Cover and installation device

Abstract

To provide a cover capable of improving installation work.SOLUTION: A cover accommodates a behind-the-wall installation body fixed to a fixed surface of a structure extending in an extending direction. The cover includes: a bottom wall portion formed on a base end side; a peripheral wall portion erected from the bottom wall portion, extending from the base end side to a tip end side, and internally defining an accommodation space for accommodating the behind-the-wall installation body; an opening portion opened at a tip end of the peripheral wall portion; and an index portion for determining an installation position of the cover in an extending direction with respect to a reference position determined in the extending direction of a fixed surface for installing the behind-the-wall installation body. The index portion indicates a plurality of positions or a range where the installation position of the cover is allowed to be shifted in the extending direction when the cover is positioned with respect to the reference position. When the cover is installed on the fixed surface with the reference position and one of the plurality of positions of the index portion aligned with each other or with the reference position aligned so as to be within the range of the index portion, the behind-the-wall installation body can be aligned with the reference position.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a cover to be installed in a wall hole drilled in a wall of a building, and an installation device including the cover. [Background technology]

[0002] Generally, when wiring devices such as outlets and switches are installed in the walls of a building, a wall hole is formed in the wall, and the wiring is arranged so that it faces the wall surface through the wall, and wiring is arranged in the space behind the wall. In this installation structure, measures are required to completely seal the wall hole used to install the wiring devices in order to prevent sound leakage into the room on the wall surface through the wall hole and to prevent air currents such as cold air and warm air from behind the wall, as well as dust and dirt, from entering the room on the wall surface.

[0003] For example, Patent Document 1 discloses an airtight cover that houses a wiring device and a wiring box installed on the wall of a building. In the following paragraphs, the reference numerals of Patent Document 1 are indicated in parentheses. A wall (W) is composed of a pillar (31) and a pair of wall members (32) erected on both the front and rear sides of the pillar (31). A hollow space (33) is formed between the pair of wall members (32). A wiring box (11) formed in a bottomed rectangular box shape with an opening on one side (surface) is used to install a wiring device (S) on the wall (W). The airtight cover (20) includes a cover body (21) formed in a bottomed box shape with an opening (21a) on one side, capable of housing the wiring device (S) through the opening (21a), and an annular flange portion (26) extending outward from the cover body (21) around the entire periphery of the opening (21a). A method for installing a wiring device (S) on a wall (W) using the airtight cover (20) is as follows. The airtight cover (20) is positioned so that the left rear surface of the flange portion (26) is positioned on the front side of the pillar (31). The wiring box (11) is housed in the cover body (21), and fixing screws are inserted into the screw holes (18) of the wiring box (11) and forcibly screwed into the pillar (31) through the left wall (23d) of the airtight cover (20). This fixes the airtight cover (20) to the pillar (31), and the wiring box (11) is fixed to the pillar (31) while housed within the airtight cover (20). At this time, the wiring box (11) is fixed to the pillar (31) so that it is positioned below the cover body (21). A wall material (32) is erected on the front side of the airtight cover (20) so as to sandwich the pillar (31), thereby constructing a wall (W) and installing the wiring box (11) in a hollow portion (33) within the wall (W). Finally, a through-hole corresponding to the opening of the wiring box 11 is drilled in the wall material 32, the cable 28 is pulled out from the through-hole to the front side of the wall material 32, and the cable 28 is connected to the wiring device S. Thereafter, the wiring device S is held in the wiring device mounting frame and housed in the wiring box 11 inside the airtight cover 20. Furthermore, the wiring device mounting frame is attached to the wiring box 11 using the boss portion 19. As a result, the wiring device S is installed on the wall W. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-050418 Summary of the Invention [Problem to be solved by the invention]

[0005] The airtight cover (cover) of Patent Document 1 is fixed to a fixed surface extending in the direction of extension of a pillar together with a wiring box (wall-mounted body). The front surface of the cover's flange abuts the back surface of the wall, creating an airtight state between the front and back surfaces of the wall, while the wiring box is installed through a wall hole. Generally, when a wiring box in which a wiring device is installed is fixed to a fixed surface, it is required to be accurately installed at a predetermined height (installation position). The airtight cover of Patent Document 1 requires the wiring box to be housed within the airtight cover, and then the airtight cover and wiring box must be fixed to a predetermined position on the fixed surface of the pillar while maintaining the wiring box positioned at the bottom within the airtight cover. In particular, it is extremely difficult to support the airtight cover with one hand, hold the wiring box and the airtight box in a mutually aligned position, and simultaneously fix them to the fixed surface of the pillar without misalignment. In other words, conventional airtight covers have a problem with poor installation workability.

[0006] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a cover that enables improved installation work, and an installation device equipped with the cover. [Means for solving the problem]

[0007] (Configuration 1) The cover of configuration 1 is a cover that accommodates a wall-back installation body that is fixed to a fixed surface of a structure extending in the extension direction, a bottom wall portion formed on the base end side; a peripheral wall portion that stands upright from the bottom wall portion, extends from a base end side to a tip end side, and defines an accommodation space therein for accommodating the wall-back installation body; an opening that opens at a tip of the peripheral wall portion; an indicator portion for determining the installation position of the cover in the extension direction relative to a reference position determined in the extension direction of the fixed surface for installing the wall-back installation body; the indicator portion indicates a plurality of positions or ranges within which the installation position of the cover is allowed to be shifted in the extension direction when the cover is aligned with the reference position, The cover is characterized in that when it is installed on the fixed surface by aligning the reference position with one of the multiple positions of the indicator part, or by aligning the reference position so that it is within the range of the indicator part, the wall-back installation body can be aligned to the reference position.

[0008] (Configuration 2) The cover of configuration 2 is a cover that is installed on a fixed surface of a structure extending in the extension direction and covers a wall hole formed in the wall from the back side of the wall, a peripheral wall portion extending from a base end side to a tip end side; a bottom wall portion formed to close a base end side of the peripheral wall portion and to cover the wall hole from the back side in cooperation with the peripheral wall portion; an opening that opens at a tip of the peripheral wall portion; an indicator portion for determining an installation position of the cover in the extension direction with respect to a reference position determined in the extension direction of the fixed surface for forming the wall hole in the wall, the indicator portion indicates a plurality of positions or ranges within which the installation position of the cover is allowed to be shifted in the extension direction when the cover is aligned with the reference position, When the cover is installed on the fixed surface by aligning the reference position with one of the multiple positions of the indicator portion, or by aligning the reference position so that it is within the range of the indicator portion, the peripheral wall portion and the bottom wall portion can cover the entire wall hole formed in the wall in accordance with the reference position.

[0009] (Configuration 3) The cover of configuration 1 is characterized in that, in the cover of configuration 1 or 2, it further comprises a flange portion that projects outward from a tip of the peripheral wall portion, and the indicator portion is formed on the flange portion.

[0010] (Configuration 4) The cover according to configuration 4 is the cover of configuration 3, wherein the flange portion allows a marking line indicating the reference position, which is affixed to the structure, to be seen through the flange portion.

