JP5700822B2 - Cut nozzle and filling device - Google Patents

Description

  The present invention relates to a filling nozzle (cut nozzle) for filling a container with a liquid to be filled, particularly a solid material, and a filling device including the filling nozzle.

A cut nozzle is known as a technique for preventing the solid matter from dripping from the tip (discharge port) of a filling nozzle when filling a container with a liquid material containing solid matter (for example, salted squid) (Patent Literature). 1). A conventional cut nozzle is composed of a nozzle body portion having a discharge opening at the lower end and a discharge passage having a filling opening on the side surface, and a piston that moves up and down in the discharge passage. When passing through the entrance opening, the solid matter is cut between the lower edge periphery of the piston and the periphery of the intake opening to prevent the solid matter from drooping.
However, in the conventional cut nozzle, the solid material contained in the liquid material cannot be reliably cut at the location of the intake opening, and as a result, a part of the solid material is separated from the outer peripheral wall of the piston and the inner peripheral wall of the discharge passage. It was not possible to reliably prevent them from being caught between the nozzles and hanging from the tip of the cut nozzle (see paragraph 0003 of Patent Document 1).

JP 2000-264308 A

  The present invention improves the conventional cutting nozzle, and more reliably cuts the solid matter contained in the liquid material at the location of the intake opening, thereby preventing the solid matter from sagging from the tip of the cut nozzle. The purpose is to do.

The cut nozzle according to the present invention includes a nozzle body portion having a discharge opening at a lower end and a discharge passage having a filling intake opening on a side surface, and a piston that moves up and down in the discharge passage. A conventional cutting nozzle that cuts the filling material through the lower end periphery of the intake opening is provided with a rotary valve installed in the filling material passage that communicates with the intake opening. The solid matter caught in the intake opening is cut by a rotor.
As a specific configuration, the rotary valve has a rotor that reciprocally rotates between a communication position and a blocking position to communicate / block the supply path, and the rotor has a cylindrical and horizontal axis, and the axis Is formed, the outer radius (1/2 of the outer diameter) is larger than the interval from the axis to the discharge passage, and a recess is formed between both openings of the flow path on the outer peripheral surface. . As the rotor rotates from the communication position to the blocking position, the opening periphery of the rotor flow path passes through the intake opening and cuts the filling. When the rotor reaches the blocking position, the recess closes the intake opening, and the outer peripheral surface of the rotor is retracted out of the lifting path of the piston.

Incidentally, the fact that the outer radius of the rotor is larger than the distance from the axis to the discharge passage means that the outer peripheral surface of the rotor (the outer peripheral surface where the concave portion is not formed) protrudes from the intake opening into the discharge passage. means. On the other hand, in the blocking position, the recess closes facing the intake opening, so that the outer peripheral surface of the rotor moves backward by the depth of the recess. By setting the depth of the recess to a predetermined value (difference between the outer radius of the rotor and the interval from the axis to the discharge passage) or more, the outer peripheral surface (recess) of the rotor is retracted out of the lift path of the piston. Can do.
When the rotor rotates from the communication position toward the shut-off position, it is desirable that the outer peripheral surface on the nozzle body side rotate downward.

  The filling device according to the present invention includes the cut nozzle, a tank for storing the filling, a metering pump for measuring the filling, and a three-port rotary valve disposed on the downstream side of the tank. The metering pump has a cylindrical cylinder and a metering piston that is disposed in the cylinder and reciprocates a predetermined distance within the cylinder. The three-port rotary valve includes a housing in which a channel opening in three directions is formed, and a rotor in which a channel opening in three directions is formed and reciprocally rotates between a first position and a second position in the housing. And each flow path of the housing includes a tank side flow path connected to the tank, a metering pump side flow path connected to the metering pump, and a cut nozzle side flow path connected to the cut nozzle. In the first position, the rotor communicates the tank-side flow path and the metering pump-side flow path of the housing, and cuts off the cut nozzle-side flow path, and in the second position, the rotor is connected to the metering pump-side flow path and the cut nozzle of the housing. The side channel is connected and the tank side channel is shut off.

