Anti-rotation device for bolts used in mounting brackets for building panels and mounting structure for building panels

Abstract

To provide an anti-rotation fixture that is easy to install on site and can properly prevent the rotation of bolts for attachment metal hardware after installation of building panels.SOLUTION: An embodiment of the present invention comprises: a body portion that has an opening having a predetermined thickness and equipped with a retaining edge that engages two parallel sides of a head of a bolt for attachment metal hardware; a rising portion protruding from one face of the body portion in the direction of the thickness of the opening; and an engaging portion provided in the rising portion.SELECTED DRAWING: Figure 1

Description

[[Technical Field]]

[0001] The present application relates to an anti-rotation device for mounting bracket bolts that fixes a mounting bracket to a building panel, and a mounting structure for a building panel using the same. [[Background Art]]

[0002] Conventionally, building panels are constructed by attaching a mounting bracket to the inner surface with bolts, and sandwiching a base material of a building frame between the building panel and the mounting bracket. Examples of building panels include extruded cement boards, lightweight aerated concrete boards, precast concrete boards, etc. In the following description, an extruded cement board will be taken as an example for explanation.

[0003] When attaching an extruded cement board to the base material of a building frame, bolt insertion holes reaching the hollow portion are opened on the back side of the extruded cement board. Then, a square nut is inserted into the hollow portion, and a mounting bracket bolt, which has a Z-clip (the mounting bracket) inserted into the bolt insertion hole from the back side of the panel, is screwed into the square nut for attachment. Then, the extruded cement board clamps the base material with the Z-clip and is fixed to the base material. At this time, the mounting bracket bolt for attaching the Z-clip to the extruded cement board is tightened with a predetermined torque. A mounting bracket bolt tightened with a predetermined torque is unlikely to loosen under normal conditions.

[0004] As prior art for preventing loosening of a molded plate mounting bracket, for example, there is a structure in which anti-rotation pieces are provided on both sides of the mounting bracket, and the anti-rotation pieces are arranged facing the ends of a base angle to prevent the mounting bracket from rotating around the bolt (see, for example, Patent Document 1). In this structure, it is necessary to use a dedicated mounting bracket for attaching the molded plate, and it cannot be attached after the molded plate is constructed.

[0005] Furthermore, another prior art involves attaching an anti-rotation plate between the base angle and the molded plate, and preventing the rotation of the Z-clip (mounting bracket) by an anti-rotation piece on this anti-rotation plate (see, for example, Patent Document 2). In this structure, the anti-rotation plate must be attached when the molded plate is installed, and it cannot be attached after construction. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 10-046721 [Patent Document 2] Japanese Patent Publication No. 2003-074166 [Overview of the Initiative] [Problems that the invention aims to solve]

[0007] Incidentally, when attaching extruded cement boards to a substrate, depending on the structure of the substrate at the attachment point, it may be necessary to tighten the Z-clip to a torque value lower than the specified torque value. However, if the Z-clip is attached to the extruded cement board with a torque value lower than the specified torque value, there is a risk that the bolt will loosen after installation and the specified torque value cannot be maintained. Furthermore, changes in the bolt tightening torque value can occur not only due to the displacement of the extruded cement board causing the bolt to rotate in the direction of loosening and thus decrease the torque value, but also due to the bolt rotating in the direction of tightening and thus increasing the torque value.

[0008] Furthermore, while Patent Documents 1 and 2 mentioned above are fittings that prevent the bolts for the mounting bracket from loosening by preventing the rotation of the Z-clip, neither can be installed after the molded plate has been constructed, making them difficult to adopt due to on-site workability.

[0009] Therefore, the purpose of this application is to provide a rotation prevention device that offers good on-site workability and can appropriately prevent the rotation of mounting bolts after the installation of building panels, and a building panel mounting structure using the same. [Means for solving the problem]

[0010] A rotation prevention device for a mounting bracket bolt according to one aspect of this application comprises a main body having a predetermined thickness and an opening with retaining sides that engage with two parallel sides of the head of the mounting bracket bolt, a rising portion protruding from one side of the main body in the thickness direction of the opening, and a locking portion provided on the rising portion.

