Ceiling substructure hanging hardware and ceiling structure

Abstract

To provide a ceiling backing hanger capable of adjusting a height while reducing a burden of upward work and preventing the looseness of a bolt.SOLUTION: A ceiling backing hanger 100 for supporting a ceiling backing material 210, includes: a first member 30 that supports the ceiling backing material 210; a second member 40 that is attached to a beam 10 of a building; bolts 5 that connect the first member 30 and the second member 40; and a loosening prevention member 50 that prevents the looseness of the bolts 5, wherein a head 5a of the bolt 5 is arranged opposite to the second member 40 with respect to the first member 30, and a relative position of the first member 30 with respect to the second member 40 can be changed by turning the bolt 5.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to ceiling base hangers and ceiling structures.

Background Art

[0002] A ceiling base material that supports a ceiling facing material is fixed to a beam via, for example, a hanger fixed to the beam. In Patent Document 1, a steel ceiling frame is formed by assembling a plurality of bar-shaped members, and a ceiling hanger that supports this steel ceiling frame is attached to the lower flange of a beam made of H-shaped steel. The ceiling hanger described in Patent Document 1 includes a hanging bracket that can be attached to a beam, a edge bracket that can be fitted into an edge forming the framework of the steel ceiling frame, a connecting bolt screwed into the hanging bracket, and a pair of nuts screwed onto this connecting bolt and sandwiching the edge bracket.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the ceiling hanger described in Patent Document 1, although the height position can be adjusted using a connecting bolt, it is necessary to tighten it by using a monkey wrench or the like, and there is a problem that the burden on the upward work of the operator is extremely large. Further, in the ceiling hanger described in Patent Document 1, a pair of nuts are provided so as to sandwich the edge bracket, and there is a problem that these nuts may loosen.

[0005] An object of the present invention is to provide a ceiling base hanger and a ceiling structure that can adjust the height while reducing the burden on the upward work of the operator and can prevent the bolts from loosening.

Means for Solving the Problems

[0006] To achieve the above objective, one embodiment of the ceiling substrate suspension hardware according to the present invention is: A ceiling framing hanger that supports the ceiling framing material, A first member that supports the ceiling base material, A second member that is attached to the beam of the building, A bolt connecting the aforementioned first member and the aforementioned second member, The bolt is equipped with a loosening prevention member to prevent loosening of the bolt, The head of the bolt is positioned on the opposite side of the first member from the second member. The relative position of the first member with respect to the second member changes by rotating the bolt.

[0007] In this embodiment, the bolt head is positioned on the opposite side of the second member from the first member, so that when the ceiling substrate hanger is attached to the building's beam, the bolt head is positioned below the first member. In this embodiment, the height of the first member can be adjusted by inserting the tip of an electric screwdriver from below the ceiling substrate hanger and turning the bolt, thereby changing the relative position of the first member with respect to the second member. Therefore, in this embodiment, the height of the first member can be adjusted while reducing the burden on the worker performing overhead work. Furthermore, in this embodiment, the bolt can be prevented from loosening by the anti-loosening member.

[0008] In another embodiment of the present invention, The second member is, A first piece attached to the beam, A through hole through which the bolt is inserted is formed, and a second piece is positioned closer to the first member than the first piece, It has a third piece connecting the first piece and the second piece, A nut is fixed to the side of the second piece opposite to the first member. The bolt inserted through the through-hole is screwed onto the nut, which is a characteristic feature of this arrangement.

[0009] According to this embodiment, the second piece of the second member is positioned at a distance from the first piece and close to the first member, thereby securing space for the bolt inserted through the insertion hole of the second piece to be displaced. This allows the bolt to be displaced relative to the second piece, thereby changing the relative position of the first member with respect to the second member, and thus adjusting the height of the first member.

[0010] In another embodiment of the present invention, The anti-loosening member is characterized by being a spring member positioned between the first member and the second member, and pressing the first member against the head of the bolt.

