Fixed body

Abstract

To provide a fixed body which allows easy insertion of a screw while simplifying steps in fixing a screw to a fixed surface.SOLUTION: A fixed body which can be fixed to a fixed surface 100 with a screw 70, comprises: a fixing hole 50 into which a shaft part 72 of the screw 70 can be inserted in a first direction; and a blocking plate 51 that is connected to the fixing hole 50 by a connection part 52 which can be broken, thus blocking the fixing hole 50. The blocking plate 51 is provided with a recess 53 recessed in the first direction, and a second recess recessed in a second direction opposite to the first direction. The fixing hole 50 can be brought into contact with the fixed surface 100 during construction.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to a fixed body that can be fixed to a fixed surface of a building or the like with a screw. [Background technology]

[0002] Conventionally, fixed bodies such as distribution boxes and the like are fixed to a fixed surface of a building or the like with screws. One such fixed body is described in Patent Document 1. In the fixed body described in Patent Document 1, the holes into which the screws are inserted are blocked with blocking members, and by removing the blocking members before fixing with the screws, the screws can be inserted into the holes and screwed into the fixed surface, thereby enabling fixing. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-184992 Summary of the Invention [Problem to be solved by the invention]

[0004] In the fixture described in Patent Document 1, the blocking member must be removed before the screw can be inserted, which increases the number of steps required to attach the fixture to the surface to be fixed. Also, since precision in positioning is required to insert the screw into the hole, the construction requires the mastery of skills.

[0005] The present invention has been made to solve the above-mentioned problems, and its main object is to provide a fixed body that simplifies the process of fixing to a fixed surface with screws and makes it easy to insert screws. [Means for solving the problem]

[0006] The first configuration is a fixed body that can be fixed to a fixed surface with a screw, and includes a fixing hole into which the shank of the screw can be inserted in a first direction, and a blocking plate that can block the fixing hole, and the blocking plate has a recess that is recessed toward the first direction.

[0007] In the first configuration, the recess can be used to determine the tip position of the screw and penetrate the closure plate without removing it, making it easier to position the screw when fixing the fixed body to a non-fixed surface and simplifying the construction process.

[0008] In the second configuration, in addition to the first configuration, the recess is located at the center of the fixing hole.

[0009] In the second configuration, the screw can be driven into the center of the fixing hole, and therefore, it is possible to suitably prevent the screw from becoming misaligned when fixing the fixing body to the non-fixing surface.

[0010] In a third configuration, in addition to the first or second configuration, the closure plate is connected to the inner surface of the fixing hole by a breakable connection portion.

[0011] In the third configuration, the closure plate can be removed to allow for other fixing methods to be employed. Also, if the screw and the fixing body rotate together when the closure plate is penetrated using a screw, the connecting portion can be broken to release the connection between the closure plate and the fixing hole, thereby preventing the screw and the fixing body from rotating together.

[0012] The fourth configuration, in addition to the third configuration, further includes a rotation suppressing means for suppressing rotation of the closure plate around the first direction.

[0013] In the fourth configuration, co-rotation of the screw when it is screwed into the closure plate is suppressed, so the screw can be screwed in efficiently. Also, even if the connecting portion is broken, the screw can be screwed in as long as co-rotation is suppressed by a rotation suppression means different from the connecting portion.

[0014] The fifth configuration is the same as the third or fourth configuration, in that the closure plate has a second recess formed on the side opposite to the side on which the recess is provided, which is recessed in a direction opposite to the first direction.

[0015] In the fifth configuration, the portion between the recess and the second recess of the closure plate is thin, allowing the screw to be easily inserted. Also, by providing the second recess, a tool can be engaged in the second recess to punch out the closure plate, making it possible to use a large-diameter bolt or the like to fix the closure plate in place of a screw inserted into the recess.

[0016] A sixth configuration is the same as any one of the first to fifth configurations, in which the closure plate can come into contact with the fixed surface when fixed to the fixed surface.

[0017] In the sixth configuration, since there is no gap between the closure plate and the fixed surface, the screw that penetrates the closure plate reaches the fixed surface continuously, and the impact when the screw penetrates the closure plate can be suppressed. Furthermore, when the closure plate is connected to the fixing hole by a connecting portion, friction between the closure plate and the fixed surface suppresses breakage of the connecting portion due to rotation of the closure plate around the first direction. In addition, since the force in the first direction, which is the screw-threading direction, is applied to the fixed surface rather than the connecting portion, breakage of the connecting portion can also be suppressed in this respect.

