Box cover and wiring box device

Abstract

To provide a box cover which can be assembled while coping even with a large-sized wiring box and can cope even with such a narrow space where a large-sized wiring box cannot be disposed.SOLUTION: A box cover 10 includes: a closing part 11 which has a peripheral wall 52 surrounding an internal space, is assembled to a wiring box 50 with an opening formed therein and covers the opening, and in a part of which a through hole 12 communicating the internal space with the outside is formed in a penetration manner; an accessory attaching part 14 to which a wiring accessory is attached to be positioned inside the through hole 12; and a fixing part 41 capable of being fixed to a structure. The closing part 11 forms a facilitation part 17, between one edge 16 positioned apart from the through hole 12 and the through hole 12, to facilitate bending and cutting to shorten the length from the through hole 12 to the one edge 16. Thus, the box cover 10 can be miniaturized and the box cover 10 and the wiring box device 1 can be installed even in a narrow space.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a box cover and a wiring box device for installing wiring devices such as switches and outlets on the wall surfaces of building wall materials, residential equipment, furniture, etc. [Background technology]

[0002] Wiring devices such as lighting fixture switches and outlets are installed on the walls of building partitions, bathroom vanities, office automation desks, etc., and Patent Document 1 discloses a box cover for installing such devices. As shown in Fig. 14(a), this box cover has a main body 91 to which the wiring devices are attached and a fixing part 92 that fixes the main body 91 to a pillar or furring strip of a building structure, and as shown in Fig. 14(b), it is attached to a wiring box 50 and covers the opening of the wiring box 50. The box cover 90 has a through-hole 93 formed in the main body 91 to which the wiring devices are attached, and a wiring device mounting frame that holds the wiring devices is attached to a mounting part 94 provided on a protruding piece of the through-hole 93, so that the wiring devices can be installed.

[0003] When using this box cover 90 to install a wiring device in a wall material, the box cover 90 is attached to a pillar or furring strip 61, the cable 70 is pulled into the inside of the wiring box 50, the cable 70 is pulled out to the front side of the wall through a through hole formed in the wall material, and after connecting to the wiring device, the excess length of the pulled-out cable 70 is pushed back to the back side of the wall, and the wiring device is attached to the through hole 93 via the wiring device mounting frame. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2022-14760 Summary of the Invention [Problem to be solved by the invention]

[0005] However, if the interior space of the wiring box 50 attached to the conventional box cover 90 is narrow, when installing a wiring device in a wall material, it can be difficult and time-consuming to accommodate the excess cable 70, which is pulled out through the wall hole to the surface of the wall and then pushed back into the interior space of the wiring box 50. Therefore, it is possible to consider using a larger wiring box 50 with a larger interior space instead of this wiring box. However, in this case, it may be impossible to install the large wiring box 50 due to the limited installation space around it, or it may be impossible to assemble the box cover 90 because the screws used to assemble the box cover 90 and the wiring box 50 are attached in different positions. Furthermore, this box cover 90 cannot cover the entire opening of the large wiring box 50. Therefore, it becomes necessary to prepare a separate box cover 90 that corresponds to the large wiring box 50. Furthermore, if a large box cover 90 is used to fit both large and small wiring boxes 50, it may not be possible to install it in a location with limited installation space.

[0006] Therefore, the present invention aims to provide a box cover and wiring box device that can be assembled to a large wiring box that can secure storage space for excess cable length, and that can also be used in narrow spaces where a large wiring box cannot be placed. [Means for solving the problem]

[0007] The box cover of claim 1 is used by being attached to a wiring box having a peripheral wall surrounding an internal space and an opening formed on at least one end of the peripheral wall that exposes the interior to the outside, or by being used alone, The wiring device has a closing portion having a through-hole formed therethrough, and a device attachment portion to which a wiring device is attached so as to be positioned within the through-hole, The blocking portion has an easy portion formed between the through hole and one edge located away from the through hole, which makes it easy to bend or cut to shorten the length from the through hole to the one edge. This allows the closing portion to be reduced in size by folding or removing the easy portion, and the box cover and wiring box device can be installed even in narrow spaces.

[0008] In the box cover of claim 2, the easy portion has a through groove that extends linearly through the closing portion. This allows the easy portion to be easily formed with a simple configuration. The box cover of claim 3 is particularly provided with through holes on both sides of the through groove, into which the tip of a screwdriver can be inserted. This makes it easier to perform the bending operation at the easy portion.

[0009] In the box cover of claim 4, a fixing portion for fixing to a structure is provided on the opposite side of the closing portion from the first edge relative to the easy portion. This allows the box cover to be used alone.

[0010] The box cover of claim 5 is particularly provided with a fastening portion between the easy portion and one edge of the closing portion, through which a fastener that penetrates the closing portion and is driven into a structure passes. This allows the closing portion to be folded to form a fixing portion that can be fixed to a structure, and the box cover can also be used alone.

[0011] The wiring box device of claim 6 is a wiring box having a peripheral wall surrounding an internal space, and an opening that exposes the interior to the outside formed on at least one end side of the peripheral wall, wherein the opening is a relatively large wiring box and a relatively small wiring box; and a box cover according to any one of claims 1 to 3, The closing portion of the box cover is large enough to cover the entire opening of the large wiring box, and the size of the closing portion on the side opposite the first edge from the easy portion is formed to be large enough to cover the entire opening of the small wiring box. This allows the box cover to be attached to wiring boxes of different sizes.

