JPS6244959Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a liquid filling nozzle that is installed in a filling machine that fills a container with a liquid such as juice.

Prior Art and its Problems Conventionally, a wire mesh liquid filling nozzle is known as this type of nozzle. This conventional nozzle has a wire mesh attached to the tip opening of the nozzle.
After liquid filling is completed, the liquid remaining in the nozzle is prevented from dripping due to the surface tension of the wire mesh portion. Conventional wire-mesh liquid filling nozzles like this are used to keep the filling amount constant and accurate when filling liquids with relatively low viscosity, such as milk, which drain well when filling is completed and have good fluidity. , and can be filled at high speed. However, when filling relatively high viscosity liquids that contain substances such as fruit pulp and fibers, the wire mesh acts as resistance and the liquid flows slowly.
It was difficult to drain the liquid and high-speed filling was not possible. Therefore, in the past, the filling machine was operated at a lower filling speed, which caused the problem that the efficiency of the entire filling machine was extremely poor.

In order to solve such problems, the applicant
First, a cylindrical nozzle body, a damper attached to the lower end of the nozzle body so as to be movable in the vertical direction, a spring suspension member arranged and fixed at the upper part of the nozzle body, and a coil suspended from the spring suspension member. For a filling machine, comprising a spring, a connecting member connecting the lower end of the coil spring and the free end of the damper, and a resistor against flowing liquid fixed to the connecting member and positioned below the coil spring. A filling nozzle was proposed (see Japanese Patent Application Laid-Open No. 1689-1989).

However, in future liquid filling nozzles,
Since a damper opening/closing mechanism consisting of a spring hanging member, a coil spring, a connecting member, and a resistor is installed inside the nozzle body, all of these elements act as resistance to the flowing liquid and prevent the flow of highly viscous liquid. The process became slow and high-speed filling could not be performed. Additionally, as mentioned above, the damper opening/closing mechanism is located inside the nozzle body, so it is not visible from the outside, making maintenance and inspection of the nozzle difficult.
There was a problem that there was a risk of trouble occurring during the liquid filling operation.

The purpose of this invention is to be able to fill a specified container at high speed even when the liquid contains substances such as pulp and fibers and has a relatively high viscosity. Maintenance and inspection can be extremely easily performed from the outside, preventing problems during liquid filling work, and the liquid filling nozzle can be easily inserted into the container during filling. It is about providing.

Means for Solving the Problems In order to achieve the above-mentioned purpose, the liquid filling nozzle according to this invention has a structure in which the front and rear edges of the opening of the rectangular cylindrical nozzle body inserted into the container during filling are aligned with the lower end of the nozzle body. The inner surface of the bottom wall of the gate is formed into an arc shape with a radius centered on a point on the left edge of the gate, and the inner surface of the bottom wall of the gate is formed into an arc shape that matches the arc of the front and rear edges. The front and rear rising walls are swingably attached to the front and rear walls of the nozzle body with a pin at the center of the circle, and the lower end of the right side wall of the nozzle body fits the bottom wall of the gate when it is opened almost inside the outer surface of the side wall. A vertically extending vertically extending vertically along at least one of the front and rear walls of the nozzle body 10 and a lifting rod that is raised and lowered by an opening/closing actuator are disposed as a recessed portion, and the lower end of the lifting rod and the rising wall of the gate are connected to a pin. They are connected.

Note that in the above configuration, although the expression "left and right in the drawing" is used as described later, it goes without saying that this may be reversed.

Operation During filling, the main body of the filling nozzle according to this invention is inserted into a container, and the opening/closing actuator is operated to open to raise the lifting rod. Then, the gate connected to the lower end of the nozzle body swings to the recessed part of the nozzle body to open the opening. When filling is completed, the opening/closing actuator is operated to close and the lifting rod is lowered. The gate then swings back to its original position and closes the opening.

The front and rear edges of the opening of the rectangular cylindrical nozzle body are shaped like an arc with a radius centered on a point on the left side edge near the bottom of the nozzle body, and the inner surface of the bottom wall of the gate is shaped like a circle that closes the opening. The gate is formed into an arc shape that matches the arc of the front and rear edges, and the front and rear rising walls of the gate are swingably attached to the front and rear walls of the nozzle body with a pin at the center of the circle, and the lower end of the left side wall of the nozzle body is attached to the front and rear walls of the nozzle body. Since the bottom wall of the gate when opened is formed into a recessed portion that can be accommodated substantially inside the outer surface of the side wall, the gate when opened does not interfere with the container when the nozzle body is inserted into and removed from the container.

