the conduit connector 50, the locking claw 54 of the connecting tube portion 52 is locked to the concave portion 60b, and the conduit tube 50 is connected to the electric wire. A tube 60 is connected.

  As shown in FIGS. 1A, 1 </ b> B, and 3, in the wiring box 10, a spacer 30 as a deformation preventing portion is provided on the outer surface of the upper side wall 13 a of the box peripheral wall 13. . The spacer 30 is formed in a C shape from a rubber material, and has a notch 30a in a part in the circumferential direction. The spacer 30 is formed so that its inner peripheral edge can be surrounded along the periphery of the connection port 15. The thickness of the spacer 30 is the same as the width of the gap K between the outer surface of the upper side wall 13a (box peripheral wall 13) and the inner surface of the cover peripheral wall 23 facing the outer surface.

  Assuming that the radial direction of the virtual circle connecting the inner peripheral edges of the spacer 30 is the radial direction of the spacer 30, the thickness of the spacer 30 is formed so as to gradually increase as the distance from the notch 30a increases in the radial direction. ing. Therefore, the notch 30a side of the spacer 30 is the thinnest. In the spacer 30, a mounting surface 30 b that is mounted on the upper surface of the upper side wall 13 a is formed in a flat surface shape. On the other hand, in the thickness direction of the spacer 30, the surface opposite to the placement surface 30b forms a support surface 30c. The support surface 30c is formed to be inclined so as to increase the thickness of the spacer 30 as the distance from the notch 30a increases along the radial direction.

  As shown in FIG. 1B, the spacer 30 has a mounting surface 30b on the upper wall so that the notch 30a is located on the innermost side (bottom wall 12 side) of the box 11 and surrounds the connection port 15. It is placed on 13a.

  As shown in FIG. 5, in this mounting state, the inner surface of the cover peripheral wall 23 comes into contact with the support surface 30c. For this reason, the gap 30 is not interposed between the outer side of the connection port 15 on the outer surface side of the upper side wall 13 a and the inner surface of the peripheral wall 23 for the cover. In the present embodiment, “the gap K is not interposed by the spacer 30” means that the spacer 30 is interposed when the wiring box 10 is viewed from the front (front view) as shown in FIG. This means that there is no gap K between the outer surface of the upper side wall 13 a and the inner surface of the cover peripheral wall 23 around the connection port 15. Therefore, the description of “the gap K is not interposed by the spacer 30” indicates that the box cover 21 is more than the spacer 30 when the wiring box 10 is viewed in the vertical direction as shown in FIG. 5. There is no problem if there is a gap K on the bottom 22 side.

Next, the lightweight partition wall W as a wall of the building where the wiring box 10 is installed will be described.
As shown in FIG. 5, the lightweight partition wall W is erected by being fixed so as to sandwich a plurality of lightweight shaped steel materials P (only one lightweight shaped steel material P is shown in FIG. 5) and the lightweight shaped steel materials P. It is constructed from the wall material Wa. Gypsum board is used for the wall material Wa. The light-weight shaped steel P is a C-shaped steel made of a thin steel plate and having a substantially C-shape in a cross-sectional view in a direction orthogonal to the standing direction of the light-weight shaped steel P. In order to construct the lightweight partition wall W, first, a plurality of lightweight steel members P are erected. Next, when the wall material Wa to be paired is disposed so as to sandwich the light-weight shaped steel material P, and the wall material Wa is fixed to the light-weight shaped steel material P with screws, the light-weight partition wall W is constructed. In this lightweight partition wall W, a hollow portion T is formed between the pair of wall materials Wa.

  Next, the operation of the wiring box 10 will be described together with the installation of the wiring device 42. In addition, the light-weight shaped steel material P shall be erected in advance. In order to install the wiring box 10 on the lightweight partition wall W, first, as shown in FIG. 4, the flange 26 in the box cover 21 is tilted toward the side away from the bottom 22 with the base end as the center, The flange 26 is inclined so that the front end of 26 extends away from the bottom 22. Next, the wiring box 10 is fixed to the lightweight steel material P. That is, the fixing screws 33 are inserted into both the fixing holes 31 a of the fixing portion 31, and the fixing screws 33 are forcibly screwed into the lightweight steel material P. Then, the wiring box 10 is fixed to the lightweight steel material P via the fixing portion 31. In addition, when fixing the fixing | fixed part 31 to the lightweight shaped steel material P, the fixing | fixed part 31 is fixed to the position slightly retreated from the outer surface of the lightweight shaped steel P located in the side by which the wall material Wa used as the wall surface side is installed. . This is because the opening surface H2 of the box cover 21 is positioned on the same plane as the surface on the side where the wall material Wa is erected in the lightweight steel P.