[0012] The wiring box device of claim 7, in particular, when assembled to the small wiring box in a state where it is bent along the easy portion, is positioned outside the peripheral wall of the small wiring box on the side of the first edge relative to the easy portion. This prevents the internal space of the wiring box from becoming narrower because the side of the edge of the closing portion closer to the first edge than the easy portion is located inside the peripheral wall of the small wiring box.

[0013] The wiring box device of claim 8 comprises: a wiring box having a peripheral wall surrounding an internal space, and an opening formed on at least one end side of the peripheral wall, which exposes the interior to the outside; a box cover having a plate-shaped main body with a through hole formed therethrough, the box cover having an attachment portion to which a wiring attachment is attached so as to be positioned within the through hole, and an assembly portion to be assembled to one end side of the wiring box; It consists of the main body has an area smaller than the opening of the wiring box, and overlaps only a portion of the opening when assembled to the wiring box; The portion of the opening that does not overlap with the main body overlaps with a cover portion that is connected to the main body by an easy portion that makes it easy to bend or cut. Since the box cover has a fixing portion, it is possible to choose between installing the box cover alone without the wiring box or with the wiring box. Therefore, by using the box cover alone, even in a narrow space where a wiring box would not fit, the installation space becomes larger because there is no wiring box, and by bending or cutting the closing portion, it is possible to install the box cover and install wiring devices in a narrow space such as behind a wall. [Effects of the Invention]

[0014] The present invention allows the box cover to be attached to a large wiring box that can secure storage space for excess cable, so that excess cable can be smoothly stored in the internal space of the wiring box when installing a wiring device. Furthermore, the closing section has an easy-to-bend or cut portion, so the length of the box cover can be shortened by bending or cutting the closing section. This allows the box cover and wiring box device to be installed even in narrow spaces where a large wiring box cannot be installed. [Brief explanation of the drawings]

[0015] [Figure 1] 1A and 1B show a wiring box device according to an embodiment of the present invention, in which FIG. 1A is a perspective view and FIG. 1B is a side view. [Figure 2] FIG. 2 is a perspective view showing the box cover of FIG. [Figure 3] 3A and 3B show the box cover of FIG. 2, in which FIG. 3A is a plan view and FIG. 3B is a front view. [Figure 4] 2A and 2B show the wiring box of FIG. 1, in which FIG. 2A is a perspective view of a large wiring box and FIG. 2B is a perspective view of a small wiring box. [Figure 5] 3 is a perspective view showing a state in which the box cover of FIG. 2 is folded at an easy portion. FIG. [Figure 6] 3A and 3B are perspective views showing the box cover of FIG. 2 fixed to a structure, in which FIG. 3A is a perspective view showing the box cover fixed to the furring strip of a building, and FIG. 3B is a perspective view showing the box cover fixed to a pillar of a building. [Figure 7] 3(b) is a front view further illustrating an assembly portion formed on the box cover of FIG. [Figure 8] 4(b) is a front view illustrating a procedure for assembling the box cover of FIG. 2 to the wiring box of FIG. 4(a). [Figure 9] 4(b) is a cross-sectional view for explaining the procedure for assembling the box cover of FIG. 2 to the wiring box of FIG. 4(a). [Figure 10] 6A and 6B show a state in which the box cover of FIG. 5 is assembled to a small wiring box, in which (a) is a perspective view and (b) is a side view. [Figure 11]2 is a cross-sectional view showing the state in which the wiring box device of FIG. 1 is installed on a furring strip and a wiring fixture is attached to a wall material. [Figure 12] This shows a box cover different from that shown in Figure 2, in which the fixing part is provided in the covering part, (a) is a perspective view showing the state in which it is folded at the easy part, and (b) is a perspective view showing the state in which a small wiring box is assembled to the box cover of (a) and fixed to the framing of a building. [Figure 13] FIG. 3 is a perspective view showing a box cover that is still different from that shown in FIG. 2. [Figure 14] FIG. 10 is a perspective view showing a conventional box cover. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, a box cover and a wiring box device according to an embodiment of the present invention will be described with reference to the drawings. In Fig. 1, the wiring box device 1 is for installing wiring devices 71 such as switches and outlets on a wall material 63 or the like, and is composed of a box cover 10 and a wiring box 50. As will be described later, the wiring device 71 can also be installed by installing and attaching only the box cover 10 to a structure without using the wiring box 50. In the following description, the up-down direction refers to the up-down direction in Fig. 1.

[0017] As shown in FIG. 4 , the wiring box 50 is a rectangular box with a bottom, including a bottom wall 51, a peripheral wall 52 extending from the bottom wall 51 and enclosing an internal space 54, and an opening 53 at the distal end of the peripheral wall 52, exposing the interior to the outside. The bottom wall 51 and the peripheral wall 52 are provided with cable insertion holes 55 formed by punching. Four protruding pieces 56 are formed at the periphery of the opening 53 of the wiring box 50, facing each other in the vertical direction and projecting inward on the same plane as the opening 53. Each protruding piece 56 has a central threaded portion 57 for receiving a screw 81, which serves as a fastener 80. The threaded portion 57 is a female-threaded attachment hole. As shown in FIG. 11 , the internal space 54 of the wiring box 50 accommodates the excess length 70a of the cable 70, which is inserted into the internal space 54 behind a wall, pulled out of the opening 53 to the outside of the wall, connected to a wiring fixture 71, and then pushed back into the internal space 54.

