JPH0999914A - Filling nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make contact resistance of spacers and peripheral edges of perforated plates high so as to prevent the perforated plates from slipping off from a nozzle body by providing annular non-perforated sections over the whole peripheries of the perforated plates to be arranged in multiple stages at a bottom end opening of a vertical cylindrical nozzle. SOLUTION: At a bottom end opening of a vertical cylindrical nozzle body 21 having an annular upward receiving face 39a and a downward pressing face 25a arranged in a facing manner at a predetermined interval on the inner face of the bottom end opening, a plurality of perforated plates 22 and 23 which prevent flow down of liquid due to its dead load by surface tension are arranged in multiple stages with annular spacers 24. At this time, annular non-perforated sections 22a and 23a which extend over the whole peripheries of the perforated plates 22 and 23 are provided. Thus, the peripheral parts of the perforated plates 22 and 23 are reinforced, contact resistance of the spacers 24 and the peripheral edges of the perforated plates 22 and 23 becomes high, the perforated plates 22 and 23 become deformed so as to deviate from between the receiving face 39a and the pressing face 25a, thereby preventing them from slipping off from the nozzle body 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filling nozzle used in a liquid quantitative filling device for filling a container with a liquid such as a fluid food in a fixed amount.

[0002]

2. Description of the Related Art As a filling nozzle of this type, for example,
As disclosed in Japanese Utility Model Publication No. 4-97010,
A vertical cylindrical nozzle body provided with an annular upward receiving surface and a downward pressing surface facing each other at a predetermined interval on the inner surface of the lower end opening edge, and a peripheral edge portion is interposed between the receiving surface and the pressing surface. The nozzle body is provided with a plurality of perforated plates which are arranged in multiple stages and which prevent the liquid from flowing down due to its own weight due to the surface tension of the liquid in the nozzle body, and an annular spacer interposed between the peripheral portions of the adjacent perforated plates. It is known that the holes of the perforated plate are formed so as to be scattered throughout the perimeter of the perforated plate.

[0003]

In the above filling nozzle,
A hole is also formed in a portion where the spacer and the porous plate are in contact with each other, that is, in the peripheral edge of the porous plate. Therefore, the strength of the peripheral edge of the perforated plate is insufficient and the contact resistance between the spacer and the peripheral edge of the perforated plate is small. It sometimes came off between the surfaces and fell off the nozzle body.
If the perforated plate falls out, not only stable filling cannot be performed, but there is also a risk that the porous plate may enter the container for containing the filling material.

An object of the present invention is to solve the above problems,
An object of the present invention is to provide a filling nozzle in which the porous plate does not fall out of the nozzle body.

[0005]

SUMMARY OF THE INVENTION A filling nozzle according to the present invention comprises a vertical cylindrical nozzle body provided with an annular upward receiving surface and a downward pressing surface facing each other at a predetermined interval on an inner surface of a lower end opening edge portion. , A plurality of perforated plates which are arranged in multiple stages such that a peripheral portion is interposed between the receiving surface and the pressing surface and which prevent the liquid from flowing down due to its own weight due to the surface tension of the liquid in the nozzle body, and the adjacent porous plates. In a filling nozzle provided with an annular spacer interposed between the peripheral portions, the peripheral portion of the perforated plate is provided with an annular non-perforated portion extending over the entire circumference thereof. is there.

In the filling nozzle according to the present invention, since the perforated plate is provided with an annular non-perforated portion extending all around the perimeter of the perforated plate, the non-perforated portion reinforces the perimeter of the perforated plate. The contact resistance between the spacer and the peripheral edge of the porous plate increases. Therefore, there is no concern that the perforated plate will deform and come off between the receiving surface and the pressing surface and fall out of the nozzle body.

Further, it is preferable that the width of the non-hole portion is substantially the same as the width of the spacer. Then, the liquid passage cross-sectional area can be maximized. If the width of the non-hole portion is larger than the width of the spacer, the portion where the spacer is present becomes a recess, and the recess may be clogged with fibrous material mixed in the liquid.

