Lifting tool

Abstract

To provide a lifting tool that can be applied to the lifting of a to-be-suspended object having a lifting-position interval longer than the length of a horizontal arrangement member, is capable of obliquely lifting the to-be-suspended object, and is able to solve a problem such as fusion when a hooking portion is provided on the to-be-suspended object itself.SOLUTION: A lifting tool 5 includes: a horizontal arrangement member 51 that has a first fixed position adjustment portion 51a on each of right and left sides and is horizontally suspended by a suspension rope 6; a pair of obliquely arranged members 52 each of which has a second fixed position adjustment portion 52a and is obliquely arranged, with one-end side thereof fixed to an arbitrary position on the first fixed position adjustment portion 51a; a fixing member 53 that fixes each obliquely arranged member 52 to each of the first fixed position adjustment portions 51a on the right and left sides via each second fixed position adjustment portion 52a; and a to-be-suspended-object connecting member 54 that is attached to the other-end side of each obliquely arranged member 52 and is connected to a to-be-suspended object 1.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a lifting tool for lifting an object to be lifted. [Background technology]

[0002] Patent Document 1 discloses a lifting jig that can regulate the horizontal movement of the suspension wires using a regulating part, even when at least two suspension wires are hung from a load at a distance and are commonly slung on a hanging part of a crane to lift the load.

[0003] In addition, a conventional hanging method involves suspending a horizontally positioned balance using a sling, and connecting the wire-like member hanging from this balance to the object to be hung, so that the wire-like member connected to the object to be hung is in as vertical a position as possible.

[0004] Furthermore, long components such as braces are lifted at an angle, and the joints at both ends are attached to gusset plates fixed to the building. For this reason, two ring-shaped hooks are welded to the top surface of the long component, spaced apart from each other along the long side of the component, and lifting lines of different lengths connected to the hooks are hung on the lifting hook of a crane to lift the component at an angle. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 7195902 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the hooks are no longer needed after the brace is installed on the building, and leaving them unsightly would reduce the efficiency of construction work. Furthermore, if the hooks were to be removed by gas cutting or other methods, the labor required would reduce the efficiency of construction work. Furthermore, in a lifting device structure using a balance, for example, if the object to be lifted is a brace that is longer than the balance and the distance between the wires connected to the brace is longer than the length of the balance, the wire-like member hanging from the balance would be stretched at an angle. To avoid this diagonal stretch and keep the wire-like member approximately vertical, it becomes necessary to provide a balance that is the same length as the brace. Furthermore, the lifting jig disclosed in Patent Document 1 cannot solve these problems.

[0007] The object of this invention is to provide a lifting device that can be applied to lifting an object having a lifting position interval longer than the length of a horizontally positioned member, that can also lift the object at an angle, and that can solve problems such as melting when a hook is provided on the object to be lifted itself. [Means for solving the problem]

[0008] In order to solve the above problems, the lifting tool of the present invention has a first fixing position adjustment part that can change the fixing position in the lateral direction at each of the left and right parts, and is suspended horizontally by a suspension rope. a pair of inclined placement members each having the same length or different lengths, each having a second fixed position adjustment section whose fixed position and fixed angle are variable, and which are fixed at an arbitrary position and at an arbitrary angle on the first fixed position adjustment section and are inclined; a fixing member that fixes each of the inclined arrangement members to the first fixing position adjustment portion via each of the second fixing position adjustment portions; a rotation prevention means for preventing rotation of each of the inclined arrangement members around the fixed member; and a suspended object connecting member attached to each of the inclined arrangement members and connected to the suspended object.

[0009] With the above configuration, by causing the bottom ends of each of the inclined positioning members to extend outward beyond the left and right ends of the horizontal positioning member and fixing each of the inclined positioning members to the left and right first fixing position adjustment members via the second fixing position adjustment members with fixing members, the bottom ends of each of the inclined positioning members can be positioned approximately directly above the connection point of the suspended object. This allows the suspended object connecting members attached to each of the inclined positioning members to hang down approximately vertically and connect to the suspended object. This also allows for the suspension of suspended objects with a suspension position interval longer than the length of the horizontal positioning members to be performed favorably. Furthermore, this eliminates the need for hooks on the suspended object itself, eliminating problems such as meltdown. Furthermore, even when the weight of the suspended object is applied to the inclined positioning members, the rotation prevention means prevents each of the inclined positioning members from rotating around the fixing member. Furthermore, by adjusting the position of the second fixed position adjustment portion of the inclined positioning member relative to the left and right first fixed position adjustment portions, it becomes possible to lift the object to be lifted at an angle without using a chain block or the like.

