JPH0219220Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a casting machine for high-strength hard mixed concrete with a slump of approximately 3 to 5 cm. Immediately before placing the concrete, a fluidizing agent is mixed in to give it fluidity, and then the concrete is placed. This invention relates to a hard mixing concrete pouring machine that automatically performs compaction and reliably places concrete of uniform quality.

High-strength precast concrete members manufactured in a precast concrete manufacturing factory or girder manufacturing yard are manufactured from hard mixed concrete with a small water-cement ratio and a slump of about 3 to 5 cm.

Hard-mixed concrete with a small slump has poor fluidity in the unhardened state, and in order to obtain a high-quality product, great care must be taken when pouring the concrete, and careful compaction that matches the concrete pouring conditions is required. as an essential requirement,
The effort involved is enormous.

Additionally, in the past, it was unavoidable that concrete placement would be placed too early or too late compared to compaction work due to disturbances caused by fluctuations in the supply of concrete, etc. In the case of concrete, it has not always been easy to obtain finished concrete of uniform quality.

This invention improves the fluidity of hard-mixed concrete for a short period of time by quickly and uniformly mixing an appropriate amount of fluidizing agent, etc. into the concrete just before pouring, improves the fluidity of hard mixed concrete for a short period of time, and then pours the concrete. Appropriate compaction is performed during the high-temperature period to obtain a high-quality product.The mechanisms that make these operations are installed together on a traveling framework, and each function works organically and cooperatively as a concrete pouring machine. The purpose is to solve the above problems.

That is, the present invention includes a concrete receiving hopper, a variable speed feeder provided at the bottom of the hopper,
an additive addition device interlocked with the variable speed feeder;
a hardening device that mixes the additive into concrete and then puts the concrete into a form; a flexible vibrator that compacts the poured concrete;
It consists of a lifting device that lifts and lowers the vibrator, and a traveling framework on which all of these are attached, and cooperatively controls the traveling speed of the framework, the amount of concrete delivered by the variable speed feeder, the amount of additive added, the lifting and lowering of the vibrator, and the compaction operation. This is a hard mixed concrete pouring machine characterized by being equipped with a control device that

Embodiments of the present invention will be described in detail below with reference to the drawings.

Figure 1 is a side view of the device of the present invention, Figure 2 is a front view (viewed from arrow A-A in Figure 1), Figure 3 is a rear view (viewed from arrow B-B in Figure 1), and Figure 4 is a rear view (viewed from arrow B-B in Figure 1). The figure is a rear view of another embodiment.

The hard mixed concrete pouring machine 1 of the present invention is mainly used for concrete pouring of precast high-strength concrete members manufactured in factories or girder manufacturing yards, and is used to place formwork above the formwork of such concrete members. It is installed so that it can be straddled and run freely.

A hopper 2 receives hard mixed concrete hardened in a batcher plant (not shown), and a variable speed feeder 3 discharges this concrete to the bottom of the hopper 2.
Equipped with The hopper 2 has a capacity that is compatible with the capacity of the batcher plant in the previous process (not shown) and the concrete placement conditions of the product. Consideration has been given to the slope and the aperture at the bottom.

The variable speed feeder 3 at the bottom of the hopper feeds the amount of concrete from the hopper 2 that matches the required concrete placing speed, and in the embodiment shown in FIG. The number of rotations can be arbitrarily changed by a variable speed motor 5 to appropriately change the amount of concrete delivered.

An additive adding device 6 is provided at the outlet side end of the feeder 3.

In addition to fluidizing agents, additives that are added to concrete later, such as water reducers and hardening retarders, can be added. The additive adding device 6 is of any type, but it is a device that works in conjunction with the feed rate of the feeder 2 and adds a fixed ratio to the amount of concrete fed from the hopper 2. In the case of liquid additives, it is preferable to use an atomization device, which is equipped with a tank 6a, a pump 6b, a flow rate adjustment device 6c, a spray nozzle 6d, etc., and is extremely easy to mix in the subsequent process, making it easy to obtain homogeneous mixing.

The hardening device 4 is a device for quickly hardening concrete to which additives have been added, and in the embodiment shown in FIG. 1, it is a paddle wheel type device equipped with a large number of hardening blades. This hardening equipment is required to quickly and uniformly mix additives into concrete. For example, if the concrete is mixed homogeneously by hardening for about 10 seconds after mixing the plasticizer and then poured into the formwork, this concrete will maintain good fluidity for about 30 minutes, but the hardening time will be 60 seconds. If it is about seconds, the effect of the superplasticizer will be lost in 10 to 15 minutes.