Further, the width of the holeless portion may be substantially the same as the width of the receiving surface and the pressing surface. As a result, the perforated plate can be held without increasing the flow path resistance.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

Referring to FIG. 3, the liquid quantitative filling device is
A vertical filling cylinder 14 arranged above the conveying path of the container C on the conveyor 11 and provided with upper and lower check valves 12 and 13;
At the middle of the height of the filling cylinder 14, the upper and lower check valves 1
2 and 13 are connected via connecting pipe 15 and piston 16
And a filling nozzle 18 connected to the lower end of the filling cylinder 17. The upper end of the filling cylinder 14 is connected to a not-shown filling liquid tank.

Referring to FIGS. 1 and 2, a filling nozzle.
Reference numeral 18 denotes a vertical cylindrical nozzle body 21, two porous plates 22 and 23 of a total of four arranged one by one at the lower end opening of the nozzle body 21, and adjacent ones of these porous plates 22. It is composed of three spacers 24 interposed between and a pressing member 25 arranged on the uppermost porous plate 22.

The nozzle body 21 is composed of an upper cylinder 31 having a circular cross section, a lower cylinder 32 having a quadrangular cross section, and a square nut 33 that removably connects the two cylinders 31, 32.

A large diameter portion 34 is formed in the upper portion of the inner peripheral surface of the upper cylindrical body 31, and the lower portions of the lower check valve 13 and the filling cylinder 14 are inserted therein. A male screw 35 into which a nut 33 is screwed is formed near the lower end of the outer surface of the upper tubular body 31, and a short tubular fitting portion 36 is formed below the male screw 35. On the outer surface of the lower end of the fitting portion 36, a rubber seal ring 45 having an L-shaped cross section, which is brought into contact with the lower inner peripheral surface of the nut 33 and the upper end surface of the pressing member 25, is fitted. At the upper end of the lower tubular body 32, a pair of upper extension portions 37 are formed to face each other, and a fitting ridge 38 is formed to face the facing surfaces of both extension portions 37. An inward flange-shaped receiver 39 is formed at the lower end of the inner peripheral surface of the lower cylindrical body 32. The receiver 39 has an upward receiving surface 39a that receives the outer peripheral edge of the lowest porous plate 23. A fitting groove 40, into which the fitting protrusion 38 is fitted, is formed at the lower edges of the two parallel surfaces of the outer surface of the nut 33.

The two types of perforated plates 22 and 23 are both lower cylinders.
It has a rectangular outer shape that matches the inner peripheral surface of 24. One porous plate 22 is composed of a quadrangular holeless portion 22a extending over the entire circumference of the perforated plate 22 and a grid-like perforated portion 22b which defines the holes of the porous plate 22 inside thereof. One side of the quadrangle formed by the holeless portion 22a and the straight line portion of the lattice formed by the holed portion 22b are orthogonal to each other. The other porous plate 23 is
Like the porous plate 22 on one side, the non-perforated portion 23a and the perforated portion 23a
The other side of the perforated plate 23 has a square side formed by the non-perforated portion 23a and a straight line portion of the lattice formed by the perforated portion 23b intersect at an angle of 45 degrees.

All the spacers 24 are made of stainless steel having the same shape, and are formed in a rectangular ring shape extending along the peripheral edges of the perforated plates 22 and 23.

The holding member 25 is formed in a cubic shape so as to occupy the inside of the lower cylindrical body 32 with almost no space, and has a liquid passage 44 changing from a circular shape to a quadrangular shape from the upper end to the lower end. At the lower end of the pressing member 25, a downward receiving surface 25a that presses the outer peripheral edge of the uppermost porous plate 22 is formed.

FIG. 4 is an enlarged view of the lower opening edge of the filling nozzle 18. Thickness T of two kinds of perforated plates 22 and 23
Is 0.3 mm in each case. The thickness t of the spacer 24 is
It is 1.0 mm. Non-perforated part 22 of two kinds of perforated plates 22, 23
The width W of a and 23a and the width W of the spacer 24 are matched. Further, the width W of both of them is made to coincide with the width W of the receiving surface 39a and the pressing surface 25.

A method of assembling the filling nozzle will be briefly described. If we start from the state shown in FIG.
Two kinds of porous plates 22 and 23 and three spacers in the lower cylindrical body 32
24 and 12 are put alternately, and the pressing member 25 is put thereon. Next, the fitting protrusion 38 of the lower cylinder 32 is fitted into the fitting groove 40 of the nut 33 by relatively sliding the lower cylinder 32 and the nut 33. Next, the nut 33 is screwed into the male screw 35 of the upper cylinder 31. Finally, when the fitting portion 36 of the upper tubular body 31 enters the lower tubular body 32, the nut 33 and the lower tubular body 32 are inserted.
The relative slide of is regulated, and the assembly is completed. The filling nozzle is disassembled by the reverse procedure.

