Fixing tool

Abstract

To fix a first rod member easily and fix a fixing member to the first rod member securely.SOLUTION: A fixing tool includes: a fixing member (21) fixed to a first rod member (12); and a movable member (22) rotatably attached to the fixing member (21). The fixing member (21) includes a plate part (24), a first flange part (25), a second flange part (26), and a rod member insertion part (27). The rod member insertion part (27) includes an opening part (30), a first engagement part (31) provided at the first flange part (25), and a second engagement part (32) provided at the second flange part (26). The movable member (22) may open or close the opening part (30) by rotating through a rotary shaft (23). In a state that the movable member (22) covers the opening part (30), the first rod member (12) is sandwiched between the first and second engagement parts (31, 32) and the movable member (22).SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a fastener for fastening a second rod-shaped member to a first rod-shaped member. [Background technology]

[0002] There is known a fastener for fixing a brace material (second rod-shaped member) to a hanging bolt (first rod-shaped member), which includes a fixed member fixed to the hanging bolt and a movable member rotatably attached to the fixed member and to which the second rod-shaped member is fixed (see, for example, Patent Document 1). In the structure of Patent Document 1, the hanging bolt is sandwiched between an engagement portion provided on the side of the plate-shaped fixed member and the movable member, so that the fixed member can be easily fixed to the hanging bolt. In addition, the movable member rotates around a rotation axis provided on the side of the fixed member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2012-12887 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the fixture of Patent Document 1, the fixing member on which the engagement portion is provided is plate-shaped, and the rigidity of the fixing member is easily reduced, and it is considered that the fixing member is deformed by an external force. In particular, when a bending force acts in the surface direction of the fixing member around the rotation axis, the fixing member is easily deformed. Increasing the plate thickness of the fixing member can improve the rigidity, but the weight increases.

[0005] In view of these points, an object of the present invention is to provide a fixing device that can clamp a first rod-shaped member between a fixed member and a movable member to easily fix the first rod-shaped member, while suppressing deformation of the fixed member and firmly fixing the fixed member to the first rod-shaped member. [Means for solving the problem]

[0006] The present invention provides a fastener for fastening a second rod-shaped member to a first rod-shaped member, the fastener comprising: a fastening member fixed to the first rod-shaped member; and a movable member rotatably attached to the fastening member and to which the second rod-shaped member is fastened, the fastening member comprising a plate portion extending in an axial direction of the first rod-shaped member, a first flange portion extending from one end of the plate portion, a second flange portion extending from the other end of the plate portion, and a rod-shaped member insertion portion through which the first rod-shaped member is inserted, the rod-shaped member insertion portion being disposed in the rod-shaped member insertion portion. the movable member is provided with an opening that exposes the first rod-shaped member in the surface direction of the plate portion, a first engagement portion that is provided on the first flange portion and engages with the first rod-shaped member, and a second engagement portion that is provided on the second flange portion and engages with the first rod-shaped member, the movable member is capable of rotating about a rotation axis provided on the plate portion to open and close the opening, and when the movable member covers the opening, the first rod-shaped member is a fixing device that is clamped between the first engagement portion and the second engagement portion and the movable member.

[0007] The present invention also provides a fixture fixed to a rod-shaped member, comprising: a fixing member that engages with the rod-shaped member; and a cover member that is attached to the fixing member and that holds the rod-shaped member between the fixing member and the cover member. The fixing member comprises a plate portion extending in the axial direction of the rod-shaped member, a first flange portion extending from the plate portion, a second flange portion extending from the plate portion at a position spaced apart from the first flange portion in the axial direction of the rod-shaped member, and a rod-shaped member insertion portion through which the rod-shaped member is inserted. The fixing device comprises an opening formed by cutting out the plate portion along a rod-shaped member, a first receiving portion formed by cutting out the first flange portion concavely from the plate portion side, and a second receiving portion formed by cutting out the second flange portion concavely from the plate portion side, and a female threaded portion is formed on the edge of the opening to sandwich the rod-shaped member from both radially outer sides, and the rod-shaped member sandwiched between the fixing member and the cover member abuts against the first receiving portion and the second receiving portion, and the threaded portion on the outer periphery of the rod-shaped member engages with the female threaded portion. Effect of the Invention

[0008] According to the fixing device of the present invention, the first rod-shaped member is clamped between the fixed member and the movable member, thereby easily fixing the first rod-shaped member, while suppressing deformation of the fixed member and firmly fixing the fixed member to the first rod-shaped member. [Brief description of the drawings]

[0009] [Figure 1] 1 is a side view showing a structure of a ceiling in which a fastener according to a first embodiment is used. [Diagram 2] FIG. 13 is a perspective view showing a state in which the fixture is fixed to the hanging bolt. [Diagram 3] FIG. [Figure 4A] FIG. 4 is a plan view of the fixing member as viewed from above. [Figure 4B] FIG. [Diagram 5] 6 is a diagram showing an engagement state between a first flange portion and a threaded portion. FIG. [Figure 6] 11A and 11B are diagrams illustrating the mounting angle of the movable member with respect to the hanging bolt. [Figure 7] FIG. 11 is a side view showing a structure of a ceiling in which a second fixing device is used in the second embodiment. [Figure 8] FIG. 13 is a front view of the second fixture. [Figure 9] FIG. 13 is a diagram illustrating a modified example of the second embodiment. [Figure 10] FIG. 13 is a side view showing a ceiling structure in which a third fixing device is used in the third embodiment. [Figure 11] FIG. 13 is an exploded perspective view of the third fixture. [Figure 12A] FIG. 13 is a perspective view of a third fixture. [Figure 12B] FIG. 13 is a perspective view of a third fixture. [Figure 13A] FIG. 13 is a perspective view showing a fixing member in a fourth embodiment. [Figure 13B] FIG. 13 is a diagram illustrating a first modified example of the fourth embodiment. [Figure 13C] FIG. 13 is a diagram illustrating a second modified example of the fourth embodiment. [Figure 14] FIG. 13 is a perspective view showing a fixing member in the fifth embodiment. [Figure 15] FIG. 13 is a front view showing a fixing device according to a sixth embodiment. [Figure 16] FIG. [Figure 17] FIG. 4 is a front view showing the fixture fixed to the hanging bolt. [Figure 18] FIG. 13 is a rear view showing the fixture fixed to the hanging bolt. [Figure 19] FIG. 2 is a plan view of the fixture fixed to the hanging bolt as viewed from above. [Figure 20] FIG. 4 is a side view of the fixture fixed to the hanging bolt. [Figure 21] FIG. 13 is a front view showing a fixing device according to a seventh embodiment. [Figure 22] FIG. [Diagram 23] FIG. 4 is a front view showing the fixture fixed to the hanging bolt. [Figure 24] FIG. 13 is a rear view showing the fixture fixed to the hanging bolt. [Diagram 25] FIG. 2 is a plan view of the fixture fixed to the hanging bolt as viewed from above. [Figure 26] FIG. 4 is a side view of the fixture fixed to the hanging bolt. [Figure 27] FIG. 23 is a front view showing a fixing device according to an eighth embodiment. [Figure 28] FIG. 13 is a front view showing a ceiling structure in which a fixing device according to a ninth embodiment is used. [Figure 29] FIG. [Diagram 30] FIG. 4 is a front view showing the fixture fixed to the hanging bolt. [Diagram 31] FIG. 2 is a perspective view showing the fixture fixed to the hanging bolt. [Diagram 32]FIG. 17 is a front view showing a structure of a ceiling in which a fastener according to a tenth embodiment is used. [Diagram 33] FIG. 4 is a perspective view of the fixture as seen from below. [Diagram 34] FIG. 2 is a view of the fixture as viewed in the axial direction of the base material. [Diagram 35] FIG. 23 is a side view of a ceiling structure in which a fastener according to an eleventh embodiment is used. [Diagram 36] FIG. [Figure 37] FIG. 23 is a front view showing the fastener fixed to the suspension bolt in the twelfth embodiment. [Figure 38] FIG. [Figure 39] FIG. 2 is a plan view of the fixture fixed to the hanging bolt as viewed from above. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of a fastener according to the present invention will be described with reference to the drawings. [First embodiment] FIG. 1 is a side view showing the structure of a ceiling in which a fixture 10 according to a first embodiment of the present invention is used. A hanging bolt 12 (first rod-shaped member) is provided on the ceiling slab 11. A plurality of hanging bolts 12 are provided at predetermined intervals. The hanging bolts 12 are rod-shaped and extend vertically downward from the lower surface of the ceiling slab 11.

[0011] A rod-shaped soffit support 13 extending horizontally is supported by a hanger 14 provided at the lower end of the hanging bolt 12. In Fig. 1, a pair of hanging bolts 12 are connected in the left-right direction (horizontal direction) by the soffit support 13 via the hanger 14. In this specification and the like, the up-down direction coincides with the axial direction of the suspension bolt 12. A rod-shaped joist (not shown) extending horizontally is provided on the underside of the joist support 13. A ceiling board (not shown) made of gypsum board or the like is attached to the underside of the joist and is perpendicular to the axial direction of the hanging bolt 12.

[0012] In order to improve the strength of the ceiling, the hanging bolts 12 are connected to the joist support 13 by rod-shaped brace materials 15 (second rod-shaped members). The brace material 15 extends diagonally downward from the upper end of the hanging bolt 12 and is connected to the sill support 13 near another adjacent hanging bolt 12. The upper end of the brace material 15 is fixed to the upper end of the hanging bolt 12 by the fastener 10. That is, the fastener 10 fastens the brace material 15 to the hanging bolt 12.

[0013] Fig. 2 is a perspective view showing a state in which the fastener 10 is fixed to the hanging bolt 12. Fig. 3 is a perspective view showing the fastener 10. 2 and 3, the fixing device 10 comprises a fixed member 21 fixed to the hanging bolt 12, a movable member 22 rotatably attached to the fixed member 21, and a rotating shaft 23 that supports the movable member 22 on the fixed member 21 so as to be rotatable.

[0014] Fig. 4A is a plan view of the fixing member 21 as viewed from above. Fig. 4B is a front view of the fixing member 21. 2 to 4B, fixing member 21 includes a plate portion 24 extending in the axial direction of hanging bolt 12 parallel to hanging bolt 12, a first flange portion 25 extending from one end (upper end) of plate portion 24, a second flange portion 26 extending from the other end (lower end) of plate portion 24, and a rod-shaped member insertion portion 27 through which hanging bolt 12 is inserted.

[0015] The plate portion 24 is a generally rectangular flat plate when viewed from the front perpendicular to the axis 12a of the hanging bolt 12 (see FIG. 4B). The plate portion 24 has an outer surface 24a (plate surface of the plate portion) that comes into contact with the movable member 22. The movable member 22 rotates on the outer surface 24a. The plate portion 24 is provided with a rotation shaft fixing hole 24b into which the rotation shaft 23 is inserted.

[0016] The first flange portion 25 and the second flange portion 26 extend in a direction substantially perpendicular to the plate portion 24, in a direction opposite to the outer surface 24a. The rotating shaft 23 is fixed in the rotating shaft fixing hole 24b. The rotating shaft 23 extends from the outer surface 24a in the opposite direction to the direction in which the first flange portion 25 extends.

[0017] The rod-shaped member insertion portion 27 has an opening 30 that exposes the hanging bolt 12 arranged in the rod-shaped member insertion portion 27 in the surface direction of the plate portion 24, a first engagement portion 31 provided on the first flange portion 25, and a second engagement portion 32 provided on the second flange portion 26.

[0018] The opening 30 is a vertically long opening that continues from the upper end to the lower end of the plate portion 24 along the hanging bolt 12. The opening 30 is disposed offset to one side with respect to the center in the width direction (left-right direction) of the fixing member 21. Here, in this specification, the left-right direction, which coincides with the width direction of the fixed member 21, is a direction perpendicular to the axis 12a and the axial direction of the rotating shaft 23, and the depth direction of the fixed member 21 is the axial direction of the rotating shaft 23.

[0019] The first engagement portion 31 is a recess formed by cutting out the first flange portion 25 so as to fit along the outer periphery of the hanging bolt 12. The first engagement portion 31 is formed in a substantially semicircular arc shape that fits along the outer periphery of the hanging bolt 12. The first engagement portion 31 communicates with the upper end of the opening 30.

[0020] The second engagement portion 32 is a recess formed by cutting out the second flange portion 26 so as to fit along the outer periphery of the hanging bolt 12. The second engagement portion 32 is formed in a substantially semicircular arc shape that fits along the outer periphery of the hanging bolt 12. The second engagement portion 32 communicates with the lower end of the opening 30.

[0021] The first flange portion 25 and the second flange portion 26 face each other and are arranged parallel to each other. The first flange portion 25 and the second flange portion 26 have the same extension length from the plate portion 24. That is, the first flange portion 25 and the second flange portion 26 have the same length in the depth direction of the fixing member 21. The above-mentioned extension lengths of the first flange portion 25 and the second flange portion 26 can be changed as necessary, and for example, may be formed to be longer than in the state shown in FIG.

[0022] 4B, when viewed in a direction perpendicular to the outer surface 24a of the plate portion 24, the first flange portion 25 and the second flange portion 26 are disposed at an inclination angle θ with respect to an orthogonal line R perpendicular to the axis 12a of the hanging bolt 12. In other words, the first flange portion 25 and the second flange portion 26 are inclined by the inclination angle θ with respect to the horizontal direction.

[0023] The first engagement portion 31 provided on the first flange portion 25 is parallel to the first flange portion 25 and is disposed at an inclination angle θ with respect to the orthogonal line R. The second engagement portion 32 provided on the second flange portion 26 is parallel to the second flange portion 26 and is disposed at an inclination angle θ with respect to the orthogonal line R.

[0024] FIG. 5 is a diagram showing the state in which the first flange portion 25 and the threaded portion 12b are engaged with each other. 4B and 5, the distance D between the first engagement portion 31 and the second engagement portion 32 is an integer multiple of the pitch P (see FIG. 5) of the threaded portion 12b of the hanging bolt 12. Therefore, both the first engagement portion 31 and the second engagement portion 32 can be appropriately engaged with the threaded portion 12b. Here, the distance D is the distance between the first engagement portion 31 and the second engagement portion 32 in the axial direction of the axis 12a.

[0025] 4A to 5, the first engagement portion 31 is provided by cutting out the first flange portion 25 in a semicircular shape in a range of approximately 180° from the plate portion 24 side. The shape of the first engagement portion 31 corresponds to the shape of a circular female thread portion that can be screwed into the threaded portion 12b of the hanging bolt 12, cut out in a semicircular shape. The first engagement portion 31 is formed so as to taper toward the tip side, similar to a general triangular screw. The thickness of the first engagement portion 31 is smaller than the plate thickness of the first flange portion 25.

[0026] When viewed in the axial direction of the hanging bolt 12, the first engagement portion 31 has one end 33 in an arc shape and the other end 34 spaced 180° from the one end 33 in the circumferential direction. The one end 33 has a one-end contact surface 33a that contacts the threaded portion 12b in the axial direction of the suspension bolt 12. The one-end contact surface 33a is located on the upper surface of the one end 33. The other end 34 has a other-end abutment surface 34a that abuts against the threaded portion 12b in the axial direction of the hanging bolt 12. The other-end abutment surface 34a is located on the lower surface of the other end 34. The other end 34 abuts against the threaded portion 12b on the side opposite to the one-end abutment surface 33a in the axial direction of the hanging bolt 12.

[0027] The threaded portion 12b of the hanging bolt 12 has a lead angle L. The lead angle L is the angle of the threaded portion 12b with respect to the orthogonal line R. The inclination angle θ is set to be slightly larger than the lead angle L with respect to the orthogonal line R.

[0028] The thickness of the first engagement portion 31 is smaller than the groove width of the thread of the thread portion 12b so that the first engagement portion 31 can be screwed into the thread portion 12b. Therefore, a gap exists in the axial direction of the hanging bolt 12 between the first engagement portion 31 and the groove of the thread of the thread portion 12b. In this embodiment, the inclination angle θ is set to an angle larger than the lead angle L so that both the one end contact surface 33a and the other end contact surface 34a contact the threaded portion 12b at the same time. Therefore, the first engagement portion 31 can firmly engage with the threaded portion 12b over a wide range in the circumferential direction from the one end side contact surface 33a to the other end side contact surface 34a.

