JPH0635756B2 - Hoisting method for large formwork - Google Patents

Description

The present invention relates to a hoisting method for moving a large wall formwork upward when constructing a reinforced concrete building.

[Conventional technology]

Large formwork is often used for wall formwork in the construction of reinforced concrete buildings. When this floor was completed, this formwork was moved to the upper floor by the following method.

In FIG. 5, 1 is a concrete skeleton, 13 is a large formwork, and 12 is a frame scaffolding. To remove the formwork 13, a crane 17 such as a truck crane or a crawler crane is used.

Lift the wire 20 from the boom 19 of the crane 17 to the formwork 13
The mold 13 is released from the mold and lifted up. This work is performed by the operator on the crane vehicle 18
12 is a personnel structure that requires a signal man and a few carpenters. Under the cooperative work, the large formwork 13 is hoisted to the slab by the hoisting wire 20 at the tip of the crane boom 19.

[Problems to be Solved by the Invention]

However, this construction method requires not only a few people as described above, but also the signaling man and the carpenter work in high places. Moreover, the formwork sways when hoisting the formwork and competes with the concrete skeleton, making work difficult and dangerous, and inefficient.

In addition, there is a scaffold 12, and the formwork 13
A crane with a long reach (working radius) is required to divide the weight of, the machine cost increases, and a place for installing the crane must be secured.

The object of the present invention is to eliminate the inconveniences of the above-mentioned conventional examples, by using the constructed concrete skeleton, without using heavy machinery such as a crane, a small number of people can easily and reliably move the formwork upward, and further the upper floor It is to provide a method for hoisting large formwork that can be easily and quickly moved to.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention provides an anchor bolt on the slab on the upper floor, which is the ceiling of the floor where the construction is completed,
It has a caster that can be retracted downwards, a small hand-wound or electric winch is provided in the back position, a pressing pulley is further provided in the front, and the winding wire of the winch is wound around this pressing pulley and hung from the front end, A carriage having an L-shaped hooking metal having a roller attached to the upper end of the winding wire is fixed to the slab with the anchor bolt while the caster is retracted. The formwork is temporarily received by the restraining ropes that are lowered from the upper part of the frame scaffold, while the hoisting wire of the winch is hung so as to pass between the skeleton and the formwork. Insert an L-shaped hooking metal fitting at the tip of the winding wire into the gap of, fit the inside of the hooking metal fitting to the lower end of the formwork, and superimpose the outer bottom plane thereof on the upper surface of the pier, The rollers of the hooking bracket when winding up the wire winding in serial winch is intended to subject matter that Seriageru formwork by rolling on the walls of the concrete skeleton.

[Action]

According to the present invention, the form is hoisted by the winch installed on the slab on the floor of the concrete skeleton, and the lower end of the form is hooked by the winding wire end of the winch so that the winch is pushed up as it is. It can be hoisted until the formwork is erected above the upper slab, and can enter the framework as it is.

Since the dolly has casters, it has good mobility, and because this caster can move in and out freely, it does not get in the way when the casters are pulled into the body of the dolly when it is fixed with the anchor, and it is fixed with the anchor. The dolly does not move during work because it is present.

On the other hand, when the mold is removed from the mold, it is supported by the pier and is temporarily received by the retaining ropes that are lowered from the top of the frame scaffolding.
After fitting the letter-shaped hooking metal fitting to the lower end of the formwork, the bottom flat surface is set so as to overlap with the upper surface of the pier, so the formwork is supported stably on the pier until the start of winding with the winch. And prevent it from falling due to wind.

In addition, since the L-shaped hooking metal fitting is simply attached to the lower end of the mold by slightly lifting the mold and fitting it, anyone can easily mount it.

Then, when winding the winding wire with the winch, this roller at the tip rolls on the surface of the wall, and the formwork is performed smoothly without contacting the concrete skeleton. It gradually approaches to the upper floor of the existing slab.

〔Example〕

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a vertical sectional side view showing an embodiment of a method for hoisting a large formwork of the present invention, in which 1 is a concrete skeleton.
Is a slab, 1b is a wall, and 1c is a beam.

The wall 1b is constructed using a large mold 13, and in the figure, 2 is the mold.
A spar for supporting 13 and 3 are separator bolts.

According to the present invention, the anchor bolt 4 is provided on the slab 1a on the upper floor, which is the ceiling of the floor on which the construction has been completed, and the carriage 5 of the winch 10 drawn onto the slab 1a is fixed by the anchor bolt 4.

As shown in FIGS. 2 and 3, the winch 10 is provided at the back position of the carriage 5 and is a small hand-wound or transmission type having a winding handle 11. And caster 8
The trolley 5 having a pusher pulley 6 is held in front of the winch 10.
The winding wire 7 of the winch 10 is wound around the pulley 6 so that it can be hung from the front end of the carriage 5.

