JP5912342B2 - Wiring box - Google Patents

Description

  In the present invention, a connection hole for connecting a conduit is formed in at least one of the pair of first side walls, and an insertion opening that opens to the side of the box body and communicates with the connection hole is formed in the second side wall. It relates to the formed wiring box.

  An example of this type of wiring box is Patent Document 1. As shown in FIG. 6A, a wiring box 80 disclosed in Patent Document 1 includes a box body 81 having a square box shape, and an upper side wall 81a and a lower side wall (not shown) of the box body 81. The two connection holes 82 are formed. Each connection hole 82 is formed at a position biased toward the right side and the left side of the upper side wall 81a and the lower side wall, and between the adjacent connection holes 82, the walls of the upper side wall 81a and the lower side wall are provided. The part 81b is located.

  An insertion opening 83 is formed in the right side wall 81 c of the box body 81, and the insertion opening 83 communicates with the connection hole 82. The conduit 90 is inserted into the insertion opening 83 from the right side of the wiring box 80, and the conduit 90 is slid toward the connection hole 82 to connect the conduit 90 to the connection hole 82. A cable 84 is inserted into the conduit 90. Further, in the connected state of the conduit 90 to the connection hole 82, movement of the conduit 90 toward the opposite connection hole 82 is restricted by the contact of the conduit 90 with the wall portion 81 b and the conduit 90. Is positioned.

  By the way, in recent years, the diameter of the conduit 90 tends to increase due to the reason that the cable 84 can be easily inserted. Therefore, as shown in FIG. 6B, in order to enable connection of a large-diameter conduit 91 larger than the conduit 90, the opening width of one connection hole 82 communicating with the insertion opening 83 is set to the other. It is conceivable to make it wider than the connection hole 82.

JP 2005-51990 A

However, when the large diameter conduit 91 is connected to the connection hole 82, a part along the radial direction of the large diameter conduit 91 protrudes from the insertion opening 83 to the outside of the connection hole 82. Then, in the large-diameter conduit 91, a part of the inside faces the internal space of the large-diameter conduit 91, and the other part faces the end 81d of the right side wall 81c. For this reason, when the cable 84 is pulled into the wiring box 80 while being inserted into the large diameter conduit 91, the end 81 d of the right side wall 81 c interferes with the insertion end of the cable 84, and the cable 84 to the wiring box 80. There was a problem that it was difficult to perform the wiring work.

  The present invention has been made in view of the above-described conventional problems, and an object thereof is to provide a wiring box capable of easily performing cable wiring work.

In order to solve the above problems, the invention according to claim 1 is directed to a bottom wall, a first side wall erected from a pair of side edges facing the top and bottom of the bottom wall, and a pair of facing left and right A second side wall provided upright from the side edge; and a box body that opens to one side from the second side wall, and at least one of the pair of first side walls is formed with a connection hole for connecting a conduit tube into which a cable is inserted. The connection hole is formed at a position biased toward at least one side of the second side wall, and an insertion opening that opens to the side of the box body and communicates with the connection hole is formed in the second side wall. A part of the conduit in the radial direction protrudes to the side of the box body from the insertion opening, and a part of the inside of the conduit faces the internal space of the box body. And the other part is the shape of the insertion opening. In the wiring box in which the conduit is connected in a state of being opposed to the end face of the second side wall that has been inserted, the other portion inside the conduit on the second sidewall is inserted into the conduit. A guide part for guiding the cable to the internal space is formed, and the guide part is formed in a guide part forming body protruding as a rib from the second side wall to the side of the box body, and the guide part is The gist of the present invention is to have a guide surface fixed to the second side wall and inclined at a certain angle toward the internal space of the box body.

The invention according to claim 2 is summarized in that, in the wiring box according to claim 1, the connection hole is formed at a position biased toward both the second side walls .

The invention according to claim 3 is the wiring box according to claim 1 or 2 , wherein the box body is fixed to the structure in the building on the outer surface of the second side wall in which the insertion opening is formed. A contact seat that contacts the structure is formed, and the corresponding seat protrudes to the side of the box body rather than a part of the conduit that projects to the side of the box body. And

  According to the present invention, the cable wiring work can be easily performed.

