JPS6119514B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a suction deaeration device for a counter pressure type liquid filling machine.

In a back-pressure liquid filling machine, in order to reduce residual air in the beverage and prevent a drop in carbon dioxide concentration, the filling container is connected to the suction circuit via a vent tube before filling, and the air inside the filling container is sucked out. It is already known from Japanese Unexamined Patent Publication Nos. 51-146979, etc.

However, in the conventional system, the filling valve chamber is fixed, so it is easy to install a vacuum circuit. At present, the installation of circuits is extremely troublesome due to the configuration and is considered impossible.

In other words, even if an attempt is made to install a vacuum circuit in this system, the vent tube that communicates with the filling container is in communication with the piston chamber that pressurizes the filling valve chamber of the filling head, so when the vent tube is sucked, suction pressure will be applied to the piston chamber. As a result, the filling valve chamber is sucked upward and the filling container cannot be sealed.

Therefore, it is necessary to provide a pressing cam mechanism for the filling valve chamber that can resist the suction pressure so that the filling valve chamber is not sucked upward, and that does not apply abnormal pressing force to the filling container, resulting in an extremely complicated configuration. There are defects that can cause damage and malfunction.

The present invention is an attempt to improve such defects in the filling valve chamber elevating system, and the filling valve chamber is provided in the filling head of the filling device so that it can be raised and lowered by an elevating mechanism, and the piston of the cylinder provided in the filling head is In a reverse pressure liquid filling machine that pressurizes the filling valve chamber into the filling container during filling, a through hole for pressurized gas supply communicating with the vent tube of the filling valve chamber is provided in the filling head, and the through hole is Connected to the vacuum pump via the deaeration switching valve,
Furthermore, the cylinder is made independent so as not to communicate with the through hole, and its upper portion is communicated with a pressurized air supply device.

An embodiment of the present invention will be described with reference to the drawings. A shaft cylinder 2 fitted between the upper and lower fixed tubes 1, 1 and rotated by an appropriate rotation mechanism (not shown) has an inner portion that is connected to the fixed tubes 1, 1. An annular liquid distributor 3 with a circular cross section is provided around the axial cylinder 2 and integrally formed therewith, and the liquid distributor 3 communicates with the inside of the cylinder 2 to form a fluid passage a. The branch pipes 4 extend in the connection direction and are radially provided in the shaft cylinder 2, communicating with the fluid passage a.

The lower part of the lower fixed pipe 1 is connected to a filling liquid tank 8 via a pressure pump 6 and a liquid supply valve 7 controlled by the differential pressure control device 5, and the upper part of the upper fixed pipe 1 is connected to the differential pressure control device 5. The upper part of the liquid distributor 3 is connected to a pressurized gas supply device (not shown) via a pressurized gas control valve 9 that operates in conjunction with the It is connected to the fluid passage a by a pressurized gas supply pipe 10, and under the control of the differential pressure control device 5, a filled liquid storage layer b that occupies most of the inside of the liquid distributor 3 and a small amount of pressurized gas stored above it are formed. It is formed in layer c.

Also, around the upper fixed pipe 1 is a pressurized air chamber 11 connected to a pressurized air supply device (not shown).
and a vacuum chamber 13 connected to the vacuum pump 12 are fixed, respectively, and a holding disk 15 of a filling device 14 is attached to the shaft cylinder 2 so as to rotate together.

The filling device 14 is roughly divided into a filling head 16 fixed to a holding disk 15, a cylindrical filling valve chamber 17 that can be raised and lowered relative to the filling head 16, and an elevating mechanism 18 that raises and lowers the filling valve chamber 17. It is composed of.

The filling head 16 is provided with a stepped through hole 19 for supplying pressurized gas, and a sealed cylinder 21 in which a piston 20 is fitted in the lower part of the stepped through hole 19, and the upper end of the through hole 19 is divided into two to supply pressurized gas. One of the gas switching valves 22 communicates with an annular pressurized gas distributor 23 and the other with an annular snift chamber 24, and a deaeration switching valve 25 is also provided in the middle of the through hole 19. The through hole 19 is formed to be switchable with the annular suction air container 26.