[0010] The rotation-preventing means may be the fixing member made of a high-strength bolt that generates a frictional force that prevents rotation of the tilt-mounted member, thereby preventing rotation of each tilt-mounted member about the high-strength bolt by the simple operation of tightening the high-strength bolt.

[0011] The rotation-preventing means may comprise two first fixing position adjustment parts, one above the other, positioned parallel to each other at the left and right locations, and two fixing members attached to the two first fixing position adjustment parts via the second fixing position adjustment parts of each of the inclined placement members. In this way, the rotation of each of the inclined placement members around the fixing members can be prevented by a simple operation of attaching the fixing members to the two first fixing position adjustment parts at each of the left and right locations.

[0012] The rotation-preventing means may comprise a contact member attached to the horizontal positioning member or each of the inclined positioning members, and the contact member attached to the horizontal positioning member may come into contact with each of the inclined positioning members, thereby preventing rotation of each of the inclined positioning members that would otherwise be caused by the load of the suspended object. In this way, rotation of the inclined positioning members can be prevented with a simple structure in which the contact member is added.

[0013] The rotation prevention means may be a support rod positioned between the pair of inclined positioning members to prevent the inclined positioning members from approaching each other. In this way, the simple task of attaching the support rod can prevent the inclined positioning members from rotating due to the weight of the suspended object. [Effects of the Invention]

[0014] The present invention makes it possible to suitably lift an object having a lifting position interval longer than the length of the horizontally positioned member, and also makes it possible to lift the object at an angle, and furthermore, it has the effect of eliminating problems such as melting when a hook is provided on the object to be lifted itself. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 2 is an explanatory diagram of a front view of the lifting tool of the embodiment. [Figure 2] FIG. 1 is a perspective explanatory diagram of a buckling restraint brace that is the object to be suspended. [Figure 3] FIG. 10 is an explanatory diagram showing how a buckling restraint brace is lifted obliquely by the lifting tool of the embodiment. [Figure 4] FIG. 10 is an explanatory diagram showing how the lifting tool of the embodiment is attached to a horizontally disposed buckling restraint brace. [Figure 5] FIG. 10 is an explanatory front view of a lifting tool according to another embodiment. [Figure 6] FIG. 10 is an explanatory front view of a lifting tool according to another embodiment. [Figure 7] FIG. 10 is an explanatory front view of a lifting tool according to another embodiment. [Figure 8] FIG. 10 is an explanatory front view of a lifting tool according to another embodiment. [Figure 9] 1 is an explanatory diagram showing a schematic configuration of a lifting tool according to an embodiment of the present invention, which is fabricated using H-shaped steel. DETAILED DESCRIPTION OF THE INVENTION

[0016] (Embodiment 1) DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] The present invention will be described in detail below with reference to the accompanying drawings. As shown in Fig. 1, a lifting tool 5 according to the present embodiment includes a horizontally positioned member 51, a pair of inclinedly positioned members 52, 52, fixing members 53, 53, and suspended object connecting members 54, 54.

[0017] The horizontally positioned member 51 is, for example, a long member that is suspended horizontally by a sling 6 hung on a hook 8 of a crane, and has first fixed position adjustment parts 51a on both the left and right sides that allow the fixed position to be adjusted laterally (horizontally). The horizontally positioned member 51 is set shorter than the interval between the suspension positions of the long suspended object 1.

[0018] The horizontally positioned member 51 is made of, for example, a lip channel steel, and is used by positioning the flange portions (opposing surface portions) of the lip channel steel above and below. The first fixed position adjusting portion 51a is made of, for example, a long hole formed portion that penetrates the web portion (connecting portion of the opposing surface portions) of the lip channel steel and extends in the longitudinal direction of the horizontally positioned member 51.

[0019] Two ring portions 51b, to which the sling cords 6 are connected, are welded and fixed to the upper surface of the upper flange portion of the lip channel steel in the horizontal placement member 51. The two ring portions 51b are positioned equidistant from the center of the horizontal placement member 51 in the longitudinal direction, and the angle formed by the two sling cords 6 positioned between the ring portions 51b and the hooks 8 is, for example, 60 degrees.

