JPS5952113B2 - Reverse pressure liquid filling machine with vent tube lifting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a lifting device for a vent tube of a counter pressure type liquid filling machine.

In a counter-pressure liquid filling machine, the filling valve chamber is configured to be able to move up and down with an elevating mechanism relative to the filling head. It is known from Japanese Patent Application Laid-open No. 136988/1988 that the pen 1 to tube is raised downward after filling is completed to allow the liquid inside to flow down. Since the lifting mechanism is provided in the pressurized gas return chamber of the filling head, a large amount of pressurized gas corresponding to this space is consumed for each filling operation, which is extremely uneconomical and also complicates the structure of that part. Further, there is a defect that when cleaning the inside thereof, the cleaning liquid enters the cylinder which pressurizes the filling valve chamber to the filling container.

The present invention has been made to improve these deficiencies by providing a filling valve chamber in the filling head of the filling device so that it can be raised and lowered by an elevating i mechanism, so that the filling valve chamber can come into contact with the filling container, and the filling valve chamber can be brought into contact with the filling container. In a reverse pressure type liquid filling machine, a valve chamber is provided with a vent tube that can be freely raised and lowered, and after filling is completed, the vent tube is raised above the liquid level of the filling container to allow the liquid in the vent tube to flow down. The filling valve chamber is energized to protrude downward, and the flow valve in the filling valve chamber is energized to the open state by the spring.Furthermore, the double operating rod provided in the filling valve chamber drills the vent tube and the flow valve into the spring. The gist is that a cam is provided for locking.

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. Branch pipes 4 extending tangentially and radially provided on the shaft tube 2
and communicates 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 The liquid distributor 3 is connected to the fluid passage a by a pressurized gas supply pipe 10, and is controlled by the differential pressure control device 5.
A filled liquid storage layer from which most of the liquid can be discharged is formed, and a small amount of pressurized gas storage layer C is formed above the filled liquid storage layer.

Further, a pressurized air chamber 11 connected to a pressurized air supply device (not shown) and a vacuum chamber 13 connected to a vacuum pump 12 are fixed around the upper fixed pipe 1, and a filling device is attached to the shaft cylinder 2. Fourteen holding disks 15 are attached 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.

Thus, the pressurized gas distributor 23 is connected to the pressurized gas supply pipe 10, and the suction air container 26 is connected to the vacuum chamber 13.
The snift chamber 24 is connected to a snift introduction chamber 29 provided around the lower fixed pipe 1 through a pipe 30, and the snift introduction chamber 29 is connected to the atmosphere through a pipe 31. are doing.

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 the pressurized air chamber 11 via a pipe 33.

The piston 20 is fixed and has an upper end connected to the stepped through hole 1.
A filling valve chamber 17 is fixed to the lower end of the piston rod 34 which is fitted to the piston rod 9 so as to be slidable up and down.
The piston rod 34 is formed so that it can be raised and lowered by a lifting mechanism 18 provided in the filling head 16.

That is, the lifting mechanism 18 is a support frame 3 fixed to the filling head 16.
6, a lifting lever 37 that supports a 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, and the bending lever 38 is rotated clockwise by a spring 39. The roller 40 provided at the end of the long arm is regulated by a cam track 41, and the roller 42 at the end of the short arm fits into an arcuate guide hole 43 formed in the lift lever 37. There is.

Therefore, the filling head 16 is rotated and the roller 40 of the bending lever 38 is vertically restricted by the cam track 41, so that the piston rod 34 can be raised and lowered.

A filling liquid competitive supply hole 44 is provided in the upper tangential direction of the filling valve chamber 17, and the filling liquid supply hole 44 is connected to the lower part of the liquid distributor 3 through a universal joint 45, 45 and a liquid supply tube 46. At the same time, a flow valve 48 for opening and closing the filling hole 47 is provided inside the filling valve chamber 17 with a spring 49.
The vent tube 5 is provided so as to maintain an open state at all times, and a vent tube 5 communicating with the through hole 35 is provided at the center of the interior.
0 is provided so that it is energized downward by a spring 51.

However, the flow valve 48 and vent tube 50
cams 53 and 53 provided on the double operating rod 52 are formed so that they can engage freely at the same time, and when the cams 53 and 53 of the double operating rod 52 engage the flow valve 48 and the vent tube 50, is closed and the vent tube 50 is held in the raised position i, and when the engagement is released, the flow valve 48 is opened by the spring 49 and the vent tube 50 is projected downward by the spring 51.

