JPH022237Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an apparatus for blowing an inert gas into a container in order to prevent oxidation of a liquid filled in the container.

[Conventional technology]

In filling machines that fill containers with liquids such as food and pharmaceuticals, depending on the type of liquid contained, it is necessary to blow inert gas such as nitrogen gas into the container to prevent oxidation of the liquid after filling. For this purpose, filling machines equipped with an inert gas blowing device have been known for some time.

In order to increase the replacement rate between the inert gas blown into the container by such a device and the air inside the container, it is better to inject the gas after inserting the nozzle into the container, and also to When removing from the container, it is preferable to do so after turning off the gas.

[Problem that the invention attempts to solve]

As mentioned above, in order to stop the gas blowing when the nozzle is inserted into and removed from the container, a mechanism to open and close the gas passage is required, and a complicated device including a switching valve etc. is required. I had to.

The present invention has been devised in view of the above points, and provides an inert gas blowing device that can open and close a gas passage with an extremely simple structure.

[Means for solving problems]

The inert gas blowing device according to the present invention includes a container stand that lifts and lowers a container, a gas tube made of an elastic body that supplies inert gas, and a gas tube that is inserted into the container on the stand when the container stand is raised. An inert gas blowing device equipped with a nozzle for blowing inert gas supplied from a gas tube is provided with a pin that is urged downward by a spring and is pushed up by the rise of the container stand, The gas tube is arranged below this pin.

[Effect]

In the inert gas blowing device according to the present invention, when the container table is raised, the pin is pushed up to open the gas tube, and when the container table is lowered, the pin is pushed down by the spring to compress the gas tube, thereby opening and closing the gas passage.

〔Example〕

The present invention will be explained below based on the illustrated embodiments.
Figure 1 shows a quantitative piston type filler (filling machine) equipped with an inert gas blowing device according to an embodiment of the present invention.
FIG.

The filler bowl 2 communicates with the cylinder 8 via the liquid supply channel 4 and the liquid supply side check valve 6.
This cylinder 8 also has a filling side check valve 1.
0, communicates with a filling nozzle 16 via a filter 12 and a filling channel 14. A container stand 18 is disposed below the filling nozzle 16 and is raised and lowered by a mechanism such as a cam or an air lifter.

When the piston 20 in the cylinder 8 is pulled down by the lowering of the connecting rod 22, the liquid in the filler bowl 2 is sucked into the cylinder 8 by opening the check valve 6 on the liquid supply side. Meanwhile, the container stand 18 is raised and the filling nozzle 16 is inserted into a container such as a bottle on the stand. Thereafter, as the connecting rod 22 rises, the piston 20
When the cylinder 8 is pushed up, the liquid in the cylinder 8 pushes open the filling side check valve 10, passes through the filter 12 and the filling channel 14, and is filled into the container from the filling nozzle 16.

The filling nozzle 16 has a double pipe structure, as shown in an enlarged view in FIG.
The liquid in the cylinder 8 is filled into the container through the inside, and between the outer surface of the liquid injection pipe 24 and the outer gas pipe 26, a gas tube 28 (see FIG. 1) is filled.
An inert gas such as nitrogen gas supplied from the container is blown into the container.

A hole 30a is formed in the lower part of the nozzle holder 30 to which the filling nozzle 16 is fixed, and a rod 32 is inserted into this hole so as to be movable up and down.
It is urged downward by a spring 34.
Furthermore, a pin 36 is embedded laterally in the upper part of this rod 32, and the gas tube 28 is piped so as to pass between the lower surface of this pin 36 and the side plane 30b of the nozzle holder 30. . The rod 32 is pushed down by the spring 32 when the container stand 18 is positioned downward, and is pushed up against the spring 34 by the container stand 18 when the container stand 18 rises. It's summery.

The gas tube 28 is made of an elastic material, and when the rod 32 is pushed down, it is compressed by the pin 36 to close the internal gas passage, and when the pin 36 rises together with the rod 32, it returns to its original shape due to its own elasticity. , and the gas passage is opened. Therefore, in the device of this embodiment, the container stand 18
When the container table 18 rises and the tip of the nozzle 16 is inserted into the container on the table, the gas passage opens and inert gas is blown in. When the container table 18 begins to descend, the gas passage is closed and gas is blown in. Since the gas passage is stopped, the gas passage can be opened and closed with an extremely simple structure, and this opening and closing is performed in synchronization with the timing of raising and lowering the container.

Note that this is not limited to the case where the gas passage is blocked by compressing the tube made of an elastic body as in the above embodiment.
Needless to say, it is sufficient to close the gap between the nozzle side and the gas supply source side of the gas passage via a pin that moves up and down as the container table moves up and down.

[Effect of idea]

As described above, according to the present invention, the gas passage can be opened and closed with a simple mechanism, and the inert gas replacement rate can be improved.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view of a metering piston type filler to which an inert gas blowing device according to an embodiment of the present invention is applied, and FIG. 2 is an enlarged sectional view of a nozzle. 16... Nozzle, 18... Container stand, 28... Gas tube, 34... Spring, 36... Pin.

Claims (1)

[Scope of utility model registration request] An inert device that is equipped with a container stand that lifts and lowers a container, a nozzle that is inserted into the container on the stand when the container stand rises and injects inert gas, and a gas passage that supplies inert gas to the nozzle. In the gas blowing device, a pin is provided which is urged downward by a spring and is pushed up as the container stand rises, and the gas passage is arranged below this pin, so that when the container stand rises, An inert gas blowing device characterized in that the gas passage is opened and the gas passage is closed by a pin when descending.