JP2003137217A - Filling nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem such that in a filling nozzle having a spindle serving as a stopper to be passed through an inlet passage of contents to be filled for opening/closing a shutoff valve of the contents, the shutoff valve is unstably opened/closed as the contents attach to the spindle to be resistance. SOLUTION: A spindle cover 25 is provided between a spindle 23 serving as a stopper and contents to cover the spindle 23, and only a movable range of the spindle 23 is brought out of the cover 25 to close a valve, thereby reducing an area where the spindle 23 is in contact with the contents. Thus, resistance applied to the spindle 23 is reduced, so that a shutoff valve can be opened/closed stably.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a filling nozzle.

[0002]

2. Description of the Related Art Conventionally, a filling nozzle for filling containers such as liquid, semi-solid cosmetics, pharmaceuticals, foods, and adhesives having viscosity and spinnability at the end of filling. In general, compressed air was jetted from a nozzle opening to prevent stringing. But according to the above means
There is a drawback that some of the contents are scattered by the compressed air jetted from the nozzle port and adhere to the mouth of the container and its surroundings to be contaminated, and the push-out operation and the compressed air injection operation of the contents It was necessary to adjust each time according to the physical properties such as viscosity and spinnability.

Therefore, the applicant of the present invention has a function effect of shutting off and cutting at the end of filling as disclosed in Japanese Patent Publication No. 58-22403, as a means for solving these drawbacks. An extremely effective filling nozzle that removes the towed string from the opening and prevents the container from being contaminated by the towed string.

Further, as disclosed in Japanese Utility Model Publication No. 4-27761, the applicant of the present invention can easily and inexpensively change the diameter of the opening portion of the injection pipe, and the diameter of one filling nozzle can be varied. Provided is a filling nozzle that can be formed into one.

[0005]

However, since these filling nozzles structurally require a functional effect at the tip of the nozzle, they have a spindle at the center of the nozzle and the contents to be filled through the inside of the nozzle. Also comes into contact with the spindle, and in particular, when the contents having a high viscosity of 10,000 cP or more are filled, operating resistance occurs in the spindle.

Therefore, when the spindle operates, friction is generated between the content and the spindle, the content is agitated, partial transformation occurs, and the operating speed of the spindle changes, so that the content Of the pump, which is a pressing device that pressure-feeds the contents into the filling nozzle due to poor cutting accuracy when discharging the product, deterioration of the filling accuracy due to unstable timing between filling and cutting, or defective valve operation. There was a problem such as breakdown due to load.

Therefore, the present invention has been made in view of the above-mentioned circumstances, and it is possible to reduce the operating resistance of the spindle even for highly viscous contents, and to improve the filling accuracy of contents and the pump. It is an object of the present invention to provide a filling nozzle that can reduce overload travel due to the above.

[0008]

The present invention adopts the following means in order to solve the above problems. That is, a nozzle body having an introduction path for the contents, an injection pipe having one end joined to the nozzle body and a small-diameter opening at the other end, and at least an injection pipe, which moves forwards and backwards inside the nozzle body depending on the design. A filling nozzle having a small diameter opening provided at the other end of the injection pipe and a spindle having a closing plug closely fitted to the distal end of the filling pipe, which is drivably provided, and slidably includes the spindle therein. The filling nozzle is characterized by having the above spindle cover in the introduction path.

In other words, due to the construction of the injection port which is the closing valve of the nozzle, a coating is provided on the spindle which penetrates the contents and serves as the stopper of the closing valve, at the portion in contact with the contents, so that the spindle and the contents are This is an invention in which the contact area is made as small as possible and the load on the spindle is reduced.

The above-mentioned spindle cover itself must be compressed to come into close contact with the spindle contained in the package, and must have at least a strength to withstand the pumping pressure of the contents so as not to hinder sliding. As long as the material can withstand pressure, it does not particularly mention materials such as metal and resin.

In addition, one end of the spindle cover has a seal member for fitting with the spindle at one end of a spindle cover provided inside the introduction path for holding the spindle in an airtight manner, and the other end is provided with a nozzle body. The joining prevents the contents from penetrating into the inside of the spindle cover.

With the above invention, it is possible to reduce the operating resistance of the spindle.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION A filling apparatus 1 shown in FIG. 1 will be described below as an embodiment of the present invention. The device is configured for the purpose of injecting a highly viscous liquid such as cosmetics, food and medicine into a predetermined container.

The filling device 1 is mainly composed of a hopper 2 which is a loading position of contents, a filling pump which is a pressure feeding device 3, a switching valve which switches a discharge passage of the contents 4, a filling which fills a predetermined container with the contents. It consists of nozzles 5.

As a method of filling the contents into a predetermined container, the contents are first put into the hopper 2. The contents filled in the hopper pass through the switching valve 4 and the filling pump 3
Move in.

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.

That is, when the filling pump 3 sucks the contents, the passage 6 in the switching valve 4 is installed as shown in FIG. 1, and the passage to the filling nozzle 5 is cut off to connect the hopper 2 to the filling pump 3. Form only the passage.

After that, 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 this time, the passage to the hopper 2 is cut off and from the filling pump 3 to the filling nozzle 5. The contents are sent to the filling nozzle 5 by forming the passage of the above and being pressurized by the filling pump 3.

