Wiring device fixing body

Abstract

To provide a wiring device fixing body which makes it possible to improve the work of installing a wiring device on a wall.SOLUTION: A wiring device fixing body includes: a fixing body main body; an upper clamping body constructed to nip a wall together with the fixing body main body; a lower nipping body structured to nip a wall together with the fixing body main body; a lower operating shaft that is idle-rotatable with respect to the lower nipping body and the fixing body main body, and is held by the fixing body main body in a state in which tilting of a screw shaft is restricted; and a lower side mobile object that is screwed to the lower operating shaft behind the lower nipping body, and structured to press the lower nipping body from behind. The lower nipping body is provided with a long hole into which the lower operation shaft is inserted so as to be freely movable relative to the lower operation shaft in the vertical direction. The lower nipping body is movable between a non-interference position in which the lower nipping body can pass through the wall hole without interfering with the wall and a nipping position in which the lower peripheral portion of the wall hole can be nipped together with the fixing body main body, and is displaceable from the non-interference position to the nipping position by free fall of the lower nipping body.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a wiring device fixing body for fixing a wiring device to a wall.

Background Art

[0002] Conventionally, when installing wiring devices such as switches and outlets at predetermined positions on the wall surface of a structure, wall holes are formed in the wall, and the wiring devices are attached through the wall holes. Generally, the wiring devices are connected to wiring cables behind the wall and installed so as to be exposed toward the wall surface. And, various wiring device fixing bodies are used to fix the wiring devices to the wall through the wall holes.

[0003] Patent Document 1 discloses a wiring device mounting frame (wiring device fixing body) used for mounting wiring devices such as switches and outlets to wall holes. Hereinafter, in this paragraph, the reference numerals of Patent Document 1 are shown in parentheses. The wiring device 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 formed in a substantially square plate shape as a whole, by 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 device 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). The 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 elongated holes (2e) formed in the mounting frame body (2) into the screw hole (3c) of the mounting bracket (3). Further, the corner hole (2b) of the wiring device mounting frame (1) is formed at a height where the mounting bracket (3) can move up and down by a predetermined distance. To attach the wiring device 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 pair of upper and lower 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 the mounting bracket (3) is inserted 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 elongated hole (2e) of the mounting frame body (2) to slide the mounting bracket (3) in the vertical separation direction, and the contact portion (3b) 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 device 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 fixing 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 direction of the mounting frame body. 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 so that the wall is sandwiched 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 are not visible from the wall front side and screw the screw while maintaining the clamping positions. Further, in the said wiring fixture mounting frame, since the screw penetrates 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, the user also needs to operate to maintain the posture of the screw perpendicular to the wall surface. Therefore, it is cited as a problem that the conventional wiring fixture mounting frame involves difficulty in the operation of fixing the wiring fixture to the wall material through the wall hole. Furthermore, in the operation, since the inclination of the posture of the screw and the displacement of the mounting bracket are likely to occur, it is also cited as 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 fixing body capable of improving the operation of installing a wiring fixture on a wall.

Means for Solving the Problems

[0007] The wiring fixture fixing body according to claim 1 is a wiring fixture fixing body for fixing a wiring fixture to a wall hole formed in a wall, comprising a fixture attachment portion for attaching the wiring fixture, a fixing body main body attached from the wall surface side to the periphery of the wall hole, and an upper clamping body disposed on the back side of the wall through the wall hole, having an upper clamping portion that abuts from the back side of the wall on the upper part of the periphery of the wall hole, and configured to clamp the wall together with the fixing body main body; a lower clamping body disposed on the back side of the wall through the wall hole, having a lower clamping portion that abuts from the back side of the wall on the lower part of the periphery of the wall hole, and configured to move proximally toward the wall by an operation from the wall surface side and clamp the wall together with the fixing body main body; a lower operation shaft for operating the lower clamping body, comprising a screw head portion rotatably operated from the wall surface side and a screw shaft extending from the screw head portion, the screw shaft being disposed so as to penetrate the lower clamping body, being rotatable freely with respect to the lower clamping body and the fixing body main body, and being held by the fixing body main body in a state where tilting of the screw shaft is restricted; a lower moving body screwed to the lower operation shaft behind the lower clamping body, configured to screw forward toward the wall according to rotation of the screw shaft in one direction and press the lower clamping body from behind; and the lower clamping body is provided with a long hole into which the screw shaft of the lower operation shaft is inserted so as to be freely relatively movable in the vertical direction, the lower clamping body is movable between a non-interference position where it can pass through the wall hole without interfering with the wall by relative movement of the screw shaft in the long hole and a clamping position where it can clamp the lower part of the periphery of the wall hole together with the fixing body main body, and is displaceable from the non-interference position to the clamping position by free fall of the lower clamping body. This is the gist of the invention.

[0008] The wiring fixture fixing body according to claim 2 is the wiring fixture fixing body according to claim 1, wherein the upper clamping body always maintains a posture capable of clamping the wall together with the fixing body main body. This is the gist of the invention.

[0009] The wiring fixture fixing body according to claim 3 is the wiring fixture fixing body according to claim 1 or 2, characterized in that the lower moving body has a pressing portion that presses a portion below the screw shaft in the lower clamping body when the lower clamping body is in the clamping position.

[0010] The wiring fixture fixing body according to claim 4 is the wiring fixture fixing body according to claim 1 or 2, characterized in that the lower clamping body is provided with an engaging portion that engages with a tool inserted from the front of the fixing body main body for moving the lower clamping body from the clamping position to the non-interference position in a wall surface side movement operation.