[0011] With this configuration, by inserting the bolt head for the mounting bracket into the opening of the main body, the retaining edge of the opening engages with the bolt head. Then, by engaging a connecting member or the like with the locking part of the rising section to maintain its position, rotation of the mounting bracket bolt can be prevented. Therefore, the mounting bracket bolt, which has been tightened to a predetermined torque, can maintain its tightened state appropriately.

[0012] Furthermore, a rotation prevention device for bolts for building panel mounting brackets according to another embodiment comprises a main body member having a predetermined thickness and an opening with retaining sides that engage with two parallel sides of the head of the mounting bracket bolt; a locking member having a rising portion that protrudes from one side of the main body member in the thickness direction of the opening; and a locking portion provided on the rising portion of the locking member.

[0013] With this configuration, the head of the mounting bracket bolt is inserted into the opening of the main body member, causing the retaining edge of the opening to engage with the head of the mounting bracket bolt. Then, by engaging a connecting member or the like with the locking part of the rising section to maintain its position, the rotation of the mounting bracket bolt can be prevented. Therefore, the mounting bracket bolt, which has been tightened to a predetermined torque, can maintain its tightened state appropriately. In addition, by combining the main body member with the opening and the locking member with the rising section as separate components, costs can be reduced compared to when they are constructed as a single unit.

[0014] Furthermore, the device may have a retaining portion that protrudes toward the space of the opening from a position perpendicular to the retaining edge of the opening and is held by the mounting bracket bolt. With this configuration, the anti-rotation device can be held in place at the mounting bracket bolt by holding the retaining portion with the mounting bracket bolt.

[0015] Furthermore, the retaining parts may be provided at positions opposite each other to the opening. With this configuration, the retaining parts provided at positions opposite each other to the opening can be held in place by bolts for the mounting bracket.

[0016] Furthermore, the opening may extend to the outer circumference of the main body or main body member at a position different from the position of the rising portion of the main body or main body member. With this configuration, the anti-rotation device can be inserted through the opening into the head of the mounting bracket bolt attached to the building panel, making it easy to attach the anti-rotation device and improving work efficiency.

[0017] On the other hand, a mounting structure for a building panel according to one aspect of this application includes a main body having a predetermined thickness and an opening with retaining sides that engage with two parallel sides of the head of a mounting bracket bolt, a rising portion protruding from the main body in the thickness direction of the opening, and a locking portion provided on the rising portion. The anti-rotation device is attached to the head of the mounting bracket bolt of the building panel, and the end of a connecting member that is locked to the locking portion is fixed to prevent the anti-rotation device from rotating. With this configuration, by inserting the bolt head for the mounting bracket into the opening of the main body, the retaining edge of the opening engages with the bolt head. Then, by fixing the connecting member that is locked to the locking part of the rising section, the position of the anti-rotation device is maintained, thus preventing the mounting bracket bolt from rotating. Therefore, the mounting bracket bolt, which has been tightened to a predetermined torque, can properly maintain its tightened state. For example, even if the mounting bracket bolt is tightened to a torque lower than the predetermined torque, that torque can be maintained after the building panel is installed.

[0018] Further, the rotation prevention tools may be respectively attached to heads of the plurality of bolts for mounting bracket, and the respective locking portions may be connected by the connecting member locked to the locking portions of the plurality of rotation prevention tools to prevent rotation of the rotation prevention tools. With this configuration, the connecting member that connects the locking portions of the plurality of rotation prevention tools allows the plurality of rotation prevention tools to integrally prevent rotation of the bolt for mounting bracket. [Effects of the Invention]

[0019] According to the present application, on-site workability is good, and it becomes possible to appropriately prevent rotation of the bolt for mounting bracket after the architectural panel is attached. [Brief Description of Drawings]

[0020] [Figure 1] FIG. 1 is a perspective view showing a first rotation prevention tool according to a first embodiment of the present application. [Figure 2] FIG. 2 is a front view of the first rotation prevention tool shown in FIG. 1. [Figure 3] FIG. 3 is a cross-sectional view taken along line III-III shown in FIG. 2. [Figure 4] FIG. 4 is a side view showing a partially modified example of the first rotation prevention tool shown in FIG. 1. [Figure 5] FIG. 5 is a cross-sectional view showing an attached state of the first rotation prevention tool shown in FIG. 1. [Figure 6] FIG. 6 is a perspective view showing an example of an attachment structure for an architectural panel according to the present application. [Figure 7] FIG. 7 is a drawing showing another example of the connecting member in the attachment structure shown in FIG. 6, wherein (A) is an exploded view showing a part of the connecting member, and (B) is a front view of a connected state of the connecting member as viewed from the inner side of the architectural panel. [Figure 8] FIGS. 8(A) to 8(E) are front views showing other embodiments of the rotation prevention tool according to the present application. [Mode for Carrying Out the Invention]