[0011] According to this embodiment, by using a spring member positioned between the first member and the second member to press the first member against the head of the bolt, the movement of the bolt head can be restrained, thereby preventing the bolt from loosening.

[0012] In another embodiment of the present invention, The aforementioned spring member is a compression coil spring, The bolt is characterized by being positioned so as to pass through a compression coil spring.

[0013] According to this embodiment, by using a compression coil spring arranged around the bolt to press the first member against the bolt head, the movement of the bolt head can be restrained, thereby preventing the bolt from loosening.

[0014] In another embodiment of the present invention, The spring member is a leaf spring that is bent into a U-shape and has an opening through which the bolt is inserted. The bolt is characterized in that it is positioned to pass through the opening of the leaf spring.

[0015] According to this embodiment, by using a U-shaped leaf spring positioned so as to allow the bolt to pass through, the first member is pressed against the head of the bolt, thereby restricting the movement of the bolt head and preventing the bolt from loosening.

[0016] One aspect of the ceiling structure according to the present invention is a ceiling surface material, a ceiling base material that supports the ceiling surface material, a ceiling base hanger that supports the ceiling base material and is attached to a beam of a building, the ceiling base hanger includes a first member that supports the ceiling base material, a second member attached to the beam, a bolt that connects the first member and the second member, a loosening prevention member that prevents loosening of the bolt, the head of the bolt is disposed on the side opposite to the second member with respect to the first member, by turning the bolt, the height position of the first member changes.

[0017] According to this aspect, when the ceiling base hanger is attached to the beam of the building, the head of the bolt is disposed below the first member. In this aspect, by inserting the tip of an electric driver from below the ceiling base hanger and turning the bolt, the relative position of the first member with respect to the second member can be changed to adjust the height of the first member. Therefore, in this aspect, the height of the first member can be adjusted while reducing the burden of upward work for the operator. Further, according to this aspect, loosening of the bolt can be prevented by the loosening prevention member.

Effect of the Invention

[0018] As can be understood from the above description, according to the ceiling base hanger and the ceiling structure, height adjustment is possible while reducing the burden of upward work for the operator, and loosening of the bolt can be prevented.

Brief Description of the Drawings

[0019] [Figure 1] It is a perspective view showing an example of a ceiling structure according to the first embodiment. [Figure 2] It is a front view showing an example of a ceiling base hanger according to the first embodiment. [Figure 3] This is a perspective view showing an example of a ceiling substrate suspension fitting according to the first embodiment. [Figure 4] This is a plan view showing the ceiling base panel. [Figure 5] This is a cross-sectional view showing the ceiling base panel. [Figure 6] This is a perspective view showing an example of ceiling substrate suspension hardware according to the second embodiment. [Modes for carrying out the invention]

[0020] The ceiling substrate suspension hardware and ceiling structure according to the embodiment will be described below with reference to the attached drawings. In this specification and drawings, substantially identical components may be denoted by the same reference numerals to avoid redundant explanations.

[0021] [Ceiling structure equipped with ceiling base suspension hardware according to the first embodiment] First, an example of a ceiling structure equipped with ceiling substrate suspension hardware according to the first embodiment will be described with reference to Figures 1 to 5. Here, Figure 1 is a perspective view showing an example of a ceiling structure according to the first embodiment. Figure 2 is a front view showing an example of ceiling substrate suspension hardware according to the first embodiment. Figure 3 is a perspective view showing an example of ceiling substrate suspension hardware according to the first embodiment. In each figure, arrows indicating the X-axis, Y-axis, and Z-axis directions, which are three mutually orthogonal directions, may be shown as appropriate. The X-axis and Y-axis directions are along the horizontal direction. The Z-axis direction is along the vertical direction.

[0022] The building frame having the ceiling structure 200 shown in Figure 1 comprises columns and beams 10. The columns may be, for example, steel-framed (S-frame) columns. The columns are not limited to steel-framed (S-frame) columns, but may also be reinforced concrete (RC-frame) or steel-reinforced concrete (SRC-frame) columns.