[0011] The wiring fixture fixing body according to claim 5 is the wiring fixture fixing body according to claim 1 or 2, characterized in that a tool insertion port for inserting a tool is formed in the fixing body main body at least in front of the lower clamping body in the clamping position, and by inserting the tool from the front of the fixing body main body into the tool insertion port and pressing the lower clamping body, it is possible to forcibly retract the lower clamping body.

Advantages of the Invention

[0012] According to the wiring fixture fixing body described in claim 1, the lower clamping body is pressed from behind by a lower moving body that screws forward toward the wall by a screwing operation of a lower operating shaft having a screw shaft, so as to clamp the wall together with the fixing body main body. The screw shaft of the lower operating shaft is rotatable freely with respect to the lower clamping body and the fixing body main body, and is held by the fixing 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 shaft is held by the fixing body main body so as to rotate freely with respect to the lower clamping body and not tilt, it becomes easy for the user to perform the screwing operation while stably maintaining at least the posture of the lower clamping body. Further, by the screw shaft moving vertically relative to each other within the long hole provided in the lower clamping body, the lower clamping body is movable to a non-interference position where it can pass through the wall hole without interfering with the wall, and a clamping position where it can clamp the lower peripheral edge of the wall hole together with the fixing body main body. Moreover, the lower clamping body is displaceable from the non-interference position to the clamping position by free fall. That is, when the user inserts the lower clamping body through the wall hole into the back of the wall while maintaining the lower clamping body at the non-interference position, the lower clamping body falls by its own weight, and the lower clamping body that has passed through the wall hole can be arranged at the clamping position. Then, the user can easily fix the wiring fixture fixing body to the wall by performing a screwing operation on the lower operating shaft without holding the lower clamping body. Furthermore, since it becomes easy to align the upper clamping body and the lower clamping body, it becomes possible to arrange the upper clamping body and the lower clamping body evenly with respect to the peripheral edge of the wall hole. Thereby, the wiring fixture fixing body can be firmly fixed to the wall, and stable fixing of the wiring fixture to the wall is also possible. Therefore, the wiring fixture fixing body of the present invention improves the installation work of the wiring fixture on the wall.

[0013] According to the wiring fixture fixing body described in claim 2, in addition to the effects of the invention of claim 1, since the upper clamping body always maintains the clamping posture, the user can sandwich the wall between the upper clamping body in the clamping posture and the fixing body main body. That is, the user can insert the lower clamping body through the wall hole into the wall back 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 fall freely, and it is possible to arrange the upper clamping body and the lower clamping body at the clamping position. Thereby, the workability and the installation stability are further improved.

[0014] According to the wiring fixture fixing body described in claim 3, in addition to the effects of the invention of claim 1 or 2, the lower clamping body is pressed by a pressing portion that extends downward from the position where the screw shaft of the lower moving body passes. That is, since the pressing portion of the lower moving body presses the lower clamping body from the rear at or above the lower peripheral edge of the wall hole (or at a position closer to the lower peripheral edge on the wall hole), it is possible to exert a stronger clamping force.

[0015] According to the wiring fixture fixing body described in claim 4, in addition to the effects of the invention of claim 1 or 2, the user can perform a moving operation on the lower clamping body from the wall surface side from the clamping position to the non-interference position by inserting a tool from the front of the fixing body main body into the lower clamping body disposed on the wall back and engaging with the engaging portion. That is, if necessary, it becomes easy to move the wiring fixture fixing body from the wall back to the wall surface through the wall hole.

[0016] According to the wiring fixture fixing body described in claim 5, in addition to the effects of the invention of claim 1 or 2, a insertion port for inserting a tool is disposed in front of the lower clamping body in the clamping position on the fixing body main body. For example, when the fixing body main body is attached to the peripheral edge of the wall hole, if the lower clamping body is at a position close to the fixing body main body and remains in the wall hole, by inserting a tool from the front of the fixing body main body into the insertion port and pressing the lower clamping body, it is possible to forcibly retract the lower clamping body, move it to the wall back, and guide it to the clamping position.

Brief Description of the Drawings

[0017]

Figure 1

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Figure 22

Embodiments for Carrying Out the Invention

[0018] 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 and the like do not necessarily match the actual dimensional ratios. That is, the present invention is not limited to the dimensional ratios in the drawings.

[0019] The wiring device fixing body 100 according to 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 holds the wiring device 15 exposed on the wall surface side, so as to install the wiring device 15 with respect to the wall hole 12. Further, in the present embodiment, the structure in which the wiring device 15 is installed with respect to the wall hole 12 of the wall 11 via the wiring device fixing body 100 is defined as the device installation structure 10. Note that, in the present embodiment, the wiring device 15 is exemplified as a device into which a power plug is inserted, but any device such as a device into which a communication terminal is inserted or a device provided with a switch mechanism can be selected. Since the wiring device 15 is a general device, the description of its internal structure and wiring is simplified or omitted.

[0020] First, the wiring device fixing body 100 of the present embodiment will be described. FIGS. 1(a) and (b) are schematic perspective views of the wiring device fixing body 100 as viewed from the front and the rear. FIGS. 2(a) and (b) are a front view and a rear view of the wiring device fixing body 100. FIGS. 3(a) to (c) are a plan view, a side view, and a bottom view of the wiring device fixing body 100. FIGS. 4 and 5 are exploded perspective views of the wiring device fixing body 100 as viewed from the front and the rear. FIGS. 6 to 11 are cross-sectional views of respective parts of the wiring device fixing body 100. Here, the front side of the wiring device fixing 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.

