JP7690647B2 - Wiring device mounting body - Google Patents

Description

The present invention relates to a wiring device mounting body in which a pair of screw holes are arranged opposite each other on the main body with a space between them.

To install wiring devices such as electrical outlets on the walls of buildings, a wiring box in the shape of a rectangular box with a bottom and a frame-shaped box cover that is attached to the wiring box are used. A box cover is attached to the opening side of the wiring box, and the wiring box is embedded in a concrete wall or installed inside a hollow wall. A wiring device frame that holds the wiring device or the wiring device is attached directly to the box cover, and the wiring device is installed on the wall.

A rectangular or round space is opened in the center of the box cover. The box cover has screw holes at opposing positions on the periphery of the space. The pitch of the pair of screw holes is set according to the size and shape of the wiring device frame or wiring device to be attached to the box cover.

A box cover has been proposed that has a plurality of fixing parts each consisting of a pair of screw holes (see, for example, Patent Document 1). The box cover of Patent Document 1 has a first fixing part consisting of a pair of first fixing holes as screw holes and a second fixing part consisting of a pair of second fixing holes as screw holes on the periphery of the space of the box cover. The first fixing part and the second fixing part are arranged so that an imaginary line connecting the pair of first fixing holes and an imaginary line connecting the pair of second fixing holes are perpendicular to each other. In addition, the pitch between the first fixing holes in the first fixing part is different from the pitch between the second fixing holes in the second fixing part. Therefore, it is possible to fix a wiring device frame or wiring device having a different pitch between the fixing holes to the box cover when the first fixing part is used and when the second fixing part is used.

JP 2004-254495 A

However, in the box cover of Patent Document 1, for example, when fixing a wiring device to the box cover with the fixing holes lined up above and below, the mounting orientation of the box cover relative to the wiring box must be changed depending on the pitch between when the first fixing part and when the second fixing part are used, and it is troublesome to consider the mounting orientation of the box cover. If the mounting orientation of the box cover is incorrect, it is necessary to remove the box cover from the wiring box, change the mounting orientation of the box cover, and reattach the box cover to the wiring box, which is extremely troublesome.

The object of the present invention is to provide a wiring device mounting body that allows the pitch of a pair of screw holes to be easily changed.

The wiring device mounting body for solving the above problems comprises a main body surrounding a space in which a wiring device is placed, a pair of screw holes into which mounting screws for mounting the wiring device to the main body are screwed, and the pair of screw holes are disposed opposite the main body so as to sandwich the space, and the direction in which a straight line connecting the pair of screw holes extends is defined as an opposing direction, and the distance between the pair of screw holes along the opposing direction is defined as a pitch. At least one of the pair of screw holes is provided in a screw-in member attached to the main body, making it possible to change the pitch, and the screw-in member is provided with a positioning means for positioning the screw-in member so as to maintain the changed pitch.

The wiring device mounting body has a movement restriction means for restricting the movement of the screw-in member at each of the movement limit positions, the movement restriction means being composed of a member-side abutment portion provided on the screw-in member and a body-side abutment portion provided on the body, the movement of the screw-in member being restricted by the abutment between the member-side abutment portion and the body-side abutment portion, the screw-in member being infinitely movable within at least a portion of the range between the movement limit positions, and the positioning means being a screw screwed into the screw-in member, and the screw being screwed into the screw-in member to position the screw-in member so as to be immovable within the infinitely movable range.

In the wiring apparatus mounting body, the pair of screw holes may be provided in the screw-in members each having the same configuration.
The wiring apparatus mounting body may include a space narrowing portion that protrudes into the space and narrows the space.

According to the present invention, the pitch of a pair of screw holes can be easily changed.

FIG. 4 is a perspective view showing the box cover and the wiring box. FIG. 4 is an exploded perspective view showing a main body and a screw-in member of the box cover. FIG. FIG. 4 is a front view showing the box cover from the second surface side. FIG. 4 is a cross-sectional view showing the main body of the box cover. FIG. 4 is a cross-sectional view showing the box cover when the screw-in member is in a first movement limit position. FIG. 4 is a cross-sectional view showing the box cover when the screw-in member is in a first movement limit position. FIG. 11 is a cross-sectional view showing the box cover when the screw-in member is in a second movement limit position. FIG. 11 is a cross-sectional view showing the box cover when the screw-in member is in a second movement limit position. 4 is a cross-sectional view showing a wiring box and a box cover arranged in the hollow portion. FIG. A diagram of the box cover exposed on the wall surface. 13 is a diagram showing the state in which a wiring device is attached to a screw-in member in a first movement limit position. FIG. A diagram of the box cover exposed on the wall surface. 13 is a diagram showing the state in which a wiring device is attached to the screw-in member at the second movement limit position. FIG. FIG. 11 is a front view showing a box cover according to another embodiment. FIG. 11 is a front view showing a box cover according to another embodiment. FIG. 11 is a front view showing a box cover according to another embodiment.

Hereinafter, an embodiment in which a wiring device mounting body is embodied in a box cover will be described with reference to Figs.
1 or 2, a box cover 10 as a wiring device mounting body is attached to the opening side of a wiring box B, which is a rectangular box with a bottom, for mounting a wiring device 23 in the wiring box B. The wiring device may be any device that can be installed in the wiring box B, such as an outlet, a switch, a card reader, an intercom, or a fire alarm, and may be any device to which a cable wired inside the wiring box B is connected.