[0029] The shape of the second engagement portion 32 is the same as that of the first engagement portion 31. That is, as shown in Fig. 4B, the second engagement portion 32 has one end 33, the other end 34, a one-end abutment surface 33a, and an other-end abutment surface 34a, and both the one-end abutment surface 33a and the other-end abutment surface 34a abut against the threaded portion 12b at the same time, similar to the first engagement portion 31. The thickness of the second engagement portion 32 is smaller than the plate thickness of the second flange portion 26.

[0030] 2 to 4B, fixing member 21 has a first rib 35 extending from the end of first flange portion 25 opposite plate portion 24 toward second flange portion 26, and a second rib 36 extending from the end of second flange portion 26 opposite plate portion 24 toward first flange portion 25. The first rib 35 extends substantially perpendicular to the first flange portion 25. The second rib 36 extends substantially perpendicular to the second flange portion .

[0031] The fixing member 21 also has an inner wall portion 37 that extends from the edge of the opening 30 toward the inside of the rod-shaped member insertion portion 27 along the outer periphery of the hanging bolt 12. The inner wall portion 37 extends from the edge of the opening 30 on the side where the rotating shaft 23 is provided. The inner wall portion 37 extends approximately perpendicular to the plate portion 24. The inner wall portion 37 is located between the first rib 35 and the second rib 36 in the up-down direction.

[0032] For the fixing member 21, a single plate material is subjected to processes such as punching and bending, and the plate portion 24, the first flange portion 25, the second flange portion 26, the rod-shaped member insertion portion 27, the first rib 35, the second rib 36, and the inner wall portion 37 are integrally formed. Therefore, the fixing member 21 can be easily formed.

[0033] 2 and 3, the movable member 22 is formed to be longer in the up-down direction than the fixed member 21. The movable member 22 includes a rotating plate portion 41 facing the outer surface 24a of the plate portion 24, and a pair of side ribs 42 erected from both end edges of the rotating plate portion 41 in the width direction (short side direction). The side rib 42 stands upright from the rotating plate portion 41 toward the opposite side to the outer surface 24a.

[0034] The upper part of the movable member 22 is a contact part 43 that rotates while being in contact with the outer surface 24a. The movable member 22 includes an attachment part 44 below the contact part 43. The attachment part 44 extends outward from the fixed member 21 relative to the contact part 43. The brace material 15 is attached to the mounting portion 44. A plurality of fixing holes 44a are provided in the mounting portion 44 of the rotating plate portion 41. The brace material 15 is fastened to the mounting portion 44 by fastening members 45 (see FIG. 1) that are inserted into the fixing holes 44a.

[0035] The rotating shaft 23 is inserted into the rotating plate portion 41 of the abutment portion 43. The movable member 22 is freely rotatable about the rotating shaft 23. The rotating shaft 23 is disposed offset in the width direction of the fixed member 21 with respect to the rod-shaped member insertion portion 27. Furthermore, within the movable member 22, the rotating shaft 23 is disposed offset toward the rod-shaped member insertion portion 27 in the width direction of the movable member 22. The movable member 22 is attached to the rotating shaft 23 by crimping the end 23a of the rotating shaft 23 after the rotating shaft 23 is inserted into the rotating plate portion 41. The movable member 22 is sandwiched between the end 23a and the outer surface 24a in the axial direction of the rotating shaft 23.

[0036] A cutout portion 43a is provided at the end of the abutting portion 43 opposite the attachment portion 44 so that the abutting portion 43 becomes smaller in the longitudinal direction. The cutout portion 43a is provided at the upper end of the abutting portion 43. In detail, the cutout portion 43a is formed by cutting out the upper end portion of the abutment portion 43 obliquely so that the upper edge of the abutment portion 43 becomes lower as it moves away from the rod-shaped member insertion portion 27 side in the width direction of the fixed member 21.

[0037] Fig. 6 is a diagram showing the mounting angle of the movable member 22 with respect to the hanging bolt 12. In Fig. 6, mounting angles of 0°, 30°, and 85° are shown in that order from the left side of the page. In Fig. 6, the brace material 15 is shown when the mounting angle is 0°, but the brace material 15 is omitted when the mounting angle is 30° and 85°.

[0038] Here, an example of a procedure for attaching the brace material 15 to the hanging bolt 12 using the fastener 10 will be described. First, the brace material 15 is fixed to the movable member 22 by the fastening member 45 . 3 and 6, the movable member 22 is set so that the angle between the axis 12a of the hanging bolt 12 and the movable member 22 is approximately 0°. In this state, when viewed in the axial direction of the rotating shaft 23, the movable member 22 does not overlap the opening 30, the first engaging portion 31, and the second engaging portion 32, and the opening 30, the first engaging portion 31, and the second engaging portion 32 are exposed to the outside. In other words, the opening 30 is open to the outside.

[0039] Next, the worker engages the rod-shaped member insertion portion 27 with the threaded portion 12b of the hanging bolt 12 from a direction perpendicular to the axis 12a through the opening 30. Here, the worker can engage the rod-shaped member insertion portion 27 with the hanging bolt 12 at any position in the up-down direction. Next, the worker rotates the movable member 22 via the brace material 15. When the installation angle of the movable member 22 is 30°, the abutment portion 43 of the movable member 22 overlaps with the upper part of the opening 30 and closes a part of the opening 30. In this state, the suspension bolt 12 is sandwiched between the abutment portion 43 and the first engagement portion 31 and the second engagement portion 32. In this manner, the fixing device 10 can be easily fixed to the suspension bolt 12 by simply setting the rod-shaped member insertion portion 27 on the suspension bolt 12 via the opening 30 and then rotating the movable member 22. Therefore, even when the fixing device 10 is attached to the suspension bolt 12 while looking up at the ceiling from below, the installation work is easy.

[0040] The first flange portion 25 and the second flange portion 26 erected from the plate portion 24 function as reinforcing ribs for the plate portion 24. This increases the rigidity of the fixing member 21, and even if a bending force acts in the planar direction of the plate portion 24 around the pivot shaft 23 due to an earthquake or the like, deformation of the fixing member 21 can be effectively suppressed, thereby increasing the strength of the ceiling.

[0041] When viewed in the axial direction of the hanging bolt 12, the distance between the bottom of the first engagement portion 31 and the abutment portion 43 is set to be smaller than the outer diameter of the threaded portion 12b. Similarly, the distance between the bottom of the second engagement portion 32 and the abutment portion 43 is set to be smaller than the outer diameter of the threaded portion 12b. Therefore, the hanging bolt 12 can be strongly pressed against the first engagement portion 31 and the second engagement portion 32 by the movable member 22.

[0042] The worker can change the mounting angle of the movable member 22 as desired, for example, between 30° and 90°, depending on various conditions such as the length of the hanging bolt 12. When the mounting angle of the movable member 22 is 85°, the contact portion 43 of the movable member 22 overlaps with the upper and lower portions of the opening 30, closing a portion of the opening 30. In this state, the hanging bolt 12 is clamped between the first engagement portion 31, the second engagement portion 32 and the contact portion 43.

[0043] Since the notch 43a is provided at the upper end of the abutment portion 43, a large distance can be secured in the vertical direction between the lower surface of the ceiling slab 11 and the abutment portion 43. This makes it possible to prevent contact between the movable member 22 and the lower surface of the ceiling slab 11, and ensures a large mounting angle of the movable member 22.

[0044] As described above, according to the first embodiment to which the present invention is applied, fastener 10 fastens brace material 15 to hanging bolt 12, and includes fixing member 21 fixed to hanging bolt 12, and movable member 22 rotatably attached to fixing member 21 and to which brace material 15 is fixed. Fixing member 21 includes plate portion 24 extending in the axial direction of hanging bolt 12, first flange portion 25 extending from one end of plate portion 24, second flange portion 26 extending from the other end of plate portion 24, and rod-shaped member insertion portion 27 through which hanging bolt 12 is inserted. The rod-shaped member insertion portion 27 includes an opening 30 that exposes the hanging bolt 12 arranged in the rod-shaped member insertion portion 27 in the surface direction of the plate portion 24, a first engagement portion 31 provided on the first flange portion 25 and engaging with the hanging bolt 12, and a second engagement portion 32 provided on the second flange portion 26 and engaging with the hanging bolt 12. The movable member 22 can rotate about a rotation shaft 23 provided on the plate portion 24 to open and close the opening 30, and when the movable member 22 covers the opening 30, the hanging bolt 12 is sandwiched between the movable member 22 and the first engagement portion 31 and the second engagement portion 32. According to this configuration, the first flange portion 25 extending from one end of the plate portion 24 and the second flange portion 26 extending from the other end of the plate portion 24 function as reinforcing ribs for the plate portion 24, thereby increasing the rigidity of the fixed member 21 and suppressing deformation of the fixed member 21 due to external forces. Therefore, the fixed member 21 can be firmly fixed to the hanging bolt 12. When the movable member 22 rotates to cover the opening 30, the hanging bolt 12 is sandwiched between the movable member 22 and the first and second engaging portions 31 and 32, so that the fixed member 21 can be easily fixed.

[0045] In addition, the hanging bolt 12 is a bolt, the first engagement portion 31 and the second engagement portion 32 are arc-shaped recesses along the outer periphery of the hanging bolt 12, and the distance D between the first engagement portion 31 and the second engagement portion 32 is an integer multiple of the pitch P of the threaded portion 12b of the hanging bolt 12. According to this configuration, by recessing the first flange portion 25 and the second flange portion 26, which function as reinforcing ribs, in an arc shape, the first engagement portion 31 and the second engagement portion 32 can be provided with a simple structure by utilizing the first flange portion 25 and the second flange portion 26. Furthermore, since the distance D between the first engagement portion 31 and the second engagement portion 32 is an integer multiple of the pitch P of the threaded portion 12b of the hanging bolt 12, the first engagement portion 31 and the second engagement portion 32 appropriately engage with the threaded portion 12b. Therefore, the fixing member 21 can be firmly fixed to the hanging bolt 12.

[0046] In addition, when viewed in a direction perpendicular to the outer surface 24a, which is the plate surface of the plate portion 24, the first flange portion 25 and the second flange portion 26 are arranged at an inclination angle θ with respect to an orthogonal line R perpendicular to the axis 12a of the hanging bolt 12, and the inclination angle θ is set in accordance with the lead angle L of the screw portion 12b. According to this configuration, since the first flange portion 25 and the second flange portion 26 are inclined in accordance with the lead angle L of the thread portion 12b, it is not necessary to greatly incline the first engagement portion 31 and the second engagement portion 32 in accordance with the lead angle L. Therefore, the first engagement portion 31 can be easily formed on the first flange portion 25, and the second engagement portion 32 can be easily formed on the second flange portion 26. Here, the inclination angle θ is set within a range of ±3° with respect to the lead angle L of the thread portion 12b. The range of ±3° is set so that the circumferential lengths of the first engagement portion 31 and the second engagement portion 32 can be sufficiently secured.

[0047] Furthermore, the first engagement portion 31 and the second engagement portion 32 each have one end 33 and the other end 34 in their arc shapes, the one end 33 has a one-end abutment surface 33a that abuts against the threaded portion 12b in the axial direction of the hanging bolt 12, and the other end 34 has an other-end abutment surface 34a that abuts against the threaded portion 12b on the opposite side to the one-end abutment surface 33a in the axial direction of the hanging bolt 12, and the inclination angle θ is set to an angle at which both the one-end abutment surface 33a and the other-end abutment surface 34a abut against the threaded portion 12b at the same time. According to this configuration, the first engagement portion 31 and the second engagement portion 32 simultaneously abut against the threaded portion 12b at both the one-end abutment surface 33a and the other-end abutment surface 34a, so that the first engagement portion 31 and the second engagement portion 32 can be firmly engaged with the hanging bolt 12. Here, when the inclination angle θ is set to an angle larger than the lead angle L, it is easy to bring both the one end contact surface 33a and the other end contact surface 34a into contact with the threaded portion 12b at the same time. When a force acts in the opposite direction to the state in which the one-end contact surface 33a and the other-end contact surface 34a are in contact with the threaded portion 12b, both the one-end contact surface 33b and the other-end contact surface 34b shown in Fig. 5 come into contact with the threaded portion 12b at the same time. This allows the first engaging portion 31 and the second engaging portion 32 to be firmly engaged with the hanging bolt 12.

[0048] In addition, a first rib 35 is provided extending from the end of the first flange portion 25 opposite the plate portion 24 toward the second flange portion 26, and a second rib 36 is provided extending from the end of the second flange portion 26 opposite the plate portion 24 toward the first flange portion 25. According to this configuration, the first rib 35 functions as a reinforcing rib for the first flange portion 25, and the second rib 36 functions as a reinforcing rib for the second flange portion 26. This makes it possible to effectively increase the rigidity of the fixing member 21. Note that it is sufficient that at least one of the first rib 35 and the second rib 36 is provided.

[0049] The fixing member 21 also includes an inner wall portion 37 that extends from the edge of the opening 30 along the outer periphery of the suspension bolt 12 toward the inside of the rod-shaped member insertion portion 27 . According to this configuration, the inner wall portion 37 functions as a reinforcing rib for the plate portion 24. This effectively increases the rigidity of the fixing member 21. Also, the inner wall portion 37 that fits along the outer periphery of the hanging bolt 12 can guide the hanging bolt 12 to the rod-shaped member insertion portion 27, making it easy to install the hanging bolt 12 in the rod-shaped member insertion portion 27.

[0050] In addition, the movable member 22 has an abutment portion 43 that rotates while in abutment against the fixed member 21, and an attachment portion 44 that extends outside the fixed member 21 from the abutment portion 43 and to which the brace material 15 is attached, and a cutout portion 43a is provided at the end of the abutment portion 43 opposite the attachment portion 44 so that the abutment portion 43 becomes smaller in the longitudinal direction. According to this configuration, the cutout portion 43a reduces the length of the contact portion 43 of the movable member 22, thereby preventing the movable member 22 from interfering with surrounding members. This allows the movable member 22 to have a large rotation range.

[0051] [Second embodiment] A second embodiment to which the present invention is applied will be described below with reference to Fig. 7. In this second embodiment, parts configured similarly to the first embodiment are given the same reference numerals and descriptions thereof will be omitted. The second embodiment differs from the first embodiment in that two second rod-shaped members are fixed to a second fixture 210.

[0052] FIG. 7 is a side view showing the structure of a ceiling in which second fixture 210 (fixture) is used in the second embodiment. The hanging bolts 212a, 212b, and 212c are rod-shaped and extend vertically downward from the lower surface of the ceiling slab 11. The sill support 13 is supported by hangers 14 provided at the lower ends of the hanging bolts 212a, 212b, and 212c, respectively.

[0053] The central suspension bolt 212b located between one of the left and right suspension bolts 212a and the other of the left and right suspension bolts 212c is connected to the suspension bolts 212a by a rod-shaped upper brace material 215a (second rod-shaped member). Furthermore, the central hanging bolt 212b is connected to the joist support 13 by a rod-shaped lower brace material 215b (a second rod-shaped member).

[0054] A second fixture 210 (fixing device) is fixed to the vertical middle portion of the hanging bolt 212b. The upper brace material 215 a extends diagonally downward from the upper end of the hanging bolt 212 a and is fixed to the second fastener 210 . The lower brace material 215b extends diagonally downward from the second fastener 210 and is connected to the siding support 13 near the hanging bolt 212c. That is, the second fastener 210 is a fastener that fastens the upper brace material 215a and the lower brace material 215b, which serve as second rod-shaped members, to the suspension bolt 212b, which serves as the first rod-shaped member.

[0055] FIG. 8 is a front view of second fixture 210. The second fixing device 210 includes a fixed member 21, a rotating shaft 23, and a movable member 222 that is attached to the fixed member 21 so as to be capable of rotating. The upper brace material 215a and the lower brace material 215b are fixed to the movable member 222. The movable member 222 is attached to the fixed member 21 via a rotation shaft 23, and is rotatable about the rotation shaft 23. The movable member 222 rotates on the outer surface 24a of the fixed member 21.

[0056] The movable member 222 has a rod shape that extends linearly in the vertical direction. The movable member 222 includes an upper attachment portion 244a that extends upward relative to the fixed member 21, and a lower attachment portion 244b that extends downward relative to the fixed member 21.

[0057] The upper end of the upper brace material 215a is fixed to the upper end of the hanging bolt 212a by a fastener 10. The lower end of the upper brace material 215 a is fixed to the upper mounting portion 244 a of the movable member 222 .