[0021] Hereinafter, one embodiment of this application will be described with reference to the drawings. In the following embodiment, the first anti-rotation device 1 used for an extruded cement board 100, which is a building panel, will be mainly described as an example. Furthermore, the mounting structure 40 for the building panel will be described in an example in which the anti-rotation device 1 is used on the bolts 102 for the mounting bracket of the extruded cement board 100 installed vertically. In this specification and the claims, the direction of the surface of the extruded cement board 100 is referred to as "outward," and the direction of the back surface is referred to as "inward."

[0022] <Configuration of the anti-rotation device> Figure 1 is a perspective view showing the first anti-rotation device 1 according to the first embodiment. Figure 2 is a front view of the first anti-rotation device 1 shown in Figure 1. Figure 3 is a cross-sectional view taken along the line III-III shown in Figure 2.

[0023] As shown in Figures 1 and 2, the first anti-rotation device 1 of this embodiment comprises a main body member 10 having an opening 11 with two retaining sides 12 that engage with two parallel sides of the head 103 of the mounting bracket bolt 102. The first anti-rotation device 1 also comprises a locking member 20 having a rising portion 21 that protrudes from one side of the main body member 10 in the thickness direction of the opening 11. The mounting bracket bolt 102 is a hexagonal bolt, and its head 103 is formed in a hexagonal shape.

[0024] The opening 11 of the main body member 10 is formed with a width dimension W1 shown in the figure that is slightly larger than the parallel two-sided width dimension B1 of the head 103 of the mounting bracket bolt 102. The opening 11 is formed with a vertical dimension W2 that is larger than the dimension B2 in the direction perpendicular to the two parallel sides of the head 103. In this example, dimension W2 is such that a retaining portion 23, which will be described later, can be provided in addition to dimension B2. In this example, the rising portion 21 is parallel to the retaining edge 12 of the main body member 10. The main body member 10 is a member having a predetermined thickness W3, and the locking member 20 is a thin plate member. The thickness W3 of the main body member 10 is such that it can engage with the head 103 of the mounting bracket bolt 102 to stop rotation.

[0025] In this embodiment, the first anti-rotation device 1 is formed by manufacturing the main body member 10 and the locking member 20 as separate components and combining them. By making the main body member 10 and the locking member 20 as separate components, the main body member 10 can be efficiently manufactured from a thick metal, and the locking member 20 can be efficiently manufactured from a thin metal, thereby enabling efficient manufacturing of the first anti-rotation device 1. For example, the main body member 10 can have a thickness W3 of about 2 mm to 5 mm, but it is desirable that the thickness be such that when attached to the bolt head, there is a portion of the bolt head that can be tightened with the jaw of a wrench or the like. The locking member 20 can have a thickness of about 0.1 mm to 0.6 mm. Alternatively, the main body member 10 can be manufactured from resin and the locking member 20 from metal and then combined. The first anti-rotation device 1 can be manufactured from metal such as iron or stainless steel, or from resin.

[0026] In this embodiment, the main body member 10 is provided with a flat portion 13 parallel to the holding edge 12 of the opening 11. The flat portion 13 is provided on the outer circumference of the main body member 10, and by bending the raised portion 21 provided on the thin plate locking member 20 along the flat portion 13, the raised portion 21 protrudes in the thickness direction of the main body member 10. In this way, the main body member 10 and the locking member 20 are combined. As shown in Figure 3, the flat portion 13 of the main body member 10 is formed to be slightly recessed compared to the outer surface of the main body member 10. By bending the raised portion 21 of the locking member 20 along the flat portion 13, the raised portion 21 becomes aligned with the main body member 10, forming an integrated first anti-rotation device 1.

