JP5764079B2 - Lifting device - Google Patents

Description

The present invention relates to a hanging-up system.

  When constructing a structure, a vertical member may be lifted using a lifting machine such as a crane and built in a predetermined position.

  For example, as shown in Patent Document 1, a hanging rope is fixed to an upper end portion and a lower end portion of a longitudinal member, and the hanging rope is lifted by a lifting machine such as a crane, as shown in Patent Document 1. There is a method to build a vertical bar in the position.

However, the erection method requires that the longitudinal member itself has rigidity.
For this reason, it could not be used for building PC steel bars or reinforcing bars.

  Patent Document 2 discloses a method in which a lifting tool is provided at the upper end of a vertical member, and is lifted by a lifting machine such as a crane via a rope extending from the lifting tool.

Japanese Patent No. 2987374 Japanese Patent No. 4339487

In the method of Patent Document 2, it is necessary to assemble a scaffold so that an operator's hand can reach a jig fixed to the upper end. As a result, the scaffolding work takes time and money.
In addition, since it takes time to install and remove the jig on each longitudinal member, it has been an obstacle to shortening the construction period when many longitudinal members are built.

The present invention has an object to solve the above problems, it allows to enhance the work efficiency at the time like an anchor of the vertical member and then, and reduction in construction costs possible and the hanging up system It is an issue to propose.

In order to solve the above-mentioned problems, the lifting device of the present invention includes a suspension rope wound around the upper and middle portions of the vertical member, and a latch connected to the lower end of the vertical member connected to the suspension rope. a Department, the pulley the suspension rope is wound around, and a fastener attached to said pulley, is characterized that you have the locking portion is attached to said fastener.

  According to such a lifting device, it is possible to easily attach and detach to / from the vertical member, and therefore it is possible to improve work efficiency.

The lifting device includes a pulley which the hanging rope is reeved, and a fastener attached to the pulley, because have the locking portion is attached to the fastener, using a pulley It becomes possible to bind the suspension rope more strongly.

  Further, the suspension rope includes an upper suspension rope wound around an upper portion and an intermediate portion of the longitudinal member, a lower suspension rope hung around the pulley, the upper suspension rope, and the lower suspension rope. If the connecting tool to be connected is provided, the upper suspension rope and the lower suspension rope can be divided when attaching and detaching the lifting device, so that the lifting device can be easily attached and detached.

According to the hanging-up system of the present invention, allows to increase the working efficiency of the longitudinal members like an anchor work and then, and it is possible to reduce the construction costs.

It is a figure which shows the ground tank in which the vertical member which concerns on this embodiment was installed, Comprising: (a) is a written drawing, (b) is a partial expanded sectional view. It is a perspective view which shows the lifting condition of a vertical member. It is a figure which shows the lifting apparatus of this embodiment.

This embodiment demonstrates the case where the vertical member 10 is built at the time of construction | assembly of the ground tank 1. FIG.
As shown in FIG. 1, the ground tank 1 includes a bottom plate 11, a side wall 12, a vertical member 10, a horizontal member 13, and a roof 14.

  A liquid or the like is accommodated in the internal space of the ground tank 1 (the space surrounded by the bottom plate 11, the side wall 12, and the roof 14). In addition, the accommodation of the ground tank 1 is not limited, For example, LNG, LPG, industrial water etc. can be accommodated.

  The ground tank 1 of the present embodiment is configured by a double structure in which an inner tank plate 15 is provided inside the bottom plate 11, the side wall 12 and the roof 14. A cold insulating material 16 is filled between the bottom plate 11, the side wall 12 and the roof 14 and the inner tank plate 15. The ground tank 1 does not necessarily have a double structure.

The bottom plate 11 is a reinforced concrete plate-like member formed on the ground, and also serves as a direct foundation.
The bottom plate 11 does not necessarily have to serve as a foundation, and a foundation structure may be constructed separately from the bottom plate 11. Moreover, a pile foundation or a piled raft foundation may be applied as the foundation structure of the ground tank 1.

  The side wall 12 is a reinforced concrete member that constitutes a liquid barrier, and is erected on the upper surface of the bottom plate 11. The lower end of the side wall 12 is rigidly connected to the bottom plate 11. The side wall 12 of this embodiment is formed in a cylindrical shape. The shape of the side wall 12 is not limited to a cylindrical shape, and may be appropriately formed.

The side wall 12 is provided with vertical bars (not shown) arranged at a predetermined pitch in the circumferential direction and horizontal bars (not shown) arranged at a predetermined pitch in the vertical direction.
In addition, you may arrange a shear reinforcement bar as needed.

