JP2021138528A - Suspending jig, lifting device, and lifting method - Google Patents

Abstract

To solve the problems of the prior art, that is, to provide a suspending jig that is able to easily grip a suspended load in comparison with the prior art, without requiring a work for securing a locking device having a hole and to provide a lifting device using the same and a lifting method.SOLUTION: A suspending jig according to the present invention includes a first wing body and a second wing body that are secured to a leading end of a wire rope of a hoisting device and hinged. Connecting portions for connecting the wire rope are provided at respective ends of the first wing body and the second wing body, and an insertion hole is provided in a part of a coupling part of the first and second wing bodies. When tension is applied to the wire rope connected to the respective connecting portions of the first wing body and the second wing body, a part of a suspended load inserted in the insertion hole is pinched between the first wing body and the second wing body, thereby gripping the suspended load.SELECTED DRAWING: Figure 1

Description

The present invention relates to a hanging jig for slinging a wire rope on a suspended load, and more specifically, the suspended load can be gripped by a pair of blades sandwiching a part of the suspended load. It is a technique related to a hanging jig, an elevating device using the hanging jig, and an elevating method.

Generally, when lifting a suspended load with a crane, a hook attached to the tip of a wire rope is used. Specifically, the hook is hung directly on a part of the suspended load, or the hook and a part of the suspended load are connected via a shackle to perform slinging and the suspended load is lifted. At this time, regardless of whether the hook is hung or the shackle is hung, the small hole or key shape provided in the suspended load is used.

It takes more time to sling the hook on a suspended load that is not provided with an appropriate small hole or the like. For example, a perforated locking tool such as an eyebolt may be attached to a suspended load, and the locking tool may be used to hook a hook.

However, when lifting a planar suspended load having a relatively large surface area, such as a steel deck (deck plate) of a bridge or a field of a stadium, it is extremely difficult to perform slinging work. Even if slinging is performed on a planar suspended load, it tends to be unstable when it is lifted, and it is not realistic to perform normal slinging work on a suspended load having a large surface area in the first place. In addition, attaching a perforated locking tool to a suspended load such as a deck plate requires procuring an extra material (perforated locking tool) that is not necessary for the original purpose, and also a perforated locking tool. There is a problem that work such as installation and removal is required, which increases work time and cost.

Therefore, Patent Document 1 proposes a technique of using a lifting device provided with a lifting jig when transporting a deck plate to a floor construction floor.

Japanese Unexamined Patent Publication No. 2018-044372

The technique disclosed in Patent Document 1 is preferable in that a deck plate (deck unit) having a relatively large surface area can be lifted without newly attaching a perforated locking tool. However, for this technology, it is necessary to prepare a "lifting jig" that has a two-layer structure consisting of a "lifting jig" made of end plate material and a "traverser" mainly made of hanging frame material. In addition to the high cost of maintenance and maintenance, there is a problem that the slinging work of hanging the lifting jig on the floor slab unit requires complicated labor. Further, the technique of Patent Document 1 can be used only for a deck plate provided with a "reinforcing bar truss" composed of upper end bars, lower end bars and lattice bars provided between them, that is, there is a problem that versatility is low. Can also be pointed out.

The object of the present invention is to solve the problem of the prior art, that is, the suspension can grip the suspended load more easily than the prior art without attaching a new perforated locking tool. It is an object of the present invention to provide a jig, an elevating device using the jig, and an elevating method.

The present invention has been developed by paying attention to the fact that the suspended load is gripped by sandwiching a part of the suspended load between the first and second hinged blades. It is an invention made based on an unconventional idea.

The hanging jig of the present invention includes a first wing body and a second wing body that are attached to the tip of a wire rope of a hoisting device such as a winch and are hinged to each other. A connecting portion for connecting the wire rope is provided at each end of the first wing body and the second wing body, and a part of the connecting portion between the first wing body and the second wing body is provided. An insertion hole is provided. Then, when tension is applied to the wire ropes connected to the connecting portions of the first wing body and the second wing body, a part of the suspended load inserted through the insertion hole is transferred to the first wing body and the second wing body. The suspended load is grasped by sandwiching it between the wings of the.