  As shown in FIG. 5, in the cover peripheral wall 23 of the box cover 21, a through hole 23a is formed at a position facing the connection port 15 of the box 11, and the male threaded portion 53 of the conduit fitting 50 is formed in the through hole 23a. While being inserted, the peripheral wall 23 for a cover is penetrated.

  The spacer 30 is inserted between the outer surface of the upper side wall 13 a and the inner surface of the cover peripheral wall 23, and the spacer 30 is mounted around the male screw portion 53. At this time, the spacer 30 is mounted so that the notch 30 a is positioned on the bottom 22 side of the box cover 21. Then, with the male screw portion 53 inserted into the connection port 15, a nut 55 is screwed into the male screw portion 53 that penetrates the connection port 15. Then, as the nut 55 is screwed relative to the male threaded portion 53, the stepped surface 51a of the connector main body 51 contacts the outer surface of the cover peripheral wall 23, and the nut 55 contacts the inner surface of the upper side wall 13a. As a result, the cover peripheral wall 23 and the box peripheral wall 13 are held between the stepped surface 51 a of the connector main body 51 and the nut 55, and the conduit connector 50 is attached to the wiring box 10.

  At this time, the spacer 30 is interposed between the inner surface of the cover peripheral wall 23 and the outer surface of the upper side wall 13a. For this reason, even if the cover peripheral wall 23 and the upper side wall 13a are sandwiched by the conduit fitting 50, the inner surface of the cover peripheral wall 23 abuts on the support surface 30c of the spacer 30, and the cover peripheral wall 23 is It is prevented from being deformed toward.

  Next, when the conduit 60 is inserted through the connecting tube portion 52 of the conduit connector 50, the locking claw 54 of the connecting tube portion 52 is locked to the recess 60 b, and the conduit 60 is connected to the conduit connector 50. Is connected. The cable 40 is inserted into the conduit 60 and pulled into the box 11.

  Next, the wall material Wa is erected so as to sandwich the lightweight steel material P. Then, the back surface of the wall material Wa comes into contact with the flange 26, and the wall material Wa is fixed to the light-weight shaped steel material P, whereby the flange 26 is pushed to the light-weight shaped steel material P side by the back surface of the wall material Wa. Tilt toward the side closer to the bottom 22 as the center. Then, since the flange 26 tries to return to the original shape, the flange 26 comes into close contact with the back surface of the wall material Wa. The entire outer surface of the box 11 is covered with the box cover 21, and the box cover 21 and the wall material Wa are closed with a flange 26. For this reason, the box 11 is blocked from the hollow portion T by the wall material Wa and the box cover 21.

  Next, the wiring box 10 installed on the back side of the wall material Wa is detected, the wall material Wa is cut out using a cutting tool (not shown), a through hole Wb is formed in the wall material Wa, and the box 11 On the front side of the wall. At this time, since the opening edge of the through hole Wb is along the inner surface of the box 11, the flange 26 of the box cover 21 covering the entire outer surface of the box 11 is in a state of being in close contact with the periphery of the through hole Wb in the wall material Wa. Maintained. Thereafter, the wiring device 42 is held by the holding frame 43, and the holding frame 43 is attached to the box 11 using the boss portion 19. When the wiring device 42 is accommodated in the box 11, the wiring device 42 is attached to the lightweight partition wall W. Installed.

  In a state in which the wiring device 42 is installed on the lightweight partition wall W, the box cover 21 covers the entire outer surface of the box 11, and the flange 26 is in close contact with the back surface of the wall material Wa around the through hole Wb. For this reason, the gap between the wall material Wa and the box 11 is closed by the box cover 21, and the sound insulation at the installation location of the wiring box 10 is improved in the lightweight partition wall W. Further, a gap K is formed between the outer peripheral surface of the box 11 and the inner peripheral surface of the box cover 21. For this reason, resonance between the box cover 21 and the box 11 is prevented.

