Wiring box device and outer covering material

Abstract

To provide a wiring box device in which an opening through which a cable and a conduit pipe are inserted can be formed in a polymer material which covers a wiring box, in accordance with differences in thickness of the cable and the conduit pipe.SOLUTION: A wiring box device 1 includes: a wiring box 10 including a through hole 15 which allows direct connection of a conduit pipe or connection via a connection member at a peripheral wall 11 composed of a bottom wall 12 and a side wall 13; and a polymer material 20 overlapped with the peripheral wall 11 of the wiring box 10. The polymer material 20 includes: a large hole formation part 26 whose outline is displayed by a display part 27 and which forms a gap for directly connecting the conduit pipe to the through hole 15 or for attaching a connection member; and a small hole formation part 32 which is arranged inside the outline of the large hole formation part 26 and forms a through hole part 35 whose area is smaller than that of the large hole formation part 26. The outline of the small hole formation part 32 is formed by small hole perforations 33 so that it is easier to break than the display part 27.SELECTED DRAWING: Figure 10

Description

[Technical field]

[0001] The present invention relates to a wiring box device and an outer covering material for covering the peripheral wall of a wiring box to be installed on a wall surface of a building with a polymeric material such as a sheet. [Background technology]

[0002] The exterior of a wiring box may be covered with a sheet material for heat insulation, sound insulation, fire resistance, etc. For example, a wiring box made of synthetic resin is not fire resistant, so if it burns in a fire, there is a risk that the flames will flow behind the wall. Therefore, measures may be taken to prevent the flames from flowing behind the wall by covering the entire exterior surface of the surrounding wall of the wiring box with a fireproof sheet. Patent Document 1 discloses a fire-resistant wiring box in which a sheet material made of aluminum formed to a thickness that allows a cable to pass through is attached so as to cover the entire exterior surface of the surrounding wall of the wiring box.

[0003] Here, a cable insertion hole is formed in the peripheral wall of the wiring box to insert the cable wired behind the wall into the inside of the wiring box, and a U-shaped cut is formed in the sheet material at a corresponding position along a part of the edge of the cable insertion hole. This cut is cut away when a conduit is connected to the cable insertion hole or when a cable is inserted and pulled into the wiring box, and the part inside the cut is turned up. When a conduit is then connected to the cable insertion hole, the cable is inserted into the conduit and pulled into the wiring box. When a cable is directly inserted into the cable insertion hole, the part inside the cut of the sheet material is attached to the outer surface of the cable. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2012-244816 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the fire-resistant wiring box described in Patent Document 1, the opening formed by cutting away the notch in the sheet material is shaped to match the outer size of the electric conduit to be attached to the cable insertion hole of the wiring box. Therefore, when the cable is directly inserted into the cable insertion hole and wired into the wiring box, the opening in the sheet material is too large compared to the outer size of the cable, and a gap is created between the opening in the sheet material and the cable, which creates a risk of flames flowing behind the wall through the gap.

[0006] Therefore, an object of the present invention is to provide a wiring box device and an outer covering material that can form openings in the polymeric material covering the wiring box through which cables and conduits can be inserted in accordance with differences in thickness. [Means for solving the problem]

[0007] The wiring box device of claim 1 includes a peripheral wall including a bottom wall and a side wall extending from a periphery of the bottom wall, the peripheral wall being configured to have a bottomed box shape with an opening on a front side, the peripheral wall being configured to be connectable to a conduit directly or via a connecting member, and a wiring box having a through hole through which a cable passes; a polymeric material that is laminated on the peripheral wall of the wiring box; In the polymer material, a portion overlapping the through hole and having the same thickness is provided with a large hole forming portion that forms a gap for directly connecting the electric conduit to the through hole or for attaching the connecting member by removing an inside of the outline displayed by a display portion; a small hole forming portion that is partially or entirely disposed inside the outline of the large hole forming portion and forms a through-hole having an area smaller than that of the large hole forming portion; The outline of the small hole forming portion is bordered by a small hole perforation cut in the thickness direction so that it is easier to break than the display portion, and the through portion is formed by breaking along the small hole perforation and removing the inside.

