JPS5899390A - Filler - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a filling device for filling a container with a filling liquid, and more particularly to a filling device suitable for filling a container made of a flexible material such as synthetic resin with a filling liquid.

As a conventional filling device, the container is raised and the filling nozzle is relatively inserted into the container, the opening of the container is sealed with a sealing material, and the liquid valve is opened as the container continues to rise, and the filling liquid is poured into the container. In some cases, the air inside the container is discharged from a discharge pipe to an external collection tank or the like.

In this type of filling device, when the container is filled with filling liquid, excess filling liquid is discharged from the discharge pipe to the recovery tank, thereby controlling the filling amount in the container to a predetermined amount. . When this state is reached, the container is lowered, the liquid valve is closed, and the container is released from the sealing state with the sealing material, thereby completing the filling operation.

In a filling device having such a configuration, the lifting and lowering speed of the container has been attempted to be as fast as possible without interfering with operation due to the miniaturization of the device, shortening of filling time, etc.

However, it has been found that increasing the speed of raising and lowering the container does not pose a problem when the container is made of a hard material such as glass, but it does pose a problem when the container is made of a flexible material such as synthetic resin. In other words, when a flexible container is used, the container expands due to the filling pressure during filling, and then the container descends and the liquid valve closes, causing the container to continue to be sealed by the sealing material. When released, the filling liquid inside the container is scattered due to the restoring force of the container itself, or even if there is no such splashing, the degree of expansion of each container is different. The filling amount was uneven. This problem can be solved by reducing the descending speed of the container to allow a certain amount of time between the liquid pulp closing and the sealing material releasing the container. Since the pressure inside the container returns to near atmospheric pressure via the discharge pipe, the above-mentioned liquid splashing and uneven filling amount can be prevented, but on the other hand, the lowering time of the container becomes longer.

Therefore, the present invention makes the average descent speed of the container different from the time when the liquid valve closes until the sealing by the sealing material is released and the average descent speed of the container thereafter, so that the former is slow and the latter is fast. The present invention provides a filling device that can prevent liquid splashing and non-uniformity of filling amount, and at the same time shorten the overall lowering time of the container.

The present invention will be explained below with reference to the illustrated embodiment. In Fig. 1, (1) is a casing attached to a filling liquid tank (not shown), and (2) is a stepped hole (3) formed in this casing (1). A liquid valve is slidably fitted into the small diameter part (3a), and the large diameter part (3b) of the stepped hole (3) communicates with the bottom of the filling liquid tank via the passage (4). ing. The filling liquid in this filling liquid tank (not shown) is pressurized by gas introduced into the tank, so that high-speed filling can be performed.

The liquid valve (2) has a liquid injection pipe (5) connected to its lower end.
and a radial passageway (7) communicating with the liquid passageway (6) of the liquid injection pipe (5), and a valve member (8) provided above the passageway (7). (8) is seated on the stepped portion of the stepped hole (3) by a spring (9) that urges the liquid valve (2) downward, and is usually attached to the large diameter portion (3b).
The communication between the inside and the passage (7), and therefore between the inside of the filling liquid tank and the liquid passage (6) is cut off. The lower end of the liquid injection pipe (5) is closed by a closing member (10), and the liquid passage (6) inside thereof is an opening ( 11) to the outside.

An outer pipe (12) for opening and closing the opening (11) is slidably fitted on the outer periphery of the liquid injection pipe (5), and a sleeve (13) is integrally attached to this outer pipe (12). ing. The upper part of this sleeve (13) is slidably fitted into the small diameter part (3a) of the stepped hole (3), and the liquid valve (2) is fitted into the small diameter part (3a) of the stepped hole (3).
), and as described later, when this sleeve (13) is raised, the liquid valve (2) is raised via the contact member (14). I'm trying to be able to do that. Also this sleeve (
A sealing material (16) for closing the opening of the container is attached to the lower end of 13) via an empty size adjuster (15), and the empty size adjuster (15) can adjust the vertical position of the sealing material C16). is now possible. A spring (
17) and normally the outer pipe (12) is closed with a closing member (
10), thereby opening the opening 411).
is closed.

Furthermore, a distance J is provided from the middle part of the liquid injection pipe (5) to the lower part.
! (20) and partitions the inside thereof into the above-mentioned liquid passage (6) and air discharge passage (21), and this discharge passage (21)
The lower end of the liquid injection pipe (5) is communicated with the outside through an opening (22) formed in the liquid injection pipe (5). This opening (22) is also normally closed by the outer pipe (12) like the opening (11). On the other hand, the upper end of the discharge channel (21) communicates with the inside of the sleeve (13) via a through hole (23) drilled in the liquid injection pipe (5), and is further bored in the abutment member (14). It is communicated with a recovery tank (not shown) via a through hole (24) and a passage (25) formed in the casing.

