JP7607332B2 - Supporting device - Google Patents

Description

The present invention relates to a support device that supports an object between a pair of hanging bolts that hang down into a ceiling space.

Ceiling-mounted air conditioners, various piping, and other ceiling-mounted items are supported in a suspended state in the ceiling space by hanging bolts that hang down from the floor slab of the upper floor. However, when attempting to install a new ceiling-mounted item when there are already many ceiling-mounted items installed in the ceiling space, the existing ceiling-mounted items get in the way, making it difficult to attach the new hanging bolts to the floor slab of the upper floor.

For this reason, methods have been proposed in the past to use existing suspension bolts to install a new ceiling installation (for example, Patent Documents 1, 2, 3, and 4). That is, the conventional methods adopt a structure in which an L-shaped angle bar is attached between a pair of existing suspension bolts, and a new ceiling installation (support object) is attached to the angle bar. In this structure, if the fixing strength of the angle bar to the suspension bolts is insufficient, it may become loose during an earthquake, for example, and the angle bar may come off the suspension bolt, causing the ceiling installation object to fall from the ceiling space. To prevent this, when attaching the angle bar between a pair of suspension bolts, it is necessary to firmly and reliably fix the angle bar to each of the pair of suspension bolts.

For example, the conventional technologies of Patent Documents 1, 2, and 3 employ a structure in which a metal fitting that holds a single hanging bolt in a clamped state is fixed to an angle bar with two bolts. However, with this conventional technology, two bolts must be tightened when fixing the angle bar to a single hanging bolt, which poses a problem of poor work efficiency. This type of installation work requires high-altitude work in the ceiling space, and it is difficult to secure sufficient work space, so from the perspective of improving work efficiency, it is desirable to reduce the number of places where the bolts are tightened.

In addition, the conventional technology of Patent Document 4 adopts a structure in which an axial member with male threads on both ends is inserted into each of two clamping members that clamp the hanging bolt, and nuts are attached to both ends of the axial member and tightened to fix the angle bar to the hanging bolt. However, in this conventional technology, there is a possibility that the axial member may rotate when tightening the nut. If the axial member rotates, the nut cannot be tightened with sufficient strength, and the angle bar cannot be firmly and securely fixed to the hanging bolt. In order to prevent the axial member from rotating, when tightening the nut attached to one end of the axial member with a power tool, it is necessary to hold down the nut attached to the other end of the axial member with a wrench, etc., which is a cumbersome task and a factor that reduces work efficiency. In particular, various components and devices are suspended in the ceiling space, and it is sometimes difficult to secure sufficient work space, and there are also cases in which it is difficult to hold down the nut attached to the other end of the axial member with a wrench, etc.

Utility Model Registration No. 3152477 Utility Model Registration No. 3151654 JP 2016-125523 A JP 2020-94678 A

The present invention was made to solve the above problems and to solve the problems of the conventional technology described above, and aims to provide a support device that reduces the number of bolt tightening points to improve work efficiency and allows for strong and reliable fixation to the hanging bolts.

In order to achieve the above-mentioned object, firstly , the present invention provides a support device comprising: a support member that crosses between a pair of hanging bolts and is arranged in a state where it is joined to each of the pair of hanging bolts; a clamping member that clamps the hanging bolt between the support member and the clamping member; a fastening bolt having a bolt head and a male screw portion, the male screw portion being inserted into a bolt insertion hole formed in each of the support member and the clamping member; and a tightening nut that is attached to the tip of the male screw portion of the fastening bolt, wherein the fastening bolt has the bolt head arranged on a surface of the support member opposite to a surface to which the hanging bolt is joined, and the tightening nut is attached to the tip of the male screw portion protruding from the clamping member, and is characterized in that the fastening bolt has a co-rotation prevention means that engages the bolt head with the support member and prevents the male screw portion from co-rotating with the tightening nut when the tightening nut is tightened.

Secondly , the present invention provides a support device having the above-mentioned first configuration, wherein the support member has a vertical plate portion arranged in a state where it is joined to each of the pair of hanging bolts, and a horizontal plate portion protruding from the widthwise end portion of the vertical plate portion toward the opposite side to the surface to which the hanging bolts are joined, and the rotation prevention means prevents rotation by engaging with the horizontal plate portion.