The perspective view which shows the wiring box and electrical conduit of embodiment. (A) is a top view which shows a wiring box, (b) is a partially broken front view which shows the guide part of a wiring box. The perspective view which shows the state by which the conduit tube was connected to the wiring box. The front view which shows the state by which the wiring box was fixed to the pillar. The cross-sectional view which shows the state by which the cable was wired by the wiring box. (A) And (b) is a top view which shows background art.

Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS.
As shown in FIG. 1, a large-diameter conduit 10 as a conduit connected to a wiring box 11 is formed into a flexible pipe shape from a synthetic resin material, and has a ring shape with the same diameter protruding in the circumferential direction. Are formed in a concavo-convex shape by repeatedly and continuously forming a ring-shaped portion 10b having a ring shape with the same diameter. In addition, as a conduit tube, the small diameter conduit tube (not shown) which makes a smaller diameter than the large diameter conduit tube 10 also exists, and there are a plurality of types of small diameter conduit tubes having different tube diameters. As shown in FIG. 3, a cable 24 is inserted into the large-diameter conduit tube 10, and the cable 24 is drawn into the internal space S of the wiring box 11.

  Next, the wiring box 11 will be described. As shown in FIGS. 1 and 2, the box body 13 of the wiring box 11 includes a bottom wall 12 having a rectangular plate shape and a first side wall erected from a pair of side edges facing the top and bottom of the bottom wall 12. And a left side wall 12c and a right side wall 12d as second side walls standing from a pair of side edges facing the left and right sides of the bottom wall 12. And the box main body 13 is formed in the square box shape opened to one surface. In the box main body 13, an internal space S surrounded by the bottom wall 12, the upper side wall 12a, the lower side wall 12b, the left side wall 12c, and the right side wall 12d is formed.

  A rectangular parallelepiped contact seat 14 having a constant thickness is formed on the outer surface of the right side wall 12d so as to protrude outward. As shown in FIG. 4, a plurality of ribs 12e are formed on the outer surface of the left side wall 12c. Is provided so as to extend in the depth direction of the box body 13. Further, as shown in FIG. 1, reinforcing ribs 12f project from the opening side outer surfaces of the upper side wall 12a, the lower side wall 12b, and the left side wall 12c so as to straddle the three side walls 12a, 12b, and 12c. . The rib 12e and the reinforcing rib 12f of the left side wall 12c are continuous.

  A plurality of fixing holes 15 penetrating the side walls 12c and 12d are formed in the left side wall 12c and the right side wall 12d so as to extend in a long hole shape in the depth direction of the box body 13, and the fixing holes 15 are Each is formed so that a fixing screw (not shown) can be inserted therethrough. As shown in FIG. 3, the fixing screw inserted through the fixing hole 15 is fixed to the pillar H as a structure in the building, so that the wiring box 11 is fixed to the pillar H.

  As shown in FIG. 1, semicircular connection holes 20 are formed through the respective side walls 12a and 12b at positions on the upper side wall 12a and the lower side wall 12b that are biased toward the left side wall 12c and the right side wall 12d. Has been. On the upper side wall 12a and the lower side wall 12b, a wall part 121 is located at a position sandwiched between the connection holes 20, and the upper side wall 12a and the lower side wall 12b along the depth direction of the box main body 13 by the wall part 121. The strength of is secured. In addition, insertion openings 21 are formed at both upper and lower ends of the left side wall 12c and the right side wall 12d so as to penetrate the left side wall 12c and the right side wall 12d. It is formed to open to the left and right. Each insertion opening 21 is formed so as to communicate with each connection hole 20, and is formed so that the large-diameter conduit 10 can be inserted into each connection hole 20 from each insertion opening 21. As shown in FIG. 5, the opening width of the insertion opening 21 along the depth direction of the box body 13 is formed to be the same as or slightly larger than the outer diameter of the ridge portion 10 a of the large diameter conduit 10.

