Wiring accessory installation body

Abstract

To provide a wiring accessory installation body capable of improving installation work of a wiring accessory to a wall.SOLUTION: This wiring accessory installation body comprises: an installation body; and a holding mechanism. The holding mechanism is provided in the installation body. and includes a holding part that abuts against the peripheral edge of a wall hole from a wall surface side, a lower holding body that is disposed on the wall backside via the wall hole and that abuts against at least the peripheral edge lower part of the wall hole, a lower operation part held in the installation body to as to idly rotate to operate the lower holding body with tilting of a screw shaft regulated against the body, and a lower moving body that is engaged with the screw shaft behind the lower holding body and that moves toward the wall along with one-direction rotation of the screw shaft and presses the lower holding body from behind. The lower holding body can move from a non-interference position which allows passage through the wall hole without interfering with the wall to a holding position which enables holding of the wall facing the wall relative to the installation body. The movement from the non-interference position to the holding position is free falling of the lower holding body.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a wiring device installation body for installing a wiring device on a wall. [Background technology]

[0002] Conventionally, when installing wiring devices such as switches and outlets at predetermined positions on the wall surface of a structure, a wall hole is formed in the wall and the wiring device is attached through the wall hole. Generally, the wiring device is connected to a distribution cable behind the wall and is installed so that it is exposed on the surface of the wall. Various wiring device installation structures are used to fix the wiring device to the wall through the wall hole.

[0003] Patent Document 1 discloses a wiring fixture mounting frame (wiring fixture installation body) used for mounting wiring fixtures such as switches and outlets to a wall hole. Hereinafter, in this paragraph, the reference numerals of Patent Document 1 are shown in parentheses. The wiring fixture mounting frame (1) of Patent Document 1 is integrally formed by attaching a pair of mounting brackets (3) to the upper and lower ends on the back side of a mounting frame body (2) which is entirely formed in a substantially square plate shape with screws (4) which are clamping tools. The mounting bracket (3) is formed by bending a metal plate material, and has a planar contact portion (3b) that comes into contact with the back surface of the wall material (11) when the wiring fixture mounting frame (1) is attached to the wall material (11), a screw hole (3c) to which the screw (4) is screwed, and a protrusion (3a) that is inserted into a corner hole (2b) of the mounting frame body (2). This mounting bracket (3) is integrally formed in a temporarily tightened state with the mounting frame body (2) by screwing a screw (4) passing through a pair of vertically long oblong holes (2e) formed in the mounting frame body (2) into the screw hole (3c) of the mounting bracket (3). Also, the corner holes (2b) of the wiring fixture mounting frame (1) are formed at a height where the mounting bracket (3) can move up and down by a predetermined distance. To attach the wiring fixture mounting frame (1) formed by temporarily tightening the screw (4) to integrate the mounting frame body (2) and the mounting bracket (3) to the wall material (11), first, the upper and lower pair of mounting brackets (3) are respectively brought closer to the center direction of the wall hole (12) in the mounting frame body (2). And in this state, the mounting bracket (3) is inserted into the wall hole (12), and the mounting frame body (2) is brought into contact with the surface of the wall material (11). At this time, since the mounting bracket (3) is brought closer to the center direction of the wall hole (12), both left and right end portions (3d) of the contact portion (3b) do not interfere with the periphery of the wall hole (12) to prevent insertion, and can be inserted smoothly. After inserting the mounting bracket (3) into the wall hole (12), the protrusion (3a) and the screw (4) of each mounting bracket (3) are respectively moved within the corner hole (2b) and the oblong hole (2e) of the mounting frame body (2) to slide the mounting bracket (3) in the vertical separation direction, and the contact portion (2b) is opposed to the back surface of the wall material (11). Next, the screw (4) is screwed into the screw hole (3c) of the mounting bracket (3), and the wall material (11) is clamped between the back surface of the mounting frame body (2) and the contact portion (3b) of the mounting bracket (3). Thus, the attachment of the wiring fixture mounting frame (1) to the wall material (11) is completed.

Prior Art Documents

Patent Document

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the conventional wiring fixture mounting frame (wiring fixture installation body) of Patent Document 1, in the operation of installing a wiring fixture on a wall, a pair of upper and lower mounting brackets are passed through a wall hole in a state where they are each brought closer to the center of the mounting frame body, and after inserting the mounting brackets, the pair of upper and lower mounting brackets are each slid in the vertically separated direction for alignment, and then a screw is screwed to sandwich the wall between the back surface of the mounting frame body and the pair of upper and lower mounting brackets. That is, the user has to move the pair of upper and lower mounting brackets to the clamping positions in a state where they cannot be seen from the wall surface side, and it is necessary to screw the screw while gripping (at least the upper) mounting bracket by hand. Further, in the wiring fixture mounting frame, since the screw passes through the long hole formed in the mounting frame body and the mounting bracket is screwed to the tip of the screw, the screw easily moves in the long hole and tilts in its longitudinal direction. Therefore, it is also necessary for the user to maintain the posture of the screw perpendicular to the wall surface. Therefore, in the conventional wiring fixture mounting frame, it is a problem that the work of fixing the wiring fixture to the wall material through the wall hole is accompanied by difficulty. Further, in the work, since the inclination of the posture of the screw and the displacement of the mounting bracket easily occur, it is also a problem that it is difficult to stably fix the wiring fixture to the wall.

[0006] The present invention has been made to solve at least one of the above problems, and an object thereof is to provide a wiring fixture installation body that enables improvement of the work of installing a wiring fixture on a wall.

Means for Solving the Problems

[0007] The wiring fixture installation body according to claim 1 is a wiring fixture installation body for installing a wiring fixture with respect to a wall hole formed in a wall, an installation body main body having a peripheral wall defining an internal space, an opening exposing the internal space to the outside, and a fixture frame attachment portion to which a fixture frame for holding a wiring fixture is attached, and a clamping mechanism for fixing the installation body main body inserted into the wall hole to the wall by clamping the peripheral edge of the wall hole, wherein the clamping mechanism includes a clamping portion provided on the installation body main body and contacting the peripheral edge of the wall hole from the wall surface side, a lower clamping body disposed on the back side of the wall through the wall hole and contacting at least the lower part of the peripheral edge of the wall hole from the back side of the wall, a lower operation portion for operating the lower clamping body, the lower clamping body being rotatably held on the installation body main body in a state where tilting of the screw shaft with respect to the installation body main body is restricted and having a screw shaft that is rotationally operated from the wall surface side, and a lower moving body screwed to the screw shaft behind the lower clamping body and advancing toward the wall in accordance with rotation of the screw shaft in one direction to press the lower clamping body from behind, wherein the lower clamping body is relatively movable with respect to the installation body main body from a non-interference position where it can pass through the wall hole without interfering with the wall to a clamping position where it faces the wall and clamps the wall, and the movement from the non-interference position to the clamping position is a free fall of the lower clamping body.

[0008] The wiring fixture installation body according to claim 2 is the wiring fixture installation body according to claim 1, wherein at least a part of the lower clamping body in the non-interference position is disposed within the internal space.

[0009] The wiring fixture installation body according to claim 3 is the wiring fixture installation body according to claim 2, wherein the lower clamping body has a supported portion supported by hanging a finger inserted into the internal space to maintain the non-interference position, and the supported portion can be hooked within the internal space in both the non-interference position and the clamping position.

[0010] The wiring device installation body according to claim 4 is the wiring device installation body according to claim 1, wherein the lower clamping body has a supported portion supported at the non-interference position by the installation body main body, When the lower clamping body advances toward the wall by the rotation operation of the screw shaft, the support of the supported portion is released, and the lower clamping body is configured to freely fall from the non-interference position to the clamping position.

[0011] The wiring device installation body according to claim 5 is the wiring device installation body according to claim 1, wherein the peripheral wall includes a bottom wall facing the opening and side walls standing from the bottom wall. The lower clamping body is disposed on the outer surface side of the bottom wall at the non-interference position and is configured to be supported at the non-interference position by a finger from the outside of the peripheral wall.

[0012] The wiring device installation body according to claim 6 is the wiring device installation body according to claim 5, wherein a recess is provided in the bottom wall and / or the side wall, recessed inward from the outer edge of the lower clamping body at the non-interference position, and allowing a finger to be placed for supporting the lower clamping body from the outside of the peripheral wall.

[0013] The wiring device installation body according to claim 7 is the wiring device installation body according to any one of claims 1 to 6, wherein the installation body main body and the lower moving body cooperate to restrict the tilting of the screw shaft.

[0014] The wiring device installation body according to claim 8 is the wiring device installation body according to any one of claims 1 to 6, wherein when the lower moving body clamps the wall between the installation body main body and the lower clamping body, the lower moving body presses at least a portion below the screw shaft of the lower clamping body from behind.

[0015] The wiring fixture installation body according to claim 9 is the wiring fixture installation body according to any one of claims 1 to 6, wherein the clamping mechanism is an upper clamping body that abuts from the back side of the wall against an upper peripheral portion located above the lower peripheral portion of the wall hole, further comprising an upper operation portion for operating the upper clamping body, the upper operation portion having a screw shaft that is rotatably operated from the front side of the wall and is rotatably held by the installation main body with the tilting of the screw shaft with respect to the installation main body being restricted. The upper clamping body is characterized in that it is operated by the upper operation portion so as to move toward the wall without moving up and down with respect to the installation main body.

Effect of the Invention

[0016] According to the wiring device installation body described in claim 1, the clamping mechanism is configured to clamp the wall together with the clamping portion on the installation body main body side by being pressed from behind by a lower moving body in which the lower clamping body screws toward the wall by a screwing operation of a lower operating portion having a screw shaft. The screw shaft of the lower operating portion is rotatable idly with respect to the installation body main body and is held by the installation body main body in a state where the tilting of the screw shaft is restricted. That is, since the screw shaft of the lower operating portion is held by the installation body main body so as to rotate idly and not tilt with respect to the lower clamping body, it becomes easy for the user to perform a screwing operation while stably maintaining at least the posture of the lower clamping body. Further, by the relative movement of the lower clamping body with respect to the installation body main body (or the screw shaft), the lower clamping body can move to a non-interference position where it can pass through the wall hole without interfering with the wall and a clamping position where it faces the wall and can clamp the lower part of the peripheral edge of the wall hole. Moreover, the movement of the lower clamping body from the non-interference position to the clamping position is a free fall due to gravity. That is, after the user inserts the lower clamping body through the wall hole while maintaining it in the non-interference position and then releases the hand from the lower clamping body (or simply releases the support), the lower clamping body can be easily arranged at the clamping position by freely falling by its own weight. And the user can easily fix the wiring device installation body to the wall by performing a screwing operation on the lower operating portion without holding the lower clamping body. Thereby, the wiring device installation body can be firmly fixed to the wall, and stable fixing of the wiring device to the wall is also possible. Therefore, the wiring device installation body of the present invention improves the installation work of the wiring device on the wall.

[0017] According to the wiring device installation body described in claim 2, in addition to the effect of the invention of claim 1, by arranging at least a part of the lower clamping body in the internal space at the non-interference position, the portion arranged outside the lower clamping body is reduced, and it is possible to suppress the lower clamping body in the non-interference position from interfering with the installation work. Further, it is possible to confirm from the opening that the lower clamping body is in the non-interference position.

[0018] According to the wiring fixture installation body described in claim 3, in addition to the effects of the invention of claim 2, no matter whether the lower clamping body is in the non-interference position or the clamping position, the user can insert a finger into the internal space (for example, through the opening), hook the finger on the supported portion of the lower clamping body, and support it, so that the lower clamping body can be moved or maintained in the non-interference position. That is, the user can easily operate the lower clamping body.