[0058] The upper end of the lower brace material 215b is fixed to the lower mounting portion 244b of the movable member 222. The lower end of the lower brace material 215b is fixed to the siding support 13.

[0059] The second fastener 210 is set on the outer periphery of the hanging bolt 212b through the opening 30 of the fixing member 21. Next, when the movable member 222 is rotated, the movable member 222 overlaps with the opening 30, and a part of the opening 30 is closed by the movable member 222. In this state, the hanging bolt 212b is sandwiched between the movable member 222 and the first engaging portion 31 and the second engaging portion 32.

[0060] FIG. 9 is a diagram illustrating a modification of the second embodiment. FIG. 9 shows a movable member 252 formed in an L-shape. The movable member 252 is attached to the fixed member 21 via the rotation shaft 23, and is rotatable about the rotation shaft 23. The movable member 252 rotates on the outer surface 24a of the fixed member 21.

[0061] The movable member 252 includes an upper attachment portion 264a extending upward relative to the fixed member 21, and a lower attachment portion 264b extending downward relative to the fixed member 21. When viewed in the axial direction of the rotation shaft 23, the lower attachment portion 264b extends from the lower end of the rod-shaped upper attachment portion 264a at a right angle to the upper attachment portion 264a, thereby forming the movable member 252 in an L-shape.

[0062] 7 and 9, the lower end of the upper brace material 215a can be fixed to the upper mounting portion 264a, and the upper end of the upper brace material 215a can be fixed to the upper end of the hanging bolt 212c by the fastener 10. In addition, the upper end of the lower brace material 215b can be fixed to the lower mounting portion 264b, and the lower end of the lower brace material 215b can be fixed to the siding support 13 near the hanging bolt 212c. The hanging bolt 212b is clamped between the first engaging portion 31 and the second engaging portion 32 and the movable member 252.

[0063] [Third embodiment] A third embodiment to which the present invention is applied will be described below with reference to Figures 10 to 12B. In this third embodiment, parts configured similarly to the first embodiment are given the same reference numerals and descriptions thereof will be omitted. The third embodiment differs from the first embodiment in that the fixed member 21 is inverted and used as a movable member.

[0064] FIG. 10 is a side view showing the structure of a ceiling in which third fasteners 310a to 310e (fasteners) are used in the third embodiment. The pair of hanging bolts 312a, 312b are rod-shaped and extend vertically downward from the lower surface of the ceiling slab 11. The lower ends of the hanging bolts 312a and 312b are provided with hangers 14. Equipment 360 to be placed above the ceiling is attached to the hanging bolts 312a and 312b via the hangers 14.

[0065] One hanging bolt 312a and the other hanging bolt 312b are connected to each other by a rod-shaped first brace material 315a and a rod-shaped second brace material 315b. The first brace material 315a and the second brace material 315b are fully threaded bolts having a threaded portion formed over their entire length. The first brace material 315a extends obliquely downward from the upper end of the hanging bolt 312a and is connected to the lower end of the hanging bolt 312b. The upper end of the first brace material 315a is fixed to the upper end of the hanging bolt 312a via the third fastener 310a. The lower end of the first brace material 315a is fixed to the lower end of the hanging bolt 312b via the third fastener 310b.

[0066] The second brace material 315b extends obliquely downward from the upper end of the hanging bolt 312b and is connected to the lower end of the hanging bolt 312a. The upper end of the second brace material 315b is fixed to the upper end of the hanging bolt 312b via the third fastener 310c. The lower end of the second brace material 315b is fixed to the lower end of the hanging bolt 312a via the third fastener 310d.

[0067] The first brace material 315a and the second brace material 315b are substantially perpendicular to each other at a midpoint between the hanging bolts 312a and 312b. At an orthogonal portion 370 where the first brace material 315a and the second brace material 315b are substantially perpendicular to each other, the first brace material 315a and the second brace material 315b are fixed by a third fastener 310e. The five third fasteners 310a to 310e shown in FIG. 5 are identical parts.

[0068] Fig. 11 is an exploded perspective view of third fastener 310a. Fig. 12A is a perspective view of third fastener 310a. Third fasteners 310a to 310e have the same shape, so third fastener 310a will be described as a representative. The third fixing device 310a includes a fixed member 21, a rotating shaft 23, and a movable member 322 that is attached to the fixed member 21 so as to be capable of rotating.

[0069] The movable member 322 is a component having the same shape as the fixed member 21. The movable member 322 is disposed so that the outer surface 24a of the movable member 322 abuts against the outer surface 24a of the fixed member 21, and is fixed to the fixed member 21 by the rotation shaft .

[0070] As shown in FIG. 12A, when rod-shaped member insertion portion 27 of fixed member 21 and rod-shaped member insertion portion 27 of movable member 322 are parallel to each other, the mounting angle of movable member 322 with respect to fixed member 21 is 0°. In this state, the rod-shaped member insertion portion 27 of the fixed member 21 and the rod-shaped member insertion portion 27 of the movable member 322 are open on the outer surface 24a side. In the state shown in Figure 12A, an operator can engage the rod-shaped member insertion portion 27 of the fixed member 21 with the upper end of the hanging bolt 312a, and can engage the upper end of the first brace material 315a with the rod-shaped member insertion portion 27 of the movable member 322.

[0071] Next, as shown in FIG. 10, when the movable member 322 is rotated, for example, 45° in the third fixing device 310a, a portion of the opening 30 in the fixed member 21 is closed by the movable member 322, and a portion of the opening 30 in the movable member 322 is also blocked by the fixed member 21. In this state, the upper end of the hanging bolt 312a is sandwiched between the first engagement portion 31 and the second engagement portion 32 of the fixed member 21 and the movable member 322. In addition, the upper end of the first brace material 315a is sandwiched between the first engagement portion 31 and the second engagement portion 32 of the movable member 322 and the fixed member 21. In the third fixing device 310a, the fixed member 21 is fixed to a hanging bolt 312a as a first rod-shaped member, and a first brace material 315a as a second rod-shaped member is fixed to the movable member 322. In addition, FIG. 10 illustrates a structure in which third fixing devices 310b, 310c, 310d, and 310e are used in addition to the third fixing device 310a. However, FIG. 10 is merely a conceptual diagram, and fixing may be performed using other fixing methods instead of the third fixing devices 310b, 310c, 310d, and 310e, for example.

[0072] In the third fixing device 310e provided at the orthogonal portion 370 in Figure 10, when the above-mentioned installation angle is 0°, the rod-shaped member insertion portion 27 (see Figure 12A) of the fixed member 21 engages with the upper and lower middle portions of the second brace material 315b, and the rod-shaped member insertion portion 27 (see Figure 12A) of the movable member 322 engages with the upper and lower middle portions of the first brace material 315a.

[0073] FIG. 12B is a perspective view of third fixture 310e. Next, as shown in FIG. 12B, when the movable member 322 is rotated approximately 90 degrees in the third fixing device 310e, a portion of the opening 30 of the fixed member 21 is closed by the movable member 322, and a portion of the opening 30 of the movable member 322 is also blocked by the fixed member 21. In this state, the second brace material 315b is sandwiched between the first engagement portion 31 and the second engagement portion 32 of the fixed member 21 and the movable member 322. In addition, the first brace material 315a is sandwiched between the first engagement portion 31 and the second engagement portion 32 of the movable member 322 and the fixed member 21. In the third fixing tool 310e, the fixed member 21 is fixed to a second brace material 315b serving as a first rod-shaped member, and the movable member 322 is fixed to a first brace material 315a serving as a second rod-shaped member. Note that FIG. 10 illustrates a structure in which third fixing devices 310a, 310b, 310c, and 310d are used for fixing in addition to third fixing device 310e; however, FIG. 10 is merely a conceptual diagram, and fixing may be performed using other fixing methods, for example, instead of third fixing devices 310a, 310b, 310c, and 310d.

[0074] [Fourth embodiment] A fourth embodiment to which the present invention is applied will be described below with reference to Figures 13A to 13C. In this fourth embodiment, parts configured similarly to the first embodiment are given the same reference numerals and descriptions thereof will be omitted. In the fourth embodiment, a fixing member having a different shape from fixing member 21 is shown.

[0075] FIG. 13A is a perspective view showing a fixing member 421 in the fourth embodiment. The fixing member 421 comprises a wall portion 461 extending from the end of the first flange portion 25 opposite the plate portion 24 in the opposite direction to the second flange portion 26, and a third flange portion 462 extending from the tip of the wall portion 461 in the axial direction of the rotating shaft 23. The third flange portion 462 faces the first flange portion 25 and is parallel to the first flange portion 25 . The third flange portion 462 is provided with a third engagement portion 463. The third engagement portion 463 has the same shape as the first engagement portion 31 and the second engagement portion 32, and is disposed in a coaxial positional relationship with the first engagement portion 31 and the second engagement portion 32.

[0076] 2 and 13A, when the fixed member 421 is used instead of the fixed member 21, the suspension bolt 12 is sandwiched between the first engagement portion 31, the second engagement portion 32, and the third engagement portion 463 and the abutment portion 43 of the movable member 22. Note that the movable member 22 may be extended in accordance with the size of the fixed member 421.

[0077] FIG. 13B is a diagram illustrating a first modified example of the fourth embodiment. The fixing member 471 has a shape in which two fixing members 21 are arranged side by side in the axial direction of the hanging bolt 12 and these two fixing members 21 are connected in the axial direction of the hanging bolt 12 by a wall portion 472 . It should be noted that the fixing member 471 does not include the first rib 35 and the second rib 36.

[0078] The fixing member 471 has two pairs of a first engaging portion 31 and a second engaging portion 32 provided in the axial direction of the hanging bolt 12 . 2 and 13B, when a fixing member 471 is used instead of the fixing member 21, the hanging bolt 12 is clamped between the two first engagement portions 31 and the two second engagement portions 32 and the abutment portion 43 of the movable member 22.

[0079] FIG. 13C illustrates a second modified example of the fourth embodiment. In addition to the third flange portion 462, the fixing member 481 includes a wall portion 482 extending from the end of the second flange portion 26 opposite the plate portion 24 in the opposite direction to the first flange portion 25, and a fourth flange portion 483 extending from the tip of the wall portion 482 in the axial direction of the rotating shaft 23.

[0080] The fourth flange portion 483 faces the second flange portion 26 and is parallel to the second flange portion 26 . The fourth flange portion 483 is provided with a fourth engagement portion 484. The fourth engagement portion 484 has the same shape as the first engagement portion 31 to the third engagement portion 463, and is disposed in a coaxial positional relationship with the first engagement portion 31 to the third engagement portion 463.

[0081] 2 and 13C, when the fixing member 481 is used instead of the fixing member 21, the hanging bolt 12 is sandwiched between the first engaging portion 31, the second engaging portion 32, the third engaging portion 463, and the fourth engaging portion 484 and the abutting portion 43 of the movable member 22. By providing the engaging portions from the first engaging portion 31 to the fourth engaging portion 484 in this manner, the force acting on these engaging portions can be dispersed and the hanging bolt 12 can be firmly supported.

[0082] [Fifth embodiment] A fifth embodiment to which the present invention is applied will be described below with reference to Fig. 14. In the fifth embodiment, parts configured similarly to the first embodiment are given the same reference numerals and descriptions thereof will be omitted. In the present fifth embodiment, a fixing member having a different shape from fixing member 21 is shown.

[0083] FIG. 14 is a perspective view showing a fixing member 521 in the fifth embodiment. A protrusion 580 is provided on the outer surface (upper surface) of the first flange portion 25 of the fixing member 521. The protrusion 580 is provided linearly along the outer periphery of the first engaging portion 31. In detail, the protrusion portion 580 includes first protrusions 580a extending in the depth direction of the fixing member 521 on both sides in the width direction of the first engagement portion 31, and second protrusions 580b connecting the pair of first protrusions 580a in the width direction of the fixing member 521. The rigidity of the fixing member 521 is increased by the protrusion 580. In addition, a protrusion (not shown) similar to the protrusion 580 is provided on the second flange portion 26 along the outer periphery of the second engaging portion 32.

[0084] [Sixth embodiment] A sixth embodiment to which the present invention is applied will be described below with reference to Figures 15 to 20. In this sixth embodiment, parts configured similarly to the first embodiment are given the same reference numerals and descriptions thereof will be omitted.

[0085] FIG. 15 is a front view showing a fixture 610 according to the sixth embodiment. 1 and 15, a fixture 610 is fixed to a hanging bolt 12 (a rod-shaped member) in place of the fixture 10 shown in FIG. The fixture 610 is attached to the upper end of the hanging bolt 12. A rod-shaped brace material 15 is attached to the fixture 610. The upper end of the brace material 15 is connected to the fixing device 610. The brace material 15 extends diagonally downward from the fixing device 610 and is connected to the joist support 13.

[0086] Fig. 16 is an exploded perspective view of the fixture 610. Fig. 17 is a front view showing the fixture 610 in a state where it is fixed to the hanging bolt 12. Fig. 18 is a rear view showing the fixture 610 in a state where it is fixed to the hanging bolt 12. Fig. 19 is a plan view showing the fixture 610 in a state where it is fixed to the hanging bolt 12, as viewed from above. Fig. 20 is a side view showing the fixture 610 in a state where it is fixed to the hanging bolt 12, as viewed from the side.

[0087] 15 to 20, fixture 610 includes a fixing member 621 that engages with suspension bolt 12, a cover member 622 that is rotatably attached to fixing member 621, and a rotating shaft 623 that supports cover member 622 on fixing member 621 so as to be rotatable. The fixture 610 is fixed to the suspension bolt 12 by clamping the suspension bolt 12 between a fixing member 621 and a cover member 622 .

[0088] 16 and 20, the fixing member 621 is configured by attaching an inner fixing member 660 disposed inside the outer fixing member 650 to an outer fixing member 650 with which the cover member 622 abuts. The outer fixing member 650 corresponds to what was described as the fixing member 21 in the first embodiment, but in the present sixth embodiment, it will be described as the outer fixing member 650. Detailed structures of the outer fixing member 650 and the inner fixing member 660 will be described later, and first the fixing member 621 will be described.

[0089] The fixing member 621 comprises a plate portion 624 extending in the axial direction of the hanging bolt 12 parallel to the hanging bolt 12, a first flange portion 625 extending from one end (upper end) of the plate portion 624, a second flange portion 626 extending from the other end (lower end) of the plate portion 624, and a rod-shaped member insertion portion 627 through which the hanging bolt 12 is inserted.

[0090] The plate portion 624 is a substantially rectangular flat plate when viewed from the front perpendicular to the axis 12a of the hanging bolt 12 (see FIG. 17). The outer surface of the plate portion 624 in the plate thickness direction is a cover receiving surface 624a that receives the cover member 622. The cover member 622 rotates on the cover receiving surface 624a. The plate portion 624 is provided with a rotation shaft fixing hole 624b into which the rotation shaft 623 is inserted, and a fixing hole 624c penetrating the plate portion 624 in the plate thickness direction.

[0091] The first flange portion 625 and the second flange portion 626 extend in a direction substantially perpendicular to the plate portion 624, in a direction opposite to the cover receiving surface 624a side. The rotating shaft 623 is fixed in the rotating shaft fixing hole 624b. The rotating shaft 623 extends from the cover receiving surface 624a in the opposite direction to the direction in which the first flange portion 625 extends.

[0092] The first flange portion 625 and the second flange portion 626 face each other and are arranged parallel to each other. Furthermore, the first flange portion 625 and the second flange portion 626 extend from the plate portion 624 by the same length.

[0093] 17 and 18, when viewed in a direction perpendicular to the cover receiving surface 624a of the plate portion 624, the first flange portion 625 and the second flange portion 626 are disposed at an inclination angle θ with respect to an orthogonal line R (FIG. 17) perpendicular to the axis 12a of the suspension bolt 12. That is, the first flange portion 625 and the second flange portion 626 are inclined by the inclination angle θ with respect to the horizontal direction.

[0094] The rod-shaped member insertion portion 627 includes an opening 630 formed by cutting out the plate portion 624 along the hanging bolt 12 arranged in the rod-shaped member insertion portion 627, a first receiving portion 631 formed by cutting out the first flange portion 625 in a concave shape from the plate portion 624 side, and a second receiving portion 632 formed by cutting out the second flange portion 626 in a concave shape from the plate portion 624 side.