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, and the cylinder 12 is closely contacted and abutted on the upper portion thereof, and the screw cap 14a is provided.
Is fixed to the nozzle body 11. In addition, the injection pipe 13 is screwed into the lower portion by a screw cap 14b so that the cylinder 12
Stick as well as. Further, the injection pipe 13 has a small-diameter opening portion 15 at the lower part, by which the contents are injected.

As shown in FIG. 4, an introduction path 21 for the contents is formed in the filling nozzle 5 through the nozzle body 11 and the injection pipe 14. A piston 22 is fitted into the inside of the cylinder 12, and a spindle 23 serving as a piston shaft is abutted and vertically provided below the piston 22. This piston 22
Compressed air is used as the power for moving the cylinders, 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.

Spindle 23 suspended from piston 22
Is inserted into the sliding hole 29 formed in the spacer 24 sandwiched between the nozzle body 11 and the cylinder 12 and the spindle cover 25, and extends to the vicinity of the small diameter opening 15 at the end of the injection pipe 13. When the piston 22 descends, its tip closely fits with the small-diameter opening 15 to form a closing valve plug. The operating range of the spindle 23 is that the end of the spindle 23 is at the top dead center of the piston 22.
5 and the end surface of the small-diameter opening 15 at the bottom dead center as shown in FIG.

The spacer 24 has a seal member 26a inside the sliding hole 29 and holds the spindle 23, thereby fixing the spindle 23 while allowing the spindle 23 to slide. A packing 28 is arranged on the surface where the spacer 24 is held so as to hermetically block the introduction path of the contents from the inside and outside of the cylinder.

A seal member 26 for holding and fixing the spindle 23 to the spindle cover 25 as well as the spacer 24.
b, and at the tip of the end portion thereof, there is provided a sealing material 26c for holding the spindle 25 at the acute angle portion with the acute angle. When the contents are pressure-fed, the sealing material 26c wipes off the contents adhering to the spindle 23 protruding from the spindle cover 25 and shuts off the contents penetrating into the spindle cover 25.

In addition, the spindle 23 has a sealing material 26 to prevent excessive contact with the spindle cover 25.
The central portion is made thinner than the both end portions held by a, b, and c so that even if the spindle cover 25 is slightly distorted, it does not come into inadvertent contact. On the other hand, the spindle cover 25 is also made of a material that is not deformed by the pressure generated by pumping the contents.

The contents are filled in each container using the filling nozzle 5 constructed as described above. Spindle 23 when filling
And the shut-off valve consisting of the small-diameter opening 15 and pressure feeding from the filling pump are synchronized.

That is, the shut-off valve is opened and pressure feeding from the filling pump 3 is started. When a predetermined amount is injected into the container filled with the contents, the pressure feeding from the filling pump 3 is stopped and the valve is closed as shown in FIG. Close the valve.

At this time, since the spindle 23 which is the opening / closing means of the shutoff valve is inside the spindle cover 25, the area in contact with the contents is small, and as a result, the resistance related to sliding is reduced and the operation of the filling pump 3 is delayed. It is possible to open and close the shut-off valve.

[0028]

According to the present invention, it is possible to reduce the sliding resistance of the spindle, which is the closing plug of the filling nozzle, and stabilize the sliding speed of the spindle. Further, since the content in the introduction path is not disturbed by the sliding of the spindle, the extrusion amount of the content extruded from the small diameter opening per unit time becomes stable.

Further, since the resistance of the spindle is reduced, it becomes easy to synchronize the pressurization control for pressure-feeding the contents with the filling pump and the control of the opening / closing of the closing valve of the filling nozzle. Therefore, the stability of the filling device as a whole is increased, and it is possible to reduce the damage to the machine due to overload or the like caused by the malfunction of the pressurization control and the opening / closing control.

[Brief description of drawings]

FIG. 1 is a schematic view of a filling device 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 the filling nozzle according to the present embodiment.

FIG. 4 is a 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 it is closed.

[Explanation of symbols]

1 filling device 2 hoppers 3 filling pump 4 switching valve 5 filling nozzles 6 passages 7 pistons 11 Nozzle body 12 cylinders 13 injection tube 14a Screw cap 14b screw cap 15 Small diameter opening 21 Introduction route 22 pistons 23 spindles 24 spacer 25 Spindle cover 26a Seal material 26b Seal material 26c sealing material 27 Compressed air inflow hole 28 packing 29 sliding holes

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 3E055 AA02 BB01 CA08 DA10 DA16                       DA20                 3E079 AA07 BB01 BB03 CC12 DD06                       DD35

Claims (2)

[Claims] 1. A nozzle main body having a passage for introducing contents, an injection pipe having one end joined to the nozzle main body and a small diameter opening at the other end, and a tip provided at least inside the injection pipe so as to be able to move forward and backward. A filling nozzle having a spindle having a closing plug closely fitted to the small-diameter opening of the injection pipe, the filling nozzle having a spindle cover slidably enclosing the spindle therein. 2. The filling nozzle according to claim 1, wherein one end of a spindle cover has a seal member fitted to the spindle, and the other end of the spindle cover is joined to the nozzle body. Filling nozzle.