JPH0966902A - Liquid drooling-preventing device for filling nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a liquid drooling from generating in a filling nozzle to perform a submerged filling. SOLUTION: A filling nozzle 6 is made to pass through in a nozzle guide 66, and vertically moved by a vercial moving means. At a leading end larger diameter part 6a of the filling nozzle 6, an annular groove 6b is formed, and an O ring 70 is fitted in the annular groove 6b. When the filling nozzle 6b is raised, the O ring 70 is fitted in the nozzle guide 66, and tightly joined to the inner peripheral surface. At the time of filling, the filling nozzle 6 is lowered along the nozzle guide 66, and inserted in a container being placed below. When the filling is completed, the filling nozzle 6 is immersed in a liquid. Then, when the filling nozzle is raised, the O ring is fitted in the nozzle guide 66, and a space between the outer peripheral surface of the filling nozzle 6 and the inner peripheral surface of the nozzle guide 66 is sealed. By doing so, a liquid adhered to the external surface of the filling nozzle 6 because of the submerged filling is sealed by the O ring 70, and is prevented from dropping downward.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filling nozzle of a filling machine, and more particularly to a liquid of a filling nozzle for preventing the liquid adhering to the filling nozzle of a filling machine for filling the liquid at the end of filling from dropping. It relates to an anti-drip device.

[0002]

2. Description of the Related Art A filling machine generally includes a filling liquid tank for storing a liquid to be filled, a filling nozzle for inserting the liquid supplied from the filling liquid tank into the container, a filling liquid tank and a filling nozzle. And a filling liquid valve that opens and closes the liquid passage between the containers.When the filling machine fills the container with liquid, it is required that the liquid level of the filling liquid in each container be at the same level. It

Therefore, the filling machine is usually provided with a mechanism for keeping the liquid level of the liquid filled in the container constant. For example, in the case of a filling machine of the type in which the mouth of the container is sealed with a bottle packing, the air inside the container must be discharged as the liquid is filled into the container. An air tube for exhaust is provided in addition to the filling nozzle for filling. In this seal type filling machine, the air in the container is discharged according to the amount of the filled liquid, and the filled liquid rises in the container and its liquid level reaches the lower end of the air tube. When the height of the exhaust port provided is reached, the exhaust port is closed and exhaust is not performed, so that the inflow of the liquid from the filling nozzle is stopped and the filling is completed. That is, the liquid level height at the end of filling is determined by the position of the exhaust port of the air tube.

On the other hand, in the filling machines other than the above-mentioned seal type, a sensor for detecting the liquid level of the filling liquid in the container is separately provided, and the sensor gradually raises as the filling of the liquid in the container progresses. When the liquid level is sensed, the filling liquid valve is closed to complete the filling.

By the way, in a general construction of a filling machine equipped with such a sensor for detecting the liquid level, the tip of the filling nozzle is inserted into the upper part of the container, and the filling liquid valve is opened to perform filling. The above-mentioned sensor detects the liquid level rising with the inflow of the filling liquid, confirms that the liquid level of the filling liquid has reached a predetermined level, and closes the filling liquid valve to complete the filling. In this way, when the filling port at the tip of the filling nozzle is located in the upper part of the container for filling, the liquid flowing into the container drops from a higher position and is foamed. In some cases, it was mistaken for a surface and the filling was ended. Therefore, in order to prevent the liquid filled in the container from foaming as described above, the tip of the filling nozzle is inserted up to near the bottom of the container,
A filling machine adapted to perform submerged filling has been known in the past.

[0006]

However, when filling is performed with the tip of the filling nozzle inserted until it reaches near the bottom of the container, at the end of filling, there are many portions that are immersed in the filling liquid of the filling nozzle. Therefore, when the filling nozzle is pulled out from the container after completion of the filling, there is a problem that the liquid attached to the outer surface of the filling nozzle drips and contaminates the container or its periphery.