[0095] The opening 630 is a vertically long opening that continues from the upper end to the lower end of the plate portion 624 along the hanging bolt 12. The opening 630 is disposed offset to one side with respect to the center in the width direction (left-right direction) of the fixing member 621. Here, the up-down direction of the fixture 610 coincides with the axial direction of the hanging bolt 12. The left-right direction, which coincides with the width direction of the fixing member 621, is a direction perpendicular to the axis 12a and the axial direction of the rotating shaft 623, and the front-rear direction of the fixing member 621 is the axial direction of the rotating shaft 623.

[0096] 15 and 17, the opening 630 has a pair of edges that sandwich the hanging bolt 12 from both radially outer sides in a front view as shown in Fig. 17, and a female thread portion 630a that sandwiches the hanging bolt 12 from both radially outer sides is formed on these edges. The female thread portion 630a is formed by forming a plurality of protrusions functioning as threads on the edge of the opening 630 in the axial direction of the hanging bolt 12 at the same pitch as the pitch P (see Fig. 5) of the hanging bolt 12. The width of the female thread portion 630a is slightly larger than the diameter of the hanging bolt 12. The hanging bolt 12 has a threaded portion 12b formed on the outer periphery over the entire length of the hanging bolt 12. When the hanging bolt 12 is placed in the rod-shaped member insertion portion 627, the female threaded portion 630a engages with the threaded portion 12b. The female thread portion 630a extends in the axial direction of the hanging bolt 12 between the first receiving portion 631 and the second receiving portion 632.

[0097] 15, 16 and 19, the first receiving portion 631 is a recess formed by cutting out the first flange portion 625 so as to fit along the outer periphery of the hanging bolt 12. The first receiving portion 631 communicates with the upper end of the opening 630. The first receiving portion 631 provided on the first flange portion 625 is parallel to the first flange portion 625 and is disposed at an inclination angle θ with respect to the orthogonal line R (FIG. 17). Further, the second receiving portion 632 is a recess formed by cutting out the second flange portion 626 so as to fit along the outer periphery of the hanging bolt 12. The second receiving portion 632 communicates with the lower end of the opening 630. The second receiving portion 632 provided on the second flange portion 626 is parallel to the second flange portion 626 and is disposed at an inclination angle θ with respect to the orthogonal line R (FIG. 17). When the hanging bolt 12 is placed in the rod-shaped member insertion portion 627 , the first receiving portion 631 and the second receiving portion 632 come into contact with the threaded portion 12 b of the hanging bolt 12 to receive the hanging bolt 12 .

[0098] 15 to 20, the outer fixing member 650 of the fixing member 621 comprises an outer plate portion 651 having a cover receiving surface 624a, a first outer flange portion 652 extending from one end (upper end portion) of the outer plate portion 651, and a second outer flange portion 653 extending from the other end (lower end portion) of the outer plate portion 651. The outer fixing member 650 also has an outer opening 654 formed by cutting out the outer plate portion 651 along the hanging bolt 12, a first engagement portion 655 formed by cutting out the first outer flange portion 652 in a concave shape from the outer plate portion 651 side, and a second engagement portion 656 formed by cutting out the second outer flange portion 653 in a concave shape from the outer plate portion 651 side.

[0099] The inner fixing member 660 of the fixing member 621 comprises an inner plate portion 661 attached to the inner surface of the outer plate portion 651, a first inner flange portion 662 extending from one end (upper end portion) of the inner plate portion 661, and a second inner flange portion 663 extending from the other end (lower end portion) of the inner plate portion 661. The inner fixing member 660 also has an inner opening 664 formed by cutting out the inner plate portion 661 along the hanging bolt 12, a first notch portion 665 formed by cutting out the first inner flange portion 662 in a concave shape from the inner plate portion 661 side, and a second notch portion 666 formed by cutting out the second inner flange portion 663 in a concave shape from the inner plate portion 661 side. The inner opening 664 has a pair of edges that sandwich the hanging bolt 12 from both radially outer sides, and a female thread portion 630a is formed on these edges.

[0100] The inner fixing member 660 is formed so that its vertical length is smaller than that of the outer fixing member 650 , and is housed between the first outer flange portion 652 and the second outer flange portion 653 . The inner plate portion 661 and the outer plate portion 651 are generally rectangular plates when viewed from the front, and are provided parallel to each other. The inner fixing member 660 is fixed to the outer fixing member 650 by attaching the inner plate portion 661 to the inner surface of the outer plate portion 651.

[0101] The plate portion 624 of the fixing member 621 is composed of an outer plate portion 651 and an inner plate portion 661 . The opening 630 of the plate portion 624 is composed of an outer opening 654 and an inner opening 664. The outer opening 654 overlaps with the inner opening 664 from the front side. When viewed from the front, the left and right width of the outer opening 654 is formed larger than the left and right width of the inner opening 664, and the female thread portion 630a protrudes inward of the opening 630 from the left and right edges 654a of the outer opening 654. The female thread portion 630a is exposed forward from the outer opening 654 (FIG. 15).

[0102] The first flange portion 625 of the fixing member 621 is composed of a first outer flange portion 652 and a first inner flange portion 662. The first inner flange portion 662 is disposed so as to overlap the first outer flange portion 652 from below, and extends parallel to the first outer flange portion 652. The first inner flange portion 662 is disposed so as to be spaced apart downward from the first outer flange portion 652. The first receiving portion 631 provided on the first flange portion 625 is composed of a first engagement portion 655 and a first cutout portion 665. The first receiving portion 631 is formed by the first engagement portion 655 overlapping the first cutout portion 665 from above, and penetrates the first flange portion 625 from above.

[0103] 16 and 19, the first engagement portion 655 is a recess formed by cutting out the first outer flange portion 652 so as to fit along the outer periphery of the hanging bolt 12. The first engagement portion 655 is formed in a substantially semicircular arc shape that fits along the outer periphery of the hanging bolt 12, and can be screwed into the threaded portion 12b. The first engagement portion 655 has the same shape as the first engagement portion 31 (see FIGS. 4A and 4B) in the first embodiment described above, and therefore a detailed description of the shape will be omitted.

[0104] The first cutout portion 665 is a substantially rectangular cutout when viewed from above, and a bottom portion 665a (FIG. 16) of the first cutout portion 665 is substantially parallel to the cover receiving surface 624a.

[0105] As shown in FIG. 19, the depth A of the first engagement portion 655 from the cover receiving surface 624 a is set to be equal to the diameter of the suspension bolt 12 . In addition, the depth of a bottom 665a (FIG. 16) of the first cutout portion 665 from the cover receiving surface 624a is set to be greater than the depth A.

[0106] The second flange portion 626 of the fixing member 621 is composed of a second outer flange portion 653 and a second inner flange portion 663. The second inner flange portion 663 is disposed so as to overlap the second outer flange portion 653 from above, and extends parallel to the second outer flange portion 653. The second inner flange portion 663 is disposed above the second outer flange portion 653 and spaced apart. The second receiving portion 632 provided on the second flange portion 626 is composed of a second engagement portion 656 and a second cutout portion 666. The second receiving portion 632 is formed by the second engagement portion 656 overlapping the second cutout portion 666 from below, and penetrates the second flange portion 626 from above to below.

[0107] 19, the second engagement portion 656 (FIG. 16) is a recess formed by cutting out the first outer flange portion 652 so as to fit along the outer periphery of the hanging bolt 12. The second engagement portion 656 is formed in a substantially semicircular arc shape that fits along the outer periphery of the hanging bolt 12, and can be screwed into the threaded portion 12b. The second engaging portion 656 has the same shape as the second engaging portion 32 of the first embodiment, and therefore a detailed description of the shape will be omitted.

[0108] The second cutout portion 666 (FIG. 16) is a substantially rectangular cutout when viewed from above, and a bottom portion 666a of the second cutout portion 666 is substantially parallel to the cover receiving surface 624a.

[0109] The depth A (see FIG. 19) of the second engagement portion 656 from the cover receiving surface 624a is set to be equal to the diameter of the suspension bolt 12. Further, the depth of the bottom 666a of the second cutout portion 666 from the cover receiving surface 624a is set to be greater than the depth A.

[0110] The rotation shaft fixing hole 624b and the fixing hole 624c of the fixing member 621 are holes that penetrate the inner plate portion 661 and the outer plate portion 651 in the plate thickness direction. The inner fixing member 660 is fastened to the outer fixing member 650 by a fastener 624d that is inserted into the fixing hole 624c from the cover receiving surface 624a side. The fastener 624d is, for example, a bolt. The inner fixing member 660 is also fastened to the outer fixing member 650 by the rotating shaft 623 inserted into the rotating shaft fixing hole 624b. The rotating shaft 623 is a pin member that is crimped to the plate portion 624, for example. 17, the rotation shaft 623 is disposed on one side in the width direction of the plate portion 624 with the opening 630 as the boundary. The fastener 624d is disposed on the other side in the width direction of the plate portion 624 with the opening 630 as the boundary.

[0111] 15 to 20, the cover member 622 is formed to be longer in the up-down direction than the fixed member 621. The cover member 622 includes a rotating plate portion 641 facing the cover receiving surface 624a of the plate portion 624, and a pair of side ribs 642 erected from both end edges of the rotating plate portion 641 in the width direction (short side direction). The side rib 642 is erected from the rotating plate portion 641 toward the front side. The cover member 622 is attached to the fixed member 621 by a rotation shaft 623 that is inserted into the upper part of the rotating plate portion 641 , and is rotatable about the rotation shaft 623 .

[0112] The rear surface of the upper part of the rotating plate portion 641 is a contact surface 643 that rotates while being in contact with the cover receiving surface 624a. The cover member 622 is provided with an attachment portion 644 below the contact surface 643. The attachment portion 644 extends outward from the fixed member 621 relative to the contact surface 643. The brace material 15 (see FIGS. 1 and 15) is attached to the attachment portion 644 by fasteners such as bolts.

[0113] When attaching the fixing device 610 to the hanging bolt 12, the fixing device 610 is in a state in which the opening 630 and the cover member 622 are approximately parallel to each other, and the entire opening 630 is open forward, as shown in FIG. 15 . Next, the rod-shaped member insertion portion 627 is engaged with the threaded portion 12b of the hanging bolt 12 from a direction perpendicular to the hanging bolt 12. Here, the worker can adjust the position of the fixing device 610 by engaging the rod-shaped member insertion portion 627 with the hanging bolt 12 at any position in the vertical direction.

[0114] 17 to 20, when the cover member 622 is rotated to close a part of the opening 630 with the cover member 622, the fixture 610 is fixed to the hanging bolt 12. In this fixed state, the abutment surface 643 of the cover member 622 abuts against the outer periphery of the hanging bolt 12, and the hanging bolt 12 is sandwiched between the abutment surface 643 and the first engagement portion 655 and the second engagement portion 656. The portion of the abutment surface 643 in the fixed state that abuts against the outer periphery of the hanging bolt 12 is a flat surface parallel to the cover receiving surface 624a.

[0115] Here, the depth A (FIG. 19) of the first engagement portion 655 and the second engagement portion 656 from the cover receiving surface 624a is set to be equal to the diameter of the hanging bolt 12. In detail, the depth A may be the same as the diameter of the hanging bolt 12, slightly smaller than the diameter of the hanging bolt 12, or slightly larger than the diameter of the hanging bolt 12, so long as the depth A is equal to the diameter of the hanging bolt 12 to such an extent that the hanging bolt 12 can be sandwiched between the abutment surface 643, which is a flat surface, and the first engagement portion 655 and the second engagement portion 656.

[0116] Since the depth of the bottom 665a (Figure 16) of the first cutout portion 665 and the depth of the bottom 666a of the second cutout portion 666 are set to be greater than the depth A, the bottom 665a and the bottom 666a move rearward relative to the hanging bolt 12 and do not abut against the outer periphery of the hanging bolt 12.

[0117] In the above-mentioned fixed state, the first engagement portion 655 and the second engagement portion 656 are engaged with the threaded portion 12b of the hanging bolt 12, and the female threaded portion 630a of the opening 630 is engaged with the threaded portion 12b. Therefore, the fixing device 610 can be fixed to the hanging bolt 12 by the first engagement portion 655, the second engagement portion 656, and the female threaded portion 630a, and the fixing device 610 can be firmly fixed to the hanging bolt 12. The female thread portion 630a is provided over a long range in the axial direction of the hanging bolt 12 between the first engagement portion 655 and the second engagement portion 656. The female thread portion 630a is provided over a range in the axial direction of the hanging bolt 12 that is longer than the diameter of the hanging bolt 12. This makes it possible to ensure a large area for the engagement portion between the fixing device 610 and the hanging bolt 12, and the fixing device 610 can be firmly fixed to the hanging bolt 12. The female thread portion 630a is provided over the entire inner plate portion 661 in the plate thickness direction.

[0118] 20, in the above-mentioned fixed state, the female thread portion 630a is located in the middle of the first engagement portion 655 and the second engagement portion 656 in the direction of depth A, and is disposed at a position overlapping with the axis 12a of the hanging bolt 12 in the direction of depth A. Therefore, the female thread portion 630a can be engaged with the thread portion 12b at a position close to the center of the hanging bolt 12, and the female thread portion 630a can be appropriately engaged with the thread portion 12b.

[0119] In addition, washer-shaped spacers 645a, 645b shown in phantom lines in Figure 16 may be placed between the inner plate portion 661 and the outer plate portion 651, and the position of the inner plate portion 661 may be adjusted so that the position of the female thread portion 630a overlaps the position of the axis 12a. The fastener 624d is inserted through the spacer 645a, and the rotation shaft 623 is inserted through the spacer 645b.

[0120] 4B, the distance D between the first engagement portion 655 (corresponding to the first engagement portion 31) and the second engagement portion 656 (corresponding to the second engagement portion 32) is an integer multiple of the pitch P (see FIG. 5) of the threaded portion 12b of the hanging bolt 12. Therefore, both the first engagement portion 655 and the second engagement portion 656 can be appropriately engaged with the threaded portion 12b. Furthermore, each thread of the female thread portion 630a is disposed at a position that is an integer multiple of the pitch P (see FIG. 5) of the thread portion 12b from the first engagement portion 655 (corresponding to the first engagement portion 31).

[0121] As described above, according to the sixth embodiment to which the present invention is applied, the fixture 610 includes a fixing member 621 that engages with the hanging bolt 12, and a cover member 622 that is attached to the fixing member 621 and holds the hanging bolt 12 between the fixing member 621 and the cover member 622. The fixing member 621 includes a plate portion 624 that extends in the axial direction of the hanging bolt 12, a first flange portion 625 that extends from the plate portion 624, a second flange portion 626 that extends from the plate portion 624 at a position separated from the first flange portion 625 in the axial direction of the hanging bolt 12, and a rod-shaped member insertion portion 627 through which the hanging bolt 12 is inserted. The rod-shaped member insertion portion 627 includes an opening 630 formed by cutting out the plate portion 624 along the hanging bolt 12, a first receiving portion 631 formed by cutting out the first flange portion 625 in a concave shape from the plate portion 624 side, and a second receiving portion 632 formed by cutting out the second flange portion 626 in a concave shape from the plate portion 624 side. A female thread portion 630a is formed on the edge of the opening 630 to sandwich the hanging bolt 12 from both radially outer sides, and the hanging bolt 12 sandwiched between the fixing member 621 and the cover member 622 abuts against the first receiving portion 631 and the second receiving portion 632, and the thread portion 12b on the outer periphery of the hanging bolt 12 engages with the female thread portion 630a. According to this configuration, the first flange portion 625 and the second flange portion 626 extending from the plate portion 624 function as reinforcing ribs for the plate portion 624, thereby increasing the rigidity of the fixing member 621 and suppressing deformation of the fixing member 621 due to an external force. Furthermore, the hanging bolt 12 can be received by the first receiving portion 631 and the second receiving portion 632 provided by utilizing the first flange portion 625 and the second flange portion 626, and the threaded portion 12b of the hanging bolt 12 engages with the female threaded portion 630a provided in the opening 630 cut out of the plate portion 624, so that the fixing device 610 can be firmly fixed to the hanging bolt 12 with a simple structure.