[0019] According to the wiring fixture installation body described in claim 4, in addition to the effects of the invention of claim 1, since the supported portion of the lower clamping body is supported in the non-interference position by the installation body main body, the user can easily maintain the lower clamping body in the non-interference position without gripping the lower clamping body. Also, by rotating the screw shaft for advancing the lower clamping body to release the support of the lower clamping body, the lower clamping body can be freely dropped from the non-interference position to the clamping position. Therefore, a series of steps in the installation work can be made more efficient.

[0020] According to the wiring fixture installation body described in claim 5, in addition to the effects of the invention of claim 1, the user can support the lower clamping body arranged on the outer surface side of the bottom wall in the non-interference position by a finger from the outside of the peripheral wall in the non-interference position. That is, the user can easily operate the lower clamping body.

[0021] According to the wiring fixture installation body described in claim 6, in addition to the effects of the invention of claim 5, since the bottom wall and / or the side wall are provided with recesses recessed inward from the outer edge of the lower clamping body in the non-interference position, the user can place a finger in the recesses and support the lower clamping body from the outside of the peripheral wall. That is, the user can easily operate the lower clamping body.

[0022] According to the wiring fixture installation body described in claim 7, in addition to the effects of any one of the inventions of claims 1 to 6, since the installation body main body and the lower moving body cooperate to restrict the tilting of the screw shaft, the tilting of the screw shaft can be restricted with a simple structure.

[0023] According to the wiring device installation body described in claim 8, in addition to the effects of the inventions according to any one of claims 1 to 6, since the lower moving body presses the lower clamping body from the rear at a position closer to or above the lower edge of the wall hole than at least the screw axis in the lower clamping body, it is possible to exhibit a stronger clamping force. Incidentally, it is more preferable that the lower moving body is configured to press the wall surface below the inner surface of the lower part of the wall hole.

[0024] According to the wiring device installation body described in claim 9, in addition to the effects of the inventions according to any one of claims 1 to 6, since the upper clamping body always maintains the clamping posture without moving up and down with respect to the installation body main body, the user can sandwich the wall between the installation body main body with the upper clamping body in the clamping posture. That is, the user can insert the wall through the wall hole while maintaining the lower clamping body in the non-interference position, and then, without performing an alignment operation on the upper clamping body, simply let the lower clamping body freely fall, and it is possible to arrange the upper clamping body and the lower clamping body at the clamping position. Thereby, the workability and the stability of installation are further improved.

Brief Description of the Drawings

[0025]

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Embodiment for Carrying Out the Invention

[0026] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the shapes of the respective figures referred to in the following description are conceptual diagrams or schematic diagrams for explaining suitable shape dimensions, and the dimensional ratios etc. do not necessarily match the actual dimensional ratios. That is, the present invention is not limited to the dimensional ratios in the drawings.

[0027] [First Embodiment] The wiring device installation body 100 of an embodiment of the present invention is attached to a wall hole 12 formed at a predetermined position on a wall 11 of a building or the like, and installs the wiring device 16 by exposing and holding it on the wall surface side. That is, the wiring device installation body 100 functions as a so-called wiring box. Further, in the present embodiment, the wiring device 16 is held by an instrument frame 15 and attached to the wiring device installation body 100 via the instrument frame 15. And in the present embodiment, the structure in which the wiring device 16 is installed via the wiring device installation body 100 with respect to the wall hole 12 of the wall 11 is defined as the instrument installation structure 10. Note that in the present embodiment, the wiring device 16 is exemplified as an instrument into which a power plug is inserted, but any instrument such as an instrument into which a communication terminal is inserted or an instrument provided with a switch mechanism can be selected. Since the wiring device 16 is a general instrument, the description of its internal structure and wiring is simplified or omitted. Also, the instrument frame 15 and the wiring device 16 shown here are merely examples, and their forms can be appropriately changed according to the application etc.

[0028] Figs. 1(a) and 1(b) are schematic perspective views of the wiring device installation body 100 showing the form in which the upper clamping body 111 and the lower clamping body 121 are in the non-interference position, as seen from the front and rear. Figs. 2(a) and 2(b) are the front view and the rear view of the wiring device installation body 100 of Fig. 1. Figs. 3(a) to 3(c) are the plan view, the side view, and the bottom view of the wiring device installation body 100 of Fig. 1. Fig. 4 is an exploded perspective view of the wiring device installation body 100 as seen from the front. Fig. 5 is a schematic perspective view of the form in which the upper clamping body 111 and the lower clamping body 121 are in the clamping position, as seen from the rear. Figs. 6 to 9 are cross-sectional views of each part of the wiring device installation body 100. Here, the front side of the wiring device installation body 100 is defined as the front (or the wall surface side), and the opposite side is defined as the rear (or the wall back side). Also, the vertical direction in Fig. 2(a) is defined as the vertical direction or the vertical width, and the horizontal direction is defined as the horizontal direction or the horizontal width.

[0029] As shown in Figs. 1 to 4, the wiring device installation body 100 of this embodiment includes an installation body main body 101, an upper clamping body 111, an upper operation shaft 115 as an upper operation part, a lower clamping body 121, a lower operation shaft 125 as a lower operation part, and a lower moving body 127, and these members are assembled integrally. The wiring device installation body 100 includes a clamping mechanism for fixing the installation body main body 101 inserted into the wall hole 12 to the wall 11 by clamping the periphery of the wall hole 12. This clamping mechanism is composed of an upper clamping mechanism for clamping the upper part of the periphery of the wall hole 12 and a lower clamping mechanism for clamping the lower part of the periphery of the wall hole 12. Here, the clamping part 107, the upper clamping body 111, and the upper operation shaft 115 constitute the upper clamping mechanism, and the clamping part 107, the lower clamping body 121, the lower operation shaft 125, and the lower moving body 127 constitute the lower clamping mechanism. Each component will be described below.

[0030] The installation body main body 101 is configured as a bottomless cylindrical body or housing installed from the wall surface side in the wall hole 12. The installation body main body 101 includes a peripheral wall 102 that defines an internal space inside thereof, and an opening 103 that is formed on the front side of the peripheral wall 102 and allows the internal space to face the outside. Further, the rear surface of the installation body main body 101 is open, and a rear opening is formed on the rear surface side of the peripheral wall 102. Furthermore, an upper opening 108 that allows movement from the internal space of the upper clamping body 111 to the outside is formed at the upper part of the peripheral wall 102, and a lower opening 109 through which the lower clamping body 121 passes is formed at the lower part of the peripheral wall 102. Here, in the front view of the installation body main body 101, a virtual straight line extending vertically passing through the center of the horizontal width is defined as the vertical axis, and a virtual straight line extending horizontally passing through the center of the vertical width is defined as the horizontal axis.

[0031] The front surface (or front wall) of the installation body main body 101 faces the wall surface side, the peripheral wall 102 is inserted into the wall hole 12, and its rear part is arranged on the wall back side. The opening 103 is configured such that its entirety communicates with the wall hole 12. Also, on the front side of the installation body main body 101, a flange projects from at least a part of the outer periphery of the peripheral wall 102. This flange is configured such that its rear surface abuts against the peripheral edge of the wall hole 12 when the peripheral wall 102 is inserted into the wall hole 12. That is, the said flange forms a clamping portion 107 that abuts against the peripheral edge of the wall hole 12 from the wall surface side.

[0032] Also, on the front surface of the installation body main body 101, an appliance frame attachment portion 104 is formed as a pair of upper and lower screw holes for attaching an appliance frame 15 that holds a wiring appliance 16. The appliance frame attachment portion 104 is formed on the upper side and the lower side of the periphery of the opening 103 and consists of a pair of screw holes arranged on the vertical axis. The appliance frame attachment portion 104 is arranged at a position facing the wall surface side when the installation body main body 101 is inserted and installed in the wall hole 12. Nuts (not shown) are provided on the appliance frame attachment portion 104. By screwing a screw passed through the appliance frame 15 (see FIG. 11) from the wall surface side onto the nut provided on the appliance frame attachment portion 104, the appliance frame 15 is fixed to the appliance frame attachment portion 104.

[0033] On the front surface of the installation body main body 101, a pair of through holes 105 are formed. The pair of through holes 105 are respectively formed on the upper side and the lower side of the periphery of the opening 103, and are formed at positions laterally shifted from the vertical axis to one side and the other side respectively. The pair of through holes 105 are each configured to be able to insert the upper operating shaft 115 and the lower operating shaft 125 inserted from the front side in a free-running state. Also, each through hole 105 has a shape that allows the screw shaft to penetrate from the front side and can hold the screw head in the hole so that the front surfaces are flush. On the other hand, on the rear surface side of the peripheral wall 102, there are provided shaft support portions 102c that face the pair of through holes 105 front and rear and support the screw shaft tips of the upper operating shaft 115 or the lower operating shaft 125 inserted into the through holes 105.

[0034] Also, in the internal space of the installation body main body 101, a guide portion 106 for guiding the forward and backward movement of the lower clamping body 121 and / or the lower moving body 127 is provided. The guide portion 106 is a shaft portion that is arranged in parallel with the lower operating shaft 125 inserted into the lower through hole 105 and extends across the front and rear of the internal space. As shown in FIGS. 8(b) and 10(b), the guide portion 106 penetrates through the long hole-shaped notch portion 121a extending vertically on the lower clamping body 121, and is configured to dispose the guided portion 127c of the lower moving body 127 thereon.

[0035] Next, an upper clamping mechanism for clamping the upper peripheral portion of the wall hole 12 together with the installation body main body 101 will be described. The upper clamping mechanism includes an upper clamping body 111 that is disposed on the back side of the wall through the wall hole 12 and abuts against the peripheral portion of the wall hole 12 from the back side of the wall, and an upper operating shaft 115 for driving the upper clamping body 111 by a rotation operation from the front side of the wall.

[0036] The upper clamping body 111 is configured to clamp the wall 11 together with the clamping portion 107. As shown in FIG. 4, the upper clamping body 111 is formed in a plate shape capable of pressing the back surface of the wall 11. The upper clamping body 111 has an upper clamping portion 112 that abuts against the upper part of the periphery of the wall hole 12 from the back side of the wall at its upper part. Further, a screw hole 113 into which the screw shaft of the upper operation shaft 115 is screwed is formed at the center of the lateral width of the lower part of the upper clamping body 111. A part of the upper clamping body 111 is disposed in the internal space, and it can be displaced between a non-interference position where it can pass through the wall hole 12 without interfering with the wall 11 and a clamping position where it can face the wall 11 facing the upper part of the periphery of the wall hole 12. Specifically, in the non-interference position, a part of the upper clamping body 111 is accommodated in the internal space through the upper opening 108 of the peripheral wall 102 of the installation body main body 101. At this time, in the front view shown in FIG. 2(a), it is located inside the outer periphery (outline) of the front surface of the installation body main body 101 and does not protrude outward. On the other hand, as shown in FIG. 5, in the clamping position, the upper clamping body 111 protrudes outward from the outer periphery of the front surface of the installation body main body 101 and can face the wall 11 when the peripheral wall 102 of the installation body main body 101 is inserted into the wall hole 12. In this clamping position, the upper clamping body 111 is disposed outside the peripheral wall 102 and can be screwed forward and backward according to the screwing movement of the upper operation shaft 115.