Further, as shown in FIG. 4, an L-shaped hook metal fitting 16 having a roller 15 attached to the upper outer side was attached to the tip of the winding wire 7.

Anchor bolts 4 are provided on the slab 1a on the upper floor, which is the ceiling of the floor on which construction has been completed, and the carriage 5 drawn onto the slab 1a is fixed by the anchor bolts 4.

It should be noted that the carriage 5 is provided with casters 8 that can be freely retracted and retracted so that it can be moved. Since the casters 8 are used only when the carriage 5 is moved, do not get in the way when the anchor bolts 4 are fixed. Retract.

In this way, the winch 10 is installed on the slab 1a on the upper floor, and the restraint rope 14 is unloaded from the upper part of the frame scaffold 12.
Is fixed to the upper end of the formwork 13.

Then, the mold which is demolded and supported by the slab 2 of the slab 1a
Temporarily receive 13 from the upper part of the frame scaffolding with the rope 14 that is suspended.

On the other hand, the hoisting wire 7 of the winch 10 is hung down between the demolded formwork 13 and the wall 1b of the concrete skeleton 1, and the formwork 13 is slightly lifted to form the wire 7 in the space below the pier 2 and the formwork 13. The L-shaped hooking metal fitting 16 at the end is inserted, and the hooking metal fitting 16 is fitted to the lower end of the mold 13, and
The bottom flat surface of the hook metal 16 is overlapped with the upper surface of the pier 2,
Moreover, the hooks 16 are attached and set on the form 13 so that the rollers 15 are brought into contact with the wall 1b.

Next, the operator of the winch 10 moves the hoisting handle 11 of the winch 10 while watching the hanging condition of the form 13, and winds the hoisting wire.

As a result, the formwork 13 is pulled up by the winch 10. This pulling up causes the roller 15 of the hook metal 16 to roll on the surface of the wall 1b, so that the formwork 13 is made into the concrete frame 1
The formwork 13 is carried out smoothly without contacting with, and the formwork 13 gradually approaches to the upper floor of the slab 1a on which the carriage 5 is installed.

When the formwork 13 slides up to a predetermined position, the separator bolts 3 are used to fix it to the concrete skeleton 1, and then the hooks 16 are removed from the formwork 13 to wind up the wire 7.
Is stored and the carriage 5 is moved to the next place of use.

In the present embodiment, the number of winches 10 and bogies 5 is one. However, when the formwork 13 is extremely large, a plurality of bogies 5 are arranged according to the size of the winches 10. It is sufficient to lift the formwork 13 at the same time.

〔The invention's effect〕

As described above, the hoisting method of the large formwork of the present invention is, after placing concrete, the large formwork separated from the concrete surface, without using a heavy machine such as a crane, using a small winch, safely, And it is easy to approach, and it is possible to move to the upper floor quickly and easily,
It requires only a small number of workers, has a low machine cost, is economical, and has high work efficiency.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of a method for hoisting a large formwork of the present invention, and FIG. 2 is a side view of a winch used.
FIG. 3 is a plan view of the same as above, FIG. 4 is a front view of a main portion in a suspended state, and FIG. 5 is a side view showing a conventional example. 1 ... Concrete skeleton, 1a ... Slab 1b ... Wall, 1c. 8 …… Caster 10 …… Winch, 11 …… Winding handle 12 …… Frame scaffolding, 13 …… Large formwork 14 …… Standing rope, 15 …… Roller 16 …… Hooking metal fittings, 17 …… Crane 18 …… Crane vehicle, 19 ... boom, 20 ... hanging wire

Claims (1)

[Claims] 1. An anchor bolt is provided on a slab on the upper floor, which is the ceiling of the floor on which construction has been completed, a caster that can be retracted downward is provided, and a small hand-wound or electric winch is provided at the back position. A truck equipped with a pressing pulley at the front, the winding wire of the winch wound around the pressing pulley and hanging from the front end, and an L-shaped hooking metal having a roller attached to the upper outside of the winding wire is attached to the carriage. With the casters retracted, secure the slab on the slab with the anchor bolts, demold and temporarily receive the formwork supported by the pier with the retaining ropes that are unloaded from the upper part of the frame scaffolding. The hoisting wire of the winch is suspended so as to pass through, and the formwork is slightly lifted, and the L-shaped hooking metal fitting at the tip of the hoisting wire is inserted into the gap between the stile and the formwork. The inner side of the metal fitting is attached to the lower end of the formwork, and the outer bottom plane is overlapped with the upper surface of the pier, and the roller of the hook metal is placed on the wall surface of the concrete frame when winding the winding wire with the winch. A method of hoisting a large formwork, characterized by rolling it up and pushing up the formwork.