JPH0726710A - Form board with concrete filling condition indicator - Google Patents

Abstract

PURPOSE:To monitor the concrete filling condition from the outside. CONSTITUTION:Detection electrodes 3 are fitted to the inside surface 91 of a board member 2 having an outside surface 92 and an inside surface 91 that is in contact with placed concrete so as to be insulated from the board member 2. The insulated conductors 5 connected to the respective detection electrodes 3 are penetrated through the board member 2 and extended up to the positions on the outside surface 92 being opposite to the detection electrodes 3, and each of the conductors 5 is connected to the one end of a continuity detecting element 6 that has been fitted to the position on the outside surface 92 being opposite to the corresponding detection electrode 3. A power supply 22 is connected between the other ends of the respective continuity detecting elements 6 and a reference electrode 7 being in contact with the placed concrete. The filling of concrete between the reference electrode 7 and an arbitrary detection electrode 3 is indicated by the action of the continuity detecting element 6 that has been connected to the arbitrary detection electrode 3. When the continuity detecting element 6 is made of a light emitting diod(LED), the fitting of concrete can be indicated by the light emission of the LED.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a formwork plate with a concrete filling display, and more particularly to a formwork plate with a concrete filling display suitable for so-called top end display of superfluid concrete. So-called super-fluid concrete is concrete having strength and durability that is higher than that of ordinary concrete, and having excellent fluidity (slump flow 55 to 70 cm, slump 24 to 28 cm) and high separation resistance.

[0002]

2. Description of the Related Art Since so-called superfluid concrete has high fluidity, it does not require compaction by an operator's operation, and has been attracting attention from the viewpoint of streamlining work and labor saving. On the other hand, when driving so-called superfluid concrete into the formwork, in order to ensure concrete filling in the formwork,
It was necessary for workers to monitor the flow condition and filling condition of concrete in each part of the formwork. Conventionally, this monitoring is performed by hitting the mold to determine the presence or absence of concrete filling by a response sound, visually observing from outside the mold, or using a transparent mold.

[0003]

However, there is a drawback that special experience and pitching skill are required to carry out the concrete filling condition by the method of hitting the form. The visual monitoring from the outside of the mold has a drawback that it is difficult to observe the inside of the mold plate member directly at the overhang portion, corner portion, edge portion, etc. of the mold. The use of the transparent formwork has the drawback that not only the cost of the formwork itself is increased, but also the use of the formwork is difficult.

Further, when a reinforcing bar having a complicated structure such as the column reinforcing bar 10 shown in FIG. 2 is inside the concrete formwork 1, the flow of the superfluid concrete in the formwork 1 is disturbed, and in a remarkable case, the unfilled part There is also a risk of remaining. In this case, it is necessary to take measures such as emergency tamping or changing the position of the superfluid concrete distibutor. However, it was difficult to detect such a flow disturbance of superfluid concrete with the conventional formwork.

Accordingly, it is an object of the present invention to provide a formwork with a concrete filling indicator that allows the concrete filling condition to be monitored on the outside.

[0006]

[Means for Solving the Problems] Referring to FIG. 1 (A), FIG. 1 (B) and FIG. 1 (C) showing an outer side surface, an inner side surface and a cross section of an embodiment, concrete filling indication according to the present invention Formboard with 9
Is an inner surface 91 that contacts the outer surface 92 and the concrete 20 to be cast.
A plate member 2 having an inner side surface 91, one or more detection electrodes 3 attached to the inner side surface 91 so as to be insulated from the plate member 2, and the plate member 2 connected to each detection electrode 3 to a position facing the detection electrode 3 on the outer side surface 92. An insulated conductor 5 extending through the outer conductor 92, one or more conduction detection elements 6 attached to the detection electrodes 3 on the outer side surface 92 and connected to the insulated conductor 5 at one of the opposite ends at one end, and each conduction detection element. It comprises a power source 22 connected between the other end of 6 and the reference electrode 7 in contact with the concrete to be cast.