[0122] In addition, the cover member 622 has an abutment surface 643 that abuts against the outer peripheral surface of the hanging bolt 12 and the plate portion 624, and the plate portion 624 has a cover receiving surface 624a that receives the abutment surface 643, the depth A of the first receiving portion 631 and the second receiving portion 632 from the cover receiving surface 624a is set to be equal to the diameter of the hanging bolt 12, and the female thread portion 630a is provided at a position spaced from the cover receiving surface 624a in the depth direction of the first receiving portion 631 and the second receiving portion 632. According to this configuration, the abutment surface 643 of the cover member 622 can be abutted against the outer circumferential surface of the hanging bolt 12 and the cover receiving surface 624a in a state where the diameter of the hanging bolt 12 is accommodated within the first receiving portion 631 and the second receiving portion 632. Therefore, the abutment surface 643 can be made flat, and the abutment surface 643 can have a simple shape. In addition, since the female thread portion 630a is provided at a position spaced from the cover receiving surface 624a in the depth direction of the first receiving portion 631 and the second receiving portion 632, the female thread portion 630a can be engaged with the thread portion 12b at a position close to the center of the hanging bolt 12, and the female thread portion 630a can be effectively engaged with the thread portion 12b. Here, the depth A of the first receiving portion 631 is the depth of the portion where the first receiving portion 631 receives the hanging bolt 12 in the direction of depth A, and is the depth of the first engagement portion 655. The depth A of the second receiving portion 632 is the depth of the portion where the second receiving portion 632 receives the hanging bolt 12 in the direction of depth A, and is the depth of the second engagement portion 656.

[0123] In addition, in the direction of the depth A, the position of the female thread portion 630a and the position of the axis 12a of the hanging bolt 12 overlap each other. According to this configuration, the female threaded portion 630a engages with the threaded portion 12b of the hanging bolt 12 at a position where the female threaded portion 630a overlaps with the position of the axis 12a of the hanging bolt 12, so that the female threaded portion 630a can be effectively engaged with the threaded portion 12b.

[0124] In addition, the fixing member 621 includes an outer fixing member 650 having a cover receiving surface 624a and an inner fixing member 660 having a female thread portion 630a, and the inner fixing member 660 is attached to the outer fixing member 650 so that the female thread portion 630a is exposed from an outer opening 654 provided in the cover receiving surface 624a. According to this configuration, when the inner fixing member 660 is attached to the outer fixing member 650, the female thread portion 630a is exposed from the outer opening 654, so that the fixing member 621 can be easily formed in which the female thread portion 630a is located at a position spaced apart from the cover receiving surface 624a in the direction of depth A.

[0125] In addition, the cover member 622 can rotate around a pivot axis 623 provided on the plate portion 624 to open and close the opening 630, and when the cover member 622 covers the opening 630, the hanging bolt 12 is clamped between the first receiving portion 631 and the second receiving portion 632 and the cover member 622. According to this configuration, the hanging bolt 12 is set in the first receiving portion 631, the second receiving portion 632, and the female thread portion 630a from the cover receiving surface 624a side, and the opening 630 is closed by the cover member 622 by rotating the cover member 622 about the rotating shaft 623, whereby the fixing device 610 can be fixed to the hanging bolt 12. Therefore, the fixing device 610 can be easily fixed to the hanging bolt 12.

[0126] The cover member 622 also includes an attachment portion 644 to which the rod-shaped brace material 15 is connected. According to this configuration, the brace material 15 can be easily fixed to the hanging bolt 12 via the fixing device 610. In addition, the fixing device 610 can be easily attached to the hanging bolt 12 by rotating the cover member 622 as the brace material 15.

[0127] [Seventh embodiment] A seventh embodiment to which the present invention is applied will be described below with reference to FIGS.

[0128] FIG. 21 is a front view showing a fixture 710 according to the seventh embodiment. 1 and 21, a fixture 710 is fixed to a hanging bolt 12 (a rod-shaped member) in place of the fixture 10 shown in FIG. The fixture 710 is attached to the upper end of the hanging bolt 12. A rod-shaped brace material 15 is attached to the fixture 710. The upper end of the brace material 15 is connected to the fixing device 710. The brace material 15 extends diagonally downward from the fixing device 710 and is connected to the joist support 13.

[0129] Fig. 22 is an exploded perspective view of the fixture 710. Fig. 23 is a front view showing the fixture 710 in a state where it is fixed to the hanging bolt 12. Fig. 24 is a rear view showing the fixture 710 in a state where it is fixed to the hanging bolt 12. Fig. 25 is a plan view showing the fixture 710 in a state where it is fixed to the hanging bolt 12, as viewed from above. Fig. 26 is a side view showing the fixture 710 in a state where it is fixed to the hanging bolt 12, as viewed from the side.

[0130] 21 to 26, fixture 710 includes a fixing member 721 that engages with suspension bolt 12, a cover member 722 rotatably attached to fixing member 721, and a rotating shaft 723 that supports cover member 722 on fixing member 721 so as to be rotatable. The fixture 710 is fixed to the suspension bolt 12 by clamping the suspension bolt 12 between a fixing member 721 and a cover member 722 .

[0131] 22 and 26, the fixing member 721 is configured by attaching an inner fixing member 760 disposed inside the outer fixing member 750 to an outer fixing member 750 with which the cover member 722 abuts. The detailed structures of outer fixing member 750 and inner fixing member 760 will be described later, and first fixing member 721 will be described.

[0132] The fixing member 721 comprises a plate portion 724 extending in the axial direction of the hanging bolt 12 parallel to the hanging bolt 12, a first flange portion 725 extending from one end (upper end) of the plate portion 724, a second flange portion 726 extending from the other end (lower end) of the plate portion 724, and a rod-shaped member insertion portion 727 through which the hanging bolt 12 is inserted.

[0133] The plate portion 724 is a substantially rectangular flat plate when viewed from the front perpendicular to the axis 12a of the hanging bolt 12 (see FIG. 23). The outer surface of the plate portion 724 in the plate thickness direction is a cover receiving surface 724a that receives the cover member 722. The cover member 722 rotates on the cover receiving surface 724a. The plate portion 724 has a pivot fixing hole 724b into which the pivot shaft 723 is inserted, a fixing hole 724c penetrating the plate portion 724 in the thickness direction, and a plurality of holes 724e penetrating the plate portion 724 in the thickness direction above the fixing hole 724c.

[0134] The first flange portion 725 and the second flange portion 726 extend in a direction substantially perpendicular to the plate portion 724, in a direction opposite to the cover receiving surface 724a side. The rotating shaft 723 is fixed to the rotating shaft fixing hole 724b. The rotating shaft 723 extends from the cover receiving surface 724a in the opposite direction to the extending direction of the first flange portion 725.

[0135] The first flange portion 725 and the second flange portion 726 face each other and are arranged parallel to each other. Furthermore, the first flange portion 725 and the second flange portion 726 extend from the plate portion 724 by the same length.

[0136] 23 and 24, when viewed in a direction perpendicular to the cover receiving surface 724a of the plate portion 724, the first flange portion 725 and the second flange portion 726 are perpendicular to the axis 12a of the hanging bolt 12. In other words, the first flange portion 725 and the second flange portion 726 are disposed substantially horizontally.

[0137] The rod-shaped member insertion portion 727 includes an opening 730 formed by cutting out the plate portion 724 along the hanging bolt 12 arranged in the rod-shaped member insertion portion 727, a first receiving portion 731 formed by cutting out the first flange portion 725 in a concave shape from the plate portion 724 side, and a second receiving portion 732 formed by cutting out the second flange portion 726 in a concave shape from the plate portion 724 side.

[0138] The opening 730 is a vertically long opening that continues from the upper end to the lower end of the plate portion 724 along the hanging bolt 12. The opening 730 is disposed in the center of the fixing member 721 in the width direction (left-right direction). Here, the up-down direction of the fixture 710 coincides with the axial direction of the hanging bolt 12. The left-right direction, which coincides with the width direction of the fixing member 721, is a direction perpendicular to the axis 12a and the axial direction of the rotating shaft 723, and the front-rear direction of the fixing member 721 is the axial direction of the rotating shaft 723.

[0139] 21 and 23, the opening 730 has a pair of edges that sandwich the hanging bolt 12 from both radially outer sides in front view as shown in Fig. 23, and these edges are formed with a female thread portion 730a that sandwiches the hanging bolt 12 from both radially outer sides. The female thread portion 730a is formed by forming a plurality of protrusions functioning as threads on the edge of the opening 730 in the axial direction of the hanging bolt 12 at the same pitch as the pitch P of the hanging bolt 12. The width of the female thread portion 730a is slightly larger than the diameter of the hanging bolt 12. The hanging bolt 12 has a threaded portion 12b formed on the outer periphery over the entire length of the hanging bolt 12. When the hanging bolt 12 is placed in the rod-shaped member insertion portion 727, the female threaded portion 730a engages with the threaded portion 12b. The female thread portion 730 a extends in the axial direction of the hanging bolt 12 between the first receiving portion 731 and the second receiving portion 732 .

[0140] 21, 22 and 25, the first receiving portion 731 is a recess formed by cutting out the first flange portion 725 so as to fit along the outer periphery of the hanging bolt 12. The first receiving portion 731 communicates with the upper end of the opening 730. Further, the second receiving portion 732 is a recess formed by cutting out the second flange portion 726 so as to fit along the outer periphery of the hanging bolt 12. The second receiving portion 732 communicates with the lower end of the opening 730. When the hanging bolt 12 is placed in the rod-shaped member insertion portion 727 , the first receiving portion 731 and the second receiving portion 732 come into contact with the threaded portion 12 b of the hanging bolt 12 to receive the hanging bolt 12 .

[0141] 21 to 26, the outer fixing member 750 of the fixing member 721 comprises an outer plate portion 751 having a cover receiving surface 724a, a first outer flange portion 752 extending from one end (upper end portion) of the outer plate portion 751, and a second outer flange portion 753 extending from the other end (lower end portion) of the outer plate portion 751. The outer fixing member 750 also has an outer opening 754 formed by cutting out the outer plate portion 751 along the hanging bolt 12, a first cutout portion 755 formed by cutting out the first outer flange portion 752 in a concave shape from the outer plate portion 751 side, and a second cutout portion 756 formed by cutting out the second outer flange portion 753 in a concave shape from the outer plate portion 751 side.

[0142] The inner fixing member 760 of the fixing member 721 comprises an inner plate portion 761 attached to the inner surface of the outer plate portion 751, a first inner flange portion 762 extending from one end (upper end portion) of the inner plate portion 761, and a second inner flange portion 763 extending from the other end (lower end portion) of the inner plate portion 761. The inner fixing member 760 also has an inner opening 764 formed by cutting out the inner plate portion 761 along the hanging bolt 12, a first recess 765 formed by cutting out the first inner flange portion 762 in a concave shape from the inner plate portion 761 side, and a second recess 766 formed by cutting out the second inner flange portion 763 in a concave shape from the inner plate portion 761 side. The inner opening 764 has a pair of edges that sandwich the hanging bolt 12 from both radially outer sides, and a female thread portion 730a is formed on these edges.

[0143] The inner fixing member 760 is formed so that its vertical length is smaller than that of the outer fixing member 750 , and is housed between the first outer flange portion 752 and the second outer flange portion 753 . The inner plate portion 761 and the outer plate portion 751 are generally rectangular plates when viewed from the front, and are provided parallel to each other. The inner fixing member 760 is fixed to the outer fixing member 750 by attaching the inner plate portion 761 to the inner surface of the outer plate portion 751.

[0144] The plate portion 724 of the fixing member 721 is composed of an outer plate portion 751 and an inner plate portion 761 . The opening 730 of the plate portion 724 is composed of an outer opening 754 and an inner opening 764. The outer opening 754 overlaps with the inner opening 764 from the front side. When viewed from the front, the left and right width of the outer opening 754 is formed larger than the left and right width of the inner opening 764, and the female thread portion 730a protrudes inward of the opening 730 from the left and right edges 754a of the outer opening 754. The female thread portion 730a is exposed forward from the outer opening 754 (FIG. 21). The female thread portion 730a is spaced rearward from the cover receiving surface 724a by the thickness of the outer plate portion 751.

[0145] The first flange portion 725 of the fixing member 721 is composed of a first outer flange portion 752 and a first inner flange portion 762. The first inner flange portion 762 is disposed so as to overlap the first outer flange portion 752 from below, and extends parallel to the first outer flange portion 752. The first inner flange portion 762 is disposed below and spaced apart from the first outer flange portion 752. The first receiving portion 731 provided in the first flange portion 725 is configured by a first cutout portion 755 and a first recess 765. The first receiving portion 731 is formed by the first cutout portion 755 overlapping the first recess 765 from above, and penetrates the first flange portion 725 from above.

[0146] 22 and 25, the first recess 765 is a substantially rectangular cutout when viewed from above, and a bottom 765a (FIG. 22) of the first recess 765 is substantially parallel to the cover receiving surface 724a. Moreover, the first cutout portion 755 is a substantially rectangular cutout when viewed from above, and a bottom portion 755a (FIG. 22) of the first cutout portion 755 is substantially parallel to the cover receiving surface 724a. The width of the first recess 765 is larger than the diameter of the suspension bolt 12 , and the width of the first cutout portion 755 is larger than the width of the first recess 765 .

[0147] As shown in FIG. 25, the depth A1 of the bottom 765a of the first recess 765 from the cover receiving surface 724a (the depth of the first receiving portion 731) is set to be equal to the diameter of the suspension bolt 12. Further, the depth of the bottom 755a of the first cutout portion 755 from the cover receiving surface 724a is set to be greater than the depth A1.

[0148] The second flange portion 726 of the fixing member 721 is composed of a second outer flange portion 753 and a second inner flange portion 763. The second inner flange portion 763 is disposed so as to overlap the second outer flange portion 753 from above, and extends parallel to the second outer flange portion 753. The second inner flange portion 763 is disposed above and spaced apart from the second outer flange portion 753. The second receiving portion 732 provided on the second flange portion 726 is configured by a second recess 766 and a second cutout portion 756. The second receiving portion 732 is formed by the second cutout portion 756 overlapping the second recess 766 from below, and penetrates the second flange portion 726 from above to below.

[0149] The second recess 766 (FIG. 22) is a generally rectangular cutout when viewed from above, and a bottom 766a of the second recess 766 is generally parallel to the cover receiving surface 724a. Moreover, the second cutout portion 756 (FIG. 22) is a substantially rectangular cutout when viewed from above, and a bottom portion 756a of the second cutout portion 756 is substantially parallel to the cover receiving surface 724a. The width of the second recess 766 is larger than the diameter of the suspension bolt 12 , and the width of the second cutout portion 756 is larger than the width of the second recess 766 .

[0150] 25, the depth A1 of the bottom 766a of the second recess 766 from the cover receiving surface 724a (the depth of the second receiving portion 732) is set to be equal to the diameter of the suspension bolt 12. Further, the depth of the bottom 756a of the second cutout portion 756 from the cover receiving surface 724a is set to be greater than the depth A1.

[0151] The rotation shaft fixing hole 724b and the fixing hole 724c of the fixing member 721 are holes that penetrate the inner plate portion 761 and the outer plate portion 751 in the plate thickness direction. The inner fixing member 760 is fastened to the outer fixing member 750 by a fastener 724d that is inserted into the fixing hole 724c from the cover receiving surface 724a side. The fastener 724d is a pin member that is crimped to the plate portion 724, for example. The inner fixed member 760 is also fastened to the outer fixed member 750 by the rotating shaft 723 inserted into the rotating shaft fixing hole 724b. The rotating shaft 723 is a pin member that is crimped to the plate portion 724, for example. 23, the rotation shaft 723 is disposed on one side in the width direction of the plate portion 724 with the opening 730 as the boundary. The fastener 724d is disposed on the other side in the width direction of the plate portion 724 with the opening 730 as the boundary.

[0152] 21 to 26, the cover member 722 is formed to be longer in the up-down direction than the fixed member 721. The cover member 722 includes a rotating plate portion 741 facing the cover receiving surface 724a of the plate portion 724, and a pair of side ribs 742 erected from both end edges of the rotating plate portion 741 in the width direction (short side direction). The side rib 742 is provided upright from the rotating plate portion 741 toward the front side. The cover member 722 is attached to the fixed member 721 by a rotation shaft 723 that is inserted into the upper part of the rotating plate portion 741 , and is rotatable about the rotation shaft 723 .

[0153] The rear surface of the upper part of the rotating plate portion 741 is a contact surface 743 that rotates while being in contact with the cover receiving surface 724a. The cover member 722 is provided with an attachment portion 744 below the contact surface 743. The attachment portion 744 extends outward from the fixed member 721 relative to the contact surface 743. The brace material 15 (see FIGS. 1 and 21) is attached to the attachment portion 744 by fasteners such as bolts.