[0027] As also shown in Figures 1 and 2, the locking member 20 has a through-hole 22, which serves as a locking portion, at the top of the rising portion 21. The through-hole 22 is provided from the outside of the main body member 10 at a height H1 that is higher than the thickness B3 of the head 103 of the mounting bracket bolt 102. The rising portion 21 is formed at a height that allows the through-hole 22 to be provided at a height H1. As will be described later, a connecting member 30 (for example, a wire) for connecting with other first anti-rotation devices 1, etc., is attached to the through-hole 22.

[0028] Furthermore, as shown in Figures 1 and 2, the locking member 20 is provided with a retaining portion 23 that protrudes toward the opening 11 of the main body member 10. The retaining portion 23 is provided at two locations in a direction perpendicular to the retaining edge 12 provided on the opening 11 of the main body member 10. Of the two retaining portions 23, the first retaining portion 23A protrudes with a dimension P1 that is large in amount to the opening 11, while the second retaining portion 23B protrudes with a dimension P2 that is shorter than that of the first retaining portion 23A. In the figures, the upper part is the first retaining portion 23A and the lower part is the second retaining portion 23B. The dimension P3 between the first retaining portion 23A and the second retaining portion 23B is smaller than the dimension B2 of the head 103 of the mounting bracket bolt 102 described above by the difference between the dimension P1 of the first retaining portion 23A and the dimension P2 of the second retaining portion 23B. As will be described later, the first retaining portion 23A is sandwiched between the head 103 of the mounting bracket bolt 102 and the spring washer 104. The first anti-rotation device 1 maintains its holding state by sandwiching the first retaining portion 23A between the head 103 and the spring washer 104.

[0029] The first anti-rotation device 1 may also be configured by integrally forming a main body portion corresponding to the main body member 10 and a rising portion 21 provided on the locking member 20. Furthermore, the main body member 10 is not limited to having a circular shape when viewed from the front, as in this embodiment. The main body member 10 may have a rectangular or polygonal shape when viewed from the front.

[0030] <Partial modification of the anti-rotation device> Figure 4 is a side view showing a modified version of the first anti-rotation device 1 shown in Figure 1. In this example, the raised portion 21 of the locking member 20 differs from the first anti-rotation device 1 described above. Components identical to those in Figure 2 are denoted by the same reference numerals, and their descriptions are omitted. In this example, the raised portion 21 is provided with a locking groove 25 as a locking part. Similar to the through hole 22, a connecting member 30 (for example, a wire) for connecting to other first anti-rotation devices 1 is attached to this locking groove 25. In addition, the raised portion 21 is provided with a cut-off portion 26 at the corner in the direction of the second holding portion 23B. Since the second holding portion 23B is formed shorter than the first holding portion 23A, the cut-off portion 26 is provided so that the direction of the second holding portion 23B can be easily recognized by the operator. In this example, it can be easily determined that the first anti-rotation device 1 is installed such that the first retaining portion 23A is positioned above the head 103 of the mounting bracket bolt 102, and the second retaining portion 23B is positioned below the head 103. The first anti-rotation device 1 can also be configured by combining the configuration shown in Figure 4 and the configuration shown in Figure 2.

[0031] <Installation status of the anti-rotation device> Figure 5 is a cross-sectional view showing the mounting state of the first anti-rotation device 1 shown in Figure 1. According to the first anti-rotation device 1 described above, the extruded cement board 100 (building panel) can be attached to the mounting bracket bolt 102 after it has been attached to the base material 110, as follows. In this embodiment, the extruded cement board 100 is attached to the mounting bracket 101, which is a Z-clip, by the mounting bracket bolt 102 and a square nut 106 inserted into the hollow part. The mounting bracket bolt 102 has a spring washer 104 and a washer 105 inserted between it and the mounting bracket 101. The extruded cement board 100 with the mounting bracket 101 attached in this way is attached to the base material 110 by the mounting bracket 101.