[0011] (Configuration 5) The installation device according to configuration 5 is an installation device including a wall-back installation body fixed to a fixed surface of a structure extending in an extension direction, and a cover that accommodates the wall-back installation body, The wall-back installation body is a fixing portion for fixing to the fixed surface; and a positioning section attached to the structure for aligning the fixing position of the wall-back installation body with a marking line indicating a reference position determined in the extension direction of the fixing surface for installing the wall-back installation body, The cover is a bottom wall portion formed on the base end side; a peripheral wall portion that stands upright from the bottom wall portion, extends from a base end side to a tip end side, and defines an accommodation space therein that allows relative movement of the wall-back installation body along the extension direction when the wall-back installation body is entirely accommodated therein; an opening that opens at a tip of the peripheral wall portion; an indicator portion for determining an installation position of the cover in the extension direction relative to the score line; the indicator portion indicates a plurality of positions or ranges within which the installation position of the cover is allowed to be shifted in the extension direction when the cover is aligned with the score line; When the cover is installed on the fixed surface by aligning the marking line with one of the multiple positions of the indicator portion, or by aligning the marking line so that it is within the range of the indicator portion, the wall-back installation body can be moved relatively in the extension direction in the storage space, thereby aligning the alignment portion of the wall-back installation body with the marking line. [Effects of the Invention]

[0012] According to the cover of configuration 1, the cover is provided with an indicator portion for determining the installation position of the cover in the extension direction relative to a reference position determined in the extension direction of the fixed surface on which the wall-back installation body is installed. The indicator portion indicates multiple positions or ranges within which the installation position of the cover can be shifted in the extension direction when aligning the cover with the reference position. When the cover is aligned with one of the multiple positions or ranges and then installed on the fixed surface, the wall-back installation body can be aligned to the reference position. That is, when the wall-back installation body is fixed to a predetermined installation position based on the reference position of the fixed surface, the installation position of the cover can be offset relative to the installation position of the wall-back installation body within the multiple positions or ranges indicated. In this way, a margin is ensured for the installation position of the cover, thereby easing the requirement for accuracy when installing the cover on the fixed surface. In other words, the user can install the cover on the fixed surface with a margin of error based on the multiple positions or ranges indicated by the indicator portion. The user can then accurately install the wall-mounted unit in the desired location by aligning the wall-mounted unit with the reference position of the surface to be fixed inside the cover. Therefore, the cover of the present invention can improve the installation work when installing the wall-mounted unit.

[0013] According to the cover of configuration 2, the cover is provided with an indicator portion for determining the installation position of the cover in the extension direction relative to a reference position determined in the extension direction of the fixing surface for forming a wall hole in the wall. The indicator portion indicates multiple positions or ranges within which the installation position of the cover is allowed to be shifted in the extension direction when aligning the cover with the reference position. When the cover is positioned so that the reference position is aligned with one of the multiple positions or ranges and then installed on the fixing surface, the peripheral wall portion and the bottom wall portion can cover the entire wall hole formed in the wall according to the reference position. In other words, the installation position of the cover can be offset relative to the hole formation position within the multiple positions or ranges indicated. In this way, a margin is ensured for the installation position of the cover, thereby easing the requirement for accuracy in the installation position when installing the cover on the fixing surface. In other words, the user can install the cover on the fixing surface with a margin of error based on the multiple positions or ranges indicated by the indicator portion. Therefore, the cover of the present invention improves the workability of the cover installation work when covering a wall hole.

[0014] According to the cover of configuration 3, in addition to the effects of the invention of configuration 1 or 2, the indicator portion is formed on a flange portion that protrudes outward from the tip of the peripheral wall portion, making it easier for the user to see and align with the reference position.

[0015] According to the cover described in configuration 4, in addition to the effect of the invention of configuration 3, the marking line indicating the reference position attached to the structure can be seen through the transparent flange portion, making it possible to align the indicator portion and the marking line by overlapping them, making it even easier to align them to the reference position.

[0016] According to the installation device of configuration 5, the cover is provided with an indicator portion for determining the installation position of the cover in the extension direction relative to a marking line indicating a reference position determined in the extension direction of the fixed surface for installing the wall-back installation body. The indicator portion indicates multiple positions or ranges within which the installation position of the cover can be shifted in the extension direction when aligning the cover with the marking line. When the cover is installed on the fixed surface with the marking line aligned to one of the multiple positions or within the range, the wall-back installation body can be moved relative to the marking line in the extension direction within the accommodation space to align the alignment portion of the wall-back installation body with the marking line. In other words, when the wall-back installation body is fixed to a predetermined installation position based on the marking line on the fixed surface, the installation position of the cover can be offset relative to the installation position of the wall-back installation body within the multiple positions or ranges indicated. In this way, a margin is ensured for the installation position of the cover, thereby easing the requirement for accuracy in the installation position when installing the cover on the fixed surface. In other words, the user can install the cover on the surface to be fixed with a margin of error based on the multiple positions or ranges indicated by the indicators. Then, the user can accurately install the wall-back installation unit in the desired location by aligning the wall-back installation unit within the cover with the markings on the surface to be fixed. Therefore, the installation device of the present invention can improve the installation process. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is an exploded perspective view of an installation device according to an embodiment of the present invention; [Figure 2] 2 is a schematic perspective view of a wiring box (back-of-wall installation body) of the installation device of FIG. 1. [Figure 3] FIG. 2 is a schematic perspective view of a cover of the installation device of FIG. 1; [Figure 4] (a) Front view and (b) rear view of the cover in Figure 3. [Figure 5] (a) Plan view and (b) side view of the cover of Figure 3. [Figure 6] 6 is a cross-sectional view of the cover shown in FIG. 5 along line AA. [Figure 7] BB cross section of the cover in Figure 5. [Figure 8] In the cover of FIG. 6, (a) shows the extended state from the natural length, and (b) shows the shortened state. [Figure 9] 1 is a perspective view of an installation structure using an installation device according to an embodiment of the present invention; [Figure 10] FIG. 10 is a front view of the installation device of FIG. [Figure 11] FIG. 11 is a cross-sectional view of the installation structure shown in FIG. 10 . [Figure 12] DD cross section of the installation structure of Figure 10. [Figure 13] 12 is a cross-sectional view showing another example (shallow fixed body) of the installation structure of FIG. 11. [Figure 14] 10 is a schematic diagram showing a method for constructing an installation structure using an installation device according to one embodiment of the present invention, illustrating the process of temporarily fixing the cover to the fixing surface of the pillar material and accommodating a wiring box in the internal space of the cover. FIG. [Figure 15] 10 is a schematic diagram showing a state in which the cover has shifted to the upper limit of the placement limit from the reference position during the process of positioning the cover and wiring box of the embodiment of the present invention at the reference position and installing them on the fixed surface. FIG. [Figure 16] 10 is a schematic diagram showing a state in which the cover has shifted to the lower limit of the placement limit from the reference position during the process of positioning the cover and wiring box of the embodiment of the present invention at the reference position and installing them on the fixed surface. FIG. [Figure 17] 10 is a schematic diagram showing a method for constructing an installation structure using an installation device according to one embodiment of the present invention, illustrating a process for fixing a wiring box housed in a temporarily fixed cover to a fixed surface of a pillar material. FIG. [Figure 18] 10 is a schematic diagram showing the positional relationship between the coverage area of ​​the cover and the wall hole when the cover of one embodiment of the present invention is installed on a fixed surface and the cover is shifted to the upper limit of the placement limit from the reference position. FIG. [Figure 19] 10 is a schematic diagram showing the positional relationship between the coverage area of ​​the cover and the wall hole when the cover of one embodiment of the present invention is installed on a fixed surface and the cover is shifted to the lower limit of the placement limit from the reference position. FIG. [Figure 20]FIG. 10 is a schematic front view showing a modified example of the cover of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0018] An embodiment of the present invention will be described below with reference to the drawings. Note that the shapes of the drawings referred to in the following description are conceptual or schematic diagrams for explaining preferred shapes and dimensions, and the dimensional ratios do not necessarily correspond to the actual dimensional ratios. In other words, the present invention is not limited to the dimensional ratios in the drawings.