[0154] When attaching the fixing device 710 to the hanging bolt 12, the fixing device 710 is in a state in which the opening 730 and the cover member 722 are approximately parallel to each other, and the entire opening 730 is open forward, as shown in FIG. Next, the rod-shaped member insertion portion 727 is engaged with the threaded portion 12b of the hanging bolt 12 from a direction perpendicular to the hanging bolt 12. Here, the worker can adjust the position of the fixing device 710 by engaging the rod-shaped member insertion portion 727 with the hanging bolt 12 at any position in the vertical direction.

[0155] 23 to 26, when the cover member 722 is rotated to close a part of the opening 730 with the cover member 722, the fixture 710 is fixed to the hanging bolt 12. In this fixed state, the abutment surface 743 of the cover member 722 abuts against the outer periphery of the hanging bolt 12, and the hanging bolt 12 is sandwiched between the abutment surface 743 and the first recess 765 and the second recess 766. The portion of the abutment surface 743 in the fixed state that abuts against the outer periphery of the hanging bolt 12 is a flat surface parallel to the cover receiving surface 724a.

[0156] In detail, in the first receiving portion 731, the bottom 765a of the first recess 765 abuts against the outer periphery of the hanging bolt 12 from behind, thereby sandwiching the hanging bolt 12 between the cover receiving surface 724a and the bottom 765a. Here, the plate thickness of the bottom 765a is greater than the pitch P (see FIG. 5) of the threaded portion 12b, and the threaded portion 12b has an inclination angle θ with respect to the horizontal. Therefore, the bottom 765a does not engage with the threaded portion 12b, but only abuts against the outer periphery of the threaded portion 12b.

[0157] Similarly, in the second receiving portion 732, the bottom 766a of the second recess 766 abuts against the outer periphery of the hanging bolt 12 from behind, thereby sandwiching the hanging bolt 12 between the cover receiving surface 724a. Here, the plate thickness of the bottom 766a is greater than the pitch P (see FIG. 5) of the threaded portion 12b, and the threaded portion 12b has an inclination angle θ with respect to the horizontal. Therefore, the bottom 766a does not engage with the threaded portion 12b, but only abuts against the outer periphery of the threaded portion 12b.

[0158] 25 and 26, the depth A1 of the first receiving portion 731 and the second receiving portion 732 from the cover receiving surface 724a is set to be equal to the diameter of the hanging bolt 12. In detail, the depth A1 may be the same as the diameter of the hanging bolt 12, slightly smaller than the diameter of the hanging bolt 12, or slightly larger than the diameter of the hanging bolt 12, so long as the depth A1 is equal to the diameter of the hanging bolt 12 to such an extent that the hanging bolt 12 can be sandwiched between the abutment surface 743, which is a flat surface, and the first receiving portion 731 and the second receiving portion 732.

[0159] Since the depth of the bottom 755a (Figure 25) of the first cutout portion 755 and the depth of the bottom 756a (Figure 22) of the second cutout portion 756 are set to be greater than the depth A1, the bottom 755a and the bottom 756a move rearward relative to the hanging bolt 12 and do not abut against the outer periphery of the hanging bolt 12.

[0160] In the above-mentioned fixed state, the first receiving portion 731 and the second receiving portion 732 abut against the threaded portion 12b of the hanging bolt 12, and the female threaded portion 730a of the opening 730 engages with the threaded portion 12b. Therefore, the fixing device 710 can be fixed to the hanging bolt 12 by the first receiving portion 731, the second receiving portion 732, and the female threaded portion 730a, and the fixing device 710 can be firmly fixed to the hanging bolt 12. The female thread portion 730a is provided over a long range in the axial direction of the hanging bolt 12 between the first receiving portion 731 and the second receiving portion 732. The female thread portion 730a is provided over a range in the axial direction of the hanging bolt 12 that is longer than the diameter of the hanging bolt 12. This makes it possible to ensure a large area for the engagement portion between the fixing device 710 and the hanging bolt 12, and the fixing device 710 can be firmly fixed to the hanging bolt 12. The female thread portion 730a is provided over the entire inner plate portion 761 in the plate thickness direction.

[0161] 26, in the above-mentioned fixed state, the female thread portion 730a is located in the middle of the first receiving portion 731 and the second receiving portion 732 in the depth A1 direction, and is disposed at a position overlapping with the axis 12a of the hanging bolt 12 in the depth A1 direction. Therefore, the female thread portion 730a can be engaged with the thread portion 12b at a position close to the center of the hanging bolt 12, and the female thread portion 730a can be appropriately engaged with the thread portion 12b.

[0162] In addition, a spacer (for example, washer-shaped spacers 645a, 645b shown in phantom lines in Figure 16) may be placed between the inner plate portion 761 and the outer plate portion 751, and the position of the inner plate portion 761 may be adjusted so that the position of the female thread portion 730a overlaps the position of the axis 12a.

[0163] As described above, according to the seventh embodiment to which the present invention is applied, the fixture 710 includes a fixing member 721 that engages with the hanging bolt 12, and a cover member 722 that is attached to the fixing member 721 and holds the hanging bolt 12 between the fixing member 721 and the cover member 722. The fixing member 721 includes a plate portion 724 that extends in the axial direction of the hanging bolt 12, a first flange portion 725 that extends from the plate portion 724, a second flange portion 726 that extends from the plate portion 724 at a position separated from the first flange portion 725 in the axial direction of the hanging bolt 12, and a rod-shaped member insertion portion 727 through which the hanging bolt 12 is inserted. The rod-shaped member insertion portion 727 includes an opening 730 formed by cutting out the plate portion 724 along the hanging bolt 12, a first receiving portion 731 formed by cutting out the first flange portion 725 in a concave shape from the plate portion 724 side, and a second receiving portion 732 formed by cutting out the second flange portion 726 in a concave shape from the plate portion 724 side. A female thread portion 730a is formed on the edge of the opening 730 to sandwich the hanging bolt 12 from both radially outer sides, and the hanging bolt 12 sandwiched between the fixing member 721 and the cover member 722 abuts against the first receiving portion 731 and the second receiving portion 732, and the thread portion 12b on the outer periphery of the hanging bolt 12 engages with the female thread portion 730a. According to this configuration, the first flange portion 725 and the second flange portion 726 extending from the plate portion 724 function as reinforcing ribs for the plate portion 724, thereby increasing the rigidity of the fixing member 721 and suppressing deformation of the fixing member 721 due to external forces. Furthermore, the hanging bolt 12 can be received by the first receiving portion 731 and the second receiving portion 732 provided by utilizing the first flange portion 725 and the second flange portion 726, and the threaded portion 12b of the hanging bolt 12 engages with the female threaded portion 730a provided in the opening 730 cut out of the plate portion 724, so that the fixing device 710 can be firmly fixed to the hanging bolt 12 with a simple structure.

[0164] In addition, the cover member 722 has an abutment surface 743 that abuts against the outer peripheral surface of the hanging bolt 12 and the plate portion 724, and the plate portion 724 has a cover receiving surface 724a that receives the abutment surface 743, the depth A1 of the first receiving portion 731 and the second receiving portion 732 from the cover receiving surface 724a is set to be equal to the diameter of the hanging bolt 12, and the female thread portion 730a is provided at a position spaced from the cover receiving surface 724a in the direction of the depth A1 of the first receiving portion 731 and the second receiving portion 732. According to this configuration, the abutment surface 743 of the cover member 722 can abut against the outer circumferential surface of the hanging bolt 12 and the cover receiving surface 724a in a state where the diameter of the hanging bolt 12 is accommodated within the first receiving portion 731 and the second receiving portion 732. Therefore, the abutment surface 743 can be made flat, and the abutment surface 743 can have a simple shape. In addition, since the female thread portion 730a is provided at a position spaced from the cover receiving surface 724a in the direction of the depth A1 of the first receiving portion 731 and the second receiving portion 732, the female thread portion 730a can be engaged with the thread portion 12b at a position close to the center of the hanging bolt 12, and the female thread portion 730a can be effectively engaged with the thread portion 12b. Here, the depth A1 of the first receiving portion 731 is the depth of the portion where the first receiving portion 731 receives the hanging bolt 12 in the direction of the depth A1, and is the depth of the first recess 765. The depth A1 of the second receiving portion 732 is the depth of the portion where the second receiving portion 732 receives the hanging bolt 12 in the direction of the depth A1, and is the depth of the second recess 766.

[0165] Furthermore, in the direction of the depth A1, the position of the female thread portion 730a and the position of the axis 12a of the hanging bolt 12 overlap each other. According to this configuration, the female threaded portion 730a engages with the threaded portion 12b of the hanging bolt 12 at a position where the female threaded portion 730a overlaps with the position of the axis 12a of the hanging bolt 12, so that the female threaded portion 730a can be effectively engaged with the threaded portion 12b.

[0166] In addition, the fixing member 721 includes an outer fixing member 750 having a cover receiving surface 724a and an inner fixing member 760 having a female thread portion 730a, and the inner fixing member 760 is attached to the outer fixing member 750 so that the female thread portion 730a is exposed from an outer opening 754 provided in the cover receiving surface 724a. According to this configuration, when the inner fixing member 760 is attached to the outer fixing member 750, the female thread portion 730a is exposed from the outer opening 754, so that a fixing member 721 can be easily formed in which the female thread portion 730a is provided at a position spaced apart from the cover receiving surface 724a in the direction of the depth A1 of the first receiving portion 731 and the second receiving portion 732. Although the fixing member 721 is formed by attaching the outer fixing member 750 and the inner fixing member 760, the present invention is not limited to this. For example, the fixing member may be constituted only by the outer fixing member 750 without providing the inner fixing member 760, the first recess 765 and the second recess 766 may be integrally provided in the outer fixing member 750, and the female screw portion 730a may be formed integrally with the outer fixing member 750 at a position spaced apart in the depth A1 direction from the cover receiving surface 724a of the outer fixing member 750.

[0167] In addition, the cover member 722 can rotate around a pivot axis 723 provided on the plate portion 724 to open and close the opening 730, and when the cover member 722 covers the opening 730, the hanging bolt 12 is clamped between the first receiving portion 731 and the second receiving portion 732 and the cover member 722. According to this configuration, the hanging bolt 12 is set in the first receiving portion 731, the second receiving portion 732, and the female thread portion 730a from the cover receiving surface 724a side, and the opening 730 is closed by the cover member 722 by rotating the cover member 722 about the rotating shaft 723, whereby the fixing device 710 can be fixed to the hanging bolt 12. Therefore, the fixing device 710 can be easily fixed to the hanging bolt 12.

[0168] The cover member 722 also includes an attachment portion 744 to which the rod-shaped brace material 15 is connected. According to this configuration, the brace material 15 can be easily fixed to the hanging bolt 12 via the fixing device 710. In addition, the cover member 722 can be easily rotated via the brace material 15, so that the fixing device 710 can be easily attached to the hanging bolt 12.

[0169] [Eighth embodiment] An eighth embodiment to which the present invention is applied will be described below with reference to Fig. 27. In this eighth embodiment, parts configured similarly to the seventh embodiment will be given the same reference numerals and descriptions thereof will be omitted. The eighth embodiment differs from the seventh embodiment in that a support member 870 to which a second brace material 815 can be attached is provided.

[0170] FIG. 27 is a front view showing a fixture 810 according to the eighth embodiment. Fixing device 810 includes a fixing member 721, a cover member 722, a rotating shaft 723, a support member 870 attached to fixing member 721, and a second rotating shaft 823 that supports support member 870 on fixing member 721 so as to be rotatable.

[0171] The second rotating shaft 823 is inserted into the fixing hole 724c (FIG. 22) and fixed to the plate portion 724. The second rotating shaft 823 extends forward from the cover receiving surface 724a in parallel with the rotating shaft 723. The second rotating shaft 823 is a pin member that is fixed to the plate portion 724 by crimping, and fastens the outer plate portion 751 and the inner plate portion 761 together. The second rotating shaft 823 is provided on the opposite side to the rotating shaft 723 across the opening 730 in front view.

[0172] The support member 870 has one end in the longitudinal direction coupled to the second rotation shaft 823. The support member 870 is rotatable about the second rotation shaft 823 on the cover receiving surface 724a. The support member 870 is provided at the other end in the longitudinal direction with a brace connection part 871 to which one end (upper end) of a rod-shaped second brace material 815 is attached. The other end (lower end) of the second brace material 815 is connected to, for example, a joist support 13 (see FIG. 1). When the brace material 15 and the second brace material 815 are connected to a connection object such as the sill support 13, the support member 870 and the cover member 722 are positioned approximately perpendicular to each other.

[0173] As described above, according to the eighth embodiment to which the present invention is applied, a support member 870 is provided that is rotatable around a second pivot shaft 823 provided on a plate portion 724, the second pivot shaft 823 is provided on the opposite side of the opening 730 from the pivot shaft 723, and a rod-shaped second brace material 815 is connected to the support member 870. According to this configuration, the second brace material 815 can be rotatably connected to the fixed member 721 via the support member 870 by utilizing the space on the opposite side of the opening 730 from the pivot shaft 723 .

[0174] [Ninth embodiment] A ninth embodiment to which the present invention is applied will be described below with reference to Figures 28 to 31. In this ninth embodiment, parts configured similarly to the seventh embodiment will be given the same reference numerals and descriptions thereof will be omitted. The ninth embodiment is different from the seventh embodiment in that the rotation of a cover member 922 is restricted by a protrusion 976.

[0175] FIG. 28 is a front view showing a ceiling structure in which a fixture 910 according to the ninth embodiment is used. A plurality of hanging bolts 12 (rod-shaped members) extend downward from a ceiling slab 11. A rod-shaped joist support 13 (ceiling member) extending horizontally is supported by a hanger 14 provided at the lower end of the hanging bolt 12. The fixture 910 is fixed to the hanging bolt 12 above the joist support 13. The fixture 910 is connected to the joist support 13 via a fall prevention wire 975.

[0176] Fig. 29 is a front view showing the fixture 910. Fig. 30 is a front view showing the fixture 910 in a state fixed to the suspension bolt 12. Fig. 31 is a perspective view showing the fixture 910 in a state fixed to the suspension bolt 12. The fall prevention wire 975 is not shown in Fig. 29. Fixing device 910 includes a fixing member 721 , a cover member 922 rotatably attached to fixing member 721 , a fall prevention wire 975 connected to cover member 922 , and a rotation shaft 723 . The fixture 910 is fixed to the suspension bolt 12 by clamping the suspension bolt 12 between the fixing member 721 and the cover member 922 .

[0177] A protruding portion 976 is fixed to the fixing hole 724c of the plate portion 724. The protruding portion 976 is inserted into the fixing hole 724c and fixed to the fixing hole 724c. The protruding portion 976 protrudes forward from the plate portion 724 in parallel with the rotation shaft 723. In detail, the protrusion 976 includes a shaft portion 976a that protrudes forward from the cover receiving surface 724a, and a head portion 976b that is provided at the front end of the shaft portion 976a. The head portion 976b has a larger diameter than the shaft portion 976a. The protrusion 976 is, for example, a bolt that is inserted into the fixing hole 724c, and fastens the outer plate portion 751 and the inner plate portion 761 together.

[0178] The cover member 922 is formed to be longer in the up-down direction than the fixed member 721. The cover member 922 includes a rotating plate portion 941 facing the cover receiving surface 724a of the plate portion 724. The cover member 922 also includes an outer rib 942a erected forward from the outer edge in the width direction of the rotating plate portion 941, and an inner rib 942b erected forward from the inner edge in the width direction of the rotating plate portion 941, when the cover member 922 is oriented in the up-down direction as shown in Fig. 29.

[0179] The cover member 922 is attached to the fixed member 721 by a rotation shaft 723 that is inserted into a rotating plate portion 941 at one end of the cover member 922 , and is rotatable about the rotation shaft 723 . A wire connection portion 977 to which one end of a fall prevention wire 975 is connected is provided on the rotating plate portion 941 at the other end of the cover member 922. The wire connection portion 977 is a hole through which one end of the fall prevention wire 975 is passed. The rear surface of the rotating plate portion 941 is a contact surface 943 (FIG. 31) that rotates while being in contact with the cover receiving surface 724a.

