JP2024072544A - Lifting jig, lifting jig, and method for lifting a hanging folding plate - Google Patents

Abstract

[Problem] To provide a lifting jig, a lifting jig, and a method for lifting a suspended folded plate that can load and unload a long construction member with a simple configuration while improving the workability and safety of loading and unloading the construction member. [Solution] The lifting jig 3 is used for placing a suspended folded plate P and lowering the suspended folded plate P at a predetermined height. The lifting jig 3 includes a plurality of main body members 30 provided at predetermined intervals, and a connecting member 40 that connects the plurality of main body members 30. The main body member 30 has a connecting portion 31 that extends in a direction intersecting the length direction of the connecting member 40, an extension portion 32 that extends downward from one end of the connecting portion 31, and a mounting portion 33 on which the suspended folded plate P is placed. An open portion 34 for loading and unloading the suspended folded plate P from the side is formed on the other end side of the body member 30 in the extending direction of the connecting portion 31, and the length of the connecting portion 31 in the extending direction is formed shorter than the length of the placement portion 33 in the extending direction. [Selected Figure]

Description

The present invention relates to a lifting jig, a lifting tool, and a method for lifting a hanging folded plate, and to a lifting jig, a lifting tool, and a method for lifting a hanging folded plate that are connected to a lifting device and used when lifting long construction members.

Conventionally, a lifting tool has been proposed for lifting a long roof component with a crane and lowering the roof component near the construction position on the roof of a building (see, for example, Patent Documents 1 and 2).

The lifting jig described in Patent Document 1 grasps both ends of the roof plate in the width direction by closing the engagement members (tong members) near the ground. In this state, the lifting jig is hoisted by a crane, and the roof plate is lowered by opening the engagement members near the installation position.

The lifting jig described in Patent Document 2 uses multiple engaging members (hooks and U-shaped members) to hook onto both ends of the roof member in the width direction, allowing the crane to lift the roof member. When the roof member is to be lowered near the installation position, a worker removes the engaging members from the roof member and lowers it.

Japanese Patent Application Laid-Open No. 6-092583 Japanese Patent Application Laid-Open No. 8-074394

In installing the roof member, a worker lifts the roof member from near the ground to the height of the aerial work vehicle using a lifting jig. Then, a worker on the aerial work vehicle lowers the roof member from the lifting jig and attaches the roof member to the installation position.
Therefore, workers had to carry out the unloading and installation of the roof components on a narrow aerial work vehicle.

However, in the lifting tool as described in Patent Document 1, when the roof folding plate is lowered near the installation position, the engagement member is opened to release the engagement, and the roof folding plate is sucked and held while the unloading work is performed. Therefore, there is a risk of reducing the work efficiency on the high-altitude work vehicle.
In addition, since a compressor is required as an air source to open and close the engaging members and to suck and hold the roof folding plate, there is a risk that the lifting jig will become large.

In addition, with a lifting jig like that in Patent Document 2, in order to remove the engaging member from the roof member, it is necessary to temporarily place the roof member on the handrail of the aerial work vehicle. This could reduce work efficiency. In addition, if the roof member is temporarily placed on the handrail, there is a risk that the roof member will fall from the handrail, which could affect safety.

In addition, if roof components were to be installed by setting up scaffolding rather than using an aerial work vehicle, there was a risk that costs would increase and the number of work steps would also increase.

The present invention was made in consideration of the above problems, and the object of the present invention is to provide a lifting tool, a lifting jig, and a method for lifting a hanging folded plate that can load and unload long construction members with a simple configuration while improving the workability and safety of loading and unloading the construction members.

The above problem is solved by the lifting jig of the present invention, which is used when lifting a long construction member by connecting it to a lifting device, and is used for placing the construction member and lowering the construction member at a predetermined height, and is provided with a plurality of main body members arranged at a predetermined interval in the longitudinal direction of the construction member, and a connecting member that extends along the longitudinal direction of the construction member and connects the plurality of main body members, and the main body member has a connecting portion that is connected to the lifting device and extends in a direction intersecting the longitudinal direction of the connecting member, an extending portion that extends downward from one end of the extending direction of the connecting portion, and a placing portion that extends from a lower part of the extending portion toward the connecting portion in the extending direction of the connecting portion and places the construction member on it, and an opening portion is formed on the other end side of the extending direction of the connecting portion of the main body member for loading and unloading the construction member from the side, and the length of the extending direction of the connecting portion is formed shorter than the length of the extending direction of the placing portion.

