Mounting method of diagonal member

Abstract

To provide a mounting method of a diagonal member capable of dispensing with a chain block or the like by dispensing with hanging ropes different in length in oblique hanging of the diagonal member.SOLUTION: .In a mounting method of a diagonal member, a diagonal member 1 is horizontally lifted by one continuous wire 51 hung on a pulley 52 lifted by a crane, and one joint part 22 of the diagonal member 1 is brought close to one gusset plate 9 of a pair of gusset plates 9,9 for mounting the diagonal member fixed to a building, insert the long bolts 80 through one of the corresponding bolt holes in the splice plate 4 attached to one joint 22 and the gusset plate 9, and by allowing the position of the continuous wire 51 on pulley 52 to change as pulley 52 rises or falls, the long screw 80 acts as a pivot to tilt the diagonal member 1, then brings the two joints 22,22 of the brace 1 to the pair of gusset plates 9,9.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a method for attaching a diagonal member such as a buckling restrained brace to a gusset plate of a building. [Background technology]

[0002] A diagonal member such as a buckling restraint brace is lifted at an angle, with both ends of the member attached to a gusset plate fixed to the building. Conventionally, diagonal lifting of a diagonal member has been achieved by using lifting lines of different lengths or by using a chain block. Patent Document 1 discloses a lifting jig that uses a restricting part to restrict the horizontal movement of the lifting wires, even when at least two lifting wires spaced apart from each other are slung in common on a crane's sling. However, this configuration does not allow the load to be lifted at an angle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7195902 Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional techniques, in order to suspend a diagonal member at an angle, as described above, it was necessary to use suspending devices of different lengths or to use a chain block.

[0005] An object of the present invention is to provide a method for attaching a diagonal member that eliminates the need for suspending ropes of different lengths when suspending a diagonal member obliquely, and also eliminates the need for a chain block or the like. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, the method of installing a diagonal member of this invention is characterized by including the steps of lifting the diagonal member horizontally using a continuous hoisting rope hung on a hoisting part that is lifted by a crane, bringing one joint of the diagonal member close to one of a pair of gusset plates for installing the diagonal member that are fixed to the building, passing a rod-shaped material through one of the corresponding bolt insertion holes of the splice plate attached to the one joint and the one gusset plate, allowing the position where the continuous hoisting rope is hung on the hoisting part to change by raising or lowering the hoisting part, tilting the diagonal member using the rod-shaped material as a rotation axis, and bringing both joints of the diagonal member close to the pair of gusset plates.

[0007] With the above method, the rod-shaped material serves as the axis of rotation, and the position at which the continuous sling rope is attached to the sling portion is allowed to change as the sling portion is raised or lowered, thereby tilting the diagonal material, thereby eliminating the need for slings of different lengths and also eliminating the need for chain blocks, etc.

[0008] After bringing both joints of the diagonal member close to the pair of gusset plates, another rod-shaped member may be passed through one of the corresponding bolt insertion holes of the other gusset plate in the pair of gusset plates and the splice plate attached to the other joint.

[0009] The rod-shaped material and the other rod-shaped material may be long screws without heads or long screws with heads, and in the case of long screws without heads, nuts may be attached to both ends, and in the case of long screws with heads, a nut may be attached to one side, and by rotating the nuts, the diagonal material may be pulled toward the pair of gusset plates.

[0010] The rod-shaped member and the other rod-shaped member may be pulled in from the gusset plate side, thereby drawing the diagonal member toward the pair of gusset plates.

[0011] The rod-shaped member and the other rod-shaped member are long screws, and nuts may be attached to the diagonal member sides of these long screws, and these long screws may be pulled in from the gusset plate side.

[0012] The diameter of the other rod-shaped material may be smaller than the diameter of the rod-shaped material, which minimizes deviation of the rotation center when the rod-shaped material serves as the rotation axis, and makes it easy to pass the other rod-shaped material through even if there is some deviation in the overlap of the corresponding bolt insertion holes on the other gusset plate.

[0013] The suspending portion may be made of a pulley, and the continuous suspending rope may be hung on the pulley, and the position at which the continuous suspending rope is hung on the suspending portion may be changed by rotating the pulley to tilt the diagonal member.

[0014] The suspending portion comprises a sliding portion, and the continuous suspending rope is hung on this sliding portion, and the position at which the continuous suspending rope is hung on the suspending portion may be changed by the sliding, thereby tilting the diagonal member.