[0020] The pair of inclined placement members 52, 52 are elongated members of the same length, each having a second fixed position adjustment portion 52a that changes the fixed position and angle in an oblique direction, and one end of each is fixed to any position and at any angle on the first fixed position adjustment portion 51a so as to be inclined. The other end of each inclined placement member 52 can be positioned horizontally outward of the end of the horizontal placement member 51.

[0021] Each tilted positioning member 52 is made of, for example, a lip channel steel, and is used by positioning the flanges of the lip channel steel above and below. The first fixed position adjustment portion 51a is made of a slot that penetrates the web of the lip channel steel and extends in the longitudinal direction of the tilted positioning member 52. Each tilted positioning member 52 has the web of the lip channel steel in surface contact with the web of the lip channel steel of the horizontal positioning member 51. By manufacturing each tilted positioning member 52 using such steel material, the rigidity of the tilted positioning member 52 is increased.

[0022] Each fixing member 53 fixes each inclined positioning member 52 to the first fixing position adjustment portion 51a via its second fixing position adjustment portion 52a. In this embodiment, the fixing member 53 is composed of a bolt sized to fit through the elongated holes of the first fixing position adjustment portion 51a and the second fixing position adjustment portion 52a and a nut threaded onto the bolt. In this embodiment, the fixing member 53 is composed of a high-strength bolt with a hexagonal head that generates a frictional force to prevent rotation and functions as a rotation-preventing means for preventing rotation of each inclined positioning member 52 around the bolt. In other words, rotation of the inclined positioning member 52 is prevented by the frictional force generated by the surface-pressure contact between the web portions of the inclined positioning member 52 and the horizontal positioning member 51, which is caused by the high-strength bolt and the nut.

[0023] The suspended object connecting member 54 comprises a wire portion 54a attached to the other end of each inclined arrangement member 52 and connected to the suspended object 1, and a fastener 54b attached to the wire portion 54a. The fastener 54b is, for example, a lashing belt wound around the end suspension position of the suspended object 1 and is tightened using a ratchet mechanism. In this embodiment, the wire portion 54a is passed through the elongated hole of the second fixed position adjustment portion 52a.

[0024] The suspended object 1 is, for example, a buckling-restrained brace. As shown in FIG. 2 , this buckling-restrained brace has a structure including, for example, a core member 2 and a pair of restraint members 3. The core member 2 includes a steel plate and joints 22 located at both ends of the plate in the longitudinal direction and joined to other members. 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 formed by welding plate pieces extending in the longitudinal direction of the plate and arranged perpendicular to the extensions extending from both ends of the plate, thereby forming a generally cross-shaped cross section. The restraint members 3 are located opposite the weak-axis surface of the core member 2, which is 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).

[0025] With the lifting tool 5 configured as described above, by fixing one end of each of the inclined positioning members 52 to the left and right first fixing position adjustment members 51a via the second fixing position adjustment members 52a with fixing members 53 while the other ends of the inclined positioning members 52 are respectively projecting outward beyond the left and right ends of the horizontal positioning member 51, it is possible to position the other end of each of the inclined positioning members 52 approximately directly above the connection point of the suspended object 1. This allows the wire portion 54a of the suspended object connecting member 54 attached to the other end of each inclined positioning member 52 to hang down approximately vertically, and the fastener 54b can be connected to the suspended object 1. This also makes it possible to suitably lift a suspended object 1 having a suspension position interval longer than the length of the horizontal positioning member 51, and eliminates the need to provide a hook on the suspended object 1 itself, thereby eliminating problems such as its melting. Furthermore, if a long object to be suspended 1 is suspended directly with a sling without using this lifting tool 5, the sling will spread out at a large angle. However, by using the lifting tool 5, the problem of this spreading, or the problem of the vertical distance between the hook 8 and the object to be suspended 1 becoming longer in order to avoid this spreading, can be solved.

[0026] Furthermore, even if the load of the suspended object 1 is applied to the inclined positioning members 52, the fixing members 53 (rotation preventing means) made of high-strength bolts prevent each inclined positioning member 52 from rotating about the fixing members 53. According to this embodiment in which the rotation preventing means is the fixing members 53 made of high-strength bolts, the rotation of each inclined positioning member 52 can be prevented simply by the simple operation of tightening the bolts.

