JP7558832B2 - Lifting device and method for constructing lifting device - Google Patents

Description

The present invention relates to a lifting device and a method for installing the lifting device.

Normally, when installing supports for reinforcing or replacing the main slab in the space under the girders of an existing viaduct, a mobile crane is used to lift the materials. However, in places where there is insufficient space under the girders, the boom of the mobile crane may come into contact with the existing viaduct, making it impossible to use the mobile crane.

Conventionally, Patent Document 1 discloses a temporary construction work device for working on structures. The temporary construction work device of Patent Document 1 comprises a hanger rail that is attached along the structure, a hoisting machine that is movably mounted on the hanger rail, a second hoisting machine that is suspended by the hoisting machine and is connected to the hoisting machine in a state in which it can rotate along a horizontal plane, and a truss beam that is supported by the hoisting machine.

Japanese Patent Application Publication No. 1-287363

However, in the technology disclosed in Patent Document 1, the hanger rail is attached to an existing upper support beam, so the load of the hanger rail and other components acts downward on the upper support beam, posing safety issues such as the risk of the hanger rail falling.

The present invention was devised in consideration of the above-mentioned problems, and its purpose is to provide a lifting device and a construction method for the lifting device that makes it possible to lift materials in the space under an elevated structure and improve safety.

The lifting device of the present invention is a lifting device used when lifting materials in the space under an elevated structure, and comprises an upper receiving bracket placed on the upper side of the elevated structure, a rail section arranged on the underside of the elevated structure, a connecting member connecting the upper receiving bracket and the rail section, and a lifting machine movable along the rail section, wherein the upper receiving bracket is erected on a first elevated structure and a second elevated structure erected at a distance from the first elevated structure, and the connecting member is arranged between the first elevated structure and the second elevated structure .
The lifting device of the present invention is a lifting device used when lifting materials in the space under an elevated structure, and comprises an upper receiving bracket placed on the upper side of the elevated structure, a rail section arranged on the underside of the elevated structure, a connecting member connecting the upper receiving bracket and the rail section, and a lifting machine movable along the rail section, wherein the connecting member is arranged in a through hole that penetrates from the upper side to the underside of the elevated structure.
The lifting device of the present invention is a lifting device used when lifting materials in the space under an elevated structure, and comprises an upper receiving bracket placed on the upper side of the elevated structure, a rail section arranged on the underside of the elevated structure, a connecting member connecting the upper receiving bracket and the rail section, and a lifting machine capable of moving along the rail section, wherein the rail section has a first plate section arranged opposite the underside of the elevated structure, and an adjustment member that penetrates the first plate section and is capable of adjusting the protruding length from the upper surface of the first plate section.

The construction method of the lifting device of the present invention comprises an installation process in which an upper receiving bracket is placed on the upper side of an elevated structure and a connecting member is used to connect the upper receiving bracket to a rail section arranged on the underside of the elevated structure, and an attachment process in which a lifting machine capable of moving along the rail section is attached to the rail section , wherein the upper receiving bracket is erected on a first elevated structure and a second elevated structure erected at a distance from the first elevated structure, and during the installation process, the connecting member is placed between the first elevated structure and the second elevated structure .
The construction method of the lifting device of the present invention comprises an installation process in which an upper receiving bracket is placed on the upper side of an elevated structure and the upper receiving bracket and a rail section arranged on the underside of the elevated structure are connected with a connecting member, and an attachment process in which a lifting machine movable along the rail section is attached to the rail section, wherein the installation process is characterized in that the connecting member is placed in a through hole that penetrates from the upper side to the underside of the elevated structure.
The construction method of the lifting device of the present invention comprises an installation process in which an upper receiving bracket is placed on the upper surface of an elevated structure and the upper receiving bracket and a rail section arranged on the underside of the elevated structure are connected by a connecting member, and an attachment process in which a lifting machine capable of moving along the rail section is attached to the rail section, wherein the rail section has a first plate section arranged opposite the underside of the elevated structure, and an adjustment member that penetrates the first plate section and is capable of adjusting the protruding length from the upper surface of the first plate section, and the installation process is characterized in that the protruding length of the adjustment member from the upper surface of the first plate section is adjusted and the upper end of the adjustment member is brought into contact with the underside of the elevated structure.