[0037] The upper operation shaft 115 includes a screw head portion that is rotationally operated from the wall surface side and a screw shaft that extends from the screw head portion. That is, the upper operation shaft 115 can be composed of a general screw material. As shown in FIGS. 7 and 10(a), the screw head portion of the upper operation shaft 115 is accommodated and held in the upper through hole 105 of the installation body main body 101, and the screw shaft is arranged to penetrate and be screwed into the upper clamping body 111. Further, in this upper clamping mechanism, the upper operation shaft 115 is attached or held to the installation body main body 101 while being able to rotate idly with respect to the installation body main body 101 (through hole 105) and with the tilting of the screw shaft being restricted. In particular, since the upper operation shaft 115 penetrates the through hole 105 at its base end side and is pivotally supported by the shaft support portion 102c at its tip end, the tilting of the screw shaft is effectively suppressed. The screw shaft of this upper operation shaft 115 extends from the front surface to the rear surface of the peripheral wall 102 and has a length such that its tip end penetrates the wall hole 12 from the front surface side and protrudes to the wall back side. In other words, the length of the screw shaft is greater than the thickness of the wall 11. Then, the upper operation shaft 115 penetrates the through hole 105 of the installation body main body 101 from the front surface side and is screwed into the screw hole 113 of the upper clamping body 111, thereby connecting the upper clamping body 111 to the installation body main body 101 so as to be able to screw forward or backward. At this time, the upper operation shaft 115 and the upper clamping body 111 are screwed together so as to rotate together by the rotational operation of the upper operation shaft 115. And when the upper operation shaft 115 is further rotationally operated with the rotation of the upper clamping body 111 being restricted, the upper operation shaft 115 rotates screwwise within the screw hole 113 of the upper clamping body 111 and is driven forward and backward along the screw shaft. In addition, since the tip end of the screw shaft of the upper operation shaft 115 is accommodated in the shaft support portion 102c, it is effectively prevented that the upper clamping body 111 detaches rearward from the upper operation shaft 115.

[0038] That is, in the upper clamping mechanism, the upper operating shaft 115 held in the installation body main body 101 through the through hole 105 penetrates the upper clamping body 111, and the upper operating shaft 115 is screwed into the screw hole 113 of the upper clamping body 111, whereby each component of the upper clamping mechanism is operably assembled to the installation body main body 101. The upper operating shaft 115 screwed to the upper clamping body 111 is held by the installation body main body 101 in a state where its tilting is restricted. When fixing the wiring device installation body 100 to the wall 11, it is preferable that the upper clamping body 111 is located on the tip side of the upper operating shaft 115. Further, in the upper clamping mechanism, the upper clamping body 111 is located inside the inner periphery of the front surface of the installation body main body 101 at the non-interference position. Then, when the user performs a screwing operation on the screw head of the upper operating shaft 115 from the wall surface side, the upper clamping body 111 rotates together with the upper operating shaft 115 and rotates to the clamping position through the upper opening 108. Then, when the outer surface of the upper clamping body 111 abuts against the outer surface of the peripheral wall 102, the upper clamping body 111 is locked and further rotation is restricted. At this time, the upper clamping body 111 is in a clamping position where it can clamp the upper part of the peripheral edge of the wall hole 12.

[0039] Then, when the user further performs a screwing operation on the screw head of the upper operating shaft 115 from the wall surface side, it is possible to screw the upper clamping body 111 forward along the screw axis. Specifically, following the screwing of the upper operating shaft 115 in one direction, the upper operating shaft 115 idles with respect to the installation body main body 101 in a state where the tilting of the screw axis is restricted, and the screw axis screws into the screw hole 113 of the upper clamping body 111, whereby the upper clamping body 111 advances toward the wall 11. Incidentally, from the advanced state, by performing a screwing operation of the upper operating shaft 115 in the other direction, the upper clamping body 111 can be retracted and moved to the non-interference position through the upper opening 108.

[0040] Next, a lower clamping mechanism for clamping the lower edge of the peripheral edge of the wall hole 12 together with the installation body main body 101 will be described. The lower clamping mechanism is disposed on the back side of the wall through the wall hole 12, and includes a lower clamping body 121 that abuts against the lower edge of the peripheral edge of the wall hole 12 from the back side of the wall, a lower operation shaft 125 for operating the lower clamping body 121 by a rotation operation from the front side of the wall, and a lower moving body 127 that moves so as to press the lower clamping body 121 from the rear in accordance with the screw rotation operation of the lower operation shaft 125.

[0041] The lower clamping body 121 is configured to clamp the wall 11 together with the clamping portion 107. As shown in FIG. 4, the lower clamping body 121 is formed as a plate having a substantially semicircular shape capable of pressing the back surface of the wall 11. The lower clamping body 121 has a lower clamping portion 122 that abuts against the lower edge of the peripheral edge of the wall hole 12 from the back side of the wall at its lower portion. A long hole 123 through which the screw shaft of the lower operation shaft 125 is inserted in an idle state is formed in the lower clamping body 121. The long hole 123 extends in the vertical direction and has a closed upper end and a lower end. The long hole 123 is configured to loosely insert the screw shaft of the lower operation shaft 125 and allow a free relative movement in the vertical direction of the screw shaft (that is, the self-weight fall of the lower clamping body 121).

[0042] In addition, a notch portion 121a for penetrating and disposing the guide portion 106 is formed in the lower clamping body 121 so as to extend vertically. The guide portion 106 is disposed in the notch portion 121a (see FIG. 9). The notch portion 121a is substantially the same length as the long hole 123 and is arranged in parallel. The notch portion 121a functions as a guided portion for moving the lower clamping body 121 in the front-rear direction (perpendicular to the wall surface) along the guide portion 106. Further, the notch portion 121a functions as a co-rotation restricting portion that restricts the lower clamping body 121 from co-rotating about the lower operation shaft 125 by the engagement of its inner surface with the guide portion 106. Furthermore, the notch portion 121a extends from the vicinity of the upper edge to the vicinity of the lower edge of the lower clamping body 121. Thereby, the vertical relative movement within the notch portion 121a of the guide portion 106 is allowed. In other words, the lower clamping body 121 is held so as to be relatively movable in the vertical direction with respect to the installation body main body 101.

[0043] And as shown in FIG. 8, the lower clamping body 121 is movable up and down between a non-interference position where the lower clamping portion 122 (formed on its front surface) is located relatively above the installation body main body 101 and a clamping position where the lower clamping portion 122 is located relatively below the installation body main body 101. In the non-interference position, at least a part (here, most part) of the lower clamping body 121 is disposed in the internal space of the installation body main body 101 and is located inside so as not to protrude from the outer periphery of the front surface of the installation body main body 101, and in the clamping position, it protrudes below the installation body main body 101. Further, since the long hole 123 of the lower clamping body 121 extends linearly, it is configured to slide linearly downward (move parallelly) while maintaining its posture when moving from the non-interference position to the clamping position.

[0044] In addition, a semi-annular supported portion 124 is provided at the upper portion of the lower clamping body 121. The supported portion 124 is a tab and has a semi-circular hole into which a person's finger can be inserted. That is, the supported portion 124 is configured as a finger-hooking portion that is supported by hooking a finger inserted into the internal space. That is, by the user hooking a finger on the supported portion 124 to support or hold it, it is possible to maintain the lower clamping body 121 in the non-interference position. And as shown in FIGS. 8 and 9, the supported portion 124 can be finger-hooked within the internal space in both the non-interference position and the clamping position. Specifically, the supported portion 124 faces the outside from the internal space through the opening 103 and the rear opening in both the non-interference position (upper position) and the clamping position (lower position). Thereby, the user can insert a finger into the internal space from the outside of the installation body main body 101, support the supported portion 124, and move the lower clamping body 121 between the non-interference position and the clamping position. Note that the supported portion 124 is preferably formed at a position and size that do not interfere with the wiring device 16 disposed in the internal space.

[0045] The lower operating shaft 125 includes a screw head portion that is rotationally operated from the wall surface side, and a screw shaft extending from the screw head portion. That is, the lower operating shaft 125 can be composed of a general screw material. As shown in FIGS. 6, 8(a), and 10(b), the screw head portion of the lower operating shaft 125 is accommodated and held in the lower through-hole 105 of the installation body main body 101, and the screw shaft is arranged so as to penetrate the lower clamping body 121. Further, in this lower clamping mechanism, the lower operating shaft 125 is attached or held to the installation body main body 101 while being able to idle with respect to the lower clamping body 121 (elongated hole 123) and the installation body main body 101 (through-hole 105), and the tilting of the screw shaft is restricted. In particular, the lower operating shaft 125 penetrates the through-hole 105 at its proximal end side and is pivotally supported by the shaft support portion 102c at its distal end side, whereby the tilting of the screw shaft is effectively suppressed. The screw shaft of the lower operating shaft 125 extends from the front surface to the rear surface of the peripheral wall 102, and its distal end has a length that penetrates the wall hole 12 from the front surface side and protrudes to the wall back side. In other words, the length of the screw shaft is larger than the thickness of the wall 11. And, as shown in FIGS. 8(a) and 10(b), the lower operating shaft 125 penetrates the through-hole 105 of the installation body main body 101 from the front surface side and penetrates the elongated hole 123 of the lower clamping body 121, thereby connecting the lower clamping body 121 to be slidable back and forth with respect to the installation body main body 101. Further, the screw shaft of the lower operating shaft 125 is screwed into the lower moving body 127 on the distal end side of the lower clamping body 121. Since the distal end of the screw shaft of the lower operating shaft 125 is received in the shaft support portion 102c, the lower clamping body 121 and the lower moving body 127 are effectively prevented from detaching from the lower operating shaft 125.

[0046] Also, as shown in FIGS. 8(a) and 9, the screw shaft of the lower operation shaft 125 is inserted into the long hole 123 so as to be freely relatively movable in the vertical direction. Then, due to the self-weight fall of the lower clamping body 121, it is possible for the screw shaft to move from the lower end to the upper end of the long hole 123 while being inserted into the long hole 123. That is, in the natural state (clamping position), the screw shaft of the lower clamping body 121 is located at the upper end within the long hole 123 and is suspended by the lower operation shaft 125. And the lower clamping body 121 can be lifted by the user, causing the screw shaft to relatively move to the lower end within the long hole 123 and move to an upper position (non-interference position) so as to be close to the upper clamping body 111.

[0047] The lower moving body 127 is screwed onto the lower operating shaft 125 behind the lower clamping body 121, and is configured to screw forward toward the wall 11 in accordance with the rotation of the screw shaft in one direction, and press the lower clamping body 121 from the rear. As shown in FIG. 4, the lower moving body 127 is composed of a plate piece smaller than the lower clamping body 121. The lower moving body 127 has a threaded engaging portion 127a in the shape of a threaded hole that engages with the screw shaft of the lower operating shaft 125. Further, a pressing portion 127b for pressing the rear surface of the lower clamping body 121 is formed on the front surface of the lower moving body 127. This pressing portion 127b extends and extends below the threaded engaging portion 127a, and is configured to press a portion below the long hole 123 (screw shaft) in the lower clamping body 121. Here, the pressing portion 127b of the lower moving body 127 may be formed to extend further downward so as to press a wall surface below the inner surface of the lower portion of the wall hole 12. Further, a guided portion 127c is provided on one side portion of the lower moving body 127. The guided portion 127c is a pin-shaped protrusion that protrudes laterally. The guided portion 127c is supported from below by the guide portion 106 of the installation body main body 101, and is configured to be guidable so that the lower moving body 127 linearly moves back and forth while maintaining its posture horizontally. Specifically, as shown in FIGS. 8(b) and 10(b), the guided portion 127c of the lower moving body 127 is disposed on the guide portion 106. Since the lower moving body 127 is supported at two locations, the guide portion 106 and the lower operating shaft 125, the tilting (rotation about the screw shaft or inclination back and forth) of the lower moving body 127 is restricted, and its pressable posture is maintained. That is, the lower moving body 127 is restricted from rotating together in accordance with the rotation of the lower operating shaft 125.