[0008] In the wiring box device of claim 2, in particular, the display portion is formed by perforations for large holes cut in the thickness direction, and the perforations are coarser than the perforations for small holes. Here, coarse perforations means that the pitch of the perforations is large and the uncut connecting portions between the perforations are relatively long. As a result, since the connecting portion without the notches of the perforations is long, it is difficult to break along the perforations, and the large hole forming portion is more difficult to break than the small hole forming portion. In the wiring box device of claim 3, particularly, the display portion is formed by a large-hole perforation cut with a smaller cut amount in the thickness direction than a small-hole perforation. This makes the large hole forming portion less likely to break than the small hole forming portion.

[0009] In the wiring box device of claim 4, the indication is particularly formed by a line or a difference in color applied to the surface of the polymeric material, or a linear marking or groove recessed from the surroundings. The wiring box device of claim 5 is particularly characterized in that the polymeric material is laminated in a thickness direction in a plurality of layers, The display portion is formed by a large hole cut portion cut in the thickness direction, The perforation for the small hole has more layers cut into it than the indicia. As a result, the small hole formation portion is more likely to break than the display portion since there are more cut layers. In the wiring box apparatus of claim 6, particularly, the polymeric material covers the wiring box from the outside and is adhesively fixed to the outer surface of the peripheral wall.

[0010] The outer cover material of claim 7 is a box-shaped material having a bottom and an opening on a front side, the box-shaped material being made of a peripheral wall including a bottom wall and a side wall extending from a peripheral edge of the bottom wall, and the outer cover material covers from the outside a wiring box having a through hole penetrating the peripheral wall, In the portion overlapping the through hole and having the same thickness, a large hole forming section whose outline is displayed by a display section; a small hole forming portion that is partially or entirely disposed inside the outline of the large hole forming portion and forms a through-hole having an area smaller than that of the large hole forming portion; The outline of the small hole forming portion is bordered by a small hole perforation cut in the thickness direction so that it is easier to break than the display portion, and the through portion is formed by breaking along the small hole perforation and removing the inside.

[0011] The outer skin material of claim 8 is particularly made of a sheet material having a uniform thickness, and is folded to form a box-shaped body that is overlapped with the peripheral wall. This allows the covering material to be formed into a box-like body inexpensively and easily, and since it is in sheet form before being attached to cover the wiring box, it is easy to handle and not bulky, making it easy to transport. In the outer cover material of claim 9, in particular, the small hole perforation penetrates in the thickness direction, and the display portion is composed of the large hole perforation cut into a part in the thickness direction. This makes the small hole formation portion more susceptible to breaking than the display portion. Effect of the Invention

[0012] In the present invention, a polymeric material overlaid on the peripheral wall of a wiring box is provided at a location overlapping with a through hole of the wiring box with a large hole forming portion forming a gap for connecting a conduit to the through hole directly or via a connecting member, and a small hole forming portion disposed inside the contour of the large hole forming portion and forming a through portion with an area smaller than that of the large hole forming portion. Therefore, by removing the inside of the contour of the large hole forming portion, a gap which is an opening for connecting a conduit or the like can be formed. In addition, by removing the inside of the small hole forming portion, a through portion which is an opening through which a cable is inserted can be formed. That is, openings through which the cable and the conduit are inserted can be formed in the polymeric material and the outer cover material in accordance with the difference in thickness of the cable and the conduit. The contour of the small hole forming portion is easier to break than the large hole forming portion, and can be broken along the small hole perforation by pressing. [Brief description of the drawings]

