JPH07189488A - Compactor for concrete - Google Patents

Abstract

PURPOSE:To save labor, and to improve quality by bearing a vibrator to a float floating on placed concrete. CONSTITUTION:Vibrators 11, on which floats 16 are mounted previously, are dropped into a placing space S from the inspection windows 4 of an inner mold 1. When concrete C is placed into the placing space S, the vibrators 11 are elevated together with the floats 16. The vibrators 11 are driven at optimum time intervals by a control section through wiring cables 14, and concrete C is excited and compacted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete compacting device for compacting concrete placed in a mold, and more particularly to a concrete compacting device suitable for use in lining a tunnel. It is a thing.

[0002]

2. Description of the Related Art Conventionally, for example, when compacting concrete when lining a tunnel, an operator installs a rod-shaped vibrator in the concrete that is placed between the primary lining surface of the tunnel and the inner formwork. It is carried out by inserting and vibrating concrete with the vibrator. For the work of moving the vibrator and the operation of the operation switch of the vibrator, 1
Workers by name were involved.

[0003]

However, in the above-described conventional method for compacting concrete, two workers are required for one bar-shaped vibrator, and in particular, the long and large frame construction method using a large number of vibrators is used. A large number of workers had to be secured during the lining of tunnels. Further, the vibrating work of concrete by a vibrator is a bitter juice work in a limited space in the formwork, and there is also a problem that it requires skill. Particularly, it is important to adjust the pouring speed of concrete and the working time of compaction, and there is also a problem that the degree of compaction of concrete varies depending on the skill of the worker.

It is an object of the present invention to provide a concrete compaction device which enables automation of concrete compaction work, labor saving of compaction work, and improvement of quality.

[0005]

SUMMARY OF THE INVENTION A concrete compacting device of the present invention is a concrete compacting device for compacting concrete cast in a mold, in which concrete is cast on the concrete. It is characterized by comprising a float and a vibrator which is supported by the float and vibrates.

[0006]

The concrete compacting apparatus of the present invention supports the vibrator on a float that floats on the concrete to be placed, whereby the vibrator is automatically raised in accordance with the progress of the concrete placing work, and the concrete is compacted. It is possible to automate the compaction work of
And improve quality.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. This embodiment is an example of application as a concrete compaction device used for lining a tunnel by a long and large frame method. In FIG. 1, reference numeral 1 denotes an inner mold, and this inner mold 1
A space S for placing concrete is formed between the above and the primary lining surface 2 of the tunnel, and by placing concrete C in the space S, the tunnel is subjected to so-called secondary lining. Concrete C, as shown in FIG.
It is thrown into the space S from a plurality of throw ports 3 arranged in the longitudinal direction of the tunnel. In FIG. 3, 4 is an inspection window formed in the inner mold 1 and 5 is a water stop plate.

As shown in FIG. 4, the compaction device of this embodiment includes a control panel 12 to which a plurality of rod-shaped electric vibrators 11 are connected, and the control panel 12 is supplied from a converter 13. The vibrator 11 is drive-controlled by three-phase alternating current as described later. The wiring cable 14 between the control panel 12 and the vibrator 11 is adapted to be appropriately wound by a cable reel 15. This cable reel 15 automatically winds the wiring cable 14 by a force such as a mainspring so as to eliminate the slack in the portion of the wiring cable 14 between the cable reel 15 and the vibrator 11. It is composed. A float 16 (see FIG. 1) is attached to the upper end of the vibrator 11. This float 16
Is the concrete C with the vibrator 11 suspended.
The weight and shape are set so that it floats sufficiently above.

A plurality of control units 20 (see FIG. 5) corresponding to the number of vibrators 11 are formed in the control panel 12, and the vibrators 11 corresponding thereto are individually controlled by these control units 20. It In each control unit 20, SX is an electromagnetic switch for opening and closing the power supply circuit of the corresponding vibrator 11, and has three contacts corresponding to three-phase alternating current as shown in FIG.
The drive circuit of this electromagnetic switch SX includes a timer switch T2 of a twin timer (hereinafter referred to as "second timer") T2.
-S is connected, and the power circuit of the second timer T2 has a multi-timer (hereinafter referred to as "first timer") T1.
Timer switch T1-S is connected.