  As shown in FIG. 2A, the engagement protrusion 22 is formed along the inner periphery of each connection hole 20. Each engagement protrusion 22 is formed so as to extend linearly from the insertion opening 21 side of the connection hole 20 toward the back of the connection hole 20 and further along an arc of the connection hole 20. The opening width of the connection hole 20 along the depth direction of the box body 13 is formed to be slightly shorter than the outer diameter of the ridge portion 10 a of the large diameter conduit 10. When the large diameter conduit 10 is inserted into the connection hole 20 from the insertion opening 21, the engagement protrusion 22 can be engaged with the concave portion 10 b of the large diameter conduit 10.

  In each engagement ridge 22, a retaining portion 23 having a thickness dimension larger than that of the engagement ridge 22 is formed on the end edge on the insertion opening 21 side. Each retaining portion 23 is formed so as to protrude outward from one surface which is the outer surface of the box body 13. In each retaining portion 23, the distal end portion located on the insertion opening 21 side is formed so as to be inclined from the insertion opening 21 side toward the back of the connection hole 20. The maximum thickness dimension of each retaining portion 23 is set to be larger than the width of the concave strip portion 10b, that is, the interval between adjacent convex strip portions 10a.

  The engagement protrusion 22 can also be engaged with a small-diameter small-diameter pipe that is one size smaller than the large-diameter electric conduit 10, and the small-diameter electric conduit can be connected to the connection hole 20. Further, although not shown, a small diameter engaging ridge is formed on the inner peripheral side of the engaging ridge 22 in the same shape as the engaging ridge 22, and the small diameter engaging ridge is used to further reduce the diameter. The small-diameter conduit may be connectable to the connection hole 20.

  As shown in FIG. 1, FIG. 2 (a) and FIG. 2 (b), in the left side wall 12c and the right side wall 12d, the guide portion forming bodies 30 are respectively outward on the outer surfaces closer to the center than the respective insertion openings 21. Projected to. The guide portion forming body 30 is formed in a rectangular plate shape that extends over the entire depth direction of the box body 13. In each guide portion forming body 30, one end on the opening side of the box body 13 is integrated with the back surface of the reinforcing rib 12f, and the other end on the bottom wall 12 side is on the back side from each of the left and right sides of the bottom wall 12. Exposed. The end surface facing the insertion opening 21 in each guide portion forming body 30 is formed in a smooth surface shape that inclines toward the center of the box body 13 from the outside to the inside of the box body 13, and the guide surface 30 a is formed by this inclined surface. Is formed. In other words, the guide surface 30a formed on the guide portion forming body 30 near the upper side wall 12a is inclined downward toward the center of the box body 13 from the upper side wall 12a side toward the lower side wall 12b side. On the other hand, the guide surface 30a formed on the guide portion forming body 30 near the lower side wall 12b is inclined downward toward the center of the box body 13 from the lower side wall 12b side to the upper side wall 12a side. That is, each guide surface 30 a is inclined downward toward the center of the box body 13 along the insertion direction of the cable 24 into the box body 13.

  The guide portion forming body 30 formed on the left side wall 12c is formed using the rib 12e closest to the insertion opening 21 among the plurality of ribs 12e formed on the left side wall 12c. Further, the guide portion forming body 30 formed on the right side wall 12d is integrated with the reinforcing rib 12f, and also functions as the reinforcing rib of the right side wall 12d.

  Further, in the guide portion forming body 30 formed on the right side wall 12d, the protruding length of the box body 13 toward the outside is substantially the same as the protruding length of the contact seat portion 14 toward the outside of the box body 13. (Slightly shorter). In other words, the guide portion forming body 30 of the right side wall 12d secures the projection length by utilizing the projection length of the abutment seat portion 14 to the maximum. Therefore, the guide portion forming body 30 of the right side wall 12d has a longer projecting length than the guide portion forming body 30 of the left side wall 12c, and the guide surface 30a of the right side wall 12d is the guide surface of the left side wall 12c. The length in the inclination direction is longer than 30a. And in this embodiment, the guide part 40 is formed from the guide part formation body 30 and the guide surface 30a.