The hanging jig of the present invention may have a grip material attached to the inner circumference of the insertion hole. In this case, a part of the suspended load is gripped by the grip material.

The lifting device of the present invention includes the hanging jig of the present invention and a hoisting device such as a winch. When the hoisting device applies tension to the wire ropes connected to the first wing body and the second wing body, respectively, a part of the suspended load inserted through the insertion hole becomes the first wing body and the second wing body. The suspended load is gripped by sandwiching it between the blades. Then, the suspended load gripped by the first wing body and the second wing body is raised and lowered by the hoisting device.

The elevating device of the present invention may further include an inserter that is inserted into the insertion hole. A lower stopper is provided at one end of the insert. In this case, the insertion body with the lower stopper facing downward is inserted into the through hole and the insertion hole provided in the suspended load, so that the insertion body protruding from the insertion hole is inserted into the first wing body and the second wing body. The hoisting device raises and lowers the suspended load while being gripped by the wing body and supported by the lower stopper.

The elevating device of the present invention may also be provided with an inserter provided with an upper stopper at the other end to prevent it from falling off. The size (outer diameter) of the upper stopper is larger than the inner diameter of the insertion hole when the wire rope is wound up and a part of the suspended load is sandwiched between the first blade and the second blade. Provided.

The lifting method of the present invention is a method of lifting a suspended load using the hanging jig of the present invention, and is a method including a first insertion step, a second insertion step, and a lifting step. Of these, in the first insertion step, the insertion body provided with the lower stopper at the lower end is inserted into the through hole provided in the suspended load, and in the second insertion step, the insertion body protruding from the suspended load is inserted into the insertion hole of the hanging jig. Insert into. Further, in the lifting step, the suspended load is lifted by hoisting the wire rope of the hoisting device connected to one end of each of the first wing body and the second wing body. In the lifting process, the wire rope is wound up so that the inserter inserted through the insertion hole is sandwiched between the first blade and the second blade, and the suspended load is supported by the lower stopper. In the state of being lifted, the suspended load is lifted.

The lifting method of the present invention may be a method further including a hanging step. In this hanging process, the wire rope of the hoisting device is unwound to hang the suspended load lifted in the lifting process. Then, in the hanging process, even after the suspended load is placed on the ground, the wire rope is unwound to open the first blade and the second blade, and as a result, the insert inserted into the insertion hole. The grip is released.
Further, in the lifting step, the suspended load is lifted by hoisting the wire rope of the hoisting device connected to one end of each of the first wing body and the second wing body. In the lifting process, the wire rope is wound up so that the inserter inserted through the insertion hole is sandwiched between the first blade and the second blade, and the suspended load is supported by the lower stopper. In the state of being lifted, the suspended load is lifted.

The hanging jig, elevating device, and elevating method of the present invention have the following effects.
(1) It is possible to sling a suspended load without requiring the work of attaching a perforated locking tool.
(2) Since the structure is as simple as sandwiching a part of the suspended load between the hinged first blade and the second blade, the suspension jig and lifting device of the present invention can be easily and inexpensively used. By using the hanging jig of the present invention, it is possible to reduce the labor and cost required for lifting and lowering the suspended load.
(3) If a convex object that can be sandwiched between the first wing body and the second wing body, or a through hole into which an insertion body can be inserted is provided, a deck plate of a bridge or a competition A planar suspended load having a relatively large surface area, such as a field of a field, can be easily lifted.

(A) is a side view schematically showing an elevating device of the present invention in which a wire rope branched from a pulley is connected to a first wing body and a second wing body, and (b) is a side view schematically showing a lifting device of the present invention, and (b) is attached to an intermediate connecting body 2 A side view schematically showing an elevating device of the present invention in which a wire rope of a book is connected to a first wing body and a second wing body. (A) is a side view schematically showing the hanging jig of the present invention, and (b) is a plan view schematically showing the hanging jig of the present invention. (A) is a side view schematically showing a situation in which the first wing body and the second wing body are closed and rotated, and (b) is a side view schematically showing a situation in which the first wing body and the second wing body are released and rotated. figure. (A) is a side view schematically showing an insert body, and (b) is a side view schematically showing an insert body inserted into a competition field. The flow chart which shows the main process at the time of lifting a suspended load among the lifting methods of the present invention. The step diagram which shows the main process at the time of lifting a suspended load among the lifting methods of the present invention. The flow chart which shows the main process at the time of suspending a suspended load among the lifting methods of the present invention. The step diagram which shows the main process at the time of suspending a suspended load among the lifting methods of the present invention.