[0018] A seventh configuration is the same as any one of the first to sixth configurations, in which the fixing body is box-shaped with a bottom, the fixing hole is formed in the bottom wall, and the recess is provided on the inner space side.

[0019] In the seventh configuration, if the screw is not passed through the recess or the blocking plate is not removed, the fixing hole is blocked, so that when the fixed body is installed outdoors, the infiltration of rainwater and the like from the bottom wall side can be prevented. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] Cross-sectional view taken along line AA. [Figure 6] FIG. 6 is an enlarged view of FIG. [Figure 7] Cross-sectional view taken along line BB. [Figure 8] FIG. 8 is an enlarged view of FIG. [Figure 9] 10A and 10B are diagrams illustrating a state in which the tapping screw starts to be screwed in. FIG. [Figure 10] 10A and 10B are diagrams illustrating a state in which a tapping screw is screwed in and fixed to a fixed surface. [Figure 11] 10A and 10B are diagrams illustrating a method for removing the closure plate. [Figure 12] 10 is a diagram illustrating the case where the closure plate is removed and fixed with bolts. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0021] The fixed body 10 according to the embodiment is a distribution box, and as shown in Figures 1 to 4, has an overall rectangular parallelepiped shape and is a box-like shape with a bottom and an open front. Conduits are introduced from the outside into the internal space of the fixed body 10, and electrical wires are connected to each other and to various electrical devices in the internal space of the fixed body 10. The fixed body 10 is installed on a wall surface of a building as a fixed surface 100, and is installed so that the back surface of the fixed body faces the fixed surface 100. In the following description, the top-bottom direction is defined as the up-down direction.

[0022] The fixed body 10 is a box-like body with a bottom that is open at the front, and is integrally molded from hard resin. The fixed body 10 is surrounded on all sides by side walls that extend vertically forward and have a substantially uniform thickness. The top and bottom side walls are referred to as the upper side wall 21 and the lower side wall 22, respectively, and the left and right side walls are referred to as the left side wall 31 and the right side wall 32, respectively. The rear surface is referred to as the bottom wall 41 because it can be considered the bottom surface of the box-like body with a bottom, but it can also be referred to as the rear wall based on the definition of the front-to-rear direction.

[0023] Each of the upper wall 21 and the lower wall 22 is provided with a connection port 23 that opens in the front-to-rear direction. This connection port 23 is a circular opening with a spiral ridge 24 provided inside. Each of the upper wall 21 and the lower wall 22 is provided with a protrusion 25 above the connection hole 23 that protrudes toward the internal space of the fixed body 10, and a nut 26 is attached non-rotatably near the tip of this protrusion 25. In addition, a protrusion 27 that protrudes slightly upward is provided near the nut 26.

[0024] A central opening 42, which is a circular hole that can penetrate in the front-to-rear direction, is provided in the center of the bottom wall 41. This central opening 42 is closed by a central blocking plate 43. This central blocking plate 43 is disk-shaped and has a diameter slightly smaller than that of the central opening 42, and shares a common center with the central opening 42. As shown in FIG. 8 , the thickness of the central blocking plate 43 is slightly thinner than that of the bottom wall 41, and the center position of the central blocking plate 43 in the front-to-rear direction coincides with the center position of the bottom wall 41 in the front-to-rear direction. A connecting portion 44 is provided in the gap between the central blocking plate 43 and the central opening 42, connecting the inner surface of the central opening 42 to the outer surface of the central blocking plate 43. This connecting portion 44 is thinner than the central blocking plate 43 and is provided around the entire circumference, so that the central opening 42 is closed without any gaps by the central blocking plate 43 and the connecting portion 44. In addition, two holding portions 45 are provided on the front side of the bottom wall 41, which are capable of holding appliance fixing bolts that are threaded onto nuts 26 and are used to fix the wiring appliance to the protruding portion 25.

[0025] Six fixing holes 50, which are circular holes that can penetrate in the front-rear direction, are provided in the bottom wall 41. These fixing holes 50 are provided in groups of three near each of the left side wall 31 and the right side wall 32, so as to be aligned at equal intervals in the vertical direction.