[0019] A cover 130 according to one embodiment of the present invention is used to seal the space between the wall surface and the space behind the wall when a wiring device 13 is installed in the wall 11 through a wall hole 12 formed in the wall 11, which constitutes a hollow wall. Preferably, the cover 130 functions to prevent airflows such as cold and warm air behind the wall, as well as dust and other particles, from flowing into the room on the wall surface side. Furthermore, when the cover 130 seals the wall hole 12, sound insulation properties may be imparted to the cover 130 to prevent a decrease in sound insulation properties due to the formation of the wall hole 12. Additionally or alternatively, fire resistance may be imparted to the cover 130 to prevent the inflow and outflow of toxic gases, smoke, flames, and the like generated in the event of a fire. Here, the wiring device 13 may be selected from any device installed in the wall 11, such as an outlet, a switch, or a lighting device. 9, the wiring device 13 is exemplified as a power outlet and includes a mounting frame 13a fixed to a wiring device mounting portion 114 of a wiring box 110 with screws via screw holes 13c, and a main body 13b supported by the mounting frame 13a. The wiring device 13 is configured so that wiring material 14, such as an electric cable, is connected to the back side of the main body 13b. Generally, a decorative cover 19 is attached to the front of the wiring device 13 to cover the periphery of the wiring device 13 from the front side of the wall.

[0020] An installation device 100 of this embodiment is a device for installing a wiring device 13 in a wall hole 12 drilled in a wall 11 of a building. FIG. 1 is an exploded perspective view of the installation device 100 of one embodiment of the present invention. As shown in FIG. 1, the installation device 100 includes a wiring box 110 as a back-of-wall installation body that is installed behind the wall through the wall hole 12, and a cover 130 for sealing the space between the wall surface space and the back-of-wall space. The wiring device 13 may be fixed integrally to the back-of-wall installation body. The installation structure 10 of this embodiment is a structure in which the wiring device 13 is installed on the wall 11 by the installation device 100 of this embodiment.

[0021] Referring to FIG. 2, a wiring box 110 exemplified as a wall-mounted device of the present invention will be described. FIG. 2 is a schematic perspective view of the wiring box 110. The wiring box 110 is a rectangular box with a bottom and is configured to accommodate a portion of the wiring device 13 and wiring material 14 therein. The wiring box 110 includes a rectangular annular side wall 111, a front opening 112 that opens in front of the side wall 111, and a rear wall 113 that closes the rear side of the side wall 111. In the wiring box 110 of this embodiment, the vertical (longitudinal) sides of the side wall 111 are longer than the horizontal (width) sides. The front opening 112 is formed inside the rectangular frame and is configured to expose the interior space of the wiring box 110 to the front side (wall surface side).

[0022] Furthermore, a wiring apparatus mounting portion 114 for fixing the wiring apparatus 13 through the front opening 112 is provided on the front surface of the wiring box 110. The wiring apparatus mounting portion 114 is a pair of screw holes formed above and below the front opening 112. That is, the wiring apparatus mounting portion 114 is configured so that a user can mount the wiring apparatus 13 from the front side of the wall through the wall opening 12 with screws. In this embodiment, the wiring apparatus mounting portion 114 is capable of mounting one wiring apparatus 13.

[0023] The side wall 111 is provided with through-holes 115 through which the wiring materials 14 can be inserted between the inside and outside. In this embodiment, two through-holes 115 are formed in each of a pair of vertical (vertical) side surfaces of the side wall 111. Each through-hole 115 is a hole large enough to insert one or more wiring materials 14. The through-holes 115 may be closed with a closing plate when not in use. In this case, the closing plate is punched out when the box is in use. Furthermore, a fixing portion 116 is provided on a side surface of the side wall 111 facing the width direction for fixing the wiring box 110 to a fixing surface. The fixing portion 116 is a through-hole extending in the front-to-rear direction into which a screw is driven. In this embodiment, as shown in FIG. 9 , the side surface adjacent to the front or rear surface of the pillar 15 is defined as the fixing surface 16.

[0024] Furthermore, alignment portions 118 for aligning the fixing position of the wiring box 110 are provided on the front surface of the frame surrounding the front opening 112. The alignment portions 118 are formed at the middle positions in the longitudinal and width directions, respectively, and consist of marks pointing to the outside of the frame. The alignment portions 118 are configured to indicate the center position of the wiring box 110 when viewed from the front. Specifically, by aligning the alignment portions 118 with the marking lines 17 drawn based on the reference position of the fixing surface 16 of the pillar material 15 of the building, the wiring box 110 can be installed in the reference position (a predetermined height position).

[0025] Next, a cover 130 according to one embodiment of the present invention will be described with reference to Figures 3 to 8. Figure 3 is a schematic perspective view of the cover 130 according to this embodiment. Figures 4(a) and 4(b) are a front view and a rear view of the cover 130. Figures 5(a) and 5(b) are a plan view and a side view of the cover 130. Figures 6 and 7 are AA and BB cross-sectional views of the cover 130. Figures 8(a) and 8(b) are plan views showing the extended and retracted states of the cover 130.

[0026] The cover 130 of this embodiment is made of a flexible material and is formed in the shape of a bottomed box with an opening at the front. The cover 130 is installed behind a wall with its front facing the wall surface and is configured to seal the wall surface space and the wall back space. As shown in FIGS. 3 to 7 , the cover 130 includes a peripheral wall portion 131 that extends from its front end to its rear end, defines an internal storage space behind the wall, and has an opening 132 at its front end that exposes the storage space to the wall surface; a flat bottom wall portion 133 that closes the rear end surface of the peripheral wall portion 131; and a rectangular frame-shaped flange portion 134 that extends outward from the outer periphery of the peripheral wall portion 131 on the front end side of the peripheral wall portion 131. The peripheral wall portion 131, the bottom wall portion 133, and the flange portion 134 are integrally formed.

