JPH08318517A - Method and apparatus for controlling input of concrete in mold - Google Patents

Abstract

PURPOSE: To automate the enhancement of the quality of a concrete product manufactured by placing the concrete in a mold and the placing of the concrete. CONSTITUTION: A concrete supply unit 5 for placing concrete in a mold 2 is provided in a concrete placing station, a placing speed regulating mechanism 10 having a rotary feeder 8 and an inverter motor 9 is provided in the supply cylinder 7 of a supply hopper 6, four load cells 13 are provided at a mold support base plate 3, and a level measuring unit 11 for measuring the liquid level of the concrete in the mold 2 is provided. Placing speed characteristics, other table and map are set in response to the volume and structure of the mold for a plurality of types of molds in a control unit for controlling the motor 9, the type of the mold is decided from the own weight of the mold 2, and the motor 9 is so controlled as to place at the placing speed characteristics corresponding to the mold. The correction is controlled by using the detected placing weight and the placing end timing is decided according to the detected liquid level.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the amount of concrete input to a mold and an apparatus for controlling the amount of the concrete, and in particular, it controls the injection speed so as to have a preset speed characteristic in accordance with the capacity and structure of the form. It relates to a technique for controlling the quantity.

[0002]

2. Description of the Related Art Conventionally, in a line for manufacturing a secondary concrete product such as a box culvert, concrete is put into a formwork on a dolly and vibration is applied to the formwork to mass-produce the concrete secondary product. However, when using hyper-performance concrete, high-fluidity concrete, or super-fluidity concrete having high fluidity, the surface of the concrete becomes flat without applying vibration. When concrete is put into a formwork, it is necessary to prevent the separation of concrete material and the inclusion of air to produce high-quality products, but in the past, monitoring the amount of concrete put into the formwork,
The reality is that the adjustment of the feeding speed depends on human labor. In addition, small secondary concrete products usually have a structure without reinforcing bars, but secondary secondary concrete products with a weight of ton order have a normal reinforced concrete structure. Throw in.

In Japanese Patent Laid-Open No. 5-293815, in order to produce a secondary concrete product by injecting hyper-formance concrete into a formwork, an injection port is provided near the bottom of the formwork and the injection port is provided. By connecting the concrete storage container via the joint, flexible tube, opening and closing cock, and pressure pump, driving the pressure pump by opening the cock and injecting a predetermined amount of concrete from the injection port, without mixing air Described is a technique for injecting concrete into a formwork in which the formwork is filled with concrete. However, this publication does not describe control of the concrete input amount or the input speed. Incidentally, Japanese Patent Application Laid-Open No. 5-293817 also describes a concrete pouring technique for pouring concrete from a pouring port in the vicinity of the bottom of the form by using a pressure of pressurized air instead of the pressure pump.

[0004]

If the feeding speed at which the concrete is poured into the mold is too high, excess air is likely to be mixed in, and the quality of the product deteriorates. Also,
If the feeding speed is too low, the concrete material is separated and the product quality is deteriorated. Therefore, in order to manufacture high quality products, it is necessary to inject concrete at an appropriate injection speed (unit: ton / Hr) according to the capacity and structure of the formwork. However, high-quality products cannot always be manufactured even if they are charged at a constant charging speed according to the capacity and structure of the formwork. Depending on the structure of the formwork, the cross-sectional area is not constant in the height direction, so it is possible to adjust the throwing speed so that the throwing speed characteristics are set appropriately according to the cross-sectional area at each level from the bottom to the top. desirable.

In the past, an operator had to monitor the input amount and adjust the input speed. However, since the volume and structure of the formwork are not constant, it is difficult to automate concrete injection into the formwork, and product quality is improved. There are problems that it is difficult to raise it sufficiently and that the manufacturing cost becomes high. Here, it is possible to control the input amount and the input speed by measuring the level of the input concrete, but when placing the reinforcing bar assembly in the formwork, the shape accuracy of the reinforcing bar assembly is low and Since interference occurs, it is difficult to detect the level accurately. In addition, since the specific gravity of concrete may vary due to variations in various conditions such as the amount of water when water is added to concrete raw material to make ready-mixed concrete, the concrete is automatically filled into the formwork without excess or deficiency. It's not easy to do.

