JPS6366643B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a concrete charging device used in a concrete secondary product forming line by pouring.

When manufacturing revetment blocks (hereinafter simply referred to as blocks) by conventional pouring, the concrete (cement concrete that has not hardened yet) is poured into the formwork by a worker who operates a handle or pushbutton while monitoring the feeding situation. This was done by operating the loading device. For this reason, workers had to work for long periods of time in a harsh environment with heavy dust and noise, which was not desirable in terms of labor saving. In addition, in a block forming device that uses instant demolding, a movable hopper consisting of a partition plate connected to the rear upper edge of a short cylindrical body having the same dimensions as the lower opening of the hopper is placed between the hopper and the upper part of the formwork. There is a device that automatically feeds concrete into formwork by moving it back and forth between the movable hopper and various parts, and various attempts have been made to use this device directly for pouring, but there are long gaps between the movable hopper and each part. Due to the presence of the hopper and the pressure exerted by the weight of all the concrete in the hopper, a large amount of water and concrete leaked from the above-mentioned gaps, resulting in failure.

This invention solves the above-mentioned conventional drawbacks,
The purpose of the present invention is to provide a concrete charging device that can perform unattended concrete charging in pouring molding and has less leakage of concrete and water.

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is a concrete charging device, 2 is a machine frame which is its base, and 3 is a hopper fixed to this machine frame. Reference numeral 4 designates four screw feeders connected to the outlet of the hopper 3, and reference numeral 5 designates four geared motors that drive the screw feeders in a chain. Reference numeral 6 denotes a square support frame, which is elastically supported on the machine frame 2 via anti-vibration rubber 7. 8 is a small hopper that is fixed to the frame of this machine in four rows, and each screw feeder 4
It has an outlet 10 disposed below the outlet of the mold and communicates with the upper opening 9a of the formwork 9 at its lower part. A guide 11 is fixed around the outlet 10 and is used to guide and position the upper end of the formwork 9. Note that since the upper end surface of the formwork 9 is pressed against the lower surface of the small hopper 8 surrounded by the guide 11, it is desirable to provide a sealing material such as a square ring-shaped rubber seal. The small hopper 8 has a main body 15 formed by welding flat semi-conical side plates 12, 12, an end plate 13, and a bottom plate 14 partially curved into an arc shape, and has edges that slide on each of the side plates and the bottom plate. It is provided with a trapezoidal plate-shaped rotatable lid 16 having a rubber blade 17 in contact with it.
The arm 18 fixed to this lid has a bearing 1 on the support frame 6.
A lever 21 is fixed to a drive shaft 20 rotatably mounted via a lever 9, and a lever 21 is fixed to both ends of the drive shaft.
is connected to a piston rod of an air cylinder 22 attached to the machine frame 2. 23 is a level detector attached to the small hopper 8, and its detection end 23a is located a short distance above the outlet 10. On the other hand 25
26 is a straight bar-shaped guide whose upper and lower ends are fixed to the machine frame 2, 26 is a guide shoe that can be raised and lowered freely guided by this guide, 27 is a cross beam that is elastically attached to this guide shoe via anti-vibration rubber 28, and 29 is a crossbeam. A vibration rod 30 is a vibrator attached to the cross beam 27, which is vertically fixed to the cross beam. A chain 34 is wound between a lower chain wheel 31 pivotally supported on the machine frame 2 near each guide 25 and an upper chain wheel 33 fixed to a shaft 32 rotatably attached to the machine frame 2. Arms 35 protruding from each guide shoe 26 are connected to this chain. 36 is a motor with a reduction gear that drives the shaft 32 in a chain manner. Further, 37 is a known vibration table on which the formwork 9 is placed and moves up and down to apply vibrations.

