JP3939432B2 - Liquid filling nozzle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a filling nozzle used in a filling machine for filling a container with a liquid material such as a beverage and a liquid seasoning.
[0002]
[Prior art]
As a filling nozzle in a filling machine for quantitatively filling liquids such as beverages such as milk and fruit juice and liquid seasonings such as dressing, soy sauce and sauce, the structure described in Japanese Patent Publication No. 60-24026 Is commonly used.
[0003]
In the conventional filling nozzle, an opening / closing element for opening and closing the lower end of the nozzle is provided at the lower end of the supply pipe inserted into the nozzle, and the upper end of the supply pipe is formed by a piston rod of a cylinder connected to the upper portion of the nozzle body. When the cylinder is operated and the supply pipe is pushed down, the switch comes out of the lower end of the nozzle and the liquid material supplied from the side of the nozzle is discharged. It is made so that. When the operation of the cylinder is stopped, the supply pipe is raised and returned by the spring, and the opening / closing element enters the lower end of the nozzle to stop the discharge, so that there is no dripping when the discharge of the liquid material is stopped. .
[0004]
[Problems to be solved by the invention]
However, in the above prior art, the piston rod of the cylinder that drives the opening / closing of the switch and the supply pipe are connected in series, and the movement of the piston rod is directly transmitted to the supply pipe to move the supply pipe up and down. Therefore, it was difficult to disassemble during maintenance, and internal cleaning was difficult.
[0005]
In addition, since the supply pipe penetrates the partition wall that divides the liquid supply path and the cylinder side, wear of the sliding portion between the partition wall and the supply pipe occurs, which may cause a failure, or There were problems such as contamination of foreign particles such as metal wear powder and packing debris.
[0006]
[Means for Solving the Problems]
The present invention provides a liquid filling nozzle that is easy to disassemble, clean, and assemble, and has no risk of troubles such as failure due to wear caused by the connecting structure with the driving means and contamination of foreign matters associated therewith. It was made as an issue.
[0007]
As a means for solving the above-mentioned problems, the present invention is such that the liquid filling port of the nozzle body can be opened and closed by an opening / closing element at the tip of a suspension rod provided in the nozzle body so as to be movable up and down, and the opening / closing element is opened. In the filling nozzle for discharging the liquid material from the filling port of the nozzle main body, a follower magnetic body is provided at the upper part of the suspension rod inserted into the nozzle main body, and the cover is provided on the side of the nozzle main body A drive magnetic body is mounted so as to be movable up and down, and a drive means for moving the drive magnetic body up and down is provided on the cover, and at least one of the magnetic bodies is a magnet ,
The opening / closing element has a substantially triangular pyramid shape, its bottom surface is formed in a concave spherical shape, and its outer peripheral surface and the bottom surface are communicated with each other through a fine pore, and is connected to the nozzle body in a liquid state. The body supply device can be reversely fed.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to embodiments shown in the drawings.
FIG. 1 shows a liquid filling machine equipped with a filling nozzle 1 according to the present invention. The filling nozzle 1 is supported so as to be movable up and down along a guide 4 on one side of a column 3 standing on a stand 2. The support arm 5 is fixed to the tip of the arm 5 and can be moved up and down via a screw mechanism or the like by a motor 6 (servo motor) installed on the support column 3 and conveyed to a position directly below the filling nozzle 1. The filling nozzle 1 is raised and lowered via the support arm 5 in accordance with the height of the container 7 such as a bottle.
[0010]
The filling nozzle 1 is shown in a perspective view in FIG. 2 in appearance and in a cross-sectional view in FIG. 3, and as shown in FIG. A liquid material flow passage 9 is formed so as to penetrate in a direction, and an elongated nozzle 10 having an outer diameter that can be inserted into the mouth portion 7a of the container 7 is connected to the lower portion thereof by a joint portion 11.
[0011]
A liquid material such as a hose that feeds the liquid material from the hopper 13 shown in FIG. 1 by a pump 14 that is a liquid material supply device is connected to the connection portion 12 at the upper end of the nozzle body 1 where the upper end of the liquid material channel 9 is open. A supply pipe 15 is connected.
[0012]
A cover 16 is attached to the upper side of the nozzle body 8 so as to be detachable from the side surface of the nozzle body 8.
[0013]
The cover 16 in this embodiment has a hollow portion 17 having a substantially semicircular horizontal cross section with one side open, and a bearing portion 18 formed at the lower end of the cover 16 and a bearing portion 19 of the nozzle body 8. Is pivotally attached by a pin 20, and the cover 16 can be rotated as shown by a chain line in FIG. 1 with the pin 20 as a fulcrum, and when it is moved along the side of the nozzle body 8, FIG. , The lock pin 21 spring-biased in the direction of the arrow a is fitted into the notch recess 22 of the cover 16 so as to be non-rotatably locked.
[0014]
The peripheral wall 23 of the nozzle body 8 at a portion where the open surface of the hollow portion 17 of the cover 16 faces is formed thin enough to withstand the pressure of the liquid material flowing down the liquid material flow path 9.