[0006] The concrete pouring technique of the above publication is excellent in that the air in the form can be discharged to the outside by the concrete poured into the form, but the form such as a box culvert having a "b" -shaped cross section. In the case of a formwork in which an inner formwork with a square-shaped cross section is set inside the outer formwork, if it is injected at an excessively high injection rate, air will flow to the lower surface of the bottom wall of the inner formwork. May remain and deteriorate in quality. Further, since there is no detection means or control means for controlling the concrete input amount and the input speed, concrete injection cannot be performed with the optimum input speed characteristics according to the capacity and structure of the formwork. . It is an object of the present invention to improve the quality of products by adding concrete at a setting speed characteristic that is preset according to the capacity and structure of the mold, and to enable automation of concrete injection.

[0007]

According to a first aspect of the present invention, there is provided a method for controlling a concrete input amount to a formwork, which is a method for controlling an input amount of concrete when the concrete is supplied from a concrete supply means to a formwork having an input port at an upper end thereof. In the above, the concrete feeding means is provided with a throwing speed adjusting means in advance, and while throwing concrete into the mold, the throwing speed adjusting means is provided so that the concrete can be poured with a preset speed characteristic according to the capacity and structure of the form. It is characterized by controlling.

The method for controlling the amount of concrete input to a mold according to claim 2 is a method for controlling the amount of concrete input from the concrete supply unit to a form having an input port at the upper end, wherein the concrete supply unit is used. A charging speed adjusting means is provided in advance, while the concrete is charged into the mold, the weight measured by the weight measuring means is measured, and the charging speed is set according to the capacity and the structure of the mold so that the charging speed is set. It is characterized in that the charging speed adjusting means is controlled on the basis of the charged weight.

According to a third aspect of the present invention, there is provided a method for controlling the amount of concrete input into a formwork, wherein in the invention of the first or second aspect, a level measuring means is used to measure the level of concrete that has been input at least at the final stage of the concrete input into the formwork. It is characterized in that the end timing of concrete injection is determined based on the measured level.

A concrete feeding amount control device for a formwork according to a fourth aspect is a device for controlling a feeding amount when concrete is fed from a concrete feeding means to a formwork having an input port at an upper end thereof. Injecting speed adjusting means provided in, the weight measuring means for measuring the weight of the concrete that has been injected into the mold, the input speed characteristics of the concrete injection into the mold according to the capacity and structure of the mold It has a preset map and is provided with control means for controlling the charging speed adjusting means based on the measured weight received from the weight measuring means.

According to a fifth aspect of the present invention, there is provided a concrete amount control device for leveling concrete, the level measuring means for measuring the level of the concrete which has been put in at least at the final stage of the concrete feeding into the form. And a pouring end control means for deciding the end timing of concrete pouring based on the measurement level received from the level measuring means.

[0012]

According to the method for controlling concrete input into a mold according to claim 1, in order to control the input amount of concrete when the concrete is input from the concrete supplying means to the mold having an inlet at the upper end, concrete supplying means is provided. A charging speed adjusting means is provided in advance, and while the concrete is being charged into the mold, the charging speed adjusting means is controlled so that the concrete is charged with a charging speed characteristic preset according to the capacity and structure of the mold. Therefore, it is possible to reliably prevent mixing of air into concrete in the formwork, separation of concrete material, and the like, and it is possible to automate concrete injection.

According to a second aspect of the present invention, there is provided a method for controlling a concrete feeding amount into a formwork, wherein the concrete feeding means controls the feeding amount when concrete is thrown into a formwork having a feeding port at an upper end thereof. A means for preliminarily adding a feeding speed is provided in advance, while the concrete is being poured into the formwork, the weighted means is used to measure the weight that has been put into the formwork, and the loading speed is set in advance according to the capacity and structure of the formwork. In addition, the input speed adjusting means is controlled on the basis of the input weight. Therefore, similarly to the first aspect, it is possible to reliably prevent air from being mixed into concrete in the formwork or separation of concrete material. In addition to automating concrete input, it is also possible to adjust the input amount according to variations in the specific gravity of concrete.

