JP5080366B2 - Structure of screw body mounting portion and wiring device mounting body - Google Patents

Description

  The present invention provides a wiring fixture mounting body for attaching a wiring fixture to a frame-like or box-shaped wiring fixture mounting body by a screw body, and an insertion hole through which the screw body can be inserted is formed on the front surface and the screw. The present invention relates to a structure of a screw body mounting portion in which a plate-like screw body locking member that locks to a shaft portion of the body is housed, and a wiring device mounting body including the screw body 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 body) for fixing the wiring device into a nut housed in the boss portion (screw body mounting 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 wiring box is proposed in which a member made of a thin metal plate is accommodated in the boss portion instead of the nut (see Patent Document 1 and Patent Document 2).

  The wiring box disclosed in Patent Document 1 includes a peripheral wall that surrounds an internal space, and a pair of boss portions that are located on the inner surface side of the peripheral wall. The boss part has an insertion hole into which a screw for attaching the wiring device is inserted, and the boss part is provided with an elastic engagement piece and a receiving surface. The elastic engagement piece is located on the outer side opposite to the inner space side with respect to the insertion hole, extends toward the insertion hole, and the tip is attached to the screw shaft portion inserted into the insertion hole. Engage. On the other hand, the receiving surface is positioned on the inner side which is the inner space side with respect to the insertion hole, and receives the screw shaft portion pressed by the elastic engagement piece.

  When attaching the wiring device to the wiring box, the elastic engagement piece is elastically deformed so as to be inclined in the insertion direction of the screw shaft portion with respect to the insertion of the screw shaft portion into the insertion hole. Is allowed to move in the insertion direction. When the insertion of the screw is finished, the tip of the elastic engagement piece is engaged with the screw shaft portion, and the wiring device is attached to the wiring box. On the other hand, when the screw shaft part comes out of the insertion hole, the elastic engagement piece engaged with the screw shaft part presses the screw shaft part against the receiving surface in an attempt to elastically deform in the direction in which the screw shaft part comes off. Thus, it is difficult to elastically deform the elastic engagement piece in the removal direction, and the movement of the screw shaft portion in the removal direction is prevented.

  Moreover, the wiring box of Patent Document 2 includes a box body having an opening on the front surface, and a fixing portion for fixing the wiring device to the box body from the front side using screws. The fixed portion has a first engaging piece and a second engaging piece that face each other. Each of the first and second engaging pieces is provided with an engaging portion that engages with a screw thread. Further, the first and second engagement pieces are elastically deformable, and are formed so that the spring constant of the first engagement piece is relatively large and the spring constant of the second engagement piece is relatively small. Yes.

Then, when attaching the wiring device to the wiring box, the fixing part is pressed so as to push the screw from the front side. Then, the engaging portions provided on the first and second engaging pieces are pressed against the screw shafts, and the second engaging pieces or the first and second engaging pieces are elastically deformed, and The joint part is detached from the shaft part, and the shaft part enters the fixed part. When the screw is pushed in, the engaging portion engages with the screw shaft, and the wiring device is fixedly attached to the wiring box.
JP 2006-177377 A JP 2005-12877 A

  However, in the wiring box of Patent Document 1, when the elastic force of the elastic engagement piece is weakened to facilitate the insertion of the screw shaft part into the insertion hole, the elastic engagement piece is engaged with the screw shaft part. This is not preferable because the restricting force to the screw shaft portion from coming off is weakened. Conversely, if the elastic force of the elastic engagement piece is increased in order to increase the restricting force to the screw shaft portion to come off, the resistance by the elastic engagement piece when the screw shaft portion is inserted into the insertion hole is increased, This is not preferable because it makes it difficult to attach the screw to the boss. Also in the wiring box of Patent Document 2, if the elastic force of the first and second engagement pieces is weakened to facilitate the insertion of the screw into the fixed portion, the engagement of the first and second engagement pieces is reduced. This is not preferable because the restricting force to the disconnection from the state where the joint portion is engaged with the shaft portion of the screw is weakened. On the contrary, if the elastic force of the first and second engagement pieces is increased in order to increase the restricting force to the screw withdrawal, the resistance by each engagement piece at the time of inserting the screw into the fixed portion increases. This is not preferable because it makes it difficult to attach the screw to the fixed portion.

  The present invention can facilitate the mounting operation of the screw body to the screw body mounting portion, and can also improve the force of restricting the screw body from coming out of the screw body mounting portion, and the structure of the screw body mounting portion. It is providing the wiring fixture attachment body provided with this screw body attachment part.

In order to solve the above-mentioned problem, the invention according to claim 1 is provided in the wiring device mounting body for mounting the wiring device by a screw body to the frame or box-shaped wiring device mounting body, A structure of a screw body mounting portion in which an insertion hole into which a screw body can be inserted is formed on the front surface and a plate-like screw body locking member that locks to a shaft portion of the screw body is housed therein, An insertion hole into which the screw body is inserted is formed in a substrate of the screw body locking member, and the screw of the screw body is locked by being engaged with the shaft portion inserted into the screw body mounting portion from the insertion hole. At least a pair of engaging claws extending from the substrate so that the tips are opposed to each other and are directed toward the insertion direction of the screw body so as to restrict the withdrawal from the body attachment portion in the anti-insertion direction, and further, the substrate The screw body is inserted into the insertion hole. And is formed so as to be able to bend and deform so as to widen the gap between the tips of the locking claws, and in the screw body mounting portion, the insertion hole of the screw body locking member faces the insertion hole. An accommodation space for supporting and accommodating the screw body locking member is formed, and a locking claw movement space in which the locking claw moves when the screw body is inserted into the insertion hole, and the screw body And a board deformation allowing space for allowing the board to bend and deform as a result of the insertion, a guide protrusion is provided at the tip of the shaft portion of the screw body, and the accommodation space is provided at the screw body mounting portion. A guide hole is formed at a position opposite to the insertion hole across the insertion hole, and the interval between the insertion hole and the guide hole along the insertion direction of the screw body is set to be shorter than the length of the guide protrusion. The gist.

