JPH02157359A - Concrete automatic compaction device and processing thereof - Google Patents

Abstract

PURPOSE:To execute automatic compaction with homogeneous filling of concrete by starting a mold vibrator when the height of the striking and forming of concrete in a mold reaches a predetermined value, while stopping it when an integrated value of excitation force and excitation time reaches a predetermined value. CONSTITUTION:One or more of a mold vibrator 12 is defined as one unit, and a concrete sensor 13 and a vibration sensor 14 are formed in each unit. Concrete is struck and formed in a mold 1, and when the concrete sensor 13 detects that the height of striking and forming of concrete reaches a predetermined value, the mold vibrator 12 is started. When the vibration sensor 14 recognizes that an integrated value of excitation force and excitation time reaches a predetermined value, the actuation of the mold vibrator 12 is stopped. Great amount of concrete can thus be automatically compacted with homogeneous filling.

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an automatic concrete compaction device and a method of automatically compacting concrete cast in formwork using this device. .

(Prior art) When concrete is placed on site or at a PC (precast concrete) component manufacturing factory, conventionally, when concrete is poured into a formwork, a vibrator such as a rod-shaped vibrator is inserted into the upper opening of the formwork. The material was vibrated to spread it to every corner of the formwork, and to fill it densely.

However, in recent years, with the rise in the height of reinforced concrete buildings, the amount of reinforcing bars placed has increased, the height of concrete placed at a time has increased, and PC members have become larger, making it easier to use rod-shaped vibration exciters. The situation is such that it is difficult or impossible to insert it deeply.

Therefore, as shown in Fig. 3, a vibrator 2 is installed outside the formwork 1.
A method L (Japanese Unexamined Patent Publication No. 61-64957
) has been adopted.

In this construction method, a vibrator 2 is installed in the center of the outside of the formwork 1, a start sensor 3 is installed at the bottom, and an end sensor 4 is installed at the top. When it reaches the installation position, a signal is sent from the start sensor 3 to the controller 5, and the vibrator 2 starts operating, vibrating the formwork 1 and promoting the filling properties of the ready-mixed concrete C.

In this way, when the fresh concrete C, which has been poured while being applied vibration by the vibrator 2 through the formwork 1, reaches the installation position of the end sensor 4, a signal is sent from the end sensor 4 to the controller 5. The operation of the vibrator 2 stops.

(Problem to be solved by the invention) However, with the method of applying vibration from the outside as described above,
The vibration force applied to fresh concrete C is weak.

Due to this limitation in terms of performance, only a small amount is required.

It was only possible to apply vibration to a small area, and when pouring concrete into a high-rise building or 20 large members, it was necessary to divide the area to be vibrated into multiple sections and apply detailed vibration work to each section.

In addition, the conventional vibrator 2 shown in FIG. 3 operates only when the pouring level of fresh concrete C exists between the lower start sensor 3 and the upper end sensor 4, so the concrete pouring height is increased. When carrying out the process in multiple directions, it is necessary to install multiple sensors 3 and 4 on the start and end sides, and one of the end sensors 4 must be installed at the concrete placement completion position (high place). Therefore, the installation work for both sensors 3 and 4 was complicated.

Moreover, when the height of the concrete poured into the formwork 1 reaches the installation position of the end sensor, the vibration work ends regardless of the compaction state of the concrete, making it impossible to ensure reliable and accurate compaction work. I couldn't do it.

Furthermore, plywood veneer is generally used as the formwork 1 for pouring concrete. Since the veneer plywood is opaque, it is not possible to check the filling status of the ready-mixed concrete C in the formwork 1.