With the above-mentioned configuration, the length of the connecting portion is shorter than the length of the placement portion, so that a sufficient open space can be secured when placing or lowering the construction member. In other words, the construction member can be easily placed from diagonally above through the open portion, and even when lifted, the construction member can be easily lowered from diagonally above through the open portion, so that the work time can be shortened.
In more detail, when a worker on the vehicle for high-altitude work unloads a lifted construction member, the worker can easily lower the construction member from diagonally above through the opening. Therefore, there is no need to release an engaging member such as a hook, and the unloading work can be performed without temporarily placing the construction member even on a narrow vehicle for high-altitude work. Then, the work of attaching the construction member to the construction position can be performed while maintaining the unloaded state.
Therefore, the construction members can be loaded and unloaded with a simple configuration while improving the workability and safety of loading and unloading long construction members.

In this case, it is preferable that the placement portion has a stopper that protrudes upward from an end portion of the placement portion on the side of the open portion in an extending direction.
With the above-mentioned configuration, by providing a stopper on the mounting portion, it is possible to prevent the construction member from falling off the mounting portion when it is lifted.

In this case, it is preferable that the connection member is attached to a tip portion of the placement portion on the side of the open portion in an extending direction of the placement portion.
With the above configuration, the connecting member is provided closer to the worker than the mounting portion, so that it is possible to prevent the mounting portion from colliding with the worker when the worker receives the construction member.

In this case, the placement portion has an attachment portion to which the connecting member is detachably attached, and the lower end of the connecting member is preferably positioned at the same height as the lower end of the placement portion or higher than the lower end of the placement portion.
With the above configuration, the connecting member is removably attached to the mounting portion so that it does not protrude downward from the mounting portion. Therefore, when assembling the hanging jig, the connecting member can be attached while the main body member is placed on the ground, making it easy to assemble the hanging jig.

In addition, the above problem is solved by the lifting jig of the present invention, which is a lifting jig for a suspended folded plate, comprising a lifting jig and a balance jig arranged between the lifting device and the lifting jig in the vertical direction.
With the above configuration, the workability and safety of loading and unloading the suspended folding plate can be improved while the construction members can be loaded and unloaded with a simple configuration.
In detail, since the suspended folded plate is a long and wide roof component, it is necessary to ensure sufficient open space when placing or lowering the suspended folded plate from the lifting jig.
Therefore, by forming the length of the connecting portion shorter than the length of the mounting portion, sufficient open space is secured and the construction materials can be easily loaded and unloaded from diagonally above through the open portion, thereby improving work efficiency.

In addition, according to the method for lifting a suspended folding plate of the present invention, the problem is solved by a method for lifting a suspended folding plate using a lifting jig, the method including a loading step of loading the suspended folding plate on the loading section, a lifting step of lifting the suspended folding plate using the lifting device, and an unloading step of unloading the lifted suspended folding plate from the loading section, in which in the loading step, the suspended folding plate is loaded on the loading section so that the cushioning material provided on the underside of the suspended folding plate is on the upper side, and in the unloading step, the suspended folding plate loaded on the loading section is rotated to unload the suspended folding plate from the loading section so that the cushioning material is on the lower side.
With the above configuration, the hanging folding plate is placed or lowered from the opening while rotating, so that the hanging folding plate can be placed on the placement part with the lower surface on which the cushioning material is provided facing up. Therefore, the cushioning material can be protected from the impact when the hanging folding plate is placed on the placement part.

At this time, the method includes an installation step of attaching the hanging folding plate lowered from the placement portion to the installation position, and in the installation step, the hanging folding plate with the cushioning material positioned on the lower side is lifted up to the installation position and attached so as to be suspended from the underside of the installation position.
With the above-mentioned configuration, even on a narrow aerial work platform, the workpieces placed on the placement section can be unloaded without being temporarily placed on the placement section. Also, the workpieces can be attached to the underside of the work position while maintaining the unloaded state.

The lifting jig, lifting jig, and method for lifting a suspended folding plate of the present invention improve the workability and safety of loading and unloading long construction members, while allowing the construction members to be loaded and unloaded with a simple configuration.