The invention according to claim 2 is provided in the wiring device mounting body for mounting the wiring device to the frame or box-shaped wiring device mounting body by a screw body, and an insertion hole through which the screw body can be inserted. A plate-like screw body locking member that is formed on the front surface and that locks on the shaft portion of the screw body is housed therein, and includes a board of the screw body locking member. An insertion hole into which the screw body is inserted is formed, and the shaft body inserted into the screw body mounting portion from the insertion hole is engaged with the screw body in a direction opposite to the insertion direction from the screw body mounting portion. At least a pair of locking claws extending from the substrate so that the tips are opposed to each other and are directed in the insertion direction of the screw body to restrict the slippage of the screw body, and the screw body is inserted into the insertion hole. When inserted, the tip of the locking claw In order to assist the bending deformation of the substrate at a position sandwiching the insertion hole in a direction perpendicular to the extending direction of the pair of engaging claws facing each other in the substrate. A deformation assisting portion formed by cutting out the substrate is formed on the screw body mounting portion, and the screw body locking member is formed on the screw body mounting portion so that the insertion hole of the screw body locking member faces the insertion hole. A holding space for supporting and holding the locking claw movement space in which the locking claw moves when the screw body is inserted into the insertion hole, and the substrate along with the insertion of the screw body The gist of the present invention is that a board deformation allowing space that allows bending deformation of the board is provided .

The wiring device mounting body according to claim 3 is a plate-like shape in which an insertion hole through which the screw body can be inserted is formed on the front surface and the shaft is locked to the shaft portion of the screw body in order to attach the wiring device by the screw body. A wiring device attachment body having a frame shape or a box shape having a pair of screw body attachment portions in which screw body locking members are accommodated facing each other, wherein the screw body attachment portion is as claimed in claim 1 or 2. The gist is provided with the screw body mounting portion described above .

  ADVANTAGE OF THE INVENTION According to this invention, while being able to facilitate the attachment operation | work to the screw body attaching part of a screw body, the pulling-out control force from the screw body attaching part of a screw body can be improved.

(First embodiment)
A first embodiment in which the present invention is embodied in the structure of a screw body mounting portion of a wiring box will be described below with reference to FIGS. In the following description, “upper” and “lower” of the wiring box have the direction of the arrow Y1 shown in FIG. 1 as the vertical direction, and “left” and “right” have the direction of the arrow Y2 shown in FIG. In “front” and “rear”, the direction of the arrow Y3 shown in FIG.

  As shown in FIG. 1, a wiring box 11 as a wiring fixture mounting body is formed in a bottomed square box shape that opens to the front surface. The wiring box 11 includes 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 as side walls standing from the periphery of the bottom wall 12. Yes. 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.

  On the inner surface of each of the upper side wall 13 and the lower side wall 14, a screw body mounting portion 20 having an elongated rectangular box shape is provided at the center in the length direction of the upper side wall 13 and the lower side wall 14. It is integrally formed so that a direction may extend along the length direction of the upper side wall 13 and the lower side wall 14. As shown in FIG. 6, the screw body attaching 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 screw bodies. The screw 18 is formed of a head portion 18a, a shaft portion 18b having a screw formed on the outer surface, and a guide protrusion 18c extending in a columnar shape provided at the tip of the shaft portion 18b. The diameter of the guide protrusion 18c is smaller than the diameter of the shaft portion 18b.

  As shown in FIG. 1, the screw body mounting portion 20 is formed so as to be elongated in the length direction (left-right direction) of the upper side wall 13 and the lower side wall 14. The screw body mounting portion 20 is formed so that the front surface of the screw body mounting portion 20 is flush with the open ends of the upper side wall 13 and the lower side wall 14. Further, in the screw body mounting portion 20, an insertion hole 21 through which the screw 18 can be inserted from the front surface of the screw body mounting portion 20 is formed in the wall portion 20 a located on the front side in the insertion direction of the screw 18. The shaft portion 18b and the guide projection 18c of the screw 18 can be inserted into the screw body mounting portion 20 from the hole 21.

  As shown in FIG. 2, in the insertion direction (indicated by arrow X) of the screw 18 into the screw body mounting portion 20, a screw 18 is provided on the wall portion 20 b of the screw body mounting portion 20 located on the back side from the insertion hole 21. A guide hole 22 into which the shaft portion 18b and the guide projection 18c can be inserted is formed. The insertion hole 21 and the guide hole 22 are formed at positions facing each other in the thickness direction of the screw body mounting portion 20 (insertion direction of the screw 18). The interval between the insertion hole 21 and the guide hole 22 (the interval between the wall portion 20a and the wall portion 20b) along the insertion direction of the screw 18 is shorter than the length along the axial direction of the guide protrusion 18c. For this reason, the guide protrusion 18 c can be inserted into the guide hole 22 while the shaft portion 18 b of the screw 18 is positioned in the insertion hole 21.

  A housing space 30 is formed inside each screw body mounting portion 20, and a screw body locking member 40 capable of locking the shaft portion 18 b of the screw 18 is housed in the housing space 30. As shown in FIG. 1, the screw body locking member 40 is formed by molding a thin metal plate having a rectangular plate shape into a predetermined shape. The screw body locking member 40 includes a square plate-like substrate 41 that forms an outline of the screw body locking member 40, and the substrate 41 is formed to be curved like a bow 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.