[0048] That is, in the lower clamping mechanism, the lower operating shaft 125 held in the installation body main body 101 via the through hole 105 penetrates the lower clamping body 121, and the lower operating shaft 125 is screwed to the lower moving body 127 supported by the guide portion 106, whereby each component of the lower clamping mechanism is operably assembled to the installation body main body 101. Since the lower moving body 127 is supported by the guide portion 106 in a state where movement and tilting other than in the front-rear direction are restricted, the lower operating shaft 125 screwed to the lower moving body 127 is also held by the installation body main body 101 in a state where tilting is restricted in the same manner. Further, when the lower moving body 127 is screwed to the tip of the lower operating shaft 125, the lower clamping body 121 is movable in the axial direction and the vertical direction of the lower operating shaft 125. When fixing the wiring device installation body 100 to the wall 11, it is preferable that both the lower clamping body 121 and the lower moving body 127 are located on the tip side of the lower operating shaft 125. Further, in the lower clamping mechanism, the lower clamping body 121 is, in a natural state, located below the installation body main body 101 and is in a clamping position where it can clamp the lower part of the periphery of the wall hole 12. This lower clamping body 121 is held by the installation body main body 101 in a state where vertical movement and movement in the front-rear direction are allowed. That is, the lower clamping body 121 can move between an upper non-interference position where it can pass through the wall hole 12 without interfering with the wall 11 due to the relative movement of the screw shaft in the long hole 123 and a lower clamping position where it can clamp the lower part of the periphery of the wall hole 12 together with the installation body main body 101. And it can be displaced from the non-interference position to the clamping position by the free fall of the lower clamping body 121.

[0049] Also, when the lower clamping body 121 is in the clamping position, by the user performing a screwing operation on the screw head of the lower operation shaft 125 from the wall surface side, as shown by the phantom line in FIG. 8, both the lower clamping body 121 and the lower moving body 127 (in the clamping position) can be screwed forward along the screw axis. Specifically, as the lower operation shaft 125 rotates in one direction, the lower operation shaft 125 idles with respect to the installation body main body 101 and the lower clamping body 121 while the inclination of the screw axis is restricted, and the screw axis screws into the screwing portion 127a of the lower moving body 127. By the screwing engagement of the lower operation shaft 125 and the lower moving body 127, only the lower moving body 127 advances along the screw axis. Then, the pressing portion 127b of the advancing lower moving body 127 pushes the rear surface of the lower clamping body 121 in the clamping position by its own weight, so that the lower clamping body 121 can be advanced toward the wall 11.

[0050] Next, with reference to FIGS. 11 to 14, a fixture installation structure 10 in which a wiring fixture 16 is installed in a wall hole 12 of a wall 11 will be described. FIG. 11 is a schematic perspective view seen from the wall surface showing the fixture installation structure 10. FIG. 12 is a schematic front view seen from the wall surface showing the fixture installation structure 10. FIG. 13 is a schematic rear view seen from the back of the wall of the fixture installation structure 10. FIG. 14 is a cross-sectional view taken along line F-F of the fixture installation structure 10. Since the wiring fixture 16 is a general fixture such as a switch or a socket, the description of its internal structure and wiring is simplified or omitted.

[0051] In the fixture installation structure 10, the installation body main body 101 of the wiring fixture installation body 100 is installed in a wall hole 12 formed in the wall 11. As shown in FIG. 12, the clamping portion 107 of the installation body main body 101 abuts against the periphery of the wall hole 12 from the wall surface. Also, the opening 103 of the installation body main body 101 communicates with the wall hole 12, the fixture frame 15 is fitted to the fixture frame attachment portion 104, and the wiring fixture 16 is disposed so as to face the wall surface. As shown in FIG. 14, the upper operation shaft 115 and the lower operation shaft 125 of the wiring fixture installation body 100 penetrate the wall hole 12 and their tips extend to the back side of the wall. These upper operation shaft 115 and lower operation shaft 125 extend perpendicular to the wall surface without taking an inclined posture.

[0052] At the upper periphery of the wall hole 12, as shown in FIGS. 13 and 14, the upper clamping body 111 is arranged on the back side of the wall, and the wall 11 is clamped by the upper clamping portion 112 and the clamping portion 107 of the installation body main body 101. The upper clamping portion 112 is in contact with the wall 11 at a position deviated from the clamping portion 107. That is, in the appliance installation structure 10, the upper clamping body 111 and the installation body main body 101 cooperate to firmly clamp the upper periphery of the wall hole 12. On the other hand, at the lower periphery of the wall hole 12, as shown in FIGS. 13 and 14, the lower clamping body 121 and the lower moving body 127 are arranged on the back side of the wall, and the wall 11 is clamped by the lower clamping portion 122 and the clamping portion 107 of the installation body main body 101. The lower clamping portion 122 is in contact with the wall 11 at a position deviated from the clamping portion 107. Further, the pressing portion 127b of the lower moving body 127 presses the lower moving body 127 from the rear at a position below the lower operation shaft 125 and closer to the contact portion between the lower clamping portion 122 and the wall surface. At this time, since the lower operation shaft 125 is not tilted, the lower clamping portion 122 is firmly in contact with the wall surface. That is, the pressing force from the lower moving body 127 is effectively transmitted to the lower clamping body 121, and the lower clamping portion 122 is firmly pressed against the wall surface. As a result, in the appliance installation structure 10, the lower clamping body 121 and the installation body main body 101 cooperate to firmly clamp the lower periphery of the wall hole 12. Therefore, in the appliance installation structure 10, the wiring appliance 16 is stably installed on the wall 11.

[0053] Subsequently, a method for constructing the appliance installation structure 10 by installing the wiring appliance installation body 100 and the wiring appliance 16 in the wall hole 12 formed in the wall 11 will be described.

[0054] First, as shown in FIG. 15, the user grips the wiring device installation body 100 on the wall surface side so that the upper (lower) part of the wiring device installation body 100 is located vertically above (below). At this time, it is preferable to grip the wiring device installation body 100 with the end of the cable drawn out from the wall hole 12 accommodated inside the peripheral wall 102. Then, the lower clamping body 121 is lifted vertically upward and displaced from the clamping position (natural state) to the non-interference position. As shown in FIG. 16, the user can easily operate the lower clamping body 121 by inserting a finger into the internal space through the opening 103 and hooking the finger (finger tip) on the supported portion 124. At this time, the upper clamping body 111 is accommodated in the non-interference position. When the lower clamping body 121 is in the non-interference position, the distance between the upper end of the wiring device installation body 100 and the lower clamping body 121 becomes the minimum, and it becomes possible to pass the wiring device installation body 100 through the wall hole 12 without interfering with the wall 11.

[0055] Then, as shown in FIG. 16, the user can pass the rear side of the peripheral wall 102 through the wall hole 12 by inserting the peripheral wall 102 into the wall hole 12 from the front. After arranging the upper clamping body 111 and the lower clamping body 121 behind the wall through the wall hole ¹², the rear surface of the clamping portion 107 of the wiring device installation body 100 is brought into contact with the wall surface from the wall surface. Note that the instrument frame 15 holding the wiring device 16 may be attached to the instrument frame attachment portion 104 in advance. In this case, the lower clamping body 121 in the non-interference position is arranged at a position that also avoids interference with the wiring device 16 disposed in the internal space. Specifically, the guide portion 106 and the lower operation shaft 125 extend further rearward than the rear surface of the wiring device 16 to be attached, so that the lower clamping body 121 can be arranged behind the wiring device 16. Also, when the instrument frame 15 holding the wiring device 16 is attached to the instrument frame attachment portion 104 in advance, since the supported portion 124 interferes with the wiring device 16, while supporting the lower clamping body 121 from below or side of the wiring device installation body 100 to maintain it in the non-interference position and pushing it into the wall hole 12, when the hand-released lower clamping body 121 passes through the wall hole 12, it falls by its own weight to the interference position.

[0056] After at least inserting the lower clamping body 121 into the wall through the wall hole 12 and then releasing the hand from the lower clamping body 121 disposed on the back of the wall, as shown in FIG. 17, the lower clamping body 121 drops by its own weight and displaces from the non-interference position to the clamping position. Subsequently, as shown in FIG. 18, the upper operation shaft 115 is rotationally operated to displace the upper clamping body 111 to the clamping position. Then, it is disposed at a position facing the upper part of the peripheral edge of the wall hole 12 on the back of the wall, and the lower clamping body 121 is also disposed at a position facing the lower part of the peripheral edge of the wall hole 12. Here, after the upper clamping body 111 is displaced to the clamping position, since the posture capable of clamping the wall 11 is always maintained, the user can easily perform the positioning operation of the upper clamping body 111 and the lower clamping body 121 without gripping either the upper clamping body 111 or the lower clamping body 121.

[0057] Subsequently, while maintaining the installation position of the wiring device installation body 100, the user fixes the wiring device installation body 100 to the wall 11 by operating the upper clamping mechanism and the lower clamping mechanism respectively.

[0058] Specifically, as shown in FIG. 19(a), by rotating the screw head of the upper operation shaft 115 in one direction from the wall surface with a driver 17 (tool), the upper clamping body 111 screws in so as to approach the wall 11. At this time, since the tilting of the screw shaft of the upper operation shaft 115 is restricted, it is easy for the user to perform the screwing operation while stably maintaining the posture of the upper clamping body 111. Then, when the user further rotates with a strong force in a state where the upper clamping portion 112 of the upper clamping body 111 abuts against the upper part of the peripheral edge of the wall hole 12, a tightening torque is generated, and the upper clamping portion 112 is pressed against the wall 11, and the wall 11 can be clamped in cooperation with the installation body main body 101.

[0059] As shown in Fig. 19(b), by rotating the screw head of the lower operating shaft 125 in one direction with a driver 17 (tool) from the wall surface, the lower moving body 127 advances in a screw-like manner while pushing the lower clamping body 121 from the rear toward the wall 11. At this time, since the tilting of the screw shaft of the lower operating shaft 125 is restricted, it is easy for the user to perform the screwing operation while stably maintaining the posture of the lower clamping body 121. Then, when the user further rotates with a strong force in a state where the lower clamping portion 122 of the lower clamping body 121 abuts against the lower edge of the periphery of the wall hole 12, a tightening torque is generated, and the lower clamping portion 122 is pressed against the wall 11, so that the wall 11 can be clamped in cooperation with the installation body main body 101.

[0060] That is, the user can easily perform the screwing operation without holding either the upper clamping body 111 or the lower clamping body 121. As a result, the installation body main body 101, the upper clamping body 111, and the lower clamping body 121 cooperate to clamp the wall 11, and the wiring device installation body 100 is firmly fixed to the wall 11. Then, the user can construct the device installation structure 10 by fixing the device frame 15 that holds the wiring device 16 to the device frame attachment portion 104 of the wiring device installation body 100 with screws.

[0061] Hereinafter, the effects of the wiring device installation body 100 according to an embodiment of the present invention will be described.