[0023] Beam 10 is, for example, a steel beam (steel frame beam). Beam 10 extends in the Y-axis direction. Beam 10 includes a main beam 10A and a secondary beam 10B. Both ends of the main beam 10A are connected to a pair of columns. Both ends of the secondary beam 10B are connected to a pair of main beams 10A. Figure 1 shows the main beam 10A extending in the Y-axis direction and the secondary beam 10B extending in the X-axis direction. When the main beam 10A and secondary beam 10B are not distinguished, they are referred to as beam 10.

[0024] The beam 10 is made of, for example, an H-shaped steel and has a web 11, an upper flange 12, and a lower flange 13.

[0025] The ceiling structure 200 comprises gypsum board 2, a ceiling base panel frame 210 that supports the gypsum board 2, and ceiling base suspension fittings 100 that support the ceiling base panel frame 210 and are attached to the beam 10. The gypsum board 2 is an example of a ceiling surface material. The ceiling surface material is not limited to gypsum board, and may be a plate-shaped member made of other materials.

[0026] <Ceiling base panel frame> Next, the ceiling base panel frame 210 will be described with reference to Figures 4 and 5. Figure 4 is a plan view showing the ceiling base panel. Figure 5 is a cross-sectional view showing the ceiling base panel.

[0027] The ceiling base panel frame 210 is a grid-like ceiling base having a pair of main members 211, a plurality of connecting members 212 that connect the main members 211 to each other, and connecting auxiliary members 213 that connect the connecting members 212 to each other at intermediate positions between the pair of main members 211. As shown in Figure 4 as an example, the ceiling base panel frame 210 is assembled in a grid pattern using these members, and the overall dimensions are, for example, 1P (assuming a module width of 910 mm) × 2P, with each grid having dimensions of, for example, 0.5P × 0.5P. The ceiling base panel frame 210 is assembled in the manner shown in Figure 4 at the factory, transported to the site, and installed as is. The length in the longitudinal direction may be set to 3P, 4P, etc.

[0028] The main member 211, the connecting member 212, and the connecting auxiliary member 213 are all formed by bending steel materials such as light steel. As shown in Figure 5, the main member 211 has a main body piece 211a with a roughly grooved cross-section and a lip 211c, and the web of the main body piece 211a is provided with an engaging piece 211b that protrudes outward in a Z shape.

[0029] The connecting support member 213 has a roughly grooved cross-sectional shape with a lip 213a. Similarly, the connecting member 212 also has a roughly grooved cross-sectional shape with a lip, just like the connecting support member 213. The main member 211, the connecting member 212, and the connecting support member 213 are assembled to each other by nails, screws, welding, riveting, etc.

[0030] One or two layers of gypsum board 2 are attached to the underside of the ceiling base panel frame 210 using self-tapping screws with drills, etc., to form the ceiling panel. As will be explained in detail below, the installation of the gypsum board 2 is done after the ceiling base panel frame 210 is suspended from the beam 10 via the ceiling base suspension hardware 100. The installation of the ceiling panel is then completed by attaching wallpaper to the underside of the gypsum board 2. In addition, sound-absorbing material such as rock wool is placed on-site above the ceiling base panel frame 210.

[0031] In addition to the light steel ceiling base panel frame shown in the illustration, the ceiling base panel frame 210 may also be a wooden ceiling base panel frame formed by assembling wooden battens in a grid pattern. The ceiling base panel frame 210 is an example of a ceiling base material. The ceiling base panel frame may also be constructed by assembling other bar-shaped members such as ceiling joists and ceiling joist hangers.

[0032] <Ceiling underlayment hanging hardware> Next, the ceiling base suspension hardware 100 will be described with reference to Figures 2 and 3. The ceiling base suspension hardware 100 comprises a first member 30 that supports the ceiling base panel frame 210, a second member 40 that is attached to the beam 10, a bolt 5 that connects the first member 30 and the second member 40, and a loosening prevention member 50 that prevents the bolt 5 from loosening.