The box cover 10 has a plate-shaped main body 11 that surrounds a space 11c in which the wiring device 23 is arranged. The main body 11 has a first surface 11a on one side in the plate thickness direction, and a second surface 11b on the other side in the plate thickness direction. The first surface 11a and the second surface 11b are parallel to each other. The plate thickness direction of the main body 11 is the direction in which a straight line connecting the first surface 11a and the second surface 11b extends. In a front view of the main body 11 from the first surface 11a or the second surface 11b, the main body 11 is approximately a rectangular frame, and the box cover 10 is approximately a rectangular frame. The main body 11 has a pair of opposing first side edges 11d and a second side edge 11e that connects one end and the other end of the pair of first side edges 11d. In a front view of the box cover 10, the first side edge 11d and the second side edge 11e are linear. In addition, when viewed from the front of the box cover 10, the adjacent first side edge 11d and second side edge 11e are perpendicular to each other. In the following description, the direction in which the pair of first side edges 11d face each other is referred to as the first direction X, and the direction in which the pair of second side edges 11e face each other is referred to as the second direction Y. The first direction X and the second direction Y are perpendicular to each other.

When viewed from the front of the box cover 10, a space 11c opens in the center of the box cover 10. The space 11c penetrates the box cover 10 in the plate thickness direction. When viewed from the front of the box cover 10, the inner peripheral edge of the main body 11 has an elongated shape.

The box cover 10 has a rectangular frame-shaped erected portion 12 that surrounds the space 11c on the first surface 11a. The erected portion 12 protrudes from the first surface 11a along the plate thickness direction of the box cover 10. The erected portion 12 protrudes from the first surface 11a to have a predetermined thickness. The predetermined thickness of the erected portion 12 is a dimension that allows the plate-shaped screw member 25 described below to be inserted.

The erected portion 12 includes a pair of side walls 13 facing each other in the first direction X, and a pair of mounting walls 14 connecting one end and the other end of the pair of side walls 13 in the longitudinal direction. In a front view of the box cover 10, each side wall 13 is parallel to the first side edge 11d, and the longitudinal direction of the side wall 13 extends linearly in the second direction Y. In a front view of the box cover 10, each mounting wall 14 is arch-shaped and bulges toward the corresponding second side edge 11e.

As shown in FIG. 3 or FIG. 4, in a front view of the box cover 10, each side wall portion 13 has an inner surface 13a facing the space 11c and an outer surface 13b that sandwiches the side wall portion 13 with the inner surface 13a in the first direction X. In a front view of the box cover 10, each mounting wall portion 14 has an inner surface 14a facing the space 11c and an outer surface 14b that sandwiches the mounting wall portion 14 with the inner surface 14a in the second direction Y. In a front view of the box cover 10, the inner surface 13a and the outer surface 13b of each side wall portion 13 are linear. In a front view of the box cover 10, the inner surface 14a of each mounting wall portion 14 has a shape in which both ends in the first direction X are recessed toward the second side edge 11e, and the outer surface 14b of each mounting wall portion 14 is bulged toward the second side edge 11e.

The mounting wall portion 14 has a tip surface 14c at the tip in the protruding direction from the first surface 11a. The box cover 10 has an abutment rib 17 that protrudes from the standing portion 12 along the plate thickness direction. The abutment rib 17 surrounds the space 11c. The abutment rib 17 also has a flat abutment surface 17a at the tip in the protruding direction from the mounting wall portion 14.

The box cover 10 has a guide hole 15 in each mounting wall 14. In a front view of the box cover 10, the guide hole 15 is located at the center of the mounting wall 14 in the first direction X. In a front view of the box cover 10, the guide hole 15 extends straight along the second direction Y from the inner surface 14a of the mounting wall 14 toward the second side edge 11e. The guide hole 15 penetrates the mounting wall 14 along the plate thickness direction of the box cover 10. The guide hole 15 opens at the tip surface 14c and the abutment rib 17 of the mounting wall 14 on the first surface 11a side of the box cover 10, and opens at the second surface 11b on the second surface 11b side.

The box cover 10 has a mounting recess 18 surrounding the guide hole 15. On the first surface 11a side of the box cover 10, the mounting recess 18 is recessed from the tip surface 14c of the mounting wall portion 14 and the abutment surface 17a of the abutment rib 17, and on the second surface 11b side of the box cover 10, the mounting recess 18 is recessed from the second surface 11b. When viewed from the front of the box cover 10, the mounting recess 18 is U-shaped.

The box cover 10 has a flat support surface 18a at the end of the recessed mounting recess 18. On the first surface 11a side of the box cover 10, the support surface 18a is provided at a position recessed from the tip surface 14c of the mounting wall portion 14 and the abutment surface 17a of the abutment rib 17, and on the second surface 11b side, the support surface 18a is provided at a position recessed from the second surface 11b. When viewed from the front of the box cover 10, the support surface 18a is U-shaped and surrounds the guide hole 15.

The dimension of the guide hole 15 in the first direction X is slightly larger than the diameter of the shaft 31 of the screw 30 described below. Also, the dimension of the mounting recess 18 in the first direction X is slightly larger than the diameter of the head 32 of the screw 30. Therefore, the shaft 31 of the screw 30 can be inserted into the guide hole 15, and the head 32 of the screw 30 can be accommodated inside the mounting recess 18.

As shown in FIG. 2 or 5, the box cover 10 has an insertion groove 19 in the mounting wall 14. The insertion groove 19 opens toward the space 11c on the inner surface 14a of the mounting wall 14 and the inner surface 13a of the side wall 13, and opens toward the outside on the outer surface 14b of the mounting wall 14. The opening width of the insertion groove 19 along the plate thickness direction of the box cover 10 is slightly larger than the plate thickness of the screw-in member 25 described below. In addition, the opening width of the insertion groove 19 along the first direction X is slightly larger than the maximum dimension of the screw-in member 25 in the first direction X.

The opening width of the insertion groove 19 in the first direction X is constant along the second direction Y from the outer surface 14b of the mounting wall 14 to just before it reaches the inner surface 14a. The insertion groove 19 is also formed on the inner surface 13a of each side wall 13. Each side wall 13 has a step surface 13d that is recessed from the inner surface 13a toward the outer surface 13b.