The hardening device 4 shown in FIG.
It is provided coaxially with the motor 5 and is driven by the same variable speed motor 5. Of course, it is possible to separate the variable speed feeder 3 and the hardening device 4, but by appropriately designing it for high-strength concrete, it is possible to combine the hardening device and the variable speed feeder as shown in Fig. 1. It is preferable to create a compact, high-performance, inexpensive device that occupies a small space and can be coaxially integrated. The concrete discharge port of the hardening device 4 may be provided with a distribution chute such as a swing chute.

Next, as shown in FIG. 3, the concrete pouring machine of the present invention is equipped with a flexible vibrator 11 on the back side of the traveling framework 7, a vibrator mounting frame 12 for holding the vibrator, a device 13 for lifting and lowering the frame 12, The vibrator is raised and lowered by a lifting device such as a vibrator lifting motor 14, and the concrete placed by the hardening device 4 is rapidly compacted according to the placing speed. Fourth
The figure shows a rear view of another embodiment of the present invention, and also shows the relative positions of two vibrators 11, concrete products 21, formwork 22, etc. Further, a state in which the vibrator mounting frame 12 is lowered is shown by a virtual line 12a. The vibrator 11 used in the present invention is preferably a rod-shaped flexible vibrator whose vibrating part is inserted into concrete. Further, the number of vibrators 11 to be used can be arranged in any arbitrary arrangement in the front and back, left and right, depending on the scale of the concrete product. Raising and lowering the vibrator,
Compaction operations are performed in response to the concrete placement speed.

The above-mentioned hopper 2, feeder 3, additive addition device 6, hardening device 4, vibrator 11, and elevating devices 12, 13, and 14 are mounted on the formwork 22 of the precast concrete member 21. The traveling framework 7 is mounted on a framework 7, and is equipped with wheels 8 and a traveling motor (see FIG. 1), and travels on rails 10 along concrete forms 22.

Furthermore, the concrete feeding machine of the present invention can control the traveling speed of the traveling framework, the amount of concrete delivered by the variable speed feeder, the amount of additive added, the vertical movement of the vibrator, and the time schedule of its compaction operation in the most appropriate manner. The control device is equipped with a control device. FIG. 5 is a system diagram schematically showing this control system. This control device may be a device that aggregates the individual controllers of each of the devices and manually sets the setting values of each device, or of course, it can easily be an automatic control device that links these devices. be.

The hard-mixed concrete pouring machine of this invention gives fluidity to concrete with low slump in a short period of time just before pouring, and performs appropriate compaction immediately after pouring, so it always produces high-strength concrete products of the same quality. It is also labor-saving and economical.

[Brief explanation of drawings]

Fig. 1 is a side view of the embodiment of the present invention, Fig. 2 is a front view (A-A arrow view), Fig. 3 is a rear view (B-B arrow view in Fig. 1), and Fig. 4 is a side view of the embodiment of the present invention. The figure is a rear view of another embodiment, and FIG. 5 is a system diagram schematically showing the control system. 1... Hard mixing concrete charging machine, 2... Hopper, 3... Feeder, 4... Hard mixing device, 5...
Variable speed motor, 6... Additive addition device, 7... Traveling framework, 8... Wheels, 9... Traveling motor, 10
...Rail, 11...Flexible vibrator, 12,1
3, 14... Vibrator lifting device, 15... Control device, 21... Precast concrete member, 22... Formwork.

Claims (1)

[Scope of utility model registration request] A concrete receiving hopper, a variable speed feeder provided at the bottom of the hopper, an additive addition device linked to the variable speed feeder, and a mixing device that mixes the additive into concrete and then feeds the concrete into the formwork. It consists of a flexible vibrator that compacts the poured concrete, a lifting device that raises and lowers the vibrator, and a traveling framework to which all of these are attached, and the traveling speed of the framework, the amount of concrete delivered by the variable speed feeder, and the additives. amount of addition,
A hard mixing concrete pouring machine characterized by being equipped with a control device that coordinately controls the lifting and lowering of a vibrator and the compaction operation.