[0033] <First component> The first member 30 includes a base 32 and two support pieces 70 that hang downward from the base 32 and support the ceiling base panel frame 210. The base 32 and the support pieces 70 are made of metal. The base 32 and the support pieces 70 may also be made of a hard resin.

[0034] The base 32 has a rectangular horizontal piece 34 in plan view, and bent pieces 35 formed by bending at the left and right ends of the horizontal piece 34. In addition, the base 32 is provided with ribs 36 that protrude upward from the horizontal piece 34 in order to increase the rigidity of the horizontal piece 34.

[0035] A U-shaped piece 37 is fixed to the center of the lower surface of the horizontal piece 34, with its opening facing downwards. The U-shaped piece 37 is fixed to the horizontal piece 34, for example, by crimping. The U-shaped piece 37 may also be welded to the horizontal piece 34, or fixed by other means.

[0036] The U-shaped piece 37 has a pair of hanging pieces 37a and a connecting piece 37b that connects the upper ends of the pair of hanging pieces 37a. The U-shaped piece 37 is formed, for example, by bending. The connecting piece 37b is bent from both ends of the pair of hanging pieces 37a and protrudes downward. The thickness direction of the connecting piece 37b is aligned with the thickness direction of the horizontal piece 34. Through holes are formed in the connecting piece 37b and the horizontal piece 34 through which bolts 5 are inserted.

[0037] Each pair of hanging pieces 37a has an engaging claw 37c that engages with the lip 211c of the main material 211 of the ceiling base panel frame 210. Between the pair of hanging pieces 37a, there is space for the head 5a of a bolt 5 to be placed and for the tip of an electric screwdriver to be inserted.

[0038] The support piece 70 has a rising portion 72 extending diagonally vertically, a locking end 73 formed by bending at the upper end of the rising portion 72, and an engaging portion 74 formed in a figure-seven shape by bending at the lower end of the rising portion 72. The locking end 73 is locked to the bent piece 35 from above, and both are fixed via a crimping portion, thereby fixing the support piece 70 in a hanging position relative to the horizontal piece 34. As shown in the figure, the engaging portions 74 of the left and right support pieces 70 protrude inward (towards the U-shaped piece 37) of the ceiling base suspension hardware 100.

[0039] <Second component> The second member 40 has a pair of first pieces 42 attached to the beam 10, a second piece 44 positioned closer to the first member 30 than the first pieces 42, and a pair of third pieces 46 connecting the first pieces 42 and the second pieces 44. The second member 40 has, for example, an inverted hat shape. The second member 40 can be formed, for example, by bending a strip-shaped plate made of a metal material.

[0040] The thickness direction of the first piece 42 and the second piece 44 is aligned with the thickness direction of the lower flange 13 of the beam 10. The thickness direction of the third piece 46 is intersecting with the thickness direction of the first piece 42 and the second piece 44. The first piece 42 and the third piece 46 are provided on both sides of the second piece 44, respectively. The third piece 46 is bent from both ends of the second piece 44 and protrudes upward. The first piece 42 is bent from the upper end of the third piece 46 and protrudes to the opposite side from the second piece 44. The left and right first pieces 42 are bent in opposite directions from the upper end of the third piece 46.

[0041] The second piece 44 has a through hole through which a bolt 5 is inserted. The through hole penetrates the second piece 44 in the direction of its thickness. A nut 7 is fixed to the upper surface of the second piece 44. The nut 7 is fixed to the second piece 44, for example, by welding. The nut 7 is positioned in a location corresponding to the through hole through which the bolt 5 is inserted. A predetermined space is formed above the second piece 44 and between the pair of third pieces 46.

