JP2985674B2 - Automatic concrete casting method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for automatically placing concrete, and more particularly to a method for automatically placing concrete in a large area.

[0002]

2. Description of the Related Art As is well known, concrete is poured by a concrete supply pipe which is drawn into a casting area and a level is used to level the concrete surface. Inspect and make corrections.

[0003] For example, Japanese Patent Application Laid-Open No. H05-25938 (E)
04G 21/04), there has been proposed an automated technique. In other words, a concrete supply pipe is erected above the area to cover the concrete placing area, concrete is discharged from a large number of discharge ports formed in this concrete supply pipe, and the height of the concrete placed at each discharge port is reduced. The ejection amount is controlled by detecting whether or not it is at a predetermined value, and the casting height is automatically made uniform.

[0004]

However, in the above-described automated casting technique, a sensor for detecting whether or not the height of the poured concrete is at a predetermined value is provided near each discharge port. Therefore, there has been a problem that the sensor is exposed to the splash of concrete discharged from the discharge port. This causes a problem that the function of the sensor deteriorates due to dirt, the detection value becomes inaccurate, and the sensor may be damaged.

The present invention has been made in view of the above circumstances, and an object of the present invention is to prevent contamination of a sensor for detecting the height of cast concrete, and to automate concrete cast in a large area. It is an object of the present invention to provide a method for automatically placing concrete.

[0006]

Means for Solving the Problems In order to achieve the above object, the present invention is to arrange a concrete supply pipe on a concrete casting area, and arrange a number of discharge ports provided with gate valves in the concrete supply pipe. An ultrasonic sensor for detecting the height of the poured concrete is disposed substantially at the center between the discharge ports and above the discharge ports, and a detection value of the ultrasonic sensor group is provided. The gate valve group is controlled to open and close according to

When the concrete is poured, the ultrasonic sensor is horizontally moved in a range between the discharge ports, and the height of the concrete in the moving range is detected.

[0008]

In the operation of the present invention, when concrete is poured, the discharge flow rate from the discharge port on the upstream side of the concrete supply pipe is larger than that of the discharge port on the downstream side. The casting height first reaches a predetermined value, which is detected by the sensor, so that the upstream gate valve is first closed. As a result, the concrete is sequentially and intensively supplied to the discharge port on the downstream side, that is, the portion where the casting height is not sufficient, and the gate valve is sequentially closed toward the downstream side. As a result, the concrete placement height is leveled and a flat concrete surface can be obtained.

The sensor for detecting the height of the cast concrete is disposed substantially at the center between the discharge ports and at a position higher than the discharge ports. There is no danger of taking a bath.

In addition, when placing concrete, the sensor is moved horizontally in the range between the discharge ports and the height of the poured concrete is detected in the moving range, so that the flow gradient of the poured concrete can be grasped. Not only can it be done, but it can also check that the sensor is operating properly. Then, it is possible to grasp the speed of the change of the flow gradient with respect to the discharge time, and it is possible to appropriately control the supply speed of the concrete in accordance with this.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a plan view showing a preferred embodiment of the automatic concrete placing method according to the present invention.
The figure is a floor portion of a reinforced concrete building and shows a concrete casting area. FIG. 2 is a side view of the concrete casting area shown in FIG.

[0012] The present invention is to automatically perform concrete casting in a large area, and therefore, first,
Pouring area 1 to be the floor of a reinforced concrete building
Are placed on top of the concrete supply pipes 2.

The concrete supply pipes 2 are provided with a large number of discharge ports 4 provided with gate valves 3 in a predetermined arrangement. The other ends of the concrete supply pipes 2 are connected to a concrete supply device 5 so that the supplied concrete 6 is delivered and discharged.

Further, sensors 7 for detecting the height of the cast concrete 6 are disposed at a position substantially at the center between the discharge ports 4 and above the discharge ports 4. . The sensors 7 are ultrasonic sensors in the present embodiment, transmit ultrasonic waves and receive reflected waves, and are connected to a control device 8 for opening and closing the gate valves 3. is there. Each sensor 7 is supported by a driving device (not shown), and can be moved horizontally in a range between the discharge ports 4.