[0013] [Figure 1] 1 is an exploded perspective view of a wiring box device according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a perspective view of the wiring box of FIG. [Diagram 3] 2 shows the polymeric material of FIG. 1, where (a) is a front view, (b) is a right side view, and (c) is a rear view. [Figure 4] 4A and 4B are a cross-sectional view of the polymeric material showing the cut depth of the large hole perforations in the large hole forming portion and the small hole perforations in the small hole forming portion of FIG. 3, and a front view of the polymeric material showing the pitch of the perforations of the large hole perforations in the large hole forming portion and the small hole perforations in the small hole forming portion of FIG. [Diagram 5] 4 is a front view showing the polymeric material from which the inside of the large hole forming portion in FIG. 3 has been removed. [Figure 6] 6A is a perspective view showing a state immediately before the outer surface of the wiring box is covered with the polymeric material of FIG. 5, and FIG. 6B is a perspective view showing a state after covering. [Figure 7] FIG. 7 is a perspective view showing a state in which the wiring box covered with the polymeric material in FIG. 6(b) is fixed to a pillar. [Figure 8] 8(a) is a perspective view showing a state in which a conduit is connected to a through hole of the wiring box of FIG. 7, and (b) is a plan view showing a state in which a wall material is then erected in front of the wiring box device. [Figure 9] 4 is a front view showing the polymeric material from which the inside of the small hole forming portion in FIG. 3 has been removed. FIG. [Figure 10] 10 is a perspective view showing a state in which the wiring box covered with the polymeric material in FIG. 9 is fixed to a pillar. [Figure 11] 11 is a perspective view showing a state in which a cable is inserted into a through-hole of the wiring box of FIG. 10. FIG. [Figure 12] 4 is a cross-sectional view of a polymeric material showing the number of cut layers in the large hole perforations of the large hole forming portion and the small hole perforations of the small hole forming portion in FIG. 3 . FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, a wiring box device and an outer cover material according to an embodiment of the present invention will be described with reference to the drawings. The wiring box apparatus of this embodiment has sound insulation properties that prevent noise and other disturbances from propagating between the inside and outside of a wall material through a wiring box installed on a wall surface.

[0015] 1 to 4, the wiring box device 1 comprises a wiring box 10 having a peripheral wall 11 with through holes 15 to which a conduit 40 can be connected directly or via a connecting member, and a polymeric material 20 superimposed on the peripheral wall 11 of the wiring box 10. The polymeric material 20 is provided with a large hole forming portion 26 whose outline is indicated by an indication portion 27 and which forms a gap 31 for directly connecting the conduit 40 to the through hole 15 or for attaching a connecting member, and a small hole forming portion 32 which is disposed inside the outline of the large hole forming portion 26 and forms a penetration portion 35 shown in FIG. 10 having an area smaller than that of the large hole forming portion 26, and the outline of the small hole forming portion 32 is bordered by a small hole perforation 33 so that it can be easily torn from the indication portion 27. Each member will be described below.

[0016] First, the wiring box 10 is fixed to a pillar 52 behind a wall as shown in Fig. 7 etc., is made of a synthetic resin material, and as shown in Fig. 2, is formed into a bottomed rectangular box shape having an opening 14 on the front side by a peripheral wall 11 consisting of a bottom wall 12 and a side wall 13 erected from the peripheral edge of the bottom wall 12. Two through holes 15 are formed in each of the upper side wall 13a and the lower side wall 13b in Fig. 2, to which the electric conduit 40 can be connected directly or via a connecting member such as a connector, and through which the cable 41 passes, and the inner diameter of the through holes 15 is formed to be approximately the same size as the outer diameter of the electric conduit 40.

[0017] A boss portion 16 is provided on the inner surface of each of the horizontally middle portions of the upper side wall 13a and the lower side wall 13b, facing from the bottom wall 12 toward the opening 14. A wiring device (not shown) is attached to the boss portion 16 by screwing a screw. After a wall material 50 is provided in front of the wiring box 10 installed behind the wall, a detectable portion 17 is provided in the center of the bottom wall 12, for magnetically detecting the installation position of the wiring box 10 from the front side of the wall with a magnet detector (not shown), and a magnet 17a is held at the tip of the detectable portion 17.

[0018] 2 has a plurality of insertion holes 18, four in this embodiment, through which fixing screws are inserted to be screwed into the pillar 52 in order to install the wiring box 10. A contact portion 19 that contacts the side surface of the pillar 52 is provided on the outer surface of the left side wall 13c and protrudes outward.

[0019] 3 and 4, the polymer material 20 is made of a sheet material 21 having a uniform thickness and a three-layer structure over the entire surface, and is formed into a substantially cross-shaped band plate shape as a whole. The polymer material 20 is folded at folding lines 25 to become a box-shaped body that is to be superimposed on the peripheral wall 11 of the wiring box 10.

[0020] Specifically, the polymer material 20 has a thicker middle portion formed of a butyl layer 21b made of butyl rubber, an inner surface side facing the peripheral wall 11 of the wiring box 10 is laminated with a release paper 21c, and an aluminum foil 21a is laminated on the outer surface opposite the butyl layer 21b. Because butyl rubber has adhesiveness, the polymer material 20 can be directly attached to the peripheral wall 11 of the wiring box 10 after the release paper 21c is peeled off. Therefore, there is no need to provide an adhesive layer coated with an adhesive or the like on the surface of the butyl layer 21b facing the release paper 21c. However, an adhesive layer may be provided when the polymer material 20 is to be attached more firmly. The aluminum foil 21a has a function of damping the butyl layer 21b. Note that in the figures other than FIG. 4, the aluminum foil 21a and the release paper 21c of the polymer material 20 are omitted.

