Supported devices

Abstract

To provide a support device which improves work efficiency by decreasing bolt-fastening points, and can be rigidly and surely fixed to suspension bolts.SOLUTION: A support member 1 which traverses between a pair of suspension bolts 110 and 110, is attached to the pair of suspension bolts 110 and 110, and supports a support object between the pair of suspension bolts 110 and 110 comprises; a support member 2 attached to the pair of the suspension bolts 110 and 110; and fixing members 3 for fixing the pair of suspension bolts 110 and 110 to the support member 2 respectively. The fixing member 3 has a grip member 4 for gripping and holding the suspension bolt 110, a fastening bolt 5 for attaching the grip member 4 to the support member 2, and a fastening nut 6 attached to the fastening bolt 5. The fastening bolt 5 has co-rotation prevention means 7 for preventing co-rotation with the fastening nut 6 when the fastening work of the fastening nut 6 is performed.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a support device that supports an object to be supported between a pair of suspension bolts hanging down into a ceiling space. [Background technology]

[0002] 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, it is difficult to attach a new hanging bolt to the floor slab of the upper floor because the existing ceiling-mounted items get in the way.

[0003] For this reason, a method of installing a new ceiling-mounted object using an existing suspension bolt has been proposed (for example, Patent Documents 1, 2, 3, and 4). That is, the conventional method adopts a structure in which an L-shaped angle bar is attached between a pair of existing suspension bolts, and a new ceiling-mounted object (supported object) is attached to the angle bar. In this structure, if the fixing strength of the angle bar to the suspension bolt is not sufficient, for example, during an earthquake, the angle bar may loosen and come off the suspension bolt, causing the ceiling-mounted object to fall from the ceiling space. In order 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.

[0004] For example, the conventional techniques of Patent Documents 1, 2, and 3 employ a structure in which a metal fitting that holds one hanging bolt in a clamped state is fixed to an angle bar with two bolts. However, this conventional technique requires the tightening of two bolts when fixing the angle bar to one hanging bolt, which causes 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 bolt tightening points.

[0005] In addition, the conventional technology of Patent Document 4 adopts a structure in which an axial member having male threads formed at 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 the nut is tightened. 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, 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. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Utility Model Registration No. 3152477 [Patent Document 2] Utility Model Registration No. 3151654 [Patent Document 3] JP 2016-125523 A [Patent Document 4] JP 2020-94678 A Summary of the Invention [Problem to be solved by the invention]

[0007] Therefore, the present invention has been made to solve the above-mentioned problems and to solve the above-mentioned problems of the conventional art, and its object is to provide a support device that improves work efficiency by reducing the number of points where bolts are tightened, and can be firmly and reliably fixed to the hanging bolts. [Means for solving the problem]

[0010] In order to achieve the above objectives, No. 1 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 the surface of the support member opposite to the 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 has a co-rotation prevention means that engages the bolt head with the support member when the tightening nut is tightened, and prevents the male screw portion from co-rotating with the tightening nut.

[0011] No. 2 In particular, the present invention relates to the above-mentioned 1 In a support device having the above configuration, the support member has a vertical plate portion that is arranged in a state where it is joined to each of the pair of hanging bolts, and a horizontal plate portion that protrudes from a widthwise end 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.

[0012] No. 3 In particular, the present invention relates to the above-mentioned 1 or No. 2 In the support device having any one of the configurations above, the bolt head is a rod-shaped head that forms a substantially right angle with the male screw portion.

[0013] No. 4 In particular, the present invention relates to the above-mentioned 3In the support device having the above configuration, the support member is characterized in that a long hole through which the rod-shaped head portion can be inserted is formed on the surface to which the hanging bolt is joined.