[0027] The peripheral wall portion 131 has a rectangular ring shape in a front view that separates the interior from the exterior. The opening 132 is defined by the inner circumferential surface of the peripheral wall portion 131 in a front view and connects the storage space to the exterior space. The opening 132 has a rectangular shape with long sides in the vertical direction. In this embodiment, the opening 132 is large enough to allow the wiring box 110 to pass through the opening 132 into the storage space. In other words, the opening 132 is larger than the front opening 112 of the wiring box 110. In this embodiment, the storage space separated by the peripheral wall portion 131 is large enough to accommodate the entire wiring box 110. Furthermore, in this embodiment, the peripheral wall portion 131 defines an internal storage space that allows relative movement of the wiring box 110 along the longitudinal direction (the extension direction of the fixed surface 16) of the wiring box 110 when the wiring box 110 is accommodated therein.

[0028] The peripheral wall 131 is provided with a non-deformable region 131a that extends continuously from the front end and does not deform in the front-rear direction, and a deformable region 131b that is arranged behind the non-deformable region 131a and expands and contracts in the front-rear direction. The non-deformable region 131a is a flat, annular wall. As shown in FIG. 8, the deformable region 131b has a bellows shape that can expand and contract in the front-rear direction from its natural length. That is, the volume of the storage space can be expanded or contracted in the front-rear direction by the deformable region 131b expanding and contracting in the front-rear direction. FIG. 8(a) shows the deformable region 131b expanded to its maximum extended length, and FIG. 8(b) shows the deformable region 131b contracted to its minimum retracted length. The deformable region 131b has a natural length L in the front-rear direction, and as shown in FIG. 8(a), it has a maximum extended length L+ΔL1 and a minimum retracted length L-ΔL2. Here, the natural length L in the front-rear direction is greater than half the maximum extended length ((L+ΔL1) / 2). As will be described later, in this embodiment, when the deformation region 131b is at its natural length, the rear wall 113 and the bottom wall 133 of the wiring box 110 accommodated in the accommodation space are spaced apart in the front-rear direction, and the deformation region 131b can be shortened and deformed so as to move the bottom wall 133 forward from its natural length.

[0029] The non-deformation region 131a of the peripheral wall 131 has an introduction portion 135 for introducing the wiring 14 into the storage space. In this embodiment, the introduction portion 135 is formed only on two longitudinal side surfaces of the peripheral wall 131 (i.e., the top and bottom surfaces of the peripheral wall 131). Two introduction portions 135 are formed on each side surface. Each introduction portion 135 is a circular inwardly recessed portion that opens when the wiring 14 is inserted and closes when the wiring 14 is not inserted. The introduction portion 135 may be opened by cutting along the circular recess or by a notch. Here, since the introduction portion 135 is formed in the non-deformation region 131a, when the cover 130 is installed in the wall hole 12, the introduction portion 135 can always be positioned at a fixed position relative to the front end of the cover 130 or the flange portion 134, based on the front-to-rear distance between the flange portion 134 and the introduction portion 135. In addition, the position of each introduction section 135 is determined so that it is at least partially opposite each corresponding through-hole section 115 when the side wall section 111 of the wiring box 110 is accommodated in the accommodation space of the cover 130 and the opening section 132 and the front opening section 112 are arranged on the same plane.

[0030] Additionally, the non-deformation region 131a of the peripheral wall portion 131 is provided with a plurality of reinforcing ribs 136 extending in the front-to-rear direction. In this embodiment, three reinforcing ribs 136 are provided on each of the top and bottom surfaces of the peripheral wall portion 131. Specifically, two reinforcing ribs 136 are formed on both ends in the width direction, and one reinforcing rib 136 is formed in the center in the width direction. The introduction portion 135 is sandwiched between adjacent reinforcing ribs 136. The reinforcing ribs 136 structurally reinforce the periphery of the introduction portion 135, and thereby function to suppress deformation of the non-deformation region 131a without impeding deformation of the deformation region 131b when the wiring material 14 is introduced into the accommodation space through the introduction portion 135.

[0031] The flange portion 134 is an extending plate portion that protrudes by a predetermined size from the outer peripheral surface of the peripheral wall portion 131 at the front end position. The flange portion 134 is annular so as to surround the entire circumference of the opening 132, and its front surface is configured to abut the entire periphery of the wall hole 12. In other words, an abutment surface that extends annularly along the outer periphery of the opening 132 is formed on the front surface of the flange portion 134. The abutment surface is configured as a flat surface so that the front surface abuts the entire periphery of the wall hole 12 on the back surface of the wall without any gaps. In addition, the back surface of the flange portion 134 is positioned so that the cover 130 abuts against the side surface (front surface) of the pillar material 15. As described below, the flange portion 134 can be temporarily fixed to the fixed surface 16 by positioning the cover 130 at a predetermined position on the pillar material 15 using temporary fixing means such as adhesive tape or double-sided tape.

[0032] In addition, indicators 137 are provided on the front surface of flange 134 to indicate the fixing position of cover 130. Indicators 137 are formed at intermediate positions in the longitudinal and width directions, and consist of triangular marks pointing outward from flange 134. Indicators 137 are configured to indicate the center position of cover 130 when viewed from the front.

[0033] As shown in FIG. 4( a), an indicator 138 is provided on the front surface of the flange 134, serving as an indicator for the installation position of the cover 130 on the fixed surface 16. The indicator 138 is configured to determine the installation position of the cover 130 in the extension direction relative to a reference position (marked line 17) determined in the extension direction of the fixed surface 16 for installing the wiring box 110. The indicator 138 is a mark that indicates an arrangement limit within which the installation position of the cover 130 can be shifted in the extension direction when aligning the cover 130 with the reference position (marked line 17). When the cover 130 is installed on the fixed surface 16 according to the indicator 138 so that the reference position (marked line 17) is within the range of the arrangement limit, the wiring box 110 can be moved relatively within the accommodation space of the cover 130 to be aligned with the reference position.

[0034] More specifically, the indicator portion 138 is a mark visible to the user that indicates a predetermined range in the vertical direction of the cover 130 corresponding to the extension direction of the fixed surface 16. The indicator portion 138 includes a first boundary portion 138a and a second boundary portion 138b that visually display the upper and lower limits of the placement limit, which indicate the margin for the installation position of the cover 130, and is an area within the range of these upper and lower limits. The first boundary portion 138a and the second boundary portion 138b are formed by a mark combining a triangle and a line pointing outward from the flange portion 134. Note that the mark may be represented by only two lines without the triangle, or may be expressed by letters or other symbols. The first boundary portion 138a and the second boundary portion 138b are positioned at equal distances from the vertical center position of the cover 130 (the middle indicator portion 137). In other words, the first boundary portion 138a, the indicator portion 137, and the second boundary portion 138b are positioned at equal intervals. The distance between the first boundary 138a and the second boundary 138b corresponds to the distance that the wiring box 110 accommodated in the accommodation space of the peripheral wall 131 can move relative to the housing in the extension direction (vertical direction). By installing the cover 130 so that the marking line 17 of the pillar 15 of the building is positioned between the first boundary 138a and the second boundary 138b, it is possible to position the wiring box 110 at a reference position after installing the cover 130. Furthermore, by installing the cover 130 so that the marking line 17 of the pillar 15 of the building is positioned between the first boundary 138a and the second boundary 138b, when the wall hole 12 is formed in the erected wall 11 based on the reference position, the peripheral wall 131 and the bottom wall 133 can cover the entire wall hole 12.