[0180] An engagement portion 978 penetrating the rotating plate portion 941 is provided between the wire connection portion 977 and the rotating shaft 723 in the rotating plate portion 941. The engagement portion 978 is an opening that extends from the lower end of the rotating plate portion 941 to the upper portion. Additionally, the cover member 922 has an escape hole 979 in communication with the engagement portion 978 in the outer rib 942a.

[0181] As shown in Figure 29, when the hanging bolt 12 is set in the rod-shaped member insertion portion 727 and the cover member 922 is rotated around the pivot shaft 723 as shown in Figure 31, a portion of the opening 730 is closed by the cover member 922, and the fixing device 910 is fixed to the hanging bolt 12. In this fixed state, the contact surface 943 of the cover member 922 contacts the outer periphery of the hanging bolt 12, and the hanging bolt 12 is sandwiched between the contact surface 943 and the first receiving portion 731 and the second receiving portion 732. In addition, in the fixed state, the female thread portion 730a of the opening 730 engages with the thread portion 12b.

[0182] In the above-mentioned fixed state, the cover member 922 is approximately horizontal, and the engagement portion 978 of the cover member 922 engages with the protrusion 976 from above. The protrusion 976 passes through the escape hole 979 from below and engages with the protrusion 976. Specifically, as shown in FIGS. 30 and 31, the upper edge of the engagement portion 978 abuts against the shaft portion 976a of the protrusion portion 976 from above, so that the cover member 922 is restricted from rotating downward. In addition, in the above-mentioned fixed state, the head 976b is located in front of the engaging portion 978 to restrict the forward displacement of the cover member 922 and prevent the engaging portion 978 from falling off the protruding portion 976.

[0183] The fall prevention wire 975 extends downward from the cover member 922, and the other end of the fall prevention wire 975 is connected to the soffit support 13. In Fig. 28, the fall prevention wire 975 is in a slack state. When the joist support 13 falls off the hanging bolt 12 and moves downward, the fall prevention wire 975 is pulled downward by the joist support 13 and becomes taut. The fixing device 910 supports the joist support 13 to the hanging bolt 12 via the fall prevention wire 975.

[0184] As described above, according to the ninth embodiment to which the present invention is applied, fixed member 721 includes protruding portion 976 that protrudes from cover receiving surface 724a toward cover member 922, on the opposite side of opening 730 from rotating shaft 723. When cover member 922 covers opening 730, cover member 922 engages with protruding portion 976 and is restricted from rotating. According to this configuration, the cover member 922 engages with the protrusion 976 to restrict rotation, thereby preventing the opening 730 from being opened by rotation of the cover member 922, and enabling the fixing device 910 to be firmly fixed to the hanging bolt 12.

[0185] The cover member 922 also includes an engagement portion 978 that engages with the protrusion 976 from above, and the hanging bolt 12 suspends and supports the joist support 13 below the cover member 922, and a fall prevention wire 975 is provided that connects the joist support 13 and the cover member 922. When the cover member 922 is pulled downward by the joist support 13 via the fall prevention wire 975, the protrusion 976 receives the engagement portion 978 from below, and the rotation of the cover member 922 is restricted. According to this configuration, even if the fall prevention wire 975 is activated, the rotation of the cover member 922 can be restricted by the protrusion 976, and the fixing device 910 can be firmly fixed to the hanging bolt 12.

[0186] [Tenth embodiment] A tenth embodiment to which the present invention is applied will be described below with reference to Figures 32 to 34. In this tenth embodiment, parts configured similarly to the seventh embodiment are given the same reference numerals and descriptions thereof will be omitted. The tenth embodiment differs from the seventh embodiment in that a cover member (base material 1022) different from cover member 722 is used.

[0187] FIG. 32 is a front view showing the structure of a ceiling in which a fixture 1010 according to the tenth embodiment is used. A horizontally extending rod-shaped base material 1022 is provided on the ceiling as a member from which the suspension bolt 12 is suspended. The hanging bolt 12 is suspended from the base material 1022 via the fixing member 721. A rod-shaped sill support 13 extending horizontally is supported by a hanger 14 provided at the lower end of the hanging bolt 12. For example, a fixing device 610 of the sixth embodiment (see Figure 17) is fixed to the upper part of the hanging bolt 12, and the lower end of the brace material 15 attached to the fixing device 610 is connected to the soffit support 13.

[0188] Fixture 1010 fixed to suspension bolt 12 includes fixing member 721 and base material 1022 as a cover member that is attached to fixing member 721 and that holds suspension bolt 12 between fixing member 721 and base material 1022 .

[0189] Fig. 33 is a perspective view of the fixing device 1010 as viewed from below. Fig. 34 is a view of the fixing device 1010 as viewed in the axial direction of the base material 1022. The base material 1022 is a C-shaped channel material having a C-shaped cross section. In detail, the base material 1022 includes a vertical wall portion 1022a extending vertically, a pair of horizontal wall portions 1022b extending horizontally from the upper and lower ends of the vertical wall portion 1022a, and a pair of flange wall portions 1022c folded back vertically from the ends of the horizontal wall portion 1022b.

[0190] In the tenth embodiment, a fixing member 721 includes a first receiving portion 1031 instead of the first receiving portion 731 (see FIGS. 21 and 25, etc.). The first receiving portion 1031 is configured by a first recess 765. The first receiving portion 1031 does not have a first cutout portion 755 (FIG. 22), and the portion where the first cutout portion 755 was formed is blocked by a plate portion that configures the first outer flange portion 752.

[0191] The outer fixing member 750 and the inner fixing member 760 are fastened to each other by fasteners 1023 which are inserted through the fixing hole 724c (FIG. 22) and the rotary shaft fixing hole 724b (FIG. 22), respectively. The fasteners 1023 are fixed by caulking.

[0192] The fixing member 721 is fixed to the vertical wall portion 1022a with the cover receiving surface 724a in contact with the outer surface of the vertical wall portion 1022a of the base material 1022. The outer surface of the vertical wall portion 1022a is an abutment surface 1043 that abuts against the cover receiving surface 724a. The abutment surface 1043 is a flat surface parallel to the cover receiving surface 724a. A spacer (not shown) formed of a washer or the like may be disposed between the contact surface 1043 and the cover receiving surface 724a. In this case, the contact surface 1043 contacts the cover receiving surface 724a via the spacer.

[0193] The fixing member 721 is fixed to the vertical wall portion 1022a by a fastener 1059 that is inserted from the inside of the fixing member 721 into a hole 724e (see FIG. 22). The fixing member 721 is fixed to the lower part of the vertical wall portion 1022a so that the lower surface of the second flange portion 726 is substantially flush with the lower surface of the lower horizontal wall portion 1022b.

[0194] When the fixing member 721 is fixed to the vertical wall portion 1022a, the opening 730 is closed by the vertical wall portion 1022a. As shown in FIG. 33, the second receiving portion 732 provided on the second flange portion 726 forms an opening that opens the rod-shaped member insertion portion 727 downward.

[0195] The worker can insert the hanging bolt 12 through the opening formed by the second receiving portion 732 and rotate the hanging bolt 12 to screw the threaded portion 12b into the female threaded portion 730a, thereby fixing the hanging bolt 12 and the fixing device 1010 to a fixed state. In the fixed state, the hanging bolt 12 is fastened until the upper end of the hanging bolt 12 enters the first recess 765 and abuts against the lower surface of the first outer flange portion 752. In this state, the abutment surface 1043 of the base material 1022 abuts against the outer periphery of the hanging bolt 12, and the hanging bolt 12 is sandwiched between the abutment surface 1043 and the first recess 765 and the second recess 766. In addition, the female thread portion 730a of the opening 730 is engaged with the thread portion 12b. The hanging bolt 12 and the fixture 1010 may be fixed to each other by fixing the fixing member 721, with the hanging bolt 12 set in the rod-shaped member insertion portion 727, to the vertical wall portion 1022a.

[0196] 34, the female thread portion 730a engages with the threaded portion 12b of the suspension bolt 12 at a position where the female thread portion 730a overlaps with the position of the axis 12a of the suspension bolt 12 in the direction of depth A1. Therefore, the female thread portion 730a can be effectively engaged with the threaded portion 12b.

[0197] As described above, according to the tenth embodiment to which the present invention is applied, the hanging bolt 12 can be inserted into the rod-shaped member insertion portion 727 through the opening formed by the second receiving portion 732, and the threaded portion 12b can be screwed into the female threaded portion 730a. According to this configuration, since the threaded portion 12b can be screwed into the female threaded portion 730a through the opening formed by the second receiving portion 732, the fixture 1010 can be easily attached to the hanging bolt 12.

[0198] [Eleventh embodiment] An eleventh embodiment to which the present invention is applied will be described below with reference to Figures 35 to 36. In this eleventh embodiment, parts configured similarly to the seventh embodiment will be given the same reference numerals and descriptions thereof will be omitted. The eleventh embodiment differs from the seventh embodiment in that a cover member 1122 different from the cover member 722 is used.

[0199] Fig. 35 is a side view of a ceiling structure in which a fixture 1110 according to the eleventh embodiment is used. Fig. 36 is a perspective view showing fixture 1110. The fixture 1110 includes a fixing member 721 and a cover member 1122 that is attached to the fixing member 721 and that holds the suspension bolt 12 between the fixing member 721 and the cover member 1122 . The hanging bolt 12 is attached to the base material 1022 described in the tenth embodiment above through a fastener 1110.

[0200] The cover member 1122 includes a vertical plate portion 1180 attached to the cover receiving surface 724a of the fixing member 721, and a base material engaging portion 1181 that engages with the base material 1022. The vertical plate portion 1180 is a flat plate extending vertically in parallel with the cover receiving surface 724a. The lower portion of the vertical plate portion 1180 is attached to the cover receiving surface 724a. The upper portion of the vertical plate portion 1180 extends upward beyond the fixing member 721.

[0201] The base material engaging portion 1181 includes an extending portion 1181a extending from the upper end of the vertical plate portion 1180 in the direction of the depth A1 of the first receiving portion 731, and a groove portion 1181b formed by cutting the base end of the extending portion 1181a upward from the lower edge. The base material engaging portions 1181 are provided at one end and the other end of the vertical plate portion 1180 in the width direction. The rod-shaped member insertion portion 727 is disposed between a pair of base material engagement portions 1181. The base material engagement portions 1181 are located above the first flange portion 725.

[0202] The cover member 1122 is fixed to the fixing member 721 by a fastener 1123a that is inserted into a hole (not shown) of the vertical plate portion 1180 and the rotation shaft fixing hole 724b (FIG. 22). Moreover, the cover member 1122 is fixed to the fixing member 721 by a fastener 1123b that is inserted through a hole (not shown) of the vertical plate portion 1180 and the rotation shaft fixing hole 724b (FIG. 22). The fastener 1123b is fixed by caulking.

[0203] The vertical plate portion 1180 has a contact surface 1143 that contacts the cover receiving surface 724a. The contact surface 1143 is a flat surface parallel to the cover receiving surface 724a.

[0204] When the cover member 1122 is fixed to the fixing member 721 , the opening 730 is closed by the vertical plate portion 1180 . As shown in FIG. 36, the second receiving portion 732 provided on the second flange portion 726 forms an opening that opens the rod-shaped member insertion portion 727 downward.

[0205] Here, an example of a procedure for attaching the hanging bolt 12 and the fastener 1110 will be described. In the state shown in FIG. 36, the worker inserts the suspension bolt 12 from the opening formed by the second receiving portion 732, and rotates the suspension bolt 12 to screw the threaded portion 12b into the female threaded portion 730a. Next, the worker engages the groove 1181b of the base material engagement portion 1181 with the lower flange wall portion 1022c of the base material 1022, as shown in FIG. Then, the hanging bolt 12 is further tightened to bring the upper end of the hanging bolt 12 into contact with the lower surface of the lower lateral wall portion 1022b. This allows the groove portion 1181b to be pressed against the flange wall portion 1022c from above, and the base material engagement portion 1181 can be firmly engaged with the flange wall portion 1022c.

[0206] In a fixed state in which the hanging bolt 12 and the fixture 1110 are fixed, the contact surface 1143 of the cover member 1122 contacts the outer periphery of the hanging bolt 12. In this fixed state, the hanging bolt 12 is sandwiched between the contact surface 1143 and the first recess 765 and the second recess 766, and the female threaded portion 730a of the opening 730 is engaged with the threaded portion 12b. The hanging bolt 12 and the fixture 1110 may be fixed to each other by fixing the fixing member 721 with the hanging bolt 12 set in the rod-shaped member insertion portion 727 to the cover member 1122 .

[0207] 35, the female thread portion 730a engages with the threaded portion 12b of the suspension bolt 12 at a position where the female thread portion 730a overlaps with the position of the axis 12a of the suspension bolt 12 in the direction of depth A1. Therefore, the female thread portion 730a can be effectively engaged with the threaded portion 12b.

[0208] As described above, according to the eleventh embodiment to which the present invention is applied, the hanging bolt 12 can be inserted into the rod-shaped member insertion portion 727 through the opening formed by the second receiving portion 732, and the threaded portion 12b can be screwed into the female threaded portion 730a. According to this configuration, since the threaded portion 12b can be screwed into the female threaded portion 730a through the opening formed by the second receiving portion 732, the fixing device 1110 can be easily attached to the hanging bolt 12. Alternatively, the suspension bolt 12 may be inserted into the rod-shaped member insertion portion 727 from the opening formed by the first receiving portion 731, and the threaded portion 12b may be screwed into the female threaded portion 730a.

[0209] [Twelfth embodiment] A twelfth embodiment to which the present invention is applied will now be described with reference to FIGS.

[0210] Fig. 37 is a front view showing the fixture 1210 in the twelfth embodiment in a state where it is fixed to the hanging bolt 12. Fig. 38 is an exploded perspective view of the fixture 1210. Fig. 39 is a plan view of the fixture 1210 in a state where it is fixed to the hanging bolt 12, viewed from above.

[0211] The fixture 1210 is fixed to, for example, the lower end of the suspension bolt 12 shown in Fig. 1. The brace material 15 connected to the fixture 1210 extends obliquely upward and is connected to another suspension bolt 12.

[0212] The fixture 1210 includes a fixing member 1221 that engages with the hanging bolt 12, a cover member 1222 that is attached to the fixing member 1221 and holds the hanging bolt 12 between the fixing member 1221, a brace support member 1290 that supports the brace material 15, and a shaft member 1223 that rotatably supports the brace support member 1290. The shaft member 1223 is formed of, for example, a bolt and a nut. In detail, the fixed member 1221 and the cover member 1222 are the same part. The cover member 1222 is attached to one fixed member 1221 by inverting the orientation of the other fixed member (cover member 1222) with respect to the other fixed member 1221. Portions of the fixed member 1221 and the cover member 1222 that have the same shape will be described with the same reference numerals. 37 to 39, the fixing member 1221 on the rear side is the fixing member, and the fixing member on the front side is the cover member 1222. In FIG.

[0213] The fixing member 1221 comprises a plate portion 1224 extending in the axial direction of the hanging bolt 12 parallel to the hanging bolt 12, a first flange portion 1225 extending from one end (upper end) of the plate portion 1224, a second flange portion 1226 extending from the other end (lower end) of the plate portion 1224, and a rod-shaped member insertion portion 1227 through which the hanging bolt 12 is inserted.

[0214] The plate portion 1224 is a substantially rectangular flat plate when viewed from the front perpendicular to the axis 12a of the hanging bolt 12 (see FIG. 37). One surface of the plate portion 1224 in the plate thickness direction is a receiving surface 1224 a that receives the cover member 1222 . The plate portion 1224 is provided with a pair of fixing holes 1224b (FIG. 38) that penetrate the plate portion 1224 in the plate thickness direction. The fixing member 1221 and the cover member 1222 are fixed together by a shaft member 1223 inserted into each of the fixing holes 1224b.

[0215] The first flange portion 1225 and the second flange portion 1226 extend in a direction substantially perpendicular to the plate portion 1224 in the opposite direction to the receiving surface 1224a side. The first flange portion 1225 and the second flange portion 1226 face each other and are disposed parallel to each other.

[0216] 37, when viewed in a direction perpendicular to the receiving surface 1224a, the first flange portion 1225 and the second flange portion 1226 are perpendicular to the axis 12a of the suspension bolt 12. In other words, the first flange portion 1225 and the second flange portion 1226 are disposed substantially horizontally.