Next, the screw member 25 to be inserted into the insertion groove 19 will be described.
The screw-in member 25 is made of a thin metal plate. In a front view of the screw-in member 25 from the plate thickness direction, the screw-in member 25 is T-shaped. The screw-in member 25 has a first screw hole 25a into which the shaft portion 31 of the screw 30 described above is screwed. The first screw hole 25a is a female screw. The screw-in member 25 also has a second screw hole 25b. The shaft portion 41 of the mounting screw 40 for mounting the wiring device 23 to the box cover 10 is screwed into the second screw hole 25b. The second screw hole 25b is a female screw. In the screw-in member 25, the direction in which the first screw hole 25a and the second screw hole 25b are aligned is defined as the juxtaposition direction H. The direction along both sides of the screw-in member 25 in the plate thickness direction and perpendicular to the juxtaposition direction H is defined as the width direction F.

The screw-in member 25 has abutment pieces 26 on both ends in the width direction F. The screw-in member 25 also has a screw hole forming portion 27 that protrudes beyond both abutment pieces 26 in the juxtaposition direction H. The second screw hole 25b is provided in the screw hole forming portion 27.

The maximum dimension of the screw-in member 25 in the parallel installation direction H is approximately the same as the maximum dimension of the outer surface 14b and the inner surface 14a of the mounting wall portion 14 in the second direction Y. In addition, the maximum dimension of the screw-in member 25 in the width direction F is slightly smaller than the opening width of the insertion groove 19 in the first direction X.

As shown in FIG. 7 or FIG. 9, the screw member 25 is inserted into the insertion groove 19 from the outer surface 14b side of the mounting wall portion 14. The screw member 25 is inserted into the insertion groove 19 from the screw hole forming portion 27. The screw member 25 is accommodated in the insertion groove 19 so as to be movable in the second direction Y. Meanwhile, both end edges of the screw member 25 in the width direction F are slightly spaced from the inner end surface of the insertion groove 19 in the first direction X. Therefore, the movement of the screw member 25 in the first direction X is restricted within the insertion groove 19.

As shown in FIG. 3, the first screw hole 25a of the screw-in member 25 is exposed to the outside of the mounting wall portion 14 through the guide hole 15 of the mounting wall portion 14. As shown in FIG. 6 or 7, the shaft portion 31 of the screw 30 that has passed through the guide hole 15 is screwed into the first screw hole 25a of the screw-in member 25, and the screw-in member 25 and the screw 30 are integrated.

The head 32 of the screw 30 screwed into the first screw hole 25a abuts against the inner surface of the mounting recess 18, restricting further movement of the screw-in member 25 along the second direction Y and restricting the screw-in member 25 from slipping out of the outer surface 14b of the insertion groove 19. The position where the movement of the screw-in member 25 is restricted by the abutment between the screw 30 and the main body 11 is the first movement limit position P1 of the screw-in member 25. Therefore, the movement of each screw-in member 25 from the first movement limit position P1 to the outer surface 14b of the mounting wall portion 14 is restricted by the abutment between the head 32 of the screw 30 and the inner surface of the mounting recess 18. In this embodiment, the screw 30 integrated with the screw-in member 25 constitutes a member-side abutment portion as a movement restriction means, and the inner surface of the mounting recess 18 of the main body 11 constitutes a body-side abutment portion as a movement restriction means provided in the main body 11.

When the screw-in member 25 is in the first movement limit position P1, the tip 27a of the screw hole forming portion 27 in the juxtaposition direction H of the screw-in member 25 is flush with the inner surface 14a of the mounting wall portion 14. At the first movement limit position P1, the second screw hole 25b of the screw-in member 25 is exposed to the outside of the box cover 10 from a position of the guide hole 15 that is close to the inner surface 14a of the mounting wall portion 14.

When the screw-in member 25 is in the first movement limit position P1, the head 32 of the screw 30 is pressed against the support surface 18a of the mounting recess 18, so that the screw-in member 25 can be positioned so that it cannot move to the first movement limit position P1. Therefore, the screw 30 constitutes a positioning means for positioning the screw-in member 25 so that it cannot move.

As shown in FIG. 9, the abutment piece 26 on one end side of the screw-in member 25 in the width direction F can abut against the step surface 13d of one side wall portion 13, and the abutment piece 26 on the other end side of the width direction F can abut against the step surface 13d of the other side wall portion 13. The abutment of each abutment piece 26 of the screw-in member 25 against each step surface 13d restricts movement of the screw-in member 25 toward the space 11c beyond the abutment position.

The pair of abutting pieces 26 abut against the step surface 13d, restricting the movement of the screw-in member 25 toward the inner surface 14a of the mounting wall portion 14, and restricting the screw-in member 25 from slipping out from the inner surface 14a side of the insertion groove 19. The position where the abutting pieces 26 abut against the step surface 13d and restricting the movement of the screw-in member 25 is set as the second movement limit position P2 of the screw-in member 25. Therefore, the movement of each screw-in member 25 from the second movement limit position P2 is restricted by the abutment between the abutting pieces 26 and the step surface 13d. In this embodiment, the abutting pieces 26 of the screw-in member 25 constitute a member-side abutment portion as a movement restriction means provided for the screw-in member 25, and the step surface 13d constitutes a body-side abutment portion as a movement restriction means provided for the body 11.

8 or 9, when the screw member 25 is in the second movement limit position P2, the tip 27a of the screw hole forming portion 27 protrudes from the inner surface 14a of the mounting wall portion 14. At the second movement limit position P2, the second screw hole 25b of the screw member 25 is in a position protruding into the space 11c from the inner surface 14a of the mounting wall portion 14. At the second movement limit position P2, the first screw hole 25a of the screw member 25 is in a position of the guide hole 15 closer to the inner surface 14a of the mounting wall portion 14. When the screw member 25 is in the second movement limit position P2, the head 32 of the screw 30 is pressed against the support surface 18a of the mounting recess 18, so that the screw member 25 can be positioned to be immovable at the second movement limit position P2. The screw 30 constitutes a positioning means for positioning the screw member 25 to be immovable.

