JPS588717Y2 - liquid filling machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a liquid filling machine for filling relatively large containers with liquids such as milk, juices, alcoholic beverages and other drinking liquids, various oil liquids, and medical liquids.

In a liquid filling machine in which the liquid storage tank is a vacuum liquid storage tank and a filling head is protruded downward from the bottom of the vacuum liquid storage tank, an exhaust pipe whose upper part is fixed to the vacuum liquid storage tank side and a lower end of this exhaust pipe are used. The liquid injection pipe is configured to open and close an opening at the lower end using the large diameter part of the liquid injection pipe as a valve.

This injection pipe is normally pushed downward elastically, and when the mouth of the container sent directly below the filling head is pushed up, it is closed by the large diameter part of the exhaust pipe. The opening at the bottom of the container is now open, allowing liquid to be injected into the container from which the air inside is already being exhausted through the exhaust pipe.

When the liquid level of the liquid injected into the container in this manner reaches the lower end of the liquid injection pipe, the amount of liquid in the container does not increase any further.

When liquid is filled in this way, when the container is lowered, the liquid injection pipe also follows the lowering of the container, so
The lower end opening of the liquid injection pipe is again closed using the large diameter part of the exhaust pipe as a valve.

Therefore, the liquid injection is also stopped, the exhaust pipe is also separated from the liquid level in the container, and filling is completed.

Generally, in a liquid filling machine, the diameter of the exhaust pipe, the diameter of the liquid injection pipe, the vacuum suction power, etc. are designed so that the filling can be completed within a few seconds, and the feeding speed of the container and the timing of raising and lowering the container are adjusted accordingly.

In the above-described liquid filling machine, the difference in height between the contact surface of the container mouth at the lower end of the liquid filling pipe and the lower end of the filling pad 16 is the height of the space left in the upper part of the container. Become.

The present invention makes it possible to easily adjust the liquid level when increasing or decreasing the filling amount by changing the liquid level in containers of the same diameter, and eliminates the need for intervening objects such as washers.

In view of this, this project provides a liquid filling machine that allows stepless adjustment of the height between the lower end of the liquid injection pipe and the lower surface of the filler pad. A pad holder of the same diameter is screwed onto the pad holder, and the pad holder can be rotated to change its position by an external operation, so that an accurate filling amount can be obtained.

The embodiment of the present invention will be described with reference to the drawings. Filling heads 2 are provided at the bottom of a vacuum liquid storage tank 1 at concentrically divided equiangular positions, respectively, to protrude downward.

This filling head 2 is movable up and down within an exhaust pipe 5 fixed by a set spring 4 to a support frame 3 fixed in the vacuum liquid storage tank 1, and a guide pipe 6 fixed downward to the bottom of the vacuum liquid storage tank 1. It has a liquid injection tube 7 inserted into.

The liquid injection tube 7 consists of an upper heart tube portion 8 and a cylindrical body portion 9 continuous to the lower portion of the heart tube portion 8, and a male thread 10 is carved on the outer peripheral surface of the cylindrical body portion 9.

The lower end of the core pipe portion 8 forms the lower end opening of the liquid injection pipe 7, and the tapered surface 1 of the umbrella-shaped large diameter portion 11 at the lower end of the exhaust pipe 5.
1a, and is opened and closed using this large diameter portion as a valve.

On the other hand, the male thread 10 of the cylindrical body part 9 has a large diameter pad holder 1.
The pad holder 12 is fixed with a locking nut 13 to prevent it from rotating unnecessarily, and has a notched step 14 along the outer periphery of the lower surface, and a male threaded portion on the outer periphery. 15 each.

An annular protrusion 17 formed along the outer periphery of the upper surface of the pad 16 is fitted into the notched stepped portion 14 .

The pad 16 is made of rubber or synthetic resin, has an inner diameter slightly larger than the outer diameter of the lower part of the cylindrical body part 9, and is fixed by a nut 18 with an inner flange 18a screwed into the male threaded part 15 from below. It is.

Further, the height of the annular protrusion 17 of the pad 16 is larger than the depth of the stepped notch 14, and a gap S is formed between the lower surface of the pad holder 12 and the upper surface of the pad 16 when no load is applied. It is supposed to be done.