Thirdly , the present invention is a support device having either the first or second configuration, characterized in that the bolt head is a rod-shaped head that forms an approximately right angle with the male thread portion.

Fourthly , the present invention is a support device having the above-mentioned third configuration, characterized in that the support member has a long hole formed on the surface to which the hanging bolt is joined, through which the rod-shaped head can be inserted.

Fifthly , the present invention provides a support device having any one of the first to fourth configurations, characterized in that the clamping nut is a locking nut.

According to the present invention, it is possible to reduce the number of fastening points when fixing the support member to the hanging bolt, thereby improving work efficiency. In addition, since the co-rotation prevention means restricts the co-rotation of the fastening bolt, it is possible to firmly and reliably fix the support device to the hanging bolt.

FIG. 13 is a conceptual diagram showing an example of installation of a support device. FIG. 2 is an enlarged perspective view of a support device. 5A and 5B are diagrams illustrating an example of a configuration of a fixing member. 11A and 11B are diagrams illustrating an example of how a fixing member is assembled to a support member. FIG. 4 is a diagram showing the sizes of a bolt head of a fastening bolt and a support member. 13A and 13B are diagrams illustrating a co-rotation prevention function provided by a co-rotation prevention means. 11A to 11C are diagrams showing a procedure for fixing the hanging bolt to the support member. 1 is a perspective view of the vertical plate portion as viewed from the rear side. 13 is a diagram showing an example in which an angle bar without a long hole is used as a support member. FIG. 13A and 13B are diagrams showing modified examples of the fastening bolt. 13A and 13B are diagrams showing another modified example of the fastening bolt. 13 is a diagram showing an example in which a support device places a supported object on an upper surface of a support member below a structural beam. FIG.

Below, preferred embodiments of the present invention will be described in detail with reference to the drawings. Note that in the drawings referred to below, the same reference numerals are used to designate common members, and redundant descriptions of those members will be omitted.

Figure 1 is a conceptual diagram showing an example of the installation of the support device 1 in one embodiment of the present invention. This support device 1 is a device that supports a support object 220 in the space below the upper floor slab 100, i.e., the ceiling space of the lower floor. More specifically, the support device 1 is arranged to cross between a pair of adjacent suspension bolts 110, 110 in a state in which a ceiling installation object 120 has already been installed in the ceiling space by each of the multiple suspension bolts 110 hanging down from the upper floor slab 100, and supports a new support object 220 between the pair of suspension bolts 110, 110. In other words, the support device 1 is a device that can install a new support object 220 in the ceiling space using the existing suspension bolts 110, 110 without driving new post-installation anchors or the like into the upper floor slab 100. The ceiling installation objects 120, 120 supported by the existing suspension bolts 110, 110 are ceiling-mounted air conditioners, various piping, cable racks, etc.

As shown in FIG. 1, the support device 1 includes a support member 2 that is disposed across a pair of hanging bolts 110, 110 and is attached to each of the pair of hanging bolts 110, 110, and fixing members 3, 3 that fix each of the pair of hanging bolts 110, 110 to the support member 2. For example, the fixing members 3, 3 are attached to positions near both ends of the support member 2 and fix the hanging bolts 110, 110 to the support member 2. In the example shown in FIG. 1, a fixing member 3 similar to the fixing member 3 that fixes the hanging bolts 110, 110 is also attached to the center of the support member 2. The fixing member 3 attached to the center of the support member 2 is for fixing the bolt member 210 that supports the supported object 220 in a suspended state to the support member 2. This bolt member 210 supports the supported object 220 at its lower end. In addition, in FIG. 1, a cylindrical pipe is illustrated as an example of the supported object 220.