FIG. 2 is a front view of the lifting jig, showing a state in which a hanging folding plate is placed on the lifting jig and lifted up. FIG. FIG. FIG. FIG. FIG. FIG. FIG. 1 is a diagram showing a method for lifting a suspended folded plate.

Hereinafter, a lifting jig 1 according to one embodiment of the present invention (hereinafter, this embodiment) will be described with reference to Figures 1 to 8. In the following description, as shown by the arrows in Figure 1, the "vertical direction" refers to the vertical direction when lifting the suspended folded plate P. The "lateral direction" refers to the longitudinal direction of the suspended folded plate P placed on the lifting jig 1. In addition, the "front-rear direction" refers to the width direction of the suspended folded plate P placed on the lifting jig 1.
The "front-rear direction" is a direction perpendicular to the "up-down direction" and the "left-right direction".

<Lifting jig>
As shown in FIG. 1, the lifting jig 1 is connected to a crane C (lifting device) and is used to lift a long construction member (suspended folded plate P).
In detail, the lifting jig 1 lifts the suspended folded plate P used for the roof of the building with the crane C, and moves the suspended folded plate P to the vicinity of the construction position of the roof of the building. Then, the lifted suspended folded plate P is unloaded from the lifting jig 1 by a worker on the high-altitude work vehicle.

The suspended folded plate P is a construction member used as a roof of a building. The suspended folded plate P is attached to a steel beam of the building so as to be suspended by a hanging bracket.
The suspended folded plate P is a roofing material formed by bending a copper plate so that peaks and valleys are alternately repeated. A cushioning material P1 is formed on the surface that becomes the lower side when the suspended folded plate P is suspended from a steel beam.
The buffer material P1 is, for example, a sponge-like insulating material with cushioning properties and a thickness of about 4 mm, and is provided to reduce condensation.

As shown in FIG. 1, the lifting jig 1 is connected to a crane C via a crane wire C1.
The crane C is a lifting device having a wire, sling, chain, or the like extending downward. The crane wire C1 is connected to a wire, or the like extending from the crane C, and is hooked onto the balance jig 2. For example, a hook having a hook mechanism is attached to the lower end of the crane wire C1. Note that this is not limited to a hook, and a shackle, or the like, may also be used.

1, the lifting jig 1 is mainly composed of a balance jig 2 and a lifting jig 3. The lifting jig 1 is lifted by a crane C with a suspended folded plate P placed on the lifting jig 3.
Specifically, the worker places the suspended folded plate P on the lifting jig 3, and lifts the lifting jig 3 via the balance jig 2 by the crane C. Then, the worker lowers the suspended folded plate P from the lifting jig 3 when the lifting jig 1 is at a predetermined height position (the working position of the aerial work platform arranged near the construction position).

<Balance jig>
1, the balance jig 2 is disposed between the crane C and the hanging jig 3 in the vertical direction. The balance jig 2 is a member that holds the hanging position of the hanging jig 3, and includes a balance member 10 formed of an H-shaped steel that is long in the left-right direction.

As shown in Figures 1 to 3, the balance member 10 has a first balance section 11 and a second balance section 12 made of H-shaped steel that are long in the left-right direction, a joint section 13 that connects the first balance section 11 and the second balance section 12, and a connecting wire section 14 for connecting to the hanging jig 3.

The first balance portion 11 is an H-shaped steel elongated in the left-right direction and has upper and lower flanges. The upper flange is formed with first locking pieces 11a, 11b, 11c, and 11d. The lower flange is formed with first engagement pieces 11e, 11f, 11g, and 11h.
A hook provided at the lower end of the crane wire C1 is engaged with any one of the first locking pieces 11a to 11d, thereby connecting the crane C to the balance jig 2. Furthermore, an upper hook 14a provided at the upper end of the connecting wire portion 14 is engaged with any one of the first engagement pieces 11e to 11h, thereby connecting the balance jig 2 to the hanging jig 3.

The second balance portion 12 is an H-shaped steel that is long in the left-right direction and has upper and lower flanges. The upper flange is formed with second locking pieces 12a and 12b. The lower flange is formed with second engagement pieces 12c, 12d, and 12e.
A hook provided at the lower end of the crane wire C1 is engaged with either of the second locking pieces 12a, 12b, thereby connecting the crane C and the balance jig 2. Furthermore, an upper hook 14a provided at the upper end of the connecting wire portion 14 is engaged with either of the second engagement pieces 12c to 12e, thereby connecting the balance jig 2 and the lifting jig 3.