[0021] As shown in FIGS. 4 and 5, the wiring device fixing body 100 of the present embodiment includes a fixing body main body 101, an upper clamping body 111, an upper operating shaft 115, an upper moving body 117, a lower clamping body 121, a lower operating shaft 125, and a lower moving body 127, and these members are assembled into one body. Here, the upper clamping body 111, the upper operating shaft 115, and the upper moving body 117 constitute an upper clamping mechanism for clamping the upper peripheral edge of the wall hole 12, and the lower clamping body 121, the lower operating shaft 125, and the lower moving body 127 constitute a lower clamping mechanism for clamping the lower peripheral edge of the wall hole 12. Each component will be described below.

[0022] The fixing body main body 101 is configured as a rectangular plate-shaped frame body attached from the wall surface side to the periphery of the wall hole 12. The fixing body main body 101 includes a rectangular annular frame portion 102 extending so as to cover the periphery of the wall hole 12, and a rectangular opening 103 formed at the center of the frame portion 102 and into which the wiring device 15 is inserted. Here, in a front view of the fixing body main body 101, a virtual straight line extending vertically passing through the center of the lateral width of the frame portion 102 is taken as the vertical axis, and a virtual straight line extending horizontally passing through the center of the vertical width is taken as the horizontal axis. The front surface (or surface) of the frame portion 102 faces the wall surface side, and its rear surface (back surface) is configured to abut against the entire periphery of the wall hole 12. The opening 103 is configured such that its entirety communicates with the wall hole 12. Further, on the rear surface of the frame portion 102, a rectangular cylindrical wall is protruding and formed so as to be continuously provided at the periphery of the opening 103. A plurality of mounting holes for mounting the wiring device 15 are formed on the side surface facing the lateral direction of the cylindrical wall. That is, the fixing body main body 101 is provided with a device mounting portion 104 for mounting the wiring device 15 forward.

[0023] A pair of through holes 105 are formed in the frame portion 102 of the fixing body main body 101. The pair of through holes 105 are respectively formed above and below the periphery of the opening 103 and are arranged on the vertical axis. In other words, the pair of through holes 105 are arranged to face each other in the vertical direction with the opening 103 therebetween. The pair of through holes 105 are each configured to be able to insert the upper operation shaft 115 and the lower operation shaft 125 inserted from the front surface side in a free rotation state. Further, each through hole 105 has a shape that allows the screw shaft to penetrate from the front surface side and can hold the screw head in the hole so that the front surfaces are flush.

[0024] Further, on the rear surface of the frame portion 102 of the fixed body main body 101, guide portions 106 that are paired vertically are provided. The guide portions 106 are configured to slidably hold the upper moving body 117 and the lower moving body 127 back and forth, respectively, and guide the back-and-forth movement (proximity movement and separation movement with respect to the wall 11) of the upper clamping body 111 and the lower clamping body 121. The pair of upper and lower guide portions 106 respectively protrude rearward at the upper and lower portions of the periphery of the opening 103. Each guide portion 106 has a protruding length sufficient for its tip to protrude from the wall hole 12 toward the back of the wall when the rear surface of the frame portion 102 is applied to the surface of the wall 11. That is, the protruding length of each guide portion 106 is at least greater than the thickness of the wall 11. More specifically, each guide portion 106 is composed of a pair of rail bodies 106a erected vertically from the rear surface of the frame portion 102. Each rail body 106a has a longitudinally extending slide groove 106b that opens laterally, and the rear end of the slide groove 106b is closed by a closing portion 106c. Further, the pair of rail bodies 106a face each other laterally, and a through hole 105 is disposed at an intermediate position therebetween. That is, the pair of rail bodies 106a extend so as to sandwich the upper operation shaft 115 or the lower operation shaft 125 therebetween.

[0025] Furthermore, on the upper and lower portions of the frame portion 102 of the fixed body main body 101, insertion ports 107 for inserting a shaft-like tool such as a driver, for example, are provided, respectively. As will be described later (see FIG. 20), the insertion ports 107 are used to insert a tool from the front of the fixed body main body 101 and press the upper clamping body 111 or the lower clamping body 121 to force it to retract. Specifically, two insertion ports 107 are formed above the through hole 105 in the upper portion of the frame body 102. These two insertion ports 107 are positioned such that the inserted tool can press the upper clamping body 111 without interfering with the upper operation shaft 115 passing through the through hole 105. On the other hand, two insertion ports 107 are formed below the through hole 105 in the lower portion of the frame body 102. These two insertion ports 107 are positioned such that the inserted tool can press the lower clamping body 121 without interfering with the lower operation shaft 125 passing through the through hole 105.

[0026] Further, a insertion hole 108 for inserting an elongated plate-like tool such as a ruler is provided at the lower part of the frame part 102 of the fixed body main body 101. The insertion hole 108 is disposed at least in front of the lower clamping body 121 in the clamping position. As will be described later (see FIG. 22), the insertion hole 108 is used to insert a tool from the front of the fixed body main body 101 and move the lower clamping body 121 from the clamping position (lower position) to the non-interference position (upper position) from the wall surface side. Specifically, a pair of left and right insertion holes 108 are formed near both lateral ends of the lower part of the frame body 102. Each insertion hole 108 is composed of an elongated slit extending in the vertical direction. This insertion hole 108 allows the inserted thin plate-like tool to be moved up and down within the insertion hole 108. Further, the pair of left and right insertion holes 108 are disposed at positions where a tool can be engaged with the pair of left and right engaging portions 124 of the lower clamping body 121 from the wall surface (front surface).