In the method for controlling the amount of concrete input to the mold according to claim 3, the same operation as in claim 1 or 2 is achieved, but the concrete which has been added at least at the final stage of the concrete input into the form is The level is measured by the level measuring means, and the concrete injection end timing is determined based on the measured level. Therefore, even if the specific gravity of the concrete varies, the concrete can be reliably and automatically filled up to the upper end of the formwork.

According to another aspect of the present invention, there is provided a concrete feed amount control device for controlling the amount of concrete fed from the concrete feed means to the form having an inlet at the upper end. The pouring speed adjusting means provided is used to adjust the pouring speed, and the weight measuring means measures the weight of the concrete that has been poured into the mold. The control means has a map in which the input speed characteristics of concrete input to the form are preset according to the capacity and structure of the form, and controls the input speed adjusting means based on the measured weight received from the weight measuring means.

In the concrete input control device for a concrete form according to claim 5, the same operation as in claim 4 is achieved,
The level measuring means measures the level of the injected concrete at least in the final stage of the concrete injection into the form, and the injection end control means determines the end timing of the concrete injection based on the measurement level received from the level measuring means.

[0017]

According to the method for controlling the amount of concrete input to the mold according to the first aspect of the present invention, the supplying speed adjusting means is provided in advance in the concrete supplying means, and the concrete is charged into the mold according to the capacity and structure of the form. Since the charging speed adjusting means is controlled so that the charging is performed with the preset charging speed characteristic,
It is possible to reliably prevent air from entering the concrete in the formwork and separation of the concrete material to improve the quality of the product, and it is possible to automate the concrete injection and reduce the production cost.

In the method for controlling the amount of concrete input to the formwork according to the second aspect of the present invention, the supplying speed adjusting means is provided in advance in the concrete supplying means, and while the concrete is input into the formwork, the weight of the applied weight is measured by the weight measuring means. However, since the input speed adjusting means is controlled based on the input weight so as to input at a setting speed characteristic preset according to the capacity and structure of the form, concrete in the form, as in claim 1, The product quality can be improved by reliably preventing the inclusion of air into the interior and the separation of concrete materials, etc., and it is possible to reduce the production cost by automating the concrete injection and respond to the variations in the specific gravity of concrete. Since it is possible to adjust the input amount, the quality of the product can be improved.

According to the method for controlling the amount of concrete input into the mold according to claim 3, the same effect as that of claim 1 or 2 can be obtained, but the level of the added concrete is at least at the final stage of the concrete input into the form. Is measured by the level measuring means, and the end timing of concrete injection is determined based on the measured level, so even if the specific gravity of concrete varies, the concrete can be reliably and automatically reached to the top of the formwork. Since it can be filled, the accuracy of the outer shape of the product can be improved.

According to another aspect of the present invention, there is provided a concrete amount control device for controlling the amount of concrete to be added to the form, which comprises a speed adjusting means for adjusting the speed of the concrete, and a weight measuring means for measuring the weight of the concrete already injected into the form. Claims, since there is a map in which the input speed characteristics of concrete input into the form are preset according to the capacity and structure of the form, and the input speed adjusting means is provided based on the measured weight received from the weight measuring means. As in the case of 2, it is possible to reliably prevent air from entering the concrete in the formwork and the separation of concrete material, etc. to improve the quality of the product, and to automate the concrete injection and reduce the production cost. It is also possible to adjust the input amount according to the variation in the specific gravity of concrete, so that the product quality can be improved.