[0026] 5 and 6, each fixing hole 50 is closed by a closing plate 51. The closing plate 51 has a bi-frustum shape formed by connecting a truncated cone that shares a center with the fixing hole 50 and whose outer diameter gradually decreases from the middle of the fixing hole 50 in the fore-and-aft direction toward the front, and a truncated cone that gradually decreases from the middle of the fixing hole 50 in the fore-and-aft direction toward the rear. The front and rear ends of the closing plate 51 are both flat, with the plane of the front end coplanar with the front surface of the bottom wall 41 and the plane of the rear end coplanar with the back surface of the bottom wall 41.

[0027] The outer diameter of the middle portion of the bicone-shaped closure plate 51 in the front-to-rear direction, i.e., the portion where the outer diameter is largest, is smaller than the inner diameter of the fixing hole 50, and a connecting portion 52 that connects the inner peripheral surface of the fixing hole 50 to the closure plate 51 is provided in the gap. This connecting portion 52 is provided around the entire circumference, protruding like a flange from the outer periphery of the closure plate 51 and connecting to the inner peripheral surface of the fixing hole 50. In other words, the fixing hole 50 is closed without any gaps by the closure plate 51 and the connecting portion 52. It can also be said that the closure plate 51 has the connecting portion 52, and in this case, it can be said that the fixing hole 50 is closed by the closure plate 51 having the connecting portion 52.

[0028] The front end of the closure plate 51 is provided with a recess 53 recessed in a first direction, i.e., from front to rear. The recess 53 has a circular cross section, a uniform cross section in the front-to-rear direction, and extends from the midpoint of the closure plate 51 to a position slightly forward. Meanwhile, the rear end of the closure plate 51 is provided with a second recess 54 recessed in a second direction, i.e., from rear to front. The second recess 54 has a circular cross section with the same diameter as the recess 53, a uniform cross section in the front-to-rear direction, and extends from the midpoint of the closure plate 51 to a position slightly rearward. The centers of the recess 53 and the second recess 54 coincide with the centers of the fixing holes 50 and the closure plate 51. Because the recess 53 and the second recess 54 are provided as described above, it can be said that a thin, circular partition wall 55 is provided between the recess 53 and the second recess 54. The thickness of the connecting portion 52 in the front-to-rear direction is thinner than the thickness of the partition wall 55.

[0029] Above and below the central opening 42, second fixing holes 60, which are circular holes that can penetrate in the front-rear direction, are provided. These second fixing holes 60 are also closed by second closure plates 61, as shown in FIGS. 7 and 8 . This second closure plate 61 has a truncated cone shape whose outer diameter gradually decreases toward the rear. Its front end is flush with the front surface of the bottom wall 41, and its rear end is located forward of the rear surface of the bottom wall 41. The outer diameter of the front end of this second closure plate 61 is smaller than the inner diameter of the second fixing holes 60, and a second connecting portion 62 that connects the inner circumferential surface of the second fixing hole 60 and the second closure plate 61 is provided in the gap. This second connecting portion 62 protrudes in a flange-like shape from the outer periphery of the second closure plate 61 and is connected to the inner circumferential surface of the second fixing hole 60, and the front surface of the connecting portion 62 forms a uniform plane with the front surface of the bottom wall 41. That is, the second fixing hole 60 is closed by the second closing plate 61 and the connecting portion 62 without leaving any gaps.

[0030] A third recess 63 recessed forward is provided on the rear end side of the second closure plate 61. This third recess 63 has a circular cross section that is uniform in the front-to-rear direction and extends to a position slightly rearward of the front end of the second closure plate 61. In addition, the center of the third recess 63 coincides with the center of the second fixing hole 60 and the center of the second closure plate 61.

[0031] A method for fixing the fixed body 10 configured as described above to the fixed surface 100 will be described with reference to Figures 9 to 12. Note that the fixing method is the same regardless of which fixing hole 50 is used, and the fixing hole 50 to be used is selected depending on the shape of the fixed surface 100. Note that since the fixed surface 100 is a wall surface of a building, the up-down direction in Figures 9 to 12 actually corresponds to the front-to-rear direction.

[0032] First, the case of fixing using a tapping screw 70 will be described with reference to Figures 9 and 10. The diameter of the head 71 of the tapping screw 70 used for fixing is larger than the diameter of the fixing hole 50, and the outer diameter of the thread of the shaft 72 is larger than the inner diameter of the recess 53 but smaller than the inner diameter of the fixing hole 50.