[0035] The cover 130 of this embodiment is made of a flexible material that can adhere to a wall surface or the like so as to function as a packing. In particular, the cover 130 is preferably made of a soft synthetic resin that is transparent and flexible. For example, the cover 130 may be manufactured by forming a soft synthetic resin material such as polyvinyl chloride resin, polypropylene resin, or synthetic rubber into a predetermined shape by press molding or vacuum molding.

[0036] Alternatively, the cover 130 may be configured to have the following functionality.

[0037] The cover 130 of this embodiment may be formed from a high-specific gravity, high-hardness rubber as a sound-insulating material and integrally manufactured by a vulcanization molding method. That is, the cover 130 may be formed from an elastic material with high sound-insulating properties. This allows the cover 130 to function as a sound-insulating cover. The high-hardness rubber used is ethylene propylene diene rubber (EPDM), which has a specific gravity of 2 or more and a hardness of 85 to 95. The hardness of the rubber is measured using a durometer (JIS K6253), a measurement method used for vulcanized rubber. The cover 130 may be manufactured from rubber whose hardness is measured using a type D durometer for high hardness. The hardness of the cover 130 is preferably set to 85 or more so that vibration of the cover 130 due to sound propagating to the cover 130 from the surface of the wall is suppressed. Furthermore, the hardness of the cover 130 is preferably set to 85 or more in order to maintain the shape of the cover 130 (particularly the flange portion 134). Furthermore, the hardness of the cover 130 is preferably set to 95 or less in order to make the cover 130 easily deformable.

[0038] Furthermore, the cover 130 of this embodiment may be integrally molded from a heat-expandable material capable of maintaining its shape as a fire-resistant material. More specifically, the heat-expandable material is heat-expandable rubber. This heat-expandable rubber is formed by mixing an expansion agent (expandable graphite) that expands to more than twice its volume when exposed to high heat (e.g., 300°C or higher), molding the rubber into a predetermined shape (through a molding process), and then vulcanizing the rubber. The vulcanization process involves applying heat to the rubber that has undergone the molding process, causing a vulcanization (crosslinking) reaction or an adhesion reaction, resulting in a product with rubber elasticity. The heat-expandable rubber itself maintains the bottomed box shape of the cover 130. This allows the cover 130 to function as a fire-resistant cover. Alternatively, the cover 130 may be formed from a non-heat-expandable fire-resistant material such as flame-retardant rubber or flame-retardant resin. Furthermore, the cover 130 may be formed from a fire-resistant material with sound-insulating properties so as to combine the aforementioned sound-insulating and fire-resistant properties.

[0039] Next, an installation structure 10 for a wiring device 13 constructed by the installation device 100 of this embodiment will be described with reference to Figs. 9 to 12. Fig. 9 is a schematic perspective view showing the installation structure 10. Fig. 10 is a front view of the installation structure 10. Fig. 11 is a CC cross-sectional view of the installation structure 10. Fig. 12 is a DD cross-sectional view of the installation structure 10.

[0040] The installation structure 10 of this embodiment is a structure in which a wiring device 13 is installed in a hollow wall having walls 11, 18 erected on the front and rear sides of a pillar 15, which is a structure extending in the extension direction, through a wall hole 12 formed in the front wall 11. As shown in FIG. 9 , one of the sides of the pillar 15 adjacent to the front or rear side is set as a fixing surface 16, and a wiring box 110 and a cover 130 are fixed to the fixing surface 16 with screws. Specifically, screws pass through a fixing portion 116 of the wiring box 110 and a peripheral wall portion 131 of the cover 130 and are screwed into the pillar 15, thereby fixing the wiring box 110 and the cover 130 integrally to the fixing surface 16. Furthermore, a reference position (a reference height position) for installing the wiring box 110 as a wall-back installation body is determined in the extension direction of the fixing surface 16 based on a predetermined planned installation position of the wiring device 13 within the wall 11. A scribed line 17 is marked on at least the front surface of the side surface of the pillar material 15 based on the reference position. Then, the wiring box 110 is installed in a state aligned based on the scribed line 17. Specifically, the point indicated by the alignment portion 118 of the wiring box 110 and the scribed line 17 are positioned at the same height. Then, as shown in FIG. 10 , the wiring device 13 is fixed to the wiring device mounting portion 114 of the wiring box 110 through the wall hole 12. At this time, the mounting frame portion 13a of the wiring device 13 abuts against the periphery of the wall hole 12 from the front side, and the screws are screwed into the wiring device mounting portion 114 through the screw holes 13c, whereby the wall 11 is sandwiched between the wiring device 13 and the wiring box 110.

[0041] 11 and 12 , in the installation structure 10, the entire wiring box 110 is accommodated in the accommodation space of the cover 130, and the front surface (abutment surface) of the flange portion 134 of the cover 130 abuts against the rear surface of the wall 11 (the periphery of the wall opening 12). The annular flange portion 134 abuts against the entire periphery of the wall opening 12, and the peripheral wall portion 131 and bottom wall portion 133 of the cover 130, together with the wiring box 110, cover the entire wall opening 12 from behind. In addition, the front surface of the frame surrounding the front opening 112 of the wiring box 110 also abuts against the periphery of the wall opening 12. In other words, the side wall portion 111 of the wiring box 110 is accommodated in the accommodation space of the cover 130, and the opening 132 of the cover 130 and the front opening 112 of the wiring box 110 are arranged on the same plane. In the installation structure 10, the wall surface space (indoor space) and the back-of-wall space are sealed in a substantially airtight state (except for the insertion holes for the wiring material 14). In this embodiment, the deformation region 131b of the peripheral wall portion 131 of the cover 130 remains at its natural length, and the rear end (outer surface of the rear wall portion 113) of the wiring box 110 accommodated in the accommodation space is spaced apart in the front-to-rear direction from the inner surface of the bottom wall portion 133 of the cover 130. From this state, the deformation region 131b may be shortened to move the bottom wall portion 133 forward until the outer surface of the bottom wall portion 133 abuts against the rear wall portion 113. Although not shown, if the wiring box 110 is deeper, the deformation region 131b may be extended to move the bottom wall portion 133 rearward, thereby allowing the wiring box 110 to be accommodated in the accommodation space.

[0042] In addition, in the installation structure 10, wiring material 14 as a cable is connected to the wiring fixture 13. As shown in FIG. 11 , when the wiring box 110 and the cover 130 are installed against the wall 11, the through-hole portion 115 of the wiring box 110 and the introduction portion 135 of the cover 130 are at least partially inwardly and outwardly communicated. The wiring material 14 extending into the space behind the wall is introduced into the storage space of the cover 130 through the open introduction portion 135 and is drawn into the internal space of the wiring box 110 through the through-hole portion 115 opposite the introduction portion 135. In the installation structure 10 of this embodiment, the wiring material 14 is wired in a substantially straight line so as to pass through the introduction portion 135 and the through-hole portion 115, which are opposed to each other vertically. That is, in the installation structure 10, the wiring material 14 is wired without any sharp bends, which can be said to improve the manageability of the wiring material 14.