This recovery tank is for recovering excess filling liquid and is open to the atmosphere.

However, as shown in FIG. 2, an elevating table (27) for elevating the container (26) to a position below the liquid injection pipe (5) is provided.
has been established. This elevating table (27) is raised and lowered by an elevating mechanism such as a cam mechanism or a cylinder device (not shown) in the same way as in the conventional case, but the difference from the conventional container is that the conventional container is In contrast, in the present invention, at least the container (26)
The average rate of descent (in line (B )
(see line (C) in Figure 3) is set to be considerably lower than /I, and the subsequent average descent speed (see straight line (C) in Figure 3) is set to be higher than before.

In the above configuration, the container (
26) is supplied, the lifting table (27) rises to bring the opening of the container (26) into pressure contact with the sealing material (16) to seal the container (26), and then the container (26)
The sleeve (13), the outer pipe (12), etc. are raised against the spring (17), and the opening (
11) and the opening (22) of the discharge path (21). When the container (26) is further raised, the sleeve (1
3) The upper end of the liquid valve contacts the abutting member (14), and the filling liquid in the liquid valve liquid tank flows into the passage (4), +
7), the container (
The air inside the container (26) is filled into the opening (26).
2), is discharged to the collection tank via the discharge path (21), through holes (23), (24), and passage (25) (Figure 2 +8
) state).

When the filling liquid progresses and the container (26) is filled with the filling liquid, the excess filling liquid flows through the discharge path (21).
etc., and are then discharged to the recovery tank.

In this state, the flexible container (26) is expanded by the filling pressure caused by the pressure introduced into the filling liquid tank and the water head of the filling liquid (the state shown in FIG. 2(b)).

Next, when the container (26) is filled with the filling liquid, the container (26) is filled with the filling liquid.
26) is gradually lowered at a speed shown by straight line (B) in FIG. When the container (26) is lowered, it first appears in Figure 3 (
In the position indicated by e) the liquid pulp (2) closes, thereby cutting off the filling pressure acting on the container (26). Conventionally, after this, as seen from the straight line (A), the sealed state by the sealing material (16) was immediately released and the container rapidly returned to its original state, causing liquid splashing, etc. In this embodiment, a relatively long time is given between the closing of the liquid valve (2) and the release of the above-mentioned sealed state, and the discharge passage (21) is open in the bracket state, so that the above-mentioned The restoring force of the container (26) acts on the filling liquid in the container to discharge it from the discharge path (21) to the collection tank, and as a result, the container (26) has a lower capacity than before. The filling liquid gradually returns to its original state, and in this state there is no chance of the filling liquid scattering outside.

While the container (26) descends to the position shown at point (C) in FIG. 3, the container (26) returns to almost its original state as described above (the state shown in FIG. ), container (2
6) is descended at a high speed as shown by straight line (C) in FIG. Then, at point (f) in Figure 3, the sealed state of the container (26) is released, but as mentioned above, at this time, the container (26) has almost returned to its original state, so there is no liquid splashing. This will not occur, and the filling amount will be managed with higher precision than in the past. In addition, the liquid passage (
6) opening (!I) and the opening (22) of the discharge passage (21).
) are closed by the outer vibrator (12), so that the filling liquid remaining inside them will not drip into the container (26). When the elevating table (27) descends to the lowering end (Td in Figure 2), the container (26) is carried out from above the table (27), a new empty container is supplied, and the above-mentioned process is carried out. The operation is repeated.

Note that the container may be lowered stepwise as shown by the imaginary line (D) in FIG. 3, and the recovery tank may be communicated with a negative pressure source. Furthermore, instead of raising and lowering the container, the nozzle side may be raised and lowered.

As described above, according to the present invention, it is possible to prevent liquid splashing and uneven filling amount caused by rapid recovery of the container without sacrificing the speed of the filling device. .

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view showing one embodiment of the present invention, and FIG.
) to fd) are operation explanatory diagrams showing different states, and FIG. 3 is a characteristic curve diagram showing the lowering state of the container. (2)...Liquid valve (5)...Liquid injection pipe (6)...
Liquid passage (16)... Sealing material (21)... Discharge pipe (26)... Container (27)... Lifting table t31 Figure 3 Storage

Claims (1)

[Claims] A juice pipe for filling the container with liquid, a discharge pipe for discharging the air in the container, a sealing material disposed on the outer periphery of these injection pipes and the discharge pipe to seal the opening of the container, and an elevating mechanism that raises and lowers the container relative to the liquid injection pipe and presses the opening of the container to the sealing material; and opens the liquid injection pipe in response to the relative rise of the sealing material due to the crimping of the container. In a filling device equipped with a liquid valve, the average descending speed of the container from the time when the liquid valve closes the liquid injection pipe due to the relative descent of the container until the sealing by the sealing material of the container is released, A filling device characterized in that the rate of descent is set to be lower than the average descent speed of .