2 is an enlarged perspective view of the support device 1. The support member 2 is a long metal member arranged to cross between a pair of hanging bolts 110, 110. The support member 2 is, for example, made of an angle material with an L-shaped cross section, and has a vertical plate portion 21 and a horizontal plate portion 22. The vertical plate portion 21 is arranged in a vertical direction parallel to the hanging bolts 110, 110, and the hanging bolts 110, 110 are joined to its surface. The horizontal plate portion 22 is formed to protrude from the width direction end of the vertical plate portion 21 toward the opposite side (back side) from the surface (front side) to which the hanging bolts 110, 110 are joined. The vertical plate portion 21 and the horizontal plate portion 22 are connected to each other so as to form an approximately right angle. Such a support member 2 is arranged to cross, for example, between a pair of hanging bolts 110, 110 in the horizontal direction. However, the arrangement direction of the support member 2 is not necessarily limited to the horizontal direction, and it is also possible to arrange it in a manner in which it is inclined in an oblique direction.

For example, the support member 2 in this embodiment is a perforated angle material in which long holes 23, 24 having a predetermined length in the longitudinal direction of the support member 2 are formed at a predetermined interval in each of the vertical plate portion 21 and the horizontal plate portion 22. For example, the vertical plate portion 21 has a long hole 23, and the horizontal plate portion 22 has a long hole 24. Such perforated angle materials are available in large quantities, which has the advantage that the support member 2 can be obtained inexpensively. The support member 2 utilizes the long holes 23 formed in the vertical plate portion 21 as bolt insertion holes.

The fixing member 3 includes a clamping member 4 that clamps and holds the hanging bolt 110, a fastening bolt 5 that attaches the clamping member 4 to the support member 2, and a tightening nut 6 that is attached to the fastening bolt 5. The clamping member 4 is a member that clamps the hanging bolt 110 between the vertical plate portion 21 of the support member 2. The fastening bolt 5 has a bolt head 5a and a male screw portion 5b. The bolt head 5a is disposed on the surface of the vertical plate portion 21 opposite to the surface to which the hanging bolt 110 is joined, and the male screw portion 5b is inserted through the vertical plate portion 21 of the support member 2 and the clamping member 4. The tightening nut 6 is attached to the tip of the male screw portion 5b that protrudes from the clamping member 4.

Figure 3 is a diagram showing an example of the configuration of the fixing member 3. Note that Figures 3(a) and (b) show the fixing member 3 as viewed from different directions.

The clamping member 4 is a member formed by bending a metal member of a predetermined shape, and has a flat plate portion 41 and clamping portions 42, 42 that are parallel to each other and are formed by bending both ends of the flat plate portion 41 at approximately right angles. The flat plate portion 41 is formed with a bolt insertion hole 44 through which the male screw portion 5b of the fastening bolt 5 can be inserted. The clamping portions 42, 42 are formed with engagement portions 43, 43 that engage with the outer circumferential surface of the hanging bolt 110. The engagement portions 43, 43 are formed, for example, as a form in which the clamping portions 42, 42 are notched in a U-shape. The hanging bolt 110 is arranged to engage with the two engagement portions 43, 43 provided on the clamping member 4. The bolt insertion hole 44 is formed at a position that is avoided to the side from the line connecting the two engagement portions 43, 43 so as not to interfere with the hanging bolt 110 that is arranged to cross the two engagement portions 43, 43.

The fastening bolt 5 is a bolt having an overall T-shape, as shown in, for example, Figures 3(a) and (b). That is, the bolt head 5a of the fastening bolt 5 is formed as a rod-shaped head arranged to form a substantially right angle with the male screw portion 5b, and the male screw portion 5b is connected to the center of the rod-shaped head. This fastening bolt 5 is arranged in the direction in which the pair of clamping portions 42, 42 of the clamping member 4 extend, and is arranged in the clamping member 4 by inserting the male screw portion 5b into the bolt insertion hole 44 from that direction. Then, a tightening nut 6 is attached to the tip of the male screw portion 5b that protrudes from the bolt insertion hole 44 to the opposite side of the clamping member 4.