[0027] Next, an upper clamping mechanism for clamping the upper peripheral part of the wall hole 12 together with the fixed body main body 101 will be described. The upper clamping mechanism includes an upper clamping body 111 disposed on the back side of the wall through the wall hole 12 and configured to clamp the wall 11 together with the fixed body main body 101, an upper operation shaft 115 for driving the upper clamping body 111 by a rotation operation from the wall surface side, and an upper moving body 117 that moves so as to press the upper clamping body 111 from the rear in accordance with the screw rotation operation of the upper operation shaft 115.

[0028] As shown in FIGS. 4 and 5, 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 peripheral part of the wall hole 12 from the back side of the wall at its upper part. An insertion hole 113 through which the screw shaft of the upper operation shaft 115 is inserted in a free-running state is formed at the center of the lateral width of the lower part of the upper clamping body 111.

[0029] Further, at the lower edge of the upper clamping body 111, a pair of cutout portions 111a for penetrating and arranging a pair of rail bodies 106a are formed by cutting. A pair of rail bodies 106a are respectively arranged in the pair of cutout portions 111a (see FIG. 10). The pair of cutout portions 111a function as a guided portion for moving the upper clamping body 111 in the front-rear direction (direction perpendicular to the wall surface) on the pair of rail bodies 106a. Further, the cutout portion 111a also functions as a co-rotation restricting portion for restricting the co-rotation of the upper clamping body 111 with the upper operation shaft 115 by the engagement of its inner surface with the rail body 106a. And as shown in FIGS. 6 and 8, the upper clamping body 111 is arranged on the guide portion 106 (a pair of rail bodies 106a) of the fixed body main body 101 while maintaining the posture in which the upper clamping portion 112 (formed on its front surface) faces the back surface of the wall 11.

[0030] The upper operating shaft 115 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 upper operating shaft 115 can be composed of a general screw material. As shown in FIGS. 6, 8(a), and 11(a), the screw head of the upper operating shaft 115 is accommodated and held in the upper through hole 105 of the fixed body main body 101, and the screw shaft is arranged so as to penetrate the upper clamping body 111. Further, in this upper clamping mechanism, the upper operating shaft 115 is attached or held to the fixed body main body 101 while being able to rotate idly with respect to the upper clamping body 111 (insertion hole 113) and the fixed body main body 101 (through hole 105), and the tilting of the screw shaft is restricted. The screw shaft of the upper operating shaft 115 has a length such that its tip penetrates the wall hole 12 from the front 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, as shown in FIGS. 8(a) and 11(a), the upper operating shaft 115 penetrates the through hole 105 of the fixed body main body 101 from the front side and penetrates the insertion hole 113 of the upper clamping body 111 arranged on the guide portion 106, thereby connecting the upper clamping body 111 to the fixed body main body 101 so as to be slidable back and forth. Since the tip of the screw shaft of the upper operating shaft 115 extends behind the closing portion 106c of the slide groove 106b of the rail body 106a, the upper clamping body 111 and the upper moving body 117 are effectively prevented from detaching from the upper operating shaft 115.

[0031] The upper moving body 117 is screwed onto the upper operating shaft 115 behind the upper clamping body 111, 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 upper clamping body 111 from behind. As shown in FIGS. 4 and 5, the upper moving body 117 is composed of a plate piece smaller than the upper clamping body 111. The upper moving body 117 has a threaded engagement portion 117a in the shape of a threaded hole that engages with the screw shaft of the upper operating shaft 115. Further, a pressing portion 117b for pressing the rear surface of the upper clamping body 111 is formed on the front surface of the upper moving body 117. This pressing portion 117b extends and expands above the threaded engagement portion 117a, and is configured to press a portion above the insertion hole 113 (screw shaft) in the upper clamping body 111. Further, a pair of guided portions 117c are provided on both side surfaces of the upper moving body 117. The guided portions 117c are flat protrusions that protrude laterally. The guided portions 117c are held by the guide portion 106 of the fixed body main body 101, and are configured to be guided so that the upper moving body 117 can linearly move back and forth while maintaining its horizontal posture. Specifically, as shown in FIGS. 8(b) and 11(a), the upper moving body 117 is disposed between a pair of rail bodies 106a facing each other in the lateral direction, each side surface thereof abuts against the side surface of each rail body 106a, and each flat protrusion-shaped guided portion 117c is slidably fitted into each slide groove 106b. At this time, since the guided portion 117c has a flat shape, the tilting (rotation around the screw shaft or inclination forward and backward) of the upper moving body 117 is restricted, and its pressable posture is maintained. That is, the upper moving body 117 is restricted from rotating together in accordance with the rotation of the upper operating shaft 115. Further, since the rear end of the slide groove 106b is closed by the closing portion 106c, the upper moving body 117 is held so as not to fall from the fixed body main body 101.

[0032] That is, in the upper clamping mechanism, as shown in FIGS. 6 to 11, the upper clamping body 111 is arranged on the guide portion 106 of the fixed body main body 101, and the upper operation shaft 115 held by the fixed body main body 101 through the through hole 105 penetrates the upper clamping body 111. Then, by screwing the upper operation shaft 115 to the upper moving body 117 held by the guide portion 106, each component of the upper clamping mechanism is operably assembled to the fixed body main body 101. Since the upper moving body 117 is held by the guide portion 106 in a state where movement and tilting other than in the front-rear direction are restricted, the upper operation shaft 115 screwed to the upper moving body 117 is also held by the fixed body main body 101 in a state where tilting is restricted in the same manner. Also, when the upper moving body 117 is screwed to the tip of the upper operation shaft 115, the upper clamping body 111 is movable in the axial direction of the upper operation shaft 115. When fixing the wiring fixture fixing body 100 to the wall 11, it is preferable that both the upper clamping body 111 and the upper moving body 117 are located on the tip side of the upper operation shaft 115. Further, in the upper clamping mechanism, the upper clamping body 111 is in a clamping position facing the rear surface of the frame portion 102 of the fixed body main body 101 and capable of clamping the upper part of the periphery of the wall hole 12. This upper clamping body 111 is held by the fixed body main body 101 in a state where movement in the direction along the wall surface (at least in the vertical direction) is restricted and only movement in the front-rear direction is allowed. That is, the upper clamping body 111 always maintains a posture (clamping position) capable of clamping the wall 11 together with the fixed body main body 101.

