JPH044410B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is provided to intersect with the traveling direction of the carrier of a cable crane in order to load concrete via a carrier onto a bucket suspended from the carrier of a cable crane. Concerning concrete conveyance lines.

<Prior Art> In general, concrete is transported in the construction of concrete dams using a combination of a bucket of a cable crane and a transport truck. FIG. 5 shows an outline of the system, in which the cable crane 50 fixes one end of the main rope 51 that has been passed across the valley to a fixed foundation 52, and stretches the other end between the fixed foundations 53 and 54 on the opposite bank. It is fixed to a trolley 56 that can move on the track rope 55 (see arrow A), and is moved by a running cable to the main rope 51 (see arrow B).
A bucket cart 58 which is raised and lowered (see arrow C) by a hoisting cable is also suspended from the carrier 57, and the concrete loaded in the bucket cart 58 is transported to an arbitrary pouring site.

The concrete conveyance line 60 intersects with the main rope 51 of the cable crane 50 and is installed horizontally at a position higher than the planned dam top of one side of the dam 59.
Conventionally, a landing plate 63 is formed by excavating a running path 62 heading toward a concrete plant 61 and a valley side along this running path 62 by approximately the height of the bucket 58.
(See Fig. 6), a transport cart 65 that reciprocates on rails 64 of a running path 62 carries concrete from the concrete plant 61, and a bucket 58 that returns to the landing plate 63 receives the concrete from above. It is starting to be loaded with. Recently, the landing position of the bucket 58 is calculated in advance from the position of the main rope 51, and the transport trolley 65 is moved close to the landing position.
A self-driving concrete transport line has been proposed in which the line automatically runs and stops, runs again after the bucket reaches the floor, and then stops when the bucket is detected (Special Publication No. 43817/1983).

<Problems to be Solved by the Invention> However, even in the above-mentioned self-driving concrete conveyance line, the running path 62 and the bucket landing plate 6
Since there is a step 66 as described above between 3 and 3 as in the conventional case, various inconveniences occur. That is, when constructing a dam, it is necessary to excavate a long distance along the running road 62 to create a level difference, and to pour concrete into the floor and walls. However, since it is necessary to backfill the step 66, there is a disadvantage that the construction cost increases. In addition, the bucket 58 suspended from the manually operated cable crane 50 often shakes while descending when landing on the floor, but there is no wall to protect the transport cart 65 on the running path 62 from the bucket 58. Therefore, in order to prevent a collision, the transport cart 65 has to be temporarily stopped in front of the scheduled landing position of the bucket as described above, and there is a drawback that the concrete loading time becomes long despite the automatic operation type. Furthermore, if the planned top of the dam is higher than the landing plate 63 due to location conditions, etc., there is also the drawback that concrete cannot be poured at the bucket landing position.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to prevent collisions of transport carts even if there is no level difference between the travel path and the landing platform, thereby reducing construction costs and reducing the expected landing position of the bucket. To provide a concrete transport line capable of shortening concrete loading time by preventing a bucket from colliding with a transport cart even if the transport cart is previously stopped next to it.

<Means for Solving the Problems> In order to achieve the above object, the concrete conveyance line of the present invention is designed to provide a concrete transport line for a traveling path of a transport vehicle heading for a concrete plant and a bucket for a cable crane that moves across this traveling path. A landing plate provided along the running path is formed on the same horizontal plane, and a collision prevention device is provided between the running path and the landing plate over an area where the bucket can move along the running path. It is characterized by having a fence erected.

<Function> When constructing a concrete conveyance line, there is no need to excavate the landing plate lower than the running path. Furthermore, after construction, the collision prevention fence prevents collisions between the bucket and the transport vehicle, so the transport vehicle can be stopped in advance at the position where the bucket is expected to land.

<Example> Hereinafter, the present invention will be explained in detail with reference to illustrated examples.

Figure 1 is a front view of the concrete conveyance line.
1 is a running path formed horizontally along a valley in a direction perpendicular to the plane of the paper toward a concrete plant (not shown); 3 is a transport vehicle running on rails 2 laid on this running path 1; 4 is the above-mentioned vehicle on the valley side. A landing board 5 formed on the same horizontal plane along the running path 1 is suspended by a hanging wire 6 from a carrier (not shown) of a cable crane moving across the valley, and the landing board 5 is
The bucket cart 7 on which concrete is loaded from the transport truck 3 is a collision prevention fence erected over the area where the bucket cart 5 can move between the traveling path 1 and the landing platform 4.

