JP5192344B2 - Screw mounting body and wiring fixture mounting body - Google Patents

Description

  The present invention has a mounting part for mounting a wiring device with a screw, and a screw mounting body accommodated in the mounting part of the wiring device mounting body in which an insertion hole through which the screw is inserted is formed on the front surface of the mounting unit, and The present invention relates to a wiring fixture mounting body in which the screw mounting body is housed in a mounting portion.

  Conventionally, a wiring box (wiring fixture mounting body) is installed on the back of the wall in order to install the wiring fixture on the wall surface of the building. Then, the wiring device is installed on the wall surface by screwing a screw (screw) for fixing the wiring device into a nut accommodated in the boss portion (attachment portion) of the wiring box. However, the screwing operation with a screw has to be done by rotating the screw with a screwdriver, and is very troublesome and time consuming. Therefore, a member in which a member (screw mounting body) made of a thin metal plate is accommodated in the boss portion instead of the nut has been proposed (for example, see Patent Document 1).

  The switch box of Patent Document 1 includes a synthetic resin box that opens to the front surface, and a box-shaped attachment portion is provided on the upper inner surface and lower inner surface of the box. Moreover, nut holes into which box screws can be inserted into the respective attachment portions are formed on the front surfaces of the upper portion and the lower portion of the box. Further, power supply line outlets communicating with the inside of the attachment portion are formed at the upper and lower portions of the box. A speed nut (screw mounting body) that can lock the box screw is accommodated in the mounting portion. The speed nut is formed with a circular hole at the center and a cut line so as to be in contact with the circular hole. Moreover, the speed nut is accommodated in the mounting portion from each power line outlet.

To install the wiring fixture on the wall using the switch box, insert the box screw attached to the mounting frame holding the wiring fixture into the nut hole and the box screw to the speed nut. Insert into the circular hole. Then, the speed nut is elastically deformed and locked to the screw portion of the box screw, and the box screw is prevented from coming out from the nut hole. As a result, the attachment frame is attached to the switch box, the wiring device is attached to the switch box, and the wiring device is installed on the wall surface.
Registered Utility Model No. 3003240

  By the way, even if the speed nut is accommodated in the mounting portion as in the switch box of Patent Document 1, it is desired to further improve the workability of the mounting work of the wiring device to the switch box. .

  An object of the present invention is to provide a screw mounting body and a wiring device mounting body that can improve the insertion property of the screw into the screw mounting body and improve the workability of mounting the wiring device to the wiring device mounting body.

In order to solve the above-mentioned problems, the invention according to claim 1 has an attachment portion for attaching the wiring device with a screw, and an insertion hole through which the screw is inserted is formed on the front surface of the attachment portion. A screw attachment body accommodated in the attachment portion of the wiring fixture attachment body, wherein the elastically deformable substrate having a plate shape is inserted into the insertion hole into which the shaft portion of the screw is inserted and the insertion hole. Further, at least a pair of elastically deformable locking claws that are locked to the shaft portion and restrict the screw from slipping out in the insertion direction with respect to the insertion hole are provided facing each other, and the pair of opposed locking claws The engaging plate includes a connecting plate portion that connects base end portions of the locking claws only on one side end side of the substrate extending along the extending direction from the substrate, and extends along the extending direction. other end of the claw has a free end, said connecting plate portion It shall be summarized in that extending along the direction perpendicular to the extending direction of the pair of latch lugs to the opposed, and notch communicating with the insertion hole is formed.

The gist of the invention according to claim 2 is that, in the screw attachment body according to claim 1, the tips of the opposed pair of locking claws are separated from each other .

According to a third aspect of the present invention, there is provided an attachment portion for attaching the wiring device with a screw, an insertion hole through which the screw is inserted is formed on a front surface of the attachment portion, and the screw is provided in the attachment portion. A wiring fixture mounting body in which a screw mounting body to be locked to the shaft portion of the screw is housed, wherein the screw mounting body includes a plate-like elastically deformable substrate, and the substrate includes a shaft portion of the screw. An insertion hole into which the screw is inserted, and at least a pair of locking claws that lock onto the shaft portion inserted into the insertion hole and restrict the screw from coming out of the insertion hole in the anti-insertion direction are provided to face each other. And a connecting plate portion that connects base ends of the locking claws only on one side end side of the substrate along the extending direction of the pair of opposing locking claws from the substrate, The other end of the locking claw extending along the extending direction is a free end. Cage, wherein the connecting plate portion, along said orthogonal direction extends with respect to the extending direction of the opposing pair of locking claws, and the gist that the notch communicating with the insertion hole is formed.