Further, the filling pad 16 is provided with a plurality of ventilation holes 20 on the outside where the opening of the container 190 comes into contact, and the air gap S
This allows outside air to flow inside.

That is, the outer peripheral edge of the pad 16 is connected to the pad retainer 12.
It is fixed by a nut 18 and washer 21, and the inner peripheral edge is a free end.

A water droplet tray 22 is attached to the upper surface of the cylindrical body portion 9,
Furthermore, a nut 23 fixes the water drip pan 22 and the guide tube 6.
A compression coil spring 24 is installed between the liquid injection tube T and the liquid injection tube T to give it an elastic downward movement.

An exhaust adjustment cap 25 is provided at the upper end opening of the exhaust pipe 5.
This cap 25 has a vent hole 26 with a smaller diameter than the inner diameter of the exhaust pipe 5, and is fitted to the end of the exhaust pipe 5 via an O-ring 27. Several types of exhaust pipes are available, and they are installed in a removable and replaceable manner so that the diameter of the exhaust pipe can be adjusted to obtain the optimum exhaust speed.

Note that the reference numeral in the figure indicates the liquid level, which is connected to the original tank and maintained at a constant level by a liquid level holding mechanism (not shown).

Since the present liquid filling machine is constructed as described above, the container 19
When the 0 mouth portion comes into contact with the lower surface of the injection pad 16 as the container rises, and the free end of the filler pad 16 on the inner peripheral edge side is further pressed against the lower surface of the pad holder 12, the gap S is closed and the ventilation hole 20 is closed. Since the inflow of outside air from the exhaust pipe 5 is blocked, exhaust air is started through the exhaust pipe 5.

At the same time, the liquid injection pipe 7 is pushed up against the elastic pressing force of the compression coil spring 24, and the lower end opening of the liquid injection pipe 7, which had been closed using the lower end large diameter portion 11 of the exhaust pipe 5 as a valve, is opened. So,
The liquid flowing into the liquid injection pipe 7 from the vacuum liquid storage tank 1 is instantaneously injected into the container 19.

Once the liquid level in the container reaches the lower end of the liquid injection pipe 7, the liquid amount will not increase any further.

Eventually, when the container 19 is lowered, the filling pad 16 returns to its old state, and the outside air passes through the air gap S from the ventilation hole 20.
Since the filling passes between the inner circumferential surface of the filling pad 16 and the lower outer circumferential surface of the cylindrical body portion 9 and enters the container 19, the vacuum in the upper part of the container 19 is broken, and the container 19 is very easily separated from the filling head 2. .

At this time, the liquid injection pipe 7 has already been pushed down by the elastic pressing force of the compression coil spring 24, so the lower end opening is closed by the large diameter portion 11 of the exhaust pipe 50, which serves as a valve.

By repeating the above operations, new containers are sequentially filled.

In the liquid filling machine of the present invention, the container 19 formed at the time of filling
The height of the inner cavity, that is, the lower end of the liquid injection pipe 7 and the filling pad 16
The height of the lower surface of the pad holder 12, which the container opening contacts, is adjusted externally to the optimum dimension by vertically screwing the nut 14 and the pad holder 12, thereby changing the shape of the container and filling the contents. Adjustments can be made very easily, such as when changing the concentration of

The liquid filling machine of the present invention has many excellent effects, such as making it easy to adjust the liquid level, reliably and easily correcting changes in liquid volume, and enabling highly accurate filling.

BRIEF DESCRIPTION OF THE DRAWINGS The drawing is a longitudinal cross-sectional view showing a main part of an embodiment of the liquid filling machine of the present invention.

Claims (1)

[Scope of utility model registration request] A predetermined number of filling heads projecting downward from the bottom of the vacuum liquid storage tank are passed through an exhaust pipe fixed to the vacuum liquid storage tank through the center, and the large diameter part formed at the lower end of this exhaust pipe is used as a valve to connect the lower end. A large-diameter pad holder is provided with a liquid injection tube that is elastically pressed down so that the opening can be opened and closed, a male thread is formed on the outer periphery of this liquid injection pipe, and the pad holder is screwed onto the male thread to adjust its vertical position. A filling pad that can freely cut off the air supply is installed with a small gap between it and the lower surface of the pad holder, and the height of the space inside the container can be freely selected by adjusting the position of the pad holder. liquid filling machine.