Therefore, in the box cover 10, each screw-in member 25 is assembled to the main body 11 so that its position can be changed between a first movement limit position P1 and a second movement limit position P2. Furthermore, each screw-in member 25 can be moved between two defined movement limit positions, and can be moved steplessly between the first movement limit position P1 and the second movement limit position P2. In other words, the screw-in member 25 can be moved within the range between the first movement limit position P1 and the second movement limit position P2, which are defined in two positions.

The insertion grooves 19 are provided in the mounting wall portions 14 facing the second direction Y, and the screw members 25 are inserted into the insertion grooves 19 of the mounting wall portions 14. Since second screw holes 25b are provided in each insertion groove 19, the pair of second screw holes 25b are arranged opposite each other on the main body 11 so as to sandwich the space 11c of the box cover 10. The second direction Y is the opposing direction in which the straight lines connecting the pair of second screw holes 25b extend.

In addition, at the second movement limit position P2, the screw hole forming portion 27 and the abutment piece 26 of the screw-in member 25 protrude from the inner surface 14a of the mounting wall portion 14 into the space 11c. Therefore, when the box cover 10 is viewed from the front, the space 11c is reduced by the screw-in member 25 protruding from the inner surface 14a of the mounting wall portion 14. Therefore, the screw-in member 25 itself functions as a space reducing member, and the screw hole forming portion 27 and a part of the abutment piece 26 of the screw-in member 25 function as a space reducing portion.

The distance between the pair of second screw holes 25b along the second direction Y is defined as the pitch. When the pair of screw-in members 25 are each positioned at the first movement limit position P1, the pitch between the pair of second screw holes 25b is set to 60 mm. When the pair of screw-in members 25 are each positioned at the second movement limit position P2, the pitch between the pair of second screw holes 25b is set to 40 mm.

Also, each screw member 25 takes an intermediate position between the first movement limit position P1 and the second movement limit position P2. In the intermediate position, the tip 27a of the screw hole forming portion 27 of the screw member 25 protrudes from the inner surface 14a of the mounting wall portion 14, and is located closer to the inner surface 14a than the second movement limit position P2. In the intermediate position, the second screw hole 25b of the screw member 25 protrudes into the space 11c more than the inner surface 14a of the mounting wall portion 14, and is located closer to the inner surface 14a than the second movement limit position P2. In the intermediate position, the first screw hole 25a of the screw member 25 is located in the middle of the guide hole 15 between the inner surface 14a and the outer surface 14b of the mounting wall portion 14. When the pair of screw members 25 are positioned at the intermediate positions, the pitch between the pair of second screw holes 25b is set to 50 mm.

Therefore, the pair of screw-in members 25 are assembled to the main body 11 so that the position of the second screw holes 25b can be changed to one of three set pitches. In other words, the pair of second screw holes 25b are provided in the screw-in members 25 assembled to the main body 11 so that the pitch can be changed. In addition, each pitch is maintained by positioning the screw-in members 25 so that they cannot move at the first movement limit position P1, the second movement limit position P2, or an intermediate position using the screws 30.

In addition, even in the intermediate position, the screw hole forming portion 27 and the abutment piece 26 of the screw-in member 25 protrude from the inner surface 14a of the mounting wall portion 14 into the space 11c. Therefore, when the box cover 10 is viewed from the front, the space 11c is reduced by the screw-in member 25 protruding from the inner surface 14a of the mounting wall portion 14. Therefore, the screw-in member 25 itself functions as a space reducing member, and the screw hole forming portion 27 and a part of the abutment piece 26 of the screw-in member 25 function as a space reducing portion.

As shown in FIG. 4, the box cover 10 has an indication portion 21 at a position adjacent to the guide hole 15 on the second surface 11b. The indication portion 21 is provided next to the mounting recess 18 along the first direction X. The indication portion 21 is a scale provided in a plurality of positions in the second direction Y. The indication portion 21 indicates the positions at which the screw-in member 25 is to be positioned at the first movement limit position P1, the intermediate position, and the second movement limit position P2. The indication portion 21 has a mark 21a for the first movement limit position, a mark 21b for the intermediate position, and a mark 21c for the second movement limit position. By aligning the central axis of the screw 30 with each of the marks 21a to 21c and positioning the screw-in member 25 with the screw 30, the screw-in member 25 can be positioned at the first movement limit position P1, the second movement limit position P2, or the intermediate position, and the pitch of the second screw hole 25b can be maintained at each of the positions P1 and P2.

The box cover 10 has cover mounting holes 11g at four corners. The cover mounting holes 11g penetrate the box cover 10 in the plate thickness direction.
Next, the wiring box B will be described.

As shown in FIG. 1, the wiring box B is a rectangular box with a bottom. A pair of opposing corners of the wiring box B are provided with bosses Ba that open toward the outside of the wiring box B. A female screw is formed in the bosses Ba.

Next, the wiring fixture frame 24 that holds the wiring fixture 23 in order to attach the wiring fixture 23 to the box cover 10 will be described. The wiring fixture frame 24 is made of synthetic resin or metal and has a rectangular plate shape. The wiring fixture 23 can be attached to the center of the wiring fixture frame 24. The wiring fixture frame 24 also has mounting holes 24a at both ends in the longitudinal direction.

The wiring device frame 24 is available in a variety of sizes, with a pitch between the center points of a pair of mounting holes 24a of 40 mm, 50 mm, and 60 mm. The wiring device 23 is attached to the box cover 10 via the wiring device frame 24 by screwing the mounting screw 40 that passes through the mounting hole 24a into the second screw hole 25b of the box cover 10.

Next, a method of using the box cover 10 and its function will be described.
First, a case where a wiring apparatus frame 24 having a pair of mounting holes 24a with a pitch of 60 mm is used will be described.