[0015] A mark may be provided on the continuous sling rope at a position where the continuous sling rope is to be engaged with the sling portion when the diagonal member is tilted at a predetermined angle. In this way, the lifting and lowering operation of the crane can be stopped when the mark reaches the position where the diagonal member is to be engaged with the sling portion, thereby allowing the diagonal member to be tilted at a predetermined angle. [Effects of the Invention]

[0016] The present invention has the effect of eliminating the need for suspending ropes of different lengths when suspending diagonal members, and also eliminating the need for chain blocks, etc. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is an explanatory diagram showing the configuration of the lifting tool and the building side used in the diagonal member installation method of the embodiment. FIG. [Figure 2] FIG. 1 is an explanatory diagram showing an example of a buckling restraint brace as a diagonal member, and showing the suspended state of this buckling restraint brace. [Figure 3]An explanatory diagram showing the operation of passing a long screw through one of the corresponding bolt insertion holes of a splice plate and one of the gusset plates attached to one of the joints of a diagonal member lifted horizontally, where (A) is a view from the end of the one of the joints, from the direction in which the long screw appears long, and (B) is a view from the direction in which the one of the joints and one of the gusset plates appear to overlap. [Figure 4] An explanatory diagram showing the state in which both joints of a diagonal member lifted obliquely are brought close to a pair of gusset plates. [Figure 5] This is an explanatory diagram showing the operation of rotating nuts threaded onto both ends of a long screw passed through a bolt insertion hole at one joint side of a diagonal member lifted at an angle to pull the diagonal member toward the gusset plate. DETAILED DESCRIPTION OF THE INVENTION

[0018] An embodiment of the present invention will be described below with reference to the accompanying drawings. As shown in Fig. 1, in the method for installing a diagonal member according to this embodiment, a diagonal member 1 is initially lifted horizontally using a lifting tool 5. Two ring-shaped hooks 11, 11 are welded to the top surface of the diagonal member 1, spaced apart from each other along the long side of the diagonal member 1. A continuous wire 51, which serves as a continuous sling and is hooked onto the hooks 11, 11 with a hook or the like, is hung on a pulley 52 (hanging part) of the lifting tool 5, allowing the diagonal member 1 to be lifted horizontally or diagonally. The pulley 52 is hooked onto, for example, a crane hook 8.

[0019] A buckling-restrained brace is used as an example of the diagonal member 1. As shown in Figure 2, the diagonal member 1, which is a buckling-restrained brace, has a structure including a core member 2 and a pair of restraint members 3. The core member 2 has a steel plate-like body and joints 22 located at both ends of the plate-like body in the longitudinal direction and joined to other components. The core member 2 is fixed to the building frame with bolts inserted through bolt insertion holes formed in the joints 22. The joints 22 are fixed by welding plate pieces extending in the longitudinal direction of the plate-like body and arranged perpendicular to the extensions extending from both ends of the plate-like body, resulting in a generally cross-shaped cross section consisting of vertical and horizontal plate portions. The restraint members 3 are located opposite the weak-axis surfaces of the core member 2, which are perpendicular to the weak-axis direction. Each restraint member 3 includes a box-shaped member 31 and a hardened member such as concrete (not shown).

[0020] When lifting the diagonal member 1, the splice plate 4 is attached at least to the outdoor side of the vertical plate portion above or below the horizontal plate portion in the generally cross-shaped cross section of the joint 22 with bolts and nuts, using the insertion holes of the vertical plate portion and the bolt insertion holes of the splice plate 4. In this embodiment, the splice plate 4 is attached to the outdoor side of the vertical plate portion above and below the horizontal plate portion in the generally cross-shaped cross section of the joint 22, and to the upper and lower surfaces of the outdoor horizontal plate portion. The splice plate 4 is fixed to the gusset plate 9 for attaching the diagonal member with bolts and nuts, and is a component that secures the joint 22 to the gusset plate 9. The end faces of the gusset plate 9 are also generally cross-shaped, and the joint 22 and the gusset plate 9 are fixed by butting their cross-shaped ends against each other.