[0033] Then, when the user performs a screwing operation on the screw head of the upper operation shaft 115 from the wall front side, as shown by the phantom line in FIG. 8, both the upper clamping body 111 and the upper moving body 117 can be screwed forward along the screw axis. Specifically, in accordance with the screwing of the upper operation shaft 115 in one direction, the upper operation shaft 115 idles with respect to the fixed body main body 101 and the upper clamping body 111 in a state where the tilting of the screw axis is restricted, and the screw axis advances with respect to the screwing portion 117a of the upper moving body 117. By the screwing of the upper operation shaft 115 and the upper moving body 117, only the upper moving body 117 advances along the screw axis. Then, the pressing portion 117b of the advancing upper moving body 117 can push the rear surface of the upper clamping body 111 to advance the upper clamping body 111 toward the wall 11.

[0034] Next, a lower clamping mechanism for clamping the lower periphery of the wall hole 12 together with the fixing body main body 101 will be described. The lower clamping mechanism is arranged on the back side of the wall through the wall hole 12 and includes a lower clamping body 121 configured to clamp the wall 11 together with the fixing body main body 101, a lower operating shaft 125 for operating the lower clamping body 121 by a pivoting 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 screwing operation of the lower operating shaft 125. The lower clamping mechanism has a configuration that is partially common with the upper clamping mechanism, but is specifically configured to clamp the lower periphery of the wall hole 12 in order to improve the workability of the user. In particular, in the upper clamping mechanism, the upper clamping body 111 is allowed to move only in the front-rear direction, while in the lower clamping mechanism, the lower clamping body 121 is allowed to move in the vertical direction in addition to the front-rear direction, which is the difference between the two clamping mechanisms. Hereinafter, the configuration of the lower clamping mechanism will be described in detail.

[0035] As shown in FIGS. 4 and 5, the lower clamping body 121 is formed in a plate 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 periphery 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 operating shaft 125 is inserted in a free-running state is formed at the center of the width of the lower portion of the lower clamping body 121. The long hole 123 extends in the vertical direction and has an upper end and a lower end. This long hole 123 is configured to loosely insert the screw shaft of the lower operating shaft 125 and allow free relative movement in the vertical direction of the screw shaft (i.e., the self-weight fall of the lower clamping body 121).

[0036] In addition, at the lower edge of the lower clamping body 121, a pair of cutout portions 121a for penetrating and arranging a pair of rail bodies 106a are formed by cutting. A pair of rail bodies 106a are respectively arranged in the pair of cutout portions 121a (see FIG. 10). The pair of cutout portions 121a function as a guided portion for moving the lower clamping body 121 in the front-rear direction (perpendicular to the wall surface) along the pair of rail bodies 106a. Further, the cutout portions 121a also function as a co-rotation restricting portion for restricting the co-rotation of the lower clamping body 121 with the lower operating shaft 125 by the engagement of their inner surfaces with the rail bodies 106a. Furthermore, each cutout portion 121a extends from the upper open end to the vicinity of the lower end of the lower clamping body 121. Thereby, the vertical relative movement of each rail body 106a within the cutout portion 121a 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 fixed body main body 101 (see FIG. 10). And as shown in FIG. 9, the lower clamping body 121 is movable vertically between a non-interference position where the lower clamping portion 122 (formed on its front surface) does not interfere with the wall 11 and a clamping position that is below the non-interference position.

[0037] Furthermore, on the laterally outer sides of the pair of cutout portions 121a of the lower clamping body 121, a pair of engaging portions 124 are provided. The engaging portion 124 is an elongated groove extending in the vertical direction and can receive an elongated tool such as a ruler. That is, as will be described later (see FIG. 22), the engaging portion 124 is configured to engage with a tool inserted through the insertion hole 108 from the front of the fixed body main body 101 in order to move the lower clamping body 121 from the clamping position to the non-interference position in the direction of the wall surface.

[0038] The lower operation shaft 125 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 lower operation shaft 125 can be composed of a general screw material. As shown in FIGS. 6, 9(a), and 11(b), the screw head portion of the lower operation shaft 125 is accommodated and held in the lower through hole 105 of the fixed 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 operation shaft 125 is attached or held to the fixed body main body 101 while being rotatable freely with respect to the lower clamping body 121 (elongated hole 123) and the fixed body main body 101 (through hole 105), and (with the tip side of the screw shaft supported by the lower moving body 127) the tilting of the screw shaft is restricted. The screw shaft of the lower operation shaft 125 has a length such that its tip penetrates the wall hole 12 from the front 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. And as shown in FIGS. 9(a) and 11(b), the lower operation shaft 125 penetrates the through hole 105 of the fixed body main body 101 from the front side and penetrates the elongated hole 123 of the lower clamping body 121 adjacent to the guide portion 106, thereby connecting the lower clamping body 121 to the fixed body main body 101 so as to be slidable back and forth. Since the tip of the screw shaft of the lower operation shaft 125 extends behind the closing portion 106c of the slide groove 106b of the rail body 106a, the lower clamping body 121 and the lower moving body 127 are effectively prevented from detaching from the lower operation shaft 125.