3, first locking pieces 11b, 11c and second locking pieces 12a, 12b are provided symmetrically around the first locking piece 11d on the upper sides of the first balance section 11 and the second balance section 12. Also, first engagement pieces 11e to 11g and second engagement pieces 12c to 12e are provided symmetrically around the first engagement piece 11h on the lower sides of the first balance section 11 and the second balance section 12.
Therefore, when lifting the suspended folded plate P, the lifting jig 3 can be lifted in a well-balanced manner by using the connected first balance portion 11 and second balance portion 12.

3, the first balance portion 11 is formed to be longer than the second balance portion 12. Specifically, the first balance portion 11 has a length of 3195 mm, and the second balance portion 12 has a length of 2795 mm, and they are connected by a joint portion 13 with a gap of 10 mm therebetween.
The overall length of the balance member 10 in the longitudinal direction is 6000 mm, and the first locking piece 11d and the first engaging piece 11h are provided at a position 3000 mm from the end in the longitudinal direction. The first locking pieces 11b, 11c, 11d and the second locking pieces 12a, 12b are provided at equal intervals (1125 mm). Similarly, the first engaging pieces 11f, 11g, 11h and the second engaging pieces 12c, 12d are provided at equal intervals (1125 mm).
In this way, the balance member 10 is provided with a plurality of first locking pieces 11a to 11d, first engagement pieces 11e to 11h, second locking pieces 12a, 12b, and second engagement pieces 12c to 12e. Therefore, it can also be used when the suspension position is to be offset depending on the situation at the site (for example, to avoid interference with walkways or equipment racks).

2 and 3, the joint portion 13 connects the respective ends in the left-right direction (length direction) of the first balance portion 11 and the second balance portion 12. The joint portion 13 has a flange plate 13a provided on the flange portion and a web plate 13b provided on the web portion.
The flange plate 13a and the web plate 13b are fixed with bolts to the first balance portion 11 and the second balance portion 12, respectively. Therefore, the first balance portion 11 and the second balance portion 12 are detachably connected by attaching the flange plate 13a and the web plate 13b with bolts.

As shown in FIG. 1, the connecting wire portion 14 is a wire, sling, chain, or the like that extends in the vertical direction and has an upper hook 14a provided at an upper end and a lower hook 14b provided at a lower end.
The upper hook 14a is engaged with either the first engagement pieces 11e to 11h or the second engagement pieces 12c to 12e. The lower hook 14b is connected to the upper end of the hanging jig 3, whereby the balance jig 2 and the hanging jig 3 are connected to each other.

In this embodiment, as shown in Figures 1 and 2, the left-side crane wire C1 is engaged with the first locking piece 11b, and the right-side crane wire C1 is engaged with the second locking piece 12b, thereby connecting the balance jig 2 to the crane C so that it is horizontal.
In addition, the left connecting wire portion 14 is engaged with the first engaging piece 11e and the right connecting wire portion 14 is engaged with the second engaging piece 12e, so that the hanging jig 3 is connected to the balance jig 2 so as to be horizontal.

In addition, since the first balance portion 11 and the second balance portion 12 of the balance member 10 are detachably connected by the joint portion 13, when the suspended folded plate P is short (for example, a suspended folded plate P of about 3500 to 6000 mm), only the first balance portion 11 can be used.
Specifically, when only the first balance section 11 is used, the left crane wire C1 is engaged with the first locking piece 11a, and the right crane wire C1 is engaged with the first locking piece 11d, thereby connecting the balance jig 2 to the crane C so that the balance jig 2 is horizontal. Furthermore, the left connecting wire section 14 is engaged with the first engaging piece 11e, and the right connecting wire section 14 is engaged with the first engaging piece 11h, thereby connecting the hoisting jig 3 to the balance jig 2 so that the balance jig 3 is horizontal.

First locking pieces 11a to 11d are provided symmetrically in the longitudinal direction on the upper side of the first balance portion 11. First engaging pieces 11e to 11h are provided symmetrically in the longitudinal direction on the lower side of the first balance portion 11.
Therefore, when lifting a short suspended folded plate P, the lifting jig 3 can be lifted in a well-balanced manner by using only the first balance portion 11.