Therefore, in the past, a worker struck the outside of the formwork 1 with a hammer, etc., listened to changes in the timbre of the echoes, moved the vibrator 2 to the part judged to be insufficiently filled, and vibrated again. They were forced to perform complicated tasks such as

The present invention has been made in view of the above points, and its purpose is to make it extremely easy to install a device that applies vibration from outside the formwork, and to also facilitate vibration work using this device. Moreover, it is an object of the present invention to provide an automatic concrete compaction device and construction method that can easily achieve a uniform filling degree over the entire area of concrete placement.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a formwork vibrator that vibrates concrete in the formwork via the formwork, and a formwork vibrator that detects the pouring height of the concrete in the formwork and Consisting of a concrete sensor that starts the operation of the frame vibrator, a vibration sensor that detects the integrated value of the excitation force and excitation time of the formwork vibrator and stops the operation of the formwork vibrator, and one formwork pie break. Or, a plurality of units are considered to be one unit, and at least one concrete sensor and vibration sensor are used for each formwork vibrator or for each unit, and at least one unit is installed at an appropriate position on the outside surface of the formwork for concrete pouring, When the top of concrete pouring exceeds the concrete sensor that is poured from outside the formwork, the power supply circuit of the formwork pie break is closed by the signal from the concrete sensor, and the excitation force of the formwork vibrator and the This is achieved by opening the power supply circuit in response to a signal from the vibration sensor when the cumulative value of the shaking time reaches a predetermined value, thereby performing pouring and compaction of concrete for each unit.

(Function) The device according to the present invention is attached to the outer surface of a formwork for concrete pouring, and a concrete sensor is driven into the formwork from outside the formwork using, for example, a hammer.

When concrete pouring into the formwork starts in this condition and the concrete reaches the concrete sensor,
The signal from this sensor turns on the power, and the formwork vibrator starts operating.

The vibration sensor detects that the formwork vibrator has applied a predetermined integrated value of excitation force and excitation time, and the above-mentioned power supply is turned off in response to this detection signal, and the operation of the formwork vibrator is stopped.

Further, the construction method according to the present invention includes one unit or a plurality of formwork vibrators having the above-mentioned functions,
At least 1 per formwork vibrator or per unit
Using concrete sensors and vibration sensors.

Then, at least one unit is attached to an appropriate position on the shoring constructed on the outer surface of the formwork, and the concrete sensor is driven into the formwork as described above.

In this state, concrete placement will begin. If one concrete sensor is used for each formwork piebreak, each formwork vibrator will be powered on and activated for each formwork piebreak when the concrete reaches each concrete sensor. . Note that when concrete reaches any one concrete sensor in one unit, all formwork vibrators in one unit may start operating at the same time.

Further, when one concrete sensor is used in one unit, when the concrete reaches this concrete sensor, all the formwork vibrators are turned on and start operating at the same time.

When one vibration sensor is used for each formwork vibrator, each vibration sensor detects the excitation force and excitation time of each formwork pie break, and when a predetermined value is reached, each vibration sensor The power to each formwork vibrator is turned off by the signal from the machine, and the operation of each formwork vibrator stops. This action can also be performed using a signal from any one vibration sensor in one unit.

In addition, when one vibration sensor is used in one unit, the power is turned off when the integrated value of the excitation force and excitation time detected by this vibration sensor reaches a predetermined value, and all formwork vibrators are operation stops all at once.

Furthermore, as mentioned above, the vibration sensor detects the integrated value of the excitation force and excitation time of the formwork vibrator.
It detects not only whether the formwork vibrator is operating, but also whether or not it has applied effective vibration for concrete compaction. In other words, if the formwork vibrator is not properly attached to the shoring and the shoring is not properly attached to the formwork, the amplitude of the formwork vibrator will increase, and these poor attachments will not provide effective vibration for concrete compaction. We can confirm that this is not the case.

After pouring and compacting concrete for one unit as described above, concrete is placed on top of it or on its left side.

One unit of the apparatus according to the present invention is installed on the right side (it may be installed in advance), and concrete is placed and compacted in the same manner as above.

This operation is repeated to complete concrete placement and compaction to the required height.