FIG. 5 shows one porous plate 22 in detail, and FIG. 6 shows a part of the other porous plate 23 in detail. The perforated plates 22 and 23 are made of stainless steel, and their holes are formed by an etching process.
At the vertical and horizontal intersections of the lattice formed by b and 23b, the corresponding linear portions directly intersect each other without overlapping.

In FIG. 5, the non-perforated portion of one porous plate 22
The width W of 22a is 1.4 mm. The hole pitch P1 is 1.
27 mm, and the length L1 of one side of the hole is 1.02 mm. The width W1 of the linear portion of the lattice of the perforated portion 22b is 0.25 mm.
This is a porosity equivalent to a 20 mesh wire mesh.
In FIG. 6, the width W of the non-perforated portion 23a of the other porous plate 23
Is also 1.4 mm. Furthermore, P1 = P2, L
1 = L2 and W1 = W2.

The porosity of the perforated plate and the thickness of the spacer are
Other than the above specific examples, it is appropriately changed depending on the viscosity of the liquid. The thickness T of the perforated plate is 0.3 to 1.0 mm. If it is thinner, the strength is insufficient, and if it is thicker, etching becomes difficult. The minimum width W1 of the linear portions of the lattice of the perforated portions 22b and 23b is about 0.1 mm. If it is smaller than this, the strength is insufficient.

The thickness of the spacer is, for example, 1.5 mm or 0.5 mm in addition to the above 1.0 mm. Spacers with different thicknesses are used depending on the type of liquid. For example, for liquids with high viscosity, relatively thick spacers are used to keep the gaps between the perforated plates wide, and for liquids with low viscosity, spacers are kept thin to keep the gaps between the perforated plates narrow.

In the above embodiment, two kinds of perforated plates are used. By doing so, it becomes difficult for the liquid to pass through the perforated plate, and the surface tension can be effectively utilized. However, one kind of perforated plate may be used. Further, the number of perforated plates is not limited to four, and the number is practically provided up to about 1 to 6.

Further, the shape of the holes of the perforated plate may be a circle, a triangle, a pentagon, etc. other than the square shown.

Furthermore, the linear portion that defines the holes of the perforated plate is
As described above, in addition to being orthogonal to each other, they may intersect at an angle, in which case the shape of the hole is a rhombus.

[0026]

According to the present invention, the porous plate can be prevented from falling out of the nozzle body.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a filling nozzle according to the present invention.

FIG. 2 is a vertical longitudinal sectional view of a filling nozzle.

FIG. 3 is a vertical longitudinal sectional view of a filling device including a filling nozzle.

FIG. 4 is a sectional view of a lower end opening edge portion of the filling nozzle.

FIG. 5 is a plan view of a perforated plate of the filling nozzle.

FIG. 6 is a plan view of another type of perforated plate.

[Explanation of symbols]

 21 Nozzle body 22a, 23a Holeless part 22, 23 Perforated plate 24 Spacer 25a Holding surface 39a Receiving surface

Claims (3)

[Claims] 1. An annular upward receiving surface on the inner surface of the lower opening edge portion.
39a and the downward pressing surface 25a are provided so as to face each other with a predetermined interval, and the receiving surface 39
a. A plurality of perforated plates 22, which are arranged in multiple stages so that a peripheral portion is interposed between the pressing surface 25a and the pressing surface 25a, and which prevent the liquid from flowing down by its own weight due to the surface tension of the liquid in the nozzle body 21,
In the filling nozzle provided with 23 and the annular spacer 24 interposed between the peripheral portions of the adjacent perforated plates 22 and 23, an annular spacer extending around the perimeter of the perforated plates 22 and 23 is formed. A filling nozzle characterized in that it is provided with non-perforated portions 22a, 23a. 2. The width W of the non-hole portions 22a, 23a is determined by the spacer.
The filling nozzle according to claim 1, which has a width W substantially equal to 24. 3. The width W of the non-perforated portions 22a, 23a is determined by the receiving surface 39.
The filling nozzle according to claim 1 or 2, which has a width W substantially equal to that of a and the pressing surface 25a.