First, in each screw-in member 25, the central axis of the screw 30 is aligned with the first movement limit position mark 21a of the indicator 21, and as shown in FIG. 6 or FIG. 7, the screw 30 is further screwed into the first screw hole 25a while the head 32 is pressed against the support surface 18a of the mounting recess 18. Then, each screw-in member 25 is positioned so that it cannot move to the first movement limit position P1, and the pitch of the pair of second screw holes 25b is set to 60 mm.

As shown in FIG. 10, the mounting screw 28 that passes through the cover mounting hole 11g of the box cover 10 is screwed into the boss portion Ba of the wiring box B to attach the box cover 10 to the wiring box B. In this embodiment, the box cover 10 is attached to the wiring box B with the first surface 11a of the box cover 10 facing inside the wiring box B and the second surface 11b exposed to the outside. When the box cover 10 is attached to the wiring box B, the space 11c of the box cover 10 is not reduced by the screw member 25.

Next, a pair of gypsum boards Wa are erected to construct the hollow wall W, and the wiring box B is supported within the gypsum boards Wa by a support means (not shown) so that the entire second surface 11b of the box cover 10 is in close contact with the back surface of one of the gypsum boards Wa.

Next, in one of the gypsum boards Wa located on the front side of the hollow wall W, a cutting tool such as a saw (not shown) is moved along the space 11c of the box cover 10 to cut off the gypsum board Wa. At this time, the cutting tool is moved along the inner surface 13a for the pair of side wall portions 13, and is moved so as to linearly connect the recessed portion of the inner surface 14a in the second direction Y in the first direction X for the pair of mounting wall portions 14. In this way, as shown in FIG. 11, the pair of second screw holes 25b of the box cover 10 are exposed on the wall front side. As a result, the through hole Wb is formed in the gypsum board Wa, and the space 11c of the box cover 10 faces the through hole Wb, and the pair of second screw holes 25b are exposed on the wall front side through the through hole Wb.

Next, as shown in FIG. 12, the wiring fixture frame 24 holding the wiring fixture 23 is abutted against the wall surface of the gypsum board Wa, and the mounting screws 40 inserted into the mounting holes 24a of the wiring fixture frame 24 are threaded through the through holes Wb into the second screw holes 25b of the box cover 10. At this time, the pitch of the pair of mounting holes 24a of the wiring fixture frame 24 is set to 60 mm, and the pitch of the pair of second screw holes 25b of the box cover 10 is also set to 60 mm, so that the wiring fixture frame 24 is quickly fixed to the box cover 10. The wiring fixture 23 is connected to a cable K wired in the wiring box B.

Next, a case where a wiring apparatus frame 24 having a pair of mounting holes 24a with a pitch of 40 mm is used will be described.
First, in each screw-in member 25, the central axis of the screw 30 is aligned with the second movement limit position mark 21c of the indicator 21, and as shown in Figure 8 or 9, the screw 30 is further screwed into the first screw hole 25a while the head 32 is pressed against the support surface 18a of the mounting recess 18. Then, each screw-in member 25 is positioned so as to be immovable to the second movement limit position P2, and the pitch of the pair of second screw holes 25b is set to 40 mm.

Also, as shown in FIG. 13, because each screw member 25 is located at the second movement limit position P2, each screw member 25 protrudes into the space 11c of the box cover 10, narrowing the space 11c.

The mounting screw 28 that passes through the cover mounting hole 11g of the box cover 10 is screwed into the boss portion Ba of the wiring box B to attach the box cover 10 to the wiring box B. In this embodiment, the box cover 10 is attached to the wiring box B with the first surface 11a of the box cover 10 facing inside the wiring box B and the second surface 11b exposed to the outside.

Next, as shown in FIG. 14, a pair of gypsum boards Wa are erected in the same manner as above, and the wiring box B is supported within the gypsum boards Wa. Then, a cutting tool such as a saw is moved along the space 11c of the box cover 10 to cut off one of the gypsum boards Wa located on the front side of the hollow wall W. At this time, the cutting tool is moved along the inner surfaces 13a of the pair of side wall portions 13, and is moved so as to connect the pair of abutment pieces 26 of the screw-in member 25 protruding from the inner surface 14a of the mounting wall portion 14 in the first direction X. In this way, as shown in FIG. 13, a through hole Wb is formed in the gypsum board Wa, and the space 11c of the box cover 10 faces the through hole Wb, and a pair of second screw holes 25b are exposed on the front side of the wall through the through hole Wb.

At this time, since each screw member 25 protrudes into the space 11c, the through hole Wb can be made smaller than when the screw member 25 is located at the first movement limit position P1.
14, the mounting screws 40 inserted into the mounting holes 24a of the wiring apparatus frame 24 holding the wiring apparatus 23 are screwed into the second screw holes 25b of the box cover 10. At this time, the pitch of the pair of mounting holes 24a of the wiring apparatus frame 24 is set to 40 mm, and the pitch of the pair of second screw holes 25b of the box cover 10 is also set to 40 mm, so that the wiring apparatus frame 24 is quickly fixed to the box cover 10.

According to the above embodiment, the following effects can be obtained.
(1) The screw-in member 25 of the box cover 10 is configured to be movable in the second direction Y. In addition, the movement of the screw-in member 25 in the direction of coming out from the first movement limit position P1 or the second movement limit position P2 can be restricted by the abutment between the screw 30 integral with the screw-in member 25 and the box cover 10, and by the abutment between the abutment piece 26 integral with the screw-in member 25 and the box cover 10. Therefore, while restricting the screw-in member 25 from coming out from the box cover 10, the position of the second screw hole 25b provided in the screw-in member 25 can be changed, and the pitch of the pair of second screw holes 25b can be adjusted. Therefore, the position of the second screw hole 25b can be changed without changing the mounting orientation of the box cover 10 with respect to the wiring box B.