The present invention provides technology that makes it possible to lift materials in the space under an elevated structure, thereby improving safety.

FIG. 1 is a diagram showing an example of an elevated structure in which a lifting device according to a first embodiment is used. FIG. 2 is an enlarged view of the lifting device according to the first embodiment. FIG. 3 is a diagram showing an example of a method of using the lifting device according to the first embodiment. FIG. 4 is an enlarged view of a lifting device according to the second embodiment.

The lifting device and the method for constructing the lifting device according to the embodiment will be described in detail below with reference to the drawings.

First Embodiment
As shown in Fig. 1, a lifting device 1 according to the first embodiment is used to lift materials in a space below an elevated structure 9 such as a bridge. The lifting device 1 is used during assembly and dismantling of supports 8 for holding a main slab 93 of the elevated structure 9 when reinforcing and replacing the main slab 93. The elevated structure 9 has a first elevated structure 91 and a second elevated structure 92 erected at a distance from the first elevated structure 91. The lifting device 1 is provided between the first elevated structure 91 and the second elevated structure 92.

As shown in FIG. 2, the lifting device 1 includes a lifting machine 5 and a holding section 6 that holds the lifting machine 5 to an elevated structure 9. The holding section 6 includes an upper receiving bracket 2, a rail section 3, and a connecting member 4.

The upper receiving bracket 2 is placed on the upper surface 9a side of the elevated structure 9. The upper receiving bracket 2 is erected between the first elevated structure 91 and the second elevated structure 92. The upper receiving bracket 2 is made of steel such as H-shaped steel or channel steel.

The rail portion 3 is disposed on the underside 9b of the elevated structure 9. The rail portion 3 has a first plate portion 31, a rail body portion 32, and an adjustment member 33.

The first plate portion 31 is made of a steel plate or the like and is disposed opposite the underside 9b of the elevated structure 9. The first plate portion 31 is disposed so as to straddle the first elevated structure 91 and the second elevated structure 92. The rail main body portion 32 is made of an I-beam or the like.

The adjustment member 33 is, for example, a bolt that penetrates the first plate portion 31. The adjustment member 33 is capable of adjusting the length of protrusion from the upper surface of the first plate portion 31, and the upper end of the adjustment member 33 is in contact with the lower surface 9b of the elevated structure 9. The adjustment member 33 fixes the rail main body portion 32 to the first plate portion 31. The adjustment members 33 are arranged on both sides of the connecting member 4.

Here, the height of the undersides 9b of the elevated structures 9 on both sides of the connecting member 4 may differ. For example, the height of the underside 9b of the first elevated structure 91 is positioned higher than the height of the underside 9b of the second elevated structure 92.

The connecting member 4 connects the rail section 3 and the lifting machine 5. The connecting member 4 is composed of, for example, a rod-shaped member 41 such as a PC steel bar extending in the height direction Z, and a nut 42 that can be screwed onto the rod-shaped member 41. The connecting member 4 is disposed between the first elevated structure 91 and the second elevated structure 92, S.

The lifting machine 5 is capable of lifting materials, and for example, an electric chain block is used. The lifting machine 5 is capable of moving by traveling along the rail section 3. The lifting machine 5 is also capable of rotating horizontally.

Next, we will explain the construction method of the lifting device according to the first embodiment. The construction method of the lifting device includes an installation process and an attachment process that is performed after the installation process.

First, in the installation process, the upper receiving bracket 2 is placed on the upper surface 9a side of the elevated structure 9. In the installation process, the upper receiving bracket 2 is erected between the first elevated structure 91 and the second elevated structure 92, which are erected with a gap between them in the direction perpendicular to the bridge axis Y. Multiple upper receiving brackets 2 are provided in the bridge axis direction X.

In the installation process, the connecting member 4 is installed on the upper bracket 2 using a high-altitude work vehicle or the like. The connecting member 4 is placed between the first elevated structure 91 and the second elevated structure 92.