The tightening nut 6 is a locking nut that includes a hexagonal nut body 61 and an anti-loosening mechanism 62 provided on one end surface of the nut body 61. The anti-loosening mechanism 62 includes friction pieces 63, 63 that are arranged to protrude inward from the screw hole of the nut body 61. For example, the friction pieces 63, 63 are formed by protruding two parts of a ring-shaped metal member inward. The ring-shaped metal member is arranged on the end surface of the nut body 61 and is assembled to the nut body 61 by a crimping portion 64 provided on the end surface of the nut body 61. When the male screw portion 5b of the fastening bolt 5 is inserted into the screw hole of the nut body 61, the tightening nut 6 engages with the male screw portion 5b to generate a prevailing torque, preventing the male screw portion 5b and the tightening nut 6 from freely rotating. As a result, the tightening nut 6 exerts an anti-loosening function. However, if the clamping nut 6 is tightly tightened using a power tool or the like, the clamping nut 6 can be threaded further into the male thread portion 5b.

Figure 4 is a diagram illustrating an example of how the fixing member 3 is assembled to the support member 2. As shown in Figure 4 (a), the fixing member 3 to which the clamping member 4, the fastening bolt 5, and the fastening nut 6 are assembled is attached to the vertical plate portion 21 of the support member 2. Here, the bolt head 5a of the fastening bolt 5 is formed so that its length L2 is smaller than the length L1 of the long hole 23 formed in the vertical plate portion 21. In addition, the width W2 of the bolt head 5a is approximately the same as the diameter of the male thread portion 5b, and is formed so as to be smaller than the width W1 of the long hole 23 formed in the vertical plate portion 21. In other words, the size of the bolt head 5a is formed smaller than the size of the long hole 23. As a result, even if the clamping member 4, the fastening bolt 5, and the fastening nut 6 are pre-assembled, the bolt head 5a can be inserted into the long hole 23 of the vertical plate portion 21, as shown by the arrow F1 in Figure 4 (a). As a result, as shown in FIG. 4(b), the fixing member 3 can be arranged with the bolt head 5a on the back side of the vertical plate portion 21, and the clamping member 4 and the tightening nut 6 on the front side of the vertical plate portion 21.

Figure 5 is a diagram showing the size of the bolt head 5a of the fastening bolt 5 and the support member 2. As shown in Figure 5 (a), the bolt head 5a of the fastening bolt 5 has a length L3 from the end of the rod-shaped head to the furthest position of the part where the male screw portion 5b is connected. On the other hand, the support member 2 has a length H1 from the upper edge of the long hole 23 formed in the vertical plate portion 21 to the horizontal plate portion 22. Here, the relationship between L3 and H1 is L3 ≧ H1. In this way, by making the length L3 of the bolt head 5a equal to or greater than the length H1 from the upper edge of the long hole 23 to the horizontal plate portion 22, the fastening bolt 5 has a co-rotation prevention means 7 that prevents the male screw portion 5b from co-rotating when the tightening nut 6 is tightened. In other words, the fastening bolt 5 makes the bolt head 5a function as the co-rotation prevention means 7.

Figure 6 is a diagram showing the co-rotation prevention function of the co-rotation prevention means 7. Figure 6 shows the state of the vertical plate portion 21 of the support member 2 as viewed from the back side where the bolt head 5a is arranged. As described above, the tightening nut 6 is configured as a locking nut and has friction pieces 63, 63 that engage with the male screw portion 5b. When the friction pieces 63, 63 are engaged with the male screw portion 5b, a certain friction force is generated between the male screw portion 5b and the tightening nut 6 when the tightening nut 6 is tightened, so that the male screw portion 5b rotates together with the tightening nut 6 as the tightening nut 6 rotates. When the male screw portion 5b rotates together with the tightening nut 6, the bolt head 5a also rotates. Then, as shown in Figure 6, when the end of the bolt head 5a comes into contact with and engages with the horizontal plate portion 22 of the support member 2, the rotation of the bolt head 5a is restricted. In other words, the co-rotation prevention means 7 prevents the bolt head 5a and the male screw portion 5b from co-rotating. Then, when a rotational force that exceeds the frictional force between the tightening nut 6 and the male screw portion 5b acts on the tightening nut 6, the rotation of the male screw portion 5b is restricted, and the tightening nut 6 can be tightened against the male screw portion 5b.