In the cut nozzle according to the present invention, the solid matter caught in the intake opening is first cut by rotation of the rotor of the rotary valve (first cutting step), and then cut by sliding (lowering) of the piston (second step). Cutting process). In the same intake opening, by cutting in two stages with different blades (periphery of the lower end of the piston and the peripheral edge of the flow path of the rotor), the solid matter caught in the intake opening can be cut compared to the conventional one. Can be performed reliably and stably.
As a result, in the cut nozzle according to the present invention, it is possible to prevent the solid matter from dripping from the tip of the nozzle and contaminating the bag mouth of the bag disposed therebelow as in the conventional cut nozzle.
The cut nozzle and the filling device according to the present invention are particularly suitably used for filling a liquid material containing a solid material, but can also be used for filling a liquid material containing no solid material.

It is sectional drawing (initial state) of the filling apparatus which concerns on this invention. It is sectional drawing (measuring process) of the filling apparatus which concerns on this invention. It is sectional drawing (filling preparation process) of the filling apparatus which concerns on this invention. It is sectional drawing (filling process) of the filling apparatus which concerns on this invention. It is sectional drawing (1st cutting process) of the filling apparatus which concerns on this invention. It is sectional drawing (2nd cutting process) of the filling apparatus which concerns on this invention. It is the plane sectional view (a) and side surface sectional view (b) of the cut nozzle in a filling process. They are a plane sectional view (a) of a cut nozzle in the 1st cutting process, a side sectional view (b), and an expanded side sectional view (c) explaining cutting of a solid object by a rotor. It is side surface sectional drawing (a) of the cut nozzle in a 2nd cutting process, and the expanded side surface sectional view (b) explaining the cutting of the solid substance by a piston. It is a perspective view of the rotor of the rotary valve of a cut nozzle.

Hereinafter, the filling device and the cut nozzle according to the present invention will be specifically described with reference to FIGS.
As shown in FIG. 1, the filling device according to the present invention includes a cut nozzle 1, a tank 2, a metering pump 3, and a 3-port rotary valve 4 as main components.
As shown in an enlarged view in FIGS. 7 to 9, the cut nozzle 1 includes a nozzle body 5 and a piston 6 that is connected to a drive source (not shown) and moves up and down in the vertical direction. The nozzle body 5 has a discharge passage 7 in the vertical direction, and the piston 6 slides up and down in the discharge passage 7. The discharge passage 7 has a discharge opening 8 at the lower end, and an intake opening 9 for an object to be filled is formed on the side surface.

As part of the elements constituting the cut nozzle 1, a two-port rotary valve 12 is installed in a supply path 11 that communicates with the intake opening 9. The rotary valve 12 includes a housing 13 and a rotor 14 installed in the bore of the housing 13. The housing 13 is integrated with the nozzle body 5, and a part of the intake opening 9 and the supply path 11 is a flow path (port).
The rotor 14 has a cylindrical and horizontal axis line (line that becomes the center of rotation) X, is connected to a drive source (not shown), and is connected to a communication position (position shown in FIG. 7) and a cutoff position (FIG. 9) about the axis line X. Between the positions shown in FIG. 2), the supply path 11 is communicated and blocked.

As clearly shown in FIG. 10, the rotor 14 is formed with a flow path 15 orthogonal to the axis X. The opening peripheries 16 a and 17 a of the two openings 16 and 17 (particularly the opening 16) of the flow path 15 have a contour that substantially coincides with the intake opening 9. When the rotor 14 comes to the communication position, the opening 16 of the flow path 15 comes to a position facing the intake opening 9.
A recess 18 is formed on the outer peripheral surface of the rotor 14 at an intermediate position between the openings 16 and 17. This position is a position that faces the intake opening 9 when the rotor 14 reaches the blocking position (position shown in FIG. 9). The recess 18 is formed as a groove whose cross section is curved in an arc shape, and is formed in a direction perpendicular to the axis X (the same direction as the flow path 15). The cross-sectional shape when the concave portion 18 is viewed in the above direction substantially matches the cross-sectional shape of the inner peripheral surface of the discharge passage 7.