[0043] FIG. 13 shows an installation structure 10′ using an installation device 100′ as another example. In the installation structure 10′ of FIG. 13, the distance between the front wall 11′ where the wall hole 12 is formed and the rear wall 18′ is small, and a shallow second wiring box 110′ (shallow fixed body) is selected. That is, the wall-back installation body constituting the installation device 100′ can be composed of a wiring box (deep fixed body) 110 extending a first length in the front-rear direction and a second wiring box (shallow fixed body) 110′ extending a second length in the front-rear direction that is shorter than the first length. Either one may be selected and used based on the front-rear size of the back-wall space. In both the wiring box (deep fixed body) 110 and the second wiring box (shallow fixed body) 110′, the introduction portion 135 and the through-hole portion 115 are configured to at least partially communicate inward and outward directions when the opening 132 and the front opening 112 of the cover 130 are arranged on the same plane. In other words, the introduction portion 135 overlaps with the inner area of ​​the through-hole portion 115. In addition, in the installation structure 10' of Fig. 13, the deformation region 131b of the peripheral wall portion 131 of the cover 130 is deformed so as to be shortened, and the bottom wall portion 133 is moved forward so as not to interfere with the rear wall 18'.

[0044] Next, a method for constructing the installation structure 10 using the installation device 100 of one embodiment will be described with reference to FIGS. 14 and 15 . First, based on a predetermined planned installation position of the wiring device 13 within the wall surface of the wall 11, a reference position indicating a position for fixing the wiring box 110 to the fixing surface 16 of the pillar material 15 is determined in the extension direction (height direction) of the fixing surface 16. Based on this reference position, a marking line 17 is applied to the side surface (front surface and / or fixing surface 16) of the pillar material 15. In this embodiment, this marking line 17 corresponds to the center position of the wiring device 13 and wiring box 110 in the height (vertical) direction to be installed. In other words, by aligning the alignment portion 118 of the wiring box 110 so that it coincides with the marking line 17, it is possible to install the wiring device 13 in a predetermined planned installation position.

[0045] As shown in FIG. 14 , the cover 130 is applied to the pillar 15 by abutting the back surface of the flange 134 against the front surface of the pillar 15 and abutting one side surface of the peripheral wall 131 against the fixed surface 16. Next, the flange 134 is attached to the front surface of the pillar 15 using temporary fixing means 139 such as adhesive tape or double-sided tape, thereby temporarily fixing the cover 130 to the fixed surface 16. The cover 130 may also be permanently fixed to the fixed surface 16 with screws or the like. Next, the wiring box 110 is grasped from the front side of the wall and inserted into the storage space inside the peripheral wall 131 through the opening 132 of the cover 130. When arranging the cover 130 and the wiring box 110, the deformation region 131b of the peripheral wall 131 may be expanded or contracted depending on the depth of the wiring box 110 and the front-to-rear width of the space behind the wall.

[0046] The installation position (temporarily fixed position) of the cover 130 is determined based on the indicator portion 138 and the scribe line 17 (reference position). Since the flange portion 134 of the cover 130 is transparent, the alignment process using the indicator portion 138 and the scribe line 17 is easy. In FIG. 14 , the indicator portion 137 of the cover 130 is positioned so that it coincides with the scribe line 17. However, the cover 130 only needs to be installed so that the scribe line 17 is positioned at least in the range between the first boundary portion 138a and the second boundary portion 138b of the indicator portion 138. In particular, since a margin is generated in the extension direction (vertical direction) at the temporarily fixed position of the cover 130, precise alignment of the cover 130 is not required. Therefore, the difficulty of the task of holding the cover 130 at a predetermined height with one hand and temporarily fixing the cover 130 using a temporary fixing means with the other hand can be significantly reduced. Since the flange portion 134 of the cover 130 is transparent, the alignment process is easy.

[0047] For example, as shown in FIG. 15 , when the cover 130 is installed at a position where the marking line 17 and the first boundary 138a coincide (when the cover 130 is placed at a lower position on the fixed surface 16), the alignment portion 118 of the wiring box 110 can be aligned with the marking line 17 by sliding the wiring box 110 to a relatively upper end position within the accommodation space of the cover 130. On the other hand, as shown in FIG. 16 , when the cover 130 is installed at a position where the marking line 17 and the second boundary 138b coincide (when the cover 130 is placed at a higher position on the fixed surface 16), the alignment portion 118 of the wiring box 110 can be aligned with the marking line 17 by sliding the wiring box 110 to a relatively lower end position within the accommodation space of the cover 130. In other words, even if the cover 130 is installed at a position offset within the range indicated by the indicator portion 138 from the reference position in the extension direction of the fixed surface 16, this does not hinder installation of the wiring box 110. That is, in the cover 130 of this embodiment, by effectively utilizing the indicator portion 138, it is possible to improve the installation work of the wiring box 110 and the cover 130 on the wall 11.

[0048] 17, with the alignment portion 118 of the wiring box 110 aligned with the scribed line 17, a screw is screwed from the inside to the outside into the fixing portion 116. The screw is inserted from the front opening 112, penetrates the fixing portion 116 and the peripheral wall portion 131 of the cover 130, and is driven into the fixing surface 16.

[0049] Then, one or more introduction portions 135 for introducing wiring 14 wired behind the wall are selected, and insertion holes are formed in the introduction portions 135. It is preferable to introduce the tip portion of wiring 14 into the storage space of cover 130 via introduction portion 135, and then pass wiring 14 through through-hole portion 115 of wiring box 110, thereby drawing wiring 14 into the internal space of wiring box 110. Note that because the position of introduction portion 135 is determined based on flange portion 134, introduction portion 135 can always be positioned in a fixed position when cover 130 is installed in wall hole 12, making it possible to standardize installation.

[0050] Next, walls 11 and 18 are erected on the front and rear surfaces of the pillar 15, respectively, to form a hollow wall. At this time, the front surface of the flange portion 134 of the cover 130 is abutted against the rear surface of the wall 11. A portion of the flange portion 134 of the cover 130 is sandwiched between the rear surface of the wall 11 and the front surface of the pillar 15. A wall hole 12 is formed at a predetermined position in the front wall 11, and the wiring device mounting portion 114 of the wiring box 110 faces the wall surface through the wall hole 12. The drilling position of the wall hole 12 may be determined by detecting the position of the magnetic boss 119 of the box 110 from the wall surface. At this point, the front and rear spaces separated by the cover 130 are airtightly sealed. After the wall hole 12 is formed, the magnetic boss 119 in the center of the wiring box 110 is broken off. Next, the wiring material 14 is pulled out toward the wall surface, and the tip of the wiring material 14 is connected to the wiring device 13. Then, the wiring device 13 is fixed to the wiring device mounting portion 114 with screws, whereby the installation structure 10 can be constructed.

[0051] The following describes the effects of the cover 130 and the installation device 100 according to one embodiment of the present invention.