[0018] In this embodiment, a large wiring box 50A having a relatively large area of ​​the opening 53 and a relatively large internal space 54 and a small wiring box 50B are exemplified. Here, both wiring boxes 50 have the same horizontal width dimension but different vertical dimensions, and accordingly, the spacing between a pair of left and right screw portions 57, 57 at the upper and lower ends of the opening 53 is the same, but the spacing between a pair of upper and lower screw portions 57, 57 at the left and right ends of the opening 53 is different.

[0019] Next, as shown in FIGS. 2 and 3, the box cover 10 includes a rectangular plate-shaped closing portion 11 and a fixing portion 41 that can be fixed to a structure 60.

[0020] The blocking portion 11 is formed to have the same size and shape as the opening 53 of the large wiring box 50A, and covers the entire opening 53 of the wiring box 50. A through-hole 12 that connects the internal space 54 of the wiring box 50 with the outside is formed through the upper part of the blocking portion 11 at a position slightly spaced from the upper edge 11a. The through-hole 12 is a horizontally elongated rectangular opening having a wide side that is relatively wide on the inside and a narrow side that is relatively narrow on the inside in a direction perpendicular to the width direction of the inside of the wide side, and is formed parallel to the upper edge 11a of the blocking portion 11.

[0021] Each end of the through-hole 12 on its wide side is formed with a protruding piece 13 that protrudes into the through-hole 12, and the protruding piece 13 is provided with an appliance mounting portion 14. The appliance mounting portion 14 is formed with a female thread portion 15 to which a screw 81 is attached for attaching a wiring appliance mounting frame 72 that holds a wiring appliance 71, as shown in FIG. 11 . The wiring appliance mounting frame 72 generally has a rectangular plate shape, a holding space for holding the wiring appliance 71 is formed in the center, and screw insertion holes for inserting the screws 81 are formed at the widthwise middle positions of both longitudinal ends. Two female thread portions 15 are formed in each appliance mounting portion 14, slightly spaced apart horizontally, and the spacing between the female thread portions 15, 15 on both left and right sides of the through-hole 12 is formed at two different pitches, long and short, corresponding to the pitch of the pair of screw insertion holes at both longitudinal ends of the wiring appliance mounting frame 72. The through-hole 12 is designed so that a plurality of wiring appliances 71 can be installed side by side by attaching the wiring appliance mounting frame 72. The through-hole 12 may be one in which only one wiring fixture 71 can be attached.

[0022] In the closing portion 11, an easy portion 17 is formed between the lower side 11b, which is the edge 16 of the closing portion 11 located away from the through-hole 12, and the through-hole 12, to facilitate bending or cutting in order to shorten the length from the through-hole 12 to the edge 16 of the closing portion 11. The easy portion 17 is formed by a through groove 18 that extends linearly along the width direction of the inner side of the wider side of the through-hole 12. It can also be said that the easy portion 17 extends along the opposing direction of the opposing instrument attachment portions 14. Cutouts 19 cut from the outer edge are formed at both ends of the through groove 18 of the easy portion 17 in the direction in which it extends, and these cutouts 19 also constitute the easy portion 17.

[0023] The blocking portion 11, on the side opposite the edge 16 of the easy portion 17 from the first edge 16, i.e., the upper portion of the easy portion 17 in Figures 2 and 3, is formed to a size that covers the entire opening 53 of the small wiring box 50B. The upper portion of the easy portion 17 constitutes the main body in the claims, and the lower portion constitutes the covering portion in the claims. That is, the blocking portion 11 is composed of a main body 20 and a covering portion 21. In other words, the main body 20 of the blocking portion 11 has a smaller area than the opening 53 of the large wiring box 50A, and overlaps only a portion of the opening 53 when assembled to the large wiring box 50A. Furthermore, the covering portion 21, which is connected to the main body 20 by the easy portion 17, overlaps the portion of the opening 53 of the large wiring box 50A that does not overlap with the main body 20.

[0024] Fig. 5 shows the state in which the closing portion 11 of the box cover 10 is folded at the easy portion 17. In Fig. 5, the portion below the easy portion 17 is folded toward the back surface of the main body 20, which is the same side as the fixing flange 40 described below. However, depending on the space around the location where the box cover 10 is to be installed, the portion below the easy portion 17 may also be folded toward the front surface of the main body 20, which is the opposite side to the fixing flange 40.

[0025] A pair of upper assembly portions 22 each consisting of an oval hole are provided at the left and right corners of the upper end of the main body 20. The upper assembly portion 22 also serves as a large / small box assembly portion 23 to which the upper portion of the box cover 10 is attached by inserting a screw 81 and attaching it to a pair of left and right threaded portions 57, 57 on the upper sides of the large and small wiring boxes 50. Furthermore, at the upper end of the main body 20, a plurality of fixing portions 24 (four in this embodiment) each consisting of an insertion hole through which the screw 81 is inserted are horizontally provided between the pair of left and right upper assembly portions 22, 22. An annular flat-shaped flat portion 25 is formed at both left and right ends of the upper part of the main body 20 by bending it in a direction perpendicular to the plane of the main body 20. A cable 70 is inserted through a circular hole 26 in the center of the flat portion 25. The flat portion 25 is not necessarily required.