Further, in order to solve the above-mentioned problem caused by the liquid dripping from the filling nozzle, the filling nozzle of the liquid level following type is designed so as to rise in accordance with the rise of the filled liquid level. Is already known. In this filling machine, the tip of the filling nozzle is kept slightly submerged in the liquid,
Since the filling nozzle is raised as the liquid level rises, the amount of liquid adhering to the outer surface of the filling nozzle at the end of filling is small, and the above problems can be almost eliminated. The formula-type structure has a drawback that the elevating mechanism of the filling nozzle is complicated and the cost is high, and it is difficult to use it for various containers.

The present invention has been made in order to eliminate the above-mentioned drawbacks, and a filling nozzle capable of filling a liquid with a simple structure and preventing the dripping of the filling liquid adhering to the filling nozzle after the filling is completed. It is an object of the present invention to provide a dripping prevention device.

[0009]

SUMMARY OF THE INVENTION A dripping prevention device for a filling nozzle according to the present invention is a filling nozzle that is inserted into a container to fill the liquid, an elevating means for moving the filling nozzle up and down, and the filling nozzle. And a cylindrical fixed guide that guides the ascent and descent of the filling nozzle, and is provided in a filling machine that performs filling with the filling nozzle inserted in the liquid. Surface and the inner peripheral surface of the fixed guide when the sealing member is fitted to either one of the surface and the fixed guide, and when the filling nozzle is raised after completion of the filling, the outer peripheral surface of the filling nozzle and the inner peripheral surface of the fixed guide by the sealing member. By sealing and, the liquid attached to the outer surface of the filling nozzle is prevented from dripping.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings. 1 is a front view of a part of a dripping prevention device of a filling nozzle according to an embodiment of the present invention, FIG.
FIG. 3 is a vertical cross-sectional view showing an enlarged main part thereof (the tip portion of the filling nozzle), and FIG. 3 is a front view showing a driving portion of the filling nozzle. Note that FIG. 1 is an enlarged view of the left side view of FIG.
Two guide posts 22 and 24 are fixed upright on the base 20, and a horizontal fixing plate 26 is attached to a substantially middle portion of the guide posts 22 and 24. Above the fixed plate 26 of both the guide posts 22 and 24, the elevating cylinders 28 and 30 are respectively provided with the ball bush 28.
It is slidably fitted through a and 30a. Horizontal elevating plates 32 are fixed to the outer surfaces of the elevating cylinders 28, 30 on both sides, and as the elevating plate 32 moves up and down, the elevating cylinders 28, 30 move up and down. A through hole 32a is formed in the center of the elevating plate 32, and a cylindrical member 34 having a flange 34a at the lower end is fitted therein. This cylindrical member 34
The spring 3 between the upper end of the
6 is interposed to constantly urge the cylindrical member 34 upward. A rod 38 is fixed inside the cylindrical member 34, and a connecting rod 42 is connected to a lower end of the rod 38 via a joint 40. By ascending and descending the connecting rod 42, the rod 38, the cylindrical member 34, Lift plate 32 and both lift cylinders 28,
30 is guided by the two guide posts 22 and 24 and moves up and down integrally.

The elevating means 43 for elevating the elevating plate 32 is constructed as follows. The lower end of the connecting rod 42 is connected to a swing end 46a of a long lever 46 that swings around a fulcrum 44. In addition, the middle portion 46b of the long lever 46 has another fulcrum 48.
Is connected to the tip of a short lever 50 that swings about the center of the lever via a connecting rod 52. When the short lever 50 swings,
This swing is transmitted through the connecting rod 52, and the long lever 46 swings. A cam follower 54 is attached to the tip of the short lever 50, and the cam follower 54 is engaged in the cam groove 58 of the cam 56 having the shape shown in FIG. This cam 56 is a cam curve (cam groove 5
8), the cam follower 54 moves along the cam curve 58, so that the short lever 5
0 swings about a fulcrum 48, and further, a long lever 46 swings via a connecting rod 52 to swing the connecting rod 4
Raise and lower 2.