[0021] In the concrete input control device for a concrete form according to claim 5, the same operation as in claim 4 is achieved,
Since at least the final level of concrete injection into the formwork is provided with level measuring means for measuring the level of the injected concrete, and end control means for determining the end timing of concrete injection based on the measurement level received from the level measuring means. Similarly to the third aspect, even if the specific gravity of the concrete varies, the concrete can be reliably and automatically filled up to the upper end of the mold, so that the accuracy of the outer shape of the product can be improved.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. This embodiment is an example in which the present invention is applied to a concrete input control technology in a concrete input station of a production line for mass-producing secondary concrete products such as box culverts and U-shaped culverts of various sizes. As shown in FIG. 1 and FIG. 2, the formwork support base 3 on which the formwork 2 having the inlet 1 is placed is conveyed on the conveyor 4 of the manufacturing line by the lift-and-carry method. As the mold 2, a plurality of types of molds 2 having various capacities and structures are applied, but a mold 2 for box culvert having a certain capacity and structure is shown.

At the concrete pouring station,
A concrete supply device 5 is provided above the conveyor 4, and the concrete supply device 5 is mounted on the concrete supply hopper 6, a supply cylinder portion 7 connected to the lower end of the supply hopper 6, and an intermediate portion of the supply cylinder portion 7. The feeding speed adjusting mechanism 10 including the rotary feeder 8 and the inverter motor 9 that rotationally drives the rotary feeder 8, the concrete in the mold 2 from above the charging port 1 of the mold 2 fixedly attached to the supply hopper 6. A level measuring instrument 11 for measuring the liquid level is provided. In addition, concrete is supplied to the concrete supply hopper 6 through a concrete supply vehicle or a piping system (not shown).

As the concrete, which has excellent fluidity such as hyper-formance concrete, high-fluidity concrete, superfluidity concrete, etc. is applied, after the completion of the addition, it is possible to add vibration to the formwork 2 at the time of adding the concrete. The surface of the concrete becomes horizontal. The injection speed adjusting mechanism 10 adjusts the rotation speed of the rotary feeder 8 to adjust the concrete injection speed. The concrete injection speed (unit: Kg / sec) is
When the specific gravity of the concrete is kept constant, it is proportional to the speed of the inverter motor 9, and when the inverter motor 9 is stopped, the input speed becomes zero. The level measuring device 11 is configured to project an ultrasonic wave downward and detect the concrete liquid level from the reflected wave. However, it is also possible to apply a level measuring device which projects an infrared ray or a laser beam and detects the concrete liquid level from the reflected wave.

The formwork support 3 is composed of two vertically spaced base plates 3a having a rectangular shape.
In between, four load cells 13 corresponding to a means for measuring the weight of the concrete already put in the formwork 2 are interposed. The weights measured by the four load cells 13 include the weight of the upper base plate 3a, the weight of the mold 2, the weight of the rebar assembly 12, and the weight of the concrete that has been put into the mold 2. . The mold 2 includes an outer mold 2A including a bottom plate panel and four side wall panels, and an inner mold 2B horizontally mounted through the outer mold 2A in a penetrating manner. And the rebar assembly 12 inside
After that, the inner formwork 2B is inserted into the outer formwork 2A and the reinforcing bar assembly 12 in an insertion manner.

Next, the control system of the concrete input control device will be described. As shown in FIG. 3, the control unit 20 of the concrete input control device includes an input interface 21 for reading detection signals from the four load cells 13, an ultrasonic wave generator 11a of the liquid level sensor 11, and ultrasonic wave detection. An input interface 22 for the device 11b, a microcomputer including a CPU 23, a ROM 24, and a RAM 25, a drive circuit 26 including an inverter for the inverter motor 9, a bus 27 such as a data bus, and the like.

The ROM 24 previously stores a later-described control program for controlling the input amount and tables and maps associated therewith, and the RAM 25 is provided with various work memories necessary for the control. Explaining the outline of this input amount control, the input speed characteristics when the concrete is input to the formwork 2 are preset according to the capacity and structure of the formwork 2, and the input speed is controlled according to the input speed characteristics. (See FIG. 4).

