JPH04124376A - Automatic sensor of concrete filling site - Google Patents

Abstract

PURPOSE:To facilitate handling of an automatic sensor, to improve controllability and to detect accurately the filling of concrete without making wrong detection by inserting and providing a pressure sensor between a form and a horizontal end thick pipe so that it comes into contact with the outside of the form. CONSTITUTION:In a device to tamp concrete 2 placed into a form 1 by giving vibration thereto from a vibrator 3, a pressure sensor 4 is held between the outside of the form 1 and a horizontal end thick pipe 6 to firmly fix the pressure sensor 4 so that it is brought into contact with the outside of the form 1, and it is connected to a control section 50 of a body 5. Pushing force is applied outward by placing the concrete 2 to the inside of the form 1, the pressure sensor 4 detects the pushing force caused by displacement of the form 1, so that the filling of the concrete is accurately recognized.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is an automatic sensing device for a concrete-filled area that senses whether or not concrete has been filled into a formwork during compaction of poured concrete. Regarding.

(Prior art) Is it known that in the construction of buildings, concrete placed in formwork is compacted by applying vibration to it using a pipe generator? It is necessary to understand. Regarding the so-called compaction of concrete, for example, there is a method proposed in Japanese Patent Publication No. 1621/1983, in which a sensor and pipelator to detect the filling of concrete are attached to the formwork, and the sensor is When the filling state is detected continuously for a predetermined period of time, the pipelator is operated, thereby compacting the concrete.

(Problem to be Solved by the Invention) However, in the above method, the sensor that detects the filling of concrete utilizes the conductivity of water contained in the poured concrete. This method utilizes the fact that two electrodes arranged at the same distance come into contact with the poured concrete and conduction occurs through the moisture contained in it, so conduction may also occur due to, for example, water sprinkling before pouring, which can lead to false detection. There was a risk.

In addition, the two electrodes that make up the sensor must be installed at the site where they will come into contact with the poured concrete, and although a separator penetrating the inside of the formwork can be used for one electrode, the other electrode is shaped like a nail, for example. The electrode rod needs to be inserted into the formwork by driving it into the formwork and its tip protrudes inside the formwork, and it has to be inserted through the formwork, which is a bit time-consuming and cumbersome. Met. Moreover, in the case of this nail-shaped electrode rod, a recess remains on the concrete surface due to the protruding tip of the electrode rod after completion of pouring.
There was also an inconvenience that spoiled the appearance.

This invention was made in view of the above-mentioned background, and is easy to handle, has excellent operability, and can accurately detect the filling of concrete without causing false detection, while also eliminating the inconvenience of damaging the concrete surface. The purpose of this invention is to provide an automatic sensing device for concrete filling areas that are not filled with concrete.

(Means for Solving the Problems) In order to achieve the above object, the present invention is characterized in that a pressure sensor for detecting the pressing force caused by filling with concrete is disposed outside the formwork.

Furthermore, the pressure sensor is sandwiched between the outer surface of the formwork and a horizontal thick pipe facing the outer surface of the formwork, and is provided in contact with the outer surface of the formwork. It is characterized by

(Function) With the above configuration, the pressure sensor placed outside the formwork will detect the outward pressing force applied to the formwork by filling with concrete, and this pressing force will be detected inside the formwork. This occurs when concrete is poured into the concrete, so the filling of concrete can be accurately recognized by detecting the pressure.

In particular, this pressure sensor is sandwiched between the outside surface of the formwork and a horizontal thick pipe facing the outside surface of the formwork, and is provided in contact with the outside surface of the formwork. It is designed to detect the filling pressure.

(Embodiments) Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a block diagram showing the application of a preferred embodiment of the automatic sensing device for a concrete-filled site according to the present invention.

The figure shows the overall structure of a concrete compaction device, which compacts concrete 2 placed in a formwork 1 by applying vibrations to it using a pipe plater 3. Basically, it includes a pipelator 3, a pressure sensor 4, and a main body 5, and the main body 5 includes a control section 50.

The horizontal thick pipe is assembled so as to intersect with the vertical thick pipe 7, and a separator 8 is fastened to this intersection. Also,
FIG. 2 is a side view of the pipelator portion of FIG. 1 as viewed from the arrow ■, and FIG. 3 is a sectional view of FIG. 1 as viewed from the arrow ■.

The pipelator 3 is fixed to a horizontally thick pipe via a plate 30, and is connected to a control section 50, and its operation is controlled by the control section 50.