According to a fourth aspect of the present invention, in the wiring fixture mounting body according to the third aspect , the screw mounting body has the other end extending along the extending direction directed toward the internal space of the wiring fixture mounting body. The gist is that it is accommodated in the mounting portion.

  ADVANTAGE OF THE INVENTION According to this invention, the insertion property of the screw to a screw attachment body can be improved, and the attachment workability | operativity of the wiring appliance with respect to a wiring appliance attachment body can be improved.

  Hereinafter, an embodiment in which the screw attachment body of the present invention is embodied and the wiring device attachment body is embodied in a wiring box will be described with reference to FIGS. In the following description, “upper” and “lower” of the screw attachment body and the wiring box indicate the direction of the arrow Y1 shown in FIG. 1, and the “left” and “right” indicate the directions of the arrow Y2 shown in FIG. The front and rear directions are the front and rear directions of “front” and “rear”.

  As shown in FIG. 1, the wiring box 11 is formed in a bottomed square box shape that opens to the front surface (one surface). The wiring box 11 has an outer wall formed of a bottom wall 12 having a rectangular plate shape, and an upper side wall 13, a lower side wall 14, a left side wall 15, and a right side wall 16 erected from the periphery of the bottom wall 12. . Each of the upper side wall 13, the lower side wall 14, the left side wall 15, and the right side wall 16 is formed in a rectangular plate shape. An inner space N is surrounded by the bottom wall 12, the upper side wall 13, the lower side wall 14, the left side wall 15, and the right side wall 16.

  In each of the inner surfaces of the upper side wall 13 and the lower side wall 14, a mounting portion 20 having an elongated rectangular box shape is provided at the center in the left and right direction (length direction) of the upper side wall 13 and the lower side wall 14. It is integrally formed so that (length direction) extends along the left-right direction of the upper side wall 13 and the lower side wall 14. Each attachment portion 20 is formed so as to protrude from the upper side wall 13 and the lower side wall 14 toward the internal space N. As shown in FIG. 7, the attachment portion 20 is provided in the wiring box 11 in order to attach the wiring device 19 to the wiring box 11 with screws 18 as screws. The screw 18 is formed of a head portion 18a and a shaft portion 18b having a screw formed on the outer surface.

  As shown in FIG. 1, the mounting portion 20 is formed so that the front surface (one surface) of the mounting portion 20 is flush with the opening ends of the upper side wall 13 and the lower side wall 14. Further, in the attachment portion 20, an insertion hole through which the screw 18 can be inserted from the front surface of the attachment portion 20 is inserted into the wall portion 20 a located on the front side of the attachment portion 20 in the insertion direction of the screw 18 (shown by an arrow X in FIG. 2). 21 is formed, and the shaft portion 18 b of the screw 18 can be inserted into the mounting portion 20 from the insertion hole 21. In the wall portion 20a, through holes 23 are formed on the left and right sides of the insertion hole 21 so as to penetrate the wall portion 20a in the front-rear direction (thickness direction).

  As shown in FIG. 2, in the insertion direction of the screw 18 into the attachment portion 20, a through-hole through which the shaft portion 18 b of the screw 18 can pass is formed in the wall portion 20 b of the attachment portion 20 located on the back side from the insertion hole 21. 22 is formed. The insertion hole 21 and the through hole 22 are formed at positions facing each other in the thickness direction of the mounting portion 20 (the insertion direction of the screw 18).

  A housing space 30 is formed inside each mounting portion 20, and a screw mounting body 40 capable of locking the shaft portion 18 b of the screw 18 is housed in the housing space 30. As shown in FIGS. 1 and 3, the screw attachment body 40 is formed by forming a thin metal plate having a rectangular shape in a plan view into a predetermined shape. The screw attachment body 40 includes a substrate 41 that forms an outline of the screw attachment body 40, and the substrate 41 is formed to be curved in an arc shape in an initial state. Further, the substrate 41 is formed so as to be able to bend and deform as a whole by pressing with the screw 18, and the substrate 41 is formed to be elastically deformable so as to return to the original shape before being deformed after being bent and deformed.