[0015]
A suspension rod 24 is inserted into the liquid material channel 9 so as to partially protrude from the tip of the nozzle 10, and the upper end thereof has a cross-sectional area considerably smaller than the cross-sectional area of the channel 9. The lower end of the columnar follower magnetic body 25 is connected.
[0016]
A driving magnetic body 26 having a shape obtained by dividing the cylindrical body into two in the axial direction is inserted into the hollow portion 17 of the cover 16 so as to be movable in a vertical direction over a predetermined stroke. The curved surface portion 26a is formed to slide as close as possible to the outer surface of the peripheral wall 23 of the nozzle body 8.
[0017]
Each of the magnetic bodies 25 and 26 is composed of a magnet arranged so that the poles attracting each other are opposed to each other with the peripheral wall 23 interposed therebetween, or one of them is a magnet and the other is a magnet attracted by the magnet. Consists of the body. The magnet may be an electromagnet that generates a magnetic force only when energized. Since the driven magnetic body 25 is placed in the liquid, as shown in a sectional view in FIG. 6, a columnar magnetic body 25a is built in a coated cylinder 25b made of a resin material such as cylindrical Teflon. It is preferable to seal the body 25a. Reference numeral 25c denotes a mounting hole for the suspension rod 24.
[0018]
As shown in FIGS. 4 and 5, a drive means 27 having an air cylinder structure is provided below the cover 16. The driving means 27 has a cylinder portion 28 formed in the cover 16, a piston 29 is slidably fitted into the cylinder portion 28, and a rod 30 connected to the upper portion of the piston 29 is provided with the driving magnetic material. Connected to the lower end of the body 26, air ports 31 and 32 are provided at the upper and lower positions of the cylinder portion 28, and pipes (not shown) for supplying and discharging compressed air are connected thereto.
[0019]
At the lower end of the suspension rod 24, an opening / closing element 33 for opening and closing the filling port 10a at the lower end of the nozzle 10 is provided. The opening / closing element 33 has a substantially triangular pyramid shape, and when the suspension rod 24 is pulled up, the triangular pyramid-shaped outer peripheral surface 33 a of the opening / closing element 33 is brought into close contact with the inner peripheral edge of the filling port 10 a of the nozzle 10. When closed and the suspension rod 24 is lowered, the gap between the outer peripheral surface 33a of the opening / closing element 33 and the inner peripheral edge of the filling port 10a of the nozzle 10 is opened so that the liquid material flows out.
[0020]
The bottom surface 33 b of the opening / closing element 33 is formed in a concave spherical shape, and the center and the outer peripheral surface of the bottom surface 33 b are communicated with each other through the pores 34.
[0021]
The pump 14 has a function of driving in reverse after a certain amount of liquid is filled, and the opening / closing element 33 comes into close contact with the filling port 10a of the nozzle 10 to stop the outflow of the liquid and sucks it through the pores 34. The liquid material remaining on the bottom surface 33b of the opening / closing element 33 is returned into the nozzle 10 to prevent dripping.
[0022]
FIGS. 7 to 9 show other forms of the drive means 27 of the drive magnetic body 26 and the fixing means of the cover 16. In this embodiment, a general-purpose cylinder 35 is erected on the top of the cover 16. A piston rod 36 is connected to the upper end of the driving magnetic body 26. As a fixing means for the cover 16, general-purpose clasp mechanisms 39 and 39 in which the ear rings 37 and 37 are rotatably attached to both sides of the cover 16 and the hooks 38 and 38 are attached to the nozzle body 8 side are used. When the ear ring 37 is engaged with the hook 38 and the hook 38 is tilted, the hook 38 pulls the ear ring 37 and is tightened. In addition, about this fixing means, an appropriate means can be employ | adopted besides the above-mentioned structure.
[0023]
Next, the operation of the above embodiment will be described.
Before filling, the driving magnetic body 26 is moved to the raised position by the driving means 27, and the driven magnetic body 25 is also attracted to the driving magnetic body 26 and moved to the raised position. Meanwhile, the suspension rod 24 connected to the driven magnetic body 25 is also lifted, and the outer peripheral surface 33a of the opening / closing element 33 at the lower end of the suspension rod 24 is in close contact with the inner peripheral edge of the filling port 10a at the lower end of the nozzle 10. And kept closed.
[0024]
When filling the liquid, an empty container 7 is supplied directly below the nozzle 10, the nozzle body 8 is lowered via the support arm 5, and the filling port 10 a of the nozzle 10 is positioned in the mouth portion 7 a of the container 7. The driving means 27 is driven and the driving magnetic body 26 is lowered, and the driven magnetic body 25 is lowered accordingly.
[0025]
As a result, the suspension rod 24 descends, and the opening / closing element 33 at its lower end is pulled downward from the filling port 10 a of the nozzle 10, and the liquid passes through the nozzle 10 from the liquid passage 9 of the nozzle body 8. It is injected into the container 7 from the filling port 10 a along the outer peripheral surface 33 a of the opening / closing element 33.