[0026] At both the left and right ends of the closing portion 11, on both sides in the vertical direction sandwiching the easy portion 17, there are provided through-holes 27 into which the tip of a screwdriver tool can be inserted. Furthermore, a pair of lower assembly portions 28 consisting of circular holes are provided diagonally downward from the through-holes 27 provided on the main body 20 side and communicate with the through-holes 27. The lower assembly portions 28 also serve as small-box assembly portions 29 to which the lower side of the box cover 10 is attached by inserting screws 81 and attaching them to the threaded portions 57 on the lower side of the small wiring box 50B.

[0027] A pair of lower assembly parts 30 consisting of elongated notched holes opening below the edge 16 of the cover part 21 of the blocking part 11 are provided at the left and right corners of the lower end of the cover part 21. The lower assembly parts 30 also serve as large box assembly parts 31 to which the lower side of the box cover 10 is assembled by inserting screws 81 and attaching them to a pair of left and right threaded portions 57, 57 on the underside of the large wiring box 50A.

[0028] Furthermore, in the vertically intermediate portion of the covering portion 21, a plurality of fastening portions 32 (four in this embodiment) are provided horizontally, each consisting of a pilot hole through which a fastener 80 such as a nail or screw 81 passes to be driven through the closing portion 11 and into the structure 60. These fastening portions 32 also serve as fixing portions 33 that fix the box cover 10 to the structure 60 by bending the covering portion 21 of the closing portion 11 at the easy portion 17 in a direction perpendicular to the main body 20 to form an abutment surface that abuts against the structure 60. Note that the fixing portions 32 may be fixing portions that are fixed to the structure in the claims, or may be fixing portions that are formed separately from the fixing portions in the claims.

[0029] Next, fixing flanges 40 are formed at two ends of the upper side 11a of the closing portion 11, and are bent perpendicular to the closing portion 11. The end sides of each fixing flange 40 are provided with fixing portions 41 each having a long hole through which a screw 81 is inserted to fix the fixing portion 41 to the structure 60. Furthermore, a weak portion 42 is formed in each of the portions slightly inwardly between the fixing portions 41 to be plastically deformed and bent. The weak portion 42 is formed as a long-hole-shaped groove extending in a direction perpendicular to the upper side 11a of the main body 20 of the closing portion 11. The portion of each fixing flange 40 closer to the fixing portion 41 than the weak portion 42 can be bent at the weak portion 42 in a direction perpendicular to the plane of the fixing flange 40.

[0030] Here, as described above, the fixing portion in the claims includes not only the fixing portion 41 formed in advance on the fixing flange 40, but also the fixing portion 33 consisting of the fixing portion 32 which is used after folding the covering portion 21 of the blocking portion 11 at the easy portion 17.

[0031] The box cover 10 configured as described above can be attached by, for example, attaching screws 81 to the two fixing portions 41 while the upper surface of the fixing flange 40 is in contact with the lower surface of the furring strip 61, which is the structure 60, as shown in Figure 6(a). The box cover 10 can also be attached by bending the weak portion 42 of the fixing flange 40 in a direction perpendicular to the plane, and then attaching a screw 81 to the fixing portion 41 with the bent surface of the fixing flange 40 aligned with the pillar 62, which is the structure 60, as shown in Figure 6(b).

[0032] The box cover 10 can be fixed to the structure 60 in the same manner when used after being folded at the easy portion 17. Furthermore, when installing the box cover 10 folded at the easy portion 17 on the furring strip 61 of a building, the box cover 10 can be turned upside down, and the fixing portion 32, which is the fixing portion 33 of the cover portion 21, rather than the fixing portion 41 of the fixing flange 40, can be brought into contact with the underside of the furring strip 61, and the screws 81 can be fastened to the fixing portion 32.

[0033] When these box covers 10 are attached to the structure 60, they are usually fixed so that the closing portion 11 is flush with the side of the furring strip 61 or the adjacent surface of the pillar 62.

[0034] The box cover 10 thus installed on the structure 60 can be used alone, or can be assembled with the wiring box 50 and installed on the structure 60 for use. When using the box cover 10 assembled with the wiring box 50, the box cover 10 and the wiring box 50 can be assembled together and then attached to the structure 60, or the box cover 10 can be fixed to the structure 60 and then assembled to the wiring box 50. Alternatively, the peripheral wall 52 and bottom wall 51 of the wiring box 50 can be fixed to the structure 60, such as a pillar 62 or furring strip 61, using screws 81, and then the box cover 10 can be assembled to the wiring box 50.

[0035] <Assembling the wiring box and box cover> Next, the assembly of the wiring box 50 and the box cover 10 will be described. The box cover 10 attached to the wiring box 50 constitutes the wiring box device 1. Here, a procedure for assembling the box cover 10 to the large wiring box 50A before fixing the box cover 10 to the structure 60 will be described.

[0036] Here, details of each assembly part provided in the closing part 11 of the box cover 10 are shown in Figure 7. In the following description, the first direction side means the upper side in the vertical direction in Figure 7, and the opposite side to the first direction means the lower side. However, the first direction side may also mean the lower side in the vertical direction in Figure 7, and the opposite side to the first direction may also mean the upper side.

