JPH0144845B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for transporting concrete in dam construction, which enables efficient and safe transport of concrete during dam construction.

Conventional methods for transporting concrete in dam construction include transporting concrete using a fixed jib crane a and a concrete bucket receiving cart c pulled by a mobile vehicle b, as shown in Figure 1;
As shown in FIGS. 2 and 3, there is a method of transporting using a cable crane f and a transfer car g.

That is, in the method shown in Fig. 1, while a jib crane a suspends a concrete bucket containing concrete and supplies concrete to a concrete placement site, a concrete bucket placed on a concrete bucket receiving cart c is suspended. Batcher plant (concrete mixing equipment)
After that, the trolley c is towed by mobile vehicle b and transported to the required position of the crane section. When the concrete bucket receiving trolley c reaches the required position of the crane section, crane a is used to collect the empty concrete. A bucket e is placed on a concrete bucket receiving cart c, a concrete bucket d containing concrete is lifted up, and the bucket d is transported to a concrete pouring site.

However, in this so-called bucket lifting method, two people are required for the bucket lifting work.
One worker was required to act as a signal man, and it took a lot of time to rehang the bucket.

In addition, air for opening and closing the gate of the concrete bucket must be supplied either at the bucket plant or at the concrete pouring site, which is inefficient.

On the other hand, in the method shown in Fig. 2, concrete is received at a batcher plant into a concrete hopper h attached to a transfer car g, the concrete is moved to a cable crane f, the hopper h is opened, and the concrete is hoisted to a cable crane f. concrete is poured into the concrete bucket i placed on the stage i, and then the concrete bucket j is transported to the concrete pouring site by the cable crane f.

This method is superior to the method shown in Fig. 1 because there is no need to change the suspension of the bucket, but since the bucket is placed over the entire length of the travel path of the transfer car g, it is necessary to provide the stage i along the entire length of the travel path. It required a lot of equipment costs. Also in this case, it was necessary to supply air for opening and closing the bucket gate at the stage i section or at the concrete pouring site, which did not improve efficiency.

The present invention has been made with the aim of eliminating the above-mentioned drawbacks of the conventional means, and involves positioning a concrete bucket receiving cart equipped with a turntable at a required position on the bunker line, and attaching a bucket hanging fixture to a crane hook. A concrete bucket suspended via a wire rope is placed in a predetermined position on the turntable, air for opening and closing the gate is automatically supplied to the concrete bucket, and then the turntable is rotated together with the concrete bucket. Then, position the wire rope for the bucket hanging bracket attached to the concrete bucket in a position where it will not interfere with the hopper and gate of the transfer car, and when the transfer car that has received concrete comes close to the concrete bucket receiving truck, This method is characterized by stopping the arker, pouring concrete into a concrete bucket, and then lifting the concrete bucket with a crane and transporting it to a desired location.

Embodiments of the present invention will be described below with reference to the drawings.

Figures 4 to 8 show an embodiment of the present invention. In Figures 4 and 5, 1 is a dam for pouring concrete, 2 is a fixed jib crane installed at a required position, and 3 is a concrete 4 is a bunker line (railway) laid from the batcher plant 3 to the required position; 5 is a transfer station that stores and transports concrete from the batcher plant 3 to the required position on the bunker line 4; The anchor 6 is a concrete bucket receiving truck that can move on the bunker line and receive concrete from the transfer anchor 5.

The overall structure of the transfer car 5 is shown in FIG. A lifter 1 that can be raised and lowered by the expansion and contraction movement of the fluid pressure cylinder 10 between
1, a concrete hopper 12 is pivotally attached to the tip of the hopper support 9 by a pin 13, and a fluid pressure cylinder 14 is installed between the hopper support 9 and the concrete hopper 12, so that the concrete hopper 12 is Concrete hopper 1 is constructed so that it can be tilted forward and downward around pin 13.
A hopper gate 16 that opens and closes by the operation of a fluid pressure cylinder 15 is disposed at the tip of 2, and a fluid pressure pump unit 17 and a driver's cab 18 are mounted on the hopper support base 9.
Although not shown, parking brakes are attached to the wheels so that the transfer car 5 can be stopped at a predetermined position.

