JPH074161Y2 - Liquid quantitative filling device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a liquid quantitative filling device used to fill a container with a liquid such as a fluid food.

2. Description of the Related Art As an apparatus of this type, for example, as disclosed in Japanese Utility Model Laid-Open No. 61-380099, a cylindrical filling nozzle provided with a liquid introduction port between the upper and lower ends and a liquid inside the nozzle. A movable body for generating a negative pressure in the nozzle, which is arranged so as to divide the inside of the nozzle into upper and lower parts at a position above the introduction port, and a fluid pressure that is attached downward to the upper end of the nozzle and the piston rod is connected to the movable body. Equipped with a cylinder,
It is known that the movable body is formed by a piston having an outer surface slidably fitted to the inner surface of the nozzle.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the above device, the filling liquid may enter between the inner surface of the nozzle and the outer surface of the piston. If the filling liquid is like a fresh cream, the filling liquid that has penetrated may be rubbed by the piston and solidified, which is a so-called charring phenomenon.

If the negative pressure generated in the nozzle is too large,
If air enters from the lower end of the nozzle and the negative pressure is too low, the effect of preventing dripping from the lower end of the nozzle is insufficient. The magnitude of the negative pressure generated in the nozzle corresponds to the stroke of the piston, and the stroke of the piston corresponds to the stroke of the fluid pressure cylinder, but the stroke of the piston is relatively small. Therefore, it is not easy to adjust the stroke of the fluid pressure cylinder, which requires a small adjustment of a small stroke.

An object of the present invention is to provide a liquid quantitative filling device that solves the above problems.

Means for Solving the Problems A liquid quantitative filling device according to the present invention comprises a tubular filling nozzle having a liquid inlet between upper and lower ends, and a nozzle inside the nozzle at a position above the liquid inlet. A liquid quantitative filling device including a movable body for generating negative pressure in the nozzle, which is arranged so as to be partitioned into upper and lower parts, and a fluid pressure cylinder which is attached downward to the upper end of the nozzle and has a piston rod connected to the movable body. The movable body is formed of a diaphragm, a step is provided on the inner surface of the nozzle so as to receive the peripheral edge of the diaphragm, and the presser is inserted into the nozzle so as to press the peripheral edge of the diaphragm. Is.

In the liquid quantitative filling device according to the present invention, the movable body is formed by the diaphragm, the step is provided on the inner surface of the nozzle so as to receive the peripheral edge of the diaphragm, and the presser is inserted into the nozzle so as to press the peripheral edge of the diaphragm. Therefore, the peripheral portion of the diaphragm does not move with respect to the inner surface of the nozzle.

Further, the central portion of the diaphragm can be stroked by the same amount as the stroke of the fluid pressure cylinder, but cannot be stroked at the peripheral portion of the diaphragm.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

The liquid fixed amount filling device is provided with check valves 11 and 12 on the upper and lower sides, and a fixed amount cylinder 15 having a piston 14 built in between the upper and lower ends.
And a filling nozzle 16 connected to the lower end of the filling cylinder 13.

An inverted L-shaped bent portion 21 is provided at the upper end of the filling cylinder 13, and its open end is connected to a filling liquid tank (not shown). A piston rod 22 penetrates the top wall of the bent portion 21 and a fluid pressure cylinder 23 is attached downward.
When the piston rod 21 is projected, the piston rod 21 pushes up the upper check valve 11 to open it, and the pushed down check valve 11 pushes down the lower check valve 12 to open it. Keep the upper and lower check valves 11 and 12 open at the same time,
By sending a cleaning liquid or the like to the filling liquid tank instead of the filling liquid, each part of the apparatus is cleaned. Further, an L-shaped discharge pipe portion 24 is provided at the lower end of the filling cylinder 13.

The filling nozzle 16 includes a cylindrical upper member 31 and a lower member 32 which are connected to each other in a straight line. Upper member 31
A liquid introduction port 33 is provided in the middle of the height of, and is connected to the tip opening of the discharge pipe portion 23. A step 34 is provided on the inner peripheral surface of the upper member 31 immediately above the liquid introduction port 33 (see FIG. 2). A peripheral edge of a diaphragm 35 is placed on the step 34, and a diaphragm retainer 36 is placed on the peripheral portion. A vertical rod 37 is arranged so as to slidably pass through the diaphragm retainer 36, and the lower end thereof is connected to the central portion of the upper surface of the diaphragm 35. On the other hand, a fluid pressure cylinder 39 is attached downward to the upper end of the upper member 31 via a bracket 38, and the upper end of a vertical rod 37 is connected to the piston rod 40 thereof via a connecting member 41. At the lower end of the lower member 32, a liquid flow prevention member 42 composed of a plurality of metal nets vertically stacked is attached, and the liquid flow prevention member 42 allows the liquid in the filling nozzle 16 to flow under pressure. However, it prevents runoff due to its own weight.

At the time of filling, the piston rod 40 of the vertical rod actuating fluid pressure cylinder 39 is made to protrude so that the central portion of the diaphragm 35 is recessed. In this way, when the piston 14 of the metering cylinder 15 in the raised position is lowered as shown in the figure, the upper check valve 11 opens and the liquid in the tank flows down the filling cylinder 13 and flows into the metering cylinder 15. To do. When the metering cylinder 15 is filled with the liquid, the piston 14 is raised. Then, the lower check valve 12 opens, the liquid in the metering cylinder 15 flows out, and the liquid in the filling nozzle 16 passes through the liquid flow prevention member 42 and flows out of the filling nozzle 16. Thus, at the same time as or immediately before the completion of the filling of the fixed amount of liquid, the piston rod 40 is retracted to pull up the central portion of the diaphragm 35. Then, the volume inside the filling nozzle 16 increases by the amount of movement of the diaphragm 35, and as a result, the inside of the filling nozzle 16 becomes a negative pressure.

Effect of the Invention According to the present invention, since the peripheral edge of the diaphragm does not move with respect to the inner surface of the nozzle, there is no fear that the filling liquid may cause the charging phenomenon.

In addition, the stroke of the center of the diaphragm is the same as the stroke of the fluid pressure cylinder, but it is not possible to make a stroke at the peripheral edge of the diaphragm, so in order to generate a certain amount of negative pressure, for example, the entire diaphragm The stroke of the fluid pressure cylinder can be increased and the stroke can be easily adjusted as compared with the case where the stroke is stroked.

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an embodiment of the present invention, FIG. 1 is a vertical longitudinal sectional view, and FIG. 2 is a partially enlarged sectional view of FIG. 16 ... Filling nozzle, 33 ... Liquid inlet, 34 ... Stage, 35 ...
… Movable body, 36 …… Presser foot, 39 …… Fluid pressure cylinder, 40 ……
Piston rod.

Claims (1)

[Scope of utility model registration request] 1. A cylindrical filling nozzle 16 having a liquid introducing port 33 between upper and lower ends, and a liquid introducing port 33 in the nozzle 16.
A movable body 35 for generating negative pressure in the nozzle, which is arranged so as to vertically partition the inside of the nozzle 16 at a higher position;
In a liquid constant quantity filling device, which is installed downward at the upper end of 16 and has a fluid pressure cylinder 39 in which a piston rod 40 is connected to a movable body 35, the movable body 35 is formed by a diaphragm, and the peripheral edge of the diaphragm 35. A step 34 is provided on the inner surface of the nozzle 16 so as to receive the portion, and a step 36 is provided to press the peripheral edge of the diaphragm 35.
Is inserted in the nozzle 16 to provide a liquid quantitative filling device.