[0037] 7, the pair of left and right upper assembly portions 22, 22 and the pair of left and right lower assembly portions 30, 30 of the closing portion 11 of the box cover 10 are provided with a total of four through holes 34 at reference positions corresponding to the screw portions 57 provided at the four corners of the internal space 54 of the wiring box 50. Of the four through holes 34, the through hole 34 of the lower assembly portion 30 has, on the upper side, which is the first direction side, a first extension space 35a formed as an elongated hole that communicates with the through hole 34 and into which the shank of a screw 81 can be placed, and, on the opposite side to the first direction, a reverse extension space 35b formed as an elongated hole that communicates with the through hole 34 and into which the shank of a screw 81 can be placed, thereby forming a bilateral extended through hole 35 that extends both above and below. The reverse extension space 35b of the extension through holes 35 on both sides is cut open in the lower side 11b, which is one edge 16 of the cover part 21, so that the shank of the screw 81 can be placed in the reverse extension space 35b or removed from the reverse extension space 35b, and is connected to the outside, and this cut open hole serves as the first entry / exit part 35c through which the shank of the screw 81 passes.

[0038] Of the four through holes 34, the through hole 34 of the upper assembly part 22 is a round hole formed only on the first direction side with a second extension space 36a that communicates with the through hole 34 and that allows the shank of the screw 81 to be positioned inside, forming a one-sided extended through hole 36 that extends upward. The second extension space 36a is formed as a circular hole that is larger than the through hole 34 so that the shank of the screw 81 can be positioned within or removed from the second extension space 36a, and forms a second entrance / exit part 36b that is a head passage hole through which the head of the screw 81 passes.

[0039] To assemble the box cover 10 having such through holes 34 formed therein to the wiring box 50, first, the screws 81 are loosely and temporarily attached to the four screw portions 57 of the wiring box 50.

[0040] Thereafter, the box cover 10 is assembled to the wiring box 50 in the procedure shown in Figures 8 and 9. Here, Figure 9 is a cross-sectional view taken along the AA cutting line in Figure 8(a), and Figures 9(a) to (d) are in the same state as Figures 8(a) to (d), respectively. First, as shown in Figures 8(a) and 9(a), the two lower screws 81 that are temporarily screwed into the screw portions 57 at the four corners of the internal space of the wiring box 50 are passed through the first entry / exit portion 35c of the two-sided extension through-holes 35, which are the lower assembly portion 30, while pressing down the box cover 10.

[0041] Next, the screw 81 is moved relatively upward within the two-sided extension through-hole 35 until the inner surface of the upper end of the first extension space 35a is hooked onto the screw 81, as shown in FIGS. 8(b) and 9(b). Subsequently, as shown in FIGS. 8(c) and 9(c), the head of the upper screw 81 of the wiring box 50 is passed through the second entrance / exit portion 36b, which is the head-passing hole of the one-sided extension through-hole 36 and which is the upper assembly portion 22. Thereafter, as shown in FIGS. 8(d) and 9(d), the box cover 10 is slid upward until the shank of the upper screw 81 moves downward from the second extension space 36a of the one-sided extension through-hole 36 into the second through-hole 34b. In this state, the lower screw 81 of the wiring box 50 is positioned in the correct position in the first through-hole 34a of the two-sided extension through-hole 35 of the box cover 10, and the upper screw 81 is positioned in the correct position in the second through-hole 34b of the one-sided extension through-hole 36. Then, the screws 81 are fully tightened to fix the box cover 10 in place, thereby completing the assembly of the box cover 10 to the wiring box 50. To release the box cover 10 after assembly, simply follow the above steps in reverse.

[0042] In this way, when the box cover 10 and the wiring box 50 are assembled while sliding them vertically relative to one another, there is an effect that no large gap is created between the upper surface of the wiring box 50 and the fixed flange 40 of the box cover 10. That is, if the wiring box 50 is rotated relative to the box cover 10 below the fixed flange 40 of the box cover 10 around the center of the opening 53 as the rotation axis while the screw 81 provisionally fastened to the threaded portion 57 of the wiring box 50 is inserted into the arc-shaped elongated hole formed in the box cover 10 to assemble the wiring box 50, if the width of the wiring box 50 is large, the tilt of the wiring box 50 associated with the rotation will also be large, causing the corners to interfere with the underside of the fixed flange 40 of the upper box cover 10. For this reason, the box cover 10 needs to have a large gap between the upper assembly portion 22 and the fixed flange 40, which results in a large, unnecessary space being created between the underside of the fixed flange 40 and the upper surface of the wiring box 50 after assembly. However, in the wiring box device 1 of this embodiment, the box cover 10 is assembled by sliding it up and down, so the space between the underside of the fixing flange 40 of the box cover 10 and the upper surface of the wiring box 50 can be reduced.

[0043] Incidentally, the inventions described in the following Supplementary Notes 1 to 6 can also be understood from the manner in which the box cover 10 is assembled in the above embodiment.