  On the inner surfaces of the upper side wall 12 a and the right side wall 12 d, a boss portion B projects toward the inside of the box body 13 at a position sandwiched between the connection holes 20 on the opening side of the box body 13. Further, as shown in FIG. 2A, a nut N is embedded in each boss portion B. Further, each boss portion B is formed with an insertion hole Ba through which the female screw of the nut N faces the outside of the boss portion B. Then, as shown in FIG. 5, the screw 34 inserted through the insertion hole Ba is screwed into the nut N. As shown in FIG. 1, a connecting piece 31 is installed between the end surface of each boss B on the bottom wall 12 side and the bottom wall 12, at a position facing the wall 121.

Next, the operation of the wiring box 11 having the above configuration will be described together with the installation method.
First, the large diameter conduit 10 is moved in the radial direction toward the wiring box 11 from both the left and right sides of the wiring box 11. Then, the end portion of the large-diameter conduit tube 10 is inserted into the left and right insertion openings 21 of the upper side wall 12a, and the retaining portion 23 serving as the tip of the engaging protrusion 22 is inserted into the concave portion 10b. Further, when the large-diameter conduit tube 10 is pushed into the connection hole 20, the retaining portion 23 is smoothly inserted into the concave portion 10 b. When the large-diameter conduit tube 10 is pushed into the back of the connection hole 20, the thickness dimension of the retaining portion 23 becomes thicker than the width of the recessed portion 10 b, so that the pair of projecting portions 10 a are moved outward by the retaining portion 23. To be elastically deformed and spread.

  Then, when the large-diameter conduit tube 10 is pushed into the connection hole 20 with the pair of ridges 10 a being swelled, the engagement protrusions 22 positioned deeper in the connection hole 20 than the retaining portion 23 are. The concave strip portion 10b comes into contact with the inner peripheral edge. At the same time, the retaining portion 23 passes through the concave portion 10b and is located outside the large-diameter conduit 10, and is in a position that can be engaged with the outer surface of the convex portion 10a located above the concave portion 10b. Arranged. As a result, as shown in FIG. 3, the large-diameter conduit tube 10 is connected to each connection hole 20.

  As shown in FIGS. 4 and 5, in a state where the large-diameter conduit tube 10 is connected to the connection hole 20, a part of the inside of the large-diameter conduit tube 10 is an internal space of the box body 13 via the connection hole 20. While facing S, the inside of the large-diameter conduit 10 and the internal space S are in communication. However, in the large-diameter conduit 10, a part of the radial direction located on the insertion opening 21 side protrudes to the side of the box body 13 from the insertion opening 21. In other words, a part of the large diameter conduit 10 protrudes to a position beyond the outer surfaces of the left side wall 12c and the right side wall 12d.

  For this reason, the ends of the left side wall 12c and the right side wall 12d are opposed to the left side wall 12c and the right side wall 12d, which are the other parts that do not face the internal space S, in the inside of each large diameter conduit 10. Yes. That is, the guide surface 30 a of each guide portion forming body 30 is exposed inside each large diameter conduit 10. At this time, the guide surface 30 a is exposed so as to straddle the front-rear direction inside the large-diameter conduit tube 10. Therefore, when the large diameter conduit 10 is connected to the connection hole 20, the entire inside of the large diameter conduit 10 is closed by the internal space S and the guide surface 30a.

  In addition, since the guide part formation body 30 of the left side wall 12c is shorter than the guide part formation body 30 of the right side wall 12d, the large-diameter conduit 10 connected to the connection hole 20 on the left side wall 12c side has a diameter. A part of the direction protrudes outward from the guide part forming body 30. On the other hand, the large diameter conduit 10 connected to the connection hole 20 on the right side wall 12d side does not protrude outward from the guide portion forming body 30, and the large diameter conduit 10 is inside the guide portion forming body 30. Is located.

  Further, in a state where the large diameter conduit 10 is connected to both the connection holes 20 of the upper side wall 12a, the wall portion 121 of the upper side wall 12a is located between each large diameter conduit 10, and the connecting piece 31 is positioned. Therefore, the wall portion 121 of the upper side wall 12a and the connecting piece 31 prevent one large-diameter conduit 10 from moving toward the other large-diameter conduit 10 (connection hole 20).