[0027] Furthermore, as shown in FIG. 3 , the lifting tool 5 can be used to lift the object 1 at an angle by adjusting the position and angle of each inclined positioning member 52 relative to the left and right first fixed position adjusting members 51a via the second fixed position adjusting members 52a. In the example shown in FIG. 3 , the two inclined positioning members 52 are different in length, and the inclined positioning member 52 connected to the lower end of the inclined position of the object 1 is longer than the other inclined positioning member 52. The inclined positioning members 52 can be easily replaced by manipulating the fixing members 53. Furthermore, such an oblique lifting of the object 1 can be performed without using a chain block or the like. If the different lengths of the two inclined positioning members 52 cause an imbalance in the weight balance between the left and right sides of the lifting tool 5, weights may be added or the size of the steel may be made different so that the weights of the two inclined positioning members 52 are as equal as possible.

[0028] As shown in Figure 4, when attaching the lifting device 5 to the suspended object 1 placed in a horizontal position, the fixed position and tilt angle of each inclined positioning member 52 relative to the first fixed position adjustment portion 51a are calculated in advance based on the length of the connection interval between the wire portions of the suspended object 1, the tilt angle of the suspended object 1, etc., and each inclined positioning member 52 is fixed at a predetermined angle using fixing members 53 at the position determined by this calculation.

[0029] (Embodiment 2) Another embodiment of the present invention will now be described with reference to the accompanying drawings. As shown in FIG. 5 , two first fixing position adjustment portions 51a are formed parallel to each other, one above the other, on the left and right sides of the horizontally positioned member 51 of the lifting tool 5 in this embodiment. A fixing member 53 (bolt) is attached to each first fixing position adjustment portion 51a, thereby preventing rotation of each inclined positioning member 52 around the fixing member 53. That is, in this embodiment, the rotation prevention means is constituted by two first fixing position adjustment portions 51a, one above the other, positioned parallel to each other on the left and right sides, and two fixing members 53 (bolts) attached to the two first fixing position adjustment portions 51a via the second fixing position adjustment portions 52a of each inclined positioning member 52. Rotation of each inclined positioning member 52 can be prevented by a simple operation of tightening these fixing members 53 multiple times. These bolts do not need to be high-strength bolts; they need only be strong enough to withstand the shear load of the object to be suspended 1.

[0030] (Embodiment 3) Another embodiment of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 6 , in this embodiment, holes 51c (female threads) are formed near the elongated holes of the left and right first fixed position adjustment sections 51a of the horizontal positioning member 51 of the lifting tool 5, penetrating the web portion of the lip channel steel constituting the horizontal positioning member 51. Pins 51d (screws, etc.) can be threaded into these holes 51c. The pins 51d contact the upper or lower flanges of each inclined positioning member 52, thereby preventing rotation of each inclined positioning member 52. That is, in this embodiment, the rotation-preventing means comprises pins 51d (contact members) detachably attached to the horizontal positioning member 51 and contacting each inclined positioning member 52 that tends to rotate due to the load of the suspended object 1 to prevent rotation of the inclined positioning member 52. The holes 51c and pins 51d may be dedicated pairs, one for each of the left and right, that are tailored to a specific suspended object 1, or multiple pairs that can be used for any suspended object 1. The same applies to other examples of contact members shown below.

[0031] The contact member is not limited to the pin 51d. For example, as shown in FIG. 7 , it may be a hinge-like member 51e, one half of which is fixed to the upper or lower flange of the lip channel steel constituting the horizontal positioning member 51. The other half of the hinge-like member 51e may be extended by pivoting to contact each of the tilted positioning members 52 attempting to rotate, thereby preventing the rotation of the tilted positioning members 52. Furthermore, instead of the hinge-like member 51e, the extended portion of a telescopic member such as a pantograph may be extended to contact each of the tilted positioning members 52 attempting to rotate, thereby preventing the rotation of the tilted positioning members 52. Furthermore, the contact member may be a plate-like member that is attached to and detached from the upper or lower flange of the lip channel steel constituting the horizontal positioning member 51, for example, by a bolt. Furthermore, the contact member may be a plate-like member that can be slidably attached to and detached from a groove formed in the upper or lower flange of the lip channel steel constituting the horizontal positioning member 51.