(Embodiment) FIG. 1 shows an embodiment of the apparatus according to the present invention, in which 12 is a formwork vibrator that vibrates the concrete inside the formwork 1 through the formwork 1, and 13 is a formwork vibrator that vibrates the concrete inside the formwork 1. The concrete sensor detects the height of concrete placement and starts the operation of the formwork pie break 12.The concrete sensor detects the integrated value of the excitation force and vibration time of this formwork vibrator 12 and starts the operation of the formwork vibrator 1.
A vibration sensor 14 is provided in contact with the formwork pie break 12 to stop the operation of the formwork pie break 12. Note that this vibration sensor 14 may be attached to the surface of the mold.

The formwork pie break 12 includes a so-called vertical round end vibe 15 and a horizontal round end vibe 16 installed on both outsides of the formwork 1.
In this example, a concrete sensor 13 is installed above the formwork vibrator 12 (either on the left side or the right side) and is placed in contact with the formwork support consisting of the formwork 1 from the outside to the inside. .

Therefore, the concrete sensor 13 is preferably nail-shaped so that it can be easily driven into the outside or inside of the formwork 1 with a hammer or the like.

Further, the concrete sensor 13 described above is connected to a power source (a power source that can adjust voltage and frequency) 17 via a repeater 11, the vibration sensor 14 is connected to a controller 18 via a repeater 11, and the controller 18 is connected to a controller 18 for management. Each is connected to a computer 19.

In the above condition, fresh concrete C is poured into the formwork 1, and when the fresh concrete C is poured above the concrete sensor 13, the circuit of the power supply 17 is closed by the signal from the concrete sensor 13, and the formwork vibrator 12 is activated.

At this time, as a means for detecting the level of fresh concrete C placed by the concrete sensor 13, Japanese Patent Application Laid-Open No. 63-44
The means proposed in No. 159 can be preferably applied.

That is, at least the entire surface of the concrete sensor 13 is adjusted with a material other than iron (for example, zinc, aluminum, carbon, etc.), and this concrete sensor 13 and the formwork 1
Separator 20 combined with reinforcing bars (not shown) inside
Connect with lead wire.

When fresh concrete C is filled around the concrete sensor 13 and separator 20 in such a state, an electromotive force is generated between them. For example, in the case where the concrete sensor 13 is made of a galvanized iron nail, the concrete sensor 13 is a circle pole and the separator 20 is a square pole, and an electromotive force of about 0.5 to 0.7V is generated between the two.

This electromotive force closes the above power supply circuit.

When the formwork vibrator 12 starts operating in this way, the vibration sensor 1 provided on the formwork vibrator 12
4 detects the integrated value of the excitation force and excitation time, transmits the signal to the controller 18 via the repeater 11, and records it in the computer 19.

Management items such as the excitation force of the formwork vibrator 12, the excitation time, the mounting position, the operation status, and the amount of concrete placed are input into the computer 19.

The above-mentioned signals recorded in the computer 19 are checked against these management items, and the excess and deficiency signals are recorded in the computer 1.
9 to the controller 18.

Next, a signal corresponding to the above-mentioned excess or deficiency is transmitted from the controller 18 to the power supply 17 via the repeater 11, the voltage 1 frequency, etc. are adjusted, and the excitation force of the formwork vibrator 12 is adjusted.

Then, when the integrated value of the excitation force and the excitation time reaches a predetermined value, the power supply circuit is opened, the operation of the formwork vibrator 12 is stopped, and the compaction of the concrete C is completed.

FIG. 2 shows an embodiment of the method according to the present invention. In this example, nine of the above-mentioned apparatuses according to the present invention are used as one unit, and one column 100 and one wall 101 are poured concrete. The work is carried out in one operation of concrete pouring and compaction.

In FIG. 2, 21 is a device according to the present invention, and six of these devices 21 are installed at approximately equal intervals on horizontal round end vibes 16 constructed on the formwork 1 of the wall 101. The remaining three devices 21 are attached to the horizontal round end vibes 16 constructed on the formwork 1 of the column 100, arranged at approximately equal intervals.

Each concrete sensor 13 of these nine devices 21 is connected to a power source 17 via a repeater 11, and each vibration sensor 1
4 are respectively connected to a controller 18 via a repeater 11, and the controller 18 is connected to a management computer 19.