7 is a diagram showing the procedure for fixing the hanging bolt 110 to the support member 2. First, as shown in FIG. 7(a), the worker places the hanging bolt 110 between the vertical plate portion 21 of the support member 2 and the engagement portion 43 of the clamping member 4. At this time, if the tightening nut 6 is provided at the tip of the male screw portion 5b, the gap between the clamping member 4 and the vertical plate portion 21 can be widened, and the hanging bolt 110 can be easily inserted inside the engagement portion 43. After that, the worker tightens the tightening nut 6 using a power tool or the like to fix the hanging bolt 110 to the support member 2 as shown in FIG. 7(b). When this tightening operation is performed, the friction pieces 63, 63 of the tightening nut 6 engage with the male screw portion 5b, and when the frictional force between the tightening nut 6 and the male screw portion 5b increases, the male screw portion 5b rotates together with the tightening nut 6. As a result, the bolt head 5a also rotates together with the tightening nut 6, and the end of the bolt head 5a, which is provided as the co-rotation prevention means 7, comes into contact with the horizontal plate portion 22. FIG. 8 is a perspective view seen from the back side of the vertical plate portion 21, showing the state in which the end of the bolt head 5a comes into contact with the horizontal plate portion 22. As shown in FIG. 8, when the end of the bolt head 5a comes into contact with the horizontal plate portion 22 and the co-rotation prevention function of the co-rotation prevention means 7 is effectively activated, the co-rotation of the male screw portion 5b is restricted. Therefore, from this point on, the tightening nut 6 can be smoothly tightened against the male screw portion 5b. As a result, the hanging bolt 110 is fixed between the clamping member 4 and the vertical plate portion 21.

In this way, in the support device 1 of this embodiment, it is sufficient to tighten one tightening nut 6 to fix one hanging bolt 110 to the support member 2. Therefore, when installing the support device 1 with appropriate strength between a pair of hanging bolts 110, 110 as shown in FIG. 1, it is sufficient to tighten two tightening nuts 6. Therefore, there is an advantage that the work efficiency can be improved when the work of attaching the support device 1 to a pair of hanging bolts 110 is performed as a high-altitude work. In addition, since the number of tightening nuts 6 to be tightened is small, it is also possible to reduce the possibility of dropping the nuts during high-altitude work, and there is also the advantage that the work can be carried out safely.

In addition, in the support device 1 of this embodiment, the clamping member 4, fastening bolt 5, and fastening nut 6 are preassembled, and the fixing member 3 can be attached to the support member 2 by inserting the bolt head 5a into the long hole 23 of the support member 2. Therefore, there is no need to assemble the clamping member 4, fastening bolt 5, and fastening nut 6 separately for work at height, which also provides excellent work efficiency. In addition, because the clamping member 4, fastening bolt 5, and fastening nut 6 can be preassembled, there is also the advantage that the fastening bolt 5 and fastening nut 6 will not fall during work at height, allowing work to be carried out safely.

In addition, the support device 1 of this embodiment is arranged so that a pair of hanging bolts 110, 110 are joined to the surface of the vertical plate portion 21 of the support member 2, so that the fixing member 3 can be inserted into the long hole 23 from the surface side of the vertical plate portion 21, and the tightening nut 6 can also be tightened from the surface side of the vertical plate portion 21. In other words, the support device 1 of this embodiment makes it possible to access the installation surface including the pair of hanging bolts 110, 110 from only one direction and to proceed with work at heights efficiently.

In addition, in the case of the present embodiment where the clamping member 4 clamps the outer peripheral surface of the hanging bolt 110 and fixes the hanging bolt 110 to the support member 2, if the fastening state between the fastening bolt 5 and the fastening nut 6 loosens, there is a problem that the support member 2 falls from the hanging bolt 110. In order to prevent this, when the support device 1 is fixed to the hanging bolt 110 by fastening the fastening nut 6, it is necessary to fix the fastening bolt 5 and the fastening nut 6 securely with sufficient strength. As described above, in the support device 1 of this embodiment, the fastening bolt 5 is provided with a co-rotation prevention means 7. This co-rotation prevention means 7 prevents the male screw portion 5b from co-rotating when the fastening nut 6 attached to the male screw portion 5b is tightened. Therefore, the fastening nut 6 can be tightened securely with sufficient strength to the male screw portion 5b, and it is possible to prevent insufficient tightening strength in advance.