In order to charge concrete with the device having the above configuration, a conveyor 40 (not shown in detail) is used.
The four molds 9 are placed on the vibration table 37, and the table is raised to press the upper end of the molds 9 into contact with each small hopper 8, thereby communicating the upper opening 9a of the mold with the outlet 10. At the same time, the vibration table 3
7, the formwork 9 and the small hopper 8 are formed through the formwork.
Excite. The screw feeder 4 is operated by the geared motor 5 with the lid 16 fully open as shown by the solid line, and the muddy concrete is poured into the small hopper 8.
If the concrete is poured into each outlet 10
It is then filled into each formwork 9. At this time, the motor with reducer 36 and the vibrator 30 are operated to
And if this is lowered by the integrated vibrating rod 29,
The vibration rod 29 is inserted into the formwork 9 to improve the vibration compaction effect of concrete. When the top surface of the concrete reaches a position a short distance above the outlet 10, the level detector 23 issues a signal, which causes the screw feeder 4 to stop, the vibration rod 29 to rise, and the air cylinder 22 to move the drive shaft 20. The lid 16 is rotated to the closed position as shown by the chain line, and excess concrete on the outlet 10 is scraped off. The vibration of the formwork 9 by the vibration table 37 is stopped, the formwork 9 is lowered, and a new small hopper 8 of the formwork is created.
As the concrete is charged downward, the formwork into which concrete has been charged is pushed out onto the conveyor 41 and transported to the next process equipment, and the same charging process is repeated thereafter. When the lid 16 is closed, the surplus concrete remaining in the small hopper 8 is poured into the mold together with new concrete by opening the lid 16 after the next mold is raised.

To prevent this, the lid 16 is kept open when concrete is poured into the screw feeder 4, and the level detector 23 detects when the level of concrete in the small hopper 8 has reached a predetermined short distance above the outlet 10 of the small hopper. Detected by screw feeder 4
Since the concrete from the screw feeder 4 is almost directly poured into the formwork 9, the degree of solidification of the concrete in the small hopper 8 is extremely small, and the slump is about 2 to 3. Concrete can also be poured smoothly.

In the above embodiment, the elevating vibration rod 29
This has the advantage that even in the case of concrete with a small slump, it is possible to reliably prevent accidents such as concrete clogging the small hopper 8 and preventing it from falling into the formwork 9. For example, in the case of slump: 12-13) concrete, the vibrating rod 29 can be omitted, and in this case, the configuration of the charging device can be simplified and manufactured at low cost.

The present invention is not limited to the above embodiment, and for example, other types of feeders such as a vibration feeder or a roll feeder may be used instead of the screw feeder 4, and the lid 16 may be moved horizontally to A small hopper having a configuration other than the above may be used, such as opening and closing the outlet 10.

Although the present invention has been described above in the case where it is applied to a concrete charging device for forming revetment blocks, the present invention can also be applied to concrete charging devices for forming secondary concrete products other than revetment blocks.

As explained above, according to the present invention, a small hopper that communicates with the formwork is provided below the outlet of the feeder that feeds the concrete in the hopper, and the level of concrete poured into the formwork through this hopper is adjusted to The feeder is stopped when the level detector detects when the formwork has been filled and reached a predetermined short distance above the outlet of the small hopper, ensuring that the formwork is filled with just the right amount of concrete. , concrete can be poured unmanned,
Labor saving can be achieved. In addition, the concrete charging device of this invention has a simple configuration consisting of a combination of a small hopper and a level detector, so equipment costs are low, and there is no need for troublesome adjustment work when changing the internal volume of the formwork, so it can be used as is. It doesn't take much time. Furthermore, since the concrete from the feeder is almost directly poured into the formwork, the extent to which the concrete solidifies in the small hopper is extremely small, and even concrete with a slump of about 2 to 3 can be poured smoothly. Further, since the amount of concrete temporarily stored in the small hopper is small and no pressure is applied due to the total amount of concrete in the hopper, there is little leakage of concrete or water in the small hopper.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view of a concrete charging device showing an embodiment of the present invention, and FIG. 2 is a sectional view taken along line A--A in FIG. 1. 1... Concrete charging device, 3... Hopper,
4... Screw feeder, 5... Geared motor, 8... Small hopper, 9... Formwork, 10... Outlet, 16... Lid, 17... Rubber blade, 22...
...Air cylinder, 23...Level detector.

Claims (1)

[Claims] 1. A hopper, a feeder connected to the outlet of the hopper, and a small hopper provided with an outlet disposed below the outlet of the feeder and communicating with the upper opening of the formwork, and a lid for opening and closing the outlet. and a level detector attached to the hopper with a detection end located a predetermined short distance above the outlet, and the feeder is operated in response to a level detection signal generated by the level detector when the lid is open. A concrete pouring device characterized in that it is stopped.