As shown in FIGS. 1 and 2, the transport vehicle 3 is
A motor 10 has wheels 9, 9 rotatably attached to the lower surface of a vehicle body 8, and one wheel 9 fixed to the vehicle body 8.
At the same time, a support 12 is mounted on the upper surface of the vehicle body 8 on the collision prevention fence 7 side.
12 is erected, and at the upper end of these supports 12, 12,
The box-shaped concrete storage tank 13 has a wide trapezoidal opening at the top (see Figure 3) and a narrow bottom.
This concrete storage tank 1 is rotatably connected via brackets 14 fixed to the sides.
3 is supported by a support stand 15 provided on the opposite side of the support column 12 on the upper surface of the vehicle body. Then, the rods 17, 17 of the hydraulic cylinders 16, 16, whose base ends are pivotally connected to the upper surface of the vehicle body between the support column 12 and the support base 15, are attached to the pin 18 at the center of the side of the concrete storage tank 13.
18, and by the protrusion of this rod 17, the concrete storage tank 13 is rotated in the direction of arrow X to the position shown by the two-dot chain line.
In addition, the upper front end of the concrete storage tank 13,
Cushioning materials 19, 20, 21 made of rubber or the like are attached to the upper surface of the support stand 15 and the front and rear end surfaces of the vehicle body 8, respectively, and a vibration vibrator 22 for vibrating the concrete in the tank is attached to the lower side of the concrete storage tank. ing. The above pillar 12,1
An air cylinder 23 is provided on the upper surface of the vehicle body between the two, and the tip of the rod 24 protrudes through the collision prevention fence 7, and connects to a receiver tank 37 for air for opening and closing the gate of the bucket 5. An air cylinder 23 is provided with a check valve. Mouth 3
8, and compressed air is supplied to the tip of the rod 24 from an electric air compressor 25 provided within the support base 15 via a hose 26. In addition, at the center of the horizontal member 27 passed between the upper parts of the pillars 12, 12, a reflecting mirror 42 attached to the center of the horizontal member 41 passed to the hanging fittings 40 on both sides of the bucket bag 5 is placed. 1)) The optical sensor 28 is fixed. Furthermore, a cable 29 consisting of a control signal line and a power line for sending a signal indicating the planned landing position of the bucket is wound around the upper surface of the concrete plant side end of the vehicle body 8, and is driven to rotate as the transport trolley 3 travels. While the cable reel 30 is mounted on the shaft, the motor 10, the hydraulic cylinder 16, the air cylinder 23, the electric air compressor 25, the optical sensor 27, and the cable reel 3 are mounted on the upper surface of the other end based on the above control signals.
A control panel 31 for controlling 0 is installed upright.

The bucket 5 houses a funnel-shaped container 33 with an open upper end in a cylindrical holding frame 32, and a gate 34 attached to the lower end of the funnel-shaped container 33 so as to be openable and closable is opened and closed by an air cylinder 35. The air cylinder 35 is driven by compressed air supplied and discharged from the receiver tank 37 via the hose 39 based on the gate opening/closing signal received by the wireless receiver 36.

As shown in FIG. 4, the collision prevention fence 7 is
Foundation concrete 43 between running path 1 and landing plate 4
Supports 44 made of H-shaped steel with their lower ends embedded in the walls and erected at predetermined intervals are connected to each other by four rows of horizontal bars 45 made of the same H-shaped steel, and the surface of each horizontal bar 45 on the landing board side is coated with rubber, etc. The height of the fence is approximately equal to the height of the support column 12 of the carriage 3 running on the rail 2.

The movement of the concrete conveying line with the above configuration will be described next.

After returning to the concrete plant (see 61 in Figure 5) and loading concrete into the concrete storage tank 13, the transport trolley 3 travels on the rail 2 of the running path 1 towards the cable crane (see 50 in Figure 5). The rotation speed of the wheels 9 is converted into pulses and output as a truck position signal to a transportation control device (not shown) in the concrete plant via a cable 29. On the other hand, the cable crane bucket 5 loaded with concrete and traveling to the pouring site opens the gate 34 and discharges the concrete in response to the gate open signal received by the radio receiver 36, and then releases the concrete in response to the gate close signal. Close the gate and place the landing board 4.
Heading towards and coming back. At this time, a bucket position detector (not shown) installed at a predetermined position on the bucket travel path detects the cable crane main rope (see 51 in Figure 5) position, carrier (57) position, and bucket height. Then, a bucket position signal is output to a winch automatic control device (not shown) and the transport control device. As a result, the automatic winch control device automatically controls the carrier's traveling winch and the bucket's hoisting winch in a predetermined space before landing, gradually decelerating and adjusting the height of the bucket, and smoothly landing on the landing board 4. Let it implant. At this time, even if the bucket cart 5 shakes, the bucket cart 5 will not hit the transport vehicle 3 because of the collision prevention fence 7. On the other hand, the transportation control device calculates the bucket landing position based on the truck position signal and the bucket position signal, and controls the travel of the transportation truck 3 so that the transportation truck gradually decelerates and stops at this position.

