JPH0253285B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION -Field of Industrial Application- The present invention relates to a filling nozzle for filling containers such as cans with liquid, and particularly to a filling nozzle for filling viscous substances such as liquid thiokolate.

-Prior Art- As is well known, when filling a container such as a can with a liquid such as kerosene, a filling nozzle having a cylindrical nozzle that can be inserted into the mouth of the can or the like is used to perform the filling in fixed quantities. That is, conventional filling nozzles have a built-in valve body that can close off a cylindrical nozzle in the nozzle body, and by opening and closing the valve body, the liquid supplied to the nozzle body is discharged into a container such as a can. .

By the way, when such a filling nozzle is used for a viscous substance such as liquid thiokolate, the viscous substance clinging to the cylindrical nozzle or valve body drips out afterwards due to its high viscosity, staining the surrounding area. There is a risk that the viscous material that has dropped may cause errors in the cylindrical container and its weight. For this reason, conventionally, a drip plate or receiver is placed below the filling nozzle to prevent dripping into the surrounding area or into the filling container, but with these methods, as the work progresses, the dripping prevention device gradually There were cases where the device became dirty and became ineffective, or a viscous substance dripped while changing the position of the drip preventer.

-Object of the Invention- In view of the problems of conventional liquid filling nozzles as described above, an object of the present invention is to obtain a filling nozzle structure that does not drip even when the liquid is highly viscous. .

-Structure of the Invention- In order to achieve this object, the present invention provides a viscous material filling nozzle that includes a nozzle body into which a viscous material is pumped and has a cylindrical nozzle at the bottom.
A valve rod that can be operated in the longitudinal direction is located inside the nozzle body, and a large-diameter stopper that closes the cylindrical nozzle when inserted into the cylindrical nozzle is provided at the tip of the valve rod; A valve body seated on the inner valve seat of the cylindrical nozzle is pushed in the closing direction by a spring and loosely fitted into the middle part of the valve stem, and a vacuum suction hole opening at the tip of the plug body is formed in the center of the plug body, Connecting the vacuum suction hole to a suction chamber between the plug body and the valve body, which is formed between the periphery of the valve stem and the cylindrical nozzle by relative movement of the valve body with respect to the valve stem. This is what we propose.

Embodiments of the invention will now be described in detail with reference to the drawings.

FIG. 1 is a cross-sectional view of a filling nozzle according to the present invention, and the hollow nozzle 1 body has a flange 1a on the side that connects to a viscous material source (not shown), and the viscous material is pumped from this flange 1a. be done. The nozzle body 1 has a cylindrical nozzle 1b at the tip of the lower part formed into a conical cylinder shape, and the viscous material is discharged into the container from the cylindrical nozzle 1b. That is, the base of the cylindrical nozzle 1b shown as a cylindrical nozzle 1b, that is, the conical inner surface, serves as a valve seat 3 on which a valve body 2 capable of closing off the cylindrical nozzle 1b is seated. Further, a valve rod 4 is located in the center of the nozzle body 1 and is operated in the longitudinal direction by a pneumatic cylinder device or the like (not shown). The tip of this valve stem 4 supports a stopper 5 having an outer shape that matches the cylindrical nozzle 1b, and by inserting the stopper 5 into the cylindrical nozzle 1b, the valve body 2 can be completely closed. , cylindrical nozzle 1b
The viscous substance inside can be pushed out. Also,
A vacuum suction hole 6 is bored in the center of the plug body 5, and the other end of the vacuum suction hole 6 is opened at the lower end surface of the plug body 5. Contact room 7 (first illustration).

On the other hand, a valve body 2 seated on the valve seat 3 is supported in the middle part of the valve stem 4 so as to be movable in the length direction, and the valve body 2 is supported by a fixing block 8 fixed to the valve stem 4.
It is pressed in the closing direction by a compression spring 10 interposed between the moving block 9 and the moving block 9.

Since the filling nozzle of the illustrated embodiment has the structure described above, during filling of viscous material,
The valve stem 4 is placed in the position shown in the second figure. When the filling of the viscous substance into the container etc. is almost completed, the valve stem 4 is lowered and the cylindrical nozzle 1b is closed by the stopper 5, and at the same time, the viscous substance remaining in the cylindrical nozzle 1b is discharged to the outside. Extruded. Then, the following valve stem 4
Due to the downward movement of the valve body 2, the valve body 2 comes into contact with the valve seat 3, and the filling nozzle is completely closed. However, when the valve stem 4 descends further, the valve body 2 is stopped at the valve seat 3, so that The volume of the suction chamber 7 formed between the plug body 5 and the valve body 2 gradually expands. As a result, the plug body 5
The viscous material remaining on the bottom surface of the plug is sucked into the suction chamber 7 through the vacuum suction hole 6 by the negative pressure in the suction chamber 7, so the viscous material adhering to the stopper 5 does not drip. .

When opening the filling nozzle, the viscous material in the suction chamber 7 is first pushed out through the vacuum suction hole 6 by the rise of the valve stem 4, and then the valve body 2 Since the suction chamber 7 is opened easily, the viscous substance in the suction chamber 7 does not solidify.

-Effects of the Invention- As is clear from the above description, according to the present invention, the viscous substance attached to the filling nozzle does not drip later and cause an error in the filling amount, or contaminate peripheral equipment. A filling nozzle with a relatively simple structure can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the filling nozzle of the present invention in a closed state, and FIG. 2 is a sectional view corresponding to FIG. 1 of the same filling nozzle in an open state. 1... Nozzle body, 1b... Cylindrical nozzle, 2...
... Valve body, 4 ... Valve stem, 5 ... Plug body, 6 ... Vacuum suction hole, 7 ... Suction chamber, 10 ... Compression spring.

Claims (1)

[Claims] 1. In a viscous material filling nozzle that includes a nozzle body into which a viscous material is pumped and has a cylindrical nozzle at the bottom, a valve rod that is operated in the longitudinal direction is located inside the nozzle body, and the cylindrical A large-diameter stopper that closes the cylindrical nozzle when inserted into the cylindrical nozzle is provided at the tip of the valve stem, and a spring pushes the valve element seated on the inner valve seat of the cylindrical nozzle in the closing direction to close the valve. A vacuum suction hole that is loosely fitted in the middle part of the rod and opens at the tip of the plug body is formed in the center of the plug body, and the relative movement of the valve body with respect to the valve stem causes the valve body to move around the valve stem and the cylindrical nozzle. A filling nozzle for filling a viscous substance, characterized in that the vacuum suction hole is connected to a suction chamber formed between the plug body and the valve body.