JP3784299B2 - Filling nozzle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a filling nozzle.
[0002]
[Prior art]
Conventionally, a filling nozzle that fills containers with liquid, semi-solid cosmetics, pharmaceuticals, foods, and even adhesives with viscous and spinnable properties is compressed air from the nozzle opening at the end of filling. It was common to prevent stringing by jetting. However, according to the above-mentioned means, some contents are scattered by the compressed air jetted from the nozzle mouth, adheres to the mouth part of the container and its surroundings, and has the disadvantage of fouling, and the contents are pushed out and compressed. It was necessary to adjust the air injection operation each time depending on the properties of the contents, such as viscosity and stringiness.
[0003]
Therefore, the applicant of the present invention has a function of blocking and cutting at the end of filling as disclosed in Japanese Patent Publication No. 58-22402 as means for solving these drawbacks. An extremely effective filling nozzle that prevents the removal of the kite and the contamination of the container mouth due to the kite is provided.
[0004]
Further, as disclosed in Japanese Utility Model Publication No. 4-27761, the present applicant can easily and inexpensively change the diameter of the opening of the injection tube and can form various diameters of one filling nozzle. A possible filling nozzle was provided.
[0005]
[Problems to be solved by the invention]
However, these filling nozzles have a functional effect at the nozzle tip because of the structure, and therefore have a spindle in the center of the nozzle, and the content filled through the nozzle also contacts the spindle, particularly 10000 cP. When filling the contents having the above high viscosity, an operating resistance was generated in the spindle.
[0006]
Therefore, when the spindle is operated, friction is generated between the contents and the spindle, the contents are disturbed, and partial transformation occurs, or the contents are discharged by changing the operating speed of the spindle. Deterioration of filling accuracy due to inadequate cutting, timing of filling and cutting becoming unstable, or failure due to overloading of a pump that is a pressing device that pumps the contents into the filling nozzle due to defective valve operation Had problems such as.
[0007]
Accordingly, the present invention has been made in view of the above-described circumstances, and it is possible to reduce the operating resistance of the spindle even for highly viscous contents, and improve the filling accuracy of the contents and the excess of pumps and the like. It is an object to provide a filling nozzle capable of reducing load travel.
[0008]
[Means for Solving the Problems]
The present invention employs the following means in order to solve the above problems. That is, a nozzle body having a content introduction path, an injection pipe having one end joined to the nozzle body and a small-diameter opening at the other end, and at least the injection pipe. In a filling nozzle having a spindle provided with a stopper plug that fits in close contact with a small-diameter opening provided at the other end of the injection tube at the tip, the spindle is slidably included inside A filling nozzle characterized by having a spindle cover in the introduction path.
[0009]
In other words, due to the structure of the injection port that is a nozzle closing valve, a coating is provided at the portion of the spindle that penetrates through the contents and becomes the stopper of the closing valve so as to be in contact with the contents so that the area where the spindle and the contents are in contact with each other. It is an invention to reduce the load on the spindle as much as possible.
[0010]
The above-mentioned spindle cover is compressed by itself and is in close contact with the enclosing spindle, and needs to be strong enough to withstand the pressure of the contents so that it does not hinder sliding. As long as it is a material that can be used, materials such as metals and resins are not particularly mentioned.
[0011]
In addition, one end of the spindle cover has a sealing material fitted to the spindle at one end of the spindle cover inside the introduction path to hold the spindle in an airtight manner, and the other end is joined to the nozzle body. This prevents the contents from entering the spindle cover.
[0012]
With the above invention, it is possible to reduce the operating resistance of the spindle.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a filling apparatus 1 shown in FIG. 1 will be described as an embodiment of the present invention. The apparatus is configured for the purpose of injecting a high-viscosity liquid such as cosmetics, foods, and pharmaceuticals into a predetermined container.
[0014]
The filling device 1 includes, as main components, a hopper 2 that is a content input portion, a filling pump 3 that is a pressure feeding device, a switching valve 4 that switches a discharge passage of the content, and a filling nozzle 5 that fills a predetermined container with the content. It holds.
[0015]
As a method of filling the contents into a predetermined container, first, the contents are put into the hopper 2. The contents filled in the hopper move into the filling pump 3 through the switching valve 4.
[0016]
At this time, the contents are sucked into the pump by the filling pump 3, and the passage 6 in the switching valve 4 changes in synchronization with the phase of the piston 7.
[0017]
That is, when the filling pump 3 sucks the contents, a passage 6 in the switching valve 4 is installed as shown in FIG. 1, and the passage from the hopper 2 to the filling pump 3 is blocked by blocking the passage to the filling nozzle 5. Is forming.
[0018]
Thereafter, the passage 6 is switched as shown in FIG. 2 in a state where the displacement of the piston 7 in the filling pump 3 is maximized, and the passage from the filling pump 3 to the filling nozzle 5 is blocked by blocking the passage to the hopper 2 this time. By forming and pressurizing by the filling pump 3, the contents are sent to the filling nozzle 5.
[0019]
