JPH0741947B2 - Filling nozzle - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filling nozzle, and more particularly to a filling nozzle provided in a piston type quantitative filling machine or the like.

[0002]

2. Description of the Related Art As shown in Japanese Patent Application No. 2-254550, a conventional piston type quantitative filling machine is constructed by connecting a tank containing a content to be filled in a container and a cylinder through a passage. The passage can be opened and closed by the first valve,
Further, the cylinder and the filling nozzle are connected to each other, and a space between them can be opened and closed by a second valve provided above the filling nozzle. With this filling machine,
First, the first valve is opened to suck a predetermined amount of contents into the cylinder, then the first valve is closed and the second valve is opened, and the cylinder is operated to suck the contents therein. The object is pushed out and sent to the filling nozzle, and the container is filled from the lower opening.

[0003]

In the above conventional filling nozzle, when filling a high-viscosity liquid, when filling is completed,
The liquid in the nozzle does not fall completely into the container and remains, causing the thread to pull, causing liquid dripping to stain the container and the surroundings of the machine body, and the filling amount in the container There were problems such as not being constant.

The present invention has been made in order to eliminate the above-mentioned drawbacks, and provides a filling nozzle which does not cause a state of pulling a thread after the completion of filling or causing liquid dripping.

[0005]

A filling nozzle according to the present invention includes a liquid supply pipe for filling a container with contents from a lower opening, a supply passage connected to the liquid supply pipe, and a supply passage. And a filling liquid valve that opens and closes between the supply passage and the liquid supply pipe, and a shutoff valve that opens and closes the lower opening of the liquid supply pipe. The shut-off valve and the filling liquid valve are connected by a pipe having an air passage inside to open and close both valves integrally, and an air valve is provided to cut off the communication of the air supplied to the air pipe. It is a thing.

[0006]

In the filling nozzle, the air valve is opened immediately after the filling of the container is completed, air is sent into the air pipe, and the liquid adhering to the tip of the nozzle is blown out into the container. Even if it is a viscous liquid, the liquid will not drip or drop thereafter.

[0007]

The present invention will be described below with reference to the illustrated embodiments.
FIG. 1 is a vertical cross-sectional view of a main part of a piston type quantitative filling machine equipped with a filling nozzle according to an embodiment of the present invention, in which a circular plate 5 projecting on the outer periphery of a rotating body 4 rotating about an axis 2 is shown. To
A plurality of filling mechanisms 6 are provided at equal intervals. Each filling mechanism 6 includes a cylinder 10 for sucking a fixed amount of the filling liquid by lowering the piston 8, a filling nozzle 12 for filling the filling liquid sent from the cylinder 10 by raising the piston 8 into a container, a tank and a cylinder. And two valves 14 and 16 for opening and closing the passage between the cylinder 10 and the filling nozzle 12, respectively.
The filling liquid (contents) is filled in a container that is moved up and down by a container table (not shown) provided immediately below each filling nozzle 12.

The cylinder 10 has a passage 1 vertically passing through passage members 19 and 20 fixed above and below the disc 5 of the rotating body 4.
It is fixed to the lower side of 9a, 20a. This cylinder 1
The piston 8 in 0 is moved up and down by an air cylinder or the like (not shown).

A bellows type is provided in a passage 19a which vertically penetrates the disc 5 to which the schilling 10 is fixed and the passage members 19 and 20 so as to disconnect the passages 19a and 20a from the supply passage 32 from the tank. Poppet valve 14
Is provided. This bellows type poppet valve 14
Is a tapered valve seat 1 formed in the upper passage member 19.
9b and a valve body 40 attached to a rod 38 slidably fitted in a tubular body 36 fixed on the passage member 19, and a guide fixed to the upper end of the rod 38. The rod 38 is constantly urged upward by a spring 44 arranged between the cover 42 and the upper portion of the cylindrical body 36.

A passage member 20 fixed to the lower surface side of the disk 5.
The horizontal passage 2 that communicates with the passage 20a that penetrates vertically.
0b is formed, and the filling nozzle 12 is fixed by connecting to the horizontal passage 20b. Filling nozzle 12
Is a vertical passage member 50 fixed to the passage member 20.
And a liquid supply pipe 51 connected therebelow.

A vertical passage member 50 above the filling nozzle 12.
A second bellows-type poppet valve 16 is provided therein for shutting off the communication between the horizontal passage 20b and the inside of the liquid supply pipe 51. The bellows-type poppet valve 16 has a configuration similar to that of the first bellows-type poppet valve 14 described above, and includes a tapered valve seat 50 a formed on the inner surface of the vertical passage member 50 and the vertical passage member 50. And a valve body 56 attached to the lower end of a rod 54 slidably fitted in a cylindrical body 52 fixed to the rod 54, and the rod 54 is always kept by a spring 57 fixed to the upper end of the rod 54. It is biased upward.

A column 60 is fixed on the disc 5 between the cylinder 10 and the filling nozzle 12, and a rotary shaft 64 is rotatably supported on the column 60 and rotated by operating a switching lever 66. It has become so. Two eccentric rotary plates 68, 70 are fixed to the rotary shaft 64 with their phases shifted, and one rotary plate 68 or 70 is rotated by the rotation of the rotary shaft 64 so that both poppet valves 14, 16 are rotated.
Depress one of the upper rods 38 or 54 to alternately open and close the two poppet valves 14,16.