As shown in FIG. 1, tension members (vertical members 10 and cross members 13) are embedded in the side walls 12.
The longitudinal member 10 is a tension member in the longitudinal direction (vertical direction), and is continuously disposed in the vertical direction near the center of the side wall 12 in the thickness direction. The lower end of the vertical member 10 is fixed to the bottom plate 11. A plurality of vertical members 10, 10,... Are disposed on the side wall 12 at intervals in the circumferential direction of the side wall 12.

In this embodiment, a PC steel rod is used as the vertical member 10, but the material constituting the vertical member 10 is not limited. For example, a PC steel wire or a PC stranded wire may be used.
A tension force is introduced into the vertical member 10 and a vertical compressive force is applied to the side wall 12. By doing so, the bending strength of the side wall 12 is increased.

The cross member 13 is a tension member in the circumferential direction (transverse direction), and is disposed outside the vertical member 10 in the side wall 12.
In the present embodiment, a PC stranded wire is used as the cross member 13, but the material constituting the cross member 13 is not limited. For example, a PC steel wire or a PC steel rod may be used.

  A tension force is introduced into the cross member 13 and a circumferential compressive force is applied to the side wall 12. By doing so, it is possible to eliminate or reduce the tensile force that may be generated in the circumferential direction of the side wall 12 due to the hydraulic pressure in the ground tank 1 or the like.

  As shown in FIG. 1, the roof 14 is a dome-shaped concrete or steel member supported on the upper portion of the side wall 12. The material constituting the roof 14 is not limited. Further, the shape of the roof 14 is not limited, and may be appropriately formed according to the shape of the side wall 12, the accommodation, etc., for example, it is formed in a flat plate shape.

As shown in FIG. 2, the vertical member 10 is erected in a state where the vertical member 10 is lifted vertically by the lifting device 2.
In the present embodiment, the lower end of the vertical member 10 is connected to the upper end of the existing vertical member 10, but the installation location of the vertical member 10 is not limited.

  The lifting device 2 is for lifting the vertical member 10 and includes a suspension rope 21, a locking portion 22, a pulley 23, and a fastener 24 as shown in FIG. 3.

The suspension rope 21 is wound around the upper part and the middle part of the longitudinal member 10.
The suspension rope 21 of the present embodiment includes an upper suspension rope 25 that is wound around the upper portion and the middle portion of the longitudinal member 10, a lower suspension rope 26 that is wrapped around a pulley 23, an upper suspension rope 25, and a lower suspension. A connecting tool 27 that connects the rope 26 is provided.

  The locking portion 22 is locked to the lower end of the longitudinal member 10 and is connected to the hanging rope 21. The locking portion 22 of the present embodiment is configured by a bottomed cylindrical member, and holds the lower end portion of the vertical member 10. The lower end portion of the vertical member 10 is inserted into the locking portion 22, and the bottom surface of the locking portion 22 is locked to the lower end of the vertical member 10. In addition, the structure of the latching | locking part 22 is not limited.

A suspension rope 21 (lower suspension rope 26) is hung around the pulley 23. Further, a fastener 24 is attached to the pulley 23.
The fastener 24 is attached to the locking portion 22.
That is, the locking portion 22 is connected to the suspension rope 21 via the pulley 23 and the fastener 24.

Hereinafter, a method for building up the vertical member using the lifting device 2 will be described.
The method of building up the vertical member includes a preparation process, an attachment process, a lifting process, an arrangement process, a fixing process, and a removing process.

The preparation process is a process of preparing the lifting device 2.
In the preparation step, the locking portion 22 and the pulley 23 are connected via the fastener 24 and the lower suspension rope 26 is hung around the pulley 23.

  The attachment step is a step of locking the locking portion 22 to the lower end of the vertical member 10 and winding the suspension rope 21 around the upper portion and the middle portion of the vertical member 10.

  The locking portion 22 is placed on the lower end of the vertical member 10 and is locked to the lower end of the vertical member 10. The lower end of the vertical member 10 is brought into contact with the bottom of the locking portion 22.

  The upper suspension rope 25 is wound around two places, that is, the upper end portion and the intermediate portion of the longitudinal member 10. It is assumed that the upper suspension rope 25 is wound once at the upper end portion of the longitudinal member 10 and the upper suspension rope 25 is wound twice at the intermediate portion of the longitudinal member 10. In addition, the winding frequency of the suspension rope 21 is not limited.

  The upper suspension rope 25 is wound around the vertical member 10 in a state where the periphery of the vertical member 10 is made to make a round and intersect. That is, the upper suspending rope 25 is not wound around the vertical member 10 in a spiral shape, and after making a round of the vertical member 10, it crosses in a cross shape so that one end side extends upward and the other end side extends downward. Wrap around.