A filling nozzle 6 is attached to the outer edge of the elevating plate 32. The filling nozzle 6 is connected to a filling liquid tank (not shown) via an upper elastic tube 60 and a liquid supply hose 62, and by opening and closing a liquid valve 64 provided in the elastic tube 60, The filling liquid sent from the filling liquid tank is filled in the container 10. In this embodiment, the liquid valve 6 of the filling nozzle 6
4 is opened by a timer for a predetermined period of time, during which the liquid is filled. The liquid valve 64 of the filling nozzle 6 for performing this timer filling is
For example, a pinch valve or the like is used that presses the tube 60 made of an elastic material such as rubber by pressing members on both sides to close the internal passage and closes it, and releases the pressing members to open the internal passage. You can

The filling nozzle 6 is inserted through a nozzle guide 66 that is attached through the fixed plate 26, and the lifting plate 43 is operated by the operation of the lifting means 43.
When moving up and down together with 2, the vertical movement is guided by these nozzle guides 66. The filling nozzle 6 has a large diameter portion 6a formed at its tip (lower end), an annular groove 6b is provided on the outer peripheral surface thereof, and a seal member 70 is fitted in the annular groove 6b. The inner diameter of the nozzle guide 66 is slightly larger than the outer diameter of the large-diameter portion 6a of the filling nozzle 6, and the seal member 70 fitted to the outer surface of the large-diameter portion 6a of the filling nozzle 6 serves as the nozzle guide 66. When it adheres to the inner surface,
The outer peripheral surface of the large diameter portion 6a of the filling nozzle 6 and the nozzle guide 66
The inner peripheral surface of the is sealed. The filling nozzle 6 has an injection port 6c formed slightly above the large diameter portion 6a. When the liquid valve 64 is opened, the liquid in the filling liquid tank flows into the container 10 through the injection port 6c. To do. The inner peripheral surface 66a of the lower end of the nozzle guide 66 is
Is tapered, and the seal member 70 fitted to the outer circumference of the large diameter portion 6a of the ascending filling nozzle 6 is
The edge of the inner peripheral surface of the lower end portion of the nozzle guide 66 is not damaged. In addition, the sealing member 70
As such, an O-ring, various ring packings having different cross-sectional shapes, lip packing, or the like can be used.

Next, the operation of the filling device having the above structure will be described. In this embodiment, the container 10 is intermittently transferred by a container transfer means (not shown) and sent to the filling position.
It stops at the filling position below the filling nozzle 6. The cam 5 of the elevating means 43 is synchronized with the operation of the container carrying means.
While the container 6 conveyed by the container conveying means is stopped, the cam follower 54 passes through the descending portion 58a of the cam groove 58 from the upper portion 58d side to the lower portion 58.
It moves to the b side (refer to FIG. 5), and accordingly, the connecting rod 42 and the elevating plate 32 descend.

When the elevating plate 32 descends, the filling nozzle 6 fixed to the elevating plate 32 integrally descends, and the tip of the filling nozzle 6 is inserted into the container 10 stopped at the lower filling position. To be done. After that, the lifting means 4
While the cam follower 54 of No. 3 is moving on the lower side 58b side of the cam groove 58, the liquid valve 64 of the filling nozzle 6 is opened. In this embodiment, the liquid valve 64 of the filling nozzle 6 is opened and closed by a timer, and the liquid valve 64 is closed after a predetermined time has elapsed after being opened. The apparatus of the present embodiment is designed to fill the liquid, and when the liquid valve 64 is closed, the liquid level 72 is positioned above the liquid injection port 6c of the filling nozzle 6 as shown in FIG. are doing.