[0032] Furthermore, the contact members are not limited to those attached to the horizontally positioned member 51, but may be contact members attached to each of the inclined positioned members 52 and come into contact with the horizontally positioned member 51 when the inclined positioned member 52 rotates.

[0033] (Embodiment 4) Another embodiment of the present invention will now be described with reference to the accompanying drawings. As shown in Fig. 8, the lifting tool 5 of this embodiment includes a support rod 55 disposed between the two inclined positioning members 52 to prevent the inclined positioning members 52 from approaching each other. The support rod 55 may be fixed with a bolt, for example, by utilizing the second fixed position adjustment portion 52a of each inclined positioning member 52, or the support rod 55 may be fixed by hooking a hook-shaped locking portion provided on the support rod 55 onto a protrusion (not shown) provided at a predetermined position on the inclined positioning member 52. In this way, the simple task of attaching the support rod 55 can prevent each inclined positioning member 52 from rotating due to the weight of the object to be suspended 1.

[0034] In the above example, a long brace was shown as the suspended object 1. However, the suspended object 1 is not limited to such long objects, and can also be an exterior wall panel, a large window, or the like. The horizontal positioning member 51 and the inclined positioning member 52 can also be H-shaped steel. In this case, for example, as shown in FIG. 9 , the horizontal positioning member 51 is positioned with the flange portion of the H-shaped steel facing up and down, and the flange portion is cut where it interferes with the inclined positioning member 52. The structure shown in FIG. 9 corresponds to a configuration example in which two first fixing position adjustment portions 51a are formed on the web portion of the H-shaped steel in the second embodiment. Furthermore, the ring portion 51b fixed to the horizontal positioning member 51 does not need to be fixed to the center position of the horizontal positioning member 51 in the width direction, but may be fixed to an end position in the width direction to tilt the horizontal positioning member 51.

[0035] 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]

[0036] 1: Hanging object 2: Core material 3:Restraint material 5: Lifting tool 6: Hanging rope 8: Hook 22: Joint 31: Box-shaped member 51: Horizontally placed member 51a: 1st fixed position adjustment part 51b :limbum 51c: Hole 51d: Pin 51e: Hinge-like member 52: Inclined placement member 52a: Second fixed position adjustment part 53: Fixing member 54: Hanging object connecting member 54a: Wire section 54b: Tightening device 55: Support rod

Claims

1. a horizontally disposed member that has a first fixing position adjustment portion at each of a left side portion and a right side portion, the first fixing position adjustment portion being capable of changing a fixing position in a lateral direction, and that is suspended horizontally by a suspension rope; a pair of inclined arrangement members each having the same length or different lengths, each having a second fixed position adjustment section whose fixed position and fixed angle are variable, and each being fixed at an arbitrary position and at an arbitrary angle on the first fixed position adjustment section; a fixing member that fixes each of the inclined arrangement members to the first fixing position adjustment portion via each of the second fixing position adjustment portions; a rotation prevention means for preventing rotation of each of the inclined arrangement members around the fixed member; a suspended object connecting member attached to each of the inclined arrangement members and connected to the suspended object.

2. 2. The lifting tool according to claim 1, wherein the rotation preventing means is the fixing member made of a high-strength bolt that generates a frictional force that prevents rotation of the inclined arrangement member.

3. 2. The lifting tool according to claim 1, wherein the rotation-preventing means comprises two first fixed position adjustment parts, one above the other, positioned parallel to each other at the left and right locations, and two fixing members attached to the two first fixed position adjustment parts via the second fixed position adjustment parts of each of the inclined positioning members.

4. 2. The lifting tool according to claim 1, wherein the rotation-preventing means comprises a contact member attached to the horizontal positioning member or each of the inclined positioning members, and the contact member attached to the horizontal positioning member comes into contact with each of the inclined positioning members, or the contact member attached to each of the inclined positioning members comes into contact with the horizontal positioning member, thereby preventing rotation of each of the inclined positioning members that would otherwise rotate due to the load of the object to be lifted.

5. 2. The lifting tool according to claim 1, wherein said rotation preventing means is a support rod positioned between said pair of inclined arrangement members to prevent said inclined arrangement members from approaching each other.

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