  The substrate 41 is formed with a pair of locking claws 42 that extend from both long sides of the substrate 41 toward the center of the substrate 41. Each locking claw 42 is formed by cutting out a metal plate forming the screw body locking member 40 into a predetermined shape, and further bending the entire substrate 41 other than the locking claw 42 in a bow shape along the long side direction. The front end of the pawl 42 is formed so as to protrude from the substrate 41. 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 that their tips are opposed to each other. And each latching claw 42 is formed so that it may extend along the tangent F (shown with the dashed-two dotted line of FIG. 2) of the board | substrate 41 which curves like a bow.

  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. The length of the locking claw 42 along the extending direction of the locking claw 42 from the substrate 41 (the length from the proximal end to the distal end of the locking claw 42), and the base 41 from the proximal end of the locking claw 42 The length to the tip is the same.

  As shown in FIG. 1, the distal ends of the respective locking claws 42 are notched in an arc shape, and an insertion hole 43 having a circular hole shape is formed by facing the notched portions. 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, a notch serving as a deformation assisting portion for assisting the bending deformation of the substrate 41 is provided at a position sandwiching the insertion hole 43 in the short side direction orthogonal to the extending direction of the locking claw 42 (long side direction of the substrate 41). A portion 44 is formed. The notch 44 is formed by notching each of both side portions 41a of the substrate 41 at a position sandwiching the insertion hole 43 in the radial direction. 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.

  As shown in FIG. 2, the screw body locking member 40 having the above-described configuration is housed in the housing space 30 of the screw body mounting portion 20 so that the insertion hole 43 faces the insertion hole 21 of the screw body mounting portion 20. . The accommodation space 30 is formed with a first accommodation space 31 formed wider on the front side along the insertion direction of the screw 18 to the screw body mounting portion 20, and on the back side of the first accommodation space 31 in the insertion direction of the screw 18. The second storage space 32 is positioned and is narrower than the first storage space 31.

  A step 33 is formed at the boundary between the first accommodation space 31 and the second accommodation space 32 on the inner surface of the screw body mounting portion 20 forming the accommodation space 30. Furthermore, an abutting surface 34 is formed on the inner surface of the screw body mounting portion 20 (wall portion 20a) that forms the accommodating space 30. The abutting surface 34 abuts the entire surface of the board 41 on the near side in the insertion direction of the screw 18. The contact surface 34 is formed so as to bulge in an arc shape toward the accommodation space 30 (the first accommodation space 31). The arc of the contact surface 34 and the arc of the substrate 41 in the initial state are formed with substantially the same curvature.

  The opening width of the first accommodation space 31 along the length direction of the screw body mounting portion 20 (the direction orthogonal to the insertion direction of the screw 18) is the length along the long side direction of the substrate 41 in the initial state of being bent like a bow. More widely formed. Further, the opening width of the first accommodation space 31 along the insertion direction of the screw 18 to the screw body 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 body locking member 40 is housed in the housing space 30 in a curved state so that the insertion holes 43 are positioned on the back side in the insertion direction of the screw 18 from both ends of the board 41 in the long side direction.

  Further, the surface of the board 41 in the insertion direction of the screw 18 can be brought into contact with the step 33, and the entire surface of the board 41 in the insertion direction of the screw 18 is in contact with the contact surface 34. It is possible to contact. 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, in the state where the substrate 41 is in contact with and supported by the step 33, a gap is formed between the substrate 41 and the insertion hole 43 in the insertion direction of the screw 18. Further, in the accommodation space 30, the screw body locking member 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 has a step 33. The part other than the contact part is not in contact with the inner surface of the screw body mounting portion 20. Therefore, the substrate 41 is allowed to bend and deform in the first accommodation space 31 and the second accommodation space 32, and the first accommodation space 31 and the second accommodation space 32 form a substrate deformation allowance space.

  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. While extending obliquely toward the second storage space 32, the second storage space 32 is disposed in a state of being a free end. Since the locking claw 42 is disposed in a state where it is a free end in the second storage space 32, the movement (bending deformation) of the locking claw 42 in the second storage space 32 is allowed. It is like that. Therefore, the second storage space 32 forms a locking claw storage space for storing the locking claw 42 while allowing the locking claw 42 to move (bend deformation).

  As shown in FIGS. 1 and 3, the upper side wall 13 and the lower side wall 14 communicate with the outside of the wiring box 11 and the first accommodation space 31 through the upper side wall 13 and the lower side wall 14. 36 is formed. In the opening shape of the communication hole 36 on the outer surface of the upper side wall 13 and the lower side wall 14, the opening width of the communication hole 36 along the insertion direction of the screw 18 is wider than the opening width of the first accommodation space 31 along the insertion direction. Is formed. The opening width of the communication hole 36 along the insertion direction of the screw 18 gradually decreases from the outer surface side of the upper side wall 13 and the lower side wall 14 toward the first accommodation space 31. It is narrower than the opening width. Further, the opening width of the communication hole 36 along the direction orthogonal to the insertion direction of the screw 18 is the same as the opening width of the first accommodation space 31.

  A screw body locking member 40 is inserted into the accommodation space 30 from the communication hole 36. Since the board 41 is curved in the initial state, the screw body locking member 40 is deformed into a flat plate shape and the screw body locking member 40 is inserted into the communication hole 36. When the screw body locking member 40 is accommodated in the accommodating space 30, the substrate 41 is accommodated in the accommodating space 30 in an initial state of a bow by returning the substrate 41 to the original shape. Moreover, the opening of the communication hole 36 in the outer surface of the upper side wall 13 and the lower side wall 14 is closed by the adhesive tape 51 as a closing member.

