JPS62174455A - Concrete bucket with vibrator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention 1] [1] The present invention relates to a concrete bucket, and particularly to a concrete bucket integrally equipped with a vibrator.

Buckets are often used for pouring concrete in Hikigi-eki-reinforced concrete work, etc., but especially when pouring tall structures such as columns and walls, long tremie pipes, etc., are used at the lower discharge port of the bucket. The pipes are connected to keep the concrete falling height low and prevent the concrete from separating.

In addition, we use a vibrator to vibrate hardened concrete with particularly low slump so that the concrete moves between the reinforcing bars and into every corner of the formwork, and eliminate air bubbles to obtain dense concrete. .

Conventionally, a bucket was used to place concrete and a vibrator was used to compact the concrete.
The pie break was manually operated while observing the concrete being poured from the bucket.

However, since the effective radius of a vibrator is generally only about 10 times the diameter of the vibrating rod, a large number of vibrators will be required if the driving area is large, and a large number of workers will be required. It becomes necessary.

In addition, it is difficult to turn on/off the pie break switch and to set the timing, and the time the pie break is applied relies on intuition for each tool, making it difficult to obtain the appropriate vibration. There were also problems, such as the fact that the vibrations could become excessive if the switch was turned on, making it difficult to perform proper compaction.

Furthermore, it takes time to move and pull up the pie break, and because multiple vibrators are operated by different tools, vibration operations tend to vary, resulting in non-uniform, low-quality concrete.

The present invention was made to solve the above-mentioned conventional problem α, and its purpose is to compact concrete automatically and efficiently and sufficiently densely and uniformly in both the vertical and transverse directions. To provide a concrete bucket with a pie break that can minimize the strength fluctuation of the frame and avoid excessively increasing the mixed strength of concrete.

[Structure 1 of the invention 11゛, For iLing the concrete bucket with a vibrator of the present invention, a vibrator is attached to the bucket body, and the vibrating part of the vibrator is located below the concrete dropping opening of the bucket. It is characterized by the fact that a sensor is attached to the bucket body or the pie break to detect the dropping of concrete, and the pie break is automatically started or stopped after a predetermined time by a timer. A position sensor detects the surface position of the dropped concrete, and the concrete is automatically started and/or stopped from being dropped from the bucket, and the bucket and vibrator are automatically raised. It is something.

Further, the present invention is characterized in that a chute is attached to the concrete dropping opening of the bucket body, and the pie break is positioned below the tip of the chute.

EMBODIMENT OF THE INVENTION Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a bucket body, which is suspended by a crane (not shown) via a hanging wire 2. In FIG. The lower part of the bucket body 1 is formed into a funnel shape and is vibrated by a vibration motor 3 so that concrete can be dropped smoothly.

Further, an opening/closing plate (not shown) is provided at the lower discharge port of the bucket main body 1, and is driven to open and close by the opening/closing device 4. Reference numeral 5 denotes an opening/closing chain for operating the opening/closing device 4, and is used when opening and closing the opening/closing device 4 with a working tool.

Furthermore, a funnel-shaped lower chute 6 is attached to the lower discharge port of the bucket body 1, and a long cylindrical chute 7 is attached to the lower end of the discharge port. still,
A vibration motor 3 is also attached to the lower chute 6 to ensure that the concrete flows down smoothly.

8 is a pie break, which is detachably attached to the lower chute 6 with a hanging fitting 8a. A vibrating portion 8b is provided at the lower end of the vibrator 8, and vibrates in response to a signal from a high frequency converter 9. Incidentally, by providing the vibrator 8 with a movement and rotation function, it is possible to effectively work every corner with a small number of vibrators.

The vibrator 8 is provided with a sensor 10 along its longitudinal direction as shown in an enlarged view in FIG.

The sensor 10 is composed of a long main electrode 10a, a plurality of sub-electrodes 10b arranged at predetermined height positions, a connecting cable 10c between these electrodes, and the like. The surface of the sensor 10 is treated with Teflon to improve its sliding on concrete.

A controller 11 automatically controls the vibrator 8, the opening/closing device 4, and a lifting device such as a crane based on a command signal from the sensor 10.

Next, concrete pouring work using the concrete bucket of the above embodiment will be explained.

First, concrete mixed appropriately is poured into the bucket body 1, and then the column formwork 1 is placed as shown in Fig. 3 (A).
Lower the lower end opening of the chute 7 to near the bottom of the bucket body 1 (for example, at a height of about 80 cm from the bottom), operate the opening/closing chain 5 to open the lower discharge port of the bucket body 1, and Discharge the concrete C inside.

Concrete C discharged from the bucket body 1 passes through the lower chute 6, flows down into the chute 7, and is poured into the formwork 11 from the opening at its lower end.