[0042] The first piece 42 has a through hole through which a bolt 8 is inserted. The bolt 8 is used to fix the ceiling base hanger 100 to the beam 10. The lower flange 13 of the beam 10, to which the ceiling base hanger 100 is attached, also has a through hole through which a bolt 8 is inserted. The first piece 42 is fixed to the lower flange 13 by the bolt 8 and nut 9. In this way, the ceiling base hanger 100 is bolted to the beam 10. Note that there may be multiple bolts 8 for fixing the ceiling base hanger 100, or there may be just one. For example, a through hole may be formed in one of the left and right first pieces 42, through which a bolt 8 is inserted, and the ceiling base hanger 100 may be attached to the beam 10.

[0043] <Bolts connecting the first and second members> The bolt 5 connects the first member 30 and the second member 40. The bolt 5 is positioned to pass through the connecting piece 37b of the U-shaped piece 37, the horizontal piece 34 of the first member 30, and the second piece 44 of the second member 40. The bolt 5 is inserted from below. The head 5a of the bolt 5 is inside the opening of the U-shaped piece 37 and is positioned below the connecting piece 37b. The head 5a of the bolt 5 abuts against the lower surface of the connecting piece 37b. Note that other parts (such as a washer) may be sandwiched between the head 5a of the bolt 5 and the first member 30.

[0044] The bolt 5 is screwed into the nut 7 located on the upper surface of the second piece 44 of the second member 40. By turning the bolt 5, the head 5a of the bolt 5 moves upward, and the first member 30 is displaced upward. By loosening the bolt 5, the head 5a of the bolt 5 moves downward, and the first member 30 is displaced downward. This allows the first member 30 to be moved relative to the second member 40. In this way, the position of the first member 30 can be adjusted using the bolt 5.

[0045] <Loosening prevention component> Next, the anti-loosening member 50 will be described. The anti-loosening member 50 is, for example, a compression coil spring 52. The compression coil spring 52 is positioned between the first member 30 and the second member 40. Specifically, it is positioned between the horizontal piece 34 of the first member 30 and the second piece 44 of the second member 40. The compression coil spring 52 is positioned to surround the bolt 5. In other words, the bolt 5 is positioned to pass through the compression coil spring 52. The compression coil spring 52 presses the first member 30 downward. The compression coil spring 52 presses the first member 30 away from the second member 40. As the compression coil spring 52 presses the second member 40, the horizontal piece 34 (and connecting piece 37b) is pressed against the head 5a of the bolt 5. Therefore, the movement of the head 5a of the bolt 5 is restrained, and the rotation of the bolt 5 is prevented. The compression coil spring 52 can be used to prevent the bolt 5 from loosening.

[0046] <Installation of ceiling support hardware to beams> As described above, the ceiling base suspension fitting 100 is attached to the lower flange 13 of the beam 10. The second member 40 is positioned so that its upper surface abuts against the lower surface of the lower flange 13. The second member 40 is fixed to the beam 10 using bolts 8 and nuts 9. When the ceiling base suspension fitting 100 is fixed to the beam 10, the bolt 5 extends in the Z-axis direction, and the compression coil spring 52 presses the first member 30 against the head 5a of the bolt 5.

[0047] (Effects and benefits of ceiling underlayment suspension hardware) According to the ceiling substrate hanging hardware 100 of the first embodiment, the head 5a of the bolt 5 is positioned on the opposite side of the first member 30 from the second member 40, so that when the ceiling substrate hanging hardware 100 is attached to the beam 10 of the building, the head 5a of the bolt 5 is positioned below the first member 30. With the ceiling substrate hanging hardware 100, the height of the first member 30 can be adjusted by inserting the tip of an electric screwdriver from below the ceiling substrate hanging hardware 100 and turning the bolt 5, thereby changing the relative position of the first member 30 with respect to the second member 40. Therefore, in this embodiment, the height of the first member 30 can be adjusted while reducing the burden on the worker performing overhead work. Furthermore, according to this embodiment, the loosening of the bolt 5 can be prevented by the compression coil spring 52. With the ceiling substrate hanging hardware 100, by preventing the loosening of the bolt 5, the increase in the workload required to prevent the loosening of the bolt 5 can be suppressed.