[0021] The polymeric material 20 has a rectangular bottom wall overlapping portion 22 that overlaps and covers the entire bottom wall 12 of the wiring box 10. A side wall overlapping portion 23 is integrally provided on the same plane from the periphery of the bottom wall overlapping portion 22 toward the outside, and an upper surface overlapping portion 23a and a lower surface overlapping portion 23b are integrally formed from the upper and lower sides of the bottom wall overlapping portion 22, respectively, to extend upward and downward and cover the entire upper side wall 13a and the lower side wall 13b of the wiring box 10, and a left surface overlapping portion 23c and a right surface overlapping portion 23d are integrally formed from the left and right sides of the bottom wall overlapping portion 22, respectively, to extend left and right and cover the entire left side wall 13c and the right side wall 13d of the wiring box 10. Furthermore, the left surface overlapping portion 23c and the right surface overlapping portion 23d have extension portions 24 that extend upward and downward by a predetermined distance from their respective upper and lower ends, and are integrally formed on the same plane. At the boundaries between the bottom wall overlapping portion 22 and each side wall overlapping portion 23 and at the boundaries between each side wall overlapping portion 23 and the extension portion 24, folding lines 25 are indicated by printing, engraving a V-shaped groove, or the like.

[0022] As shown in Fig. 3(a) and Fig. 4(b), at the locations of the upper surface overlapping portion 23a and the lower surface overlapping portion 23b overlapping with the through hole 15 of the wiring box 10, two substantially U-shaped large hole forming portions 26 each consisting of a semicircular portion having the same diameter as the through hole 15 and two straight portions extending in parallel from both ends of the semicircular portion are provided facing each other. The large hole forming portions 26 are further formed in double lines of a first large hole forming portion 26a having a relatively large diameter and a second large hole forming portion 26b having a smaller diameter in correspondence with two types of electric conduits 40 having different diameters. The large hole forming portions 26 have their outlines displayed by display portions 27 and are formed by large hole perforations 29 which are large hole cut portions 28 cut in the thickness direction of the polymerized material 20. The large hole forming portion 26 is broken along the cut line 30 of the large hole perforation 29 and the inside of the display portion 27 is removed, thereby forming a gap 31 which is an opening for directly connecting the conduit 40 to the through hole 15 of the wiring box 10 or for attaching a connecting member, as shown in Figure 5.

[0023] Within the interior surrounded by the contours of each large hole forming portion 26 of the polymerized material 20, a small hole forming portion 32 is provided, which has an area smaller than that of the large hole forming portion 26, is slightly smaller than the outer diameter of the cable 41 to be inserted into the inside of the electric conduit 40, and forms a substantially elliptical through-hole 35 penetrating the polymerized material 20 in the thickness direction. The contour of the small hole forming portion 32 is formed by a small hole perforation 33 cut into the polymerized material 20 in the thickness direction. The small hole forming portion 32 is broken along the cut line 34 of the small hole perforation 33 and the inside is removed to form the through-hole 35 through which the cable 41 is inserted, as shown in FIG. 10. Since the polymerized portion 20 is made of a sheet material 21 having a uniform thickness as a whole, the thicknesses of the large hole forming portion 26 and the small hole forming portion 32 at the portions overlapping with the through-hole 15 are naturally the same.

[0024] As shown in FIG. 4(a), the small hole perforation 33 penetrates the polymeric material 20 in the thickness direction along the cut line 34, whereas the large hole perforation 29 is cut only in a part of the thickness direction of the aluminum foil 21a and the butyl layer 21b along the cut line 30. Therefore, when the polymeric material 20 is viewed from the aluminum foil 21a side, the small hole perforation 33 and the large hole perforation 29 are visible as shown in FIG. 3, but when viewed from the release paper 21c side, only the small hole perforation 33 is visible. Note that the large hole forming portion 26 is difficult to cut only the aluminum foil 21a of the polymeric material 20, and a part of the butyl layer 21b is also slightly cut, but this does not affect the sound insulation. In addition, the large hole perforation 29 and the small hole perforation 33 are formed by cutting and do not have a significant groove width, and the groove of the perforation is normally closed, so sound leakage is prevented.