  In order to attach the wiring device 19 to the wiring box 11 having the above configuration, first, the wiring device 19 is held by the wiring device holding frame 50 as shown in FIG. Next, each of the pair of screws 18 penetrating the wiring device holding frame 50 is inserted into the insertion holes 21 of the screw body mounting portions 20. At this time, the interval between the insertion hole 21 and the guide hole 22 is shorter than the length along the axial direction of the guide protrusion 18c. For this reason, the guide projection 18 c enters the guide hole 22 before the shaft 18 b of the screw 18 presses the locking claw 42. That is, as shown in FIG. 4, the guide protrusion 18 c passes through the insertion hole 43 from the insertion hole 21 and is inserted into the guide hole 22.

  Subsequently, the screw 18 is pushed into the screw body mounting portion 20. 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 the locking claws 42 are pressed toward the second accommodation space 32 by the shaft portion 18b, the locking claws 42 move (bend and deform) in the second accommodation space 32, and the screw body. In the locking member 40, both end sides (both ends 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 abutted and supported by the step 33. Further, when the screw 18 is pushed into the screw body attaching portion 20, 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, 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, Further, 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. Thereafter, as shown in FIG. 5, when the bent claw 42 is returned to its original shape by elastic deformation, the tip of the claw 42 is locked to the shaft portion 18b. Further, when the pressing of the screw 18 against the screw body locking member 40 is stopped, the bent and deformed substrate 41 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.

  Then, after the locking claw 42 is locked to the shaft portion 18b, the screw 18 is screwed with respect to the screw body locking member 40 in order to attach the wiring device holding frame 50 to the screw body mounting portion 20 (increase). When tightened, the screw body locking member 40 is drawn toward the contact surface 34, and the entire substrate 41 contacts the contact surface 34. Further, when the screw 18 is screwed, the wiring device 19 is attached to the wiring box 11 when the screw 18 stops screwing.

According to the above embodiment, the following effects can be obtained.
(1) The first housing space 31 and the second housing space 32 that allow the entire deformation of the board 41 in the screw body locking member 40 are formed in the screw body mounting portion 20, and the locking claws 42 are moved. The second storage space 32 is formed to accommodate the above. For this reason, when the latching claw 42 is pressed by the screw 18 (shaft portion 18b), the pressing force is transmitted to the substrate 41 via the latching claw 42, and the entire substrate 41 is accommodated in the first accommodation space 31 and the second accommodation. The space 32 is bent and deformed. Therefore, due to the bending deformation of the entire substrate 41, the insertion resistance of the screw 18 by the locking claw 42 is reduced, and the screw 18 can be easily inserted into the screw body locking member 40 (screw body mounting portion 20). Can do. On the other hand, each of the locking claws 42 has a required strength, and even when the screw 18 is moved in the anti-insertion direction, the state in which the locking claw 42 is locked to the shaft portion 18b is maintained. The escape from the portion 20 can be prevented. Therefore, according to the screw body mounting portion 20, it is possible to facilitate the mounting operation of the screw 18 to the screw body mounting portion 20, and to improve the force for restricting the screw 18 from being pulled out from the screw body mounting portion 20. it can.

  (2) The accommodation space 30 is located on the back side of the first accommodation space 31 in the insertion direction of the screw 18 and the first accommodation space 31 which is narrower than the first accommodation space 31 in the insertion direction of the screw 18. A step 33 is formed between the first storage space 31 and the second storage space 32. When the screw body locking member 40 is pressed by the screw 18, both end sides, which are the base end sides of the locking claws 42 in the substrate 41, immediately come into contact with the step 33, so that the entire substrate 41 is quickly bent and deformed. The resistance of the locking claw 42 can be quickly reduced.

  (3) With the both ends of the base plate 41 at the base end side of the base plate 41 being supported by the step 33, the entire base plate 41 is bent and deformed as the screw 18 is inserted into the insertion hole 43, and the base plate 42 is locked. The opening width of the second accommodation space 32 is set so that the substrate 41 that has been bent and deformed and the moving locking claw 42 do not protrude from the second accommodation space 32 when the is moved. For this reason, it is possible to prevent the moving locking claw 42 from jumping out of the screw body attaching portion 20 and to prevent the wiring or the like from coming into contact with the locking claw 42.

  (4) On the inner surface of the screw body mounting portion 20 (wall portion 20a) forming the first housing space 31, the contact surface 34 bulges in front of the screw body locking member 40 in the insertion direction of the screw 18. Has been. When the screw 18 is screwed into the screw body mounting portion 20 in order to attach the wiring device holding frame 50 to the screw body mounting portion 20 and when the screw 18 is moved in the anti-insertion direction, the substrate 41 comes into contact with Immediately contacts the surface 34. For this reason, for example, compared with the case where the contact surface 34 is not formed, the amount by which the screw 18 is moved before the screw body locking member 40 is brought into contact with the inner surface of the screw body mounting portion 20 is reduced. After the abutment comes into contact with the abutment surface 34, the amount by which the screw 18 is screwed can be reduced. Therefore, it is possible to improve the mounting workability of the wiring device holding frame 50 by reducing the amount (screw tightening amount) by which the screw 18 is screwed to attach the wiring device holding frame 50 (wiring device 19) to the wiring box 11. it can.

  (5) The curvature of the contact surface 34 and the substrate 41 is formed substantially the same, and the contact surface 34 contacts the entire surface of the substrate 41. For this reason, when the board | substrate 41 contact | abuts to the contact surface 34, even if the bis | screw 18 is screwed into the screw body attachment part 20, the board | substrate 41 is prevented from bending deformation. Therefore, it is possible to prevent the locking claw 42 from being bent and deformed in the opposite direction due to the screwing of the screw 18, and the state where the locking claw 42 is locked to the shaft portion 18b can be maintained.