[0039] Also, as shown in FIGS. 9(a) and 10, the screw shaft of the lower operation shaft 125 is inserted into the elongated hole 123 so as to be freely relatively movable in the vertical direction. And 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 elongated hole 123 in a state where the screw shaft is inserted into the elongated hole 123. That is, in the natural state (clamping position), the lower clamping body 121 has the screw shaft positioned at the upper end within the elongated hole 123 and is suspended by the lower operation shaft 125. And the lower clamping body 121 can be lifted by the user so that the screw shaft relatively moves to the lower end within the elongated hole 123 and moves to an upper position (non-interference position) so as to approach the upper clamping body 111 (see FIG. 9).

[0040] 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 behind. As shown in FIGS. 4 and 5, 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 engagement 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 expands downward of the threaded engagement portion 127a, and is configured to press a portion below the long hole 123 (screw shaft) in the lower clamping body 121. Further, a pair of guided portions 127c are provided on both side surfaces of the lower moving body 127. The guided portions 127c are flat protrusions protruding laterally. The guided portions 127c are held by the guide portion 106 of the fixed body main body 101, and are configured to be guidable so that the lower moving body 127 can linearly move back and forth while maintaining its horizontal posture. Specifically, as shown in FIGS. 9(b) and 11(b), the lower moving body 127 is disposed between a pair of rail bodies 106a facing each other in the lateral direction, and each side surface thereof abuts against the side surface of each rail body 106a, and each flat protrusion-shaped guided portion 127c is slidably fitted into each slide groove 106b. At this time, since the guided portion 127c has a flat shape, 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 with the rotation of the lower operating shaft 125. Further, since the rear end of the slide groove 106b is closed by the closing portion 106c, the lower moving body 127 is held so as not to fall from the fixed body main body 101.

[0041] That is, in the lower clamping mechanism, as shown in FIGS. 6 to 11, the lower clamping body 121 is arranged with respect to the guide portion 106 of the fixed body main body 101, and the lower operating shaft 125 held by the fixed body main body 101 through the through hole 105 penetrates the lower clamping body 121, and the lower operating shaft 125 is screwed to the lower moving body 127 held by the guide portion 106, whereby each component of the lower clamping mechanism is operably assembled to the fixed body main body 101. Since the lower moving body 127 is held 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 fixed 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 fixture fixing 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, opposed to the rear surface of the frame portion 102 of the fixed body main body 101 and is in a clamping position where it can clamp the lower periphery of the wall hole 12. This lower clamping body 121 is held by the fixed 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 periphery of the wall hole 12 together with the fixed 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.

[0042] Further, when the user performs 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. 9, 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 fixed body main body 101 and the lower clamping body 121 while the inclination of the screw axis is restricted, and the screw axis advances with respect to the screw engagement portion 127a of the lower moving body 127. Due to the screw engagement between 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.

[0043] Next, with reference to FIGS. 12 to 15, a fixture installation structure 10 in which a wiring fixture 15 is installed in a wall hole 12 of a wall 11 will be described. FIG. 12 is a schematic perspective view seen from the wall surface showing the fixture installation structure 10. FIG. 13 is a schematic front view seen from the wall surface showing the fixture installation structure 10. FIG. 14 is a schematic rear view seen from the back of the wall of the fixture installation structure 10. FIG. 15 is a cross-sectional view taken along line F-F of the fixture installation structure 10. Since the wiring fixture 15 is a general fixture such as a switch or a power outlet, the description of its internal structure and wiring is simplified or omitted.

[0044] In the fixture installation structure 10, the fixed body main body 101 of the wiring fixture fixing body 100 is attached to the periphery of the wall hole 12 formed in the wall 11. As shown in FIGS. 12 and 13, the frame portion 102 of the fixed body main body 101 covers the periphery of the wall hole 12 from the wall surface. The opening 103 of the fixed body main body 101 communicates with the wall hole 12, and the wiring fixture 15 is fitted to the fixture attachment portion 104, and the wiring fixture 15 faces the wall surface. As shown in FIGS. 14 and 15, the guide portion 106 (rail body 106a), the upper operation shaft 115, and the lower operation shaft 125 of the wiring fixture fixing body 100 penetrate the wall hole 12 and their tips protrude 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.

[0045] At the upper periphery of the wall hole 12, as shown in FIGS. 14 and 15, the upper clamping body 111 and the upper moving body 117 are arranged on the back side of the wall, and the wall 11 is clamped between the upper clamping portion 112 and the frame portion 102 of the fixed body main body 101. In particular, the pressing portion 117b of the upper moving body 117 is above the upper operating shaft 115 and presses the upper clamping body 111 from the rear at a position closer to the contact portion between the upper clamping portion 112 and the wall surface. Also, since the upper operating shaft 115 is not inclined, the upper clamping portion 112 is firmly in contact with the wall surface. That is, the pressing force from the upper moving body 117 is effectively transmitted to the upper clamping body 111, and the upper clamping portion 112 is firmly pressed against the wall surface. As a result, in the fixture installation structure 10, the upper clamping body 111 and the fixed 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. 14 and 15 in the same manner, 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 between the lower clamping portion 122 and the frame portion 102 of the fixed body main body 101. In particular, the pressing portion 127b of the lower moving body 127 is below the lower operating shaft 125 and presses the lower clamping body 121 from the rear at a position closer to the contact portion between the lower clamping portion 122 and the wall surface. Also, since the lower operating shaft 125 is not inclined, 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 fixture installation structure 10, the lower clamping body 121 and the fixed body main body 101 cooperate to firmly clamp the lower periphery of the wall hole 12. Therefore, in the fixture installation structure 10, the wiring fixture 15 is stably installed on the wall 11.