[0032] When installing the first anti-rotation device 1, the mounting bolt 102 of the mounting bracket 101 that attaches the extruded cement board 100 to the base material 110 is slightly loosened. This creates space between the head 103 and the spring washer 104 of the mounting bracket bolt 102. Then, the first anti-rotation device 1 is pushed onto the head 103 of the mounting bracket bolt 102 so that the holding side 12 formed in the opening 11 is parallel to the two parallel sides of the head 103 of the mounting bracket bolt 102. At this time, the first holding part 23A and the second holding part 23B of the locking member 20 come into contact with the head 103, but since the locking member 20 is a thin material, it can be deformed and pushed in. As a result, the head 103 of the mounting bracket bolt 102 is inserted into the opening 11 and the first anti-rotation device 1 can be attached to the head 103 of the mounting bracket bolt 102. The first anti-rotation device 1 is attached to the head 103 of the mounting bracket bolt 102, with the head 103 positioned approximately in the center of the first anti-rotation device 1.

[0033] The first anti-rotation device 1 then inserts the end of the first holding portion 23A between the head 103 of the mounting bracket bolt 102 and the spring washer 104. After that, the mounting bracket bolt 102 is tightened to a predetermined set torque. In this embodiment, the mounting bracket bolt 102 is tightened until the rising portion 21 faces vertically. With this tightening state, the rising portion 21 faces vertically when the mounting bracket bolt 102 is tightened to approximately the predetermined set torque. In addition, the first anti-rotation device 1 is held by the head 103 of the mounting bracket bolt 102. When installing the anti-rotation device 1 after the construction of the extruded cement board 100, it is desirable to install it on the mounting bracket 101 one by one in sequence. This is because if the mounting bracket bolts 102 of the extruded cement board 100 are loosened at multiple locations at once, there is a risk of misalignment of the installed extruded cement board 100.

[0034] With the first anti-rotation device 1 installed in this manner, after attaching the extruded cement board 100 to the base material 110, it is possible to prevent the mounting bracket bolt 102 from rotating by attaching it to the head 103 of the mounting bracket bolt 102 as follows.

[0035] <Mounting structure for building panels> Figure 6 is a perspective view showing an example of a mounting structure 40 for building panels. Figure 6 is a perspective view of the mounting structure 40 as seen from inside an extruded cement board 100, which is a building panel. In this embodiment, two mounting brackets 101 are provided for one extruded cement board 100. Therefore, the two first anti-rotation devices 1 are attached to the heads 103 of the mounting bracket bolts 102 such that their respective raised portions 21 become parallel after being tightened to a predetermined set torque.

[0036] Thus, in the state after installation of the extruded cement board 100, it is desirable that the two parallel sides of the heads 103 of the multiple mounting bracket bolts 102 that are held by the first anti-rotation device 1 are parallel to the longitudinal direction of the extruded cement board 100. In this way, the first anti-rotation devices 1 at the positions of the multiple mounting brackets 101 can be connected as follows.

[0037] In other words, the two first anti-rotation devices 1 can be connected by inserting a connecting member 30 through the through holes 22 of the parallel rising portions 21, and the through holes 22 can be connected by the connecting member 30 that is locked into the through holes 22. In this embodiment, the connecting member 30 is made of metal wire, and the two through holes 22 are connected by inserting it into the through holes 22 and then folding and fixing it. The connecting member 30 may simply be attached to connect adjacent first anti-rotation devices 1, or tension may be applied to the connecting member 30. If the connecting member 30 is made of wire, the connecting member 30 can be doubled up and inserted into the through holes 22 of each first anti-rotation device 1 to connect them, and tension can be applied by twisting the doubled wire.

[0038] The connecting member 30 can be made of wire or other wire material, as well as a metal rod. If the connecting member 30 is made of wire material, it can be attached by passing the end through the through hole 22 of the rising portion 21 and tying it. If the connecting member 30 is made of metal rod, it may be attached by providing a hook at the end that hooks into the through hole 22 of the rising portion 21.

[0039] With this mounting structure 40, the two first anti-rotation devices 1 are integrated by the connecting member 30, and the rotation of each first anti-rotation device 1 is prevented by the other first anti-rotation device 1.

[0040] Furthermore, the first anti-rotation device 1 connected by the connecting member 30 may be an adjacent first anti-rotation device 1, or it may be a first anti-rotation device 1 on the same extruded cement board 100, or an adjacent first anti-rotation device 1 on the extruded cement board 100.

[0041] Furthermore, if the extruded cement board 100 is attached to the base material 110 with a single mounting bracket 101, one end of the connecting member 30 can be locked into the through hole 22 provided in the rising portion 21 of one first anti-rotation device 1, and the other end can be fixed to a fixing part such as the base material 110.