[0044] (Appendix 1) A box cover (10) has a fixing portion fixed to a structure (60) and a peripheral wall (52) surrounding an internal space (54), an opening (53) that exposes the interior to the outside is formed on at least one end side of the peripheral wall (52), and the box cover (10) has a closing portion (11) that is assembled to one end side of a rectangular wiring box (50) provided with four screw portions (57) in the internal space (54) and covers at least a part of the opening (53), The box cover 10 has four through holes 34 at reference positions corresponding to the four screw portions 57, and can be assembled by placing it against the opening 53 of the wiring box 50 and screwing four screws 81, the shanks of which pass through the four through holes 34 at the reference positions, into the four screw portions 57, respectively; Any one of one to three of the four through holes 34 is configured as a bilaterally extended through hole 35, in which a first extension space 35a is formed on the first direction side that communicates with the through hole 34 and into which the shank of the screw 81 can be positioned, and a reverse extension space 35b is formed on the opposite side to the first direction that communicates with the through hole 34 and into which the shank of the screw 81 can be positioned, and the reverse extension space 35b of the bilaterally extended through hole 35 has a first entrance / exit portion 35c through which the head or shank of the screw 81 passes to position the shank of the screw 81 within the reverse extension space 35b or to remove it from the reverse extension space 35b, The remaining through holes 34 of the four that are not the bilateral extended through holes 35 are made into one-sided extended through holes 36 having second extended spaces 36a formed only on the first direction side that communicate with the through holes 34 and allow the shanks of the screws 81 to be placed inside, and the second extended spaces 36a have second entrance / exit portions 36b through which the heads or shanks of the screws 81 pass to place the shanks of the screws 81 in or remove them from the second extended spaces 36a. In a state where all of the four screws 81 are loosened and temporarily fastened from a state where the box cover 10 is assembled to the wiring box 50, the box cover 10 can be slid relatively to the wiring box 50 in a direction opposite to the first direction, so that the shanks of all of the screws 81 can be positioned within the first extension space 35a and the second extension space 36a. A box cover characterized in that, when the wiring box 50 is in a temporary screwed state in which the four screws 81 are screwed into the four screwing portions 57, and the screw 81 corresponding to the two-sided extension through-hole 35 is positioned within the first extension space 35a, the head or shaft of the screw 81 corresponding to the one-sided extension through-hole 36 can pass through the second entrance / exit portion 36b.

[0045] This configuration allows the box cover 10 and the wiring box 50 to be assembled without rotating relative to each other. Furthermore, by assembling them with four screws 81, the box cover 10 and the wiring box 50 can be assembled stably and firmly.

[0046] (Appendix 2) The box cover described in Appendix 1 is characterized in that the one-side extended through hole 36 has a regulating portion 36c that abuts against the shank of the screw 81 and regulates the shank of the screw 81 from moving relative to the direction opposite to the first direction, and when the relative position is determined by the regulating portion 36c, the shank of the screw 81 corresponding to the both-side extended through hole 35 is positioned in the both-side extended through hole 35. This makes it easy to set the box cover 10 in the correct assembly position.

[0047] (Appendix 3) The box cover described in Appendix 2 is characterized in that the two-sided extended through holes 35 extend to the edge opposite the first direction, and the first entry / exit portion 35c is formed at the edge, through which the shank of the screw 81 can pass in the direction opposite the first direction. This allows the shank of the screw 81 to move from the first in / out portion 35c to the inside of the through-hole 34 by linear relative movement, which improves workability during assembly. When the present invention is implemented, not only the first entrance / exit portion 35c but also the second entrance / exit portion 36b may extend to the edge.

[0048] (Appendix 4) The box cover according to claim 3, characterized in that it has a fixing portion 41 that can fix the edge in the first direction along the structure 60. According to this, after the edge in the first direction is fixed to the ceiling, the screw 81 temporarily screwed into the screw portion 57 of the wiring box 50 is hooked onto the assembly portion of the box cover 10 to create a temporary assembly state, and then the actual assembly work can be performed.

[0049] (Appendix 5) The four through holes 34 include a first through hole 34a consisting of two of the through holes 34 spaced apart in a direction perpendicular to the first direction, and a second through hole 34b consisting of two of the through holes 34 spaced apart in the first direction from two of the four screw portions 57, A box cover described in any one of Appendix 1 to Appendix 4, characterized in that the first through hole 34a is the two-sided extended through hole 35 and the second through hole 34b is the one-sided extended through hole 36. According to this, since two screws 81 are inserted into each of the first through-holes 34a and the second through-holes 34b, the work of inserting the screws 81 into the through-holes 34 is easy.

[0050] (Appendix 6) Of the first insertion / removal portion 35c and the second insertion / removal portion 36b, at least the second insertion / removal portion 36b is formed with a head passage hole having a size that allows the head of the screw 81 to pass through, A box cover as described in any one of Appendix 1 to Appendix 4, characterized in that the shank of the screw 81 that has passed through the first entry / exit portion 35c and is placed in the first extension space 35a is allowed to pass through the head passage hole by changing the posture of the box cover 10 while the shank of the screw 81 is in contact with the inner surface of the first extension space 35a. According to this, by abutting the screw 81 placed in the through hole 34 having the first inlet / outlet portion 35c against the inner surface, the screw 81 placed in the through hole 34 having the second inlet / outlet portion 36b can be positioned, making the alignment work easier.

[0051] The state in which the box cover 10 is attached to the large wiring box 50A in the above manner is shown in Fig. 1. After the box cover 10 is attached to the wiring box 50, the box cover 10 is fixed to a structure 60.

[0052] The box cover 10 can also be assembled to a small wiring box 50B. In this case, the wiring box 50 is placed on the box cover 10, and as shown in Figure 10, screws 81 are inserted from the front of the box cover 10 through the large / small box assembly section 23 and the small box assembly section 29, and then screwed into the threaded section 57 of the wiring box 50 to assemble it.