The reference electrode 7 can be an object having a ground potential or the metal plate member 2 itself when the metal plate member 2 is used. Preferably, the conduction detecting element 6 is a light emitting diode. When detecting the flow of superfluid concrete, it is necessary to provide a plurality of detection electrodes 3 and a plurality of continuity detection elements 6 on each mold plate 9 with a concrete filling display.

[0008]

The principle of the present invention will be described with reference to FIG. A circuit consisting of a resistance meter 16 and a power source 22 is connected between the two test electrodes 17, 18 arranged in the concrete form 1. Figure 3 (A)
Is the case where the inside of the mold 1 is air, at which time the resistance meter 16 shows a substantially infinite resistance value. FIG. 3 (B) shows a case where the concrete 20 is filled in the mold 1 and the concrete 20 is continuously present between the test electrodes 17 and 18, and at this time, the resistance meter is used.
16 shows a low resistance value. When the concrete 20 is so-called superfluid concrete, the present inventor can ignore the resistance value indicated by the resistance meter 16 when the concrete is filled in FIG. 3 (B) as compared with the value when the concrete is not filled in FIG. 3 (A). Since it is relatively small, it was experimentally confirmed that the presence or absence of filling of the concrete 20 can be judged by the presence or absence of conduction.

In the embodiment of FIG. 1, concrete 20
When (FIG. 2) is filled between the reference electrode 7 which is a ground potential object in this case and any one of the detection electrodes 3, the reference electrode 7 and the one detection electrode 3 have low resistance. Since the concrete 20 is connected, the electric current flows through the continuity detecting element 6 connected to the power source 22 under the condition that the concrete 20 is in contact with the ground, and the continuity detecting element 6 is activated, so that the concrete 20 between the electrodes 7 and 3 is Display filling. Continuity detection element 6
When is a light emitting diode, the filling of the concrete 20 is indicated by the light emitted from the light emitting diode. When the continuity detecting element 6 merely provides a closed contact when the continuity is detected, an indicator light (not shown) or other display means may be connected to the closed contact. It is not a requirement of the invention. By providing at least one detection electrode 3 and the continuity detection element 6 connected thereto, it is possible to detect that the top end of the cast concrete 20 has reached the detection electrode 3 outside the formwork 1. .

In this way, it is possible to achieve the object of the present invention to provide "a formwork plate with a concrete filling display capable of monitoring the concrete filling condition from the outside".

In the illustrated example, since a large number of detection electrodes 3 and the continuity detection element 6 connected thereto are provided, the mold 1
The filling condition of concrete 20 such as superfluid concrete in the inside, especially its flowing condition, can be monitored at the position of the mold 1 by the output of the continuity detecting element 6, for example, the light emission from the light emitting diode.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, the detection electrode 3 is attached to the plate member 2 via the insulating sheet 4, but when the plate member 2 is an insulating material such as wood, the insulating sheet 4 may be omitted. Is also possible. Symbol 8 in FIG. 1 indicates a lead wire between the power source 22 and the continuity detecting element 6 and the reference electrode 7.

FIG. 2 shows an example of assembling a mold 1 in which a reinforcing bar 10 for a column is included, using a conventional mold plate member 2 and a mold plate 9 with a concrete filling display according to the present invention. That is,
The mold frame plate 9 with a display of the present invention is used only in a portion where the flow of the concrete 20 cast into the mold 1 may be disturbed. In this example, the continuity detecting element 6 is a light emitting diode so that the worker 14 can visually monitor it. The outer surface 92 of the form board 9 with the display by the TV camera 12
It is also possible to remotely monitor the above display.

Furthermore, if a plurality of pairs of detection electrodes 3 and conduction detection elements 6 are used for each form board 9 with a display and their outputs are collected and monitored in an appropriate control panel (not shown), the inside of the form 1 It is possible to grasp the flow condition of concrete 20 such as superfluid concrete in real time. Also, concrete 20
It is also conceivable to take necessary measures when there is an abnormality in the flow of, for example, automatically control the movement of the position of the distributor of superfluid concrete.