[0014] No. 5 The present invention relates to the above first to third aspects. 4 In the support device having any one of the above configurations, the clamping nut is a locking nut. Effect of the Invention

[0015] 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. [Brief description of the drawings]

[0016] [Figure 1] FIG. 13 is a conceptual diagram showing an example of installation of a support device. [Diagram 2] FIG. 2 is an enlarged perspective view of a support device. [Diagram 3] 5A and 5B are diagrams illustrating an example of a configuration of a fixing member. [Figure 4] 11A and 11B are diagrams illustrating an example of how a fixing member is assembled to a support member. [Diagram 5] FIG. 4 is a diagram showing the sizes of a bolt head of a fastening bolt and a support member. [Figure 6] 13A and 13B are diagrams illustrating a co-rotation prevention function provided by a co-rotation prevention means. [Figure 7] 11A to 11C are diagrams showing a procedure for fixing the hanging bolt to the support member. [Figure 8] 1 is a perspective view of the vertical plate portion as viewed from the rear side. [Figure 9] 13 is a diagram showing an example in which an angle bar without a long hole is used as a support member. FIG. [Figure 10] 13A and 13B are diagrams showing modified examples of the fastening bolt. [Figure 11]13A and 13B are diagrams showing another modified example of the fastening bolt. [Figure 12] 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. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In the drawings referred to below, common members are designated by the same reference numerals, and redundant description thereof will be omitted.

[0018] FIG. 1 is a conceptual diagram showing an example of installation of a 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 an upper floor slab 100, i.e., the ceiling space of a lower floor. More specifically, the support device 1 is disposed so as to cross between a pair of adjacent suspension bolts 110, 110 in a state in which a ceiling-installed object 120 has already been installed in the ceiling space by each of a plurality of 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 by using the existing suspension bolts 110, 110 without driving new post-installed anchors or the like into the upper floor slab 100. The ceiling-installed objects 120, 120 supported by the existing suspension bolts 110, 110 are ceiling-installed air conditioners, various piping, cable racks, etc.

[0019] As shown in FIG. 1, the support device 1 includes a support member 2 disposed across a pair of hanging bolts 110, 110 and attached to each of the pair of hanging bolts 110, 110, and fixing members 3, 3 for fixing 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 for fixing 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 a bolt member 210 that supports a supported object 220 in a suspended state to the support member 2. The bolt member 210 supports the supported object 220 at its lower end. In FIG. 1, a cylindrical pipe is illustrated as an example of the supported object 220.

[0020] FIG. 2 is an enlarged perspective view of the support device 1. The support member 2 is a long metal member arranged to cross between the pair of hanging bolts 110, 110. The support member 2 is, for example, made of an angle material having 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 surface) 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 a substantially right angle. Such a support member 2 is arranged to cross between the pair of hanging bolts 110, 110 in the horizontal direction, for example. 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.

[0021] 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 the long hole 23 formed therein, and the horizontal plate portion 22 has the long hole 24 formed therein. Such perforated angle materials are available in large quantities, which has the advantage that the support member 2 can be obtained at low cost. The support member 2 utilizes the long holes 23 formed in the vertical plate portion 21 as bolt insertion holes.

[0022] 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 itself and 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.

[0023] Fig. 3 is a diagram showing an example of the configuration of the fixing member 3. Note that Fig. 3(a) and (b) show the fixing member 3 as viewed from different directions.

[0024] 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 parallel to each other, which 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, in 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.

[0025] The fastening bolt 5 is a bolt having an overall T-shape, as shown in Figures 3(a) and (b), for example. 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 protruding from the bolt insertion hole 44 to the opposite side of the clamping member 4.

[0026] The clamping nut 6 is a locking nut including 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 arranged to protrude inward from the screw hole of the nut body 61. For example, the friction pieces 63, 63 are formed by making two parts of a ring-shaped metal member protrude 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 clamping nut 6 engages with the male screw portion 5b to generate a prevailing torque, thereby preventing the male screw portion 5b and the clamping nut 6 from freely rotating. As a result, the clamping nut 6 exhibits an anti-loosening function. However, if the clamping nut 6 is firmly tightened using a power tool or the like, the clamping nut 6 can be further screwed into the male thread portion 5b.