[0053] In the above description, the box cover 10 is assembled to the wiring box 50 before the box cover 10 is fixed to the structure 60, but the wiring box 50 can also be placed and assembled to the box cover 10 after the box cover 10 is fixed to the structure 60. In this case, the box cover 10 can be assembled by inserting screws 81 from the front into the upper assembly portion 22 and the lower assembly portion 30 and screwing them into the threaded portions 57 of the large wiring box 50A, or by inserting screws 81 from the front into the upper assembly portion 22 and the lower assembly portion 28 of the box cover 10 and screwing them into the threaded portions 57 of the small wiring box 50B.

[0054] <Installation of wiring devices> Next, a method for installing the wiring fixture 71 on a wall material 63 such as a partition wall using the wiring box device 1 of this embodiment will be described. Here, as shown in Fig. 11, a case where the box cover 10 is fixed to a furring strip 61 of a building will be described. Note that the box cover 10 can also be fixed to a pillar 62 of a building in the same manner.

[0055] First, after assembling the box cover 10 and the wiring box 50 as described above, the box cover 10 is fixed to the furring strip 61. In this state, the box cover 10 is fixed so that the blocking portion 11 is flush with the side surface of the furring strip 61, as shown in FIG.

[0056] Next, the cable 70 is pulled into the wiring box 50. After that, a partition wall, or wall material 63, is erected so as to abut against the front surface of the closing portion 11 of the box cover 10. After the wall material 63 is erected, a wall hole 64 is formed in the wall material 63, and the device attachment portions 14 provided on both sides of the through-hole 12 of the box cover 10 are exposed to the wall surface. Next, the cable 70 is pulled out to the wall surface and connected to the wiring device 71 held in the wiring device mounting frame 72. Then, while pushing the excess length 70a of the cable 70 back toward the back of the wall, the wiring device mounting frame 72 is attached by screwing mounting bolts into the device attachment portions 14 of the box cover 10. Finally, a decorative plate 73 is attached to the front side of the wiring device mounting frame 72. The wiring device 71 thus installed on the wall material 63 is shown in FIG. 11 . After installation, if there are multiple wiring devices 71, they are installed side-by-side.

[0057] <Effect> Next, the operation of the wiring box device 1 and the box cover 10 of this embodiment will be described. The box cover 10 can also be attached to a large wiring box 50A that can secure storage space for the excess length 70a of the cable 70. Therefore, when installing the wiring device 71, the excess length 70a of the cable 70 can be smoothly stored in the internal space 54 of the wiring box 50. Furthermore, because the box cover 10 can be attached to both large and small wiring boxes 50, costs can be reduced and parts management becomes easier.

[0058] Furthermore, the closing portion 11 of the box cover 10 has an easy portion 17 formed between the edge 16 of the box cover 1 and the through-hole 12 to facilitate bending or cutting, thereby shortening the length from the through-hole 12 to the edge 16 of the box cover 1. This allows the box cover 10 to be made smaller, and the box cover 10 and wiring box device 1 to be installed even in narrow spaces where a large wiring box device 1 cannot be installed.

[0059] In addition, in each component, the easy portion 17 of the box cover 10 has a linearly extending through groove 18 that penetrates the closing portion 11, so that the closing portion 11 can be easily bent and cut at the easy portion 17. Furthermore, the closing portion 11 of the box cover 10 is formed with a through hole 27 into which the tip of a screwdriver can be inserted across the through groove 18 of the easy portion 17, making it easy to perform the bending operation at the easy portion 17.

[0060] When the box cover 10 is assembled to the small wiring box 50B in a state where it is bent along the easy portion 17, the side of the edge 16 from the easy portion 17 is located outside the peripheral wall 52 of the small wiring box 50B, so that the internal space of the wiring box 50 can be prevented from being narrowed by being located inside the peripheral wall 52.

[0061] In addition, an assembly section 23 for both large and small boxes and an assembly section 29 for small boxes are formed on both sides of the through hole 12 in the main body 20 in a direction perpendicular to the through groove 18, and an assembly section 31 for large boxes is formed in the cover section 21, and assembly sections are provided at multiple separated locations, so that the box cover 10 can be stably assembled to the wiring box 50.

[0062] <Variations> Incidentally, the box cover 10 in the above embodiment is shown as having a fixing flange 40 at the upper end of the closing portion 11, but it may also be configured not to have a fixing flange 40. In this case, the fixing portion of the box cover 10 is a fixing portion 33 made up of the fixing portion 32 of the covering portion 21 bent so as to be perpendicular to the main body 20 at the easy portion 17 of the closing portion 11, as shown in Figure 12(a). When installing this box cover 10 on the furring strip 61 of a building, as shown in Figure 12 (b), the cover portion 21 is abutted along the underside of the furring strip 61, screws 81 are attached to the fastening portion 32 to secure it to the furring strip 61, and then the small wiring box 50B is assembled to the box cover 10.

[0063] Next, in the above embodiment, the easy portion 17 is formed parallel to the longitudinal direction of the through hole 12, but it may be formed so as to be bent along an imaginary line that intersects with the longitudinal direction inside the through hole 12. In this case, the size of the through hole 12 can also be reduced.

[0064] Furthermore, although the through-holes 12 in the above embodiment are formed as horizontally elongated holes whose longitudinal direction is parallel to the upper side 11a of the blocking portion 11, they may also be formed as vertically elongated holes whose longitudinal direction is perpendicular to the upper side 11a of the blocking portion 11, as shown in Fig. 13. In this case, the box cover 10 can be bent or cut at the easy portion 17 in the same manner as above, and the multiple wiring devices 71 can be arranged vertically in the wall material 63 by, for example, assembling the box cover 10 to the vertically elongated wiring box 50.