In this way, depending on the length of the suspended folding plate P to be lifted, the worker can choose whether to use the first balance section 11 and the second balance section 12 connected together or to use only the first balance section 11, thereby making it possible to lift suspended folding plates P of various lengths in a balanced manner.
The balance member 10 to be used is not limited to this, and only the second balance portion 12 may be used. Also, a plurality of first balance portions 11 may be connected and used. The length of the balance member 10 in the left-right direction can be appropriately adjusted according to the length of the hanging folded plate P to be lifted.

<Hanging jig>
1, the lifting jig 3 is connected to a crane C via a balance jig 2 and is used to lift a suspended folded plate P that is long in the left-right direction. The lifting jig 3 includes a wire member 20 that is connected to the balance jig 2, a plurality of main body members 30 that are connected to the wire member 20, and a connection member 40 that connects the plurality of main body members 30.
The main body members 30 are provided at predetermined intervals in the longitudinal direction (left-right direction) of the suspended folded plate P to be placed. The connection members 40 extend along the left-right direction and connect the main body members 30 at predetermined intervals.

As shown in Figures 4 to 7, the wire member 20 is a wire, sling, chain, etc. that extends in the vertical direction, and has a first wire portion 21 and a second wire portion 22 that is longer than the first wire portion 21.
The first wire portion 21 has a first hook 21a for coupling to a front upper end portion of the main body member 30. The second wire portion 22 has a second hook 22a for coupling to a rear upper end portion of the main body member 30.

As shown in FIG. 1 , the first wire portion 21 and the second wire portion 22 are provided on the left and right sides, respectively, and connect the connecting wire portion 14 and the main body member 30 so that the lifting jig 3 is horizontal when lifted.
Specifically, the lower hook 14b of the balance member 10 is connected to the upper ends of the first wire portion 21 and the second wire portion 22. The first hook 21a and the second hook 22a are connected to the upper end of the main body member 30, respectively.
In this manner, the balance member 10 and the main body member 30 are connected by the left and right wire members 20 .

As shown in Figures 4 to 7, the main body member 30 is a jig for placing and lifting the suspended folded plate P. Three main body members 30 are provided at predetermined intervals in the left-right direction. The suspended folded plate P is placed across the three main body members 30.
The main body member 30 is a square steel pipe formed in an approximately U-shape when viewed from the side, and has a connecting portion 31 that is connected to the crane C via a balance jig 2, an extension portion 32 that extends downward from the connecting portion 31, a mounting portion 33 that extends horizontally from the extension portion 32, and an open portion 34 formed on the opposite side of the extension portion 32.

4 to 7, the coupling portion 31 extends in a direction intersecting with the length direction of the connection member 40. Specifically, the coupling portion 31 extends in a front-rear direction perpendicular to the left-right direction and the up-down direction.
The connecting portion 31 has an upper clamp 31a provided in the center in the extending direction, a front locking piece 31b provided at the front end, and a rear locking piece 31c provided at the rear end.

The upper clamp 31a is an attachment portion for detachably attaching the connection member 40. By attaching the connection member 40 to each of the upper clamps 31a of the plurality of body members 30, the body members 30 are maintained at a predetermined interval.
The front locking piece 31b is a hanging piece for attaching the first hook 21a of the first wire portion 21. The first hook 21a is attached to any of the front locking pieces 31b of the plurality of main body members 30, whereby the balance jig 2 and the hanging jig 3 are connected to each other.
The rear locking piece 31c is a hanging piece for attaching the second hook 22a of the second wire portion 22. The second hook 22a is attached to any one of the rear locking pieces 31c among the plurality of main body members 30, whereby the balance jig 2 and the hanging jig 3 are connected to each other.

As shown in Figures 4 to 7, the extension portion 32 extends downward from one end of the connecting portion 31 in the extension direction. Specifically, it extends downward from the rear end of the connecting portion 31 and connects to the rear end of the mounting portion 33. The extension portion 32 is provided so as to straddle the connecting portion 31 and the extension portion 32, and has a reinforcing rib 32a for reinforcing the main body member 30.