[0027] FIG. 4 is a diagram illustrating an example of how the fixing member 3 is assembled to the support member 2. As shown in FIG. 4(a), the fixing member 3 assembled with the clamping member 4, the fastening bolt 5, and the fastening nut 6 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. The width W2 of the bolt head 5a is substantially 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 in a state in which the clamping member 4, the fastening bolt 5, and the fastening nut 6 are assembled in advance, 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 FIG. 4(a). As a result, 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, as shown in FIG. 4(b).

[0028] FIG. 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 FIG. 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. Meanwhile, 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. 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 clamping nut 6 is tightened. That is, the fastening bolt 5 makes the bolt head 5a function as the co-rotation prevention means 7.

[0029] FIG. 6 is a diagram showing the co-rotation prevention function by the co-rotation prevention means 7. FIG. 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 FIG. 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. That is, the co-rotation prevention means 7 prevents the bolt head 5a and the male screw portion 5b from co-rotating. Thereafter, 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 therefore the tightening nut 6 can be tightened against the male screw portion 5b.

[0030] FIG. 7 is a diagram showing a 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 interval 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 an electric 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. Accordingly, the bolt head 5a also rotates together with the tightening nut 6, and the end of the bolt head 5a 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 rear 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 effectively works, the co-rotation of the male screw portion 5b is restricted. Therefore, thereafter, the tightening nut 6 can be satisfactorily tightened to 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.

[0031] In this manner, 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 the support device 1 is installed 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 the 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 the high-altitude work, and there is also an advantage that the work can be performed safely.

[0032] Furthermore, in the support device 1 of this embodiment, the clamping member 4, the fastening bolt 5, and the 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, it is not necessary to assemble the clamping member 4, the fastening bolt 5, and the fastening nut 6 individually for work at height, and in this respect, too, the work efficiency is excellent. In addition, since the clamping member 4, the fastening bolt 5, and the fastening nut 6 can be preassembled, there is also the advantage that the fastening bolt 5 and the fastening nut 6 will not drop during work at height, and work can be carried out safely.

[0033] Furthermore, in the support device 1 of this embodiment, by arranging the pair of suspension bolts 110, 110 to be joined to the surface of the vertical plate portion 21 of the support member 2, it is possible to insert the fixing member 3 into the long hole 23 from the surface side of the vertical plate portion 21, and also when tightening the clamping nut 6, the tightening work can be performed from the surface side of the vertical plate portion 21. In other words, the support device 1 of this embodiment makes it possible to proceed with work by accessing the installation surface including the pair of suspension bolts 110, 110 from only one direction, making it possible to efficiently perform work at height.

[0034] In addition, in the case of the embodiment in which 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 reliably with sufficient strength. As described above, in the support device 1 of the 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 fastened. Therefore, the fastening nut 6 can be fastened reliably to the male screw portion 5b with sufficient strength, and it is possible to prevent insufficient fastening strength in advance.

[0035] In particular, since the fastening bolt 5 is equipped with anti-rotation 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 the work can be performed simply and efficiently even in cases where it is difficult to secure sufficient working space.

[0036] Furthermore, the support device 1 of this embodiment uses a locking nut as the fastening nut 6 attached to the male screw portion 5b of the fastening bolt 5. Therefore, the fastening nut 6 fastened to the male screw portion 5b with sufficient strength will not loosen after the fastening work is performed. For example, even if vibration is transmitted to the hanging bolt 110 or the support member 2, the fastening state between the fastening bolt 5 and the fastening 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 fastening nut 6 uses a locking nut, even if the hanging bolt 110 vibrates continuously for a long period of time, the fastening state will never loosen and sufficient fastening strength can be maintained.

[0037] 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 sandwiched 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 down from the support member 2 between the pair of hanging bolts 110, 110, and the effort of newly installing a post-installed anchor 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.

[0038] 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 modified versions of the embodiment described above.

[0039] For example, in the above embodiment, a case has been exemplified in which a perforated angle iron is used as the support member 2, in which long holes 23, 24 having a predetermined length in the longitudinal direction of the support member 2 are formed at predetermined intervals in each of the vertical plate portion 21 and the horizontal plate portion 22. However, the support device 1 is not necessarily limited to one that uses a perforated angle iron as the support member 2.