(2) The screw-in member 25 can be moved steplessly in the second direction Y between the position where the screw 30 abuts against the box cover 10 and the position where the abutment piece 26 abuts against the step surface 13d. Therefore, by adjusting the position of the screw-in member 25 along the second direction Y, the position of the second screw hole 25b can be positioned in a position suitable for mounting the wiring device frame 24.

(3) By screwing the screw 30 into the first screw hole 25a and pressing the head 32 against the support surface 18a of the mounting recess 18, the screw-in member 25 can be positioned so that it cannot move relative to the box cover 10. Therefore, the second screw hole 25b can be positioned at the position where the screw-in member 25 is positioned, and displacement of the second screw hole 25b can be suppressed. As a result, it is easy to screw the mounting screw 40 into the second screw hole 25b.

(4) When the screw-in member 25 is positioned at the second movement limit position P2 or the intermediate position, the screw-in member 25 protrudes into the space 11c, narrowing the space 11c. Then, a cutting tool is placed along the screw-in member 25 to form a through hole Wb in the gypsum board Wa, so that a through hole Wb that matches the space 11c that has been narrowed by the screw-in member 25 can be formed.

(5) An indicator 21 is provided on the second surface 11b of the box cover 10. Then, by aligning the screw 30 with the first movement limit position mark 21a, the intermediate position mark 21b, or the second movement limit position mark 21c and pressing the head 32 against the support surface 18a, the pitch between the pair of second screw holes 25b can be adjusted to a predetermined pitch. This makes the positioning of the screw-in member 25 easier than when the screw-in member 25 is positioned on the box cover 10 while measuring the pitch between the pair of second screw holes 25b.

This embodiment can be modified as follows: This embodiment and the following modifications can be combined with each other to the extent that there is no technical contradiction.
15, the screw-in member 25 may be an elongated rectangle instead of a T-shape. In this case, the guide hole 15 of the box cover 10 and the mounting recess 18 surrounding the guide hole 15 may be elongated holes. In addition, since the screw-in member 25 does not have the abutment piece 26, the step surface 13d of the box cover 10 may be omitted.

At the first movement limit position P1, the head 32 of the screw 30 screwed into the first screw hole 25a abuts against the inner surface of the mounting recess 18, which is closer to the outer surface 14b of the mounting wall 14, thereby restricting the movement of the screw-in member 25 in the direction of coming out of the box cover 10. At the second movement limit position P2, the head 32 of the screw 30 screwed into the first screw hole 25a abuts against the inner surface of the mounting recess 18, which is closer to the inner surface 14a of the mounting wall 14, thereby restricting the movement of the screw-in member 25 in the direction of coming out of the box cover 10. The screw 30 constitutes the member-side abutment of the screw-in member 25, and the inner surface of the mounting recess 18 constitutes the body-side abutment of the body 11, and the screw 30 and the inner surface of the mounting recess 18 form a movement restriction means that restricts the movement of the screw-in member 25.

As shown in FIG. 16, the guide hole 42 that exposes the first screw hole 25a of the screw-in member 25 to the outside of the box cover 10 may be a round hole through which the shaft portion 31 of the screw 30 can be inserted, and multiple round guide holes 42 may be provided in the second direction Y. In this case, it is preferable to provide the guide hole 42 so that the guide hole 42 is aligned with the first movement limit position mark 21a, the intermediate position mark 21b, and the second movement limit position mark 21c.

When the shaft 31 of the screw 30 is inserted into each guide hole 42, the shaft 31 comes into contact with the inner surface of the guide hole 42, and the screw-in member 25 with the screw 30 integrated therewith can be positioned at each position. Therefore, the position of the screw-in member 25 can be adjusted in multiple stages, and it is assembled to the main body 11 so that the pitch of the multiple set pairs of second screw holes 25b can be changed. The screw 30 and each guide hole 42 constitute a positioning means for positioning the screw-in member 25 to maintain the multiple set pitches, and the multiple guide holes 42 as positioning means are provided in multiple locations.

The indication unit 21 may be omitted.
The box cover 10 may be used by attaching it to the wiring box B with the second surface 11b facing inside the wiring box B and the first surface 11a exposed to the outside. In this case, the box cover 10 is embedded in a concrete wall together with the wiring box B. A pair of formwork frames are erected to construct the concrete wall, and the wiring box B is supported in the formwork frames by a support means (not shown) so that the abutment surface 17a of the abutment rib 17 of the box cover 10 is in close contact with the back surface of one of the formwork frames.

Next, concrete is poured into the pair of formwork, and after the concrete hardens, the pair of formwork is removed, leaving a concrete wall standing. The abutment rib 17 of the box cover 10 is exposed on the surface of the concrete wall, and a space 11c is opened inside the abutment rib 17.

○ Of the pair of second screw holes 25b in the box cover 10, one of the second screw holes 25b may be formed by a screw-in member 25 that moves so that its position can be changed relative to the box cover 10, and the other second screw hole 25b may be formed by a screw-in member 25 that is fixed to the main body 11 so that its position cannot be changed. Also, of the pair of second screw holes 25b in the box cover 10, one of the second screw holes 25b may be formed directly in the box cover 10 rather than in the screw-in member 25, and its position may not be changed.

Although both of the pair of screw-in members 25 are moved to adjust the pitch of the second screw holes 25b, the pitch of the second screw holes 25b may be adjusted by moving only one of the pair of screw-in members 25.

As shown in FIG. 17, the box cover 10 may be a large box cover 10 having a plurality of pairs of second screw holes 25b in the first direction X. In this case, the screw-in member 25 has a larger dimension in the width direction F than in the embodiment, and has a plurality of first screw holes 25a and second screw holes 25b in the width direction F as one direction. The large screw-in member 25 having a plurality of first screw holes 25a and second screw holes 25b in the width direction F may be provided on the box cover 10 so as to be slidable in the second direction Y.