In the installation process, the rail section 3 is installed on the connecting member 4 using a high-altitude work vehicle or the like. As a result, the upper receiving bracket 2 and the rail section 3 are connected by the connecting member 4. In detail, in the installation process, the first plate section 31 is placed facing the lower surface 9b of the elevated structure 9, and the first plate section 31 is connected to the connecting member 4. In the installation process, the rail main body section 32 is fixed to the first plate section 31 by the adjustment member 33. At this time, the protruding length of the adjustment member 33 from the upper surface of the first plate section 31 is adjusted, and the upper end of the adjustment member 33 is brought into contact with the lower surface 9b of the elevated structure 9. This allows the rail main body section 32 to be adjusted horizontally. The rail sections 3 are provided sequentially so as to extend in the bridge axis direction X.

Next, in the installation process, the lifting machine 5 is attached to the rail main body 32.

This completes the construction method for the lifting device according to the first embodiment.

When assembling the shoring 8 using the lifting device 1, as shown in FIG. 3, the girder 81 in the material yard is lifted by the lifting machine 5. The lifting machine 5 is then moved along the rail section 3 to the assembly location of the shoring 8. The lifting machine 5 is then rotated horizontally to install the girder 81 and assemble the shoring 8.

According to this embodiment, a lifting machine 5 that can move along the rail section 3 is provided. This makes it possible to lift materials such as long beams 81 in the space below the elevated structure 9.

According to this embodiment, an upper receiving bracket 2 is provided that is placed on the upper surface 9a side of the elevated structure 9. This allows the upper receiving bracket 2, on which the load of the rail section 3 acts, to be supported from below the existing elevated structure 9. This allows the rail section 3 to be held in a more stable state, making it possible to increase safety.

According to this embodiment, the upper receiving bracket 2 is installed on the first elevated structure 91 and the second elevated structure 92 that is erected at a distance from the first elevated structure 91, and the connecting member 4 is disposed between the first elevated structure 91 and the second elevated structure 92. This allows the upper receiving bracket 2 and the rail section 3 to be connected by the connecting member 4 in a short time without requiring work such as drilling holes in the first elevated structure 91 and the second elevated structure 92. This allows the construction time to be shortened.

In addition, according to this embodiment, the connecting member 4 is disposed between the first elevated structure 91 and the second elevated structure 92. As a result, even when the first elevated structure 91 and the second elevated structure 92 are in service and vehicles are passing between them, the upper receiving bracket 2 does not impede the passage of vehicles. Therefore, even when the elevated structure 9 is in service, the lifting device 1 can be installed without traffic restrictions.

According to this embodiment, there is a first plate portion 31 arranged opposite the underside 9b of the elevated structure 9, and an adjustment member 33 that penetrates the first plate portion 31 and can adjust the length of its protrusion from the upper surface of the first plate portion 31. As a result, even if the height of the underside 9b of the first elevated structure 91 and the height of the underside 9b of the second elevated structure 92 are different, it is possible to adjust the rail portion 3 horizontally by adjusting the protruding length of the adjustment member 33.

According to this embodiment, the adjustment members 33 are placed on both sides of the connecting member 4. This makes it easier to adjust the rail portion 3 horizontally. This makes it possible to shorten the construction time of the lifting device 1.

Second Embodiment
In the lifting device 1 according to the second embodiment, as shown in FIG. 4, the connecting member 4 is disposed in a through hole 99 penetrating from the upper surface 9a side to the lower surface side of the elevated structure 9.

Next, we will explain the construction method of the lifting device according to the second embodiment. The construction method of the lifting device includes an installation process and an attachment process that is performed after the installation process.

First, in the installation process, the upper receiving bracket is placed on the upper surface 9a of the elevated structure 9. Multiple upper receiving brackets 2 are provided in the bridge axis direction X.

In the installation process, a through hole 99 is drilled from the upper surface 9a of the elevated structure 9 toward the lower surface 9b using a drilling device, a connecting member 4 is placed in the through hole 99, and the connecting member 4 is installed on the upper receiving bracket 2. Note that if the through hole 99 has been prepared in advance, the connecting member 4 can be placed in the through hole 99 without performing the drilling work.

In the installation process, the rail section 3 is installed on the connecting member 4 using a high-altitude work vehicle or the like. This connects the upper receiving bracket 2 and the rail section 3 with the connecting member 4. Details are omitted as they are the same as in the first embodiment.

Next, in the installation process, the lifting machine 5 is attached to the rail main body 32, similar to the first embodiment.