[0025] As shown in FIG. 4(b), in this embodiment, the length p1 of the uncut joint between the cuts of the large hole perforation 29 is set to 3 mm, and the length p2 of the uncut joint between the cuts of the small hole perforation 33 is set to 1.5 mm. That is, the large hole perforation 29 is coarser than the small hole perforation 33, and the interval between adjacent cuts is wider and the pitch is larger. The pitches of the large hole perforation 29 and the small hole perforation 33 are not limited to these lengths, and may be set to an optimal length in consideration of the ease of cutting related to the thickness, material, etc. of the sheet material 21. Also, if the cut depths of both perforations are different, the pitches of both perforations may be the same.

[0026] The small hole perforations 33 penetrate the polymeric material 20 in the thickness direction, and the pitch of the perforations is finer than the large hole perforations 29, so they are easier to break than the large hole forming portion 26. For this reason, it is also possible to break them by pressing the inside of the small hole forming portion 32 with the tip of the cable 41. On the other hand, the large hole perforations 29 do not penetrate the polymeric material 20 in the thickness direction, and only cut into a part of the thickness of the butyl layer 21b, so they are cut using scissors or the like.

[0027] The through-hole 35 is formed to have an area slightly smaller than the outer diameter of the cable 41, and due to the adhesiveness of the butyl layer 21b, the inner peripheral surface of the through-hole 35 easily adheres to the periphery of the cable 41 after the cable 41 is passed through from the tip, and a gap is unlikely to occur between the outer surface of the cable 41 and the through-hole 35. From the viewpoint of sound insulation, it is desirable that the through-hole 35 is formed to be slightly smaller than the outer shape of the cable 41, but this is not necessarily limited to this.

[0028] Next, a procedure for covering the peripheral wall 11 of the wiring box 10 configured as described above with the polymeric material 20, attaching the wiring box device 1 to the wall surface 51, and installing the wiring fixture will be described. First, a case will be described in which the electric conduit 40 is connected directly or via a connecting member to the through hole 15 in the side wall 13 of the wiring box 10, and then the cable 41 is inserted into the electric conduit 40.

[0029] 5, scissors are inserted and cut along the large hole perforations 29 of the large hole forming portion 26 of the polymeric material 20 to form a generally U-shaped gap 31 for connecting the conduit 40 or attaching a connecting member. At this time, if the conduit 40 has a relatively large outer diameter, it is cut along the large hole perforations 29 of the first large hole forming portion 26a to form the gap 31. On the other hand, if the conduit 40 has a relatively small outer diameter, it is cut along the large hole perforations 29 of the second large hole forming portion 26b to form the gap 31.

[0030] Next, the outer surface of the wiring box 10 is covered with the polymeric material 20. To do this, the release paper 21c of the polymeric material 20 is peeled off, and the back surface of the bottom wall overlapping portion 22, that is, the surface on the release paper 21c side, is placed and attached to the outer surface of the bottom wall 12 of the wiring box 10, as shown in Fig. 6(a). Then, each side wall overlapping portion 23 is folded along the folding lines 25 and attached to the side wall 13 of the wiring box 10. Thereafter, the extension portion 24 is folded and attached overlapping on the side wall overlapping portion 23. The state in which the overlapping portion 20 is overlapped over the entire outer surface of the wiring box 10 is shown in Fig. 6(b).

[0031] 7, the abutment portion 19 of the left side wall 13c of the wiring box 10 is abutted against a pillar 52 behind the wall, and a fixing screw is inserted into the insertion hole 18 and then forcibly inserted through the left surface overlapping portion 23c of the polymerization material 20, and screwed into the pillar 52. As a result, the wiring box 10 is fixed to the pillar 52.

[0032] Next, the extension 24 is turned up slightly, and the conduit 40 is passed through the opening of the open end of the gap 31 formed in the upper surface overlapping portion 23a of the polymerized material 20 while sliding it horizontally, and is connected to the through hole 15 as shown in FIG. 8(a). After the connection, if a part of the extension 24 of the polymerized material 30 interferes with the outer surface of the conduit 40, the interfering part is overlapped with the outer surface of the conduit 40. If the outer diameter of the conduit 40 is small, it can also be connected to the gap 31 from above. In addition, when the conduit 40 is connected via a connecting member such as a connector, for example, the periphery of the through hole 15 of the side wall 13 of the wiring box is clamped with a bolt and nut of the connecting member (not shown), and the conduit 40 such as a corrugated tube is inserted into the connection port provided on the bolt side to connect. Thereafter, the cable 41 is inserted into the conduit 40, and the end is accommodated in the wiring box 10 (not shown).