The overall structure of the concrete bucket receiving truck 6 is shown in FIGS. 6 and 7, in which a drive engine 19 that can be driven by radio control from the driver's cab of the jib crane 2 is connected to the traveling truck 20.
The driving engine 19 is placed on top of the vehicle so that the traveling vehicle 20 can be driven by the driving engine 19.
A turntable 21 that can be rotated by a drive engine 19 is disposed above the turntable 21, and a concrete bucket guiding guide 22 having a tapered inner surface is disposed on the turntable 21 to position the concrete bucket 23. To make it easier to
The concrete bucket 23 has an oval cross-sectional shape, and the concrete bucket guiding guide 22 disposed on the turntable 21 also has an oval cross-sectional shape, and the turntable 21 is shaped like a rainbow funnel at a desired position. A concrete bucket guiding receiver 24 is provided, a conical pawl 25 protruding from the lower surface of the concrete bucket 23 can be fitted into the guiding receiver 24, and the drive engine 19 is mounted on the traveling truck 20. An air compressor 26 that is driven by
Lower automatic air supply coupling 28 located at the bottom of 0
Connect to.

An air receiver 29 and a gate are provided at the lower part of the concrete bucket 23, and an upper automatic air supply coupling 30 is provided at a required position below the concrete bucket 23, and the concrete bucket 23 is connected to the turntable 21 of the concrete bucket receiving cart 6. By placing it in the required position,
The upper and lower automatic air supply couplers 30 and 28 communicate with each other so that air from the air compressor 26 is supplied to the air receiver 29.
The details of the upper and lower automatic air supply couplings 30, 28 are described in detail in the specification of Japanese Utility Model Application No. 151362/1985 filed by the applicant on October 31, 1982, and therefore the explanation thereof will be omitted.

A wire rope 32 that can be wound up and down is suspended from the tip of the jib 31 of the jib crane 2, and a hook 33 is attached to the lower end of the wire rope 32 and is rotatable in the horizontal direction by a crosshead (not shown).
and attach the bucket hanging bracket 34 to the hook 33.
are attached, and wire ropes 35 for bucket hanging fittings attached to both ends of the bucket hanging fittings 34 are fixed to both sides of the upper end of the concrete bucket hanging fitting 23 in the longitudinal direction.

Next, the operation of the present invention will be explained.

When pouring concrete for a dam, the concrete bucket receiving cart 6 is remotely controlled from the driver's seat of the jib crane 2 to a predetermined position on the bunker line 4 (for example, position X in Fig. 4) according to the concrete pouring position. ), and with the concrete hopper 12 horizontal and the lifter 11 lowered, the transfer car 5 is positioned at the required position of the batcher plant 3, and concrete is supplied from the batcher plant 3 into the concrete hopper 12. The transfer car 5 is driven along the bunker line 4 toward the concrete bucket receiving truck 6 by operation in the driver's cab 18. When the transfer car is running, the lifter 11 is lowered and the concrete hopper 12 is kept at a low position in order to maintain running stability.

Meanwhile, during the above-mentioned work, the jib 31 is rotated while the concrete bucket 23 with concrete poured at the concrete casting site is suspended from the jib crane 2, and the wire rope 32 is let out.
The concrete bucket 23 is then placed on the turntable 21 of the concrete bucket receiving cart 6. When the empty concrete bucket 23 is placed on the turntable 21, the concrete bucket 23 is guided by the concrete bucket guiding guide 22, and the conical pawl 25 attached to the lower surface of the concrete bucket 23 is placed on the turntable. Since the funnel-shaped concrete bucket guiding receiver 24 provided at 21 is fitted, the concrete bucket 23 is accurately positioned. or,
Since the concrete bucket 23 has a horizontally rotatable crosshead on the hook 33, it rotates during work, and therefore the longitudinal position of the concrete bucket 23 and the guide 2 for guiding the concrete bucket can be adjusted.
The two longitudinal directions are not necessarily the same. In this case, when placing the concrete bucket 23 on the turntable 21, the jib crane 2
The turntable 21 is rotated by remote control from the operator's cab to align the longitudinal direction of the concrete bucket 23 with the longitudinal direction of the concrete bucket guiding guide 22 on the turntable 21, and then the concrete bucket 23 is rotated. Place it on turntable 21.