When the concrete C starts to be poured, the first sub-electrode 10b attached to the lowermost end of the vibrator 8 comes into contact with the concrete C, senses the concrete C, and starts the vibrator 8.

As the concrete C continues to be dropped, the surface of the concrete C rises and is sensed by contacting the second sub-electrode 10b, as shown in FIG. , close the discharge port, and stop dropping concrete C.

Even if the dropping of concrete C is stopped, the remaining concrete C in the lower chute 6 and chute 7 will further flow down.
The concrete surface rises slightly and is sensed by the third sub-electrode 10b.

Upon sensing by the Pt53 sub-electrode 10b, a bucket lifting device such as a crane is activated, and the bucket rises.
The vibrator 8 integrated with this is pulled up while vibrating. The vibrator 8 is set to vibrate for a predetermined period of time by a timer and then automatically stop.

Alternatively, the vibration may be continued until the paste comes out on the &N of the concrete C by program control, and then the vibrake 8 may be gradually pulled up.

When the vibrator 8 is pulled up and the auxiliary electrode 10b disposed at the lower end of the vibrator 8 is sensed to be separated from the surface of the concrete (C) as shown in FIG. The lifting will be stopped in the remaining state.

After the chute 7 and the vibrator 8 are raised to the state shown in Fig. 3 (C) and stopped, there is a pause period to eliminate the air in the concrete C, and then the concrete shown in Fig. 3 (A) is removed.
Resume the work of dropping C and repeat the above-mentioned work in sequence.

Note that the bucket body 1 is not limited to that of the above embodiment, and may have a structure that allows it to be tipped on its side, or a structure that allows the chute 7 and vibrator 8 to bend, for example, when loading from a mixer truck or the like.

Furthermore, in the above embodiment, the chute is attached to the bucket body, but the chute may not necessarily be attached to beams or slabs, etc. In this case, the pie break should be placed below the concrete dumping opening of the bucket body. position. Note that the pie break may be attached to the chute.

Furthermore, the above-mentioned sensors do not necessarily need to be attached to the vibrator, but may be attached to the bucket body, chute, or the like.

[Effect of the invention 1 (1) Since the vibrator is attached to the bucket body and its vibrating part is located below the concrete dropping opening of the bucket or the tip of the chute, the concrete can be compacted sufficiently densely and homogeneously. As a result, high quality concrete can be obtained.

Therefore, even if the compound strength is low, the design strength can be sufficiently obtained,
Not only is the amount of cement reduced, resulting in a reduction in cost, but it is also possible to prevent the cement from becoming too large and causing the temperature to rise excessively due to the heat generated by water use.

Furthermore, it is possible to reduce labor costs and reduce construction costs.

(2) With the addition of a sensor, not only can concrete be compacted automatically and efficiently, but by combining the sensor with a timer and controller, the pie break can be automatically stopped, the bucket can be raised automatically, and the concrete can be compacted automatically and efficiently.
Operations such as stopping and automatically opening and closing the bucket can be performed automatically and efficiently.

[Brief explanation of drawings]

Fig. 1 is a side view showing an embodiment of the concrete bucket with a vibrator of the present invention, Fig. 2 is an enlarged view showing the configuration of the sensor, and Figs. 3 (A), (B), and (C) are concrete pouring concrete buckets. It is an explanatory diagram of work. 1... Bucket body, 2... Hanging wire, 3...
・Vibration motor, 4... Opening device, 5... Opening/closing chain, 6... Lower chute, 7... Chute, 8
... Pie break, 8a... Hanging bracket, 8b...
Vibrating part, 9... High frequency converter, 10... Sensor, 10a... Main electrode, 10b... Sub-electrode, 10
c... Connection cable, 11... Controller, 12
...Formwork, c-...Concrete.

Claims (7)

[Claims] (1) A concrete bucket with a vibrator, characterized in that a vibrator is attached to the bucket body, and the vibrating part of the vibrator is located below the concrete dropping opening of the bucket body. (2) Sensors detect concrete dropping,
The concrete bucket with a vibrator according to claim 1, wherein the vibrator is automatically activated. (3) The concrete bucket with a vibrator according to claim 2, wherein the automatically started vibrator is stopped after a predetermined time by a timer. (4) The surface position of the concrete being dropped is detected by a position sensor, and the dropping of concrete from the bucket is automatically started and/or stopped. 3
A concrete bucket with a vibrator as described in any of paragraphs. (5) According to any one of claims 1 to 4, the bucket and the vibrator are automatically raised by sensing the surface position of the concrete that has been dropped by a position sensor. Concrete bucket with vibrator as described. (6) A chute for dropping concrete is attached to the bucket body, and the vibrator is positioned below the tip of the chute. Concrete bucket with vibrator as described. (7) The concrete bucket with a vibrator according to any one of claims 1 to 6, wherein a sensor is attached to the vibrator.