[0033] Next, as shown in FIG. 8(b), a wall material 50 is erected on the side of the pillar 52 and the opening 14 of the wiring box 10. After that, although not shown, a magnet detector is used from the surface of the wall to detect the magnet 17a of the detection target 17 of the wiring box 10 attached to the back of the wall, and the position of the wiring box 10 is detected. Then, a through hole is formed in the wall surface 51 using a drilling tool. As a result, the opening 14 of the wiring box 10 is exposed to the surface of the wall through the through hole. Next, the detection target 17 is cut and removed from the base end side, and screws are inserted into mounting holes provided at the upper and lower ends of the device mounting frame to which the wiring device is attached, and screwed into the screw holes of the boss portions 16 at both the upper and lower ends of the wiring box 10. Then, a decorative plate is attached from the front side of the device mounting frame. This completes the installation of the wiring box device 1 to the wall surface 51 and the installation of the wiring device when connecting the electric conduit 40.

[0034] Next, a case will be described where the cable 41 is directly inserted into the through hole 15 of the wiring box 10 without connecting the electric conduit 40 to the through hole 15. First, as shown in Fig. 9, the inside of the small hole forming part 32 of the polymeric material 20 is pressed with the tip of the cable 41 or the tip of a tool such as a screwdriver, and the polymeric material 20 is broken along the small hole perforation 33 to form the through part 35.

[0035] Next, the outer surface of the wiring box 10 is covered with the polymeric material 20. The through-hole portion 35 of the small hole forming portion 32 may be formed after the polymeric material 20 is attached to the wiring box 10. Next, as shown in Fig. 10, the wiring box 10 is fixed to a pillar 52. Then, as shown in Fig. 11, the cable 41 is inserted through the through-hole portion 35 of the small hole forming portion 32 of the polymeric material 20 and the through-hole 15 of the wiring box 10.

[0036] Thereafter, in the same manner as in the previously described case where the conduit 40 is connected directly or via a connecting member to the through hole 15 of the wiring box 10, the wall material 50 is erected on the side of the pillar 52 and the opening 14 of the wiring box 10, and a magnet detector is used to detect the position of the wiring box 10 from the wall surface, and a through hole is formed in the wall surface 51. Then, the device mounting frame and decorative plate with the wiring device attached are attached from the wall surface. This completes the installation of the wiring box device 1 on the wall surface 51 and the wiring device installation work when the cable 41 is directly inserted through the through hole 15.

[0037] In addition, the polymer material 20 in the above embodiment is overlapped on the peripheral wall 11 of the wiring box 10, but it can also be regarded as an outer skin material that covers the wiring box 10 from the outside.

[0038] Next, the operation of the wiring box apparatus 1 of this embodiment will be described. The polymeric material 20 overlaid on the peripheral wall 11 of the wiring box 10 is made of a three-layer sheet material 21 consisting of an aluminum foil 21a, a butyl layer 21b, and a release paper 21c, and the butyl layer 21b is thick and the aluminum foil 21a has a function of damping the butyl layer 21b, so that it has sound-proofing performance and prevents noise and static electricity from propagating between the inside and outside of the wall surface 51 through the wiring box 10 attached to the wall surface 51.

[0039] In particular, the wiring box device 1 is provided with a large hole forming portion 26 and a small hole forming portion 32 having an area smaller than that of the large hole forming portion 26 inside the contour of the large hole forming portion 26 at a portion of the polymeric material 20 that overlaps with the through hole 15 of the wiring box 10 and has the same thickness. This makes it possible to form a gap 31 through which the electric conduit 40 is inserted by removing the inside of the large hole forming portion 26, and to form a through portion 35 through which the cable 41 is inserted by removing the inside of the small hole forming portion 32. As a result, the cable 41 and the electric conduit 40 can be inserted and connected through openings corresponding to the difference in their thicknesses, and therefore no gap is generated between the cable 41 and the through portion 35 of the polymeric material 20, thereby enhancing the effect of preventing noise and noise from propagating between the inside and outside of the wall surface 51 through the wiring box 10.