FIG. 4 shows a conceptual flow chart of automatic control of the concrete distributor based on the grasp of the concrete flow condition. That is, in step 51, the concrete filling condition in the specific form is grasped as described above. Step 52 determines whether the flow of concrete 20 is turbulent enough to require distributor movement. If there is such a disturbance, proceed to step 53, select an appropriate concrete pouring position, move the distributor to the mold 1 at the selected position in step 54, and then return to step 51 to monitor the concrete filling condition. Inject 20. When there is no such disturbance, the routine proceeds to step 55, where it is judged whether or not the filling of the concrete 20 is completed. When the filling is not completed, the process returns to step 51 and the concrete pouring is continued until the filling is completed. When the specified concrete filling is completed in the mold 1 being monitored, it is judged in step 56 whether the mold 1 is the final one, and if it is not the final, the next concrete feeding position is stepped. Select in 57, move the distributor to the mold 1 in the selected position in step 58, and then return to step 51 to monitor the filling status and concrete.
Inject 20. If it is determined in step 56 that the mold is the final form 1, the control ends. According to the method of FIG.
It can be expected to develop the unmanned technology for the placing work including the treatment against the turbulence of the superfluid concrete flow.

[0016]

As described in detail above, the formwork plate with a concrete filling display according to the present invention provides a real-time display of concrete filling by the conduction detecting element on the outer surface connected to the detecting electrode on the inner surface of the plate member. Therefore, the following remarkable effects are obtained.

(A) It is possible to detect a change in the top end of concrete in a mold according to the progress of casting without any time delay, without requiring visual observation inside the mold. (B) If the conduction detecting element is a light emitting element such as a light emitting diode, the concrete filling condition in the mold can be visually observed outside the mold. (C) By using a plurality of pairs of detection electrodes and continuity detection elements, it is possible to monitor and grasp the flow condition of concrete in the mold, particularly superfluid concrete. (D) Real-time detection of anomalies in the concrete flow in the formwork and the necessary measures can be taken without delay,
High quality concrete can be placed. (E) On-line monitoring of superfluid concrete pouring, automatic control of concrete distributor based on it, and unmanned construction site can be expected.

[Brief description of drawings]

FIG. 1 is a view showing an outer surface, an inner surface and a cross section of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of an application example of the present invention.

FIG. 3 is a circuit diagram illustrating the principle of the present invention.

FIG. 4 is a conceptual flow diagram of automatic control utilizing the present invention.

[Explanation of symbols]

1 Concrete formwork 2 Plate member 3
Detection electrode 4 Insulation sheet 5 Insulated conductor 6
Continuity detection element 7 Reference electrode 8 Lead wire 9 Form plate with concrete filling display 10
Column rebar 12 TV camera 14 Worker 16
Resistance meter 17, 18 Test electrode 20 Concrete 22
Power 91 Inner side 92 Outer side.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuhiko Abe 2-19-1 Tobita-cho, Chofu-shi, Tokyo Inside Kashima Construction Co., Ltd. (72) Inventor Ken Saito 2-19-1 Tobita-cho, Chofu-shi, Tokyo Kashima Construction Co., Ltd. Technical Research Center

Claims (3)

[Claims] 1. A plate member having an outer surface and an inner surface in contact with the concrete to be cast, one or more detection electrodes attached to the inner surface so as to be insulated from the plate member, and connected to each of the detection electrodes. An insulated conductor that extends through the plate member to a position facing the detection electrode on the outer side surface, is attached to the detection electrode facing position on the outer surface and is connected to the insulated conductor at the facing position at one end. The above-mentioned continuity detecting element, and a power source connected between the other end of each of the continuity detecting elements and a reference electrode in contact with the concrete to be cast, and a power source connected between the reference electrode and the one detection electrode. A mold plate with a concrete filling display, which indicates the concrete filling by the operation of the continuity detecting element connected to the detection electrode. 2. The formwork plate with a concrete filling display according to claim 1, wherein the plate member is made of metal and the reference electrode is the metal plate member. 3. The mold plate with a display according to claim 1 or 2, wherein the continuity detecting element is a light emitting diode.