[0033] First, the fixture 10 is placed at a fixing location on the fixed surface 100. At this time, the back surface of the bottom wall 41 of the fixture 10 and the back surface of the closure plate 51 abut against the front surface of the fixed surface 100. Next, the tip of the shaft 71 of the tapping screw 70 is inserted from the front side of the recess 53 toward the rear (first direction). In FIG. 9, the tip of the shaft 72 of the tapping screw 70 abuts against the partition wall 55, but it is sufficient if a portion of the tip of the shaft 72 of the tapping screw 70 enters the recess 53. When the tapping screw 70 is rotated in this state, the threads of the tapping screw 70 cut a thread groove into the closure plate 51 and are screwed in. At this time, the bottom wall 41 and the closure plate 51 are connected by the connecting portion 52, and rotation of the closure plate 51 is suppressed by friction between the bottom plate 41 and the fixed surface 100. Therefore, the connecting portion 52 can be referred to as a rotation suppressing means.

[0034] If the tapping screw 70 is further screwed in, its tip will penetrate the closure plate 51 and reach the fixed surface 100. The tapping screw can be screwed into the fixed surface 100 even if no hole is provided in the fixed surface 100. However, a female thread may be formed in advance and the tapping screw 70 may be screwed into the female thread, or a hole smaller than the outer diameter of the thread of the tapping screw 70 may be drilled and the tapping screw 70 may be screwed into the hole while cutting a thread groove. As shown in FIG. 10 , when the tapping screw 70 is screwed in all the way, the bottom surface of the head of the tapping screw 70 abuts against the front surface of the closure plate 51, completing the fixation of the fixture 10 to the fixed surface 100. In Figure 10, most of the closure plate 51 is destroyed by the tapping screw 70, and the connecting portion 52 remains, but if the shaft 72 of the tapping screw 70 is thicker than that shown in Figure 10, even part of the connecting portion 52 may be destroyed, and if the shaft 72 of the tapping screw 70 is thinner than that shown in Figure 10, the closure plate 51 will not be destroyed as much as shown in Figure 10.

[0035] Next, a case where the fixture 10 is fixed to the fixed surface 100 using a bolt 90 or the like will be described with reference to FIGS. 11 and 12 . The diameter of the head of the bolt 90 or the like used for fixing is larger than the diameter of the fixing hole 50, and the outer diameter of the thread is smaller than the diameter of the fixing hole 50. When the bolt 90 or the like is used, the closure plate 51 is removed. Specifically, as shown in FIG. 11 , a tool 80 is inserted into the second recess 53 from rear to front (second direction). The type of this tool 80 is not particularly limited, but it is preferable that the tool 80 has a thin tip and is made of a metal or the like that is harder than the fixture 10. Then, when the side of the tool 80 opposite the side inserted into the second recess 53 is struck with a hammer or the like, the impact breaks the connecting portion 52, releasing the connection between the fixing hole 50 and the closure plate 51, and the closure plate 51 is removed. Once the closure plate 51 has been removed, as shown in Fig. 12, bolts 90 or the like are inserted from the front into the fixing holes 50 and screwed into female screws or nuts (not shown) provided on the side of the fixed surface 100, thereby completing the fixing of the fixed body 10 to the fixed surface 100. Note that in Fig. 10, the front-to-rear direction is aligned with the other figures, so the tool 80 is inserted from the rear to the front, but in actual construction, the back surface of the fixed body 10 is positioned facing upward, and the tool 80 is inserted into the second recess 53 facing upward to remove the closure plate 51.

[0036] Furthermore, when fixing the fixing body 10 to the fixing surface 100 using a bolt or the like, the second fixing hole 60 can also be used. In this case, similar to the case where the fixing hole 50 is used, the closure plate 61 is removed and then the bolt or the like is inserted into the second fixing hole 60.

[0037] After the fixed body 10 is fixed to the fixed surface 100 in the above manner, an electric conduit is introduced from the outside of the fixed body 10 into the internal space using the upper wall 21 and the lower wall 22. Specifically, the connector (not shown) of the electric conduit is screwed onto the ridge 24 and inserted into the connection port 23. An electric device or the like is attached to the internal space of the fixed body 10 using a nut 26, and an electric wire is connected to the electric device or the like. The electric conduit and the protruding portion 24 can also be fixedly connected using the protrusion 27.