[0065] Furthermore, although the easy portion 17 in the above embodiment is formed by the through groove 18, it is not limited to this and may be formed by a thin portion that is thinner than the surrounding area of ​​the easy portion 17. Furthermore, the ease portion 17 does not have to be a continuous through groove 18, but may be a plurality of individual through holes arranged in a straight line. The through groove 18 of the easy portion 17 does not have to be one continuous groove, but may be a plurality of grooves arranged in series in the extending direction. Furthermore, the easy portion 17 may have a plurality of through grooves 18, etc. formed at intervals along the longitudinal direction of the through-hole 12, and the bending or removal position may be selected from a plurality of positions depending on the usage situation.

[0066] In addition, the through holes at each assembly point between the box cover 10 and the wiring box 50 in the above embodiment are formed in the shapes and arrangements shown in Figures 3, 7, etc., but are not limited to these shapes and arrangements.

[0067] In the above embodiment, when assembling the small wiring box 50B to the box cover 10, in order to install the entire wiring box device 1 in a small space and because the blocking portion 11 only needs to cover the opening 53 of the small wiring box 50B, the box cover 10 is installed in a state where it is bent or cut at the easy portion 17. However, if there are no interfering objects in the surrounding space and it does not pose any particular hindrance, it is not necessarily necessary to bend it at the easy portion 17, and it can also be assembled to the small wiring box 50B in a flat state as a whole.

[0068] Furthermore, the closing portion 11 of the box cover 10 is formed in the same shape as the opening 53 of the box, but may be wider in left and right and taller in top and bottom than the opening 53 and may protrude slightly outward from the opening 53.

[0069] It should be noted that the closing portion 11 that has been folded can be unfolded again into a flat state and assembled into the opening 53 of the large wiring box 50A.

[0070] In the wiring box 50 of the above embodiment, the opening 53 is formed on one end side of the peripheral wall 52, but it may be formed on both end sides of the peripheral wall 52.

[0071] In the above embodiment, the wiring device 71 is held by the wiring device mounting frame 72 and indirectly attached to the device mounting portion 14 of the box cover 10, but it can also be attached directly to the device mounting portion 14 without using the wiring device mounting frame 72. [Explanation of symbols]

[0072] 1: wiring box device, 10: box cover, 11: blocking portion, 12: through hole, 14: device attachment portion, 16: edge of 1, 17: easy portion, 18: through groove, 20: main body, 21: covering portion, 27: through hole, 32: fixing portion, 33: fixing portion, 41: fixing portion, 50: wiring box, 50A: large wiring box, 50B: small wiring box, 53: opening, 60: structure, 61: furring strip, 62: pillar, 71: wiring device, 80: fixing body, 81: screw.

Claims

1. A box cover that is used alone or assembled to a wiring box having a peripheral wall that surrounds an internal space and an opening that exposes the interior to the outside on at least one end side of the peripheral wall, The wiring device has a closing portion having a through-hole formed therethrough, and a device attachment portion to which a wiring device is attached so as to be positioned within the through-hole, A box cover characterized in that the closing portion has an easy portion formed between one edge located away from the through hole and the through hole, which makes it easy to bend or cut to shorten the length from the through hole to the one edge.

2. 2. The box cover according to claim 1, wherein the easy portion has a through groove extending linearly through the closing portion.

3. 3. The box cover according to claim 2, wherein through holes into which the tip of a screwdriver can be inserted are provided on both sides of the through groove.

4. A box cover as described in any one of claims 1 to 3, characterized in that a fixing portion for fixing to a structure is provided on the opposite side of the closing portion from the first edge relative to the easy portion.

5. A box cover as described in any one of claims 1 to 3, characterized in that a fastening portion is provided between the easy portion and one edge of the closing portion, through which a fastener that penetrates the closing portion and is driven into a structure passes.

6. a wiring box having a peripheral wall surrounding an internal space and an opening formed on at least one end side of the peripheral wall, the opening allowing the interior to face the outside; a large wiring box having a relatively large opening; and a small wiring box having a relatively small opening; and a box cover according to any one of claims 1 to 3, A wiring box device characterized in that the closing portion of the box cover is sized to cover the entire opening of the large wiring box, and the size of the closing portion on the opposite side of the easy portion from the first edge is formed to cover the entire opening of the small wiring box.

7. The wiring box device according to claim 6, characterized in that when assembled to the small wiring box in a state where it is bent along the easy portion, the side of the first edge relative to the easy portion is positioned outside the peripheral wall of the small wiring box.

8. a wiring box having a peripheral wall surrounding an internal space, the peripheral wall having an opening formed on at least one end side thereof, the opening allowing the interior to be exposed to the outside; a box cover having a plate-shaped main body with a through hole formed therethrough, the box cover having an attachment portion to which a wiring attachment is attached so as to be positioned within the through hole, and an assembly portion to be assembled to one end side of the wiring box; A wiring box device comprising: the main body has an area smaller than the opening of the wiring box and overlaps only a portion of the opening when assembled to the wiring box; A wiring box device characterized in that a portion of the opening that does not overlap with the main body is overlapped with a cover portion connected to the main body by an easy portion that makes it easy to bend or cut.

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