The pressure sensor 4 has a built-in so-called strain gauge or the like, is inserted between the horizontal thick pipe and the formwork 1, and is connected to the control section 50. Specifically, the pressure sensor 4 is securely fixed by sandwiching the pressure sensor 4 between the outer surface of the formwork 1 and a thick horizontal pipe facing the formwork 1. The pressure sensor 4 is brought into contact with the outer surface of the formwork 1 to detect the filling pressure of the concrete 2. That is, by pouring concrete 2 inside the formwork 1, an outward pressing force (lateral pressure) is applied by the filling concrete 2, and this pressure increases as the concrete 2 is poured. Filled concrete top 2a
Since the height (head difference) between the pressure sensor 4 and the pressure sensor 4 increases, detection is performed by the pressure sensor 4, and the detection signal is sent to the control unit 50.

Now, FIG. 4 is a flowchart illustrating the control operation of the control section 50.

The control unit 50 receives the detection signal from the pressure sensor 4 (Sl
), when the pressure detection continues for a predetermined time (S2.YE
S) Activate Pie Break 3 (S3). Then, after a predetermined period of time has passed (34 YES), the pipe generator 3
is stopped (S5), and the control is ended.

That is, this invention basically has a pressure sensor 4 arranged outside the formwork 1 for detecting the pressing force, and with such a configuration, the pressure sensor 4 detects the displacement of the formwork 1. The resulting outward pressing force is detected, and since this pressing force is generated by pouring the concrete 2 into the formwork 1, filling of the concrete 2 can be accurately recognized from the detection of the pressure. Here, the pressure sensor 4 can be attached by simply inserting it between the horizontal thick pipe and the formwork 1, and therefore, handling is extremely easy and has excellent operability.

Furthermore, since it is arranged outside the formwork 1 and does not protrude into the formwork 1, there is no problem of damaging the concrete surface.

Furthermore, since the filling of concrete is sensed not by the conductivity of the moisture contained in the poured concrete 2 as in the conventional case, but by sensing the pressure, there is no false detection by water sprinkling or the like.

Furthermore, by changing the setting at which the signal of the pressure sensor 4 turns ON, the height (head difference) between the top of the filled concrete 2 where the ON signal is generated from the pressure sensor 4 and the pressure sensor 4 can be adjusted. It is possible to adjust the amount of pouring per three pipe plates depending on the difference in slump value, etc.

Now, FIG. 5 is a side view showing another embodiment of the present invention.

In the figure, a wedge-shaped main body 10 is inserted between the horizontal thick pipe and the formwork 1.
The pipelator 3 is fixed to the outside of the main body 180, and the main body 180 has a built-in pressure sensor 4 and a control section (not shown), and is also provided with a battery, which operates all of the pipelator 3 and the like. therefore,
Since there is no need for a power cord or the like, handling becomes easier, but the same functions and effects as those described above are achieved.

As the pressure sensor 4, in addition to a built-in strain gauge-like sensor, a pressure gauge, a sensor that utilizes the change in electrical resistance due to pressure, and a sensor that utilizes the piezoelectric effect that generates a potential difference due to pressure may be used. Also good.

(Effects of the Invention) As described in detail in the embodiments above, according to the concrete 1/filling site automatic sensing device according to the present invention, the pressure sensor detects the outward pressing force applied to the formwork. Since this pressing force is generated by pouring concrete into the formwork, it is possible to accurately recognize the filling of concrete from pressure detection, and unlike the conductivity of concrete, there is no possibility of false detection due to water spraying, etc. Moreover, since it is placed outside the formwork, there is no inconvenience of damaging the concrete surface, and furthermore, it is extremely easy to handle and has excellent operability. Moreover, since this pressure sensor is sandwiched between the outer surface of the formwork and the horizontal thick pipe facing the outer surface of the formwork, it can be firmly fixed.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing one embodiment of the present invention, and FIG.
3 is a sectional view of FIG. 1 as viewed from the ■ arrow; FIG. 4 is a flowchart of control operation; and FIG. 5 is a side view showing another embodiment to which the present invention is applied. be. 1... Formwork 4... Pressure sensor 6...
horizontal thick pipe

Claims (2)

[Claims] (1) An automatic sensing device for a concrete-filled area, characterized in that a pressure sensor for detecting the pressing force due to concrete filling is placed outside the formwork. (2) The pressure sensor is sandwiched between the outer surface of the formwork and a horizontal thick pipe facing the outer surface of the formwork, and the pressure sensor is provided in contact with the outer surface of the formwork. 2. The automatic sensing device for a concrete filling site according to claim 1.