An air pipe 72 is attached below the second poppet valve 16 in the filling nozzle 12,
A valve element 74 is fitted around the lower end of the air pipe 72. The valve body 74 is provided with a shut-off valve 78 that is seated on the inner surface of the inlet port 76 attached to the lower end of the liquid supply pipe 51 to open and close the liquid passage between the outer surface of the air pipe 72 and the inner surface of the liquid supply pipe 51. I am configuring. Various materials such as rubber, resin, and metal can be used as the material of the valve element 74 of the shutoff valve. Shut-off valve body 74
The valve body 56 of the second poppet valve 16 and the valve body 56 of the second poppet valve 16 are connected to each other by an air pipe 72 so as to move up and down as a unit to move the upper and lower valves 1.
It is designed to open and close 6, 78 at the same time. A substantially triangular guide 80 is fitted on the outer periphery of the central portion of the air pipe 72 to guide the air pipe 72 ascending and descending. The shape of the guide 80 is not limited as long as the upper and lower passages can be secured.

An air passage 54a is provided inside the rod 54 to which the valve body 56 of the second poppet valve 16 is attached.
Is formed and communicates with the inside of the air pipe 72. A hose 82 is provided above the air passage 54a of the rod 54.
Air is supplied from an air supply source (not shown) via the. Air supply to the air hose 82 is cut off by an air valve 84 provided on the support column 60 supporting the rotating shaft 64. This air valve 84
Is opened and closed by a cam 86, and is immediately opened to send air immediately after the filling process described later is completed.

The operation of the piston type quantitative filling machine having the above structure will be described. First, in the first step of filling work,
By operating the switching lever 66, the rod 38 on the right side in FIG.
By pushing up, the first poppet valve 14 on the cylinder 10 side is opened. Next, the piston 8 is lowered to suck a predetermined amount of filling liquid from the tank into the chamber of the cylinder 10 through the supply passage 32.

Then, the switching lever 66 is operated again to close the poppet valve 14 on the cylinder 10 side and open the second poppet valve 16 on the filling nozzle 12 side.
The piston 8 is raised to fill the filling liquid in the cylinder 10 into the container on the container table via the passages 20 a and 20 b of the passage member 20 and the liquid passage in the filling nozzle 12.

After that, the second poppet valve 16 is closed by the switching lever 66. Then, the valve body 74 of the shutoff valve 78, which is connected to the valve body of the second poppet valve 16 via the air pipe 72, is also injected at the same time.
The valve 78 is seated on the inner valve seat of the valve 6 and the valve 78 is also closed. As a result, the portion of the filling liquid that has a high viscosity and that adheres to the inside of the liquid supply pipe 51 and does not fall into the container is trapped in the liquid supply pipe 51 and does not fall. Both valves 16, 78
Immediately after closing, the air valve 84 is opened to momentarily feed air into the air pipe 72. Then, the liquid remaining inside the injection port 76 attached to the lower end of the liquid supply pipe 51 is blown off and enters the container.

Since the air is ejected from the injection port 76 immediately after the completion of the filling, the filling nozzle 1 can be used even with a highly viscous filling liquid.
There is no possibility that it will stick to 2 and then it will hang down like pulling a thread, and there will be no possibility that it will fall and stain the surroundings.
The filling nozzle 12 is suitable for a high-viscosity filling liquid, but it goes without saying that it can also be used for filling a low-viscosity liquid. Further, in the above embodiment, the valve body 74 of the shutoff valve 78 is adapted to be seated on the inner surface of the injection port from above and closed, but it protrudes to the lower side of the injection port and rises to the position below the injection port 76. Of course, it may be a valve of the type which is seated on the end face.

[0019]

As described above, according to the present invention, even when a high-viscosity liquid is filled, there is no possibility that the thread will hang down after being filled, and there will be no danger of soiling the surroundings by dropping, and it is always accurate. Any amount of filling can be done.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a main part of a piston type quantitative filling machine including a filling nozzle according to an embodiment of the present invention.

[Explanation of symbols]

 10 Supply Means (Cylinder) 16 Filling Liquid Valve (Second Poppet Valve) 20b Supply Channel (Horizontal Passage) 51 Liquid Supply Pipe 72 Air Pipe 76 Lower Opening (Inlet) 78 Shut-off Valve 84 Air Valve

Claims (1)

[Claims] 1. A liquid supply pipe for filling a container with contents from a lower opening, a supply means for supplying the contents via a supply passage connected to the liquid supply pipe, a supply passage and a liquid supply pipe. In a filling nozzle having a filling liquid valve that opens and closes between and, a shut-off valve that opens and closes the lower opening of the liquid supply pipe is provided, and an air passage is provided inside the shut-off valve and the filling liquid valve. A filling nozzle characterized in that an air valve is provided for connecting and closing both valves integrally with each other by a pipe provided and for interrupting communication of air supplied to the air pipe.