The outer radius R (1/2 of the outer diameter) of the rotor 14 is set to be larger than the distance D from the axis X to the discharge passage 7 (R> D). Therefore, the outer peripheral surface of the rotor 14 protrudes from the intake opening 9 into the discharge passage 7 by a maximum distance (RD) while rotating between the communication position and the blocking position.
On the other hand, since the opening 16 faces the intake opening 9 at the communication position (position shown in FIG. 7), the outer peripheral surface of the rotor 14 does not protrude into the discharge passage 7 from the intake opening 9.
In the blocking position (the position shown in FIG. 9), as described above, the recess 18 comes to a position facing the intake opening 9 and closes the intake opening 9. Retreats from the normal outer peripheral surface by the depth of the recess 18. By making the cross-sectional shape of the concave portion 18 substantially coincide with the cross-sectional shape of the inner peripheral surface of the discharge passage 7 and setting the depth of the concave portion to be equal to or greater than the distance (R−D), The outer peripheral surface (recessed portion 18) is retracted out of the lifting path of the piston 6, and interference between the lifting piston 6 and the rotor 14 can be prevented.

The tank 2 is a tank for storing an object to be filled (a liquid material including a solid material) 19.
The metering pump 3 has a cylindrical cylinder 21, a metering piston 22 disposed in the cylinder 21, and a piston rod 23. The piston rod 23 is connected to a drive source (not shown) and moves up and down a predetermined distance. Accordingly, while the measuring piston 22 slides in the cylinder 21, the measuring piston 22 moves between the backward end position and the forward end position, sucks the filling material 19 into the cylinder 21, and measures the amount of filling once. Or, discharge one filling amount.
The rotary valve 4 includes a housing 24 and a rotor 25 installed in a bore of the housing 24. A flow path (port) that opens in three directions is formed in the housing 24. The rotor 25 is cylindrical and has a flow path 27 that opens in three directions. The rotor 25 is connected to a drive source (not shown), and within the housing 24, a first position (position shown in FIG. 1) and a second position (shown in FIG. 3). Reciprocally rotate between positions).

   The flow path of the housing 24 includes a tank side flow path 26 a connected to the tank 2, a metering pump side flow path 26 b connected to the metering pump 3, and a cut nozzle connected to the cut nozzle 1 via the piping member 28. It consists of the side flow path 26c. In the first position, the rotor 25 communicates the tank side flow path 26a and the metering pump side flow path 26b of the housing 24 via the flow path 27 of the rotor 25 and shuts off the cut nozzle side flow path 26c. In the second position, the rotor 25 communicates the metering pump side flow path 26b and the cut nozzle side flow path 26c of the housing 24 and blocks the tank side flow path 26a.

Then, an example of the operation | movement of each site | part of the said filling apparatus is demonstrated in order of a process.
(Initial state / Figure 1)
The piston 22 of the metering pump 3 is raised and is in the forward end position. The rotary valve 4 is in the first position, and the tank side flow path 26a and the metering pump side flow path 26b communicate with each other. The piston 6 of the cut nozzle 1 is in the lowered position, and the rotor 14 of the rotary valve 12 is in the blocking position.

(Measuring process / Figure 2)
The piston 22 of the metering pump 3 descends and moves to the retracted end position, and the filling material 19 in the tank 2 is sucked into the metering cylinder 21.
(Filling preparation process / Fig. 3)
The rotor 25 of the rotary valve 4 rotates to the second position, and the metering pump side flow path 26b and the cut nozzle side flow path 26c of the housing 24 are communicated. In the cut nozzle 1, the piston 6 moves to the rising end position (the lower end of the piston 6 is located above the intake opening 9), and then the rotor 14 of the rotary valve 12 rotates from the blocking position to the communication position, The intake opening 9 is communicated with the supply path 11.

(Filling process / Figs. 4 and 7)
The piston 22 of the metering pump 3 rises and moves toward the forward end position, and pushes out the filling material 19 from the cylinder 21. The extruded filling material 19 enters the discharge passage 7 through the rotary valve 12 and the intake opening 9 of the cut nozzle 1, is discharged from the discharge opening 8, and is filled in a container (not shown) installed below.

(First cutting step / FIGS. 5 and 8)
When the piston 22 of the metering pump 3 reaches the forward end position, the rotor 14 of the rotary valve 12 rotates toward the blocking position. At that time, the opening peripheral edge 16a of the opening 16 of the rotor 14 slides along the back surface of the intake opening 9 (the outer surface of the discharge passage 7) as shown in FIG. The solid matter 19a caught in the intake opening 9 between the peripheral edge 9a of the opening 9 (the solid matter existing in the discharge passage 7 through the intake opening 9 from the flow path 15 of the rotor 14) Is cut from the back side of the intake opening 9. That is, in this first cutting step, the rotor 14 of the rotary valve 12 itself acts as a cutting blade that faces the opening peripheral edge 9 a of the intake opening 9. While the rotor 14 rotates from the communication position toward the blocking position, the outer peripheral surface of the rotor 14 projects into the discharge passage 7 from the intake opening 9 as shown in FIG. When the rotor 14 of the rotary valve 12 reaches the shut-off position, the recess 18 comes to a position facing the intake opening 9.