As shown in Figures 4 to 7, the placement portion 33 is for placing the suspended folded plate P, and extends from a lower portion of the extension portion 32 toward the connecting portion 31 in the extending direction of the connecting portion 31.
Specifically, it extends from the lower end of the extending portion 32 in the extending direction of the connecting portion 31. In other words, the connecting portion 31 and the mounting portion 33 extend forward in parallel from the upper and lower ends of the extending portion 32, respectively.

As shown in Figures 4 to 7, the mounting portion 33 has a front clamp 33a provided at the front end portion in the extension direction, a rear clamp 33b provided at the rear end portion in the extension direction, and a stopper 33c protruding upward from the end portion (front end portion) on the open portion side of the mounting portion 33.
The front clamp 33a and the rear clamp 33b are mounting portions for removably mounting the connection member 40.
The stopper 33c is a fall prevention material that prevents the suspended folded plate P from falling from the mounting portion 33 when the suspended folded plate P is placed on the mounting portion 33 and lifted up.

As shown in Figures 4 to 7, the open portion 34 is formed on the other end side (front end side) of the main body member 30 in the extension direction of the connecting portion 31, and is a space for loading and unloading the suspended folded plate P from the side (front).
The suspended folding plate P can be easily loaded from the front through the opening 34, and in the lifted state, the suspended folding plate P can be easily lowered from the front through the opening 34. Therefore, the operation of releasing an engaging member such as a hook is not required, and the suspended folding plate P can be easily loaded and unloaded.

7, the length of the connecting portion 31 is formed shorter than the length of the mounting portion 33. Therefore, the opening portion 34 is formed wide in the main body member 30, so that when the hanging folded plate P is loaded and unloaded, the hanging folded plate P is prevented from interfering with the connecting portion 31, and the work efficiency can be improved.
In this way, by forming the opening 34 shorter than the length of the placement portion 33, the hanging folded plate P can be easily loaded and unloaded from diagonally above. Furthermore, since the opening 34 is formed wide, the hanging folded plate P can be loaded and unloaded while rotating the hanging folded plate P around the axis of the long dimension of the hanging folded plate P.

4 to 7, the connection member 40 is a member for connecting a plurality of main body members 30 at a predetermined interval. The connection member 40 is attached across three main body members 30, and fixes the main body members 30 so as to maintain the predetermined interval.
The connecting member 40 is a single-tube pipe extending along the longitudinal direction of the suspended folded plate P, and has a first connecting portion 41 attached to the connecting portion 31, a second connecting portion 42 attached to the front end of the supporting portion 33, and a third connecting portion 43 attached to the rear end of the supporting portion 33.

The first connection portion 41 is detachably attached to each of the upper clamps 31a of the multiple main body members 30. The second connection portion 42 is detachably attached to each of the front clamps 33a of the multiple main body members 30. The third connection portion 43 is detachably attached to each of the rear clamps 33b of the multiple main body members 30.
The connecting member 40 is removably attached by a clamp, so that the connecting member 40 can be easily attached to the main body member 30.

The second connection portion 42 is attached to a tip portion (front end portion) on the open portion 34 side in the extension direction of the mounting portion 33. That is, the second connection portion 42 is provided closer to the operator (front end side) than the mounting portion 33.
When a worker receives the suspended folding plate P on the aerial work vehicle, the second connection portion 42 abuts against the handrail of the aerial work vehicle, thereby preventing the mounting portion 33 from colliding with the worker.
Therefore, safety can be improved when a worker receives the suspended folding plate P on a high-altitude work vehicle.

The second connecting portion 42 and the third connecting portion 43 are detachably attached to the front clamp 33a and the rear clamp 33b. As shown in FIG. 7 , the lower ends of the second connecting portion 42 and the third connecting portion 43 are disposed above the lower end of the mounting portion 33.
Therefore, when multiple main body members 30 are lined up to assemble the hanging jig 3, the lower end of the connecting member 40 is positioned higher than the lower end of the mounting portion 33, so that the connecting member 40 can be easily attached with the mounting portion 33 placed on the ground.
Therefore, when assembling the hanging jig 3 at the construction site, there is no need to lift up the main body member 30, and the assembly work of the hanging jig 3 can be carried out efficiently.