In addition, in the figure, 54 is a seal pad provided at the lower edge of the filling valve chamber 17 and comes into contact with the mouth edge of the filling container A, 551 is an actuating device for the pressurized gas switching valve 22, 56 is a guide rail for the pressurized gas switching valve 22, 57 is an operating cam of 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 operating device for the double operating rod 52, and 61 is a guide rail for the double operating rod 52. .

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 supported by the elevating lever 37. - When the piston rod 34 is lowered and the seal pad 54 of the filling valve chamber 17 comes into contact with the mouth edge of the filling container chamber A, the deaeration switching valve 25 is first actuated by the actuating cam 57 and the stepped through hole] 9 The inside of the filling container A is connected to the suction air container 26, and the air inside the filling container A is connected to the vacuum pump 1.
2, vent tube 50, through hole 35, stepped through hole 19, suction air container 26, pipe 28 and vacuum chamber 13
Degassed through.

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 ] 9 to the pressurized gas distributor 23 and connect the pipe 27 and the pressurized gas. At the same time, the pressure inside the filling container A is increased to the same pressure as the inside of the liquid distributor 3 through the supply pipe 10, and the switching valve 32 is operated by the actuating device 58 to communicate the lower part of the piston of the cylinder 21 with the atmosphere, thereby causing the piston 20 to be connected to the atmosphere. The filling valve chamber 17 is pressurized to the filling container A through the piston rod 34 by applying pressure with the pressurized air at the upper part.

Next, the double actuating rod 52 is actuated by the actuating device 60, and its cams 53, 53 release the locking of the vent tube 50 and the flow valve 48, and the pens 1 to 50 are projected into the filling container A. 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.

Filling is performed and the liquid level in the filling container A closes the pens 1 to tubes 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 distribution container 3, and the liquid stops flowing down. Then, the double operating rod 52 returns and raises the vent tube 50, and at the same time, the flow valve 48 closes and the liquid in the vent tube 50 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 switched. The valve 32 is also switched to connect the upper and lower parts of the piston 20 of the cylinder 21 to the filling valve chamber 17.
After releasing the pressurizing action on the filling container A, the lifting mechanism 18 raises the piston rod 34 to open the filling valve chamber]
7 is separated from the filling container A, and the filling operation is completed.

However, 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 thereof, and further to the liquid distributor. In this case, the differential pressure control device 5 controls the pressure control valve 9 to adjust the water head in the liquid distributor 3. The pressure is always controlled and maintained at a constant pressurized state.

The present invention is a counter-pressure liquid filling machine in which the filling valve chamber moves up and down and comes in contact with the filling container to fill the container. The pen 1~tube, which is energized downward by the spring, and the flow valve, which is energized to open by the spring, are respectively locked against the spring, so that filling can be done by controlling the double actuating rod. The vent tube and flow valve are operated simultaneously in the valve chamber, and during filling, the vent tube is made to protrude into the filling container and the flow valve is opened.After filling, the flow valve is closed and the vent tube is moved to lower the liquid level of the filling container. Not only can this prevent the consumption of a large amount of pressurized gas as in the conventional method by allowing the liquid in the vent tube to flow down naturally, but the configuration can also be significantly simplified. For cleaning, the cleaning water only needs to be circulated within the filling valve chamber, and the cleaning liquid does not enter other parts such as the pressurized cylinder, unlike in the past, so it has the excellent feature of being extremely easy to handle. .

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view of an embodiment of the present invention, FIG. 2 is a side view of the same essential part, and FIG. 3 is a cross-sectional plan view of the same essential part. 14... Filling device, 16... Filling head, 17... Filling valve chamber, 18 Lifting mechanism, 48...
...flow valve, 49... spring, 50...
...Bent tube, 51... Spring, 52
...Double operating rod, 53...cam.

Claims (1)

[Claims] 1. A 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 so that the filling valve chamber can come into contact with the filling container, and a vent tube is provided in the filling valve chamber so that it can be raised and lowered so that it can be vented after filling is completed. In a reverse pressure type liquid filling machine in which a tube is raised and lowered from the liquid level of a filling container to cause liquid in a vent tube to flow down, the vent tube is energized by a spring so as to protrude downward from a filling valve chamber; The flow valve that opens and closes the filling hole in the filling valve chamber is provided with a spring that urges it upward, and a rotatable double operating rod provided in the filling valve chamber is provided with a spring that applies the vent tube and the flow valve, respectively. and a cam for holding the vent tube in the raised position, respectively, and an actuating device for actuating the double actuating rod to release the locking of the cam. A counter-pressure liquid filling machine with a vent tube lifting device.