In this way, when the transport cart 3 approaches the bucket 5 on the landing plate 4, as shown by the dashed line in FIG.
A light sensor 28 of the transport cart 3 detects the light reflected by the reflecting mirror 42 of the bucket cart 5, and the transport cart 3 is accurately positioned on the bucket cart 5 and stopped. Subsequently, the rods 17, 17 of the hydraulic cylinders 16, 16 are protruded by a control signal from the conveyance control device via the cable 29, and the concrete storage tank 13 is rotated in the direction of the arrow X in FIG. The concrete in the tank is dumped into the bucket 5 from above. In addition, the air cylinder 23
The rod 24 protrudes, and its tip is attached to the bucket 5.
At the same time, the electric air compressor 25 is driven and the compressed air is supplied to the hose 2.
6, the receiver tank 37 is filled. In addition, an amount of compressed air that can open and close the gate 34 several times is supplied with one filling.

When concrete has been poured into the bucket 5, the transport vehicle 3 retracts the rod 17 of the hydraulic cylinder 16 to return the concrete storage tank 13 to its original position under automatic control based on the control signal described above, and returns the concrete storage tank 13 to its original position. After stopping the air cylinder 25 and immersing the rod 24 of the air cylinder 23, the train headed towards the concrete plant again on the rail 2, while
The bucket 5 is moved to the next pouring site by manual operation of the cable crane.

In the above embodiment, the automatic winch control device automatically controls the travel of the bucket cart 5 in a predetermined space before landing based on the bucket cart position signal from the bucket cart position detector, and also uses the bucket cart position signal and the truck position signal to automatically control the travel of the bucket cart 5 in a predetermined space before landing. Based on this, the transport control device smoothly runs the transport cart 3 to the scheduled landing position of the bucket, so there is no temporary stop of the cart or mistakes in landing the bucket, and the efficiency of concrete loading is further improved. In addition, transport trolley 3
The concrete storage tank 13 has a cylinder 16
Side dumping is possible with a single movement, the mechanism is simplified as there is no need for a discharge gate, there is no trouble opening or closing the gate, and the product can be loaded quickly and reliably. Furthermore, since the running path 1 and the landing plate 4 are on the same plane,
Compressed air for opening and closing the gate is supplied to the bucket 5 by the air cylinder 23 and electric compressor 25 of the transport truck 3, and the wireless receiver 3 also opens and closes the gate 34.
6, so compressed air is supplied by connecting an air hose to the receiver tank 37 at the pouring site, and the gate 3 is operated by hand by moving the handle.
There is no need to open or close 4, which greatly eliminates dangerous work. Further, the optical sensor 28 and the reflecting mirror 42 make the positioning of the transport cart 3 and the bucket 5 more accurate.

<Effects of the Invention> As is clear from the above explanation, the concrete conveyance line of the present invention has the above-mentioned running path for the running path of the transport vehicle heading to the concrete plant and the bucket of the cable crane that moves across this running path. A landing board provided along the running path is formed on the same horizontal plane, and a collision prevention fence is erected between the running path and the landing board over an area where the bucket can move along the running path. This eliminates the need to create a level difference between the travel path and the landing plate, reducing construction costs for excavating and backfilling the level difference, and also prevents collisions between the bucket and the transport trolley. It is possible to run directly to the bucket landing position without stopping, reducing concrete loading time.
It has remarkable effects, such as improving loading efficiency.

[Brief explanation of drawings]

Fig. 1 is a front view showing one embodiment of the concrete conveying line of the present invention, Fig. 2 is a view taken from the - arrow in Fig. 1, Fig. 3 is a view taken from the - arrow in Fig. 2, and Fig. 4 is a view taken from the - arrow in Fig. 2. 1, FIG. 5 is a diagram showing an outline of a concrete placing method in dam construction, and FIG. 6 is a longitudinal cross-sectional view of a conventional concrete conveying line. 1... Running path, 2... Rail, 3... Transport trolley, 4... Landing board, 5... Bucket, 7... Collision prevention fence, 12... Support column, 13... Concrete storage tank, 16... ... Hydraulic cylinder, 50 ... Cable crane, 51 ... Main rope, 57 ... Carrier, 58 ... Bucket, 60 ... Concrete transport line, 61 ... Concrete plant.

Claims (1)

[Scope of Claims] 1. A concrete transport line that is provided to intersect with the traveling direction of the carrier in order to load concrete via a transport vehicle onto a bucket suspended from the carrier of a cable crane, which is directed toward a concrete plant. A running path for the transport vehicle and a landing board for the bucket cart provided along the running path are formed on substantially the same horizontal plane, and the bucket cart runs between the running path and the landing board. A concrete transportation line characterized by having a collision prevention fence erected over an area where movement is possible along the road.