Concrete bucket 23 is turntable 2
1, the upper and lower automatic air supply couplings 30 and 28 are connected, each valve is automatically opened, and air is supplied from the air compressor 26 to the concrete bucket. G23
The air is sent to the air receiver 29 and stored there.

Furthermore, when the concrete bucket 23 is placed on the turntable 21, if the longitudinal direction of the concrete bucket 23 is not located in the direction perpendicular to the bunker line 4 when viewed from above, the bucket hanging fitting 34 direction is deviated from the normal direction, and the bucket hanging fitting 34 is not oriented at right angles to the transfer car 5. In this case, the concrete hopper 12 of the transfer car 5 will interfere with the wire rope 35 for the bucket hanging fixture, which will hinder the work. Therefore, from the operator's cab of jib crane 2, turntable 2 was
The position of the bucket hanger 34 is corrected by rotating everything from below the hook 33, which is horizontally rotatable with a crosshead. At this time, since the crosshead rotates, the wire rope 32 will not be twisted.

When the bucket lifting bracket 34 and the transfer car 5 are in the correct position and the transfer car 5 travels several meters before the concrete bucket receiving cart 6 and stops, the fluid pressure cylinder 10 is activated to lift the lifter 1.
1, the concrete hopper 12 is raised together with the hopper support 9, and then the transfer car 5 travels to a predetermined position in front of the concrete bucket receiving cart 6, and when it stops, the parking brake is activated and the transfer car 5 is moved. Then, the hydraulic cylinder 14 is actuated to tilt the concrete hopper 12 about the pin 13, the gate 16 is opened by the hydraulic cylinder 15, and the concrete hopper 12 is
The concrete inside is put into the concrete bucket 23. In this way, transfer car 5
Concrete bucket 2 placed on the same level as
3, concrete can be poured into the container, so there is no need to change the suspension of the bucket as in the conventional method, and there is no need to provide a lower step for placing the bucket.

While concrete is being poured into the concrete bucket 23, air is automatically supplied from the air compressor 26 to the air receiver 29 of the concrete bucket 23. When lifted by the jib crane 2, the valves in the upper and lower automatic air supply couplings 30 and 28 are automatically closed, the flow of air from the air compressor 26 is stopped, and the air in the air receiver 29 does not leak. .

The concrete bucket 23 loaded with concrete and lifted by the wire rope 32 of the jib crane 2 is transported to the concrete placement site by the rotation of the jib crane 2, and the concrete bucket 23 is lifted by the air stored in the air receiver 29 of the concrete bucket 23. gates will be opened and closed. The concrete bucket cart 23 is transported to the casting site by turning and hoisting and lowering the jib crane 2, and not by raising and lowering the jib 31, because raising and lowering generally takes time and tends to cause the load to shake significantly. It is.

In addition, when pouring concrete at the same point, the jib crane 2 only rotates while keeping the jib angle the same, and the bunker line 4 is
The concrete bucket 23 is lowered onto the concrete bucket receiving cart 6 which is stopped at a position intersecting the concrete bucket. In this case, once the concrete bucket cart 23 is set in the correct position with respect to the transfer car 5, there is no need to rotate the turntable 21 next time when pouring concrete at the same point. However, when the concrete bucket cart 6 moves from position X to position Y, the turntable 21 must be rotated again.

9 to 11 show another embodiment of the present invention, in which a cable crane 3 is used instead of a jib crane.
This example is completely the same as the previous example except that 6 is used.