[0062] According to the wiring device installation body 100 of the present embodiment, at least the lower clamping body 121 is pressed from the rear by a lower moving body 127 that screws forward toward the wall 11 by a screwing operation of a lower operating shaft 125 having a screw shaft, so as to clamp the wall 11 together with the installation body main body 101. The screw shaft of the lower operating shaft 125 is rotatable freely with respect to the lower clamping body 121 and the installation body main body 101, and is attached to the installation body main body 101 in a state where the tilting of the screw shaft is restricted. That is, since the screw shaft of the lower operating shaft 125 is held by the installation body main body 101 so as not to rotate freely and tilt with respect to the lower clamping body 121, it becomes easy for the user to perform the screwing operation while stably maintaining at least the posture of the lower clamping body 121. Further, by the relative vertical movement of the screw shaft within the long hole 123 provided in the lower clamping body 121, the lower clamping body 121 can move to a non-interference position where it can pass through the wall hole 12 without interfering with the wall 11, and a clamping position where it can clamp the lower peripheral edge of the wall hole 12 together with the installation body main body 101. Moreover, the lower clamping body 121 can be displaced from the non-interference position to the clamping position by free fall. That is, after the user inserts the lower clamping body 121 through the wall hole 12 while maintaining it in the non-interference position and then arranges the upper clamping body 111 in the clamping position and simply releases the hand from the lower clamping body 121, the lower clamping body 121 can be easily arranged in the clamping position by its own weight fall. And the user can easily fix the wiring device installation body 100 to the wall 11 by performing a screwing operation on the lower operating shaft 125 without holding the lower clamping body 121. Furthermore, since it becomes easy to align the upper clamping body 111 and the lower clamping body 121, it becomes possible to arrange the upper clamping body 111 and the lower clamping body 121 evenly with respect to the peripheral edge of the wall hole 12. Thereby, the wiring device installation body 100 can be firmly fixed to the wall, and stable fixing of the wiring device 16 to the wall 11 is also possible. Therefore, the wiring device installation body 100 of the present embodiment improves the installation work of the wiring device 16 on the wall 11.

[0063] The present invention is not limited to the above-described embodiments and can take various embodiments. Hereinafter, another embodiment of the present invention will be described. In each embodiment, components with the same last two digits among the components indicated by three digits have the same or similar features unless otherwise described, and the description thereof will be partially omitted.

[0064] [Second Embodiment] A wiring device installation body 200 according to another embodiment (second embodiment) of the present invention will be described. FIGS. 20(a) and (b) are schematic perspective views of the wiring device installation body 200 as seen from the front and rear, showing a form in which the upper clamping body 211 and the lower clamping body 221 are in non-interfering positions. FIGS. 21(a) and (b) are front and rear views of the wiring device installation body 200 of FIG. 20. FIGS. 22(a) to (c) are a plan view, a side view, and a bottom view of the wiring device installation body 200 of FIG. 20. FIG. 23 is an exploded perspective view of the wiring device installation body 200 as seen from the front. FIG. 24 is a schematic perspective view of the form in which the lower clamping body 221 is in the clamping position as seen from the rear. FIGS. 25 to 29 are cross-sectional views of each part of the wiring device installation body 200. Here, the front side of the wiring device installation body 200 is defined as the front (or the wall surface side), and the opposite side is defined as the rear (or the wall back side). Also, the vertical direction in FIG. 21(a) is defined as the vertical direction or the vertical width, and the horizontal direction is defined as the horizontal direction or the horizontal width.

[0065] As shown in FIGS. 20 to 23, the wiring device installation body 200 of the present embodiment includes an installation body main body 201, an upper clamping body 211, an upper operation shaft 215, a lower clamping body 221, a lower operation shaft 225, and a lower moving body 227, and these members are assembled into one body. The wiring device installation body 200 includes a clamping mechanism for fixing the installation body main body 201 inserted into the wall hole 12 to the wall 11 by clamping the peripheral edge of the wall hole 12. The clamping mechanism is composed of an upper clamping mechanism for clamping the upper part of the peripheral edge of the wall hole 12 and a lower clamping mechanism for clamping the lower part of the peripheral edge of the wall hole 12. Here, the clamping part 207, the upper clamping body 211, and the upper operation shaft 215 constitute the upper clamping mechanism, and the clamping part 207, the lower clamping body 221, the lower operation shaft 225, and the lower moving body 227 constitute the lower clamping mechanism. Hereinafter, each component will be described.

[0066] The installation body main body 201 is configured as a bottomless cylindrical body or a housing attached from the wall surface side to the periphery of the wall hole 12. The installation body main body 201 includes a peripheral wall 202 that defines an internal space inward, and an opening 203 that is formed on the front side of the peripheral wall 202 and faces the external with the internal space. The peripheral wall 202 includes a bottom wall 202a that forms the rear surface and faces the opening 203, and side walls 202b that stand up from the bottom wall 202a. Although not shown, a cable inlet may be formed at any location on the bottom wall 202a or the left and right side walls 202b. Further, an upper opening 208 that allows the front and rear movement of the upper clamping body 211 is formed on the upper surface of the side wall 202b, and a lower opening 209 through which the lower clamping body 221 passes is formed on the lower surface of the side wall 202b.

[0067] The front surface (or front wall) of the installation body main body 201 faces the wall surface side, and the peripheral wall 202 is configured to be inserted into the wall hole 12 and arranged on the wall back side. The opening 203 is configured such that its entirety communicates with the wall hole 12. Further, a flange projects from at least a part of the outer periphery of the peripheral wall 202 on the front side of the installation body main body 201. This flange is configured such that its rear surface abuts against the periphery of the wall hole 12 when the peripheral wall 202 is inserted into the wall hole 12. That is, the flange forms a clamping portion 207 that abuts against the periphery of the wall hole 12 from the wall surface side.

[0068] Further, on the front surface of the installation body main body 201, an appliance frame attachment portion 204 is formed as a pair of upper and lower screw holes for attaching an appliance frame 15 that holds the wiring appliance 16. The appliance frame attachment portion 204 is formed on the upper side and the lower side of the periphery of the opening 203 and consists of a pair of screw holes arranged on the vertical axis.

[0069] On the front surface of the installation body main body 201, a pair of through holes 205 are formed. The pair of through holes 205 are formed on the upper side and the lower side of the periphery of the opening 203 respectively, and are formed at positions shifted left and right from the vertical axis respectively. The pair of through holes 205 are each configured to be able to internally insert the upper operating shaft 215 and the lower operating shaft 225 inserted from the front side in a freely rotating state. Further, each through hole 205 has a shape that allows the screw shaft to penetrate from the front side and can hold the screw head in the hole so that the front surfaces are flush. On the other hand, on the rear surface side of the peripheral wall 202, a shaft support portion 202c for supporting the tip of the screw shaft of the upper operating shaft 215 inserted into the through hole 205 is provided, which is opposed to the upper through hole 205 in the front-rear direction.

[0070] Also, in the internal space of the installation body main body 201, a guide portion 206 for guiding the forward and backward movement of the lower clamping body 221 and / or the lower moving body 227 is provided. The guide portion 206 is provided on the inner surface of the side walls 202b facing each other in the lateral direction, and is a pair of concave ridges extending parallel to each other in the front-rear direction. As shown in FIG. 23, the guide portion 206 is configured to dispose a pair of guided portions 227c of the lower moving body 227 in the groove.

[0071] Furthermore, in the internal space of the installation body main body 201, a support portion 202e for supporting the lower clamping body 221 in the clamping position is provided. The support portion 202e consists of a pair of pins protruding from the inner surface of the bottom wall 202a into the internal space. As shown in FIG. 27, when the lower clamping body 221 is located on the rear side, the support portion 202e is inserted into the long hole 223 and the notch portion 221a of the lower clamping body 221 respectively, and is configured to support the lower clamping body 221.

[0072] Next, an upper clamping mechanism for clamping the upper part of the periphery of the wall hole 12 together with the installation body main body 201 will be described. The upper clamping mechanism includes an upper clamping body 211 disposed on the back side of the wall through the wall hole 12 and contacting the peripheral portion of the wall hole 12 from the back side of the wall, and an upper operating shaft 215 for driving the upper clamping body 211 by a rotation operation from the front side of the wall.

[0073] The upper clamping body 211 is configured to clamp the wall 11 together with the clamping portion 207. As shown in FIG. 23, the upper clamping body 211 is formed in a rectangular plate shape capable of pressing the back surface of the wall 11. The upper clamping body 211 has an upper clamping portion 212 that abuts against the upper part of the periphery of the wall hole 12 from the back side of the wall at its upper part. Further, a screw hole 213 into which the screw shaft of the upper operation shaft 215 is screwed is formed at the center of the lateral width of the lower part of the upper clamping body 211. As shown in FIGS. 25 and 26, the upper clamping body 211 protrudes above the peripheral wall 202 through the upper opening 208 and is always arranged at a clamping position where it can face the upper part of the periphery of the wall hole 12 and clamp the wall 11. In other words, the upper clamping body 211 is held by the installation body main body 201 in a state where only movement in the front-rear direction is allowed, and movement in the vertical direction and rotation about the screw shaft are restricted. The upper clamping body 211 can advance and retract in the front-rear direction according to the screwing rotation of the upper operation shaft 215 while maintaining this clamping position. That is, the upper clamping body 211 always maintains a posture (clamping position) in which it can clamp the wall 11 together with the installation body main body 201.

[0074] The upper operating shaft 215 includes a screw head portion that is rotationally operated from the wall surface side, and a screw shaft that extends from the screw head portion. That is, the upper operating shaft 215 can be composed of a general screw material. As shown in FIGS. 26 and 29(a), the screw head portion of the upper operating shaft 215 is accommodated and held in the upper through-hole 205 of the installation body main body 201, and the screw shaft is arranged to penetrate and be screwed into the upper clamping body 211. Further, in this upper clamping mechanism, the upper operating shaft 215 is attached or held to the installation body main body 201 while being able to idle with respect to the installation body main body 201 (through-hole 205) and with the tilting of the screw shaft being restricted. In particular, since the upper operating shaft 215 penetrates the through-hole 205 at its base end side and is pivotally supported by the shaft support portion 202c at its tip end, the tilting of the screw shaft is effectively suppressed. The screw shaft of this upper operating shaft 215 extends from the front surface to the rear surface of the peripheral wall 202, and its tip end has a length that penetrates the wall hole 12 from the front surface side and protrudes to the back side of the wall. In other words, the length of the screw shaft is greater than the thickness of the wall 11. Then, the upper operating shaft 215 penetrates the through-hole 205 of the installation body main body 201 from the front surface side and is screwed into the screw hole 213 of the upper clamping body 211, thereby connecting the upper clamping body 211 to the installation body main body 201 so as to be capable of screwing forward or backward. Since the rotation of the upper clamping body 211 is restricted, when the upper operating shaft 215 is rotationally operated, the upper operating shaft 215 screws and rotates within the screw hole 213 of the upper clamping body 211 and is driven forward and backward along the screw shaft. In addition, since the tip end of the screw shaft of the upper operating shaft 215 is contained in the shaft support portion 202c, the upper clamping body 211 is effectively prevented from detaching rearward from the upper operating shaft 215.

[0075] That is, in the upper clamping mechanism, the upper operating shaft 215 held in the installation body main body 201 through the through hole 205 penetrates the upper clamping body 211, and the upper operating shaft 215 is screwed into the screw hole 213 of the upper clamping body 211, whereby each component of the upper clamping mechanism is operably assembled to the installation body main body 201. The upper operating shaft 215 screwed to the upper clamping body 211 is held by the installation body main body 201 in a state where its tilting is restricted. When fixing the wiring fixture installation body 200 to the wall 11, it is preferable that the upper clamping body 211 is located on the tip side of the upper operating shaft 215. Then, by the user performing a screwing operation on the screw head of the upper operating shaft 215 from the wall front side, it is possible to screw the upper clamping body 211 forward along the screw axis. Specifically, following the screwing of the upper operating shaft 215 in one direction, the upper operating shaft 215 idles relative to the installation body main body 201 in a state where the tilting of the screw axis is restricted, and the screw axis screws into the screw hole 213 of the upper clamping body 211, so that the upper clamping body 211 advances toward the wall 11.