[0052] According to the cover 130 and installation device 100 of this embodiment, the cover 130 is provided with an index portion 138 for determining the installation position of the cover 130 in the extension direction relative to a reference position (marked line 17) defined in the extension direction of the fixed surface 16 for installing the wiring box 110 as a wall-back installation object. The index portion 138 indicates an arrangement limit within which the installation position of the cover 130 is allowed to be shifted in the extension direction when aligning the cover 130 with the reference position. When the cover 130 is installed on the fixed surface 16 so that the reference position is within the range of the arrangement limit, the wiring box 110 can be aligned to the reference position. In other words, when the wiring box 110 is fixed to a predetermined installation position based on the reference position of the fixed surface 16, the installation position of the cover 130 can be offset relative to the installation position of the wiring box 110 within the range of the arrangement limit. In this way, a margin is ensured for the installation position of the cover 130, and therefore the requirement for accuracy in the installation position of the cover 130 when installing the cover 130 on the fixed surface 16 is relaxed. In other words, the user can install the cover 130 on the fixed surface 16 with a margin of error in alignment based on the placement limit indicated by the indicator portion 138. Then, the user can accurately install the wiring box 110 in a predetermined installation position by aligning the wiring box 110 inside the cover 130 with the reference position of the fixed surface 16. Therefore, the cover 130 and installation device 100 of this embodiment can improve the installation work.

[0053] As described above, one example of use of the cover 130 as the installation device 100 including the wiring box 110 and the cover 130 has been described. However, the cover 130 of this embodiment may also be used in a configuration in which the wiring box 110 is not installed as a back-of-wall installation body. That is, the cover 130 may be installed on the fixed surface 16 of the pillar material 15 extending in the extension direction and used to cover the wall hole 12 formed in the wall 11 from the back side of the wall. In particular, in the cover 130 of this embodiment, the bottom wall portion 133 is formed to cooperate with the peripheral wall portion 131 to cover the wall hole 12 from the back side of the wall. As a result, the wall hole 12 is drilled in the wall 11 so that the entire wall hole 12 is included inside the outline of the cover 130 when viewed from the front of the wall 11. This allows the cover 130 to cover the wall hole 12 from the back side of the wall, sealing the space before and after the cover 130. It goes without saying that after the wall hole 12 is drilled, the wiring box 110 may be installed in the storage space of the cover 130 from the surface of the wall through the wall hole 12.

[0054] Furthermore, the indicator 138 (as in the installation device 100) makes it possible to determine the installation position of the cover 130 in the extension direction relative to a reference position (scored line 17) determined in the extension direction of the fixed surface for forming the wall hole 12 in the wall 11. Here, the scored line 17 may be attached to the post 15 so as to coincide with the center position of the wall hole 12. The indicator 138 indicates an arrangement limit within which the installation position of the cover 130 is allowed to be shifted in the extension direction when aligning the cover 130 with the reference position. That is, when the cover 130 is installed on the fixed surface 16 so that the reference position (scored line 17) is within the range of the arrangement limit (between the first boundary 138a and the second boundary 138b), the peripheral wall 131 and the bottom wall 133 can cover the entire wall hole 12 formed in the wall according to the reference position.

[0055] 18 and 19 show a state in which the cover 130 is positioned at a reference position using the indicator portion 138 and installed on the fixed surface 16. This state is the state before the walls 11, 18 are erected in front of and behind the pillar 15, and the imaginary line indicates the planned position for forming the wall hole 12. At this time, the cover 130 may be temporarily fixed to the pillar 15 by the temporary fixing means described above, or may be permanently fixed with screws or the like.

[0056] For example, as shown in FIG. 18 , even when the cover 130 is installed at a position where the score line 17 and the first boundary 138a coincide (when the cover 130 is placed at a lower position on the fixed surface 16), the wall hole 12 to be formed is included within the coverage area of ​​the cover 130. On the other hand, as shown in FIG. 19 , even when the cover 130 is installed at a position where the score line 17 and the second boundary 138b coincide (when the cover 130 is placed at a higher position on the fixed surface 16), the wall hole 12 to be formed is included within the coverage area of ​​the cover 130. That is, even if the cover 130 is installed at a distance within the range indicated by the indicator portion 138 from the reference position in the extension direction of the fixed surface 16, the coverage of the wall hole 12 formed at the predetermined position is not hindered. That is, with the cover 130 of this embodiment, the indicator portion 138 is effectively used to improve the installation work of the wiring device 13 on the wall 11.

[0057] That is, with the cover 130 of this embodiment, the installation position of the cover 130 can be offset relative to the formation position of the wall hole 12 within the range of the placement limit. In this way, a margin is ensured for the installation position of the cover 130, so when installing the cover 130 on the fixed surface 16, the requirement for accuracy in the installation position is alleviated. In other words, the user can install the cover 130 on the fixed surface with a margin for alignment based on the placement limit indicated by the indicator portion 138. Therefore, the cover 130 of this embodiment can also improve the workability of the installation work of the cover 130 when covering the wall hole 12.

[0058] In the above embodiment, the first boundary 138a and the second boundary 138b of the indicator 138 indicate the placement limit, and the range between the first boundary 138a and the second boundary 138b is the allowable installation position relative to the marking line 17 (reference position). However, the indicator 138 does not strictly indicate the boundary position of the placement limit, but rather indicates the range within which installation is permitted. In other words, the present invention does not intend that, when the reference position is aligned outside the first boundary 138a (or the second boundary 138b), the wiring box 110 (back-of-wall installation object) cannot be immediately installed at the reference position or cannot cover the entire wall hole. In other words, even when the reference position is aligned outside the first boundary 138a (or the second boundary 138b), the wiring box 110 may still be able to be accommodated in the storage space when aligned at the reference position, or may be able to cover the entire wall hole.

[0059] Alternatively, the first boundary 138a may indicate an upper installation position for accommodating the wiring box 110 (wall-mounted object) by bringing it closer to the upper side (one side) of the accommodation space of the cover 130 (or for covering the wall hole 12), and the second boundary 138b may indicate a lower installation position for accommodating the wiring box 110 (wall-mounted object) by bringing it closer to the lower side (other side) of the accommodation space of the cover 130 (or for covering the wall hole 12). Even in this case, the range between the upper installation position and the lower installation position is within an allowable range for shifting the installation position of the cover 130.

[0060] That is, the placement limit indicated by indicator portion 138 is not limited to a position beyond which it would be impossible to accommodate wiring box 110 (back-of-wall installation object) (or a position beyond which it would not be possible to cover the entire wall hole 12), but rather is a concept indicating that it is possible to reliably accommodate wiring box 110 or completely cover the wall hole 12 to be formed at least in the position indicated by indicator portion 138. In other words, the placement limit is a concept including a position within which wiring box 110 can be aligned with the reference position or completely cover the wall hole 12 to be formed in the wall, even if the reference position is changed to at least two different positions within that range and cover 130 is installed relative to fixed surface 16.