In this manner, the plurality of main body members 30 are fixed to maintain a predetermined interval by the plurality of connecting members 40. Therefore, the rigidity of the hanging jig 3 can be increased, and when the hanging folded plate P is placed on the placement portion 33, the hanging jig 3 can be lifted in a stable state.
In this embodiment, the connection members 40 are attached to the center of the upper side of the main body member 30 and to both front and rear ends of the lower side, thereby increasing the overall rigidity of the hanging jig 3. However, the number of the connection members 40 and the attachment positions are not limited to this. For example, the connection members 40 may be attached to the extension portion 32. It is preferable that the connection members 40 are attached to a position that does not block the opening portion 34 so that the hanging folded plate P can be easily loaded and unloaded from the front through the opening portion 34.

The multiple main body members 30 are fixed to each other at a predetermined interval by a removable connecting member 40. Therefore, the worker can adjust the number of main body members 30 to be used depending on the length of the hanging folding plate P to be lifted, so that hanging folding plates P of various lengths can be placed.

<How to lift the hanging folded plate>
Next, a method for lifting the suspended folded plate P using the lifting jig 1 will be described with reference to FIGS.
As shown in Fig. 8, the method includes at least a "loading step (S1)" of loading the suspended folded plate P on the loading section 33, a "lifting step (S2)" of lifting the suspended folded plate P using a crane C, an "unloading step (S3)" of lowering the lifted suspended folded plate P from the loading section 33, and an "attaching step (S4)" of attaching the suspended folded plate P lowered from the loading section 33 to the construction position. The steps will be described in detail below.
In addition, explanations of other steps in the lifting operation of the suspended folded plate P will be omitted.

In the "loading process (S1)", the worker loads the suspended folded plate P onto the loading section 33 so that the cushioning material P1 provided on the underside of the suspended folded plate P is on the upper side.

In the "lifting process (S2)", a worker operates the crane C and lifts the suspended folded plate P using the lifting jig 1. The worker lifts the lifting jig 1 installed on the ground with the crane C in a state in which the suspended folded plate P is placed on the lifting jig 3. Then, the worker moves the lifting jig 3 to the vicinity of the construction position on the roof of the building.
Since the stopper 33c is provided on the placement portion 33, the hanging folded plate P can be prevented from falling when the hanging jig 3 swings in the forward and backward directions. In order to prevent the hanging jig 3 from swinging, the lifting jig 1 may be lifted by tying an escaping rope to the main body member 30 or the connecting member 40. Also, for example, a mounting member for attaching the escaping rope may be provided on the side portion of the main body member 30.

In the "unloading process (S3)", a worker on the high-altitude work vehicle unloads the lifted suspended folded plate P from the lifting jig 1. Specifically, as shown in FIG. 7, the worker rotates the suspended folded plate P placed on the placement portion 33, and lowers the suspended folded plate P from the placement portion 33 so that the cushioning material P1 is on the lower side.
In this way, with the lifting jig 1 lifted, the suspended folded plate P can be easily lowered from diagonally above the lifting jig 3 through the opening 34. Therefore, the operation of releasing the engaging member such as a hook is not required, and the suspended folded plate P can be easily loaded and unloaded.
In addition, since the lower surface on which the cushioning material P1 is provided can be placed on the mounting portion 33 with the upper surface facing up, the cushioning material P1 can be protected from the impact when the suspended folded plate P is placed on the mounting portion 33.

In the "installation process (S4)", a worker on a lifting vehicle lifts the suspended folding plate P with the cushioning material P1 positioned on the bottom up to the installation position and installs the suspended folding plate P so that it is suspended from the underside of the installation position (beam).

In this way, because the open portion 34 is formed wide, the suspended folded plate P can be lowered while rotating the suspended folded plate P around the axis of its longitudinal direction. Therefore, even if the suspended folded plate P is placed on the placement portion 33 with the underside on which the cushioning material P1 is provided facing up in order to protect the cushioning material P1 from impact when it is placed on the placement portion 33, it can be easily rotated on a high-altitude work vehicle. Then, with the cushioning material P1 positioned on the lower side, the suspended folded plate P can be lifted up and attached to the underside of the beam.

In the method of lifting the suspended folded plate P using the above-mentioned lifting jig 1, the suspended folded plate P can be easily loaded and unloaded from the front (diagonally upward) through the opening 34. Therefore, the operation of releasing the engaging member such as a hook is not required, and the suspended folded plate P can be easily loaded and unloaded.
Therefore, workability and safety can be improved with a simple configuration.