  A pair of locking claws 42 is formed on the substrate 41. Each locking claw 42 is formed by cutting out a metal plate forming the screw attachment body 40 into a predetermined shape, and further curving the entire substrate 41 other than the locking claw 42 in an arc shape so that the front end side of the locking claw 42 is the substrate 41. It is formed so as to protrude from. That is, as shown in FIG. 2, the front end side of the locking claw 42 protrudes from the surface of the substrate 41 on the side that bulges in an arc shape. Further, the pair of locking claws 42 are extended from the substrate 41 so as to face each other with their tips separated from each other.

  Each of the locking claws 42 has a required strength and is formed so as to be able to be bent and deformed by pressing with the screw 18 and can be elastically deformed so as to return to its original shape before being deformed after being bent and deformed. Is formed. 3, the length of the locking claw 42 along the extending direction of the locking claw 42 from the substrate 41 (long side direction of the substrate 41) (the length from the proximal end to the distal end of the locking claw 42). And the length from the proximal end of the locking claw 42 to the distal end of the substrate 41 is the same.

  Each end of each locking claw 42 is cut out in an arc shape, and an insertion hole 43 having a circular hole shape is formed by the cutout portions facing each other. The diameter of the insertion hole 43 is slightly smaller than the diameter of the shaft 18 b of the screw 18. In the substrate 41, one side end side (the upper end side in FIG. 3) extending along the extending direction of the pair of opposing locking claws 42 is a connecting plate portion 41 a that connects the base end portions of the locking claws 42. It has become. Further, the connecting plate portion 41 a is not provided on the other side end side (the lower side end side in FIG. 3) of the pair of locking claws 42 extending along the extending direction. Is the free end. A cutout 44 extending along a direction orthogonal to the extending direction of the locking claw 42 is formed at the center portion of the connecting plate portion 41 a in the extending direction of the locking claw 42 in the substrate 41 so as to be continuous with the insertion hole 43. Has been.

  The substrate 41 is formed to be able to bend and deform in order to widen the distance between the tips of the pair of locking claws 42 when the screw 18 is inserted into the insertion hole 43. The length L1 of the locking claw 42 along the direction orthogonal to the extending direction of the locking claw 42 and the length L2 of the connecting plate portion 41a along the orthogonal direction are the same. And the board | substrate 41 is elastically deformable by ensuring only the predetermined length L2 of the connection board part 41a.

  As shown in FIG. 2, the screw attachment body 40 configured as described above is accommodated in the accommodation space 30 of the attachment portion 20 so that the insertion hole 43 faces the insertion hole 21 of the attachment portion 20. The accommodation space 30 is positioned on the back side of the first accommodation space 31 in the insertion direction of the screw 18 and the first accommodation space 31 formed wider on the near side along the insertion direction of the screw 18 to the mounting portion 20. And the second storage space 32 formed narrower than the first storage space 31.

  Further, a step 33 is formed on the inner surface of the attachment portion 20 and at the boundary between the first accommodation space 31 and the second accommodation space 32. The opening width of the first accommodation space 31 along the left-right direction (the length direction and the direction perpendicular to the insertion direction of the screw 18) of the mounting portion 20 is along the long side direction of the substrate 41 in the initial state of being curved in an arc shape. The gap is formed between both ends of the long side direction of the substrate 41 and the inner surface of the mounting portion 20. Further, the opening width of the first accommodation space 31 along the insertion direction of the screw 18 into the mounting portion 20 is formed to be narrower than the entire length in the thickness direction of the substrate 41 in the initial state. For this reason, the entire substrate 41 is accommodated in the accommodation space 30 using the first accommodation space 31 and the second accommodation space 32 communicating with the first accommodation space 31. That is, the screw attachment body 40 is accommodated in the accommodation space 30 in a curved state so that the insertion holes 43 are located on the back side in the insertion direction of the screw 18 from both ends in the long side direction of the substrate 41.

  Further, in the substrate 41, the surface on the back side in the insertion direction of the screw 18 can come into contact with the step 33, and the surface on the near side in the insertion direction of the screw 18 in the substrate 41 contacts the inner surface of the wall portion 20a. It is possible. The opening width along the insertion direction of the screw 18 in the second accommodation space 32 is such that the substrate 41 is bent and deformed as the screw 18 is inserted into the insertion hole 43 in a state where the substrate 41 is supported by the step 33, and locked. The length is set to allow the claw 42 to bend and deform.