An example of an embodiment of the hanging jig, the elevating device, and the elevating method of the present invention will be described with reference to the drawings. For the sake of convenience, the case where the suspended load is a steel deck or a field of a stadium (hereinafter, simply referred to as a "competition field") will be described, but of course, the present invention is not limited to the steel deck or the competition field, and various suspensions are made. It can be carried out for loads.

1. 1. Lifting device and hanging jig First, the lifting device and hanging jig of the present invention will be described. The lifting method of the present invention is a method of raising and lowering a suspended load by using the lifting device and the hanging jig of the present invention. Therefore, the lifting device and the hanging jig of the present invention will be described first, and then the lifting jig and the hanging jig of the present invention will be described. The ascending / descending method will be described.

(lift device)
FIG. 1 is a side view schematically showing the elevating device 400 of the present invention. As shown in this figure, the elevating device 400 of the present invention is configured to include the hoisting device 300 and the hanging jig 100 of the present invention, and can also be configured to include the insertion body 200. The hoisting device 300 includes a winding drum DR (drum), a power for rotating the winding cylinder DR (not shown), and a wire rope WR wound (or unwound) by the winding cylinder DR, and is manufactured as a dedicated product. It may be a thing, or a winch or a hoist on the market can be used. A hanging jig 100 for gripping a suspended load (competition field FD in FIG. 1) is attached to the tip (lower end) of the wire rope WR.

In the lifting device 400 of the present invention, the first blade body 110a and the second blade body 110b of the hanging jig 100 are connected to the wire rope WR, respectively, and when the winding cylinder DR winds up the wire rope WR, the lifting device 400 is suspended. Various configurations can be adopted as long as the tool 100 is lifted and the winding body DR unwinds the wire rope WR to suspend the hanging jig 100. For example, as shown in FIG. 1A, the wire rope WR2 of the winding drum DR and the pulley PL are connected, and the wire rope WR1 branched by using the pulley PL is connected to the first blade body 110a and the second blade body. It can be configured to be connected to 110b. Alternatively, as shown in FIG. 1 (b), the pulley PL is suspended by the wire rope WR2 of the winding drum DR (that is, it is a moving pulley), and the intermediate connector CN is attached to the wire rope WR3 fixed to the pulley PL. The two wire ropes WR1 attached to the connecting body CN may be connected to the first wing body 110a and the second wing body 110b. Alternatively, two winding body DRs are prepared, and the wire rope WR of one winding body DR is directly connected to the first blade body 110a, and the wire rope WR of the other winding body DR is directly connected to the second blade body 110b. The configuration can also be adopted.

(Hanging jig)
As shown in FIG. 2, the suspension jig 100 of the present invention has a first blade body (hereinafter, simply referred to as “first blade body 110a”) and a second blade body (hereinafter, simply “second blade body”). 110b ") is included. 2A and 2B are schematic views showing the hanging jig 100 of the present invention, where FIG. 2A is a side view and FIG. 2B is a plan view. The first wing body 110a and the second wing body 110b shown in this figure are each plate-shaped members, but the members are not limited to these and may have various shapes such as rod-shaped and box-shaped members. The first wing body 110a and the second wing body 110b are hinged so as to be rotatable around the joint JT (the part where the first wing body 110a and the second wing body 110b are joined), and the first wing body is also a first wing body. A connecting portion 120 (for example, a small hole through which the wire rope WR is inserted) for connecting the wire rope WR is provided at each end of the 110a and the second wing body 110b.