  When the upper suspension rope 25 is wound around the vertical member 10, the lower end side of the lower suspension rope 26 (the side opposite to the upper suspension rope 25) is pulled, and the locking portion 22 and the portion of the suspension rope 21 that is wound around the longitudinal member 10 Make the gap between.

  The upper suspension rope 25 and the lower suspension rope 26 may be coupled in the preparation step, or may be coupled after the upper suspension rope 25 is wound around the vertical member 10.

The lifting process is a process of hanging the suspension rope 21 on the hook 30 of the lifting machine, lifting the vertical member 10 so as to be in the vertical direction, and binding the winding portion of the suspension rope 21 (see FIG. 2).
When the suspension rope 21 that has crossed the circumference of the longitudinal member 10 is lifted, the suspension rope 21 is tightly coupled to the longitudinal member 10, so that the longitudinal member 10 is lifted without falling off.

An arrangement | positioning process is a process of moving the vertical member 10 to a predetermined position using a lifting machine.
The vertical member 10 moves while maintaining the vertical state (see FIG. 2).

The fixing step is a step of fixing the vertical member 10 moved in the arranging step.
The vertical member 10 is fixed in such a manner that the vertical member 10 is erected at a predetermined position (the upper end of the existing vertical member 10) in a state where the locking portion 22 is removed and the lower end portion of the vertical member 10 is exposed. Note that the locking portion 22 is removed by loosening the lower suspension rope 26 via the pulley 23. At this time, since the upper suspension rope 25 is maintained in a tightly coupled state around the longitudinal member 10, the longitudinal member 10 does not fall (fall off).

The removal step is a step of removing the lifting device 2 from the longitudinal member 10.
The lifting device 2 is performed by lowering the hook 30 of the lifting machine. When the hook 30 is lowered, the winding portion of the suspension rope 21 is loosened, so that the lifting device 2 descends along the vertical member 10. Then, the lifting device 2 is removed by unwinding the suspension rope 21 at the lower end of the vertical member 10.

According to the vertical member erection method and lifting device of the present embodiment, the vertical member 10 can be efficiently erected.
That is, since the lifting device 2 descends downward by installing the vertical member 10 and then lowering the hook 30, the lifting device 2 can be removed at the lower end portion of the vertical member 10. Therefore, it is possible to omit a scaffold for performing work at the upper end portion of the vertical member 10.

  Moreover, since the vertical member 10 is lifted by the suspension rope 21 wound around the upper end portion and the intermediate portion, the vertical member 10 can be moved in a vertical state regardless of the rigidity of the vertical member 10 itself. Since the vertical member 10 is moved in the vertical direction as described above, when the vertical member 10 is attached to a predetermined position, the work of standing the vertical member 10 can be omitted, so that the workability is excellent.

  Since the vertical member 10 is fastened at the upper end portion and the intermediate portion, it can be moved safely. Furthermore, since the lower end portion of the vertical member 10 is locked to the locking portion 22, the work can be performed more safely.

  The embodiment according to the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and the above-described components can be appropriately changed without departing from the spirit of the present invention.

  In the above-described embodiment, the case where the vertical member of the ground tank is built has been described, but the structure constructed by the method of building the vertical member of the present embodiment is not limited to the ground tank, and any vertical member is used. It is applicable to the structure that has it.

In the above embodiment, tendon using a hanging-up device of the present invention has been described lifting the (PC steel), Tatezai is not limited to the tendon, for example, reinforcing bar and steel material or the like It may be.

  In the above-described embodiment, the case where the suspension rope is configured by combining the upper suspension rope and the lower suspension rope has been described. However, the suspension rope may be configured by one rope, or three or more ropes. It may be configured.

  In the above-described embodiment, the case where the pulley is disposed at the lower end portion of the suspension rope has been described, but the pulley may be disposed as necessary and may be omitted. The hanging rope and the locking portion may be directly connected.

DESCRIPTION OF SYMBOLS 1 Ground tank 10 Vertical member 2 Lifting device 21 Hanging rope 22 Locking part 23 Pulley 24 Stopper 25 Upper suspension rope 26 Lower suspension rope 27 Connection tool 30 Hook

Claims (2)

A lifting device for lifting a vertical member,
A suspension rope wound around the upper part and middle part of the vertical member,
A locking portion connected to the suspension rope and locked to the lower end of the vertical member;
A pulley on which the suspension rope is hung,
A fastener attached to the pulley,
Hanging up system you characterized in that the locking portion to the fastener is attached. An upper suspension rope wound around the upper portion and the middle portion of the vertical member,
Characterized in that it comprises a lower suspension rope wound around said pulley, and a connector for connecting the upper hanging rope and the lower suspension rope, lifting device according to claim 1.

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