[0040] Furthermore, the small hole perforations 33 of the small hole forming portion 32 are finer than the large hole perforations 29 of the large hole forming portion 26, and the amount of cut in the thickness direction is greater, so that the small hole forming portion 32 is easier to break than the large hole forming portion 26. As a result, the inside of the small hole forming portion 32 can be pressed and cut with the tip of the cable 41 or a tool, and at that time, it is possible to avoid cutting off the large hole forming portion 26 as well. Therefore, it is not necessary to cut the small hole perforations 33 using scissors or the like. However, it may be cut with scissors or the like.

[0041] Incidentally, the polymeric material 20 in the above embodiment is made of a three-layered sheet material 21 consisting of an aluminum foil 21a, a butyl layer 21b, and a release paper 21c, but the materials of each layer are not limited to these. The number of layers does not have to be three, and may be two, four or more. In addition, although the polymeric material 20 is made of laminated sheet materials, it may be made of a single layer depending on the application. Furthermore, although the laminated sheet material 21 is formed in a substantially cross-shaped strip shape, it is not limited to this shape.

[0042] In addition, the polymeric material 20 is designed so that the small hole perforations 33 are easier to break than the large hole perforations 29 due to the coarseness of the perforations, the size of the pitch of the cuts, and the amount of cut in the thickness direction. However, as shown in Figure 12, multiple layers are stacked in the thickness direction, three layers in Figure 12, and the small hole perforations 33 may be made easier to break by having a greater number of layers cut into them than the large hole perforations 29.

[0043] In addition, although the polymeric material 20 is formed to have a uniform thickness over the entire surface, the thickness may be varied between the bottom wall overlapping portion 22 and each side wall overlapping portion 23 or at different locations.

[0044] Further, although the polymer material 20 is superposed on the outer surface of the peripheral wall 11 of the wiring box 10, it may be superposed from the inside of the peripheral wall 11.

[0045] Furthermore, the polymeric material 20 is made of a single sheet material 21 and is formed into a box-like shape by folding it along folding lines 25, but it may also be formed into a box-like shape from the beginning using a synthetic resin material such as polystyrene foam.

[0046] Next, in the above embodiment, the gap 31 formed by removing the large hole forming portion 26 is formed in a substantially U-shape, and the through portion 35 formed by breaking the small hole forming portion 32 is formed in a substantially elliptical shape, but the shapes of the gap 31 and the through portion 35 are not limited to these, and they may be formed in, for example, a circular shape in accordance with the outer shapes of the electric conduit 40 and the cable 41. When the gap 31 is circular, the electric conduit 40 is inserted and connected into the gap 31 from a direction perpendicular to the opening surface.

[0047] In addition, the small hole forming portion 32 is entirely disposed inside the outline of the large hole forming portion 26, but only a portion of it may be disposed inside the outline of the large hole forming portion 26. Also, the small hole perforation 33 does not necessarily have to penetrate the polymeric material 20 in the thickness direction, so long as the cut is deeper than the large hole perforation 29.

[0048] Furthermore, only one small hole forming portion 32 is disposed inside the outline of one large hole forming portion 26, but a plurality, such as two, may be disposed within one large hole forming portion 26. Also, two small hole forming portions 32 are formed in each of the upper surface overlapping portion 23a and the lower surface overlapping portion 23b in accordance with the through holes 15 provided in the side wall 13 of the wiring box 10, and the size and shape of the two small hole forming portions 32 may be the same or different from each other.

[0049] The polymer material 20 in the above embodiment is for sound insulation, but the use is not limited thereto, and may be used for other purposes such as heat insulation, fire resistance, heat resistance, moisture prevention, waterproofing, etc., in which case, a material, thickness, laminated structure, etc. suitable for those uses are adopted for the polymer material 20. Furthermore, the layer of the sheet material 21 of the polymer material 20 does not have to have such a specific purpose, and may simply be a connecting layer for connecting the polymerized layers.