FIG. 4 shows an example of an injection speed characteristic and an injection rate for the form 2 for a box culvert of a certain size. The injection speed is gradually increased up to the liquid level L1 shown in FIG. The air is prevented from accumulating on the lower surface side of the bottom wall of the inner formwork 2B by allowing the air to enter at a low speed. After that, since there is little possibility that air will be mixed from the liquid level L1 to the liquid level L2, a constant high feeding speed is maintained, the feeding efficiency is secured, and the separation of the concrete material is prevented. After that, the injection speed is gradually decreased after the liquid level L2 to facilitate monitoring so that concrete does not overflow from the upper end of the mold 2.

Explaining the tables and maps, although not shown, a plurality of loading speed characteristics for all types of molds 2 are set beforehand according to the capacity and structure of each mold 2 and a loading speed characteristic map. , Form N as shown in FIG.
o., the type of feeding speed characteristics, and the formwork weight (in this case, including the weight of the rebar assembly 12, if any), the formwork table, and the loading speed and the motor rotation speed as shown in FIG. There is provided a motor rotation speed map and the like in which the relationship of (1) is preset.

Next, the routine for controlling the input amount when the concrete is input into the mold 2 will be described with reference to the flowchart of FIG. In the following flow chart, the symbol Si (i = 1, 2, ...) Indicates each step.
When the main switch of the concrete input control device is turned on, the control is started, and the detection signals of the four load cells 13 are first read (S1), and the four load cells 13 are read.
By subtracting the weight of the upper base plate 3a from the weight detected in step S1, the self-weight of the formwork 2 including the reinforcing bar assembly 12 is calculated (S2), and the self-weight of the formwork 2 is calculated using the formwork table of FIG. Apply to the form No. And the type of the closing speed characteristic are calculated (S3). Next, in order to measure the time from the start of the feeding speed control, the timer (TM) is reset and then started (S4), and then the time measured by the timer TM, the determined mold number and the feeding. The closing speed is calculated from the closing speed characteristic corresponding to the type of the speed characteristic (this is in the closing speed characteristic map) (S5).

Next, the input speed is applied to the map of FIG. 6 to calculate the motor rotation speed N (rotation speed) (S
6) Next, a motor control signal for controlling the inverting motor 9 so that the motor rotation speed becomes N is output to the drive circuit 26 (S7). Next, the measured time TM is the end time t
It is judged whether or not it is e or more (S8), and if the judgment is No, S
Since the process returns to step 5 and S5 and the subsequent steps are repeatedly executed, it is possible to control the concrete feeding speed so as to obtain the above-mentioned feeding speed characteristic. When the measured time TM reaches the closing time te, in S9, a motor control signal for stopping the motor is output to the drive circuit 26, the motor 9 is stopped, and this concrete input amount control is ended.

As described above, by controlling the charging speed when the concrete is charged into the mold 2 so that the charging speed characteristic is preset according to the capacity and structure of the mold 2, 2 can be automatically filled with concrete without excess or deficiency. The injection speed characteristic is appropriately set in advance in accordance with the capacity and structure of the mold 2, and for example, the injection is performed at a low speed that gradually increases up to the liquid level L1 in FIG. Air can be reliably prevented from remaining on the lower surface side of the bottom wall. As a result, the quality of the product can be improved.

After the liquid level L1 is exceeded, the liquid level L
Up to 2, by pouring at a high constant pouring speed, it is possible to prevent the separation of the concrete material while securing the pouring efficiency. As a result, product quality can be improved and productivity can be increased. From the period of 0 to t1 in FIG.
Since the setting is made so that the closing speed continuously changes during the period from to t2, the motor control can be smoothed. After reaching the liquid level L2, since the injection is carried out at a low speed that gradually decelerates from a high constant injection speed, manual work for adjusting the excess or deficiency of the concrete injection amount due to variations in the specific gravity of the concrete or the adjustment thereof. Control is simplified. Then, from the period of t1 to t2 in FIG.
Since the charging speed is set to continuously change over the period of, the motor control can be smoothed.