  Next, the outer surface of the contact seat 14 is brought into contact with the side surface of the column H so that the open end of the box body 13 is flush with the front surface of the column H. Then, among the three fixing holes 15 formed in the right side wall 12d, a fixing screw is inserted into the fixing hole 15 located in the center, and the fixing screw is fixed to the column H, and the wiring box 11 is fixed to the column H. To do.

  Next, the cable 24 is pulled into the wiring box 11 while being inserted into each large diameter conduit 10. When the insertion end of the cable 24 inserted into the large-diameter conduit 10 abuts on each guide surface 30a, the cable 24 is guided toward the center of the box body 13 by its inclination. Subsequently, when the cable 24 is inserted into the large-diameter conduit 10, the outer surface of the cable 24 is slidably contacted with the guide surface 30 a and is guided toward the center of the box body 13.

  After that, as shown in FIG. 5, wall materials Wa are erected on both the front and rear sides of the pillar H to construct the wall W, and the wiring box 11 is installed in the wall W. Next, a wall hole Wb is formed in the wall material Wa on the front side of the wall W so that the opening of the box body 13 faces the front side of the wall W. A wiring device 35 is connected to the cable 24 drawn into the wiring box 11, and a screw 34 is inserted into the holding frame 36 that holds the wiring device 35. The screws 34 are inserted into the insertion holes Ba of the wiring box 11 and screwed into the nuts N, and the holding frame 36 is fixed to the wiring box 11. At this time, the screw 34 is screwed through the nut N so as to extend in the depth direction in the internal space S of the box body 13, but both large-diameter conduit tubes 10 are constant due to the presence of the wall portion 121 of the upper side wall 12 a. Therefore, the screw 34 is prevented from interfering with the large diameter conduit 10. Finally, the decorative plate 37 is attached to the wall material Wa so as to cover the holding frame 36, and the wiring device 35 is installed on the wall W.

According to the above embodiment, the following effects can be obtained.
(1) The wiring box 11 is configured to connect the large-diameter conduit 10 to the connection hole 20 from the insertion opening 21 that opens to the side of the box body 13. A part projects laterally from the insertion opening 21. A part of the inside of the large-diameter conduit 10 faces the internal space S of the box body 13, and the other part faces the left side wall 12c and the right side wall 12d in which the insertion opening 21 is formed. In the wiring box 11, the guide portion 40 (the guide portion forming body 30 and the guide surface 30 a) is formed at a position where the inside of the large-diameter conduit 10 faces. For this reason, when the cable 24 is inserted into the large-diameter conduit 10, the guide 24 can guide the cable 24 toward the internal space S of the box body 13. Therefore, it is possible to prevent the cable 24 from coming into contact with the left side wall 12c and the right side wall 12d and further preventing the cable 24 from being inserted or bending the cable 24. Wiring work can be performed easily.

  (2) The guide portion 40 includes a guide surface 30 a on the guide portion forming body 30, and each guide surface 30 a is inclined toward the center of the box body 13 as it goes from the outside to the inside of the box body 13. In other words, the guide surface 30 a is inclined downward toward the center of the box body 13 along the insertion direction of the cable 24 into the box body 13. Therefore, the cable 24 inserted into the box body 13 can be guided toward the center of the box body 13 by the guide surface 30a.

  (3) The guide surface 30a is formed in the shape of the inclined smooth surface, respectively. Therefore, when the cable 24 is in sliding contact with the guide surface 30a, the cable 24 can be smoothly guided by the guide surface 30a so as to be directed to the internal space S of the box body 13.

  (4) In the state where the large diameter conduit 10 is connected to the connection hole 20, the inside of the large diameter conduit 10 is opposed to the internal space S of the box body 13 and the guide portions 40. Not exposed to the outside. Therefore, it is possible to prevent dust and the like from entering the inside of the large diameter conduit 10.

  (5) In the state in which the large diameter conduit 10 is connected to the connection hole 20, the inside of the large diameter conduit 10 faces the internal space S of the box body 13 and each guide portion 40. For this reason, even if the cable 24 is inserted toward the guide portions 40 rather than the internal space S, it is possible to prevent the cables 24 from jumping out of the box body 13 by the guide portions 40.