[0021] The diagonal member 1 with the splice plate 4 attached as described above is lifted horizontally using a lifting tool 5, and this diagonal member 1 is positioned on the outdoor side (near side) of one (lower) gusset plate 9 of a pair of gusset plates 9, 9 fixed to a building, as shown in FIG. 1 . At this time, a specific bolt insertion hole in one gusset plate 9 is aligned with a bolt insertion hole (hole through which the same bolt is passed) corresponding to the specific bolt insertion hole in the splice plate 4 attached to one (lower) joint 22 fixed to the one gusset plate 9. In this embodiment, of the bolt insertion holes on the gusset plate 9 side of the splice plate 4 fixed to the vertical plate portion above the horizontal plate portion attached to the one joint 22, the bolt insertion hole closest to the joint 22 corresponds to the specific bolt insertion hole in one gusset plate 9.

[0022] As described above, after aligning the specific bolt holes of the gusset plate 9 corresponding to the diagonal member 1 in the horizontally suspended state with the bolt holes formed in the splice plate 4, headless long screws 80 (rod-shaped members) having a diameter similar to that of the connecting bolts are inserted into these bolt holes, as shown in Figures 3(A) and 3(B). Nuts 81 are then threaded onto both ends of the long screws 80. The lifting tool 5 is then raised using a crane. During this raising operation, the diagonal member 1 rotates around the long screws 80, as shown in Figure 4, and is lifted diagonally, gradually bringing the other (upper) joint 22 closer to the other (upper) gusset plate 9. Note that headed long screws can be used instead of headless long screws 80.

[0023] When the inclination angle of the diagonal member 1 reaches the designed inclination angle, the lifting of the lifting tool 5 by the crane is stopped. After both joints 22, 22 of the diagonal member 1 are brought close to the pair of gusset plates 9, 9 in this way, another long screw 80A (rod-shaped material) is passed through one corresponding bolt insertion hole in each of the splice plate 4 attached to the other joint 22 and the other gusset plate 9 of the pair of gusset plates 9, 9, and nuts 81A are screwed onto both ends of this long screw 80A. The other long screw 80A has a smaller diameter than the long screw 80.

[0024] Next, the nuts 81, 81A on the gusset plate 9 side are turned using a ratchet to bring the joint 22 of the diagonal member 1 closer to the gusset plate 9, as shown in Figure 5. Once the splice plate 4 attached to the joint 22 is close to the gusset plate 9, the joining bolts are passed through these bolt insertion holes and the nuts are screwed in to perform the fastening operation. The long screws 80, 80A are removed from the bolt insertion holes where they were inserted, and the joining bolts and nuts are fastened.

[0025] With the above method, the long screw 80 serves as the axis of rotation, and the lifting of the pulley 52, which is the suspending part, allows the position at which the single continuous wire 51 is hung on the pulley 52 to change, thereby tilting the diagonal member 1, eliminating the need for suspending lines of different lengths and also eliminating the need for a chain block or the like. The pulley 52 may be configured so that its rotation can be switched between permitted and prohibited by remote control, so that the pulley 52 is prohibited from rotating when the diagonal member 1 is suspending horizontally, and is permitted to rotate when the diagonal member 1 is suspending obliquely.

[0026] Furthermore, since the other long screw 80A has a smaller diameter than the long screw 80, the deviation of the center of rotation when rotating around the long screw 80 as the rotation axis can be minimized, and even if there is a slight deviation in the overlap of the bolt insertion holes of the corresponding gusset plate 9 and splice plate 4 on the other gusset plate 9 side, it becomes easy to pass the other long screw 80A through.

[0027] In the above example, the nuts 81, 81A are turned using a ratchet, but this is not limiting. For example, by using a socket with a longer cylindrical length to accommodate the long screws 80, 80A, and attaching this socket to an electric / pneumatic rotary tool to quickly turn the nuts 81, 81A, the work of moving the joint 22 of the diagonal member 1 closer to the gusset plate 9 can be completed in a short time. Furthermore, by increasing the thread pitch of the long screws 80, 80A and increasing the distance traveled with one rotation of the nut, the work of moving the joint 22 closer to the gusset plate 9 can be further shortened.

[0028] The method is not limited to turning nuts 81, 81A to move joint 22 of diagonal member 1 closer to gusset plate 9. For example, nuts may be attached only to the diagonal member 1 side of long screws 80, 80A, and the long screws 80, 80A may be pulled from the gusset plate 9 side using a winch or human power to pull diagonal member 1 toward the pair of gusset plates 9, 9. Also, instead of long screws, a rod-shaped material or long bolt with a head on one end may be used, and the other end of this rod-shaped material or long bolt may be pulled from the gusset plate 9 side using a winch or human power to pull diagonal member 1 toward the pair of gusset plates 9, 9.