As shown in FIG. 3A, when the winding device 300 winds up the wire rope WR, tension is applied to the wire rope WR connected to the first blade body 110a and the second blade body 110b. As a result, in FIG. 3A, the first wing body 110a rotates clockwise and the second wing body 110b rotates counterclockwise, that is, the first wing body 110a and the second wing body 110b rotate so as to approach each other. (Hereinafter, for convenience, it is referred to as "closed rotation"). On the other hand, as shown in FIG. 3B, when the winding device 300 unwinds the wire rope WR, the tension applied to the wire rope WR connected to the first blade body 110a and the second blade body 110b is released. , The first blade body 110a and the second blade body 110b rotate so as to be separated from each other (hereinafter, referred to as "release rotation" for convenience).

A small hole (hereinafter referred to as "insertion hole 130") is provided in a part of the joint portion JT in which the first blade body 110a and the second blade body 110b are hinged to each other. Then, by grasping a part of the suspended load inserted through the insertion hole 130, the suspended load is lifted and lowered. More specifically, when the hoisting device 300 winds up the wire rope WR, the first wing body 110a and the second wing body 110b are closed and rotated, and a part of the suspended load inserted through the insertion hole 130 is referred to as the first wing body 110a. The suspended load is raised and lowered while the second wing body 110b is sandwiched and gripped (that is, sandwiched).

For example, in FIG. 3A, the steel deck SP to which the reinforcing bar DB for the gibber is fixed is used as a suspended load, and the winding device 300 winds up the wire rope WR with the reinforcing bar DB inserted through the insertion hole 130. Tension is applied to these wire ropes WR, and as a result, the first wing body 110a and the second wing body 110b are closed and rotated, and the reinforcing bar DB is sandwiched in the insertion hole 130. That is, since a part of the suspended load (in this case, the reinforcing bar DB) is directly sandwiched by the inner peripheral surface (inner peripheral wall) forming the insertion hole 130, as shown in FIGS. 2 and 3. The grip material 140 may be attached to the inner circumference of the insertion hole 130. By sandwiching a part of the suspended load with the grip material 140 made of synthetic resin (for example, synthetic rubber) or the like, the suspended load can be raised and lowered in a more stable state, which is preferable.

On the other hand, in FIG. 3B, the winding device 300 unwinds the wire rope WR while sandwiching the reinforcing bar DB, so that the steel deck SP touches the ground, for example, and the tension of these wire rope WRs is released. As a result, the first wing body 110a and the second wing body 110b are released and rotated, and the reinforcing bar DB is released from being pinched by the first wing body 110a and the second wing body 110b.

By the way, in FIG. 3, the reinforcing bar DB (a part of the suspended load) is sandwiched between the first blade body 110a and the second blade body 110b, and then the steel deck SP (suspended load) is moved up and down. In this way, when a convex portion or a rod-shaped portion is formed in a part of the suspended load, the convex portion or the like is inserted into the insertion hole 130, and the first blade body 110a and the second blade body 110b are convex. It is advisable to sandwich a shaped part or the like. On the other hand, a suspended load such as the competition field FD may not have a suitable convex portion or the like that is inserted into the insertion hole 130, that is, sandwiched between the first wing body 110a and the second wing body 110b.

The Japan Sports Agency provides financial support for the formulation of stadium and arena development plans through public-private partnerships, and develops multifunctional and complex facilities that can hold non-sports events at all times with an emphasis on "earning" perspectives. Is being promoted. Against this background, a stadium having a two-layer structure including a competition field FD (for example, a lawn field) and an event floor (for example, a concrete floor) has been proposed. When playing soccer or the like, the competition field FD is placed at the ground level, while when holding a concert or the like, the competition field FD is lifted to the height of the large roof to use the event floor. Therefore, it is expected that the demand for the technology for raising and lowering the competition field FD will increase in the future.

In the case of a suspended load such as a competition field FD in which a convex portion or the like is not formed, the insertion body 200 shown in FIG. 4A may be used. As shown in this figure, the insertion body 200 includes a rod-shaped or cylindrical main body 210 and a lower stopper 220, and may also include an upper stopper 230. The lower stopper 220 is provided at one end (lower end in the figure) of the main body 210, and the upper stopper 230 is provided at the other end (upper end in the figure) of the main body 210. Further, as shown in FIG. 4A, the lower stopper 220 and the upper stopper 230 are formed to have an outer diameter larger than the outer diameter of the main body 210.