In particular, by providing the fastening bolt 5 with the co-rotation prevention means 7, there is no need to hold down the bolt head 5a of the fastening bolt 5 with a wrench or the like when tightening the clamping nut 6, which has the advantage that work can be done easily and efficiently even when it is difficult to secure sufficient working space.

Furthermore, the support device 1 of this embodiment uses a locking nut as the tightening nut 6 attached to the male screw portion 5b of the tightening bolt 5. Therefore, the tightening nut 6, which is tightened to the male screw portion 5b with sufficient strength, will not loosen after the tightening operation is performed. For example, even if vibration is transmitted to the hanging bolt 110 or the support member 2, the tightening state between the fastening bolt 5 and the tightening nut 6 will not loosen. In particular, if the ceiling installation object 120 supported by the hanging bolts 110, 110 is an air conditioner, the hanging bolts 110, 110 will vibrate continuously due to the operation of the air conditioner. Although the vibration in this case is weaker than the vibration during an earthquake, the hanging bolt 110 will vibrate continuously for a long period of time. Since the tightening nut 6 uses a locking nut, even if the hanging bolt 110 vibrates continuously for a long period of time, the tightening state will never loosen and sufficient tightening strength can be maintained.

When the support device 1 is installed between the pair of hanging bolts 110, 110 as described above, the supported object 220 is then attached to the support device 1. For example, as shown in FIG. 1, when the bolt member 210 is attached to the support device 1 and the bolt member 210 supports the supported object 220 in a suspended state, the fixing member 3 is attached to the support member 2 by the same procedure as described above, and the bolt member 210 is fixed in a clamped state between the clamping member 4 of the fixing member 3 and the vertical plate portion 21 of the support member 2. As a result, the bolt member 210 is installed in a state of hanging from the support member 2 between the pair of hanging bolts 110, 110, and the effort of newly installing anchors or the like in the upper floor floor slab 100 can be saved. In addition, since the fixing member 3 is used to fix the bolt member 210 to the support member 2, the bolt member 210 can be reliably fixed to the support member 2 with sufficient strength.

Although a preferred embodiment of the present invention has been described above, the present invention is not limited to the embodiment described above. In other words, the present invention includes various modifications of the embodiment described above.

For example, in the above embodiment, a case was illustrated in which a perforated angle bar was used as the support member 2, with long holes 23, 24 having a predetermined length in the longitudinal direction of the support member 2 formed at a predetermined interval in each of the vertical plate portion 21 and the horizontal plate portion 22. However, the support device 1 is not necessarily limited to using a perforated angle bar as the support member 2.

9 is a diagram showing an example of using an angle bar in which the long holes 23, 24 are not formed as the support member 2. As shown in FIG. 9(a), the support member 2 has a vertical plate portion 21 and a horizontal plate portion 22. The long holes 23, 24 described above are not formed in this support member 2. Therefore, the vertical plate portion 21 has a bolt insertion hole 29 at a position corresponding to the mounting position of the hanging bolt 110 and the bolt member 210. The bolt insertion hole 29 may be drilled and formed in the vertical plate portion 21 at the construction site using, for example, an electric drill, or may be drilled and formed in advance at the factory before transporting from the factory to the construction site. The bolt insertion hole 29 drilled and formed using an electric drill, etc., is a circular hole as shown in FIG. 9(a), unlike the long hole 23 described above. In this case, when attaching the fixing member 3 to the support member 2, the clamping member 4, the fastening bolt 5, and the tightening nut 6 cannot be assembled in advance as described above. Therefore, as shown in FIG. 9(a), with the clamping member 4, the fastening bolt 5, and the fastening nut 6 separated, the male thread portion 5b of the fastening bolt 5 is inserted into the bolt insertion hole 29 from the back side of the vertical plate portion 21, and the clamping member 4 and the fastening nut 6 are attached to the male thread portion 5b protruding from the front side of the vertical plate portion 21. This allows the fixing member 3 to be attached to the support member 2, as shown in FIG. 9(b).