[0029] In the above example, the diagonal member 1 was tilted by raising the lifting tool 5 using a crane, but this is not limited to this. The diagonal member 1 may be tilted by lifting it horizontally up to the position of the upper gusset plate 9 of a pair of gusset plates 9, 9, inserting a long screw 80 into the upper gusset plate 9, and lowering the lifting tool 5 using a crane.

[0030] Furthermore, it is not limited to using pulley 52. ​​The suspending portion to which one continuous wire 51 is hung may be made of a sliding portion, and the position at which continuous wire 51 is hung on the suspending portion may be changed by sliding, thereby tilting diagonal member 1. The sliding portion may be hook 8 itself, which is lifted by a crane.

[0031] The continuous wire 51 is not limited to being hooked onto the two ring-shaped hooks 11, 11 provided on the upper surface of the diagonal member 1. For example, a fastening device such as a lashing belt may be attached to the boundary between the restraining member 3 of the diagonal member 1 and the joint 22, and this fastening device may be connected to both ends of the continuous wire 51.

[0032] Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiments within the same scope as the present invention or within an equivalent scope. [Explanation of symbols]

[0033] 1 : Diagonal material 2: Core material 3:Restraint material 4: Splice plate 5: Lifting tool 8: Hook 9: Gusset plate 11: Hook 22: Joint 31: Box-shaped member 51: Continuous wire 52: Pulley 80: Long screw 80A: Long screw 81: Nut 81A: Nut

Claims

1. A method for installing a diagonal member, comprising the steps of: lifting a diagonal member horizontally using a continuous hoisting rope attached to a hoisting part that is lifted by a crane; bringing one joint of the diagonal member close to one of a pair of gusset plates for installing the diagonal member that are fixed to the building; passing a rod-shaped material through one of the corresponding bolt insertion holes in the splice plate attached to the one joint and in the one gusset plate; allowing the position where the continuous hoisting rope is attached to the hoisting part to change by raising or lowering the hoisting part; tilting the diagonal member using the rod-shaped material as an axis of rotation; and bringing both joints of the diagonal member close to the pair of gusset plates.

2. 2. The method for installing a diagonal member according to claim 1, wherein after both joints of the diagonal member are brought close to the pair of gusset plates, another rod-shaped member is passed through one of the bolt insertion holes of the other gusset plate in the pair of gusset plates and the splice plate attached to the other joint.

3. 3. The method for installing a diagonal member according to claim 2, wherein the rod-shaped member and the other rod-shaped member are long screws without heads or long screws with heads, and a nut is attached to both ends of the long screws without heads, and a nut is attached to one side of the long screws with heads, and the diagonal member is pulled toward the pair of gusset plates by rotating the nut.

4. 3. The method for installing a diagonal member according to claim 2, characterized in that the rod-shaped member and the other rod-shaped member are pulled in from the gusset plate side, thereby pulling the diagonal member toward the pair of gusset plates.

5. 5. The method for installing a diagonal member according to claim 4, wherein the rod-shaped member and the other rod-shaped member are long screws, and nuts are attached to the diagonal member side of these long screws, and these long screws are pulled in from the gusset plate side.

6. The method for attaching a diagonal member according to any one of claims 2 to 5, wherein the diameter of the other rod-shaped member is smaller than the diameter of the rod-shaped member.

7. 2. A method for installing a diagonal member as described in claim 1, characterized in that the hanging part consists of a pulley, the continuous hanging rope is hung on this pulley, and the position at which the continuous hanging rope is hung on the hanging part is changed by rotating the pulley, thereby tilting the diagonal member.

8. 2. A method for installing a diagonal member as described in claim 1, characterized in that the hanging portion comprises a sliding portion, the continuous hanging rope is hung on this sliding portion, and the position at which the continuous hanging rope is hung on the hanging portion is changed by the sliding, thereby tilting the diagonal member.

9. 2. The method for installing a diagonal member according to claim 1, wherein a mark is provided on the position where the continuous suspension rope is attached to the suspension portion when the diagonal member is inclined at a predetermined angle.

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