The control device 8 is a so-called personal computer, which reads the flow rate of the concrete from the concrete supply device 5, and can display and manage the total amount of the concrete poured. 7 ... gate valve 3 according to the detected value of the group
... The group is controlled to open and close. Concrete 6
At the beginning, the discharge flow rate from the discharge port 4 on the upstream side of the concrete supply pipe 2 near the concrete supply device 5 at the beginning is larger than that of the discharge port 4 on the downstream side, and the concrete 6 The casting height reaches the predetermined value first,
Since this is detected by the sensor 7, the gate valve 3 on the upstream side is first closed. As a result, the concrete 6 is sequentially and intensively supplied to the discharge port 4 on the downstream side, that is, the portion where the casting height is not sufficient, and the gate valve 3 is sequentially closed toward the downstream side. As a result, the casting height of the concrete 6 is leveled, and a flat concrete surface can be obtained.

When the concrete 6 is poured, the sensors 7 are horizontally moved in a range between the discharge ports 4 and the height of the concrete 6 is detected in the moving range. As a result, the flow gradient of the cast concrete 6 can be grasped, and it is also checked that the sensor 7 is operating normally. For this reason, it is easy to find a trouble in the state of placing the concrete 6, and it is possible to prevent a mistake in placing. Then, it is possible to grasp the speed of the flow gradient change with respect to the discharge time, and accordingly, it is possible to appropriately control the supply speed of the concrete 6.

As described above, the sensors 7 for detecting the height of the cast concrete 6 are disposed at substantially the center between the discharge ports 4 and above the discharge ports 4. Therefore, there is no danger of splashing the concrete 6 discharged from the discharge ports 4. Accordingly, it is possible to prevent the sensors 7 from becoming dirty or damaged. In addition, since the sensors 7 are arranged in the entire casting area 1, no blind spots are generated. Further, since each part is controlled by the control device 8 as described above, centralized management is performed, and concrete is cast in a wide area. Can be easily performed by automation.

[0018]

As described above in detail, according to the method for automatically placing concrete according to the present invention, when placing concrete is started, the placement height is firstly determined upstream of the concrete supply pipe. As the value reaches the value, the gate valve on the upstream side is first closed, and concrete is sequentially and intensively supplied to the discharge port on the downstream side, that is, the portion where the casting height is not sufficient, and the gate valve is sequentially turned to the downstream side. It will be closed. As a result, the concrete placement height is leveled and a flat concrete surface can be obtained.

Since the sensor for detecting the height of the cast concrete is disposed substantially at the center between the discharge ports and above the discharge ports, the concrete droplets discharged from the discharge ports are disposed. There is no danger of taking a bath. Therefore, it is possible to prevent the sensor from being soiled or damaged. In addition, since sensors are arranged in the entire casting area, there is no blind spot, and since the gate valve group is controlled to open and close according to the detection values of these sensor groups, concrete casting in a wide area is automated. Can be performed more easily.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a side view of FIG.

[Explanation of symbols]

 1 area 2 concrete supply pipe 3 gate valve 4 discharge port 6 concrete 7 sensor

Claims (2)

(57) [Claims] 1. A concrete supply pipe is arranged on a concrete casting area, and a plurality of discharge ports provided with gate valves are disposed in the concrete supply pipe, substantially at the center between the discharge ports and the discharge ports. An ultrasonic sensor for detecting the height of the poured concrete is disposed at a position higher than the above, and the opening and closing of the gate valve group is controlled according to the detection value of the ultrasonic sensor group. Automatic concrete placement method. 2. The concrete sensor according to claim 1, wherein said ultrasonic sensor is horizontally moved in a range between said discharge ports when concrete is poured, and the height of said concrete in said moving range is detected. Item 6. The method for automatically placing concrete according to Item 1.