In the figure, 37 is the fixed tower of the cable crane 36;
8 is the mobile tower, 39 is the main cable, 40 is the trolley, and 41 is the running path of the mobile tower 38. In the figure, the same symbols as those shown in Figures 4 to 8 indicate the same thing. . In this case, it is not necessary to provide a turntable for the concrete bucket receiving cart 6, but since the bunker wire 4 is often curved, it is better to provide one.

The running of the concrete bucket receiving cart 6 and the rotation of the turntable 21 can be carried out by radio control from the operator's cab of the cable crane 36, as in the case of a jib crane, or by radio control from the fixed tower 37 of the cable crane 36. The vertical position of the main cable 39 stretched over the main cable 38 may be detected, and the concrete bucket receiving cart 6 may be automatically controlled so as to come directly below it.

It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

Since the method and apparatus for conveying concrete in dam construction of the present invention have the above-described configuration,
Various excellent effects can be achieved as described below.

I) It is possible to reduce the number of 2 workers and 1 signal man needed for concrete bucket hoisting, which were required in the conventional so-called bucket hoisting method, contributing to labor savings.

) When supplying air to the concrete bucket, there is no need to connect the air supply pipes, so labor can be saved.

) The equipment becomes simpler because there is no need for a stage for placing concrete buckets, which was necessary in the conventional transfer car method.

) There is no need to rehang the concrete bucket, and air can be automatically supplied to the bucket, improving work efficiency.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram of an example of a concrete conveyance system in conventional dam construction, Figure 2 is an explanatory diagram of another example of a concrete conveyance system in conventional dam construction, and Figure 3 is viewed from the - direction arrow in Figure 2. Figure 4 is a plan view of an embodiment of the concrete conveying method and apparatus for dam construction of the present invention, Figure 5 is a view taken along the V-V direction of Figure 4, and Figure 6 is used in the present invention. FIG. 7 is an explanatory diagram of the case where concrete is poured from the hopper of the transfer car to the concrete bucket of the concrete bucket receiving vehicle in the present invention, and FIG. 8 is a perspective view of the concrete bucket receiving vehicle shown in FIG. 7. 9 is a plan view of another embodiment of the method and apparatus for conveying concrete in dam construction according to the present invention;
0 is a view taken along the line X--X in FIG. 9, and FIG. 11 is a perspective view of what is shown in FIGS. 9 and 10 as viewed diagonally from above. In the figure, 1 is a dam, 2 is a fixed jib crane, 3 is a butcher plant, 4 is a bunker line, 5 is a transfer car, 6 is a concrete support truck, 1
2 is a concrete hopper, 16 is a hopper gate, 21 is a turntable, 28 is a lower automatic air supply coupling, 29 is an air receiver, 30 is an upper automatic air supply coupling, 34 is a bucket hanging bracket, and 35 is a wire rope for the bucket hanging bracket. ,3
6 indicates a cable crane.

Claims (1)

[Scope of Claims] 1. A concrete bucket receiving cart equipped with a turntable is positioned at a required position on the bunker line, and the concrete bucket, which is suspended from a crane hook via a wire rope for a bucket hanging fixture, is moved to the turn table. Place the table in place,
Air for opening and closing the gate is automatically supplied to the concrete bucket, and then the turntable is rotated together with the concrete bucket, and the wire rope for the bucket hanging bracket attached to the concrete bucket is connected to the gate of the hopper of the transfer car. When the transfer car that has been supplied with concrete comes close to the concrete bucket receiving truck, the transfer car is stopped, concrete is poured into the concrete bucket, and the concrete bucket is then moved with a crane. A method of transporting concrete in dam construction, which is characterized by lifting and transporting it to a required location. 2 A crane for suspending and transporting the concrete bucket is installed at the required position, and a transfer car with a concrete hopper that can be raised and lowered and tilted, and a concrete bucket equipped with a horizontally rotatable turntable are installed on the bunker line laid at the required position. In the dam construction, a turntable and a turntable are movably disposed, and an automatic air supply coupling for connecting the concrete bucket and an air supply source is provided between the turntable and the concrete bucket. Concrete conveyance equipment.