[0046] Subsequently, a method of constructing the fixture installation structure 10 by installing the wiring fixture fixing body 100 and the wiring fixture 15 with respect to the wall hole 12 formed in the wall 11 will be described.

[0047] First, the user pulls out the cable wired inside the wall from the wall hole 12 and connects it to the wiring device 15 attached to the device attachment part 104 of the wiring device fixing body 100. Then, as shown in FIG. 16, the wiring device fixing body 100 is gripped on the wall surface side so that the upper (lower) part of the wiring device fixing body 100 is located vertically upward (downward). Then, the lower clamping body 121 is lifted vertically upward and displaced from the clamping position (in the natural state) to the non-interference position. When the lower clamping body 121 is in the non-interference position, the distance between the upper clamping body 111 and the lower clamping body 121 becomes the minimum, and it becomes possible to pass the wiring device fixing body 100 through the wall hole 12 without interfering with the wall 11. For example, as shown in FIG. 17, the user can pass the wiring device fixing body 100 through the wall hole 12 by tilting the posture of the wiring device fixing body 100 obliquely. After the upper clamping body 111 and the lower clamping body 121 are arranged inside the wall through the wall hole 12, the rear surface of the frame part 102 of the wiring device fixing body 100 is brought into contact with the wall surface so as to attach the fixing body main body 101 to the periphery of the wall hole 12. Note that the lower clamping body 121 in the non-interference position is also arranged at a position that avoids interference with the wiring device 15 attached to the device attachment part 104. Specifically, since the pair of rail bodies 106a extend further rearward than the rear surface of the attached wiring device 15, the lower clamping body 121 can be arranged behind the wiring device 15.

[0048] When at least the lower clamping body 121 is inserted inside the wall through the wall hole 12, as shown in FIG. 18, the lower clamping body 121 falls by its own weight and is displaced from the non-interference position to the clamping position. As shown in FIG. 19, when the upper clamping body 111 is arranged at a position facing the upper part of the periphery of the wall hole 12 inside the wall, the lower clamping body 121 is also arranged at a position facing the lower part of the periphery of the wall hole 12. At this time, since the upper clamping body 111 always maintains a posture capable of clamping the wall 11, 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.

[0049] During the above process, as shown in FIG. 20, when the lower clamping body 121 is in a position close to the fixed body main body 101 and remains in the wall hole 12, by inserting a driver 16 (tool) through the insertion port from the front of the fixed body main body 101 and pressing the lower clamping body 121, the lower clamping body 121 can be forcibly retracted backward into the wall, and then guided to the clamping position by its own weight drop.

[0050] Subsequently, while maintaining the installation position of the wiring device fixing body 100, the user fixes the wiring device fixing body 100 to the wall 11 by operating the upper clamping mechanism and the lower clamping mechanism respectively.

[0051] Specifically, as shown in FIG. 21(a), by rotating the screw head of the upper operation shaft 115 in one direction from the wall surface with a driver 16 (tool), the upper moving body 117 screws in while pushing the upper clamping body 111 from the rear and approaching 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 edge of the periphery 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 fixed body main body 101.

[0052] Similarly, as shown in FIG. 21(b), by rotating the screw head of the lower operation shaft 125 in one direction from the wall surface with a driver 16 (tool), the lower moving body 127 screws in while pushing the lower clamping body 121 from the rear and approaching the wall 11. At this time, since the tilting of the screw shaft of the lower operation 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, and the wall 11 can be clamped in cooperation with the fixed body main body 101.

[0053] 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 fixing body main body 101, the upper clamping body 111, and the lower clamping body 121 cooperate to clamp the wall 11, and the wiring fixture fixing body 100 is firmly fixed to the wall 11. In this way, the user can construct the fixture installation structure 10.

[0054] On the other hand, after the upper clamping body 111 and the lower clamping body 121 are once arranged on the back side of the wall through the wall hole 12, if it is necessary to take out the wiring fixture fixing body 100 to the front side of the wall for work convenience, since the lower clamping body 121 is in the clamping position, it interferes with the wall 11 and is difficult to take out. In such a case, as shown in FIG. 22, a scale 17 (tool) is inserted into any one of the insertion holes 108 on the left or right of the fixing body main body 101 from the front side of the wall, and the scale 17 inserted into the back side of the wall is engaged with the engaging portion 124 of the lower clamping body 121, thereby lifting the lower clamping body 121 and moving it from the clamping position to a non-interfering position from the front side of the wall. Then, the wiring fixture fixing body 100 can be taken out to the front side of the wall through the wall hole 12 without interfering with the wall 11.

[0055] Hereinafter, the operation and effect of the wiring fixture fixing body 100 according to an embodiment of the present invention will be described.