According to the above embodiment, the following effects can be obtained.
(1) In the wiring box 10, the spacer 30 is interposed between the outer surface of the upper side wall 13 a (box peripheral wall 13) of the box 11 and the inner surface of the cover peripheral wall 23 of the box cover 21. The gap K is interposed between the outer surface of the box peripheral wall 13 and the inner surface of the cover peripheral wall 23, but the gap K is not interposed by the spacer 30 around the connection port 15. For this reason, in order to attach the conduit fitting 50 to the wiring box 10, even if the box peripheral wall 13 and the cover peripheral wall 23 are sandwiched by the conduit connector 50 around the connection port 15, the cover peripheral wall 23. Is prevented from contacting the support surface 30c of the spacer 30, and the cover peripheral wall 23 is prevented from being deformed. Therefore, even if the conduit connector 50 is attached to the wiring box 10, the cover peripheral wall 23 and the flange 26 are prevented from protruding forward, and the front surface of the flange 26 can be brought into close contact with the back surface of the wall material Wa. It is possible to prevent a decrease in sound insulation.

  (2) A gap K is formed between the outer surface of the box peripheral wall 13 and the inner surface of the cover peripheral wall 23, and the gap K is not interposed by the spacer 30 only around the connection port 15. Therefore, a gap K is left almost around the box 11, and even if the box peripheral wall 13 is vibrated by sound, the cover peripheral wall 23 is prevented from resonating, and the sound insulation can be maintained.

  (3) The bottom wall 12 of the box 11 and the bottom portion 22 of the box cover 21 are bonded with an adhesive to form the wiring box 10. That is, the box peripheral wall 13 and the cover peripheral wall 23 are not bonded. For this reason, when the connection port 15 closed by the knock portion 14 is opened, when the knock portion 14 is removed, the knock portion 14 is not adhered to the peripheral wall 23 for the cover, and the knock portion 14 can be easily removed. Can be removed.

  (4) A gap K is interposed between the inner surface of the cover peripheral wall 23 and the outer surface of the box peripheral wall 13. Therefore, in order to cut the cover peripheral wall 23 with a cutting tool or the like, the cover peripheral wall 23 immediately contacts the box peripheral wall 13 when the cover peripheral wall 23 is pushed toward the box 11 side. For this reason, the cover peripheral wall 23 is supported by the box peripheral wall 13, and the cutting operation is easily performed.

  (5) The box cover 21 is formed of a material having high specific gravity in olefin and having bubbles, such as a special olefin foam material. For this reason, the box cover 21 can insulate the low frequency sound range with a high specific gravity material, and can insulate the high frequency sound range with bubbles.

  (6) The box cover 21 is formed with a flange 26, and the flange 26 extends from the box cover 21. For this reason, when the flange 26 is pressed by the wall material Wa, the flange 26 tilts toward the side close to the bottom 22 of the box cover 21. The flange 26 is pressed against the back surface of the wall material Wa by a restoring force from the tilted state to the original shape. Therefore, the clearance gap between the back surface of wall material Wa and the box 11 can be reliably interrupted | blocked by the flange 26, and the sound-insulation property of the installation location of the wiring box 10 improves.

  (7) In the wiring box 10, the box 11 and the box cover 21 are integrated. For this reason, the box 11 and the box cover 21 are prevented from being separated during transportation and construction of the wiring box 10, and troublesomeness during transportation and construction can be eliminated.

  (8) The gap K is gradually widened from the bottom 22 toward the opening 20a. The support surface 30c of the spacer 30 is inclined in accordance with the shape change of the gap K, and the thickness of the spacer 30 is changed. For this reason, even if the gap K changes in shape, the inner surface of the cover peripheral wall 23 can be brought into contact with the support surface 30 c, and the gap K can be prevented from interposing around the connection port 15.

  (9) The gap K is eliminated around the connection port 15 by using a spacer 30 separate from the box 11 and the box cover 21. Since a plurality of connection ports 15 are formed in the box 11, the spacers 30 can be arranged according to the positions of the connection ports 15 to be used. For this reason, the gap K is eliminated not only around the connection port 15 to be used, but the use of the spacer 30 can minimize the reduction in the volume of the gap K.

  (10) The spacer 30 was formed in a C shape. For this reason, when attaching the conduit connector 50 to the wiring box 10, the spacer 30 can be attached to the male screw portion 53 inserted through the connection port 15. By mounting the spacer 30 on the male threaded portion 53, the spacer 30 can be positioned around the connection port 15. At the same time when the conduit connector 50 is attached to the wiring box 10, the spacer 30 is moved to the upper side wall 13a. It can be interposed between the outer surface and the inner surface of the cover peripheral wall 23.