The box cover 10 may be a large box cover 10 including a plurality of pairs of screw-in members 25 arranged in the first direction X.
In the box cover 10, the space reducing member and the screw-in member 25 may be separate members. In this case, the space reducing member and the screw-in member 25 are arranged to overlap in the plate thickness direction of the main body 11. With this configuration, when the space reducing member is moved without moving the screw-in member 25, only the space 11c can be reduced without moving the second screw hole 25b. Conversely, when the screw-in member 25 is moved without moving the space reducing member, only the second screw hole 25b can be moved without reducing the space 11c or while maintaining a state in which the space 11c is narrowed to a certain extent. In short, the space reducing member and the screw-in member 25 may move in conjunction with each other or independently.

○ Of the pair of screw-in members 25, one screw-in member 25 may be T-shaped as in the embodiment, and the other screw-in member 25 may be elongated and rectangular as shown in FIG. 15. In this case, in the area where the elongated and rectangular screw-in member 25 is provided, the guide hole 15 of the box cover 10 and the mounting recess 18 surrounding the guide hole 15 are elongated holes and do not have to open toward the space 11c.

In the box cover 10, the main body 11 may be C-shaped. In this case, the space 11c is formed by being surrounded by the C-shaped main body 11.
In the box cover 10, the main body 11 may be in a circular frame shape.

In the box cover 10, the shape of the space 11c may be changed as desired.
When attaching the wiring device 23 to the box cover 10, the mounting screws 40 are inserted into the mounting holes 24a of the wiring device frame 24. However, the wiring device 23 itself may have a mounting hole through which the mounting screws 40 pass.

The wiring device mounting body does not have to be the box cover 10 and may be the wiring box B.
The technical ideas that can be understood from the above-described embodiment and modified examples will be described.

[Aspect 1]
A main body is provided to surround a space in which a wiring device is disposed,
A wiring device mounting body including a pair of screw holes into which mounting screws for mounting the wiring device to the main body are screwed, and the pair of screw holes are disposed opposite to the main body so as to sandwich the space therebetween,
a plurality of pairs of screw holes arranged in one direction;
If the direction in which the straight line connecting the pair of screw holes extends is defined as the opposing direction,
At least one of the pair of screw holes is provided in a screw member that is attached to the main body so that its position along the opposing direction can be changed, and the position of the screw member can be changed within a range of two movement limit positions determined in advance,
the screw-in member has a plurality of screw holes aligned in the one direction,
a movement limiting means for limiting the movement of the screw-in member at each of the movement limit positions;
The movement restricting means is composed of a member side abutment portion provided on the screw-in member and a main body side abutment portion provided on the main body, and movement of the screw-in member is restricted by abutment between the member side abutment portion and the main body side abutment portion.

[Aspect 2]
A main body is provided to surround a space in which a wiring device is disposed,
A wiring device mounting body including a pair of screw holes into which mounting screws for mounting the wiring device to the main body are screwed, and the pair of screw holes are disposed opposite to the main body so as to sandwich the space therebetween,
If the direction in which the straight line connecting the pair of screw holes extends is defined as the opposing direction,
At least one of the pair of screw holes is provided in a screw member that is attached to the main body so that its position along the opposing direction can be changed, and the position of the screw member can be changed within a range of two movement limit positions determined in advance,
a movement limiting means for limiting the movement of the screw-in member at each of the movement limit positions;
the movement restricting means is composed of a member-side contact portion provided on the screw-in member and a body-side contact portion provided on the body, and movement of the screw-in member is restricted by contact between the member-side contact portion and the body-side contact portion,
The wiring device mounting body is characterized in that the screw-in member is infinitely movable within at least a portion of the range between the movement limit positions, and is equipped with positioning means for positioning the screw-in member so that it cannot move within the infinitely movable range.

[Aspect 3]
A main body is provided to surround a space in which a wiring device is disposed,
A wiring device mounting body including a pair of screw holes into which mounting screws for mounting the wiring device to the main body are screwed, and the pair of screw holes are disposed opposite to the main body so as to sandwich the space therebetween,
If the direction in which the straight line connecting the pair of screw holes extends is defined as the opposing direction,
At least one of the pair of screw holes is provided in a screw member that is attached to the main body so that its position along the opposing direction can be changed, and the position of the screw member can be changed within a range of two movement limit positions determined in advance,
the main body has an insertion groove that opens toward the outside on both sides in the opposing direction and into which the screw-in member is inserted, and the screw-in member is accommodated in the insertion groove so as to be movable in the opposing direction;
a movement limiting means for limiting the movement of the screw-in member at each of the movement limit positions;
The movement restricting means is composed of a member-side abutment portion provided on the screw-in member and a body-side abutment portion provided on the body, and the movement of the screw-in member is restricted by abutment between the member-side abutment portion and the body-side abutment portion, and the screw-in member is restricted from slipping out of the opening of the insertion groove.

[Aspect 4]
A main body is provided to surround a space in which a wiring device is disposed,
A wiring device mounting body including a pair of screw holes into which mounting screws for mounting the wiring device to the main body are screwed, and the pair of screw holes are disposed opposite to the main body so as to sandwich the space therebetween,
If the direction in which the straight line connecting the pair of screw holes extends is defined as an opposing direction, and the distance between the pair of screw holes along the opposing direction is defined as a pitch,
At least one of the pair of screw holes is provided in a screw-in member assembled to the main body, and the pitch can be changed,
The wiring apparatus mounting body according to claim 1, wherein the screw-in member is provided with a positioning means for positioning the screw-in member so as to maintain the pitch.

[Aspect 5]
The positioning means is a screw screwed into the screw-in member, and the screw positions the screw-in member by being screwed into the screw-in member.