[0042] Thus, with the mounting structure 40 for the extruded cement board 100 using the first rotation prevention device 1, after the extruded cement board 100 is attached to the base material 110, it can be attached to the head 103 of the mounting bracket bolt 102 to prevent the mounting bracket bolt 102 from rotating.

[0043] Therefore, the mounting bracket bolts 102 can maintain a state of being tightened to a predetermined set torque. In other words, the mounting brackets 101 of the extruded cement board 100 (architectural panel) are tightened to a predetermined set torque depending on the place of use, and that set torque can be maintained. Moreover, the first anti-rotation device 1 prevents the mounting bracket bolts 102 from loosening or tightening even if displacement occurs in the extruded cement board 100 due to interlayer displacement caused by wind or other factors after construction. Thus, the first anti-rotation device 1 can maintain the mounting bracket bolts 102 at the set torque during construction.

[0044] <Other embodiments of the mounting structure> Figure 7 is a drawing showing another example of the connecting member 30 in the mounting structure 40 shown in Figure 6, where (A) is an exploded view showing a part of the connecting member 31, and (B) is a front view of the connected state of the connecting member 31 as seen from inside the building panel (extruded cement board 100). Figure 7 shows only a portion of the connecting member 31.

[0045] As shown in Figures 7(A) and (B), the connecting member 31 in this example uses a rod and comprises two locking rods 35 and a turnbuckle 37 that applies tension to these locking rods 35. The locking rods 35 have bent portions 36 at both ends of the metal rod. The turnbuckle 37 has hooks 38 at both ends that hook onto the bent portions 36 of the locking rods 35. In addition to metal rods, the locking rods 35 can also be wires with ring-shaped portions at their ends to which the hooks 38 can be hooked.

[0046] The connecting member 31 has a bent portion 36 at one end of the locking rod 35 that hooks into a through hole 22 in the rising portion 21 of the first anti-rotation device 1, and the other bent portion 36 that hooks into the hook 38 of the turnbuckle 37. Then, by rotating the central portion of the turnbuckle 37 in a predetermined direction, tension can be applied between the two first anti-rotation devices 1 to connect them. Thus, the connecting member 31 may be configured to have a turnbuckle 37 in the middle to apply tension.

[0047] Furthermore, the connecting member 31 may have female threads at both ends of the locking rod 35, and a nut may be screwed onto the female thread at the outer portion of the through hole 22 to hold it in place. In this case, tension may be applied by adjusting the amount the nuts at both ends are screwed in.

[0048] Furthermore, the tension applied to the connecting members 30 and 31 that connect the first anti-rotation devices 1 does not need to be strong; it is sufficient to apply just enough force to prevent slack in the connecting members 30 and 31. In this way, the rotation of each of the first anti-rotation devices 1 is suppressed, and the anti-rotation function is further improved.

[0049] <Other embodiments of anti-rotation devices> Figures 8(A) to 8(E) are front views showing other embodiments of the anti-rotation device. Note that the second anti-rotation device 2 to the sixth anti-rotation device 6 of the embodiments described below will be described using only front views. The second anti-rotation device 2 to the sixth anti-rotation device 6 will be described using the same reference numerals as the first anti-rotation device 1 described above for components identical to those of the first anti-rotation device 1.

[0050] Figure 8(A) is a front view showing the second anti-rotation device 2. The orientation of the opening 11 of the main body member 10 of the second anti-rotation device 2 is 90 degrees different from that of the first anti-rotation device 1. The longitudinal direction of the opening 11 of the second anti-rotation device 2 is horizontal. In addition, the first retaining part 23A of the second anti-rotation device 2 protrudes from the left towards the opening 11, and the second retaining part 23B protrudes from the right. Alternatively, the first retaining part 23A of the second anti-rotation device 2 may protrude from the right and the second retaining part 23B protrudes from the left. The dimensions of each part are the same as those of the first anti-rotation device 1 described above.