  (6) A cutout 44 is formed in the side portion 41 a of the substrate 41. For this reason, compared with the case where the notch 44 is not formed in the side portion 41 a of the substrate 41, the portion of the substrate 41 that sandwiches the insertion hole 43 can be narrowed so that the substrate 41 can be easily bent and deformed. Therefore, by making the board 41 easily bent and deformed, it is possible to easily insert the screw 18 between the locking claws 42 and to further improve the removal restriction by the locking claws 42.

  (7) As a method of assisting the bending deformation of the substrate 41, the notch 44 is formed in the substrate 41. Since the cutout portion 44 only needs to press and remove the metal plate forming the substrate 41, the screw body locking member 40 can be easily manufactured.

  (8) The communication hole 36 communicating with the first accommodation space 31 of the accommodation space 30 is closed by the adhesive tape 51. For this reason, it is possible to prevent the screw body locking member 40 housed in the housing space 30 from dropping out of the screw body mounting portion 20 from the housing space 30.

  (9) The screw 18 is provided with a guide projection 18c protruding from the shaft 18b to the tip side. A guide hole 22 is formed in the screw body mounting portion 20 at a position facing the insertion hole 21 with the accommodation space 30 in between, and the interval between the insertion hole 21 and the guide hole 22 is in the axial direction of the guide protrusion 18c. It is shorter than the length along. Therefore, the guide protrusion 18 c enters the guide hole 22 before the shaft 18 b of the screw 18 abuts on the tip of the locking claw 42 and presses the locking claw 42. Therefore, the screw 18 can be inserted into the insertion hole 43 without being inclined with respect to the screw body locking member 40.

  (10) The wiring box 11 includes a pair of screw body mounting portions 20 for mounting the wiring device 19 via the wiring device holding frame 50. And the screw body attaching part 20 exhibits the effect as described in said (1)-(9). Therefore, it is possible to easily perform the attaching operation of the wiring device 19 to the wiring box 11 including the screw body attaching portion 20, and the wiring device 19 attached to the wiring box 11 is dropped from the wiring box 11. Can be prevented.

  (11) The screw body mounting portion 20 is formed on the inner surfaces of the upper side wall 13 and the lower side wall 14 having a rectangular plate shape, and the screw body locking member 40 extends in the extending direction of the locking claws 42 on the substrate 41 ( The long side direction of the substrate 41 is accommodated in the screw body mounting portion 20 so as to be along the length direction of the upper side wall 13 and the lower side wall 14. Here, for example, when the screw body locking member 40 having a rectangular plate shape is accommodated in the screw body mounting portion 20 so that the extending direction of the locking claws 42 is orthogonal to the length direction of the side walls 13 and 14, The projecting length of the screw body mounting portion 20 into the wiring box 11 becomes long, and the space in the wiring box 11 becomes narrow. Therefore, as in the present embodiment, the screw body locking member 40 is arranged so that the extending direction of the locking claw 42 in the substrate 41 (long side direction of the substrate 41) is along the length direction of the upper side wall 13 and the lower side wall 14. In the screw body mounting portion 20 does not narrow the space in the wiring box 11.

  (12) The opening width of the first accommodation space 31 along the insertion direction of the screw 18 is formed to be shorter than the entire length in the thickness direction of the screw body locking member 40 in the initial state. The opening width of the communication hole 36 along the insertion direction of the screw 18 gradually decreases from the outer surface side of the upper side wall 13 and the lower side wall 14 toward the first accommodation space 31. It is narrower than the opening width. Therefore, when the screw body locking member 40 deformed into a flat plate shape is inserted into the first accommodation space 31 from the communication hole 36 and the substrate 41 returns to the original shape, the screw body locking member 40 is returned from the first accommodation space 31. Can be prevented from coming out.

(Second Embodiment)
Hereinafter, a second embodiment in which the present invention is embodied in the structure of the screw body mounting portion of the wiring box will be described with reference to FIG. In the following description, for the “front” and “rear” of the screw body mounting portion 60, the direction of the arrow Y3 shown in FIG.

  A housing space 61 for housing the screw body locking member 40 is formed in the screw body mounting portion 60 of the second embodiment. The accommodation space 61 is formed such that the length in the length direction of the screw body mounting portion 60 is constant along the insertion direction (front-rear direction) of the screw 18. The opening width of the accommodation space 61 along the insertion direction of the screw 18 to the screw body mounting portion 60 is wider than the entire length in the thickness direction of the screw body locking member 40, and the first accommodation space of the first embodiment. It is formed wider than 31.

  Further, in the screw body mounting portion 60, an insertion hole 62 through which the screw 18 can be inserted from the front surface of the screw body mounting portion 60 is formed in the wall portion 60a located on the front side in the insertion direction of the screw 18. In the screw body mounting portion 60, a through hole 63 penetrating the wall portion 60 b is formed in the wall portion 60 b of the screw body mounting portion 60 located on the back side in the insertion direction of the screw 18 so as to communicate with the accommodation space 61. Yes. In the second embodiment, the accommodation space 61 and the through hole 63 form a substrate deformation allowable space, and the through hole 63 forms a locking claw movement space.

  According to the second embodiment, when the locking claw 42 is pressed by the screw 18 (shaft portion 18 b), both end sides that are the base end side of the locking claw 42 in the substrate 41 are around the through hole 63. It contacts the inner surface of the screw body mounting portion 60. Then, when the pressing force is transmitted to the substrate 41 via the locking claws 42, the tips of the pair of locking claws 42 are separated from each other in the substrate 41, and the shaft portion 18b enters between the locking claws 42 of the shaft portion 18b. The substrate 41 is deformed so that the curvature of the substrate 41 becomes smaller than the curvature before the bending deformation.