[0217] The rod-shaped member insertion portion 1227 includes an opening 1230 formed by cutting out the plate portion 1224 along the hanging bolt 12 arranged in the rod-shaped member insertion portion 1227, a first receiving portion 1231 formed by cutting out the first flange portion 1225 in a concave shape from the plate portion 1224 side, and a second receiving portion 1232 formed by cutting out the second flange portion 1226 in a concave shape from the plate portion 1224 side.

[0218] The opening 1230 is a vertically long opening that continues from the upper end to the lower end of the plate portion 1224 along the hanging bolt 12. The opening 1230 is disposed in the center of the fixing member 1221 in the width direction (left-right direction). Here, the up-down direction of the fixture 1210 coincides with the axial direction of the hanging bolt 12. The left-right direction, which coincides with the width direction of the fixing member 1221, is a direction perpendicular to the axis 12a and the axial direction of the shaft member 1223, and the front-rear direction of the fixing member 1221 is the axial direction of the shaft member 1223.

[0219] 37 to 39, the opening 1230 has a pair of edges that sandwich the hanging bolt 12 from both radially outer sides in a front view, and these edges are formed with a female thread portion 1230a that sandwiches the hanging bolt 12 from both radially outer sides. The width of the female thread portion 1230a is slightly larger than the diameter of the hanging bolt 12. The hanging bolt 12 has a threaded portion 12b formed on the outer periphery over the entire length of the hanging bolt 12. When the hanging bolt 12 is placed in the rod-shaped member insertion portion 1227, the female threaded portion 1230a engages with the threaded portion 12b. The female thread portion 1230 a extends in the axial direction of the hanging bolt 12 between the first receiving portion 1231 and the second receiving portion 1232 .

[0220] The first receiving portion 1231 is a substantially rectangular cutout when viewed from above, and a bottom portion 1232a of the first receiving portion 1231 is substantially parallel to the receiving surface 1224a. The first receiving portion 1231 communicates with the upper end of the opening 1230. The width of the first receiving portion 1231 is larger than the diameter of the hanging bolt 12 . As shown in FIG. 39, the depth A2 of the bottom 1231a of the first receiving portion 1231 from the receiving surface 1224a is set to half the diameter of the hanging bolt 12.

[0221] The second receiving portion 1232 is a substantially rectangular cutout when viewed from above, and a bottom portion 1232a of the second receiving portion 1232 is substantially parallel to the receiving surface 1224a. The second receiving portion 1232 communicates with the lower end of the opening 1230. The width of the second receiving portion 1232 is larger than the diameter of the hanging bolt 12 .

[0222] The depth A2 of the bottom 1232a of the second receiving portion 1232 from the receiving surface 1224a (see the depth A2 of the bottom 1231a in FIG. 39) is set to half the diameter of the suspension bolt 12.

[0223] Fixture 1210 has cutout portions 1291 at one end of first flange portion 1225 and second flange portion 1226 in the width direction of fixture 1210. At cutout portions 1291, first flange portion 1225 and second flange portion 1226 are entirely cut out in the extension direction.

[0224] In front view, a pair of shaft members 1223 are provided on the left and right sides so as to sandwich an opening 1230 therebetween.

[0225] The surface of the plate portion 1224 opposite the receiving surface 1224a is an inner surface 1224c to which the brace support member 1290 is attached. A plate-shaped brace support member 1290 is rotatably supported by a shaft member 1223, and rotates along the inner surface 1224c. The brace support member 1290 is supported by the shaft member 1223 located on the side where the cutout portion 1291 is provided, out of the pair of left and right shaft members 1223. By providing the cutout portion 1291, the distance between the brace support member 1290 and the first flange portion 1225 and the second flange portion 1226 can be secured, and a large rotation range of the brace support member 1290 can be secured.

[0226] The fixing member 1221 and the cover member 1222 are arranged so that their receiving surfaces 1224a abut against each other and so that the rod-shaped member insertion portion 1227 of the fixing member 1221 and the rod-shaped member insertion portion 1227 of the cover member 1222 mate with each other, and are fastened together by the shaft member 1223. In detail, the cover member 1222 is arranged by rotating the fixing member 1221 around the hanging bolt 12 by 180 degrees. In this manner, when the fixing member 1221 and the cover member 1222 are connected together, the brace support member 1290 and the cutout portion 1291 are located on the left end side on the fixing member 1221 side, and the brace support member 1290 and the cutout portion 1291 are located on the right end side on the cover member 1222 side.

[0227] In the above-mentioned connected state, the depth A2 on the fixing member 1221 side and the depth A2 on the cover member 1222 side are aligned as shown in Fig. 39. As a result, the distance between the pair of opposing first receiving portions 1231 and the distance between the pair of opposing second receiving portions 1232 become equal to the diameter of the suspension bolt 12. Furthermore, in the above-mentioned joined state, the female thread portion 1230a of the fixing member 1221 and the female thread portion 1230a of the cover member 1222 are mated, so that the thickness of the female thread portion 1230a in the plate thickness direction increases.

[0228] When fixing the fixture 1210 to the hanging bolt 12, the hanging bolt 12 is sandwiched between the fixing member 1221 and the cover member 1222, and the shaft member 1223 is fastened. In this manner, in a fixed state in which the fixture 1210 is fixed to the hanging bolt 12, the hanging bolt 12 is sandwiched between a pair of first receiving portions 1231 and a pair of second receiving portions 1232, and the female threaded portion 1230a of the opening 1230 is engaged with the threaded portion 12b. In addition, in the direction of the depth A2, the position of the female thread portion 1230a and the position of the axis 12a of the hanging bolt 12 overlap each other. In addition, the hanging bolt 12 may be inserted from the opening formed by the second receiving portion 1232 or the opening formed by the first receiving portion 1231, and the hanging bolt 12 may be rotated to screw the threaded portion 12b into the female threaded portion 1230a.

[0229] As described above, according to the twelfth embodiment to which the present invention is applied, the fixture 1210 includes a fixing member 1221 that engages with the hanging bolt 12, and a cover member 1222 that is attached to the fixing member 1221 and holds the hanging bolt 12 between the fixing member 1221 and the cover member 1222. The fixing member 1221 includes a plate portion 1224 that extends in the axial direction of the hanging bolt 12, a first flange portion 1225 that extends from the plate portion 1224, a second flange portion 1226 that extends from the plate portion 1224 at a position separated from the first flange portion 1225 in the axial direction of the hanging bolt 12, and a rod-shaped member insertion portion 1227 through which the hanging bolt 12 is inserted. The rod-shaped member insertion portion 1227 includes an opening 1230 formed by cutting out the plate portion 1224 along the hanging bolt 12, a first receiving portion 1231 formed by cutting out the first flange portion 1225 in a concave shape from the plate portion 1224 side, and a second receiving portion 1232 formed by cutting out the second flange portion 1226 in a concave shape from the plate portion 1224 side. A female thread portion 1230a is formed on the edge of the opening 1230 to sandwich the hanging bolt 12 from both radially outer sides, and the hanging bolt 12 sandwiched between the fixing member 1221 and the cover member 1222 abuts against the first receiving portion 1231 and the second receiving portion 1232, and the thread portion 12b on the outer periphery of the hanging bolt 12 engages with the female thread portion 1230a. According to this configuration, the first flange portion 1225 and the second flange portion 1226 extending from the plate portion 1224 function as reinforcing ribs for the plate portion 1224, thereby increasing the rigidity of the fixing member 1221 and suppressing deformation of the fixing member 1221 due to an external force. Furthermore, the hanging bolt 12 can be received by the first receiving portion 1231 and the second receiving portion 1232 provided by utilizing the first flange portion 1225 and the second flange portion 1226, and the threaded portion 12b of the hanging bolt 12 engages with the female threaded portion 1230a provided in the opening 1230 cut out of the plate portion 1224, so that the fixture 1210 can be firmly fixed to the hanging bolt 12 with a simple structure.

[0230] Although one embodiment of the present invention has been described above, the present invention is not limited to the specific embodiment, and various modifications and changes are possible within the scope of the spirit of the present invention described in the claims unless otherwise specifically limited in the above description. For example, the configuration of the above-mentioned embodiment can be appropriately added or deleted, and the configuration of one embodiment can be applied to another embodiment. Furthermore, the effects of the above-mentioned embodiment are merely examples of the effects resulting from the present invention, and do not mean that the effects of the present invention are limited to the above-mentioned effects. [Explanation of symbols]

[0231] 10: Fixtures 12, 212a, 312a: Hanging bolt (first rod-shaped member) 12a: Axis 12b: Threaded part 15: Brace material (second rod-shaped member) 21,421,471,481,521: Fixing material 22, 222, 252, 322: Movable parts 23: Rotating shaft 24: Board part 24a: Outer surface (plate surface of plate part) 25: First flange portion 26: Second flange portion 27: Rod-shaped member insertion part 30: Opening 31: First engagement portion 32: Second engagement portion 33: One end 33a: One end side contact surface 34: Other end 34a: Other end side contact surface 35: First Rib 36: Second Rib 37: Inner wall 43: Contact part 43a: Notch 44: Mounting part 210: Second Fixture (Fixture) 215a: Upper brace material (second rod-shaped member) 215b: Lower brace material (second rod-shaped member) 310a, 310e: Third fixture (fixture) 315a: First brace material (second rod-shaped member) 315b: Second brace material (first rod-shaped member) D: Distance L: Lead angle P: Pitch R: Orthogonal line θ: Tilt angle 12: Hanging bolt (rod-shaped component) 13: Ceiling support (ceiling component) 610,710,810,910,1010,1110,1210: Fixture 621, 721, 1221: Fixing material 622, 722, 922, 1122, 1222: Cover parts 623,723: Rotating shaft 624,724,1224: Board part 624a, 724a: Cover receiving surface 625, 725, 1225: First flange part 626, 726, 1226: Second flange part 627, 727, 1227: Rod-shaped member insertion part 630,730,1230:Aperture 630a, 730a, 1230a: Female thread 631, 731, 1031, 1231: First receiving part 632, 732, 1232: Second receiving part 643,743,1043,1143: Contact surface 644,744: Mounting part 650,750:Outer fixing member 654,754:Outside opening 660, 760: Inner fixing member 815: Second brace material 823: Second rotation axis 870: Support member 975: Fall prevention wire 976:Protrusion 978: Engagement part 1022: Base material (cover material) A, A1: Depth

Claims

1. A fastener for fastening a second rod-shaped member to a first rod-shaped member, a fixed member fixed to the first rod-shaped member, and a movable member rotatably attached to the fixed member and to which the second rod-shaped member is fixed, the fixing member includes a plate portion extending in an axial direction of the first rod-shaped member, a first flange portion extending from one end of the plate portion, a second flange portion extending from the other end of the plate portion, and a rod-shaped member insertion portion through which the first rod-shaped member is inserted, the rod-shaped member insertion portion includes an opening for exposing the first rod-shaped member disposed in the rod-shaped member insertion portion in a surface direction of the plate portion, a first engagement portion provided on the first flange portion and engaging with the first rod-shaped member, and a second engagement portion provided on the second flange portion and engaging with the first rod-shaped member, the movable member is capable of rotating about a rotation axis provided on the plate portion to open and close the opening, A fixing device in which, when the movable member covers the opening, the first rod-shaped member is sandwiched between the first engagement portion and the second engagement portion and the movable member.

2. the first rod-shaped member is a bolt, the first engaging portion and the second engaging portion are arc-shaped recesses along an outer periphery of the first rod-shaped member, 2. The fastener according to claim 1, wherein the distance between the first engagement portion and the second engagement portion is an integer multiple of the pitch of the threaded portion of the first rod-shaped member.

3. When viewed in a direction perpendicular to a plate surface of the plate portion, the first flange portion and the second flange portion are disposed at an inclination angle with respect to an orthogonal line perpendicular to an axis of the first rod-shaped member, The fastener according to claim 2 , wherein the inclination angle is set in accordance with a lead angle of the threaded portion.

4. The first engaging portion and the second engaging portion each have one end and the other end of the arc shape, the one end includes a one-end abutment surface that abuts against the threaded portion in an axial direction of the first rod-shaped member, the other end includes an other end abutment surface that abuts against the threaded portion on the opposite side to the one end abutment surface in the axial direction of the first rod-shaped member, The fastener according to claim 3 , wherein the inclination angle is set to an angle at which both the one end side contact surface and the other end side contact surface simultaneously contact the threaded portion.

5. 5. The fastener according to claim 1, further comprising at least one of a first rib extending from an end of the first flange portion opposite the plate portion toward the second flange portion, and a second rib extending from an end of the second flange portion opposite the plate portion toward the first flange portion.

6. The fixture according to claim 1 , wherein the fixing member includes an inner wall portion extending from an edge of the opening along an outer periphery of the first rod-shaped member toward the inside of the rod-shaped member insertion portion.

7. the movable member includes a contact portion that rotates while in contact with the fixed member, and a mounting portion that extends outward from the fixed member relative to the contact portion and to which the second rod-shaped member is attached; 5. The fixture according to claim 1, wherein a notch is provided at an end of the abutting portion opposite the mounting portion such that the abutting portion becomes smaller in size in the longitudinal direction.

8. A fixture fixed to a rod-shaped member, a fixing member that engages with the rod-shaped member; and a cover member that is attached to the fixing member and that sandwiches the rod-shaped member between the fixing member and the cover member, the fixing member includes a plate portion extending in an axial direction of the rod-shaped member, a first flange portion extending from the plate portion, a second flange portion extending from the plate portion at a position spaced apart from the first flange portion in the axial direction of the rod-shaped member, and a rod-shaped member insertion portion through which the rod-shaped member is inserted, the rod-shaped member insertion portion includes an opening formed by cutting out the plate portion along the rod-shaped member, a first receiving portion formed by cutting out the first flange portion from the plate portion side in a concave shape, and a second receiving portion formed by cutting out the second flange portion from the plate portion side in a concave shape, A female screw portion is formed on the edge of the opening portion to sandwich the rod-shaped member from both radially outer sides, A fixing device in which the rod-shaped member clamped between the fixing member and the cover member abuts against the first receiving portion and the second receiving portion, and the threaded portion on the outer periphery of the rod-shaped member engages with the female threaded portion.

9. The cover member includes an abutment surface that abuts against an outer circumferential surface of the rod-shaped member and the plate portion, and the plate portion includes a cover receiving surface that receives the abutment surface, a depth of the first receiving portion and the second receiving portion from the cover receiving surface is set to be equal to a diameter of the rod-shaped member, The fastener according to claim 8 , wherein the female thread portion is provided at a position spaced from the cover receiving surface in a depth direction of the first receiving portion and the second receiving portion.

10. The fixture according to claim 9 , wherein the position of the female threaded portion overlaps with the position of the axis of the rod-shaped member in the depth direction.

11. The fixing member includes an outer fixing member having the cover receiving surface and an inner fixing member having the female thread portion, The fixture according to claim 9 , wherein the inner fixing member is attached to the outer fixing member such that the female thread portion is exposed from an outer opening provided in the cover receiving surface.

12. The cover member is capable of rotating around a rotation axis provided on the plate portion to open and close the opening, The fixture according to claim 9 , wherein when the cover member covers the opening, the rod-shaped member is sandwiched between the first receiving portion, the second receiving portion and the cover member.

13. The fastener according to claim 12 , wherein the cover member includes an attachment portion to which a rod-shaped brace material is connected.

14. a support member is provided that is rotatable about a second rotation axis provided on the plate portion, The second rotation shaft is provided on the opposite side of the opening to the rotation shaft, The fixture of claim 13 , further comprising a rod-shaped second brace member connected to the support member.

15. the fixing member includes a protruding portion protruding from the cover receiving surface toward the cover member on a side opposite to the pivot shaft across the opening, The fixture according to claim 12 , wherein the cover member is engaged with the protrusion and is prevented from rotating when the cover member covers the opening.

16. the cover member includes an engagement portion that engages with the protrusion from above, The rod-shaped member suspends and supports a ceiling member below the cover member, a fall prevention wire is provided connecting the ceiling member and the cover member; The fixture according to claim 15, wherein when the cover member is pulled downward by the ceiling member via the fall prevention wire, the protrusion receives the engagement portion from below, thereby restricting rotation of the cover member.

17. 12. The fastener according to claim 8, wherein the rod-shaped member can be inserted into the rod-shaped member insertion portion through an opening formed by at least one of the first receiving portion and the second receiving portion, and the threaded portion can be screwed into the female threaded portion.

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