An elevating rod that extends vertically along at least one of the front and rear walls of the nozzle body and is raised and lowered by an opening/closing actuator is disposed, and the lower end of the elevating rod and the rising wall of the gate are connected with a pin. The opening/closing mechanism can be seen from the outside of the nozzle body, and there is no problem in putting the nozzle body in and out of the container during filling.

Embodiment An embodiment of this invention will be described below based on the drawings.

In this specification, front, rear, left, and right are based on FIG. 1, and "front" refers to the front side of the sheet of paper in FIG. shall mean.

In the drawing, a filling machine 1 includes a liquid storage tank 2 that stores liquid mixed with substances such as fruit pulp and fibers, such as fruit juice, and a liquid filling cylinder 3 that is connected to the bottom wall of the liquid storage tank 2 in a hanging manner. , a liquid quantitative supply cylinder 4 connected to the central part of the height via an inverted L-shaped connecting pipe 6, and a liquid supply cylinder 4 according to this invention detachably attached to the lower end of the liquid filling cylinder 3. A filling nozzle 5 is provided. Below the liquid filling nozzle 5, a vertically elongated cardboard container 8 held by a container holding member 7 which can be raised and lowered is positioned in an empty state.

An outer convex portion 13 is provided at the upper end of the nozzle body 10, and an inward convex portion 1 is provided at the lower end of an annular fastening fitting 14 screwed onto the lower end of the liquid filling cylinder 3.
5 is provided, and by tightening this metal fitting 14, the inner protrusion 15 and the outer protrusion 13 are engaged, and the nozzle body 10 is attached to the lower end of the liquid filling cylinder 3.

The front and rear edges of the opening 16 of the rectangular cylindrical nozzle body 10 are shaped like an arc drawn with a radius centered on a point on the left side edge near the lower end of the nozzle body 10, and the bottom of the gate 11 closes the opening 16. The inner surface of the wall 11a is formed into an arc shape that matches the arc of the front and rear edges, and the front and rear rising walls 11 of the gate 11
b, 11c are swingably attached to the front and rear walls of the nozzle body 10 with a pin 17 at the center of the circle, and the lower end of the right side wall 10d of the nozzle body 10 is attached to the bottom wall 11a of the gate 11 when opened.
c, 10d is formed into a recessed part 18 that can be accommodated almost inside the outer surface of the nozzle body 10, and the front and rear walls 10 of the nozzle body 10
A lifting rod 21 that extends vertically along at least one of the gates 11a and 10b and is raised and lowered by an opening/closing actuator 27 is arranged, and the lower end of the lifting rod 21 and the upwardly protruding portions 12 of the rising walls 11b and 11c of the gate 11 are connected with pins.

An air cylinder 27, which is an opening/closing actuator, is connected downward with a pin to an upper bracket 40 provided at the upper end of the nozzle body 10, and a pair of lower brackets 41 are provided with an air cylinder 27, which is connected to an air cylinder 27 at the time of retraction and retraction. A pivot shaft 25 is mounted slightly below the piston rod 28 of the cylinder 27 and close to the nozzle body 10. The lower ends of a short first lever 26 extending diagonally upward outward and a second lever 22 extending diagonally upward inward are fixed to the rotation shaft 25 when the piston rod 28 is retracted. , first lever 26
The upper end of the piston rod 28 is connected to the tip of the piston rod 28, and the upper end of the second lever 22 is connected to the upper end of the lifting rod 21 with a pin.

A check valve 30 is provided at the upper end of the liquid filling cylinder 3 near the tank 2 . Check valve 3
0 is equipped with a disc-shaped valve body 31 having a valve stem 32 in an upright shape. A spring receiver 3 is attached to the upper end of the valve stem 32.
3 is installed. Valve seat 3 is installed on the inner wall of cylinder body 3.
4, a valve stem elevation guide member 35 is provided near the upper side thereof. The valve stem 32 is inserted into the hole in the center of the guide member 35, and the upper end of the coil spring 36 fitted onto the valve stem 32 is inserted into the spring receiver 33.
The valve body 31 is always urged upward by the elastic force of the coil spring 36, and is brought into contact with the valve seat 34 from below. ing.

The liquid constant supply cylinder 4 has a cylinder body 37.
, a piston 38 slidably fitted in a cylinder body 37, and a piston rod 39. The piston rod 39 passes through the bottom wall of the cylinder body 37 and projects downward, and is raised and lowered with a constant stroke by means not shown.
As the piston 38 descends together with the piston rod 39, liquid flows from the tank 2 through the liquid filling cylinder 3 and into the metered supply cylinder 4 side.
As the piston 38 rises, it is discharged from the cylinder 4.