[0038] When introducing the electrical conduit into the fixed body 10, the electrical conduit may be pulled out from an opening formed in the wall of the building, which is the fixed surface 100, and introduced into the interior of the fixed body 10 through the central opening 42. In this case, the central closing plate 43 is removed to open the central opening 42, and then the electrical conduit can be introduced from the back side of the fixed body 10.

[0039] With the above-described configuration, the fixed body 10 according to this embodiment has the following advantages.

[0040] The recess 53 can be used to determine the tip position of the tapping screw 70 while penetrating the closure plate 51 without removing the closure plate 51, making it easier to position the tapping screw 70 when fixing the fixed body 10 to the non-fixed surface 100, and simplifying the construction process.

[0041] Since the recess 53 is provided at the center of the fixing hole 50, the tapping screw 70 can be driven into the center of the fixing hole 50, and misalignment of the tapping screw 70 when fixing the fixing body 10 to the non-fixing surface 100 can be effectively prevented.

[0042] By removing the closure plate, a fixing method other than the fixing method using the tapping screw 70 can be adopted, which increases the options for fixing to the fixing surface 100.

[0043] If the tapping screw 70 and the fixed body 10 rotate together when the tapping screw 70 is used to penetrate the closure plate 51, the connecting portion 52 can be broken to release the connection between the closure plate 51 and the fixing hole 50, thereby preventing the tapping screw 70 and the fixed body 10 from rotating together.

[0044] The partition wall 55 between the recess 53 and the second recess of the closure plate 51 is thin, so that the tapping screw 70 can be easily passed through. Furthermore, by providing the second recess, the closure plate 51 can be punched out by engaging a tool 80 in the second recess, so that it is possible to use a large-diameter bolt 80 or the like other than the tapping screw 70 for fixation.

[0045] Since the blocking plate 51 can abut against the fixed surface 100, the tapping screws 70 that penetrate the blocking plate 51 reach the fixed surface 100 in succession, thereby suppressing the impact when the tapping screws 70 penetrate the blocking plate 51.

[0046] Because the closure plate 51 can abut against the fixed surface 100, friction between the closure plate 51 and the fixed surface 100 prevents the closure plate 51 from rotating around the first direction, thereby preventing breakage of the connecting portion 52. In addition, the force acting in the first direction (rearward), which is the screwing direction of the tapping screw 70, is applied to the fixed surface 100, not to the connecting portion 52, which also effectively prevents breakage of the connecting portion 52. As a result, the tapping screw 70, whose tip has embedded, and the closure plate 51 do not rotate together within the fixing hole 50 due to breakage of the connecting portion 52, and this effectively prevents the tapping screw 70 from not passing through.

[0047] If the tapping screw 70 is not inserted into the recess 53 or if the blocking plate 51 is not removed, the fixing hole 50 is blocked, so that when the fixed body 10 is installed outdoors, it is possible to prevent rainwater and the like from entering from the bottom wall 41 side.

[0048] <Modification> In the embodiment, the fixed body 10 is a bottomed box-shaped distribution box, but it may be used for purposes other than a distribution box, and it does not have to be a bottomed box-shaped box, as long as it can be fixed to the fixed surface 100. Furthermore, the fixed body 10 may be installed indoors, and the fixed surface 100 may be a ceiling or floor surface other than a side wall of a building, etc., in which case the top and bottom directions of the fixed body 10 will be different from those in the embodiment.

[0049] In the embodiment, the connecting portion 52 is provided around the entire circumference of the closure plate 51, but a gap may be provided in part of the circumference to connect part of the outer periphery of the closure plate 51 with part of the inner periphery of the fixing hole 50. In this case, the strength of the connecting portion 52 is reduced, making it easier to remove the closure plate 51. Also, although the connecting portion 52 is located at the center of the fixing hole 50 in the fore-and-aft direction, it may be located closer to the front or rear.

[0050] In the embodiment, the second recess 54 is provided on the back side of the closure plate 51, but the second recess 54 does not have to be provided. In this case, if it becomes necessary to remove the closure plate 51, the closure plate 51 can be punched out from the front, for example. Also, even if the second recess 54 is provided, the closure plate 51 can be punched out from the front. In the embodiment, since the fixed body 10 is box-shaped with a bottom, it is preferable to punch out the closure plate 51 from the back side, but if the fixed body 10 is plate-shaped, for example, punching out from the front can be done quite easily.