The insertion body 200 is used by inserting it into a through hole TH provided in the suspended load. More specifically, as shown in FIG. 4B, the main body 210 of the insertion body 200 with the lower stopper 220 facing downward is inserted from below the through hole TH provided in the competition field FD, and the through hole TH is inserted. The main body 210 protruding from the main body 210 is further inserted into the insertion hole 130, and the main body 210 is sandwiched between the first blade body 110a and the second blade body 110b. That is, after forming the insertion body 200 (particularly the main body 210 protruding from the through hole TH) as a part of the competition field FD, the insertion body 200 is sandwiched and the competition field FD is moved up and down. At this time, the lifted competition field FD is supported by the lower stopper 220. Therefore, the lower stopper 220 has a dimension larger than the inner diameter of the through hole TH so that the competition field FD does not fall off from the insertion body 200. On the other hand, the upper stopper 230 is for preventing the insertion body 200 from coming off from the hanging jig 100. Therefore, the upper stopper 230 has a dimension (outer diameter) larger than the inner diameter of the insertion hole 130 in the closed and rotated state (that is, the state in which the main body 210 is sandwiched between the first blade 110a and the second blade 110b).

2. Lifting method Next, the lifting method of the present invention will be described with reference to the drawings. The lifting method of the present invention is a method of raising and lowering a suspended load by using the lifting device 400 and the hanging jig 100 described so far, and therefore, the description overlaps with the contents described in the lifting device 400 and the hanging jig 100. Will be avoided, and only the contents specific to the elevating method of the present invention will be described. That is, the contents not described here are the same as those described in "1. Lifting device and hanging jig".

(Hanging)
FIG. 5 is a flow chart showing a main process for lifting a suspended load among the lifting methods of the present invention, and FIG. 6 is a step diagram thereof. First, preparations for lifting work are made, such as connecting the first blade body 110a and the second blade body 110b to the tip (lower end) of the wire rope WR of the lifting device 400, and preparing the insertion body 200 (the insertion body 200 is prepared). Step 101) in FIG. Then, as shown in FIG. 6A, the main body 210 of the insertion body 200 with the lower stopper 220 facing downward is inserted from below the through hole TH provided in the competition field FD (Step 102 in FIG. 5). Further, as shown in FIG. 6B, the main body 210 protruding from the through hole TH is further inserted into the insertion hole 130 of the hanging jig 100 (Step 103 in FIG. 5).

When the main body 210 is inserted into the insertion hole 130, as shown in FIG. 6C, the elevating device 400 winds up the wire rope WR connected to the first blade body 110a and the second blade body 110b, and these wire rope WRs are wound up. The first wing body 110a and the second wing body 110b are closed and rotated by applying tension to the wing body 110a and the second wing body 110b, and the main body portion 210 is sandwiched between the first wing body 110a and the second wing body 110b (Step 104 in FIG. 5).

When the main body 210 of the insertion body 200 inserted into the through hole TH of the competition field FD is sandwiched, as shown in FIG. 6D, the wire rope WR is further wound up by the elevating device 400 and suspended through the insertion body 200. The competition field FD attached to the jig 100 is lifted (Step 105 in FIG. 5). At this time, as can be seen from FIG. 6D, the main body 210 of the insertion body 200 is sandwiched between the first wing body 110a and the second wing body 110b, and the competition field FD is held from below by the lower stopper 220. It is supported, and the upper stopper 230 prevents the insertion body 200 from falling out of the hanging jig 100.

(Hanging)
FIG. 7 is a flow chart showing a main process for suspending a suspended load among the lifting methods of the present invention, and FIG. 8 is a step diagram thereof. First, as shown in FIG. 8A, the wire rope WR is unwound by the elevating device 400, and the competition field FD attached to the hanging jig 100 is hung via the insertion body 200 (Step 201 in FIG. 7). .. Then, as shown in FIG. 8B, the competition field FD is further suspended to the ground and placed on the support board (Step 202 in FIG. 7). Further, after that, the wire rope WR is unwound by the lifting device 400, the hanging jig 100 is placed on the upper surface of the competition field FD, and the tension of the wire rope WR is released as shown in FIG. The blade body 110a and the second blade body 110b are released and rotated to release the pinching of the main body portion 210 between the first blade body 110a and the second blade body 110b (Step 203 in FIG. 5).