[Aspect 6]
A main body is provided to surround a space in which a wiring device is disposed,
A wiring device mounting body including a pair of screw holes into which mounting screws for mounting the wiring device to the main body are screwed, and the pair of screw holes are disposed opposite to the main body so as to sandwich the space therebetween,
If the direction in which the straight line connecting the pair of screw holes extends is defined as an opposing direction, and the distance between the pair of screw holes along the opposing direction is defined as a pitch,
At least one of the pair of screw holes is provided in a screw-in member that is attached to the main body so as to be changeable to a plurality of the set pitches,
A wiring apparatus mounting body comprising positioning means for positioning the screw-in members at a plurality of locations so as to maintain the plurality of set pitches.

[Aspect 7]
A wiring apparatus mounting body, wherein the pair of screw holes are provided in the screw-in member having the same configuration.

[Aspect 8]
The wiring device mounting body is attached to a wiring box that houses wiring connected to the wiring device, the wiring box is disposed within a hollow wall having a hollow portion between a pair of wall materials, the space of the wiring device mounting body faces a through hole that penetrates one of the wall materials in the thickness direction, and the screw-in member is a wiring device mounting body having a space reducing portion that protrudes into the space and narrows the space.

[Aspect 9]
The wiring device includes a main body that surrounds a space in which the wiring device is disposed, the main body having a pair of opposing first side edges and a second side edge that connects one end of the first side edges to each other and the other end of the first side edges to each other;
A wiring device mounting body including a pair of screw holes into which mounting screws for mounting the wiring device to the main body are screwed, and the pair of screw holes are disposed opposite to the main body so as to sandwich the space therebetween,
If the direction in which the straight line connecting the pair of screw holes extends is defined as the opposing direction,
At least one of the pair of screw holes is provided in a screw member that is attached to the main body so that its position along the opposing direction can be changed, and the position of the screw member can be changed within a range of two movement limit positions determined in advance,
a movement limiting means for limiting the movement of the screw-in member at each of the movement limit positions;
the movement restricting means is constituted by a member-side contact portion provided on the screw-in member and a body-side contact portion provided on the body, and movement of the screw-in member is restricted by contact between the member-side contact portion and the body-side contact portion;
The wiring device mounting body is characterized in that the screwing member has a space reducing portion that protrudes into the space, and the space is narrowed by moving the screwing member in a direction that narrows the distance between the pair of screw holes while maintaining the shape of the second side edge of the main body that surrounds the space.

[Aspect 10]
A main body is provided to surround a space in which a wiring device is disposed,
A wiring device mounting body including a pair of screw holes into which mounting screws for mounting the wiring device to the main body are screwed, and the pair of screw holes are disposed opposite to the main body so as to sandwich the space therebetween,
If the direction in which the straight line connecting the pair of screw holes extends is defined as the opposing direction,
a space reducing member attached to the main body so as to be movable along the opposing direction without moving the screw holes,
The wiring apparatus mounting body, wherein the space is narrowed by moving the space reducing member toward the space along the opposing direction.

[Aspect 11]
A main body is provided to surround a space in which a wiring device is disposed,
A wiring device mounting body including a pair of screw holes into which mounting screws for mounting the wiring device to the main body are screwed, and the pair of screw holes are disposed opposite to the main body so as to sandwich the space therebetween,
If the direction in which the straight line connecting the pair of screw holes extends is defined as the opposing direction,
At least one of the pair of screw holes is provided in a screw member that is attached to the main body so that its position along the opposing direction can be changed, and the position of the screw member can be changed within a range of two movement limit positions determined in advance,
a movement limiting means for limiting the movement of the screw-in member at each of the movement limit positions;
the movement restricting means is constituted by a member-side contact portion provided on the screw-in member and a body-side contact portion provided on the body, and movement of the screw-in member is restricted by contact between the member-side contact portion and the body-side contact portion;
the main body includes a space reducing member attached to the main body so as to be movable independently of the screw-in member along the opposing direction,
The wiring apparatus mounting body, wherein the space is narrowed by moving the space reducing member toward the space along the opposing direction.

B...wiring box, P1...first movement limit position, P2...second movement limit position, Y...second direction as the opposing direction, W...hollow wall, Wa...gypsum board as wall material, Wb...through hole, 10...box cover as wiring device mounting body, 11...main body, 11c...space, 13d...step surface as main body side abutment, 18...mounting recess as main body side abutment, 23...wiring device, 25...screw-in member, 25b...second screw hole, 26...abutment piece as member side abutment, 30...screw as member side abutment and positioning means, 40...mounting screw.

Claims (4)

A main body is provided to surround a space in which a wiring device is disposed,
A wiring device mounting body including a pair of screw holes into which mounting screws for mounting the wiring device to the main body are screwed, and the pair of screw holes are disposed opposite to the main body so as to sandwich the space therebetween,
If the direction in which the straight line connecting the pair of screw holes extends is defined as an opposing direction, and the distance between the pair of screw holes along the opposing direction is defined as a pitch,
At least one of the pair of screw holes is provided in a screw-in member assembled to the main body, and the pitch can be changed,
The wiring apparatus mounting body according to claim 1, wherein the screw-in member is provided with a positioning means for positioning the screw-in member so as to maintain the changed pitch. The screw-in member is movable within a range of two limit positions,
a movement limiting means for limiting the movement of the screw-in member at each of the movement limit positions;
the movement restricting means is composed of a member-side contact portion provided on the screw-in member and a body-side contact portion provided on the body, and movement of the screw-in member is restricted by contact between the member-side contact portion and the body-side contact portion,
2. The wiring device mounting body according to claim 1, wherein the screw-in member is capable of being infinitely moved within at least a portion of the range between the movement limit positions, and the positioning means is a screw screwed into the screw-in member, and the screw is screwed into the screw-in member to position the screw-in member so that it cannot be moved within the infinitely movable range. The wiring device mounting body according to claim 1 or 2, wherein the pair of screw holes are provided in the screw-in members of the same configuration. The wiring device mounting body according to any one of claims 1 to 3, further comprising a space reducing portion that protrudes into the space and narrows the space.