These timers T1 and T2 are set with ON and OFF times by workers, respectively, and their functions will be described later together with their actions. A manually operated snap switch SP is connected in parallel to the timer switch T2-S. This snap switch SP is turned off when the vibrator 11 is automatically operated.
Operated. Further, in FIG. 5, GL is an electromagnetic switch S
Pilot lamp, RL for checking the operating state of X
Is a pilot lamp for confirming the power supply state of the control unit 20.

Next, the operation will be described. First, FIG.
As shown in, the vibrator 11 is dropped into the space S from the inspection window 4 of the inner mold 1. The float 16 is attached to the vibrator 11 in advance. Cable reel 15
Is installed at a fixed position inside the inspection window 4, and the wiring cable 1 between the cable reel 15 and the vibrator 11 is installed.
The portion 4 is guided by a roller (see FIG. 1) 17 located near the inspection window 4.

Before and after the setting of the vibrator 11, the timers T1 and T2 are set. First timer T
1 is ON, OF for setting the operable time of the vibrator 11 (hereinafter referred to as "operable time t0")
The F timer and the second timer T2 are ON for setting the intermittent operation timing of the vibrator 11 during the operable time t0, that is, the time t1 and t2 for the operation and suspension of the vibrator 11 that is repeated during the operable time t0. It is an OFF timer, and such timers T1, T
2, depending on the placing speed of concrete C, etc.
The operating time of each vibrator 11 is optimally and individually set.

In the control unit 20, the snap switch SP is turned on.
In the FF operated automatic operation state, the set times t0, t1, t2 of the timers T1, T2 set in this way are set.
The vibrator 11 is driven and controlled in accordance with the above. That is,
During the operable time t0, the timer switch T1-S is turned on, and during the operable time t0, the operating time t1
Only during the period, the timer switch T1-S is turned on, the electromagnetic switch SX is turned on, and the vibrator 11 is operated for the operation time t1.

On the other hand, the float 16 mounted on the upper end of the vibrator 11 is a concrete C that is placed in the space S.
Since it floats up, the vibrator 11 ascends together with the float 16 as the work of placing the concrete C progresses. Therefore, the vibrator 11 vibrates the concrete C at an optimum time interval while automatically rising according to the pouring speed of the concrete C, and appropriately compacts it. Further, the cable reel 15 automatically winds the wiring cable 14 so as to absorb the slack of the wiring cable 14 caused by the rise of the vibrator 11. Therefore, as shown in FIG. 3, slack does not occur in the wiring cable 14 regardless of how much the vibrator 11 rises.

As described above, for example, by automatically operating the twelve vibrators 11, the tunnel 1
It becomes possible for one worker to perform concrete compaction work in a long and large frame for 8 m. Further, by turning on the snap switch SP, the corresponding vibrator 11 can be appropriately operated regardless of the set times of the timers T1 and T2.

[0016]

As described above, since the concrete compacting device of the present invention has a structure in which the vibrator is supported by a float that floats on the concrete to be placed, it can be adjusted according to the progress of the concrete placing work. The vibrator can be automatically raised, and as a result, the compaction work of concrete can be automated, and the compaction work can be labor-saving and the quality can be improved.

[Brief description of drawings]

FIG. 1 is a transverse cross-sectional view of a tunnel to be lined using a compaction device according to an embodiment of the present invention at the time of initial concrete compaction.

FIG. 2 is a cross-sectional view of the tunnel shown in FIG. 1 at the time of launching concrete.

3 is a vertical cross-sectional view of the tunnel shown in FIG.

4 is a wiring diagram of the compaction device shown in FIG. 1. FIG.

5 is a circuit diagram configuration diagram of a main part of the control panel shown in FIG. 4. FIG.

6 is a circuit configuration diagram of the electromagnetic switch shown in FIG.

[Explanation of symbols]

 1 Inner formwork 2 Primary lining surface 3 Concrete input port 11 Vibrator 12 Control panel 13 Converter 14 Wiring cable 15 Cable reel 16 Float 17 Roller S Placing space

 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Fumio Nishi 2--10-10 Fujimi, Chiyoda-ku, Tokyo Maeda Construction Industry Co., Ltd. Address within Gifu Industry Co., Ltd.

Claims (2)

[Claims] 1. A concrete compaction device for compacting concrete cast in a mold, comprising: a float on the concrete cast in the mold; and a vibrator vibrating while being supported by the float. A compaction device for concrete characterized by being provided. 2. The concrete compaction device according to claim 1, wherein the vibrator is provided with a timer for setting an operating time of the vibrator.