[0051] With this second anti-rotation device 2, the head 103 of the mounting bracket bolt 102 can be fixed at an angle 90 degrees different from that of the first anti-rotation device 1, with the rising portion 21 of the locking member 20 facing vertically. Therefore, the second anti-rotation device 2 can be used when, when the tightening torque of the mounting bracket bolt 102 is set to a predetermined torque value, it is preferable that the two parallel sides of the head 103 of the mounting bracket bolt 102 are perpendicular to the longitudinal direction of the extruded cement board 100.

[0052] In other words, while the tightening torque value of the mounting bracket bolt 102 for the extruded cement board 100 (architectural panel) is determined during normal construction, it is expected that the angle at which the head 103 stops will vary depending on the torque adjustment. In this case, depending on the angle at which the head 103 stops, one of two types of anti-rotation devices, the first anti-rotation device 1 and the second anti-rotation device 2, can be used, and the one that provides a value close to the predetermined tightening torque value when the rising portion 21 is parallel to the longitudinal direction of the extruded cement board 100 can be used. It is preferable that the appropriate tightening torque value for the mounting bracket bolt 102 is close to the predetermined torque value with an error of approximately 10% or less from the target torque value. Therefore, by selectively using the first anti-rotation device 1 and the second anti-rotation device 2, the rotation of the head 103 can be appropriately prevented at a value closer to the predetermined torque value.

[0053] Figure 8(B) is a front view showing the third anti-rotation device 3. The third anti-rotation device 3 has an opening 15 in the main body member 10 that extends to the outer circumference at a position different from that of the rising portion 21. In this example, the opening 15 is open downwards, opposite to the position where the first holding portion 23A is provided. With this third anti-rotation device 3, the third anti-rotation device 3 can be inserted into the head 103 of the mounting bracket bolt 102 from the open portion of the opening 15. Therefore, the work of attaching the third anti-rotation device 3 to the mounting bracket bolt 102 can be made easier, improving work efficiency.

[0054] Figure 8(C) is a front view showing the fourth anti-rotation device 4. The fourth anti-rotation device 4 is an example in which the upper part of the opening 16 of the anti-rotation device 1 conforms to the shape of the head 103 of the mounting bracket bolt 102. The upper part of the opening 16 of the fourth anti-rotation device 4 has an inclined edge 17 that conforms to the slope of the head 103 of the mounting bracket bolt 102. A first retaining part 23A is provided in the middle of the inclined edge 17. With this fourth anti-rotation device 4, when attached to the head 103 of the mounting bracket bolt 102, the retaining edge 12 of the opening 16 and the upper inclined edge 17 conform to the head 103, so that the fourth anti-rotation device 4 can be properly held in the fixed position of the mounting bracket bolt 102.

[0055] Figure 8(D) is a front view showing the fifth anti-rotation device 5. The fifth anti-rotation device 5 has an opening 18 that extends from the opening 16 of the fourth anti-rotation device 4 to the outer circumference at a position different from that of the rising portion 21. In this example, the opening 18 is open downwards, opposite to the position where the first holding portion 23A is provided. With this fifth anti-rotation device 5, the fifth anti-rotation device 5 can be inserted into the head 103 of the mounting bracket bolt 102 from the open portion of the opening 18. Therefore, the work of attaching the fifth anti-rotation device 5 to the mounting bracket bolt 102 can be made easier, improving work efficiency.

[0056] Figure 8(E) is a front view showing the sixth anti-rotation device 6. The sixth anti-rotation device 6 is an example in which the second retaining portion 23B of the first anti-rotation device 1 is replaced with the first retaining portion 23A. The sixth anti-rotation device 6 has first retaining portions 23A of the same length protruding toward the opening 11. With the sixth anti-rotation device 6, after being attached to the head 103 of the mounting bracket bolt 102, both first retaining portions 23A can be sandwiched between the head 103 of the mounting bracket bolt 102 and the spring washer 104. Therefore, the sixth anti-rotation device 6 can be more securely held by the mounting bracket bolt 102.

[0057] The first to sixth anti-rotation devices 1 to 6 described above are merely examples, and various modifications are possible as long as they do not impair the essence of this application. This application is not limited to the embodiments described above. Furthermore, it is possible to combine the configurations of the first to sixth anti-rotation devices 1 to 6 described above, and the configurations of each anti-rotation device 1 to 6 are not limited to the embodiments described above.