  Further, when the substrate 41 is in contact with and supported by the step 33, a gap is formed between the substrate 41 and the inner surface of the wall portion 20a in the insertion direction of the screw 18. In addition, in the accommodation space 30, the screw attachment body 40 is disposed so that the central portion in the long side direction of the substrate 41 bulges toward the second accommodation space 32, and the substrate 41 extends to the step 33. Except for the contact part, it does not contact the inner surface of the mounting portion 20. For this reason, the board | substrate 41 is accommodated with the backlash so that bending deformation is accept | permitted within the 1st accommodating space 31 and the 2nd accommodating space 32. FIG.

  Further, in a state where both end sides (both ends in the long side direction of the substrate 41) that are the base end side of the locking claw 42 in the substrate 41 are in contact with and supported by the step 33, the locking claw 42 is removed from the first accommodation space 31. It extends obliquely toward the second accommodation space 32. And in the 2nd storage space 32, the movement (deflection deformation | transformation) of the latching claw 42 is accept | permitted.

  As shown in FIG. 4, the attachment portion 20 is formed with a communication hole 36 that allows communication between the outside of the attachment portion 20 and the accommodation space 30. The communication hole 36 opens to a surface (upper surface in the upper mounting portion 20 and lower surface in the lower mounting portion 20) perpendicular to the front surface of the mounting portion 20 in which the insertion hole 21 is formed. And it opens to the lower side wall 14. The opening width on the outer surface side of the upper wall 13 or the lower wall 14 in the communication hole 36 along the insertion direction of the screw 18 is formed wider than the opening width on the accommodation space 30 side along the insertion direction.

  In addition, the attachment portion 20 is formed with an inclined surface 20 c that gradually inclines from the opening toward the outside of the attachment portion 20 toward the accommodation space 30. For this reason, the opening width of the communication hole 36 along the insertion direction of the screw 18 is formed so as to be gradually narrowed from the opening toward the outside of the mounting portion 20 toward the accommodation space 30. And the step part 20d orthogonal to the inner surface of the wall part 20b is formed by the inner surface of the wall part 20b in which the through-hole 22 was formed, and the inner surface of the attachment part 20 which continues to the inclined surface 20c. As shown in FIG. 4, in the mounting portion 20, a step portion 20 d that is a boundary between the communication hole 36 and the accommodation space 30 is a part of the substrate 41 accommodated in the accommodation space 30 in a curved state. The central part 41b in the long side direction is engaged.

  The housing space 30 is formed by using a punching die when the wiring box 11 is molded, and the communication hole 36 and the through hole 23 are formed in the mounting portion 20 by removing the punching die. Further, the step portion 20 d of the accommodation space 30 is formed in the attachment portion 20 by removing the punching die from the through hole 23.

  As shown in FIG. 5, the screw attachment body 40 is inserted into the accommodation space 30 through the communication hole 36. For this reason, the insertion direction of the screw attachment body 40 into the attachment portion 20 is different from the insertion direction of the screw 18 into the attachment portion 20 and is orthogonal to each other. The screw attachment body 40 is accommodated in the attachment portion 20 (accommodation space 30) with the other end extending along the extending direction of the locking claws 42 facing the internal space N. And a pair of screw attachment body 40 is accommodated in the attachment part 20 so that the other side end of each other may oppose on both sides of the internal space N. Then, the screw attachment body 40 is inserted into the communication hole 36, and the screw attachment body 40 is pushed toward the accommodation space 30. At this time, since the opening width of the communication hole 36 is gradually narrowed by the inclined surface 20c, the substrate 41 curved in an arc shape gradually deforms into a flat plate shape, and passes through the communication hole 36 in the deformed state. And accommodated in the accommodating space 30.

  As shown in FIG. 4, when the substrate 41 returns to the original shape in the accommodation space 30, the substrate 41 is accommodated in the accommodation space 30 in an arcuate initial state. Further, in the mounting portion 20, an inner surface forming the accommodation space 30, and a stepped portion 20 d connected to the inclined surface 20 c is accommodated in the accommodation space 30 and returned to the original shape in the long side direction of the substrate 41. The center portion 41b of the screw is engaged, and the screw attachment body 40 is prevented from coming out of the housing space 30.