Next, the filling nozzle 5 will be described. As shown in FIG. 3, the filling nozzle 5 has the nozzle body 11 as a main body, the cylinder 12 is brought into close contact with the upper portion, and is fixed to the nozzle body 11 with a screw cap 14a. In addition, the injection tube 13 is fixed to the lower portion in the same manner as the cylinder 12 by a screw cap 14b. A small-diameter opening 15 is provided at the lower portion of the injection tube 13 to inject the contents.
[0020]
As shown in FIG. 4, a content introduction path 21 is formed in the filling nozzle 5 through the nozzle body 11 and the injection tube 13 . A piston 22 is fitted inside the cylinder 12, and a spindle 23 serving as a piston shaft is abutted and suspended at a lower portion of the piston 22. Compressed air is used as power for moving the piston 22, and the compressed air inflow holes 27 are formed in the upper part and the lower part of the side surface of the cylinder 12, respectively.
[0021]
A spindle 23 suspended from the piston 22 passes through a slide hole 29 formed in a spacer 24 sandwiched between the nozzle body 11 and the cylinder 12 and the inside of the spindle cover 25, and ends the injection tube 13. The end of the piston 22 is extended to the vicinity of the small-diameter opening 15, and when the piston 22 descends, the tip thereof is closely fitted with the small-diameter opening 15 to become a stopper of the stop valve. The operation range is that the end of the spindle 23 is the same as the end surface of the spindle cover 25 at the top dead center of the piston 22, and the end surface of the small-diameter opening 15 is at the bottom dead center as shown in FIG. To be identical.
[0022]
The spacer 24 has a sealing material 26a inside the sliding hole 29 and holds the spindle 23, thereby fixing the spindle 23 while being slidable. Further, a packing 28 is disposed on the surface where the spacer 24 is sandwiched so as to hermetically block the contents introduction path from the inside and outside of the cylinder.
[0023]
Similarly to the spacer 24, the spindle cover 25 has a sealing material 26b for holding and fixing the spindle 23, and the end of the end of the spindle cover 25 has an acute angle, and the seal that holds the spindle 25 at the acute angle portion. A material 26c is provided. With this sealing material 26 c, when the contents are fed by pressure, the contents adhering to the spindle 23 protruding outward from the spindle cover 25 are scraped off, and the contents entering the inside of the spindle cover 25 are blocked.
[0024]
Further, in order to prevent excessive contact with the spindle cover 25, the spindle 23 has a thinner central portion than both ends held by the sealing materials 26a, b, c, and the spindle cover 25 is somewhat distorted. Also avoid inadvertent contact. In contrast, the spindle cover 25 is also made of a material that does not deform with respect to the pressure generated by the pumping of the contents.
[0025]
The container is filled with the contents using the filling nozzle 5 as described above. At the time of filling, the shut-off valve composed of the spindle 23 and the small-diameter opening 15 and the pressure feeding from the filling pump are synchronized.
[0026]
That is, the closing valve is opened and the pumping from the filling pump 3 is started. When a predetermined amount is injected into the container filled with the contents, the pumping from the filling pump 3 is stopped and the closing valve is closed as shown in FIG. To do.
[0027]
At this time, since the spindle 23 serving as the opening / closing means of the closing valve is located inside the spindle cover 25, the area in contact with the contents is small, and as a result, the resistance when sliding is reduced and the closing without delaying the operation of the filling pump 3 is achieved. The valve can be opened and closed.
[0028]
【The invention's effect】
By carrying out the present invention, it is possible to reduce the sliding resistance of the spindle that is the closing plug of the filling nozzle, and to stabilize the sliding speed of the spindle. Further, since the contents in the introduction path are not disturbed by the sliding of the spindle, the extrusion amount per unit time of the contents extruded from the small-diameter opening becomes stable.
[0029]
Further, since the resistance of the spindle is reduced, it becomes easy to synchronize the pressurization control for pumping the contents performed by the filling pump and the control for opening / closing the closing valve of the filling nozzle, so that the filling device As a whole, the stability is increased, and it is possible to reduce damage to the machine due to overload or the like generated by the malfunction of the pressurization control and the open / close control.
[Brief description of the drawings]
FIG. 1 is a schematic view of a filling apparatus according to the present embodiment.
FIG. 2 is a schematic view of a filling device according to the present embodiment.
FIG. 3 is a side view of a filling nozzle according to the present embodiment.
FIG. 4 is a cross-sectional view of a filling nozzle according to the present embodiment.
FIG. 5 is a cross-sectional view of the filling nozzle according to the present embodiment when closed.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Filling device 2 Hopper 3 Filling pump 4 Switching valve 5 Filling nozzle 6 Passage 7 Piston 11 Nozzle body 12 Cylinder 13 Injection pipe 14a Screwing cap 14b Screwing cap 15 Small diameter opening 21 Introduction path 22 Piston 23 Spindle 24 Spacer 25 Spindle cover 26a Seal Material 26b Seal material 26c Seal material 27 Compressed air inflow hole 28 Packing 29 Sliding hole

Claims (2)

A nozzle body having a content introduction path;
One end is joined to the nozzle body, and the other end is provided with an injection tube having a small-diameter opening, and at least at the inside of the injection tube is provided so as to be able to move forward and backward, and a stopper plug that closely fits the small-diameter opening of the injection tube A filling nozzle having a spindle with
Have a spindle cover tubular and inclusions slidably said spindle therein,
The filling nozzle according to claim 1, wherein a tip end of the spindle cover is positioned inward of the injection tube from the small diameter opening .   In the filling nozzle,
  One end of the spindle cover has a sealing material to be fitted to the spindle,
  The filling nozzle according to claim 1, wherein the other end of the spindle cover is joined to the nozzle body.

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