[0076] Next, a lower clamping mechanism for clamping the lower periphery of the wall hole 12 together with the installation body main body 201 will be described. The lower clamping mechanism is disposed on the back side of the wall through the wall hole 12, and includes a lower clamping body 221 that abuts against the lower periphery of the wall hole 12 from the back side of the wall, a lower operating shaft 225 for operating the lower clamping body 221 by a rotation operation from the front side of the wall, and a lower moving body 227 that moves so as to press the lower clamping body 221 from the rear according to the screwing operation of the lower operating shaft 225.

[0077] The lower clamping body 221 is configured to clamp the wall 11 together with the clamping portion 207. As shown in FIG. 23, the lower clamping body 221 is formed as a rectangular plate capable of pressing the back surface of the wall 11. The lower clamping body 221 has a lower clamping portion 222 at its lower portion that abuts against the lower part of the periphery of the wall hole 12 from the back side of the wall. A long hole 223 is formed in the lower clamping body 221 through which the threaded shaft of the lower operating shaft 225 is inserted in an idling state. The long hole 223 extends in the vertical direction and has an upper end and a lower end. This long hole 223 is configured to loosely insert the threaded shaft of the lower operating shaft 225 and allow free relative movement in the vertical direction of the threaded shaft (i.e., the self-weight fall of the lower clamping body 221).

[0078] Further, a notch portion 221a is formed in the lower clamping body 221 so as to extend vertically. The notch portion 221a is arranged in parallel with the long hole 223 and has substantially the same length. The notch portion 221a functions as an engaged portion with which an engaging convex portion 227d protruding from the front surface of the lower moving body 227 engages. Also, the inner surface of the notch portion 221a engages with the engaging convex portion 227d, so that the notch portion 221a also functions as a co-rotation restricting portion that restricts the lower clamping body 221 from co-rotating about the lower operating shaft 225. Further, the notch portion 221a extends from near the upper edge to near the lower edge of the lower clamping body 221. Thereby, vertical relative movement of the engaging convex portion 227d within the notch portion 221a is allowed. In other words, the lower clamping body 221 is held so as to be relatively movable in the vertical direction with respect to the installation body main body 201 and the lower moving body 227 (see FIG. 27).

[0079] Then, as shown in FIG. 27, the lower clamping body 221 is movable vertically between a non-interference position where the lower clamping portion 222 (formed on its front surface) is relatively above the installation body main body 201 and a clamping position where the lower clamping portion 222 is relatively below the installation body main body 201. In the non-interference position, substantially the entire lower clamping body 221 is disposed in the internal space so as not to protrude from the outer periphery of the front surface of the installation body main body 201, and in the clamping position, it is disposed so as to protrude below the installation body main body 201.

[0080] Further, the lower clamping body 221 is provided with a supported portion 224 that is supported by the pin-shaped support portion 202e of the installation body main body 201. The supported portion 224 is defined on the upper inner peripheral surface of the long hole 223 and the notch portion 221a. That is, as shown in FIGS. 27(b) and 28, when the lower clamping body 221 is located on the rear side, the support portion 202e engages with the supported portion 224, so that the lower clamping body 221 is supported at the upper non-interference position in a state where free fall is restricted. Then, when the lower clamping body 221 moves forward by the rotation operation of the screw shaft of the lower operation shaft 225, the supported portion 224 disengages from the support portion 202e, the support is released, and the lower clamping body 221 is configured to freely fall from the non-interference position to the clamping position.

[0081] The lower operation shaft 225 includes a screw head that is rotationally operated from the wall surface side and a screw shaft that extends from the screw head. That is, the lower operation shaft 225 can be composed of a general screw material. As shown in FIGS. 25, 27(a), and 29(b), the screw head of the lower operation shaft 225 is accommodated and held in the lower through hole 205 of the installation body main body 201, and the screw shaft is arranged so as to penetrate the lower clamping body 221. Further, in this lower clamping mechanism, the lower operation shaft 225 is attached or held to the installation body main body 201 while being rotatable relative to the lower clamping body 221 (long hole 223) and the installation body main body 201 (through hole 205), and the tilting of the screw shaft is restricted. The screw shaft of the lower operation shaft 225 extends from the front surface to the rear surface of the peripheral wall 202, and its tip has a length that penetrates the wall hole 12 from the front surface side and protrudes to the wall back side. In other words, the length of the screw shaft is greater than the thickness of the wall 11. Then, as shown in FIGS. 27(a) and 29(b), the lower operation shaft 225 penetrates the through hole 205 of the installation body main body 201 from the front surface side and penetrates the long hole 223 of the lower clamping body 221, thereby connecting the lower clamping body 221 to the installation body main body 201 so as to be slidable back and forth. Further, the screw shaft of the lower operation shaft 225 is screwed into the lower moving body 227 on the tip side of the lower clamping body 221.

[0082] Also, as shown in FIGS. 27(a) and 28, the screw shaft of the lower operation shaft 225 is inserted into the long hole 223 so as to be freely movable relative to each other in the vertical direction. Then, due to the self-weight fall of the lower clamping body 221, the screw shaft can move from the lower end to the upper end of the long hole 223 in a state where it is inserted into the long hole 223. That is, at the clamping position, the screw shaft of the lower clamping body 221 is located at the upper end within the long hole 223 and is suspended by the lower operation shaft 225. Then, when the lower clamping body 221 is lifted from below by the user, the screw shaft relatively moves to the lower end within the long hole 223, and it can move to an upper position (non-interference position) so as to approach the upper clamping body 211.

[0083] The lower moving body 227 is screwed onto the lower operating shaft 225 behind the lower clamping body 221, and is configured to screw forward toward the wall 11 in accordance with the rotation of the screw shaft in one direction, and press the lower clamping body 221 from the rear. As shown in FIG. 23, the lower moving body 227 is formed of a rectangular plate piece smaller than the lower clamping body 221. The lower moving body 227 has a threaded engagement portion 227a in the form of a threaded hole that engages with the screw shaft of the lower operating shaft 225. Further, a pressing portion 227b for pressing the rear surface of the lower clamping body 221 is formed on the front surface of the lower moving body 227. Furthermore, guided portions 227c are provided on both side portions of the lower moving body 227. The guided portions 227c are a pair of protrusions protruding laterally. The guided portions 227c are held by the guide portion 206 of the installation body main body 201, and are configured to be able to guide the lower moving body 227 to linearly move back and forth while maintaining its horizontal posture. Since the lower moving body 227 is supported at two locations (or three points) by the guide portion 206 and the lower operating shaft 225, the tilting (rotation about the screw shaft or inclination forward and backward) of the lower moving body 227 is restricted, and its pressable posture is maintained. That is, the lower moving body 227 is restricted from rotating together with the rotation of the lower operating shaft 225. Further, a pin-shaped engagement convex portion 227d that is inserted into the notch portion 221a of the lower clamping body 221 is formed on the front surface of the lower moving body 227. The engagement convex portion 227d engages with the lower clamping body 221 in a state of being inserted into the notch portion 221a, restricts the lower clamping body 221 from rotating about the screw shaft, and functions to guide the vertical movement of the lower clamping body 221.

[0084] That is, in the lower clamping mechanism, the lower operating shaft 225 held in the installation body main body 201 through the through hole 205 penetrates the lower clamping body 221, and the lower operating shaft 225 is screwed to the lower moving body 227 supported by the guide portion 206, whereby each component of the lower clamping mechanism is operably assembled to the installation body main body 201. Since the lower moving body 227 is supported by the guide portion 206 in a state where movement and tilting other than in the front-rear direction are restricted, the lower operating shaft 225 screwed to the lower moving body 227 is also held by the installation body main body 201 in a state where tilting is restricted in the same manner. Further, when the lower moving body 227 is screwed to the tip of the lower operating shaft 225, the lower clamping body 221 is movable in the axial direction and the vertical direction of the lower operating shaft 225. The lower clamping body 221 is movable between an upper non-interference position where it can pass through the wall hole 12 without interfering with the wall 11 by the relative movement of the screw shaft in the long hole 223 and a lower clamping position where it can clamp the lower edge of the peripheral edge of the wall hole 12 together with the installation body main body 201. And it can be displaced from the non-interference position to the clamping position by the free fall of the lower clamping body 221.

[0085] When fixing the wiring device installation body 200 to the wall 11, it is preferable that both the lower clamping body 221 and the lower moving body 227 are located on the tip side of the lower operating shaft 225. In this way, when the lower clamping body 221 is located on the rear end side, the supported portion 224 is supported by the support portion 202e, so that it is held at an upper non-interference position where it can pass through the wall hole 12 without interfering with the wall 11. Thereby, the user can insert the peripheral wall 202 of the wiring device installation body 200 into the wall hole 12 without interfering with the wall 11 in order to arrange the upper clamping body 211 and the lower clamping body 221 behind the wall without holding the lower clamping body 221 by hand. After arranging the upper clamping body 211 and the lower clamping body 221 behind the wall, when the user performs a screwing operation on the screw head of the lower operating shaft 225 from the wall front side, as shown in FIG. 30, the lower moving body 227 advances while pressing the upper clamping body 211. Then, the support of the supported portion 224 by the support portion 202e is released, and the lower clamping body 221 freely falls and displaces from the non-interference position to the clamping position. Thereby, the upper clamping body 211 and the lower clamping body 221 are arranged at the clamping position on the back side of the wall, and by subsequently performing a screwing operation on the upper operating shaft 215 and the lower operating shaft 225, the wiring device installation body 200 can be fixed to the wall 11 in the same manner as in the first embodiment.

[0086] [Third Embodiment] A wiring device installation body 300 according to another embodiment (third embodiment) of the present invention will be described. FIGS. 31(a) and (b) are schematic perspective views of the wiring device installation body 300 as seen from the front and rear, respectively, showing a form in which the upper clamping body 311 and the lower clamping body 231 are in a non-interfering position. FIGS. 32(a) and (b) are front and rear views of the wiring device installation body 300 of FIG. 31. FIGS. 33(a) to (c) are a plan view, a side view, and a bottom view of the wiring device installation body 300 of FIG. 31. FIG. 34 is an exploded perspective view of the wiring device installation body 300 as seen from the front. FIG. 35 is a schematic perspective view of the wiring device installation body 300 as seen from the rear, showing a form in which the lower clamping body 321 is in a clamping position. FIGS. 36 to 40 are cross-sectional views of each part of the wiring device installation body 300. Here, the front side of the wiring device installation body 300 is defined as the front (or the wall surface side), and the opposite side is defined as the rear (or the wall back side). Also, the vertical direction in FIG. 32(a) is defined as the vertical direction or the vertical width, and the horizontal direction is defined as the horizontal direction or the horizontal width.

[0087] As shown in FIGS. 31 to 34, the wiring device installation body 300 of the present embodiment includes an installation body main body 301, an upper clamping body 311, an upper operation shaft 315, a lower clamping body 321, a lower operation shaft 325, and a lower moving body 327, and these members are assembled into one body. The wiring device installation body 300 includes a clamping mechanism for fixing the installation body main body 301 inserted into the wall hole 12 to the wall 11 by clamping the periphery of the wall hole 12. The clamping mechanism is composed of an upper clamping mechanism for clamping the upper part of the periphery of the wall hole 12 and a lower clamping mechanism for clamping the lower part of the periphery of the wall hole 12. Here, the clamping part 307, the upper clamping body 311, and the upper operation shaft 315 constitute the upper clamping mechanism, and the clamping part 307, the lower clamping body 321, the lower operation shaft 325, and the lower moving body 327 constitute the lower clamping mechanism. Each component will be described below.

