JPS6112833B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a quantitative filling device that once introduces and measures a liquid into a measuring chamber defined by a cylinder and a piston, and then fills the same into a container.

Conventionally, quantitative filling devices with various structures have been proposed and put into practical use, but all of these have some kind of valve mechanism between the metering chamber, tank, and filling nozzle, and the suction stroke associated with the relative sliding of the piston and cylinder. The structure is such that the opening and closing of this valve mechanism is controlled in relation to the discharge stroke and the discharge stroke.

The present invention proposes a new filling device that can perform quantitative filling without requiring such a special valve mechanism. This suction port is provided at a position not communicating with the piston, i.e., on the cylinder wall or piston wall that is closed by the piston.
It is characterized in that communication and interruption control between the discharge port and the metering chamber is performed by a suction passage and a discharge passage formed in the piston or cylinder, and by relative rotational movement between the piston and the cylinder.

The invention will now be described with reference to the illustrated embodiments. 1 and 2 show a first embodiment of the present invention, in which 1 is a cylinder, 2 is a piston fitted into the cylinder 1 so as to be able to freely rotate and slide relative to each other; The space defined in between forms the metering chamber 3. The cylinder 1 is connected to a piston rod 6 of an air cylinder device 5 supported vertically at the bottom of the rotating machine frame 4, while the piston 2 is provided with a horizontal arm 7 at its upper end, which is connected to the top of the rotating machine frame 4. It is connected to a piston rod 9 of a horizontally arranged air cylinder device 8. Therefore, the cylinder 1 and the piston 2 can each perform vertical movement and rotational movement by the respective cylinder devices described above.

A suction port 12 connected to the tank 10 via a flexible tube 11 and a discharge port 14 connected to a filling nozzle 13 are opened in the wall surface of the cylinder 1 . The suction port 12 and the discharge port 14 are formed at a position where they do not substantially communicate with the measuring chamber 3 even when its volume reaches its maximum, that is, at a position where they are closed by the piston 2. It is.

On the other hand, the piston 2 has the suction port 12
A suction passage 16 and a discharge passage 18 corresponding to the discharge port 14 are formed. Both passages 16, 18
are formed in a position where either one communicates with the corresponding suction port 12 or discharge port 14 and the other is closed by the cylinder wall, depending on the rotational position of the piston 2. The cylinder 1 with a passage and the piston 2 operate as follows to perform quantitative filling into the container C.

That is, in the present apparatus having the above configuration, FIGS. 1 and 2D show the end of the filling process, that is, the discharging process from the metering chamber 3. At this time, the piston 2 is in a rotational position where its discharge passage 18 is communicated with the discharge port 14. The suction stroke to the metering chamber 3 is performed by rotating the piston 2 in this state 90 degrees clockwise as shown in FIG.
The process begins by setting the state to . That is, at this time, the suction port 12 on the wall of the cylinder 1 and the suction passage 16 of the piston 2 communicate with each other, and when the cylinder 1 is lowered by the air cylinder device 5 in this state, the air is removed from the tank 1 as shown in FIG. of fluid is sucked into the metering chamber 3 and filled. The above is the suction stroke.

In the discharge stroke, the piston 2 is now rotated 90 degrees counterclockwise as shown in FIG.
Begin by matching as shown. When the cylinder 1 is raised in this state, the liquid in the metering chamber 3 is discharged from the filling nozzle 13 via the discharge passage 18 and the discharge port 14, and is filled into the container C. At this time, the table 19 on which the container C is placed is raised together with the cylinder 1 due to the roller 20 at the lower end and the cylindrical cam surface 21 in contact with the roller 20 as the rotary machine frame 4 rotates.

Figures 3 and 4 show another embodiment of the present invention, in which the vertical relationship between the cylinder 1 and the piston 2 is reversed, and the cylinder 1 is fixed to the rotating machine frame 4 so that the piston 2 can move vertically. I'm trying to give it a rotational motion. Reference numeral 22 denotes an air cylinder device equipped with a rotation mechanism that provides rotational movement and linear movement to the piston rod 23. The rest of the structure is substantially the same as that of the apparatus shown in FIG. 1, so the same parts are given the same reference numerals and the explanation will be omitted.