  In order to attach the wiring device 19 to the wiring box 11 having the above configuration, first, the wiring box 11 is fixed to the pillar H as shown in FIG. At this time, the wiring box 11 is fixed to the column H such that the mounting portion 20 is positioned vertically, but the upper and lower screw mounting bodies 40 are housed in a curved state in the housing space 30 and the curved shape thereof. The central portion 41b in the long side direction of the substrate 41 can be engaged with the step portion 20d. For this reason, the screw attachment body 40 is prevented from passing through the communication hole 36, and the screw attachment body 40 is prevented from coming out of the attachment portion 20. In particular, in the lower attachment portion 20, the screw attachment body 40 in the accommodation space 30 is prevented from dropping through the communication hole 36.

  Next, a pair of wall members W are erected so as to sandwich the wiring box 11 from the front and rear, and a wall hole Wa is formed in the front wall member W so that the internal space N of the wiring box 11 faces the wall front side. I will. Next, the wiring device 19 is held by the wiring device holding frame 50. Subsequently, each of the pair of screws 18 penetrating the wiring device holding frame 50 is inserted into the insertion holes 21 of the mounting portions 20. Then, as shown in FIG. 6, the screw 18 is pushed into the attachment portion 20 and the screw 18 is inserted into the insertion hole 43 of the screw attachment body 40.

  At this time, each of the locking claws 42 extends obliquely from the front side in the insertion direction of the screw 18 toward the back side. For this reason, when the tip ends of both locking claws 42 are pressed toward the second housing space 32 by the shaft portion 18b, the locking claws 42 move (bend and deform) in the second housing space 32, and the screws are attached. In the body 40, both end sides (both sides in the long side direction of the substrate 41) that are the base end sides of the locking claws 42 in the substrate 41 are supported by the step 33.

  Further, when the screw 18 is pushed into the insertion hole 43, as shown by a two-dot chain line in FIG. 6, the locking claw 42 is pressed by the shaft portion 18b, whereby the entire substrate 41 is bent and deformed. That is, the substrate 41 is deformed so that the curvature of the substrate 41 is smaller than the curvature before movement (before bending deformation) so that the tips of the pair of locking claws 42 are separated from each other and the shaft portion 18b is allowed to enter. To do. At this time, since the other end of the locking claw 42 is a free end in the substrate 41, when the substrate 41 is pressed by the screw 18, the other side portion of the substrate 41 expands the insertion hole 43. It is easy to deform in the direction.

  In addition, at both ends in the length direction of the first storage space 31, bending deformation in the anti-insertion direction of both ends of the base 41 on the base end side of the locking claw 42 is allowed, and in the second storage space 32, A bending deformation in the insertion direction of the central portion of the substrate 41 is allowed. That is, the entire deformation of the substrate 41 is allowed by the first accommodation space 31 and the second accommodation space 32. At the same time, movement (flexure deformation) of the locking claw 42 is allowed by the second storage space 32.

  After that, when the locking claw 42 that has been bent and deformed returns to its original shape by elastic deformation, the tip of the locking claw 42 is locked to the shaft portion 18b. When the pressing of the screw 18 against the screw attachment body 40 is stopped, the substrate 41 that has been bent and deformed returns to the original shape (initial state) by elastic deformation. At this time, the first accommodating space 31 and the second accommodating space 32 allow deformation for returning the entire substrate 41 to the original shape. Moreover, since the other side end along the extending direction of the latching claw 42 is a free end, the substrate 41 is quickly returned to the original shape.

  Then, after the locking claw 42 is locked to the shaft portion 18b, the screw 18 is slightly screwed (tightened) to the screw mounting body 40 in order to mount the wiring device holding frame 50 to the mounting portion 20. At this time, the screw attachment body 40 is pulled toward the insertion hole 21 side, and the surface on the near side in the insertion direction of the substrate 41 is in contact with the inner surface of the wall portion 20a, so that it is elastically deformed from an arc-curved state to an uncurved plate shape. To do. Here, in the substrate 41, the connecting plate portion 41a has a sufficient length L2, so that even if the substrate 41 is elastically deformed into a flat plate shape, the locking claw 42 expands the diameter of the insertion hole 43. Spreading is regulated.