[0088] The installation body main body 301 is configured as a bottomless cylindrical body or a housing attached from the wall surface side to the periphery of the wall hole 12. The installation body main body 301 includes a peripheral wall 302 that defines an internal space inward, and an opening 303 that is formed on the front side of the peripheral wall 302 and faces the external side of the internal space. The peripheral wall 302 includes a bottom wall 302a that forms the rear surface and faces the opening 303, and side walls 302b that stand upright from the bottom wall 302a. Although not shown, a cable inlet may be formed at any location on the bottom wall 302a or the left and right side walls 302b. Further, an upper opening 308 that allows the front and rear movement of the upper clamping body 311 is formed on the upper surface of the side wall 302b, and a lower opening 309 through which the lower moving body 327 passes is formed on the lower surface of the side wall 302b. Also, similar to the first and second embodiments, the installation body main body 301 includes a fixture frame attachment portion 304 to which a fixture frame 15 for holding the wiring fixture 16 is attached, a pair of through holes 305 configured to allow the upper operation shaft 315 and the lower operation shaft 325 inserted from the front side to be idly inserted, and a clamping portion 307 that abuts against the periphery of the wall hole 12 from the wall surface side. The description of these components is omitted.

[0089] Also, a guiding portion 306 for guiding the front and rear movement of the lower clamping body 321 and the lower moving body 327 is provided on the lower surface of the side wall 302b of the installation body main body 301. The guiding portion 306 is provided so as to protrude from the lower surface of the side wall 302b that faces in the lateral direction, and is a pair of L-shaped ridges that extend parallel to each other in the front and rear directions. The guiding portion 306 is configured to dispose a pair of convex engaged portions 321a of the lower clamping body 321 and a pair of guided portions 327c of the lower moving body 327 therebetween.

[0090] Furthermore, the installation body main body 301 is configured to dispose the lower clamping body 321 on the outer surface side of the bottom wall 302a (which is outside the internal space) at a non-interfering position. And, on the bottom wall 301a and the side wall 302b of the installation body main body 301, recessed portions 302e are recessed inward from the outer edge of the lower clamping body 321 at the non-interfering position, and are provided to enable fingers to be placed for supporting the lower clamping body 321 from the outside of the peripheral wall 302. In the present embodiment, the recessed portions 302e are provided on both of the left and right side walls 302b, but in addition to this, or instead of this, they may be provided on the bottom wall 301a. The recessed portions 302e have a width that allows fingers to be inserted, and function to assist the user in inserting fingers into the recessed portions 302e from the outside to operate the lower clamping body 321.

[0091] Next, an upper clamping mechanism for clamping the upper part of the peripheral edge of the wall hole 12 together with the installation body main body 301 will be described. The upper clamping mechanism has the same configuration as that of the second embodiment, is disposed on the back side of the wall through the wall hole 12, and includes an upper clamping body 311 that abuts against the peripheral edge portion of the wall hole 12 from the back side of the wall, and an upper operation shaft 315 for driving the upper clamping body 311 by a rotation operation from the front side of the wall.

[0092] That is, in the upper clamping mechanism, the upper operating shaft 315 held in the installation body main body 301 through the through hole 305 penetrates the upper clamping body 311, and the upper operating shaft 315 is screwed into the screw hole 313 of the upper clamping body 311, whereby each component of the upper clamping mechanism is operably assembled to the installation body main body 301. The upper operating shaft 315 screwed to the upper clamping body 311 is held by the installation body main body 301 in a state where its tilting is restricted. When fixing the wiring device installation body 300 to the wall 11, it is preferable that the upper clamping body 311 is located on the tip side of the upper operating shaft 315. Then, by the user performing a screwing operation on the screw head of the upper operating shaft 315 from the wall front side, it is possible to screw the upper clamping body 311 forward along the screw axis. Specifically, following the screwing of the upper operating shaft 315 in one direction, the upper operating shaft 315 idles relative to the installation body main body 301 in a state where the tilting of the screw axis is restricted, and the screw axis screws into the screw hole 313 of the upper clamping body 311, whereby the upper clamping body 311 advances toward the wall 11.

[0093] Next, a lower clamping mechanism for clamping the lower periphery of the wall hole 12 together with the installation body main body 301 will be described. The lower clamping mechanism is disposed on the back side of the wall through the wall hole 12, and includes a lower clamping body 321 that abuts against the lower periphery of the wall hole 12 from the back side of the wall, a lower operating shaft 325 for operating the lower clamping body 321 by a rotation operation from the front side of the wall, and a lower moving body 327 that moves so as to press the lower clamping body 321 from the rear according to the screwing operation of the lower operating shaft 325.

[0094] The lower clamping body 321 is configured to clamp the wall 11 together with the clamping portion 307. As shown in FIG. 34, the lower clamping body 321 is formed as a rectangular plate capable of pressing the back surface of the wall 11. The lower clamping body 321 has a lower clamping portion 322 that abuts against the lower part of the periphery of the wall hole 12 from the back side of the wall at its lower part. A long hole 323 is formed in the lower clamping body 321 through which the screw shaft of the lower operation shaft 325 is inserted in an idle state. The long hole 323 extends in the vertical direction and has an open end that is open upward and a closed end that is closed at the lower side. This long hole 323 is configured to loosely insert the screw shaft of the lower operation shaft 325 and allow free relative movement in the vertical direction of the screw shaft (i.e., the self-weight fall of the lower clamping body 321). And in this embodiment, when the lower clamping body 321 freely falls and moves to the clamping position, the screw shaft comes out of the open end of the long hole 323 and operates to be locked by the guide portion 306 (locking portion). That is, in this embodiment, the lower end surface of the long hole 323 and the upper surface of the guide portion 306 respectively define the upper and lower movement end positions of the lower clamping body 321.

[0095] Further, at the upper end of the lower clamping body 321, locked portions 321a are formed as a pair of convex pieces protruding on both sides. The pair of locked portions 321a are configured to be supported by the pair of guide portions 306 of the installation body main body 301 when the lower clamping body 321 is displaced to the clamping position. In other words, the guide portion 306 is configured as a locking portion to lock the locked portions 321a of the lower clamping body 321 that freely falls and suspend the lower clamping body 321.

[0096] And as shown in FIGS. 38 and 39, the lower clamping body 321 is vertically movable between a non-interference position where the lower clamping portion 322 (formed on its front surface) is relatively upward with respect to the installation body main body 301 and a clamping position where the lower clamping portion 322 is relatively downward with respect to the installation body main body 301. In this embodiment, the lower clamping body 321 is allowed to move between the non-interference position and the clamping position only when it is located on the tip side of the lower operation shaft 325 (the rear side of the installation body main body 301). In particular, a space for allowing the upward movement of the lower clamping body 321 is recessed on the outer surface of the rear side (bottom wall 302a) of the lower part of the peripheral wall 302. The lower clamping body 321 is arranged so as not to protrude from the outer surface of the side wall of the installation body main body 301 in the non-interference position, and is arranged to protrude below the installation body main body 301 in the clamping position. Also, in this embodiment, the lower clamping body 321 is configured to be arranged outside the peripheral wall 302 in both the non-interference position and the clamping position. In particular, the lower clamping body 321 is attached to the outer surface of the bottom wall 302a in the non-interference position, and is configured to move back and forth by being suspended from the lower surface of the side wall 302b in the clamping position shown in FIG. 35.

[0097] Further, a supported portion 324 supported by the user's finger is defined on the lower clamping body 321 via the recess 302e of the peripheral wall 302. That is, the supported portion 324 is a portion that is exposed to the outside via the recess 302e when the lower clamping body 321 is in the non-interference position and can be supported and operated by the user's finger. In this embodiment, the supported portion 324 is at the left and right side edges, and the lower clamping body 321 can be operated from the outer surface sides of the left and right side walls 302b.

[0098] The lower operating shaft 325 includes a screw head that is rotationally operated from the wall surface side and a screw shaft extending from the screw head. That is, the lower operating shaft 325 can be composed of a general screw material. As shown in FIGS. 36, 38, and 40, the screw head of the lower operating shaft 325 is accommodated and held in the lower through hole 305 of the installation body main body 301, and the screw shaft is arranged to penetrate the lower clamping body 321. Further, in this lower clamping mechanism, the lower operating shaft 325 is attached or held to the installation body main body 301 while being rotatable relative to the lower clamping body 321 (elongated hole 323) and the installation body main body 301 (through hole 305), and the tilting of the screw shaft is restricted. The screw shaft of the lower operating shaft 325 extends from the front surface to the rear surface of the peripheral wall 302, and its tip has a length that penetrates the wall hole 12 from the front surface side and protrudes to the back side of the wall. In other words, the length of the screw shaft is greater than the thickness of the wall 11. Then, the lower operating shaft 325 penetrates the through hole 305 of the installation body main body 301 from the front surface side and penetrates the elongated hole 323 of the lower clamping body 321, thereby connecting the lower clamping body 321 to be slidable back and forth relative to the installation body main body 301. Further, the screw shaft of the lower operating shaft 325 is screwed into the lower moving body 327 on the tip side of the lower clamping body 321. In this embodiment, since the lower operating shaft 325 is arranged in the internal space of the peripheral wall 302, the lower moving body 327 is supported so as to span both the inside and outside of the peripheral wall 302 through the lower opening 309. The present invention is not limited to this, and the lower operating shaft 325 may be arranged outside the peripheral wall 302, and the lower opening 309 may also be omitted.

[0099] Also, as shown in FIGS. 38 and 39, the screw shaft of the lower operating shaft 325 is inserted into the long hole 323 so as to be freely relatively movable in the vertical direction. Then, due to the self-weight fall of the lower clamping body 321, the screw shaft can move from the lower end to the upper end side of the long hole 323 while being inserted into the long hole 323. And, at the clamping position, the lower clamping body 321 has the screw shaft detached from the upper end side of the long hole 323 and is suspended by the guide portion 306 via the locked portion 321a (see FIG. 39(b)). And, when the lower clamping body 321 is lifted from below by the user, the screw shaft relatively moves to the lower end thereof via the open end of the long hole 323 and can move to an upper position (non-interference position) so as to approach the upper clamping body 311 (see FIG. 39(a)).

[0100] The lower moving body 327 is screwed to the lower operating shaft 325 behind the lower clamping body 321 and is configured to screw in toward the wall 11 in accordance with the rotation of the screw shaft in one direction and press the lower clamping body 321 from behind. The lower moving body 327 is formed of a rectangular plate piece smaller than the lower clamping body 321 as shown in FIG. 34. The lower moving body 327 has a screw hole-shaped screwing portion 327a that screws into the screw shaft of the lower operating shaft 325. Also, a pressing portion 327b for pressing the rear surface of the lower clamping body 321 is formed on the front surface of the lower moving body 327. Further, guided portions 327c are provided on both side portions of the lower moving body 327. The guided portions 327c are a pair of protrusions protruding laterally. The guided portions 327c are held by the guide portion 306 of the installation body main body 301 and are configured to be able to guide the lower moving body 327 to linearly move back and forth while maintaining its posture horizontally. Since the lower moving body 327 is supported at two locations (three points) of the guide portion 306 and the lower operating shaft 325, the tilting (rotation about the screw shaft or inclination back and forth) of the lower moving body 327 is restricted and its pressable posture is maintained. That is, the lower moving body 327 is restricted from rotating together in accordance with the rotation of the lower operating shaft 325.