First Alternative Example Next, a first alternative example of the concrete input amount control will be described with reference to FIGS. 8 to 10. In this concrete input amount control, similarly to the above-mentioned embodiment, the input speed is controlled so as to have the input speed characteristic, but in order to deal with the variation in the specific gravity of the concrete, the weight of the concrete input during the concrete input is adjusted. Is detected, and the feeding speed is corrected based on the detected weight. This will be described with reference to the flowchart of FIG.
Similar to S4, S21 to S24 are executed. Next S25
In, the detection signals of the four load cells 13 are read, and the actual input amount Wac that has been input to the mold 2 is calculated from the weight and the mold self-weight obtained from the detection signals (S26).
Next, S27 and S28 are executed similarly to S5 and S6. Next, the target input weight Wth is calculated from the timer time TM and the input speed characteristic (S29). In this case, the target input weight Wth is obtained from the time integration from the start of control of the input speed characteristic to the current time.

Next, it is determined whether or not the actual input amount Wac> the target input weight Wth (S30). If the determination is Yes, Wa
c, Wth, and the correction coefficient α (where 0 <α <1.0) is calculated from the preset map as shown in FIG. 9 (S3
1), the motor rotation speed N is reduced and corrected to N × α (S3
2). On the other hand, when the determination in S30 is No, the actual input amount W
It is determined whether ac <target input weight Wth (S33), and if the determination is Yes, Wac, Wth and a correction coefficient β (1.0 <β) are calculated from a preset map as shown in FIG. Then, (S34), the motor rotation speed N is increased and corrected to N × β (S35).

In S36 subsequent to S32 or S35, a motor control signal for controlling the inverter motor 9 so as to have the rotation speed N is output to the drive circuit 26, and then the measured time TM is equal to or longer than the closing end time te. It is determined whether or not (S3
7) If the determination is No, the process returns to S25 and the processes from S25 onward are repeatedly executed, so that the concrete loading speed can be controlled so as to have the above-described loading speed characteristic.
When the measured time TM reaches the closing time te, S
At 38, a motor control signal for stopping the motor is output to the drive circuit 26, the motor 9 is stopped, and the concrete amount control is finished.

In the concrete input amount control of this other embodiment, the actual input amount Wac is obtained based on the detection signal of the load cell 13, the target input weight Wth is obtained from the time count TM and the input speed characteristic, and Wac> Wth Sometimes, the motor rotation speed N is corrected to decrease, and when Wac <Wth, the motor rotation speed N is corrected to increase. Therefore, even if there are variations such as the specific gravity of concrete, it is possible to accurately follow the input speed characteristics. The input amount can be controlled.

Second Alternative Example Next, a second alternative example of the concrete input control will be described with reference to FIGS. This concrete input control is almost the same as in the above embodiment,
If the specific gravity of the concrete is varied, the concrete may not be filled to the upper end of the formwork 2 even after the concrete is put in, or the concrete may overflow from the upper end of the formwork 2 at the final stage of the concrete input. In consideration of this, the timing of ending the concrete injection is determined based on the detection signal of the liquid level sensor 11, and the upper end of the mold 2 is filled without excess or deficiency.

In the form table in this embodiment, as shown in FIG. 12, the final liquid level Le which is equal to the upper end face of the form 2 is set for each form. Explaining with the flowchart of FIG. 11, S is the same as S1 and S2.
41 and S42 are executed, the form 2
Applying the self-weight to the form table in Fig. 12, When,
The type of the charging speed characteristic and the final liquid level Le are calculated, and then S44 to S47 are executed in the same manner as S4 to S7. Next, the detection signal of the liquid level sensor 11 is read (S48), the current liquid level L is calculated from the detection signal (S49), and then whether the liquid level L ≧ final liquid level Le or not When the determination is No (S50), the determination is No, it is determined whether or not the measured time TM ≧ the end time te (S51). When the determination in S51 is No, the process returns to S45 and S45 and subsequent steps are repeated.

When the determination in S51 is Yes, it becomes impossible to set the closing speed from the closing speed characteristic.
The motor rotation speed N is set equal to the latest motor rotation speed N (S52), the process returns to S47, and S47 and subsequent steps are repeated. On the other hand, as a result of the determination in S50, if the liquid level L ≧ the final liquid level Le, the concrete has been filled up to the upper end surface of the form 2, so the motor control signal for stopping the motor is sent to the drive circuit 26. It is output (S53), and then the control ends. In this way, when the liquid level L ≧ the final liquid level Le, the motor 9 is stopped without restriction of the timing time TM, so that the upper end of the mold 2 is filled with concrete and then the mold 2 is filled. It is possible to reliably prevent concrete from overflowing from the upper end of the.