  Further, when the substrate 41 abuts against the wall portion 20 a and is elastically deformed into a flat plate shape, both ends in the long side direction of the substrate 41 abut on the inner surface of the mounting portion 20. For this reason, in addition to restricting the diameter of the locking claw 42 due to the length L2 of the connecting plate portion 41a, the locking claw 42 expands the insertion hole 43 by contact with both ends of the substrate 41. The deformation of the substrate 41 is restricted. In the present embodiment, the coupling plate portion 41a of the substrate 41 has a length L2, and the both ends of the substrate 41 deformed into a flat plate form contact with the inner surface of the mounting portion 20 due to two factors. The diameter of the claw 42 is restricted. However, when the board 41 abuts against the wall portion 20a by the tightening of the screws 18 and is elastically deformed into a flat plate shape, the connecting plate portion can be obtained even if both ends in the long side direction of the substrate 41 do not abut against the inner surface of the mounting portion 20. Since 41a has length L2, the diameter expansion of the latching claw 42 can be controlled.

As a result, the wiring device 19 is attached to the wiring box 11 using the screws 18.
According to the above embodiment, the following effects can be obtained.
(1) In the board 41 of the screw attachment body 40, a connecting plate portion 41a for connecting the base end portions of the locking claws 42 is provided only on one side end side extending along the extending direction of the locking claws 42. . Further, the other end extending along the extending direction of the locking claw 42 was defined as a free end. For this reason, when the screw 18 is inserted into the insertion hole 43, for example, the substrate 41 is less than the case where the connecting plate portions 41a are provided on both side portions extending along the extending direction of the locking claws 42, respectively. It becomes easy to bend and deform. Therefore, the resistance of the substrate 41 when inserting the screw 18 into the insertion hole 43 can be reduced, and the workability of inserting the screw 18 into the screw attachment body 40 can be improved. As a result, it is possible to improve the insertability of the screw 18 into the attachment portion 20 and improve the workability of attaching the wiring device 19 to the wiring box 11.

  (2) The front ends of the pair of opposing locking claws 42 are separated from each other, and the other end along the extending direction of the locking claws 42 is a free end. For this reason, when the screw 18 is inserted into the insertion hole 43, the distance between the tips of the pair of locking claws 42 is difficult to spread on the connecting plate portion 41a side, and the other end side of the locking claws 42 is easily widened. ing. Therefore, the board | substrate 41 spreads diagonally so that the other side end side of the board | substrate 41 may spread as a whole. Therefore, the resistance of the substrate 41 when the screw 18 is inserted into the insertion hole 43 can be reduced, and the workability of the screw 18 insertion work can be improved.

  (3) As for the screw attachment body 40, while the connection board part 41a is provided only in the one side end side of a pair of latching claw 42, the other side end of the latching claw 42 is a free end. The length L1 of the locking claw 42 along the direction orthogonal to the extending direction of the locking claw 42 and the length L2 of the connecting plate portion 41a are the same. That is, by making the other side end of the locking claw 42 a free end, the substrate 41 can be easily bent and deformed, while the length L2 of the connecting plate portion 41a is sufficiently secured. Thereby, the elastically deformed substrate 41 can be returned to the original shape. Therefore, while the screw 18 can be easily inserted into the insertion hole 43, the substrate 41 is surely returned to the original shape, and the locking claw 42 is locked to the shaft portion 18b, so that the screw 18 can be removed from the insertion hole 43. Can be prevented.

  (4) A cutout 44 is formed in the connecting plate portion 41a. For this reason, the engaging claw 42 is connected by the connecting plate portion 41a, and the connecting plate portion 41a enables the return to the original shape of the substrate 41, while the cutout 44 is formed in the connecting plate portion 41a. The bending deformation of the plate portion 41a is facilitated.

  (5) While the screw attachment body 40 includes a connecting plate portion 41a that connects the base ends of the pair of locking claws 42, the other end of the locking claws 42 is a free end. That is, the connecting plate portion 41 a is formed only on one side end side with the latching claws 42 sandwiched in the direction orthogonal to the extending direction of the pair of latching claws 42. The screw attachment body 40 is accommodated in the attachment portion 20 with the other end of the locking claw 42 facing the internal space N. Therefore, the attachment part 20 should just be formed so that the screw attachment body 40 accommodated in the accommodation space 30 can be accommodated so that the insertion hole 43 faces the insertion hole 21 of the attachment part 20. Accordingly, in the mounting portion 20, the protruding length into the wiring box 11 on the inner space N side from the insertion hole 21 can be shortened, and the size of the wiring device 19 that can be accommodated in the wiring box 11 is increased. can do.