[0058] <Summary> As described above, the anti-rotation devices 1 to 6 can be attached to the head 103 of the mounting bracket bolt 102 without removing the mounting bracket 101, even after the extruded cement board 100 (building panel) has been attached to the base material 110, thereby preventing the mounting bracket bolt 102 from rotating. Therefore, the anti-rotation devices 1 to 6 can efficiently prevent the rotation of the mounting bracket bolt 102 even after the extruded cement board 100 (building panel) has been installed.

[0059] Furthermore, the anti-rotation devices 1 to 6 can prevent the mounting bracket bolt 102 from rotating even when it is tightened to a lower torque than the normal torque. Therefore, it is possible to properly maintain a lower torque than the normal torque for the mounting bracket bolt 102.

[0060] Furthermore, the anti-rotation devices 1 to 6 can prevent the mounting bracket bolts 102 from rotating even when they are tightened to the normal set torque. Therefore, even if displacement occurs in the extruded cement board 100 (building panel) due to inter-story displacement caused by typhoons or earthquakes, the anti-rotation devices 1 to 6 can properly maintain the set torque of the mounting bracket bolts 102, thereby further enhancing stability after installation. [Explanation of Symbols]

[0061] 1. First anti-rotation device 2. Second anti-rotation device 3. Third anti-rotation device 4. Fourth anti-rotation device 5. Fifth anti-rotation device 6. Anti-rotation device (6th) 10 Main body components 11. Opening (First anti-rotation device) 12 Holding edge 13 Plane part 15. Opening (Third rotation prevention device) 16. Opening (4th anti-rotation device) 17. Sloping edge 18. Opening (5th rotation prevention device) 20 Locking member 21. Upright section 22 Through hole 23 Holding part 23A 1st holding part 23B 2nd holding part 25 Locking groove 26 Excision 30 Connecting members (wires) 31 Connecting members (rods) 40 Mounting structure 100 Extruded cement board 101 Mounting bracket (Z clip) 102 Bolts for mounting brackets 103 Head 104 Spring Washer 105 Washer 106 square nuts 110 Underlayment B1 Width of two sides B2 dimensions B3 thickness W1, W2 dimensions P1, P2, P3 dimensions H1 Height

Claims

1. A rotation prevention device for preventing the rotation of a bolt for a mounting bracket used to fix a mounting bracket to a building panel, A main body having a predetermined thickness and an opening that engages with the head of the mounting bracket bolt, A rising portion that protrudes from the main body in the thickness direction of the main body, A locking portion provided on the aforementioned rising portion, A connecting member having a first end that is locked to the locking portion and a second end that is locked to another anti-rotation device or to a fixing portion of the base material to which the building panel is attached, A device that prevents rotation of bolts for building panel mounting brackets.

2. A rotation prevention device for preventing the rotation of a bolt for a mounting bracket that secures a mounting bracket to a building panel, A main body member having a predetermined thickness and an opening that engages with the head of the mounting bracket bolt, A locking member having a rising portion that protrudes from the main body member in the thickness direction of the main body member, and a locking portion provided on the rising portion, The device comprises a connecting member having a first end that is locked to the locking portion and a second end that is locked to another anti-rotation device or to a fixing portion of the base material to which the building panel is attached. A device to prevent rotation of bolts used in mounting brackets for building panels.

3. The opening edge of the opening is A pair of opposing retaining sides that engage with the two parallel sides of the head of the bolt for the mounting bracket, It has a retaining portion that protrudes from the side sandwiched between the pair of retaining sides toward the center of the opening and holds the head of the bolt for the mounting bracket, A device to prevent rotation of bolts for building panel mounting brackets according to claim 1 or 2.

4. The retaining portion is provided on each of the pair of opposing sides of the opening edge of the opening that are sandwiched between the pair of retaining sides, A device to prevent rotation of bolts for building panel mounting brackets as described in claim 3.

5. The retaining portion is provided on one side of the opening perpendicular to the pair of retaining sides, and the portion of the opening opposite to the side on which the retaining portion is provided in the direction of extension of the pair of retaining sides is open, the anti-rotation device for a bolt for a building panel mounting bracket according to claim 3.

6. A mounting structure for a building panel, comprising the anti-rotation device described in claim 1 or 2, and the other anti-rotation device or the base material.

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