In this device as well, the suction port 12 and the suction passage 1
6 in communication with the piston 2 (Fig. 4 A, B), and a discharge stroke in which the piston 2 is raised at a rotational position different from the suction stroke, in which the discharge port 14 and the discharge passage 18 are communicated with each other. By repeating the steps (C and D in the same figure), quantitative filling into the container C can be performed continuously. In this way, the relative linear movement and rotational movement between the cylinder 1 and the piston 2 can be performed using various mechanisms and arrangements, such as the cam 21 that moves the table 19 up and down.
The cylinder or piston may be moved up and down at the same time.

In the above embodiment, the suction passage 16 and the discharge passage 18 formed in the piston 2 are linear, but this is not necessarily necessary. In other words, the piston's suction passage and discharge passage only need to communicate with the cylinder's suction and discharge ports during the piston's suction and discharge strokes, respectively.For example, when applying linear motion and rotational motion to the piston at the same time, teeth,
The suction port of these passage cylinders constantly during its rotation,
The same function can be achieved by slanting these passages so that they communicate with the outlet.

Furthermore, as shown in FIG. 5, the present invention provides a suction port 12 and a discharge port 14 opening in the piston wall in the piston 2, and a suction passage 16 and a discharge passage 18 in the cylinder 1 wall correspondingly. The same effect can be obtained by using In short, in the present invention, for each of the suction port 12 and the suction passage 16, and the discharge port 14 and the discharge passage 18, one may be formed in the piston 2 and the other in the cylinder 1. For example, the suction port 12 and the discharge passage 18 may be formed in the piston. Provided, discharge port 1
4 and the suction passage 16 can be provided in the cylinder to obtain the same function.

As described above, according to the present invention, there is provided a piston that changes the relative rotational position with respect to the cylinder between the suction stroke and the discharge stroke, and each passage that communicates the metering chamber with the tank or the filling nozzle at each rotational position of the piston. By this action, quantitative filling can be carried out continuously without requiring any special valve device. Therefore, it is possible to eliminate the need for various sealing members associated with the installation of the valve mechanism, thereby reducing costs, improving durability, and facilitating maintenance such as cleaning and inspection.

[Brief explanation of the drawing]

FIGS. 1 and 3 are longitudinal cross-sectional views showing embodiments of the quantitative filling device according to the present invention, and FIGS. 2A, B,
C, D and FIGS. 4A, B, C, and D are longitudinal sectional views and cross-sectional views of the main parts showing different operating states of the device shown in FIGS. 1 and 3, respectively, and FIG. 5 is a diagram showing the present invention. FIG. 7 is a vertical cross-sectional view and a cross-sectional view of main parts of another embodiment of the present invention. 1... Cylinder, 2... Piston, 3... Measuring chamber, 10... Tank, 12... Suction port, 13...
Filling nozzle, 14...discharge port, 16...suction passage, 18...discharge passage.

Claims (1)

[Claims] 1 a cylinder, a piston fitted to the cylinder so as to be slidable linearly and rotatably relative to the cylinder and defining a metering chamber between the cylinder and the cylinder and the piston at the maximum volume of the metering chamber; a suction port that communicates with the tank and a discharge port that communicates with the filling nozzle, which are opened in the sliding surface; a rotation mechanism that changes the relative rotational position of the piston and the cylinder between the suction stroke and the discharge stroke to the metering chamber; A suction passage formed in the sliding surface of the piston and the cylinder that continuously communicates the metering chamber and the suction port during the suction stroke, and a suction passage that continuously communicates the metering chamber and the discharge port during the discharge stroke. A discharge passage is formed on the sliding surface of the piston and the cylinder, and one of the suction port and the suction passage, and the discharge port and the discharge passage are formed in the piston and the other in the cylinder, and the rotation mechanism During the suction stroke and discharge stroke, in which either one of the suction port and the suction passage, or the discharge port and the discharge passage, is communicated with each other by the operation of filling equipment.