(Second cutting process / Figs. 6 and 9)
When the rotor 14 reaches the blocking position, the outer peripheral surface (recessed portion 18) of the rotor 14 does not protrude into the discharge passage 7 from the intake opening 9. In this state, the piston 6 is allowed to move in the discharge passage 7 (moving from the ascending end position toward the descending end position). In the process of moving the piston 6 downward, the lower peripheral edge 6a of the piston 6 slides along the inner surface of the intake opening 9 (the surface inside the discharge passage 7), and between the opening peripheral edge 9a of the intake opening 9 The solid material 19 a caught in the intake opening 9 is cut from the inner surface side of the intake opening 9. That is, in this second cutting step, the lower end peripheral edge 6 a of the piston 6 acts as a cutting blade facing the opening peripheral edge 9 a of the intake opening 9 as in the conventional cutting nozzle. When the piston 6 reaches the lower end position, all of the filling material 19 remaining in the discharge passage 7 is filled in the container.
At the same time as the piston 6 starts moving downward, the rotor 25 of the rotary valve 4 returns to the first position and returns to the initial state shown in FIG.

  In addition, in the said cut nozzle 1, the structure described in patent document 1 is employable suitably. Specifically, (1) the piston is hollow and air holes are formed in the lower end surface or the lower end side surface, and the filler adhering to the piston is blown into the container. (3) The clearance between the outer peripheral wall of the piston and the inner peripheral wall of the discharge passage 7 is small at the lower end and relatively large near the upper portion of the lower end. (4) Above (1 ) To (3) may be combined.

DESCRIPTION OF SYMBOLS 1 Cut nozzle 2 Tank 3 Metering pump 4 3 port rotary valve 5 Nozzle body part 6 Piston 7 Discharge passage 9 Intake opening 11 Supply passage 12 Rotary valve 14 Rotor 15 Rotor flow path 16, 17 Rotor flow path opening 18 Recess

Claims (3)

A nozzle body having a discharge opening at the lower end and having a discharge passage having a filling opening on the side surface, and a piston that moves up and down in the discharge passage. In the cut nozzle that cuts the filling material through the opening, a rotary valve is installed in the filling material supply path that communicates with the intake opening, and the rotary valve reciprocates between the communication position and the shut-off position. And a rotor that communicates and blocks the supply path, the rotor has a cylindrical and horizontal axis, a flow path that is orthogonal to the axis is formed, and an outer radius is a distance from the axis to the discharge passage A recess is formed between both openings of the flow path on the outer peripheral surface that is larger, and as the rotor rotates from the communication position to the blocking position, the opening periphery of the flow path of the rotor is the intake opening. Going through Cut the filling, closing the inlet opening is the recess in the blocking position, cutting nozzle, characterized in that the outer peripheral surface of the rotor at this time is retracted from the lifting path of the piston. 2. The cut nozzle according to claim 1, wherein when the rotor rotates from the communication position toward the blocking position, an outer peripheral surface of the nozzle body rotates downward. A metering pump comprising the cut nozzle according to claim 1, a tank for storing an object to be filled, a metering pump for metering an object to be filled, and a three-port rotary valve arranged on the downstream side of the tank. The pump has a cylindrical cylinder and a measuring piston which is disposed in the cylinder and slides back and forth within the cylinder for a predetermined distance. The three-port rotary valve has a flow path which opens in three directions. A housing and a rotor formed in three directions and having a rotor that reciprocally rotates between a first position and a second position in the housing; each passage of the housing is connected to the tank side A flow path, a metering pump side flow path connected to the metering pump, and a cut nozzle side flow path connected to the cut nozzle. The tank-side flow path and the metering pump-side flow path of the casing, and the cut nozzle-side flow path is shut off, and the metering pump-side flow path and the cut nozzle-side flow path of the housing are communicated with each other in the second position, And the filling apparatus characterized by interrupting | blocking a tank side flow path.

Images