  (6) Each guide portion 40 is formed using a rib extending in the depth direction of the box body 13 in order to ensure the strength of the box body 13. For this reason, the guide unit 40 can easily perform the wiring work of the cable 24 with respect to the wiring box 11 while ensuring the strength of the box body 13.

  (7) The connection holes 20 are formed in the upper side wall 12a and the lower side wall 12b of the box body 13 at positions offset toward the left side wall 12c and the right side wall 12d, respectively. A guide portion 40 is formed on the right side wall 12d. Therefore, even if the large diameter conduit 10 is connected to any of the connection holes 20, the wiring work of the cable 24 with respect to the wiring box 11 can be easily performed.

  (8) The guide portion 40 is formed in the guide portion forming body 30 that protrudes from the left side wall 12c and the right side wall 12d to the side of the box body 13. For this reason, the protrusion length of the guide part 40 can be lengthened compared with the case where the guide part 40 (guide surface 30a) is formed in the thickness of the left side wall 12c and the right side wall 12d, for example. Therefore, it is possible to secure a large area of the guide portion 40 and to guide the cable 24 easily. Furthermore, even if a small diameter conduit is connected to the connection hole 20, the guide portion 40 can be opposed to the inside of the small diameter conduit, and the cable 24 inserted into the small diameter conduit can also be guided. .

  (9) On the outer surface of the right side wall 12d of the box main body 13, when the wiring box 11 is fixed to the column H, a contact seat portion 14 is provided so as to abut on the side surface of the column H. And the protrusion length to the box main body 13 side of this contact seat part 14 is longer than the protrusion length to the box main body 13 side of the large diameter conduit 10 connected to the connection hole 20 by the right side wall 12d side. It has become. For this reason, even if the large-diameter conduit 10 is connected to the connection hole 20 on the right side wall 12d side, the contact seat 14 can be brought into contact with the column H, and the wiring box 11 can be fixed to the column H. Can do.

  (10) The guide portion forming body 30 formed on the right side wall 12d of the box body 13 has a protruding length to the side of the box body 13 that is substantially the same as the protruding length of the abutment seat portion 14. The guide portion forming body 30 is formed using the maximum length that can protrude from the right side wall 12d. Therefore, the guide part 40 can be formed to be as large as possible, the area of the guide surface 30a can be secured large, and the cable 24 can be easily guided.

  (11) The connection hole 20 is formed at a position biased toward the left side wall 12c and the right side wall 12d in the upper side wall 12a and the lower side wall 12b of the box body 13, and a wall 121 is formed between the both connection holes 20. Is formed. Further, the boss part B is located between the connection holes 20, and the screw 34 screwed into the boss part B passes between the connection holes 20, and the screw 34 does not interfere with the large-diameter conduit 10. It is like that. That is, the wiring box 11 of the present embodiment is different from the type in which long hole-like connection holes are formed in almost the entire upper wall 12a and lower wall 12b. This type can only be connected. For this reason, in the wiring box 11, when the large diameter conduit 10 is connected to the connection hole 20, a part of the radial direction protrudes from the insertion opening 21, and the inside of the large diameter conduit 10 is narrowed. However, by forming the guide portion 40, the cable 24 inserted into the large-diameter conduit tube 10 can be easily inserted into the internal space S of the box body 13, and the disadvantages peculiar to the wiring box 11 are eliminated.

In addition, you may change the said embodiment as follows.
In the embodiment, the contact seat 14 is formed only on the right side wall 12d of the box body 13, but the contact seat 14 may be formed on the left side wall 12c.

  In the embodiment, in the box body 13, the rib 12 e is formed on the left side wall 12 c where the contact seat 14 is not formed, and the guide portion 40 (guide portion forming body 30) is formed using the rib 12 e. However, it is not limited to this. For example, the rib 12e of the left side wall 12c may be deleted, the outer surface of the left side wall 12c may be a smooth surface, and only the guide portion forming body 30 may be provided on the outer surface of the left side wall 12c to form the guide portion 40. Good.

  In the embodiment, the guide portion forming body 30 is projected on the outer surface of the left side wall 12c and the right side wall 12d of the box body 13, and the guide portion 40 is formed using the guide portion forming body 30, but the left side wall 12c In addition, a guide surface may be formed within the thickness of the right side wall 12d to form a guide portion.