In addition, in the above embodiment, the fastening bolt 5 is a bolt having an overall T-shape. However, the fastening bolt 5 is not limited to a T-shape.

Figure 10 shows a modified example of the fastening bolt 5. As shown in Figure 10, the fastening bolt 5 may be L-shaped. In this case, the bolt head 5a of the fastening bolt 5 is formed as a rod-shaped head arranged to form a substantially right angle with the male screw portion 5b, and the male screw portion 5b is connected to the end of the rod-shaped head. In this case, the length of the bolt head 5a can be set to be equal to or greater than the length H1 from the upper edge of the long hole 23 formed in the vertical plate portion 21 to the horizontal plate portion 22, as described above, to form the co-rotation prevention means 7.

11 is a diagram showing yet another modified example of the fastening bolt 5. For example, as shown in FIG. 11(a), the fastening bolt 5 may be a general hexagonal bolt head 51 to which a co-rotation prevention member 52 is attached. For example, the co-rotation prevention member 52 has a flat plate portion 53 and a pair of wall portions 54, 54 formed by bending both ends of the flat plate portion 53. The pair of walls 54, 54 can accommodate the head 51 of the hexagonal bolt inside, and the inner surfaces of the walls 54, 54 can be engaged with the side surfaces of the head 51. The flat plate portion 53 also has a U-shaped notch 55 formed at the end in the longitudinal direction, and the male screw portion 5b of the hexagonal bolt can be accommodated in the notch 55. As shown in FIG. 11(b), the co-rotation prevention member 52 forms the fastening bolt 5 by inserting the male screw portion 5b of the hexagonal bolt into the notch 55. That is, the fastening bolt 5 has a co-rotation prevention means 7 formed by the co-rotation prevention member 52. In this way, the fastening bolt 5 may be constructed by attaching the co-rotation prevention member 52 to a general hexagonal bolt. In this case, the fastening bolt 5 can be realized using a general hexagonal bolt, which has the advantage of keeping component costs low.

In the above embodiment, the support device 1 is installed below the upper floor floor slab 100. However, the above-mentioned support device 1 is not limited to being installed below the upper floor floor slab 100, and can also be appropriately installed below a structural beam, for example. Since a structural beam is a structure that supports a building, it is not possible to install a hanging bolt by driving a post-installed anchor or the like. Therefore, when installing a supported object 220 below a structural beam, the above-mentioned support device 1 can be suitably used.

The support device 1 in the above embodiment is exemplified as a configuration in which the bolt member 210 is attached to the support member 2, and the bolt member 210 supports the supported object 220 in a suspended state. However, the support device 1 is not limited to supporting the supported object 220 in a suspended state. For example, the support device 1 may support the supported object 220 in a state in which it is placed on the support member 2.

12 is a diagram showing an example in which the support device 1 places the support object 220 on the upper surface of the support member 2 below the structural beam 101. As shown in FIG. 12, when the support object 220 is placed at a position below the structural beam 101, a pair of hanging bolts 110, 110 are installed on both sides of the structural beam 101. The support device 1 is installed at a position below the structural beam 101 by being arranged so as to cross the pair of hanging bolts 110, 110 installed on both sides of the structural beam 101. In addition, when the support device 1 shown in FIG. 12 is arranged in a state in which the vertical plate portion 21 of the support member 2 is joined to the pair of hanging bolts 110, 110, the horizontal plate portion 22 is arranged to be located at the upper end of the vertical plate portion 21. A fixing band 230 is attached to the long hole 24 provided in the horizontal plate portion 22, and the support object 220 is fixed in a state in which it is placed on the horizontal plate portion 22. In this way, the support device 1 can support the supported object 220 not only in a state where it is suspended from the support member 2, but also in a state where it is placed on the support member 2. When installing the supported object 220 below the structural beam 101 in this way, by using the support device 1 described above, it is no longer necessary to install the hanging bolts 110 on the structural beam 101, so it is possible to properly install the supported object 220 without reducing the strength of the structural beam 101.