[0061] Furthermore, instead of the range defined by the upper and lower boundaries, the indicator 138 may be interpreted (or embodied) as points or marks indicating multiple positions within which the installation position of the cover 130 is permitted to be shifted in the extension direction. For example, the mark "138a" indicates a first position, the mark "137" indicates a second position, and the mark "138b" indicates a third position. In this case, the indicator 138 is not intended to indicate the range within the upper and lower boundaries. However, when the user aligns the marking line 17 (reference position) with one of the multiple positions (138a, 137, 138b) and installs the cover 130 on the fixed surface 16, the wiring box 110 can be aligned with the marking line 17 (or the entire wall hole 12 can be covered). Note that interpreting the multiple points indicating the alignment allowance as the range between the points provides even greater operability.

[0062] The present invention is not limited to the above-described embodiment, and various modifications are possible.

[0063] (1) The cover of the present invention is not limited to the configuration of the above embodiment. In the above embodiment, the indicator portion is formed as two marks attached to the flange portion, but the present invention is not limited to this. As shown in FIG. 20(a), the indicator portion 238 is formed as a colored surface indicating the placement limit. The upper edge of the colored surface is the first boundary portion 238a, and the lower edge is the second boundary portion 238b. As shown in FIG. 20(b), the indicator portion 338 is formed as a notch indicating the placement limit. The upper edge of the notch is the first boundary portion 338a, and the lower edge is the second boundary portion 338b. In other words, the indicator portion may be formed in various shapes as long as it can perform its function.

[0064] (2) The cover of the present invention is not limited to the configuration of the above embodiment. In the above embodiment, the indicator portion is formed on the flange portion, but the present invention is not limited to this. For example, the flange portion may be omitted from the cover. In this case, the indicator portion may be formed at any location, such as the peripheral wall portion, the bottom wall portion, or the periphery of the opening.

[0065] (3) The installation device of the present invention is not limited to the configuration of the above embodiment. The wall-back installation body is exemplified as a wiring box, but it can take various forms as long as it is installed at least behind a wall. For example, the wall-back installation body may be a frame-shaped body having an annular side wall portion with an open rear (no rear wall portion). Furthermore, although the wiring box in the above embodiment is capable of mounting one wiring device, it may be configured to mount multiple wiring devices.

[0066] (4) The cover and installation device of the present invention are not limited to the configurations of the above-described embodiments. In the above-described embodiments, the cover is configured so that its peripheral wall portion is placed in the back-of-wall space with the flange portion abutting the rear surface of the wall. However, for example, if the wall is thick, the cover and / or back-of-wall installation body may be installed only in the internal space of the wall hole. Alternatively, the internal space of the wall hole may be interpreted as part of the back-of-wall space of the wall.

[0067] (5) The shape and dimensions of the cover of the present invention are not limited to the above-described embodiment. The opening and / or flange of the cover do not have to be rectangular, and may be selected from any shape, such as a circle, an oval, or another polygon. Furthermore, the peripheral wall and / or bottom wall of the cover are not limited to being flat, and may be any shape, such as a concave or convex curved surface.

[0068] The present invention is not limited to the above-described embodiments and modifications, and can be implemented in various forms within the technical scope of the present invention. [Explanation of symbols]

[0069] 10 Installation structure 11 Wall 12 wall hole 13 Wiring devices 14 Wiring material 15 Pillar material 16 Fixed surface 17 Scribing line (reference position) 18 Wall 19 Makeup Cover 100 Installation equipment 110 Wiring box (back of wall installation) 111 Side wall 112 Front opening 113 Rear wall 114 Wiring device mounting part 115 Through hole 116 Fixed part 118 Alignment section 119 Magnet boss 130 Cover 131 Peripheral wall section 131a Non-deformed region 131b Deformation region 132 Opening 133 Bottom wall 134 Flange 135 Introduction 136 Reinforcing rib 137 Instruction section 138 Index section 138a 1st boundary 138b 2nd boundary 139 Temporary fixing means

Claims

1. A cover for accommodating a wall-back installation body fixed to a fixed surface of a structure extending in the extension direction, a bottom wall portion formed on the base end side; a peripheral wall portion that stands upright from the bottom wall portion, extends from a base end side to a tip end side, and defines an accommodation space therein for accommodating the wall-back installation body; an opening that opens at a tip of the peripheral wall portion; an indicator portion for determining the installation position of the cover in the extension direction relative to a reference position determined in the extension direction of the fixed surface for installing the wall-back installation body; the indicator portion indicates a plurality of positions or ranges within which the installation position of the cover is allowed to be shifted in the extension direction when the cover is aligned with the reference position, A cover characterized in that when the cover is installed on the fixed surface by aligning the reference position with one of the multiple positions of the indicator portion, or by aligning the reference position so that it is within the range of the indicator portion, the wall-back installation body can be aligned to the reference position.

2. A cover that is installed on a fixed surface of a structure extending in the extension direction and covers a wall hole formed in the wall from the back side of the wall, a peripheral wall portion extending from a base end side to a tip end side; a bottom wall portion formed to close a base end side of the peripheral wall portion and to cover the wall hole from the back side in cooperation with the peripheral wall portion; an opening that opens at a tip of the peripheral wall portion; an indicator portion for determining an installation position of the cover in the extension direction with respect to a reference position determined in the extension direction of the fixed surface for forming the wall hole in the wall, the indicator portion indicates a plurality of positions or ranges within which the installation position of the cover is allowed to be shifted in the extension direction when the cover is aligned with the reference position, A cover characterized in that when the cover is installed on the fixed surface by aligning the reference position with one of the multiple positions of the indicator portion, or by aligning the reference position so that it is within the range of the indicator portion, the surrounding wall portion and the bottom wall portion are able to cover the entire wall hole formed in the wall in accordance with the reference position.

3. 3. The cover according to claim 1, further comprising a flange portion that projects outward from a tip of the peripheral wall portion, and the indicator portion is formed on the flange portion.

4. The cover according to claim 3, wherein the flange portion allows a marking line indicating the reference position, which is marked on the structure, to be seen through the flange portion.

5. An installation device comprising: a wall-back installation body fixed to a fixed surface of a structure extending in an extension direction; and a cover that accommodates the wall-back installation body, The wall-back installation body is a fixing portion for fixing to the fixed surface; and a positioning section attached to the structure for aligning the fixing position of the wall-back installation body with a marking line indicating a reference position determined in the extension direction of the fixing surface for installing the wall-back installation body, The cover is a bottom wall portion formed on the base end side; a peripheral wall portion that stands upright from the bottom wall portion, extends from a base end side to a tip end side, and defines an accommodation space therein that allows relative movement of the wall-back installation body along the extension direction when the wall-back installation body is entirely accommodated therein; an opening that opens at a tip of the peripheral wall portion; an indicator portion for determining an installation position of the cover in the extension direction relative to the score line; the indicator portion indicates a plurality of positions or ranges within which the installation position of the cover is allowed to be shifted in the extension direction when the cover is aligned with the score line; An installation device characterized in that when the cover is installed on the fixed surface by aligning the marking line with one of the multiple positions of the indicator portion, or by aligning the marking line so that it is within the range of the indicator portion, the wall-back installation body can be moved relatively in the extension direction in the storage space, thereby aligning the alignment portion of the wall-back installation body with the marking line.

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