[0101] That is, in the lower clamping mechanism, the lower operating shaft 325 held in the installation body main body 301 via the through hole 305 is screwed to the lower moving body 327 supported by the guide portion 306, and the lower clamping body 321 is held at a position where it can be operated by the lower moving body 327. As a result, each component of the lower clamping mechanism is operably assembled to the installation body main body 301. Since the lower moving body 327 is supported by the guide portion 306 in a state where movement and tilting other than in the front-rear direction are restricted, the lower operating shaft 325 screwed to the lower moving body 327 is also held by the installation body main body 301 in a state where tilting is restricted. Further, when the lower moving body 327 is screwed to the tip of the lower operating shaft 325, the lower clamping body 321 is movable in the axial direction and the vertical direction of the lower operating shaft 325. The lower clamping body 321 can move between an upper non-interference position where it can pass through the wall hole 12 without interfering with the wall 11 and a lower clamping position where it can clamp the lower peripheral edge of the wall hole 12 together with the installation body main body 301 by the relative movement of the screw shaft in the long hole 323. And it can be displaced from the non-interference position to the clamping position by the free fall of the lower clamping body 321.

[0102] When fixing the wiring device installation body 300 to the wall 11, it is preferable that both the lower clamping body 321 and the lower moving body 327 are located on the tip side of the lower operating shaft 325. When the lower clamping body 321 is located on the rear end side, the user can insert a finger through the recess 302e and easily support the lower clamping body 321 at the upper non-interference position. Thereby, the user can support the lower clamping body 321 by hand and insert the peripheral wall 302 of the wiring device installation body 300 into the wall hole 12 without interfering with the wall 11 so that the upper clamping body 311 and the lower clamping body 321 are arranged behind the wall. Then, when the user releases the hand from the supported portion 324 of the lower clamping body 321 and further inserts while releasing the support of the supported portion 324, the lower clamping body 321 that has passed through the wall hole 12 freely falls and is displaced from the non-interference position to the clamping position. Thereby, the upper clamping body 311 and the lower clamping body 321 are arranged at the clamping positions on the back side of the wall, and by the screwing operation of the upper operating shaft 315 and the lower operating shaft 325 subsequently, the wiring device installation body 300 can be fixed to the wall 11 in the same manner as in the first embodiment.

[0103] The present invention is not limited to the above-described embodiment, and various modifications are possible. Modifications of the present invention will be described below.

[0104] (1) The wiring apparatus installation device of the present invention is not limited to the above-described embodiment. In the above-described embodiment, the clamping mechanism is composed of two clamping mechanisms, an upper clamping mechanism and a lower clamping mechanism. However, the present invention is not limited to this. For example, the upper clamping mechanism may be omitted, and the clamping mechanism may be composed of only the lower clamping mechanism. In this case, the lower clamping portion of the lower clamping body may be expanded so as to abut on other parts of the periphery in addition to the lower part of the periphery of the wall hole. Alternatively, the upper clamping mechanism may take various forms. For example, in the upper clamping mechanism, the upper clamping body may be configured to be pressed by the upper moving body, similar to the lower clamping mechanism.

[0105] (2) The wiring apparatus installation body of the present invention is not limited to the above-described embodiments. In the above-described first and second embodiments, the inner surfaces of the upper and lower ends of the elongated hole in the lower clamping mechanism lock the lower operating shaft, thereby determining the movement end point position that defines the relative movement range of the lower clamping body between the non-interference position and the clamping position. However, the present invention is not limited to this. The movement end point limiting the movement range of the lower clamping body may be determined by a locking portion separately provided on the installation body main body and / or the lower movable body. For example, the configuration of the elongated hole and locking portion of the third embodiment may be combined with the configuration of the first and second embodiments. Also, the lower operating shaft may be configured to be locked by the locking portion midway through the elongated hole.

[0106] (3) The wiring apparatus installation body of the present invention is not limited to the above-described embodiment. In the above-described embodiment, the clamping portion of the installation body is configured to abut against a portion of the periphery of the wall hole from the front side of the wall. However, the present invention is not limited to this. For example, the clamping portion may be configured to abut against the entire periphery of the wall hole.

[0107] (4) The wiring device installation body of the present invention is not limited to the above embodiment. In the above embodiment, when the lower clamping body moves from the non-interference position to the clamping position, it is configured to slide linearly downward while maintaining its posture. However, the present invention is not limited to this. That is, the lower clamping body may move from the non-interference position to the clamping position by its own weight (i.e., by free fall) while displacing its posture (for example, while rotating in a state of being pivotally supported by the installation tool main body).

[0108] (5) The wiring device installation body of the present invention is not limited to the above embodiment and can take various forms. For example, the lower clamping body may be changed to a horseshoe shape located outside the peripheral wall (especially the side wall) so that it does not enter the internal space even in the non-interference position.

[0109] (6) The wiring device installation body of the present invention is not limited to the above embodiment and can take various forms. For example, it may have a plurality of pairs of fixture frame attachment parts so that a plurality of fixture frames can be fixed in parallel. Further, a plurality of lower clamping bodies may be arranged in the arrangement direction of the fixture frames.

[0110] (7) The wiring device installation body of the present invention is not limited to the above embodiment and can take various forms. For example, although an example in which the arrangement direction of a pair of fixture frame attachment parts is in the vertical direction is shown, a lower clamping mechanism may be provided for a wiring device fixing body installed such that the arrangement direction of a pair of fixture frame attachment parts is in the horizontal direction. In that case, the lower clamping body is displaced between the clamping position and the non-interference position by a moving direction orthogonal to the arrangement direction of the pair of fixture frame attachment parts. Also, at this time, a plurality of lower clamping bodies may be arranged in the arrangement direction of the pair of fixture frame attachment parts.

[0111] (8) The wiring device installation body of the present invention is not limited to the above embodiment and can take various forms. The lower moving body may be configured to project outward as it screws and rotates, like the upper clamping body of the first embodiment. By doing so, the pressing portion of the lower clamping body can be further expanded downward. That is, the lower moving body is not limited to moving toward and away from the wall while maintaining its posture.

[0112] (9) The wiring apparatus installation device of the present invention is not limited to the above embodiment and may take various forms. In the first embodiment, the supported portion is configured so that a finger can be placed through the opening in both the non-interference position and the clamping position. However, the supported portion may be configured so that a finger cannot be placed through the opening in the clamping position. As long as the supported portion can be placed so that a finger can be placed through the opening at least in the non-interference position, operability can be sufficiently improved.

[0113] (10) The wiring device installation unit of the present invention is not limited to the above-described embodiment and may take various forms. In the third embodiment, the peripheral wall may be configured to consist only of side walls that surround and form the opening, without a bottom wall facing the opening. Even in this case where the bottom wall is omitted, the lower clamping body in the non-interfering position is similarly positioned so as not to protrude from the outer surface of the side wall.

[0114] (11) The wiring apparatus installation body of the present invention is not limited to the above-described embodiment. In the above-described embodiment, the shape of the wiring apparatus installation body is determined based on a rectangular wall hole, but the present invention is not limited thereto. For example, the wall hole formed in the wall may be circular, oval, elliptical, polygonal, or any other irregular shape. The design of the wiring apparatus installation body can be appropriately modified by a person skilled in the art based on the technical concept of the present invention and in accordance with the shape of the wall hole.

[0115] The present invention is not limited to the above-described embodiments and modifications, and can be implemented in various forms within the technical scope of the present invention. [Explanation of symbols]

[0116] 10 Equipment installation structure 11 Wall 12 wall hole 15 Instrument frame 16 Wiring devices 17 Screwdriver (Tool) 100,200,300 Wiring equipment installation 101, 201, 301 Installation body 102,202,302 Peripheral wall 202a, 302a bottom wall 202b,302b sidewall 102c, 202c, 302c shaft support 202e Support Department 302e recess 103,203,303 opening 104,204,304 Utensil holding parts 105,205,305 through holes Internal Cases 106, 206, and 306 107,207,307 Hostage Department 108,208,308 Upper opening 109,209,309 Lower opening 111,211,311 Upper clamping body 112,212,312 Upper clamping part 113,213,313 holes 115,215,315 Upper operating shaft (upper operating part) 121,221,321 Lower clamping body 121a,221a Cut out the parts 321a Quilted stop 122,222,322 Lower clamping part 123,223,323 Long hole 124,224,324 Supported Department 125,225,325 Lower operating shaft (lower operating part) 127,227,327 Lower moving body 127a, 227a, 327a screw-on portion 127b,227b,327b pressure department 127c, 227c, 327c were internal cases 227d fastening convex part

Claims

1. A wiring device installation body for installing a wiring device with respect to a wall hole formed in a wall, comprising: An installation body main body having a peripheral wall defining an internal space, an opening exposing the internal space to the outside, and a fixture frame attachment portion to which a fixture frame for holding the wiring device is attached; A clamping mechanism for fixing the installation body main body inserted into the wall hole to the wall by clamping the periphery of the wall hole; The clamping mechanism includes: A clamping portion provided on the installation body main body and contacting the periphery of the wall hole from the wall surface side; A lower clamping body disposed on the back side of the wall through the wall hole and contacting at least the lower part of the periphery of the wall hole from the back side of the wall; A lower operating portion for operating the lower clamping body, which includes a screw shaft rotatably operated from the wall surface side and is rotatably held by the installation body main body in a state where the tilting of the screw shaft with respect to the installation body main body is restricted; A lower moving body screwed to the screw shaft behind the lower clamping body and advancing toward the wall according to the rotation of the screw shaft in one direction to press the lower clamping body from behind; The lower clamping body is relatively movable with respect to the installation body main body from a non-interference position where it can pass through the wall hole without interfering with the wall to a clamping position where it faces the wall and clamps the wall, and the movement from the non-interference position to the clamping position is a free fall of the lower clamping body. A wiring device installation body characterized by this.

2. The wiring device installation body according to claim 1, wherein at least a part of the lower clamping body in the non-interference position is disposed within the internal space.

3. The lower clamping body has a supported portion supported by inserting a finger into the internal space to maintain the non-interference position, The wiring device installation body according to claim 2, wherein the supported portion can be hooked with a finger within the internal space in both the non-interference position and the clamping position.

4. The lower clamping body has a supported portion supported by the installation body main body in the non-interference position, The wiring device installation body according to claim 1, wherein when the lower clamping body advances toward the wall by the rotation operation of the screw shaft, the support of the supported portion is released, and the lower clamping body is configured to freely fall from the non-interference position to the clamping position.

5. The peripheral wall includes a bottom wall facing the opening and side walls erected from the bottom wall. The lower clamping body is arranged on the outer surface side of the bottom wall at the non-interference position and is configured to be supported at the non-interference position by a finger from the outside of the peripheral wall. The wiring device installation body according to claim 1, characterized in that.

6. In the bottom wall and / or the side wall, a recess is provided that is recessed inside the outer edge of the lower clamping body at the non-interference position, and that allows a finger to be placed to support the lower clamping body from the outside of the peripheral wall. The wiring device installation body according to claim 5, characterized in that.

7. The installation body main body and the lower moving body cooperate to restrict the tilting of the screw shaft. The wiring device installation body according to any one of claims 1 to 6, characterized in that.

8. When the lower moving body clamps the wall with the installation body main body and the lower clamping body, the lower moving body presses at least the portion below the screw shaft of the lower clamping body from the rear. The wiring device installation body according to any one of claims 1 to 6, characterized in that.

9. The clamping mechanism is an upper clamping body that abuts against the upper part of the peripheral edge of the wall hole from the back side of the wall, which is located above the lower part of the peripheral edge of the wall hole, and further includes an upper operation part for operating the upper clamping body, which is provided with a screw shaft that is rotated from the front side of the wall surface, and is rotatably held by the installation main body in a state where the tilting of the screw shaft with respect to the installation body main body is restricted. The upper clamping body is operated by the upper operation part so as to move toward the wall without moving up and down with respect to the installation body main body. The wiring device installation body according to any one of claims 1 to 6, characterized in that.

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