In the above embodiment, an example was given of an angle iron (angle steel) with an L-shaped cross section being used as the support member 2. However, the support member 2 is not limited to an angle iron with an L-shaped cross section. For example, the support member 2 may be a lip channel steel or a light channel steel.

In the above embodiment, the co-rotation prevention means 7 engages with the horizontal plate portion 22 located on the back side of the vertical plate portion 21 to prevent the fastening bolt 5 from rotating. However, the co-rotation prevention means 7 is not necessarily limited to engaging with the horizontal plate portion 22. For example, a structure that prevents the fastening bolt 5 from rotating may be provided by providing an engagement portion that protrudes from the back side of the vertical plate portion 21 and engaging the co-rotation prevention means 7 with the engagement portion.

In the above embodiment, a locking nut is used as the tightening nut 6, and when the friction pieces 63, 63 are engaged with the male screw portion 5b, the male screw portion 5b rotates together with the tightening nut 6 as the tightening nut 6 rotates. However, the co-rotation phenomenon of the male screw portion 5b does not occur only when the tightening nut 6 is a locking nut. For example, even if the tightening nut 6 is a normal hexagonal nut, if the friction force between the tightening nut 6 and the male screw portion 5b exceeds a certain value, the male screw portion 5b may rotate together with the tightening nut 6 even if the tightening nut 6 is not sufficiently tightened. Therefore, the above-mentioned co-rotation prevention means 7 does not function only when the tightening nut 6 is a locking nut, but also functions sufficiently when the tightening nut 6 is a normal hexagonal nut.

Furthermore, in the above embodiment, an example was described in which the hanging bolt 110 is fixed to the support member 2 by clamping the hanging bolt 110 between the clamping member 4 and the vertical plate portion 21. However, the clamping member 4 may be composed of two members, a first clamping member and a second clamping member, and the hanging bolt 110 may be clamped between the first clamping member and the second clamping member. The fastening bolt 5 is arranged such that the tip of the male thread portion 5b is inserted into the bolt insertion hole of the support member 2, and then the tip is further inserted into each of the first clamping member and the second clamping member, and the tightening nut 6 is attached to the tip. It is clear that even with such a structure, the action and effect described in the above embodiment can be achieved.

1...support device, 2...support member, 3...fixing member, 4...clamping member, 5...fastening bolt, 6...tightening nut (anti-loosening nut), 7...co-rotation prevention means, 21...vertical plate portion, 22...horizontal plate portion, 23...long hole (bolt insertion hole), 110...suspension bolt.

Claims (5)

A support member that crosses between the pair of suspension bolts and is arranged in a state where it is joined to each of the pair of suspension bolts;
a clamping member that clamps the hanging bolt between the clamping member and the support member;
a fastening bolt having a bolt head and a male screw portion, the male screw portion being inserted into a bolt insertion hole formed in each of the support member and the clamping member;
A clamping nut attached to the tip of the male thread portion of the fastening bolt;
Equipped with
A support device characterized in that the fastening bolt has a bolt head positioned on the surface of the support member opposite to the surface to which the hanging bolt is joined, the fastening nut is attached to the tip of the male threaded portion protruding from the clamping member, and has a co-rotation prevention means that engages the bolt head with the support member and prevents the male threaded portion from co-rotating with the fastening nut when the fastening nut is tightened. The support member has a vertical plate portion disposed in a state where it is joined to each of the pair of hanging bolts, and a horizontal plate portion formed to protrude from a width direction end portion of the vertical plate portion toward an opposite side to a surface to which the hanging bolts are joined,
2. The supporting device according to claim 1 , wherein the co-rotation prevention means prevents co-rotation by engaging with the horizontal plate portion. 3. The support device according to claim 1 , wherein the bolt head is a rod-shaped head that forms a substantially right angle with the male screw portion. 4. The support device according to claim 3 , wherein the support member has a surface to which the hanging bolt is joined, the surface being formed with an elongated hole through which the rod-shaped head portion can be inserted. 5. The support device according to claim 1, wherein the fastening nut is a locking nut.

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