[0026]
When a certain amount of liquid material is filled, the drive means 27 is driven in the opposite direction to raise the drive magnetic body 26, and the driven magnetic body 25 also rises and is connected thereto. The suspended suspension rod 24 is pulled up, the opening / closing element 33 at the lower end thereof is raised, and the outer peripheral surface 33a thereof is in close contact with the inner peripheral edge of the filling port 10a of the nozzle 10. At the same time, the nozzle body 8 rises, and the lower end of the nozzle 10 comes out of the mouth 7 a of the container 7. At this time, the pump 14 is driven in reverse to generate a negative pressure in the liquid passage 9 of the nozzle body 8, and the liquid attached to the bottom surface 33 b of the switch 33 by this negative pressure passes through the pores 34 to form a liquid. It is sucked into the flow path 9 to prevent the liquid material from dripping from the periphery of the opening / closing element 33 and soiling the container 7 and its surroundings.
[0027]
When cleaning the liquid passage 9 in the nozzle body 8 and the nozzle 10, the cover 16 fixing means (the lock pin 21 in FIGS. 2 and 3, the hook 38 in FIGS. 7 to 9) is removed to remove the cover 16 from the nozzle. If the magnetic body 26 for driving and the magnetic body 25 for driving are separated from the main body 8, the suspension rod 24 can be extracted from the nozzle main body 8. After the extraction, the nozzle main body 8 and the opening / closing element are removed. Since these are separated from the suspension rod 24 including 33, they can be cleaned separately. In particular, since the liquid material channel 9 is opened straight, complete cleaning can be performed without leaving any residue.
[0028]
After the cleaning is completed, the suspension rod 24 is inserted into the nozzle body 8 together with the driven magnetic body 25, and when the cover 16 is closed, the drive magnetic body 26 and the driven magnetic body 25 are attracted to each other, so that the suspension rod 24 is predetermined. And can be immediately put into a filling state.
[0029]
If the magnetic material is an electromagnet, the suspension rod 24 can be pulled out only by eliminating the magnetic force without necessarily separating the cover 16 from the nozzle body 8. Even in the case of a magnet, the suspension rod 24 can be pulled out without separating the cover 16 from a small filling nozzle. In such a case, the cover 16 may be fixed as a part of the nozzle body 8 with a bolt or the like.
[0030]
【The invention's effect】
As described above, according to the present invention, the suspension rod for supporting the opening / closing element for opening / closing the filling port at the lower end of the nozzle and the driving means for opening / closing the opening / closing element are separated from each other. Since the opening and closing operation of the switch is performed by the follow-up magnetic body following the movement, the suspension rod and the drive means are substantially free of trouble, and the failure caused by wear of the sliding portion of the suspension rod All inconveniences such as generation and wear powder mixed into the liquid can be eliminated.
[0031]
In addition, since the drive means and the suspension rod are not mechanically connected, it is only necessary to pull out the suspension rod when cleaning the nozzle body and the switch. In addition, since both ends of the liquid channel of the nozzle main body are opened, the cleaning performance is good and complete cleaning can be achieved without generating any residue.
[0032]
In addition, according to the present invention , it is possible to reliably prevent dripping after the opening and closing of the opening / closing element, and it is possible to prevent the container and its conveyance path from being soiled with liquid.
[Brief description of the drawings]
FIG. 1 is a side view showing an example of a filling machine using a filling nozzle according to the present invention.
FIG. 2 is an external perspective view showing an embodiment of a filling nozzle according to the present invention.
FIG. 3 is a perspective view showing a half part in section.
FIG. 4 is a partial cross-sectional view of the same.
FIG. 5 is a cross-sectional view showing an example of a driving unit.
FIG. 6 is a cross-sectional view of the driven magnetic body.
FIG. 7 is a side view showing an embodiment using other driving means and cover fixing means.
8 is a front view of FIG. 7. FIG.
9 is a plan view of FIG. 7. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Filling nozzle 6 Motor 7 Container 8 Nozzle main body 9 Liquid body flow path 10 Nozzle 14 Pump (liquid body supply apparatus)
16 Cover 17 Cavity 20 Pin 21 Lock Pin 23 Peripheral Wall 24 Suspension Fence 25 Driven Magnetic Body 26 Driven Magnetic Body 27 Drive Means 33 Opening / Closing Element 34 Pore 39 Clasp Mechanism

Claims (1)

The liquid filling port of the nozzle body can be opened and closed by an opening / closing element at the end of a suspension rod provided in the nozzle body so as to be movable up and down, and the liquid material is discharged from the filling port of the nozzle body by opening the opening / closing element. In the filling nozzle to be discharged, a follower magnetic body is provided in the upper part of the suspension rod inserted into the nozzle body, and the drive magnetic body is installed in a cover provided on the side of the nozzle body so that the drive magnetic body can be moved up and down. And a driving means for moving the driving magnetic body up and down on the cover, wherein at least one of the magnetic bodies is a magnet ,
The opening / closing element has a substantially triangular pyramid shape, its bottom surface is formed in a concave spherical shape, and its outer peripheral surface and the bottom surface are communicated with each other through a fine pore, and is connected to the nozzle body in a liquid state. A liquid filling nozzle, characterized in that the body supply device can be reversely fed .

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