After the liquid valve 64 is closed, the cam follower 54 of the elevating means 43 passes through the ascending portion 58c of the cam groove 58 to elevate the ascending / descending plate 32 and the filling nozzle 6. The filling nozzle 6 moves up through the upper nozzle guide 66, and stops at the position where the large-diameter portion 6a at the tip of the filling nozzle 6 is fitted into the nozzle guide 66 (state in FIG. 2). The seal member 70 fitted on the outer circumference of the filling nozzle 6 is in close contact with the inner peripheral surface of the nozzle guide 66 to seal between the outer peripheral surface of the filling nozzle 6 and the inner peripheral surface of the nozzle guide 66. Since the filling is performed in the liquid as described above, the filling liquid adheres to the outer periphery of the portion immersed in the liquid during the filling of the filling nozzle 6, but is fitted to the lower end of the filling nozzle 6. Since it is sealed by the sealing member 70, the attached liquid does not drop downward. Therefore, there is no risk of contaminating the surroundings of the lower container 10 and the filling device. in this way,
In the filling nozzle according to the above-mentioned embodiment, since the filling can be performed in the liquid with an extremely simple structure, it is possible to suppress the foaming of the liquid filled in the container 10, and
It is possible to prevent dripping from the filling nozzle.

FIG. 6 is a view showing the main part (tip of the filling nozzle) of the liquid drop prevention device for the filling nozzle according to the second embodiment. In this embodiment, the large diameter portion 106a of the tip of the filling nozzle 106 is shown. There is no seal member on the inner surface of the nozzle guide 166, and an annular groove 166b is formed on the inner peripheral surface of the lower portion of the nozzle guide 166.
A seal member 170 is fitted in 66b. Also in this embodiment, when the filling nozzle 106 rises and fits into the nozzle guide 166 after the completion of filling, the large diameter portion 106a of the filling nozzle 106 comes into close contact with the seal member 170 on the nozzle guide side, and the gap between the two 106, 166 is maintained. Seal it. Therefore, similarly to the first embodiment, the liquid attached to the outer peripheral surface of the filling nozzle 106 does not drop downward due to the liquid filling, and the liquid filling can be performed with a simple configuration.

[0018]

As described above, according to the present invention, a filling nozzle which is inserted into a container to fill a liquid, an elevating means for moving the filling nozzle up and down, and the filling nozzle which is inserted and raised. And a cylindrical fixed guide for guiding the filling machine, wherein the filling nozzle performs filling in a state where the filling nozzle is inserted in a liquid, in either one of the outer peripheral surface of the tip of the filling nozzle and the inner peripheral surface of the fixed guide. When the sealing member is fitted and the filling nozzle is lifted after the filling is completed, the sealing member seals between the outer peripheral surface of the filling nozzle and the inner peripheral surface of the fixed guide. It is possible to fill the inside of the container with liquid, and prevents the liquid from adhering to the outer surface of the filling nozzle while filling the next container after filling the inside of one container. By doing That.

[Brief description of drawings]

FIG. 1 is a front view in which a part of a dripping prevention device for a filling nozzle according to an embodiment of the present invention is shown in section.

FIG. 2 is a longitudinal cross-sectional view showing an enlarged main part (tip portion of the filling nozzle) of the dripping prevention device of the filling nozzle.

FIG. 3 is a front view showing an elevating means of the filling nozzle.

FIG. 4 is a front view of a cam that raises and lowers a filling nozzle.

FIG. 5 is a diagram showing a developed cam curve of the cam.

FIG. 6 is a vertical cross-sectional view showing an enlarged main part (tip portion of the filling nozzle) of the liquid dripping prevention device for the filling nozzle according to the second embodiment.

[Explanation of symbols]

 6 Filling nozzle 10 Container 43 Elevating means 66 Fixed guide 70 Seal member 166 Fixed guide

Claims (1)

[Claims] 1. A filling nozzle that is inserted into a container to fill a liquid, an elevating unit that elevates and lowers the filling nozzle, and a cylindrical fixed guide that inserts the filling nozzle and guides the elevation. In a filling machine that performs filling with the filling nozzle inserted in the liquid, a sealing member is fitted to either the outer peripheral surface of the tip of the filling nozzle or the inner peripheral surface of the fixed guide, and filling is performed after the filling is completed. When the nozzle is raised, the sealing member seals the outer peripheral surface of the filling nozzle and the inner peripheral surface of the fixed guide to prevent the liquid adhering to the outer surface of the filling nozzle from dripping. A device to prevent dripping of the filling nozzle.