Further, liquid level L <final liquid level Le
In this case, since the concrete is continuously supplied even when the measured time TM reaches the closing end time te, it is possible to reliably prevent the concrete injection from being stopped at a level lower than the upper end of the form 2, and The concrete can be reliably filled up to the upper end of 2. As described above, even if there are variations in the specific gravity of the concrete, the concrete can be filled up to the upper end of the mold 2 without excess or deficiency, so that the waste of the concrete is eliminated and the quality of the product can be improved.
In addition, since the rebar assembly 12 is not exposed above the upper end of the mold 2, the liquid level sensor 11 is installed in the rebar assembly 1
Also, erroneous control due to detection of 2 does not occur.

Third Alternative Example Next, a third alternative example of the concrete input control will be described with reference to FIGS. 13 to 14. This concrete input control applies the same idea as the second alternative embodiment to the first alternative embodiment. If the specific gravity of the concrete is uneven, the concrete cannot be filled up to the upper end of the formwork 2 even after the concrete is put in, or the formwork 2 at the final stage of the concrete throwing.
Considering that concrete may overflow from the upper end of the mold, the end timing of concrete injection is determined based on the detection signal of the liquid level sensor 11 as in the second embodiment, and the end of the mold 2 is reached. Fill just enough.

In the mold table in this embodiment, as shown in FIG. 12, the final liquid level Le which is equal to the upper end surface of the mold 2 is set for each mold. Explaining with reference to the flowcharts of FIGS. 13 and 14, after the control is started, S61 and S62 are executed similarly to S21 and S22, and then in S63, the dead weight of the mold 2 is applied to the mold table of FIG. Frame No. And the type of input speed characteristics,
The final liquid surface level Le is calculated. Next, a timer (T
M) is reset and then started (S64), then the detection signals of the four load cells 13 and the liquid level sensor 11 are read (S65), and then S26 to S
Similarly to 36, S66 to S76 are executed.

Next, the current liquid level L is calculated based on the detection signal of the liquid level sensor 11 read in S65 (S77), and then the liquid level L ≧ final liquid level L
It is determined whether or not e (S78), and if the determination is No,
It is determined whether or not the measured time TM ≧ end time te (S79),
When the determination in S79 is No, the process returns to S65 and S65 and subsequent steps are repeated.

When the determination in S79 is Yes, it is not possible to set the closing speed from the closing speed characteristic, so that
The motor rotation speed N is set equal to the latest motor rotation speed N (S80), the process returns to S76, and S76 and the subsequent steps are repeated. On the other hand, as a result of the determination in S78, if the liquid level L ≧ the final liquid level Le, the concrete has been filled up to the upper end surface of the formwork 2, so the motor control signal for stopping the motor is sent to the drive circuit 26. The output is performed (S81), and then the control ends. In this way, when the liquid level L ≧ the final liquid level Le, the motor 9 is stopped without restriction of the timing time TM, so that the upper end of the mold 2 is filled with concrete and then the mold 2 is filled. It is possible to reliably prevent concrete from overflowing from the upper end of the.

Further, liquid level L <final liquid level Le
In this case, since the concrete is continuously supplied even when the measured time TM reaches the closing end time te, it is possible to reliably prevent the concrete injection from being stopped at a level lower than the upper end of the form 2, and The concrete can be reliably filled up to the upper end of 2. As described above, even if there are variations in the specific gravity of the concrete, the concrete can be filled up to the upper end of the mold 2 without excess or deficiency, so that the waste of the concrete is eliminated and the quality of the product can be improved.
In addition, since the rebar assembly 12 is not exposed above the upper end of the mold 2, the liquid level sensor 11 is installed in the rebar assembly 1
Also, erroneous control due to detection of 2 does not occur.