[0056] According to the wiring fixture fixing body 100 of the present embodiment, at least the lower clamping body 121 is pressed from behind by the lower moving body 127 that screws toward the wall 11 by the screwing operation of the lower operating shaft 125 having a screw shaft, so as to clamp the wall 11 together with the fixing body main body 101. The screw shaft of the lower operating shaft 125 is rotatable idly with respect to the lower clamping body 121 and the fixing body main body 101, and is attached to the fixing 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 fixing body main body 101 so as to rotate idly with respect to the lower clamping body 121 and not tilt, 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 edge of the peripheral edge of the wall hole 12 together with the fixing 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, while the user inserts the lower clamping body 121 through the wall hole 12 while maintaining the lower clamping body 121 in the non-interference position and then simply releases the hand from the lower clamping body 121, the lower clamping body 121 falls by its own weight and can be arranged at the clamping position after passing through the wall hole 12. Then, the user can easily fix the wiring fixture fixing body 100 to the wall 11 by screwing the lower operating shaft 125 without holding the lower clamping body 121. Further, 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 fixture fixing body 100 can be firmly fixed to the wall, and stable fixing of the wiring fixture 15 to the wall 11 is also possible. Therefore, the wiring fixture fixing body 100 of the present embodiment improves the installation work of the wiring fixture 15 on the wall 11.

[0057] The present invention is not limited to the above embodiment, and various modifications are possible. Hereinafter, modifications of the present invention will be described.

[0058] (1) The wiring fixture fixing body of the present invention is not limited to the above-described embodiment. In the above embodiment, the upper clamping body is configured to be pressed by the upper moving body that screws the upper operating shaft, but the present invention is not limited to this. That is, the upper clamping body may be configured to clamp the wall together with the fixing body main body, and its form may be changed to any configuration. For example, the upper clamping body may be configured to rotate by screwing a screw, be rotatably movable between a clamping position and a retracted position, and be configured to move along the screw toward the wall with the rotation restricted at the clamping position. Such a configuration is disclosed in, for example, the prior art document (Japanese Patent Application Laid-Open No. 2000-201415).

[0059] (2) The wiring fixture fixing body of the present invention is not limited to the above-described embodiment. In the above embodiment, the shape of the wiring fixture fixing body is determined based on the rectangular wall hole, but the present invention is not limited to this. For example, the wall hole formed in the wall may be circular, oval, elliptical, polygonal, any irregular shape, etc. The wiring fixture fixing body can be appropriately designed and changed according to the shape of the wall hole by those skilled in the art under the technical idea of the present invention.

[0060] The present invention is not limited to the above-described embodiments and modifications, and can be implemented in various aspects as long as it belongs to the technical scope of the present invention.

Explanation of Reference Numerals

[0061] 10 Appliance installation structure 11 Wall 12 Wall hole 15 Wiring fixture 16 Driver (tool) 17 Gauge (tool) 100 Wiring fixture fixing body 101 Fixing body main body 102 Frame portion 103 Opening 104 Appliance mounting portion 105 Through hole 106 Guide portion 106a Rail body 106b Slide groove 106c Occlusion part 107 Difference inlet 108 Insertion hole 111 Upper clamping body 111a Notch 112 Upper clamping part 113 Insertion hole 115 Upper operating shaft 117 Upper moving body 117a Screwed part 117b Pressing part 117c Guided part 121 Lower clamping body 121a Notch 122 Lower clamping part 123 Long hole 124 Engaging part 125 Lower operating shaft 127 Lower moving body 127a Screwed part 127b Pressing part 127c Guided part

Claims

1. A wiring fixture fixing body for fixing a wiring fixture to a wall hole formed in a wall, comprising: a fixture attachment portion for attaching the wiring fixture, a fixing body main body attached from the wall surface side to the periphery of the wall hole, an upper clamping body disposed on the back side of the wall through the wall hole, having an upper clamping portion that abuts from the back side of the wall against the upper part of the periphery of the wall hole, and configured to clamp the wall together with the fixing body main body, a lower clamping body disposed on the back side of the wall through the wall hole, having a lower clamping portion that abuts from the back side of the wall against the lower part of the periphery of the wall hole, and configured to move proximally toward the wall by an operation from the wall surface side and clamp the wall together with the fixing body main body, a screw head portion rotatable from the wall surface side, and a screw shaft extending from the screw head portion, the screw shaft being disposed so as to penetrate the lower clamping body, being rotatable freely with respect to the lower clamping body and the fixing body main body, and held by the fixing body main body in a state where tilting of the screw shaft is restricted, a lower operation shaft for operating the lower clamping body, a lower moving body screwed to the lower operation shaft behind the lower clamping body, configured to screw forward toward the wall in accordance with rotation of the screw shaft in one direction and press the lower clamping body from behind, the lower clamping body is provided with a long hole into which the screw shaft of the lower operation shaft is inserted so as to be freely relatively movable in the vertical direction, the lower clamping body is movable between a non-interference position where it can pass through the wall hole without interfering with the wall by relative movement of the screw shaft in the long hole, and a clamping position where it can clamp the lower part of the periphery of the wall hole together with the fixing body main body, and is displaceable from the non-interference position to the clamping position by free fall of the lower clamping body. A wiring fixture fixing body characterized by this.

2. The wiring fixture fixing body according to claim 1, characterized in that the upper clamping body always maintains a posture capable of clamping the wall together with the fixing body main body.

3. The wiring fixture fixing body according to claim 1 or 2, characterized in that the lower moving body has a pressing portion that presses a portion below the screw shaft in the lower clamping body when the lower clamping body is in the clamping position.

4. The lower clamping body is provided with an engaging portion that engages with a tool inserted from the front of the fixed body main body in order to move the lower clamping body from the clamping position to the non-interference position in the direction of the wall surface side. The wiring fixture fixing body according to claim 1 or 2, characterized in that.

5. The fixed body main body is formed with an insertion port for inserting a tool, which is arranged at least in front of the lower clamping body in the clamping position. By inserting the tool into the insertion port from the front of the fixed body main body and pressing the lower clamping body, the lower clamping body can be forcibly retracted. The wiring fixture fixing body according to claim 1 or 2, characterized in that.

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