[0048] Furthermore, in the ceiling substrate suspension hardware 100, the second piece 44 of the second member 40 is positioned at a distance from the first piece 42 and closer to the first member 30. When the ceiling substrate suspension hardware 100 is attached to the beam 10, the second piece 44 is positioned lower than the first piece 42, which ensures that there is space for the bolt 5 to be displaced between the lower flange 13 of the beam 10 and the second piece 44. This allows the bolt 5 to be displaced relative to the second piece 44, thereby changing the relative position of the first member 30 with respect to the second member 40 and adjusting the height of the first member 30.

[0049] In the ceiling substrate suspension hardware 100, a compression coil spring 52 is placed between the first member 30 and the second member 40 to press the first member 30 against the head 5a of the bolt 5, thereby restraining the movement of the head 5a of the bolt 5 and preventing the bolt 5 from loosening.

[0050] According to the ceiling structure 200 equipped with ceiling base suspension hardware 100, the ceiling base panel frame 210 that supports the gypsum board 2 can be attached to the beam 10 via the ceiling base suspension hardware 100. With the ceiling structure 200 equipped with ceiling base suspension hardware 100, the worker can easily adjust the height of the gypsum board 2 by turning the bolt 5 with an electric screwdriver. The compression coil spring 52 presses the first member 30 against the head 5a of the bolt 5, preventing the bolt 5 from rotating and thus preventing the bolt 5 from loosening. As a result, the workload of tightening the bolt 5 as a measure to prevent the bolt 5 from loosening is reduced.

[0051] [Ceiling substrate suspension hardware according to the second embodiment] Next, with reference to Figure 6, the ceiling substrate suspension fitting 100B according to the second embodiment will be described. Figure 6 is a perspective view showing an example of the ceiling substrate suspension fitting according to the second embodiment. The difference between the ceiling substrate suspension fitting 100B according to the second embodiment and the ceiling substrate suspension fitting 100 according to the first embodiment is that the anti-loosening member 50, which consists of a compression coil spring 52, is replaced with an anti-loosening member 50B consisting of a U-shaped leaf spring 54. Note that in the description of the second embodiment, the same explanation as in the first embodiment will be omitted.

[0052] The U-shaped leaf spring 54 can be formed, for example, by bending a metal plate into a U-shape. The U-shaped leaf spring 54 includes a pair of protruding portions facing each other in the thickness direction of the plate, and a curved portion connecting the pair of protruding portions.

[0053] The pair of protruding portions have through holes formed for inserting bolts 5. The bolts 5 are positioned to pass through the pair of protruding portions. The thickness direction of the pair of protruding portions is aligned with the Z-axis direction. The pair of protruding portions protrude so as to intersect with the bolts 5.

[0054] One of the pair of protruding portions abuts against the upper surface of the horizontal piece 34 of the first member 30, and the other of the pair of protruding portions abuts against the lower surface of the second piece 44 of the second member 40. As a result, the U-shaped leaf spring 54 can press the first member 30 against the head 5a of the bolt 5.

[0055] The ceiling substrate suspension hardware 100B according to this second embodiment also provides the same effects and advantages as the first embodiment.

[0056] According to the ceiling base suspension hardware 100B, by using a U-shaped leaf spring 54 positioned so that the bolt 5 is inserted, the first member 30 is pressed against the head 5a of the bolt 5, thereby restraining the movement of the head 5a of the bolt 5 and preventing the bolt 5 from loosening.

[0057] Furthermore, other embodiments may be used in which other components are combined with the configurations listed in the above embodiments, and the present invention is not limited in any way to the configurations shown herein. In this regard, modifications can be made without departing from the spirit of the present invention, and can be appropriately determined according to the application form.

[0058] (modified version) Next, a modified example of a ceiling substrate suspension fitting will be described. In the above embodiment, the case in which the anti-loosening member 50 is placed between the first member 30 and the second member 40 has been described, but the anti-loosening member 50 is not limited to being placed between the first member 30 and the second member 40, and may be placed, for example, between the first member 30 and the head 5a of the bolt 5.