When the main body 210 is released from being pinched by the first blade 110a and the second blade 110b, as shown in FIG. 8D, the insertion body 200 is pulled out from the hanging jig 100 and the through hole TH, and the lifting device The wire rope WR is wound up at 400 to lift the hanging jig 100 (Step 204 in FIG. 5).

The hanging jig, lifting device, and lifting method of the present invention can be used for various hanging loads, and are particularly effective for surface-shaped hanging loads having a relatively large surface area such as a deck plate of a bridge or a field of a stadium. It can be used.

100 Suspension jig 110a (of suspension jig) 1st wing body 110b (of suspension jig) 2nd wing body 120 (of suspension jig) Connection part 130 (of suspension jig) Insertion hole 140 (hanging) Grip material (of jig) 200 (elevating device) Insert 210 (insert) Main body 220 (insert) Lower stopper 230 (insert) Upper stopper 300 (elevating device) Winding device 400 Elevating device CN intermediate connecting body DB Reinforcing bar DR winding body FD competition field JT joint PL pulley SP steel floor slab WR wire rope

Claims (7)

A hanging jig attached to the tip of the wire rope of the hoisting device.
With a first wing and a second wing,
The first wing body and the second wing body are hinged to each other.
A connecting portion for connecting the wire rope is provided at each end of the first blade body and the second blade body.
An insertion hole is provided in a part of the joint portion between the first blade body and the second blade body.
When tension is applied to the wire rope connected to the connecting portion between the first blade body and the second blade body, a part of the suspended load inserted through the insertion hole becomes the first blade body. It is gripped by sandwiching it with the second wing body.
A hanging jig characterized by this. A grip material is attached to the inner circumference of the insertion hole,
A part of the suspended load is gripped by the grip material.
The hanging jig according to claim 1. Winding device and
A hanging jig having a first wing body and a second wing body is provided.
The first blade and the second blade are hinged to each other, and an insertion hole is provided in a part of the joint between the first blade and the second blade.
A wire rope of the hoisting device is connected to each end of the first wing body and the second wing body.
When the hoisting device applies tension to the wire rope, a part of the suspended load inserted through the insertion hole is gripped by being sandwiched between the first blade body and the second blade body.
The suspended load gripped by the first wing body and the second wing body is lifted and lowered by the hoisting device.
An elevating device characterized by that. An inserter for inserting into the insertion hole is further provided.
A lower stopper is provided at one end of the insert.
By inserting the insertion body with the lower stopper facing downward into the through hole provided in the suspended load and the insertion hole, the insertion body protruding from the insertion hole is inserted into the first wing. It is gripped by the body and the second wing, and the suspended load is supported by the lower stopper.
3. The elevating device according to claim 3. An upper stopper for preventing falling off is provided at the other end of the insertion body.
The size of the upper stopper is larger than the inner diameter of the insertion hole when the wire rope is wound up and a part of the suspended load is sandwiched between the first blade body and the second blade body.
4. The lifting device according to claim 4. A hanging jig having a first blade and a second blade hinged to each other and having an insertion hole in a part of the joint between the first blade and the second blade. Use,
The first insertion step of inserting the insertion body provided with the lower stopper at the lower end into the through hole provided in the suspended load, and
A second insertion step of inserting the insertion body protruding from the suspended load into the insertion hole of the hanging jig.
A lifting step of lifting the suspended load by winding a wire rope of a winding device connected to one end of each of the first blade and the second blade is provided.
In the lifting step, the wire rope is wound up so that the insertion body inserted into the insertion hole is sandwiched between the first blade body and the second blade body, and the lower stopper is gripped. Lifting the suspended load while the suspended load is supported by the
A method of raising and lowering that is characterized by that. By unwinding the wire rope of the hoisting device, a hanging step of hanging the suspended load lifted in the lifting step is further provided.
In the hanging step, the wire rope was unwound even after the suspended load was placed on the ground, so that the first blade and the second blade were opened and inserted into the insertion hole. The grip of the insert is released.
The elevating method according to claim 6, wherein the method is characterized by the above.

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