JPS6114962Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid filling device suitable for equipping a molding and filling machine.

It is desirable for this type of liquid filling device to be able to simultaneously fill a uniform amount of liquid such as milk into a large number of containers formed on a resin film using a molding and filling machine. This is because by intermittently filling a large number of containers, the speed of forming, filling and packaging can be increased (higher efficiency).

However, since these containers must always be filled with a certain amount of liquid accurately, so-called volumetric type containers are preferable, but such conventional liquid filling devices must be equipped with a large number of metering mechanisms. However, it became extremely large and had the problem of being uneconomical.

In order to solve this problem, a liquid filling device was provided by the present applicant in Japanese Patent Application No. 138287/1987, but this device pressurizes the inside of the liquid tank and uses this pressure to fill the liquid into the cylinder. Since the liquid is ejected at the same time, there is a problem that variations occur in the amount of liquid filled, and it becomes complicated to adjust the stopper to eliminate this variation. Moreover, due to pressurization, liquid leakage occurred between the switching valve and the bottom wall.

Therefore, an object of the present invention is to provide a liquid filling device in which the stopper can be easily adjusted and liquid does not leak.

In the present invention, a cylinder tube is provided in a liquid tank that can be sealed with a lid, the inside of the cylinder tube is connected to a liquid filling passage formed on the bottom wall of the tank, and a piston is movably provided in the cylinder tube. In a liquid filling device, a supply passage is formed in the bottom wall of the tank adjacent to the filling passage, and the liquid filling passage and the supply passage can be selectively communicated with each other by a switching valve provided on the bottom wall of the tank. A sealing groove is formed in the upper edge of the side wall of the liquid tank, a sealing liquid is filled in the sealing groove, the lid is movably provided on the upper part of the liquid tank, and the piston is fixed to the lid. , the lid is provided with a sealing plate that extends downward and enters the sealing liquid in the sealing groove.

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

In FIG. 1, an embodiment of a liquid filling device according to the invention is illustrated. A liquid filling device 1 according to this embodiment includes a tank 10 whose interior is filled with a liquid to be filled and maintained at atmospheric pressure.
have. A plurality of filling passages 12 are formed through the bottom wall 11 of the tank so as to communicate inside and outside the tank, and a nozzle 13 is formed at the lower end of each filling passage. A circular valve hole 14 is further formed in the bottom wall 11 in the middle of each filling passage 12, and the valve hole 14 is connected to a supply passage 15 formed in the bottom wall in parallel with the filling passage.
It communicates with

A valve body 21 of a switching valve 20 is rotatably inserted into each valve hole 14, and the valve body is formed with a through hole 22 penetrating approximately in the diametrical direction and a notch 23 on the outer periphery. . This through hole 22 is connected to the second valve body 21.
When the valve body is in the position shown in Figure 1, the notch 23 acts to communicate with the upper part 12a and lower part 12b of the filling passage when the valve body is in the position shown in Figure 1. The upper portion 12a and the supply passage 15 can communicate with each other.

Inside the tank 10, cylinder tubes 31 of metering cylinders 30 are arranged and fixed via connectors 32 at positions corresponding to the respective filling passages 12. The interior of the cylinder tube 31, that is, the cylinder chamber 33, communicates with the upper portion 12a of the filling passage 12 via a through hole 34 formed in the connector 32. Inside each cylinder tube 31 is a piston 35.
is movably inserted therein, and its piston is fixed to a lid 16 provided on the top of the tank so as to be movable up and down by an external drive device.

A sealing plate 161 is provided around the lid 16 to protrude downward, and this sealing plate is placed in a sealing groove 18 formed around the entire upper edge of the side wall 17 of the tank 10. A sterilizing liquid l such as alcoholic hydrogen peroxide is contained in the sealing groove 18 as a sealing liquid, thereby preventing bacteria from entering the tank from the outside.

40 is a pipe that introduces clean air into the tank 10, and 41 is a pipe that supplies liquid into the tank. The inside of the tank 10 is sterilized by clean air supplied from the pipe 40.

In the liquid filling device having the above configuration, the switching valve 20
When the valve body 21 is rotated to the position shown in FIG.
5. The filling passage 12 is communicated with the cylinder chamber 33 via the upper portion 12a. After that, when the lid 16 is pulled up by an external drive device, the piston is also pulled up, and liquid is introduced into the cylinder chamber 33.
Since the upper limit position of the piston 35 is regulated by an external drive device, a predetermined amount is introduced into the cylinder chamber 33. That is, the liquid is metered.

Next, when the valve body 21 of the switching valve 20 is rotated to the angular position shown in FIG.
2 to the atmosphere. Therefore, lid 1
When the piston 35 is pushed down by pushing down the cylinder 6 by an external drive device, the liquid in the cylinder chamber 33 is discharged into the container c, and the cylinder is accurately filled with the measured amount of liquid.

As described above, in the liquid filling device according to the present invention, the piston is operated reliably by the external drive device through the lid, so there is no variation in the filling amount, there is no liquid leakage, and there is no need to worry about liquid leakage. Since it is isolated from the outside by a liquid seal using a sterilizing liquid, there is no fear of contamination of bacteria into the liquid.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of a liquid filling device according to the present invention, and FIG. 2 is a partial view of FIG. 1, showing different operating states. 1: Liquid filling device, 10: Tank, 11: Bottom wall, 12: Filling passage, 15: Supply passage, 20: Switching valve, 21: Valve body, 30: Measuring cylinder, 31:
Cylinder tube, 34: passage, 35: piston, 16: lid.

Claims (1)

[Scope of utility model registration request] A cylinder tube is provided in a liquid tank that can be sealed with a lid, and the inside of the cylinder tube is connected to a liquid filling passage formed in the bottom wall of the tank. A piston is movably provided in the cylinder tube, and In a liquid filling device in which a supply passage is formed in a wall adjacent to the filling passage, and the liquid filling passage and the supply passage can be selectively communicated with each other by a switching valve provided on the bottom wall of the tank, a side wall of the liquid tank is provided. A sealing groove is formed in the upper edge, a sealing liquid is filled in the sealing groove, the lid is provided on the upper part of the liquid tank so as to be movable relative to the piston, and the piston is fixed to the lid. A liquid filling device characterized in that a seal plate is provided that extends downward and enters the seal liquid in the seal groove.