  At this time, at both ends in the length direction of the accommodation space 61, bending deformation in the opposite insertion direction at both ends, which is the base end side of the locking claw 42 in the substrate 41, is allowed, and the through hole 63 allows the substrate to The bending deformation of the central portion in 41 in the insertion direction is allowed. That is, the entire deformation of the substrate 41 is allowed by the accommodation space 61 and the through hole 63. Further, the locking claw 42 moves (bends and deforms) in the through hole 63. Therefore, due to the bending deformation of the entire substrate 41, the insertion resistance of the screw 18 by the locking claw 42 is reduced, and the screw 18 can be easily inserted into the screw body locking member 40 (screw body mounting portion 60). Can do. On the other hand, each of the locking claws 42 has a required strength, and even when the screw 18 is moved in the anti-insertion direction, the state in which the locking claw 42 is locked to the shaft portion 18b is maintained. The escape from the part 60 can be prevented. Therefore, according to the screw body mounting portion 60, the screw 18 can be easily attached to the screw body mounting portion 60, and the ability to restrict the screw 18 from coming out of the screw body mounting portion 60 can be improved. it can.

In addition, you may change the said embodiment as follows.
As shown in FIG. 8, in the screw body mounting portion 20 of the first embodiment, the locking claw 42 of the board 41 is placed on the wall portion 20a of the screw body mounting portion 20 located on the front side of the screw 18 in the insertion direction. You may form the 3rd accommodating space 37 as a board | substrate deformation | transformation tolerance space which accept | permits the bending deformation of the both ends side (long side direction of the board | substrate 41) used as a base end side. The third accommodation space 37 communicates with the first accommodation space 31.

  As shown in FIG. 9, in the screw body mounting portion 20 of the first embodiment, the locking claw 42 of the substrate 41 is placed on the wall portion 20 a of the screw body mounting portion 20 located on the front side of the screw 18 in the insertion direction. You may form the latching hole 25 which can latch the both ends side (long-side direction both ends side of the board | substrate 41) used as a base end side. The locking hole 25 communicates with the first accommodation space 31. Further, bent portions 41 b are formed at both ends of the substrate 41. If comprised in this way, when the bending part 41b of the board | substrate 41 latches to the inner surface of the screw body attachment part 20 which forms the locking hole 25, the screw body locking member 40 will be the length direction of the screw body attachment part 20. Is restricted from moving to. Therefore, the insertion hole 43 of the screw body locking member 40 can be matched with the insertion hole 21.

  As shown in FIG. 10, in the screw body mounting portion 20 of the first embodiment, the inner surface of the screw body mounting portion 20 forming the first accommodation space 31, in the length direction of the screw body mounting portion 20. A pair of restricting protrusions 26 may protrude from the position sandwiching the insertion hole 21 into the first accommodating space 31, and each restricting protrusion 26 may be brought into contact with the locking claw 42. With this configuration, when the screw 18 is screwed into the screw body mounting portion 20 in order to attach the wiring device holding frame 50 to the screw body mounting portion 20, the restricting protrusion 26 is formed on the board 41. It is in contact with the surface on the near side in the insertion direction of the locking claw 42 on the back side in the insertion direction with respect to both ends that are the base end side. For this reason, when the central portion of the substrate 41 is pulled toward the insertion hole 21 (front side) by the screw 18 being screwed, the locking claw 42 is pulled by the contact of the restricting projection 26 with the locking claw 42. It is possible to prevent warpage (reverse warping) of the entire substrate 41 in the anti-insertion direction due to the locking claws 42 being pulled.

  ○ In the screw body mounting portion 20 of the first embodiment, a pair of restricting protrusions project from the abutment surface 34 into the first accommodating space 31, and each of the restricting protrusions contacts the locking claw 42. You may contact.

  As shown in FIG. 11, at a position sandwiching the insertion hole 43 in the short side direction of the substrate 41, a through hole 45 as a deformation assisting portion that assists the bending deformation of the substrate 41 penetrates the substrate 41 in the thickness direction. Is formed.

  As shown in FIG. 12, on the inner surfaces of the upper side wall 13 and the lower side wall 14 of the wiring box 11, a screw threaded portion 39 is directed into the wiring box 11 at a position sandwiching the center portions of the upper side wall 13 and the lower side wall 14. Project. The screw body locking member 40 has a length along the extending direction of the locking claw 42 in the substrate 41 (length in the long side direction of the substrate 41) longer than that of the first embodiment. Screw holes 47 extending in the shape of long holes in the extending direction of the locking claws 42 are formed on both ends of 41. A mounting screw 48 is screwed into the screw threaded portion 39 from each screw hole 47 to attach the screw body locking member 40 to the wiring box 11. With this configuration, when the locking claw 42 is pressed by the screw 18 (shaft portion 18 b), the pressing force is transmitted to the substrate 41 through the locking claw 42, and the entire substrate 41 is placed in the wiring box 11. Deflection and deformation. At this time, since both end portions of the screw body locking member 40 slide along the direction in which the screw hole 47 extends, the insertion resistance of the screw 18 by the locking claw 42 is reduced, and the screw body locking member 40 (screw body). The screw 18 can be easily inserted into the mounting portion 20). On the other hand, each of the locking claws 42 has a required strength, and even when the screw 18 is moved in the anti-insertion direction, the state in which the locking claw 42 is locked to the shaft portion 18b is maintained. The escape from the stop member 40 can be prevented. Therefore, according to this wiring box 11, it is possible to facilitate the attaching operation of the screw 18 to the screw body locking member 40, and to improve the force for restricting the screw 18 from being detached from the screw body locking member 40. be able to.

