JPH0327700B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a concrete pouring device for pouring concrete into a position with a high head.

As the scale of an underground structure increases, its construction depth also increases, and when it comes to concrete work for this purpose, there are many cases where the amount of concrete placed underground exceeds that above ground.

Therefore, when pouring concrete into a position with such a high head, when concrete is poured using a conventional vertical chute, separation of the concrete aggregate may occur, or the high head may cause a large impact on the pouring area. Increased risk of work.

The applicant has already filed an application for a chute for concrete pouring that eliminates these drawbacks, feeds concrete stepwise in a vertical chute, prevents separation of concrete aggregate, and reduces the impact of drops. . This chute is as shown in FIGS. 1 and 2. That is, as shown in Figure 1,
1 is a flexible material or a chute made of a flexible material at predetermined intervals, and 2 is a valve device that is wound around the outer periphery of the chute at predetermined intervals of the chute 1 to control air pressure P within the surrounding frame 3. Tube 4 supplied with
is installed in a manner surrounding the chute 1.

Therefore, the valve function of the valve device 2 is closed when the tube 4 is inflated by the air pressure P and crushes the chute 1 and blocks the concrete passage. The weight of concrete when a certain amount of concrete 5 accumulates inside the chute 1 partitioned by the valve device 2 which is closed at 2 is the air pressure P.
It overcomes the closing force of the valve device 2 caused by the valve device 2 and automatically acts like a valve opening, causing a part of the accumulated concrete to fall toward the next valve device 2, and this is repeated one after another to supply concrete 5. go. 1st
Figures a, b, c and d show this state, in which the valve device 2 is supplied with air pressure P and closes the chute 1 at predetermined intervals. When the concrete 5 is now supplied from above, the concrete 5 accumulates in the upper part of the inside of the chute 1 which is closed by the first valve device 2, as shown in FIG. 1a. Then, when a certain amount of accumulated concrete 5 is reached, the valve device 2 is pushed open in the opening direction by the weight of the accumulated concrete 5, and a part of the accumulated concrete 5 passes through the first valve device, and then the valve device 2 is opened. It accumulates in the upper part of the inside of the chute 1 which is closed by the second valve device 2, as shown in FIG. 1b. As the concrete 5 is sequentially supplied, the amount of concrete 5 accumulated in the upper part of the inside of the chute 1 closed by the second valve device 2 increases as shown in FIG. 1c.

Then, when the concrete 5 accumulated in the upper part of the inside of the chute 1 closed by the second valve device 2 reaches a certain amount, the second valve device 2 is pushed open in the opening direction and the concrete 5 accumulates. A portion of the pooled concrete 5 falls into the upper part of the inside of the chute 1 which is closed by the third valve device 2, as shown in FIG. 1d.

Since the above action is repeated and the concrete 1 is supplied, the head that must be considered for the concrete 5 is the predetermined interval at which the valve device 2 is arranged, and there is no separation of concrete aggregate. This also solves the problem of impact caused by high drops.

Note that the chute 1 must be flexible at least at the portion through which the valve device 2 is inserted, that is, at predetermined intervals.

Further, in an example of the valve device 2, as shown in the cross section in FIG. 2, the enclosing frame 3 is divided into two parts with a hinge 6 to facilitate installation and removal.
indicates bolts and nuts for closing the surrounding frame 3. Reference numeral 4 denotes a tube installed within the surrounding frame 3 to surround the inserted chute portion 1;
The air hole is fitted with a cap 8 that is attached to a hole provided in the surrounding frame 3, and is connected to an air hose 9 through the cap 8, so that air pressure is supplied through the air hose 9. Note that 10 is a protective cover for the air hose 9.

An object of the present invention is to provide a concrete placing device that uses the above-mentioned valved chute to expand its placing range, and its gist is to provide a swing arm of a swing type crane. A chute is provided movably along the swing arm at the lower end of one half of the body and is made of a flexible material at the tip or is made of a flexible material at predetermined intervals, and the chute is provided at predetermined intervals in a winding manner around the outer circumference of the chute. a first hopper connected to a chute with a valve and a valve device that acts as a valve to close the chute when supplied with air pressure; a fixed conveyor for conveying concrete arranged in a row; a fixed conveyor connected to a first hopper and movable along the upper surface of the fixed conveyor;
By providing a concrete placing device equipped with a movable scraper that supplies concrete on a fixed conveyor to a first hopper, and a second hopper that is fixed to a swing arm and receives concrete brought in from the outside onto the fixed conveyor, A hopper connected to the above-described valved chute is moved to a position corresponding to the concrete placement position, concrete supplied from the outside is conveyed to the hopper position, and this concrete is poured vertically through the valved chute. The weight of the chute with a valve increases as the head height increases, making it difficult to place concrete in the conventional method of pulling the lower end of the chute sideways and placing the concrete in place. If the height of the trolley is enlarged and the height position of the trolley can be freely changed, it can be easily adapted to various concrete placement locations.