The pressurized gas distributor 23 is connected to the pressurized gas supply pipe 10, the suction air container 26 is connected to the vacuum chamber 13 through pipes 27 and 28, respectively, and the snift chamber 24 is connected to the surroundings of the lower fixed pipe 1. A pipe 30 is inserted into the snift introduction chamber 29 provided in the
Furthermore, the snift introduction chamber 29 is connected to the atmosphere through a pipe 31.

The lower part of the cylinder 21 is switchably connected to the upper part of the cylinder 21 and the atmosphere via a switching valve 32, and the upper part of the cylinder 21 is connected to a pipe 33.
It is connected to the pressurized air chamber 11 via.

A filling valve chamber 17 is fixed to the lower end of a piston rod 34 which is fixed to the piston 20 and whose upper end is fitted into the stepped through hole 19 so as to be vertically slidable. The through hole 19 and the filling valve chamber 17 are communicated with each other, and the piston rod 34 is formed to be able to move up and down by a lifting mechanism 18 provided in the filling head 16.

That is, the elevating mechanism 18 includes a support frame 36 fixed to the filling head 16, an elevating lever 37 that supports the piston rod 34 that is pivotally supported by the support frame 36, and a bending lever 38 whose bent portion is pivoted to the support frame 36. The bending lever 38 is urged clockwise by a spring 39, a roller 40 provided at the end of the long arm is regulated by a cam track 41, and a roller 42 at the end of the short arm is bored into the lifting lever 37. It fits into the provided arcuate guide hole 43.

The filling head 16 therefore pivots and the bending lever 38
The piston rod 34 is configured to be able to move up and down by regulating the vertical movement of the roller 40 with a cam track 41.

A filling liquid supply hole 44 is provided in the upper tangential direction of the filling valve chamber 17, and the filling liquid supply hole 4
4 is a universal joint 45, 45 and a liquid supply tube 4
A flow valve 48 which opens and closes the filling hole 47 is connected to the lower part of the liquid distributor 3 via a spring 49 and is connected to the lower part of the liquid distributor 3 through a spring 49 inside the filling valve chamber 17, and is connected to the lower part of the liquid distributor 3 through a spring 49. A vent tube 50 communicating with the through hole 35 is provided in the center so as to be biased downward by a spring 51.

The flow valve 48 and the vent tube 50 are provided with a cam 5 mounted on a double actuating rod 52.
3 and 53 are formed to be able to engage freely at the same time, and the cams 53 and 53 of the double operating rod 52 are connected to the flow valve 4.
8 and the vent tube 50, the flow valve 48 is closed and the vent tube 50 is held in the raised position, and when the engagement is released, the flow valve 48 is opened by the spring 49 and the vent tube 50 is moved to the spring 51. It protrudes downward.

In addition, in the figure, 54 is a seal pad which is provided at the lower edge of the filling valve chamber 17 and comes into contact with the mouth edge of the filling container A, and 55
56 is the guide rail of the pressurized gas switching valve 22, and 57 is the deaeration switching valve 25.
58 is an operating device for the switching valve 32;
59 is a guide rail for the switching valve 32, 60 is an actuating device for the double operating rod 52, and 61 is the double operating rod 52.
This is the guide rail.

Since the embodiment of the present invention is constructed as described above, when the upper and lower parts of the piston 20 of the cylinder 21 are in communication with each other through the switching valve 32, the elevating mechanism 18 is regulated by the cam track 41 and the piston rod is supported by the elevating lever 37. 34 and when the seal pad 54 of the filling valve chamber 17 comes into contact with the mouth edge of the filling container A, the deaeration switching valve 25 is activated by the actuation cam 57 to communicate the stepped through hole 19 with the suction air container 26. The inside of the filling container A is communicated with the air container 26, and the air inside the filling container A is pumped by the vacuum pump 12 to the vent tube 50, the through hole 35, the stepped through hole 19, the suction air container 26, the pipe 28, and the vacuum chamber. The air is evacuated via 13.