In addition, you may change the said embodiment as follows.
As shown in FIG. 6, in the cover peripheral wall 23, the wall portion facing the upper side wall 13 a of the box 11 does not form a gradient and is erected so as to be orthogonal to the bottom portion 22. Then, in the wiring box 10, the outer surface of the upper side wall 13 a of the box 11 and the inner surface of the cover peripheral wall 23 are in surface contact, and the gap K between the outer surface of the upper wall 13 a and the inner surface of the cover peripheral wall 23 disappears. Therefore, the wall part itself of the cover peripheral wall 23 functions as a deformation preventing part.

  As shown in FIG. 7, a deformation preventing portion 15 b may be erected around the connection port 15 on the upper side wall 13 a and the lower side wall 13 b of the box 11. With this configuration, in the wiring box 10, the deformation preventing portion 15 b contacts the inner surface of the cover peripheral wall 23 around the connection port 15 of the box 11, and the gap K is eliminated around the connection port 15. The deformation preventing portion may be provided not on the box peripheral wall 13 of the box 11 but on the inner surface of the cover peripheral wall 23 of the box cover 21.

  In the embodiment, the thickness of the spacer 30 is changed in accordance with the gap K. However, when the conduit connector 50 is attached, the inner surface of the cover peripheral wall 23 is brought into contact with the cover peripheral wall 23 to prevent a large deformation of the cover peripheral wall 23. If possible, the thickness of the spacer 30 may be constant.

  O The size of the box cover 21 may be formed in the accommodating portion 24 so that two boxes 11 described in the embodiment can be accommodated. Then, one or two boxes 11 may be bonded to the box cover 21.

○ Integration of the box 11 and the box cover 21 may be performed not by adhesion but by welding, bonding with an adhesive tape, screwing, or the like.
○ The fixing unit 31 may be deleted.

○ All the connection ports 15 may be opened without closing the connection ports 15 with the knock portion 14. Alternatively, all the connection ports 15 may be closed with the knock portion 14.
In the box cover 21, the flange 26 may be deleted.

The fixing part 31 is not limited to the shape of the embodiment as long as it can be fixed to the lightweight steel P, and may be arbitrarily changed.
○ The width of the gap K may be arbitrarily changed.

The gradient formed on the cover peripheral wall 23 may be a gradient other than the draft formed when the box cover 21 is molded.
O The pipe material may be other than the electric pipe 60, or may not be uneven.

The wiring box 10 may be installed on the earth wall as the wall of the building. In this case, the fixing unit 31 is fixed to the wooden pillar as the construction material, and the wiring box 10 is installed.
Next, the technical idea that can be grasped from the above embodiment and other examples will be described below.

  (A) A conduit connector is connected to the connection port, and the conduit connector is a connector main body to which the pipe material can be connected, and a nut that can be screwed into a male screw portion formed in the connector main body. The said pipe | tube connection tool is attached to the said wiring box by clamping the said peripheral wall for a cover and the said peripheral wall for boxes with the said connection tool main body and a nut. Wiring box described in the section.

  (B) The wiring box according to claim 3, wherein the thickness of the spacer changes in accordance with a change in shape of the gap.

  K: Gap, W ... Light partition wall as a wall, S ... Box opening, 10 ... Wiring box, 11 ... Box, 13 ... Box peripheral wall, 15 ... Connection port, 15b ... Deformation prevention part, 20a ... Opening, DESCRIPTION OF SYMBOLS 21 ... Box cover, 23 ... Cover peripheral wall, 30 ... Spacer as a deformation | transformation prevention part, 60 ... Electric conduit as a pipe material.

Claims (2)

A box cover made of a sound insulating material having an opening on one side and a bottomed box shape, and having a cover peripheral wall;
It is installed on the back of the wall of the building, and has a box opening on one side and is formed in a box shape, and a box having a peripheral wall for a box having a connection port to which a pipe is connected,
The box cover is integrated with the box covering the entire outer surface of the peripheral wall for the box while opening the box opening,
A gap is formed between the outer surface of the peripheral wall for the box and the inner surface of the peripheral wall for the cover, and a deformation preventing portion is provided outside the connection port, and the deformation preventing portion is located outside the connection port. The box cover is prevented from being deformed by the connection of the pipe material to the connection port without interposing the gap between the outer surface of the box peripheral wall and the inner surface of the cover peripheral wall facing the outer surface. A wiring box characterized by that. 2. The wiring box according to claim 1 , wherein the deformation preventing portion is a spacer disposed between an outer surface of the peripheral wall for the box and an inner surface of the peripheral wall for the cover.