Next, a modified mode in which a part of the above embodiment is modified will be described. 1] In the above-described embodiment, the case where the concrete having high fluidity is applied and the vibration is not applied to the mold 2 has been described as an example. However, a vibration adding means for adding vibration to the mold 2 is provided to replace the normal concrete. Even if it is applied, if the operation of the vibration adding means is intermittently stopped and the detection by the load cell 13 and the level measuring device 11 is performed during the stop, the present invention can be similarly applied. it can.

2] It is not always necessary to provide four load cells 13 and the weight can be detected even if three or two load cells 13 are provided, and instead of the load cells 13, the weight can be measured via air pressure or hydraulic pressure. A detection type sensor or another sensor having a weight detection function can be applied. 3] In order to simplify the calculation of the target input weight Wth, the input rate characteristics or the input weight characteristics as shown in FIG. 4 are set in advance in a map, and the target input weight W is calculated from the map.
It may be configured to obtain th.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a concrete input control device according to an embodiment of the present invention.

FIG. 2 is a partially longitudinal side view of a concrete input amount control device.

FIG. 3 is a block diagram of a control system of the concrete input amount control device.

FIG. 4 is a diagram illustrating a charging speed characteristic and a charging rate.

FIG. 5 is a diagram of a formwork table.

FIG. 6 is a diagram of a map in which the relationship between the motor rotation speed and the closing speed is set.

FIG. 7 is a flowchart of concrete input control.

FIG. 8 is a flowchart of concrete input control according to the first alternative embodiment.

FIG. 9 is a diagram of a map in which a correction coefficient α is set.

FIG. 10 is a diagram of a map in which a correction coefficient β is set.

FIG. 11 is a flowchart of concrete input control according to a second embodiment.

FIG. 12 is a diagram of a form table.

FIG. 13 is a part of a flowchart of concrete input control according to a third embodiment.

FIG. 14 is the rest of the flowchart of the concrete input amount control of FIG.

[Explanation of symbols]

 1 Input Port 2 Formwork 5 Concrete Supply Device 8 Rotary Feeder 9 Inverter Motor 10 Input Speed Adjustment Mechanism 11 Level Measuring Device 13 Load Cell 20 Control Unit

Claims (5)

[Claims] 1. A method for controlling an input amount when concrete is input from a concrete supply means to a formwork having an input port at an upper end thereof, wherein the concrete supply means is provided with an input speed adjusting means in advance, A method for controlling the amount of concrete input into a form, characterized in that while the concrete is being input, the input speed adjusting means is controlled so that the concrete is supplied at a setting speed characteristic preset according to the capacity and structure of the form. 2. A method for controlling an input amount of concrete when the concrete is supplied from the concrete supply means to a formwork having an input port at an upper end thereof, wherein the concrete supply means is provided with a supply speed adjusting means in advance, While pouring concrete, measure the pouring weight with the weight measuring means and control the pouring speed adjusting means based on the pouring weight so that the concrete can be poured with the preset speed characteristics according to the capacity and structure of the formwork. A method for controlling the amount of concrete input into a formwork, characterized by: 3. The level measurement means measures the level of the concrete that has been added at least at the final stage of the concrete injection into the formwork, and the end timing of the concrete injection is determined based on the measured level. The method for controlling the amount of concrete input to the formwork according to claim 1 or 2. 4. An apparatus for controlling an amount of concrete when the concrete is supplied from the concrete supply means to a formwork having an input port at an upper end portion, the input speed adjusting means provided in the concrete supply means, and the formwork. Weight measuring means for measuring the weight of the concrete that has already been put in, and a map that presets the input speed characteristics of concrete input to the mold according to the capacity and structure of the mold, and receives from the weight measuring means. A concrete injection amount control device for a formwork, comprising: a control device that controls an injection speed adjusting device based on a measured weight. 5. A level measuring means for measuring the level of the concrete that has been injected at least in the final stage of the concrete injection into the form, and an injection for determining the end timing of the concrete injection based on the measurement level received from the level measuring means. The concrete input control device for a mold according to claim 4, further comprising: end control means.