In the above, to fill the container 8 with liquid,
First, the container holding member 7 is pushed upward to raise the container 8, and the container 8 is fitted onto the nozzle body 10 of the liquid filling nozzle 5 from below, as shown by the dashed line in FIG. In other words, the nozzle body 10 is inserted into the container 8. and liquid metering supply cylinder 4
When the piston 38 is lowered, the inside of the cylinder 4 becomes negative pressure, so the check valve 30 opens against the elastic force of the coil spring 36, and the liquid filling cylinder 3 and the connecting pipe are removed from the liquid storage tank 2. Liquid is introduced into the supply cylinder 4 via 6. At this time, gate 11
remains closed, so the nozzle body 10
No more liquid will flow out. Next, the piston 38 of the supply cylinder 4 is raised, and the air cylinder 27 is operated to open the gate 11. Then, liquid is injected into the container 8 through the opening 16 at the lower end of the nozzle body 10. As the amount of liquid in the container 8 increases, the container holding member 7 is gradually retracted downward and the container 8 is lowered. piston 3
8 reaches the upper limit, the liquid filling is completed and the gate 11 is closed. By sequentially repeating such actions, the liquid filling operation is performed continuously.

In the above embodiment, the air cylinder 27 is used as the opening/closing device for the gate 11, but the air cylinder 27 is not limited to this. An actuating device or the like may also be used. Further, in the above embodiment, the lifting rods 21 are disposed on both the front and rear walls 10a, 10b of the nozzle body 10, but they may be placed on only one of the front and rear walls 10a, 10b.

Effects of the invention The filling nozzle according to this invention has the above-mentioned configuration, and since there is nothing inside the nozzle body that acts as a resistance to the flowing liquid, it is possible for the liquid to contain substances such as pulp and fibers. Even if the liquid is mixed and has a relatively high viscosity, it can be easily filled at high speed.

The front and rear edges of the opening of the rectangular cylindrical nozzle body are shaped like an arc with a radius centered on a point on the left side edge near the lower end of the nozzle body, and the inner surface of the bottom wall of the gate that closes the opening is It is formed into an arc shape that matches the arc of the front and rear edges, and the front and rear rising walls of each gate are swingably attached to the front and rear walls of the nozzle body with a pin at the center of the circle, and the lower end of the right side wall of the nozzle body is attached to the front and rear walls of the nozzle body. , a recess that allows the bottom wall of the gate to be placed substantially inside the outer surface of the side wall when opened, extends vertically along at least one of the front and rear walls of the nozzle body, and is raised and lowered by an opening/closing actuating device; The gate opening/closing mechanism is visible from the outside of the nozzle body because the rod is arranged and the lower end of the lifting rod is connected with a pin to the rising wall of the gate. Therefore, maintenance and inspection of the nozzle can be extremely easily performed from the outside, and troubles during liquid filling work can be prevented from occurring. Moreover, since the gate opening/closing mechanism is arranged in the above-described manner, there is no problem at all in putting the nozzle body into and out of the container during filling.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; Fig. 1 is a vertical sectional view of a filling machine with a liquid filling nozzle attached, Fig. 2 is an enlarged sectional view of the liquid filling nozzle with parts omitted, and Fig. 3 is a liquid filling nozzle. FIG. 2 is an enlarged side view with parts omitted. 5...Liquid filling nozzle, 8...Container, 10...
Nozzle body, 10a...front wall, 10b...rear wall,
10d...right side wall, 11...gate, 11a...
Bottom wall, 11b...front rising wall, 11c...rear rising wall, 16...opening, 17...pin, 18...
Recess, 21... Lifting rod, 27... Air cylinder (opening/closing operating device).

Claims (1)

[Scope of utility model registration request] The front and rear edges of the opening 16 of the rectangular cylindrical nozzle body 10 inserted into the container 8 during filling are the same as those of the nozzle body 10.
The inner surface of the bottom wall 11a of the gate 11 that closes the opening 16 is formed into an arc shape that matches the arc of the front and rear edges. At the same time, the front and rear rising walls 11b and 11c of the gate 11 are swingably attached to the front and rear walls of the nozzle body 10 with a pin 17 at the center of the circle, and the lower end of the right side wall 10d of the nozzle body 10 is connected to the gate when the gate is opened. The opening/closing actuator is formed into a recessed portion 18 in which the bottom wall 11a of the nozzle body 11 can be accommodated substantially inside the outer surfaces of the side walls 10c and 10d, and extends in the vertical direction along at least one of the front and rear walls 10a and 10b of the nozzle body 10. A lifting rod 21 that is raised and lowered by a lever 27 is disposed, and the lower end of the lifting rod 21 and the rising wall 1 of the gate 11 are arranged.
A liquid filling nozzle in which 1b and 11c are connected by a pin.