[0040] FIG. 9 is a diagram showing an example in which an angle bar without the long holes 23, 24 is used 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 support member 2 does not have the above-mentioned long holes 23, 24. 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 the vertical plate portion 21 from the factory to the construction site. The bolt insertion hole 29 drilled and formed using an electric drill or the like is a circular hole, as shown in FIG. 9(a), unlike the above-mentioned long hole 23. In this case, when the fixing member 3 is attached 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. 9(a), with the clamping member 4, the fastening bolt 5, and the fastening nut 6 separated from each other, the male thread portion 5b of the fastening bolt 5 is inserted into the bolt insertion hole 29 from the back surface 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 surface 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.

[0041] In the above embodiment, the fastening bolt 5 is a bolt having a T-shape as a whole. However, the fastening bolt 5 is not limited to a T-shape.

[0042] Fig. 10 is a diagram showing a modified example of the fastening bolt 5. As shown in Fig. 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 is set to be equal to or longer 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, thereby forming the co-rotation prevention means 7.

[0043] FIG. 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 with a co-rotation prevention member 52 attached to the head 51 of the bolt. 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 wall portions 54, 54 can accommodate the head 51 of the hexagonal bolt inside thereof, and the inner surfaces of the wall portions 54, 54 can be engaged with the side surfaces of the head 51. The flat plate portion 53 has a U-shaped notch portion 55 formed at an end in the longitudinal direction, and the notch portion 55 can accommodate the male screw portion 5b of the hexagonal bolt. 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 portion 55. That is, in the fastening bolt 5, the co-rotation prevention means 7 is 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, since the fastening bolt 5 can be realized using a general hexagonal bolt, there is an advantage in that the parts cost can be kept low.

[0044] Also, in the above embodiment, the case where the support device 1 is installed below the upper floor floor slab 100 has been exemplified. 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 suspension bolt by driving in 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.

[0045] Further, the support device 1 in the above embodiment has been exemplified as a form 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.

[0046] FIG. 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 suspension 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 suspension bolts 110, 110 installed on both sides of the structural beam 101. In addition, the support device 1 shown in FIG. 12 is arranged so that the horizontal plate portion 22 is located at the upper end of the vertical plate portion 21 when the vertical plate portion 21 of the support member 2 is joined to the pair of suspension bolts 110, 110. 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 is capable of supporting the supported object 220 not only in a state in which it is suspended from the support member 2, but also in a state in which 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 becomes unnecessary to install the suspension bolts 110 on the structural beam 101, so that the supported object 220 can be installed appropriately without reducing the strength of the structural beam 101.

[0047] In the above embodiment, an angle material (angle iron) having an L-shaped cross section is used as the support member 2. However, the support member 2 is not limited to an angle material having an L-shaped cross section. For example, the support member 2 may be a lip channel steel or a light channel steel.

[0048] In the above embodiment, an example has been described in which the co-rotation prevention means 7 engages with the horizontal plate portion 22 located on the back surface side of the vertical plate portion 21 to prevent the fastening bolt 5 from co-rotating. However, the co-rotation prevention means 7 is not necessarily limited to engaging with the horizontal plate portion 22. For example, a structure for preventing co-rotation of the fastening bolt 5 may be provided by providing a protruding engagement portion on the back surface side of the vertical plate portion 21 and engaging the co-rotation prevention means 7 with the engagement portion.

[0049] 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 when 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.

[0050] Furthermore, in the above embodiment, an example has been 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 disposed in such a state 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 of the fastening bolt 5 is further inserted through each of the first clamping member and the second clamping member, and the fastening nut 6 is attached to the tip of the fastening bolt 5. It is clear that even with such a structure, the action and effect described in the above embodiment can be achieved. [Explanation of symbols]

[0051] 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

1. 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 the fastening nut has a co-rotation prevention means that engages the bolt head with the support member when the fastening nut is tightened, and prevents the male threaded portion from co-rotating with the fastening nut.

2. 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. 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. 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. 5. The support device according to claim 1, wherein the fastening nut is a locking nut.

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