  O You may change the screw body attachment part 60 of 2nd Embodiment as shown in FIG. Specifically, as shown in FIG. 13A, in the insertion direction of the screw 18 into the screw body mounting portion 60, the wall portion 60b of the screw body mounting portion 60 located on the back side from the insertion hole 62 penetrates. A hole 63 is formed. Further, in the screw body mounting portion 60, a position on the inner surface of the screw body mounting portion 60 that forms the housing space 61 and sandwiching the insertion hole 62 in the length direction of the screw body mounting portion 60 is expanded toward the housing space 61. Let it come out. At this time, the inner surface of the screw body mounting portion 60 is bulged so that the opening width of the accommodation space 61 along the insertion direction of the screw 18 gradually becomes narrower from both ends of the accommodation space 61 toward the insertion hole 62 side. . In the aspect of FIG. 13, the substrate deformation allowance space is formed by the accommodation space 61, and the substrate deformation allowance space (accommodation space 61) is both ends (substrates) on the base end side of the locking claw 42 in the substrate 41. 41 at both ends of the screw 18 in the insertion direction.

  Further, as shown in FIG. 13B, the first inner surface of the screw body mounting portion 60 that forms the housing space 61 and projecting into the housing space 61 at a position sandwiching the insertion hole 62. The support surface 64 is formed. Then, in a state where the screw body locking member 40 in the initial state is accommodated in the accommodation space 61, both side portions 41 a of the substrate 41 sandwiching the insertion hole 43 from the short side direction are from the surface on the near side in the insertion direction of the screw 18. It is supported by the first support surface 64.

  In addition, a second support surface 65 is formed on the inner surface of the screw body mounting portion 60 forming the accommodation space 61 around the through hole 63 and at a position facing both side portions 41 a of the substrate 41. Then, in the state where the screw body locking member 40 in the initial state is accommodated in the accommodation space 61, both side portions 41 a of the substrate 41 sandwiching the insertion hole 43 are second supported from the back surface in the insertion direction of the screw 18. Supported by surface 65. In the state in which both sides 41a of the substrate 41 are supported by the first support surface 64 on the front surface in the insertion direction of the screw 18 and the second support surface 65 is supported on the back surface. The pawl 42 is accommodated in the through hole 63.

  Further, as shown in FIG. 13A, in a state where the substrate 41 is supported by the first and second support surfaces 64 and 65, both end sides (substrates) which are the proximal end sides of the locking claws 42 in the substrate 41. 41 is accommodated in the accommodation space 61 (substrate deformation allowable space), and the through hole 63 is formed on the back side of the first support surface 64 in the insertion direction of the screw 18.

  And according to the aspect of FIG. 13, when the screw | thread 18 is inserted in the insertion hole 43 and the latching claw 42 is pressed by the screw | thread 18 (shaft part 18b), the both sides 41a of the board | substrate 41 are the 2nd support surface. Since the substrate 41 is supported by 65, both end sides, which are the base end sides of the locking claws 42, are bent and deformed in the accommodating space 61 in the anti-insertion direction of the screw 18. Then, in the substrate 41, the curvature of the substrate 41 is bent and deformed so that the distal ends of the pair of locking claws 42 are separated and the shaft portion 18b is allowed to enter between the locking claws 42 of the shaft portion 18b. Deforms to be smaller than the curvature.

  Further, the locking claw 42 moves so as to bend and deform within the through hole 63. Therefore, due to the bending deformation of the entire substrate 41, the insertion resistance of the screw 18 by the locking claw 42 is reduced, and the screw 18 can be easily inserted into the screw body locking member 40 (screw body mounting portion 60). Can do. On the other hand, each of the locking claws 42 has a required strength, and even when the screw 18 is moved in the anti-insertion direction, the state in which the locking claw 42 is locked to the shaft portion 18b is maintained. The escape from the part 60 can be prevented. Therefore, according to the screw body mounting portion 60, the screw 18 can be easily attached to the screw body mounting portion 60, and the ability to restrict the screw 18 from coming out of the screw body mounting portion 60 can be improved. it can.

In the screw body attaching portion 60 shown in FIG. 13, the first support surface 64 may not be provided, and both side portions 41 a of the substrate 41 may be supported only by the second support surface 65.
In each embodiment, the screw body mounting portions 20 and 60 may be provided on a wiring device mounting frame having a square frame shape as the wiring device mounting body.

  In the first embodiment, the opening width of the communication hole 36 along the insertion direction of the screw 18 is formed to be constant from the outer surface side of the upper side wall 13 and the lower side wall 14 toward the screw body mounting portion 20. It may be.

In each embodiment, the opening of the communication hole 36 on the outer surface of the upper side wall 13 and the lower side wall 14 may not be closed by the adhesive tape 51.
In each embodiment, a bolt or a wood screw may be used instead of the screw 18 as a screw body.

  In the first embodiment, in the state where the screw body locking member 40 is housed in the housing space 30, both ends (the long side direction of the substrate 41) where the insertion hole 43 becomes the proximal end side of the locking claw 42 in the substrate 41. It may not be curved so as to be located further in the insertion direction of the screw 18 than both ends), and may be accommodated in the accommodation space 30 in a flat plate shape, or the substrate 41 may be bent and deformed when the screw 18 is inserted.

  ○ Even when the screw 18 is inserted into the screw body attaching portions 20, 60, the locking claw 42 does not bend and deform, and only insertion of the screw 18 into the insertion hole 43 is allowed using only the bending deformation of the substrate 41. Good. Note that the locking claw 42 may bend in an auxiliary manner within a range in which the locking claw 42 is prevented from being pulled out.

  The board deformation allowable space and the locking claw movement space may be formed so as to open from the screw body mounting portions 20 and 60 toward the outside. That is, in a state in which the screw body locking member 40 is accommodated in the screw body mounting portions 20 and 60, the entire screw body locking member 40 is not accommodated in the accommodation space of the screw body mounting portions 20 and 60. May jump out of the screw body mounting portions 20, 60.