Next, when the deaeration switching valve 25 returns to its original state, the pressurized gas switching valve 22 is actuated by the actuating device 55 to connect the stepped through hole 19 to the pressurized gas distributor 23 and connect the pipe 27 and the pressurized gas supply pipe. At the same time, the switching valve 32 is actuated by the actuating device 58 to communicate the lower part of the piston of the cylinder 21 with the atmosphere, and the piston 20 is connected to the upper part of the piston. The filling valve chamber 17 is pressurized to the filling container A via the piston rod 34 by applying pressure with pressurized air.

Next, the double actuating rod 52 is actuated by the actuating device 60, and its cams 53, 53 disengage the vent tube 50 and the flow valve 48, causing the vent tube 50 to protrude into the filling container A, and at the same time, the flow valve 50 is opened and the liquid in the filling valve chamber 17 is filled into the filling container A through the filling hole 47.

When filling is performed and the liquid level in the filling container A closes the vent tube 50 and the gas pressure and liquid pressure at the top of the filling container A are balanced, the liquid level rises to the liquid level in the liquid distributor 3 and the liquid stops flowing down. Double operating rod 52
returns and raises the vent tube 50, and the flow valve 48 closes to raise the vent tube 50.
The liquid in 0 naturally falls into the filling container A.

Thereafter, the pressurized gas switching valve 22 is switched, and the stepped through hole 19 is communicated with the atmosphere via the snift chamber 24, pipe 30, snift introduction chamber 29, and pipe 31, and the filling container A is brought to normal pressure, and the switching valve 32 The piston 2 of the cylinder 21 is also switched.
Filling container A of filling valve chamber 17 with upper and lower parts connected to each other
After releasing the pressurizing action, the piston rod 34 is raised by the lifting mechanism 18 to fill the filling valve chamber 1.
7 is separated from the filling container A, and the filling operation is completed.

Thus, the filling liquid is supplied to the filling valve chamber 17 from the filling liquid tank 8 through the lower fixed pipe 1 and the branch pipe 4 to the liquid distributor 3 while being rectified in the tangential direction, and further from the liquid distributor. Filling valve chamber 17 by liquid supply tube 46
In this case, the differential pressure control device 5 controls the pressure control valve 9 to keep the head pressure in the liquid distributor 3 constant at all times. It is something to keep.

The present invention is a reverse pressure type liquid filling machine in which a filling valve chamber moves up and down, in which a through hole for supplying pressurized gas that pressurizes the inside of a filling container during filling is communicated with a vent tube of the filling valve, and the filling valve chamber is connected to the filling container. The cylinder to be pressurized is made independent so that it does not communicate with the through hole, and the air inside the filling container is sucked by the vacuum pump through the deaeration switching valve provided in the through hole, so that the deaeration suction pressure is applied to the filling container. To easily reduce residual air in a beverage and prevent a decrease in carbon dioxide concentration in this type of filling valve raising/lowering method by smoothly and reliably deaerating air in a filling container without impeding the sealing action of a valve chamber. Moreover, its configuration is extremely simple and does not require any special configuration.Furthermore, there is no need to blow out the vent tube before filling, which is an advantage in that it can reduce the amount of pressurized gas consumed. It has some characteristics.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view of the present invention, FIG. 2 is a side view of the main part, and FIG. 3 is a cross-sectional plan view of the main part. 11... Pressurized air chamber, 12... Vacuum pump, 14... Filling device, 16... Filling head, 1
7... Filling valve chamber, 18... Lifting mechanism, 19...
...Stepped through hole, 20... Piston, 21... Cylinder, 25... Deaeration switching valve, 50... Vent tube, A... Filling container.

Claims (1)

[Claims] 1. In a reverse pressure type liquid filling machine, in which a filling valve chamber is provided in the filling head of the filling device so as to be able to be raised and lowered by an elevating mechanism, and the filling valve chamber is pressurized to the filling container during filling by a piston of a cylinder provided in the filling head. , the filling head is provided with a through hole for pressurized gas supply that communicates with the vent tube of the filling valve chamber, and the through hole is connected to the vacuum pump via a deaeration switching valve; A reverse pressure type liquid filling machine equipped with a suction deaeration device that is independent so as not to be in communication with the pressurized air supply device, and whose upper part is connected to the pressurized air supply device.