<Other embodiments>
The lifting jig, the lifting jig, and the method for lifting a suspended folded plate of the present invention are not limited to the above embodiment. In this embodiment, the case of lifting a suspended folded plate P has been described as an example. However, the present invention is not limited to this, and is also suitable for lifting long roof members, column members, cylindrical members, etc.

In the above embodiment, the lifting jig, the lifting jig, and the method for lifting a suspended folded plate according to the present invention have been mainly described.
However, the above embodiment is merely an example for facilitating understanding of the present invention, and does not limit the present invention. The present invention can be modified and improved without departing from the spirit of the present invention, and the present invention naturally includes equivalents thereof.

1 Lifting jig 2 Balance jig 3 Lifting jig 10 Balance member 11 First balance portion 11a, 11b, 11c, 11d First locking piece 11e, 11f, 11g, 11h First engagement piece 12 Second balance portion 12a, 12b Second locking piece 12c, 12d, 12e Second engagement piece 13 Joint portion 13a Flange plate 13b Web plate 14 Connecting wire portion 14a Upper hook 14b Lower hook 20 Wire member 21 First wire portion 21a First hook 22 Second wire portion 22a Second hook 30 Main body member 31 Connecting portion 31a Upper clamp (mounting portion)
31b Front locking piece 31c Rear locking piece 32 Extension portion 32a Reinforcement rib 33 Placement portion 33a Front clamp (mounting portion)
33b Rear clamp (mounting part)
33c Stopper 40 Connection member 41 First connection portion 42 Second connection portion 43 Third connection portion C Crane (hoisting device)
C1 Crane wire P Suspended folding plate (construction member)
P1 Cushioning material

Claims (7)

A lifting jig that is connected to a lifting device and used for lifting a long construction member, on which the construction member is placed and lowered at a predetermined height position,
A plurality of main body members provided at predetermined intervals in the longitudinal direction of the construction member;
A connecting member extending along the longitudinal direction of the construction member and connecting the plurality of main body members,
The main body member is connected to the lifting device and has a connecting portion extending in a direction intersecting the longitudinal direction of the connecting member, an extending portion extending downward from one end of the extending direction of the connecting portion, and a placement portion extending from a lower portion of the extending portion toward the connecting portion in the extending direction of the connecting portion and on which the construction member is placed,
An opening for loading and unloading the construction members from the side is formed on the other end side of the body member in the extending direction of the connecting portion,
A hanging jig, characterized in that the length of the connecting portion in the extending direction is formed shorter than the length of the placement portion in the extending direction. The hanging jig according to claim 1, characterized in that the placement portion has a stopper that protrudes upward from the end portion on the side of the open portion in the extension direction of the placement portion. The hanging jig according to claim 1 or 2, characterized in that the connection member is attached to the tip of the placement part on the side of the open part in the extension direction. the mounting portion has an attachment portion to which the connection member is detachably attached,
3. The hanging jig according to claim 1, wherein a lower end of the connecting member is disposed at the same height as a lower end of the mounting portion or above the lower end of the mounting portion. A lifting jig for a hanging folding plate, comprising the lifting jig described in claim 1 and a balance jig provided between the lifting device and the lifting jig in the vertical direction. A method for lifting a suspended folded plate using the lifting jig according to claim 5,
A placing step of placing the suspended folded plate on the placing portion;
a lifting process of lifting the hanging folding plate using the lifting device;
An unloading process of unloading the lifted hanging folding plate from the placement section,
In the placing step, the suspended foldable plate is placed on the placing portion so that the cushioning material provided on the lower surface of the suspended foldable plate is on the upper side,
The unloading step includes rotating the hanging foldable plate placed on the storage section so that the cushioning material is on the lower side, thereby lowering the hanging foldable plate from the storage section. A method for lifting a hanging foldable plate. The installation step includes attaching the hanging folding plate lowered from the placement portion to a construction position,
The method for lifting a suspended folding plate according to claim 6, characterized in that, in the mounting step, the suspended folding plate with the cushioning material positioned on the lower side is lifted to the installation position, and the suspended folding plate is attached so as to be suspended from the lower surface of the installation position.

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