[0059] Furthermore, although the above embodiment describes the case in which a spring member is used as the anti-loosening member 50, the anti-loosening member 50 is not limited to a spring member, and may be a restraining member such as a clip that restrains the movement of the head 5a of the bolt 5. For example, the clip may be placed over the head 5a of the bolt 5, and the tip of the clip may be inserted into the insertion hole of the first member 30 and fixed in place. This restrains the movement of the head 5a of the bolt 5 and prevents the bolt 5 from loosening. [Explanation of symbols]

[0060] 100,100B: Ceiling substructure hanging hardware 200: Ceiling structure 2: Gypsum board (ceiling material) 5: Bolt 5a: Bolt head 7: Nut 8: Bolt 9: Nut 10: Beam 11: Web 12: Upper flange 13: Lower flange 30: First component 32: Pedestal 34:Horizontal piece 35: Folding piece 36: Rib 37: U-shaped piece 37a: Hanging piece 37b: Connecting piece 37c: Engagement claw 40: Second component 42: 1st piece 44:Second piece 46: 3rd piece 50, 50B: Anti-loosening member 52: Compression coil spring 54: Leaf spring 70: Support piece 72: Standing section 210: Ceiling base panel frame (ceiling base material) 211:Main material 211a: Main body piece 211b: Engagement piece 211c: Lip 212: Connecting material 213: Connecting support material

Claims

1. A ceiling framing hanger that supports the ceiling framing material, A first member that supports the ceiling base material, A second member that is attached to the beam of the building, A bolt that connects the first member and the second member by being inserted through a through hole formed in the first member and screwed onto a nut fixed to the second member, The bolt is equipped with a loosening prevention member to prevent loosening of the bolt, The head of the bolt is positioned on the opposite side of the first member from the second member. A ceiling substrate suspension fitting characterized in that the relative position of the first member with respect to the second member changes by rotating the bolt.

2. The second member is, A first piece attached to the beam, A through hole through which the bolt is inserted is formed, and a second piece is positioned closer to the first member than the first piece, It has a third piece connecting the first piece and the second piece, The nut is fixed to the side of the second piece opposite to the first member. The ceiling base suspension hardware according to claim 1, characterized in that the bolt inserted through the through hole is screwed onto the nut.

3. A ceiling base suspension fitting for supporting ceiling base material, A first member that supports the ceiling base material, A second member that is attached to the beam of the building, A bolt connecting the first member and the second member, The bolt is equipped with a loosening prevention member to prevent loosening of the bolt, The anti-loosening member is a spring member positioned between the first member and the second member, which presses the first member against the head of the bolt. The head of the bolt is positioned on the opposite side of the first member from the second member. A ceiling substrate suspension fitting characterized in that the relative position of the first member with respect to the second member changes by rotating the bolt.

4. The aforementioned spring member is a compression coil spring, The ceiling base suspension hardware according to claim 3, characterized in that the bolt is arranged so as to pass through the compression coil spring.

5. The spring member is a leaf spring that is bent into a U-shape and has an opening through which the bolt is inserted. The ceiling base suspension hardware according to claim 3, characterized in that the bolt is arranged to pass through the opening of the leaf spring.

6. Ceiling material and A ceiling base material that supports the aforementioned ceiling surface material, The ceiling base material is supported by a ceiling base suspension fitting attached to the beam of the building, The aforementioned ceiling substrate hanging hardware is A first member that supports the ceiling base material, A second member attached to the aforementioned beam, A bolt that connects the first member and the second member by being inserted through a through hole formed in the first member and screwed onto a nut fixed to the second member, It has a loosening prevention member that prevents the bolt from loosening, The head of the bolt is positioned on the opposite side of the first member from the second member. A ceiling structure characterized in that the height position of the first member changes by rotating the bolt.

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