[0050] In addition, the indicator 27, which is the outline of the large hole forming portion 26 in the above embodiment, is formed by the large hole cutout 28, and further, the large hole cutout 28 is formed by the large hole perforation 29, but the indicator 27 and the large hole cutout 28 are not limited to this. That is, the large hole cutout 28 may be formed by something other than the large hole perforation 29, for example, it may be formed by an engraving or a continuous V-shaped cut groove. Furthermore, the indicator 27 may be a line printed on the surface of the polymer material 20, or may be formed by a difference in color, such as by filling in the bottom wall polymerization portion 22, which is, for example, the inner range of the polymer material 20. In addition, the small hole forming portion 32 is formed by the small hole perforation 33, but it may be formed by something other than this, for example, a continuous V-shaped cut groove with a deep cut.

[0051] Incidentally, although the wiring box 10 in the above embodiment is formed in a square box shape and fixed to a pillar 52 behind the wall with fixing screws, the present invention is similarly applicable to a box formed in another shape, such as a circular box shape, or a type that is not a pillar 52 behind the wall but has a bolt attached to a groove in a side wall 13 (not shown) and a clamping piece attached to the end of the bolt on the back side of the wall, and the bolt is screwed in from the surface of the wall and the clamping piece is moved to the surface of the wall to clamp and fix the wall surface 51. [Explanation of symbols]

[0052] 1: wiring box device, 10: wiring box, 11: peripheral wall, 12: bottom wall, 13: side wall, 15: through hole, 20: polymeric material, 21: sheet material, 26: large hole forming portion, 27: display portion, 28: cutout portion for large hole, 29: perforation for large hole, 31: gap, 32: small hole forming portion, 33: perforation for small hole, 35: penetration portion, 40: electric conduit, 41: cable.

Claims

1. a wiring box having a bottomed box shape with an opening on a front side and a peripheral wall including a bottom wall and a side wall extending from a peripheral edge of the bottom wall, the peripheral wall being capable of connecting a conduit directly or via a connecting member, and having a through hole through which a cable passes; a polymeric material that is laminated on the peripheral wall of the wiring box; In the polymer material, a portion overlapping the through hole and having the same thickness is provided with a large hole forming portion that forms a gap for directly connecting the electric conduit to the through hole or for attaching the connecting member by removing an inside of the outline displayed by a display portion; a small hole forming portion that is partially or entirely disposed inside the outline of the large hole forming portion and forms a through-hole having an area smaller than that of the large hole forming portion; The outline of the small hole forming portion is bordered by a small hole perforation cut in the thickness direction so that it is easier to break than the display portion, and the wiring box device is characterized in that the through portion is formed by breaking along the small hole perforation and removing the inside.

2. 2. The wiring box apparatus according to claim 1, wherein the display portion is formed by a large-hole perforation cut in a thickness direction, the large-hole perforation being coarser than the small-hole perforation.

3. 2. The wiring box device according to claim 1, wherein the indication portion is formed by a large hole perforation cut with a smaller cut amount in the thickness direction than the small hole perforation.

4. The wiring box device according to claim 1, characterized in that the indication portion is formed by a line or a difference in color applied to the surface of the polymeric material, or by a linear engraving or groove recessed from the surrounding area.

5. The polymeric material has a plurality of layers laminated in a thickness direction, The indication portion is formed by a large hole cut portion cut in the thickness direction, 4. The wiring box apparatus according to claim 1, wherein the small hole perforations have a greater number of cut layers than the display portion.

6. 6. The wiring box apparatus according to claim 5, wherein the polymeric material covers the wiring box from the outside and is adhesively fixed to the outer surface of the peripheral wall.

7. A cover material for covering from the outside a wiring box having a bottomed box shape with an opening on a front surface formed by a peripheral wall including a bottom wall and a side wall extending upright from a peripheral edge of the bottom wall, the wiring box having a through hole penetrating the peripheral wall, In the portion overlapping the through hole and having the same thickness, a large hole forming section whose outline is displayed by a display section; a small hole forming portion that is partially or entirely disposed inside the outline of the large hole forming portion and forms a through-hole having an area smaller than that of the large hole forming portion; The contour of the small hole forming portion is bordered by a small hole perforation cut in the thickness direction so that it is easier to break than the display portion, and the penetration portion is formed by breaking along the small hole perforation and removing the inside.

8. 8. The outer covering material according to claim 7, which is made of a sheet material having a uniform thickness and is folded to form a box-shaped body that is superimposed on the peripheral wall.

9. 9. The covering material according to claim 7 or 8, characterized in that the small hole perforation penetrates through the thickness direction, and the display portion consists of a large hole perforation cut into a portion of the thickness direction.

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