This completes the construction method for the lifting device according to the second embodiment.

According to this embodiment, the connecting member 4 is placed in a through hole 99 that penetrates from the upper surface 9a side to the lower surface 9b side of the elevated structure 9. This allows the position of the upper support bracket 2 placed on the upper surface 9a side of the elevated structure 9 to be set according to the position where the through hole 99 is drilled. This allows for a high degree of freedom in the construction of the lifting device 1.

Although an embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. Furthermore, the above embodiment can be variously omitted, substituted, or modified without departing from the gist of the invention. Such novel forms and modifications are included within the scope and gist of the invention, as well as within the scope of the invention described in the claims, and equivalents of the invention described in the claims.

1: Lifting device 2: Upper support bracket 3: Rail section 31: First plate section 32: Rail body section 33: Adjustment member 4: Connection member 5: Lifting machine 6: Holding section 8: Support 81: Beam 9: Elevated structure 9a: Upper surface 9b: Lower surface 91: First elevated structure 92: Second elevated structure 93: Main slab 99: Through hole X: Bridge axis direction Y: Direction perpendicular to the bridge axis Z: Height direction

Claims (7)

A lifting device used to lift materials in the space under an elevated structure,
An upper support bracket placed on the upper surface side of the elevated structure;
A rail portion disposed on the underside of an elevated structure;
A connecting member that connects the upper receiving metal fitting and the rail portion;
A lifting machine movable along the rail portion ,
The upper receiving bracket is installed on a first elevated structure and a second elevated structure erected at a distance from the first elevated structure,
A lifting device according to claim 1, wherein the connecting member is disposed between the first elevated structure and the second elevated structure . A lifting device used to lift materials in the space under an elevated structure,
An upper support bracket placed on the upper surface side of the elevated structure;
A rail portion disposed on the underside of an elevated structure;
A connecting member that connects the upper receiving metal fitting and the rail portion;
A lifting machine movable along the rail portion ,
A lifting device characterized in that the connecting member is disposed in a through hole penetrating from the upper surface side to the lower surface side of an elevated structure . A lifting device used to lift materials in the space under an elevated structure,
An upper support bracket placed on the upper surface side of the elevated structure;
A rail portion disposed on the underside of an elevated structure;
A connecting member that connects the upper receiving metal fitting and the rail portion;
A lifting machine movable along the rail portion,
The rail portion is
A first plate portion disposed opposite to the underside of the elevated structure;
An adjustment member that is inserted through the first plate portion and is capable of adjusting a length of protrusion from an upper surface of the first plate portion.
A lifting device comprising : The lifting device according to claim 3 , wherein the adjustment members are arranged on both sides of the connecting member. an installation process in which an upper receiving bracket is placed on the upper surface side of an elevated structure and the upper receiving bracket and a rail portion disposed on the lower surface side of the elevated structure are connected to each other by a connecting member;
and an attachment step of attaching a lifting machine movable along the rail portion to the rail portion ,
The upper receiving bracket is installed on a first elevated structure and a second elevated structure erected at a distance from the first elevated structure,
A method for constructing a lifting device, wherein in the installation step, the connecting member is disposed between the first elevated structure and the second elevated structure . an installation process in which an upper receiving bracket is placed on the upper surface side of an elevated structure and the upper receiving bracket and a rail portion disposed on the lower surface side of the elevated structure are connected to each other by a connecting member;
and an attachment step of attaching a lifting machine movable along the rail portion to the rail portion ,
The installation step comprises arranging the connecting member in a through hole extending from the upper surface side to the lower surface side of an elevated structure . an installation process in which an upper receiving bracket is placed on the upper surface side of an elevated structure and the upper receiving bracket and a rail portion disposed on the lower surface side of the elevated structure are connected to each other by a connecting member;
and an attachment step of attaching a lifting machine movable along the rail portion to the rail portion ,
The rail portion is
A first plate portion disposed opposite to the underside of the elevated structure;
An adjustment member that is inserted through the first plate portion and is capable of adjusting a length of protrusion from an upper surface of the first plate portion.
and
The installation step includes adjusting a protruding length of the adjustment member from an upper surface of the first plate portion, and bringing an upper end of the adjustment member into contact with an underside of an elevated structure .

Images