The board 41 in the screw body locking member 40 may be formed in an elliptical shape or an elongated disk shape in plan view.
In the first embodiment, the first housing space 31 and the second housing space 32 are formed inside the screw body mounting portion 20, and the second side in the insertion direction of the screw 18 is further second from the second housing space 32. It may be formed wider than the accommodation space 32. In this case, the space behind the second storage space 32 in the insertion direction of the screw 18 may be formed with the same width as the first storage space 31, or may be formed wider than the first storage space 31. Good.

  In each embodiment, three or four or more locking claws 42 in the screw body locking member 40 may be formed.

The perspective view which shows the box for wiring of 1st Embodiment, and a screw body latching member. The partial expanded plane sectional view which shows the inside of a screw body attaching part. The longitudinal cross-sectional view which shows the inside of a screw body attaching part. The partial expanded plan view which shows the state by which the screw body locking member was pressed with the bis | screw. The partial expanded plane sectional view which shows the state which the board | substrate contact | abutted to the contact surface. The longitudinal cross-sectional view which shows the state which attached the wiring fixture to the box for wiring. The partial expanded plane sectional view which shows the screw body attaching part of 2nd Embodiment. The partial expanded plane sectional view which shows another example of a screw body attaching part. The partial expanded plane sectional view which shows another example of a screw body attaching part. The partial expanded plane sectional view which shows another example of a screw body attaching part. The figure which shows another example of a screw body latching member. The partial front view which shows another example of the box for wiring. (A) is a partial enlarged plan sectional view showing another example of the screw body attaching portion, and (b) is a longitudinal sectional view showing another example of the screw body attaching portion.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Wiring box as a wiring fixture attachment body, 13 ... Upper side wall as a side wall in which a screw body attachment part is provided, 14 ... Lower side wall as a side wall in which a screw body attachment part is provided, 18 ... Screw as a screw body, 18b ... Shaft part, 18c ... Guide protrusion, 19 ... Wiring device, 20,60 ... Screw body attaching part, 21,62 ... Insertion hole, 22 ... Guide hole, 25 ... Locking hole, 26 ... Restriction protrusion, 30 , 61... Accommodation space, 31... First accommodation space as substrate deformation allowance space in accommodation space, 32... Substrate accommodation allowance space in accommodation space and second accommodation space as locking claw movement space, 33. Abutting surface, 36: communicating hole, 39: screw threaded portion, 40: screw body locking member, 41 ... substrate, 41b ... bent portion, 42 ... locking claw, 43 ... insertion hole, 44 ... as deformation assisting portion Notch, 45 ... as a deformation assisting part Hole, 47 ... screw hole, 48 ... mounting screw, 51 ... adhesive tape as closure member 65 ... second supporting surface.

Claims (3)

In order to attach the wiring device to the wiring device mounting body having a frame shape or box shape by a screw body, the wiring device mounting body is provided with an insertion hole through which the screw body can be inserted and the screw body. A screw-like attachment portion in which a plate-like screw engagement member that is engaged with the shaft portion is housed,
An insertion hole into which the screw body is inserted is formed in the board of the screw body locking member, and the screw body is engaged with the shaft portion inserted into the screw body mounting portion from the insertion hole. At least a pair of locking claws extending from the substrate so that the tips are opposed to each other and are directed toward the insertion direction of the screw body so as to restrict the withdrawal from the screw body attachment portion in the anti-insertion direction, The substrate is formed so as to be able to bend and deform in order to widen the interval between the tips of the locking claws when the screw body is inserted into the insertion hole,
In the screw body attaching portion, an accommodation space for supporting and housing the screw body locking member is formed so that an insertion hole of the screw body locking member faces the insertion hole,
A locking claw movement space in which the locking claw moves when the screw body is inserted into the insertion hole, and a substrate deformation allowing space that allows the substrate to bend and deform as the screw body is inserted are provided. ,
A guide projection protrudes from the tip of the shaft portion of the screw body, and a guide hole is formed in the screw body mounting portion at a position facing the insertion hole with the accommodation space interposed therebetween. A structure of a screw body mounting portion in which an interval between the insertion hole and the guide hole along the insertion direction is set shorter than a length of the guide protrusion . In order to attach the wiring device to the wiring device mounting body having a frame shape or box shape by a screw body, the wiring device mounting body is provided with an insertion hole through which the screw body can be inserted and the screw body. A screw-like attachment portion in which a plate-like screw engagement member that is engaged with the shaft portion is housed,
An insertion hole into which the screw body is inserted is formed in the board of the screw body locking member, and the screw body is engaged with the shaft portion inserted into the screw body mounting portion from the insertion hole. At least a pair of locking claws extending from the substrate so that the tips are opposed to each other and are directed toward the insertion direction of the screw body so as to restrict the withdrawal from the screw body attachment portion in the anti-insertion direction, The substrate is formed so as to be able to bend and deform in order to widen the interval between the tips of the locking claws when the screw body is inserted into the insertion hole,
In a direction perpendicular to the extending direction of the pair of locking claws facing each other on the substrate, a deformation assisting part is formed by notching the substrate to assist in bending deformation of the substrate at a position sandwiching the insertion hole. Is formed,
In the screw body attaching portion, an accommodation space for supporting and housing the screw body locking member is formed so that an insertion hole of the screw body locking member faces the insertion hole,
A locking claw movement space in which the locking claw moves when the screw body is inserted into the insertion hole, and a substrate deformation allowing space that allows the substrate to bend and deform as the screw body is inserted are provided. The structure of the screw body mounting part. In order to attach the wiring device by a screw body, a screw in which a through-hole through which the screw body can be inserted is formed on the front surface and a plate-like screw body locking member that locks to a shaft portion of the screw body is housed inside A wiring device mounting body having a frame shape or a box shape having a pair of body mounting portions facing each other, wherein the wiring device mounting body includes the screw body mounting portion according to claim 1 or 2 as the screw body mounting portion. .

Images