This will be explained in detail below based on the drawings.

That is, FIGS. 3a, 3b, and 3c are a plan view, a front view, and an enlarged detailed view of the swing arm of an embodiment of the concrete pouring apparatus of the present invention.

As shown in the figure, a first hopper 17 with the above-mentioned valved chute 11 connected to the tip is located below one half of the swing arm 31 of the swing type crane.
It is movably provided along 1.

Above the other half of the swing arm 31, the swing arm 3
A fixed conveyor 33 for conveying concrete is provided over almost the entire length of the container. A movable scraper 38 is set along the upper surface of the fixed conveyor 33, and the movable scraper 38 is integrally connected to the first hopper 17 to scrape the concrete on the fixed conveyor 33. 38, it is configured to be supplied to the valved chute 11 through the hopper 17.

On the other hand, a second hopper 32 for receiving concrete carried in from the outside onto a fixed conveyor 33 and a fixed conveyor 35 for conveying concrete discharged from the hopper 32 onto the fixed conveyor 33 are fixed to the turning device 30, respectively. There is.

Then, the swing arm 31 is rotated and the movable scraper 38 is moved so that the valved chute 11 faces the concrete placement position, and the concrete placed in the hopper 32 is conveyed onto the fixed conveyor 33 by the fixed conveyor 35 and fixed. conveyor 33
The chute 11 with valve is passed through the hopper 17.
supply to. The driving range extends within the turning radius of the turning arm 31.

A vibrator hanging arm 25 is fixed to the tip side of the chute with a valve as shown in FIG.
7 can be installed and the vibrator 27 can be activated during concrete pouring to reduce concrete compaction work.

Further, although the method of moving the movable scraper 38 in the concrete placing apparatus of the present invention has not been described above, this method is similar to the conventional method, for example, by moving each tip of a wire wound around a drum to a traveling conveyor. A method may be used in which the drums are separately fixed to one end and the other end of a frame body, etc., and moved by rotating a drum.

As explained above, according to the present invention, the range of concrete placement is expanded by using the valved chute 11, and since there is nothing to install on the reinforcing bars, there is no need to disturb or pollute the reinforcing bars. It disappears.

Furthermore, the work of the workers becomes easier, which leads to a reduction in labor, and also has the effect of lowering the casting cost.

Furthermore, although the above description has been made as if it were applied to a basement floor, it can be applied as is to a ground floor or to a layered construction method.

Furthermore, since the chute with a valve, which automatically opens due to the weight of accumulated concrete, is moved horizontally, it has the advantage of not requiring a valve control mechanism even though it is a mobile object. Despite such movement, concrete can be reliably conveyed to the upper end supply port without requiring any measures, which is extremely convenient in practice.

[Brief explanation of drawings]

FIGS. 1 a, b, c, and d are diagrams for explaining the configuration of a chute with a valve and its function; FIGS. 2 a and b are cross-sectional views and vertical sectional views of an example of a valve device of a chute with a valve; Figure 3 a, b
and c are a plan view, a front view, and an enlarged detailed view of the main parts of an embodiment of the apparatus of the present invention, and FIG. 4 is a partial view of the main parts. 1...Chute, 2...Valve device, 11...
Chute with valve, 17...hopper, 31...swivel arm, 32...hopper, 33...fixed conveyor,
35... Fixed conveyor, 38... Moving scraper.

Claims (1)

[Claims] 1 A chute made of a flexible material at the tip or a flexible material provided at a predetermined interval at a predetermined interval, provided below one half of the revolving arm of a revolving crane so as to be movable along the revolving arm; a first hopper connected to a valved chute comprising a valve device that is wound around the outer circumference of the chute and acts as a valve to close the chute when supplied with air pressure;
a fixed conveyor for conveying concrete arranged above the other half of the swing arm over almost the entire length of the swing arm; and a concrete conveyor connected to the first hopper and movable along the upper surface of the fixed conveyor; a movable scraper that supplies concrete to a first hopper, and a second conveyor that is fixed to a rotating arm and receives concrete brought in from outside to a fixed conveyor.
A concrete pouring device characterized by being equipped with a hopper.