  In the embodiment, the connection holes 20 are formed near the left side wall 12c and the right side wall 12d in the upper side wall 12a and the lower side wall 12b of the box main body 13, respectively. In the upper side wall 12a and the lower side wall 12b, the connection hole 20 is formed only near the left side wall 12c or the right side wall 12d, and the guide portion 40 is formed on the left side wall 12c or the right side wall 12d corresponding to the connection hole 20. Also good. Furthermore, in the embodiment, the connection holes 20 are formed in both the upper wall 12a and the lower wall 12b. However, the connection holes 20 are formed only in the upper wall 12a or only in the lower wall 12b, and the upper wall corresponding to the connection hole 20 is formed. You may form the guide part 40 only in 12a side or the lower wall 12b side.

  In the embodiment, the guide surface 30a of the guide portion 40 is a smooth surface that inclines toward the center of the box body 13 from the outside to the inside of the box body 13, but is not limited thereto. For example, the guide surface 30a may have an arc shape that gently curves while being recessed or bulging from the outside to the inside of the box body 13.

  In embodiment, although the guide part 40 was formed so that it might extend over the whole depth direction of the box main body 13, it is not restricted to this. For example, when the large diameter conduit 10 is connected to the connection hole 20, the guide portion 40 (guide surface 30 a) may be formed only in a portion where the other portion inside the large diameter conduit 10 faces.

  In the embodiment, after the large-diameter conduit tube 10 is connected to the connection hole 20, the wiring box 11 is fixed to the column H. However, after the wiring box 11 is fixed to the column H, it opens to the side of the box body 13. The large diameter conduit 10 may be inserted into the insertion opening 21 and the large diameter conduit 10 may be connected to the connection hole 20.

Next, the technical idea that can be grasped from the above embodiment and other examples will be described below.
(A) The guide portion includes a guide surface formed on the guide portion forming body, and the guide surface is inclined downward toward the center of the box body as it goes from the outside to the inside of the box body. The wiring box according to claim 3 or 4.

  (B) The guide portion forming body is formed using a rib formed on the second side wall, according to any one of claims 3, 4 and technical idea (A). Wiring box.

  H: Column as a structure, S: Internal space, 10: Large diameter conduit as a conduit, 11 ... Wiring box, 12 ... Bottom wall, 12a ... Upper sidewall as a first sidewall, 12b ... As a first sidewall Lower side wall, 12c ... Left side wall as second side wall, 12d ... Right side wall as second side wall, 13 ... Box body, 14 ... Abutting seat, 20 ... Connection hole, 21 ... Insertion opening, 24 ... Cable, 30 ... guide part forming body, 40 ... guide part.

Claims (3)

A box that opens to one side from a bottom wall, a first side wall erected from a pair of side edges facing the top and bottom of the bottom wall, and a second side wall erected from a pair of side edges facing left and right With a body,
A connection hole for connecting a conduit tube into which a cable is inserted is formed in at least one of the pair of first side walls, and the connection hole is formed at a position biased toward at least one side of the second side wall. And
An insertion opening that opens to the side of the box body and communicates with the connection hole is formed in the second side wall,
In the connection hole, a part of the conduit tube in the radial direction protrudes from the insertion opening to the side of the box body, and a part of the inside of the conduit tube faces the internal space of the box body. In the wiring box to which the conduit is connected in a state where the portion faces the end surface of the second side wall in which the insertion opening is formed,
Forming a guide portion for guiding the cable inserted into the conduit to the internal space at a position where the other portion inside the conduit on the second side wall opposes,
The guide part is formed in a guide part forming body protruding as a rib from the second side wall to the side of the box body,
The wiring box, wherein the guide part has a guide surface fixed to the second side wall and inclined at a certain angle toward the internal space of the box body.   The wiring box according to claim 1, wherein the connection hole is formed at a position biased toward both the second side walls. On the outer surface of the second side wall in which the insertion opening is formed, a contact seat that contacts the structure when the box body is fixed to the structure in the building is formed. The wiring box of Claim 1 or 2 which protrudes in the side of the said box main body rather than the part of the conduit tube which protrudes in the side of the said box main body.

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