In this state, fresh concrete is poured from the top of the formwork 1, and when the top of the fresh concrete reaches each concrete sensor 13 or higher, each formwork pie break 12 is activated, and the fresh concrete is vibrated through the formwork 1. is added to compact the fresh concrete.

This excitation force and excitation time are detected by each vibration sensor 14,
By the action of the controller 18 and the computer 19, the voltage, frequency, etc. of the power source 17 are adjusted, and the excitation force, excitation time, etc. of each mold vibrator 12 are controlled.

Then, when the integrated value of the excitation force and excitation time for each formwork vibrator 12 reaches a predetermined value, each formwork vibrator 1
2, the power supply 17 is turned off and its operation is stopped.

Note that the nine formwork vibrators start operating, and the excitation force and vibration are controlled by signals from only the concrete sensor 13 and vibration sensor 14 of one device 21, for example, the device 21 installed at the top of the column 100. It is also possible to control the time and stop the operation. However, the vibration sensor 14
It is preferable to operate all of them.

When all nine formwork pie breaks 12 have finished operating, these nine devices 21 according to the present invention are placed on one side of the wall 101 on the right or left and on one of the pillars 100. Concrete placement and compaction for walls 101 and columns 100 are performed.

Repeat the above operations to complete the concrete pouring work for the columns and walls.

Furthermore, in each of the above-mentioned embodiments, a vibration sensor having a structure capable of detecting the excitation force and the excitation time was used, but this is because it is assumed that the excitation force is changed, and in the present invention, For example, the present invention is not limited to this, and may be a timer means that detects only the excitation time (the excitation force is kept constant), and various modifications are possible.

(Effects of the Invention) As described in detail above, according to the apparatus and construction method according to the present invention, it is possible to perform concrete pouring and compaction in large quantities and over a large area at once, and the construction period is shortened.

Further, the sensor for detecting the concrete placement position can be placed at the vibration start position, and there is no need to install it at a high place as in the conventional case, which facilitates the installation work.

One sensor for detecting the start and end of vibration is sufficient for each device according to the present invention, and in addition, in the construction method according to the present invention, a plurality of sensors according to the present invention can be used in one unit. When used as a unit, one of each per unit may be sufficient.

Therefore, the installation work of the sensor is simpler than that of the prior art described above.

Furthermore, the compaction state (filling state) of the fresh concrete in the formwork can be easily detected by a vibration sensor, and compaction work can be performed reliably and accurately.

In addition, poor construction of formwork and shoring can be easily detected using this vibration sensor.

Furthermore, it is possible to achieve various effects such as being able to compact the concrete uniformly over the entire area of concrete placement.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an embodiment of the apparatus according to the present invention, FIG. 2 is an explanatory diagram showing an embodiment of the construction method according to the present invention, and FIG.
The figure shows a conventional technique. 15.16... Formwork shoring 17... Power supply 18... Controller 19... Computer

Claims (2)

[Claims] (1) A formwork vibrator that vibrates the concrete in the formwork via the formwork, a concrete sensor that detects the placement height of the concrete in the formwork and starts the operation of the formwork vibrator, and a formwork vibrator that vibrates the concrete in the formwork. An automatic concrete compaction device comprising a vibration sensor that detects the integrated value of vibration force and vibration time and stops the operation of a formwork vibrator. (2) One or more formwork vibrators are considered as one unit, and at least one concrete sensor and vibration sensor are used for each formwork vibrator or for each unit, and the outside surface of the formwork for concrete pouring is used. At least one unit is installed at an appropriate position in the formwork, and when the top of concrete pouring exceeds the concrete sensor that is poured from outside the formwork, the power circuit of the formwork vibrator is closed by a signal from the concrete sensor, and the formwork vibrator's power circuit is closed. 1 by opening the power supply circuit in response to a signal from the vibration sensor when the integrated value of the excitation force and excitation time of the frame vibrator reaches a predetermined value.
An automatic concrete compaction method characterized by pouring and compacting concrete for each unit.