  (6) The wiring box 11 includes a pair of mounting portions 20 for mounting the wiring device 19 via the wiring device holding frame 50. And the screw attachment body 40 which exhibits the effect as described in said (1)-(4) is accommodated in the attaching part 20. As shown in FIG. Therefore, the screw 18 can be easily inserted into the mounting portion 20 of the wiring box 11, and the wiring tool 19 can be easily attached to the wiring box 11.

In addition, you may change the said embodiment as follows.
○ As the wiring fixture attachment body, the screw attachment body 40 of the present embodiment is accommodated in the attachment portion of the box cover formed in a square frame shape and projecting toward the internal space in the frame. Also good.

In the embodiment, a bolt or a wood screw may be used instead of the screw 18 as a screw.
The board 41 in the screw attachment body 40 may be formed in an elliptical shape or an elongated disk shape in plan view.

In the embodiment, three or four or more locking claws 42 in the screw attachment body 40 may be formed.
Next, the technical idea that can be grasped from the above embodiment and other examples will be described below.

(1) the engagement with the length of the locking claw along the direction perpendicular to the extending direction of the claws, to claim 1 or claim 2 which is the same as the length of the connecting plate portion along the perpendicular direction The screw mounting body described.

The perspective view which shows the box for wiring and screw attachment body of embodiment. The cross-sectional view which shows the inside of an attaching part. The front view which shows a screw attachment body. The partial expanded longitudinal cross-sectional view which shows the inside of an attaching part. The partial top view which shows the inside of an attaching part. The partial expanded plane sectional view which shows the state which penetrated the screw | thread through the screw attachment body. The longitudinal cross-sectional view which shows the state which attached the wiring fixture to the box for wiring.

Explanation of symbols

  N ... Internal space, 11 ... Wiring box as a wiring fixture mounting body, 18 ... Screw as screw, 18b ... Shaft, 19 ... Wiring fixture, 20 ... Mounting portion, 21 ... Insertion hole, 40 ... Screw mounting body, 41 ... board, 41a ... coupling plate part, 42 ... locking claw, 43 ... insertion hole, 44 ... notch.

Claims (4)

A screw attachment body accommodated in the attachment portion of the wiring appliance attachment body having an attachment portion for attaching the wiring appliance by a screw and having an insertion hole through which the screw is inserted on the front surface of the attachment portion. ,
An elastically deformable substrate having a plate shape includes an insertion hole into which the shaft portion of the screw is inserted, and an anti-insertion direction of the screw with respect to the insertion hole by being engaged with the shaft portion inserted into the insertion hole. At least a pair of elastically deformable locking claws that regulate the slipping out of the
A connecting plate portion for connecting base ends of the locking claws to only one side end side of the substrate extending along the extending direction of the pair of opposing locking claws from the substrate is provided. The other side end of the locking claw extending along the installation direction is a free end, and the connecting plate portion extends in a direction orthogonal to the extending direction of the pair of opposing locking claws, and A screw attachment body in which a notch continuous to the insertion hole is formed .   The screw attachment body according to claim 1, wherein tips of the opposing pair of locking claws are separated from each other. A screw mounting having a mounting portion for mounting the wiring device with a screw, and an insertion hole through which the screw is inserted is formed on the front surface of the mounting portion, and the shaft portion of the screw is locked in the mounting portion. A wiring fixture mounting body containing the body,
The screw attachment body includes an elastically deformable board having a plate shape, and the board is locked to an insertion hole into which the shaft part of the screw is inserted, and the shaft part inserted into the insertion hole. And at least a pair of locking claws for restricting the screw from slipping out of the insertion hole in the anti-insertion direction are provided to face each other, and the pair of opposed locking claws extend along the extending direction from the substrate. A connecting plate portion for connecting the base end portions of the locking claws to only one side end side of the substrate is provided, and the other side end of the locking claws extending along the extending direction is a free end. The connecting plate portion is formed with a notch that extends along a direction orthogonal to the extending direction of the pair of opposing locking claws and that is continuous with the insertion hole. . The wiring according to claim 3, wherein the screw attachment body is accommodated in the attachment portion with the other end of the locking claw extending along the extending direction facing the internal space of the wiring fixture attachment body. Instrument mounting body.

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