[0051] The recess 53 may be provided at a position offset from the center of the closure plate 51. In this case, even if the connecting portion 52 is broken, the rotation of the closure plate 51 caused by the rotation of the tapping screw 70 can be prevented. In this case, the shape of the closure plate 51 can be said to function as a rotation prevention means. Also, a protrusion or the like that can mesh with each other may be provided on the inner peripheral surface of the fixing hole 60 and the outer peripheral surface of the closure plate 51, and the protrusion may function as a rotation prevention means when the connecting portion 52 is broken.

[0052] In the embodiment, the back surface of the bottom wall 41 and the back surface of the closure plate 51 are located on the same plane, but the back surface of the closure plate 51 may be located forward, and a gap may be formed between the closure plate 51 and the fixed surface 100 when fixed to the fixed surface 100. Furthermore, the front surface of the bottom wall 41 and the front surface of the closure plate 51 do not have to be located on the same plane. In other words, like the central closure plate 43, the closure plate 51 may be formed thinner than the bottom wall 41.

[0053] The connecting portion 52 may not be provided, and a member corresponding to the closure plate 51 may be formed separately from the fixed body 10, and the member corresponding to the closure plate 51 may be inserted into the fixing hole 50. In this case, anti-rotation means such as interlocking protrusions may be provided on the periphery of the member corresponding to the closure plate 51 and on the inner circumferential surface of the fixing hole 50 to prevent the closure plate 51 from rotating together with the rotation of the tapping screw 70.

[0054] The head 71 of the tapping screw 70 may be smaller than the diameter of the fixing hole 50. In this case, the shaft 72 of the tapping screw 70 may be made thinner than that shown in the embodiment, so that part of the flat surface on the front of the closure plate 51 remains. Since the back surface of the head 71 of the tapping screw 70 abuts against the front surface of the closure plate 51, as long as the closure plate 51 is connected to the fixing hole 50 by the connecting portion 52, the fixing body 10 can be fixed to the fixing surface 100.

[0055] The number and arrangement of the fixing holes 50 can be changed in various ways. Also, the second fixing holes 60 do not have to be provided.

[0056] The fixed body 10 according to the embodiment is shipped or sold as a distribution box kit including the tapping screws 70 and the bolts 80, and therefore can also be described as follows: <Additional Notes> A fixed body device including a fixed body that can be fixed to a fixed surface with a screw, a fixing hole into which the shank of the screw can be inserted in a first direction; a closure plate connected to the fixing hole by a breakable connecting portion to close the fixing hole, the closure plate having a recess recessed toward the first direction; the screw capable of fixing the fixing body to the fixed surface; a bolt that can be inserted into the fixing hole after the closure plate has been removed. [Explanation of symbols]

[0057] Fixed body 10, bottom plate 41, fixing hole 50, closing plate 51, connecting portion 52, recess 53, second recess 54, partition wall 55, second fixing hole 60, second closing plate 61, connecting portion 62, third recess 63, tapping screw 70

Claims

1. A fixing body that can be fixed to a fixing surface with a screw, a fixing hole into which the shank of the screw can be inserted in a first direction; a closing plate connected to the inner surface of the fixing hole by a breakable connecting portion and capable of closing the fixing hole, The closure plate is provided with a recess recessed in the first direction, A fixed body having a rotation restraining means for restraining the rotation of the closure plate about the first direction.

2. The fixed body according to claim 1 , wherein the closure plate has a second recess formed on the side opposite to the recess, the second recess being recessed in a direction opposite to the first direction.

3. A fixing body that can be fixed to a fixing surface with a screw, a fixing hole into which the shank of the screw can be inserted in a first direction; a closing plate connected to the inner surface of the fixing hole by a breakable connecting portion and capable of closing the fixing hole, The closure plate has a recess recessed in the first direction and a second recess recessed in the opposite direction to the first direction on the side opposite to the recess.

4. 4. The fixture according to claim 1, wherein the recess is located at the center of the fixing hole.

5. The fixed body according to any one of claims 1 to 4, wherein the closure plate is capable of abutting against the fixed surface when fixed to the fixed surface.

6. 6. The stationary body according to claim 1, wherein the stationary body is box-shaped with a bottom, the fixing hole is formed in the bottom wall, and the recess is provided on the side of the internal space.

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