JPH021205Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to a nozzle structure connected to a hopper for an automatic powder filling machine.

In the nozzle structure connected to the hopper of this invention, the filling material discharged from the nozzle is discharged and metered simultaneously by the rotation of the screw auger installed inside the nozzle. The metering of a certain amount of the material to be filled is ensured by the opening and closing action of the valve body, and the measured material to be filled from the nozzle is further temporarily stored in a quantitative storage cylinder, and a shut-off valve is provided at the discharge port of the storage cylinder. The roles of the on-off valve body for metering and the shut-off valve for filling are clearly separated. The nozzle structure of this invention is applicable not only to general powder but also to powders whose angle of repose is equal to zero and which are incompressible and turn into a particularly watery fluid when moving during filling. It was developed so that it can also be used for fine-grained powders.

PRIOR TECHNOLOGY The most common powders have compressibility to varying degrees, and the supply/disconnection of the powder to be filled is carried out from within the hopper to a nozzle connected to the hopper. The screw auger's movement/stopping operation is the basic operation of supply/disconnection, and the nozzle is provided with an optimal structure by matching the basic operation with the individual properties of the powder to be filled. For example, the diameter of the discharge port at the tip of the nozzle is narrowed to create a small diameter opening, or a net-like filter called a cross ring is installed, or various shutter configurations are used to meet each purpose. Even if a supply/disconnection means with a shutter configuration is used for the fine powder having the above-mentioned special properties, if the properties change to the above-mentioned water-like fluid, even if there are microscopic voids even when the powder is blocked, leakage will occur. The phenomenon cannot be prevented. In the end, when the conventional shutter structure is used as a means for opening and closing the nozzle opening, a complete closing effect cannot be obtained when the nozzle is closed, and the filling material is discharged to the outside of the filling container, which moves over time due to incomplete metering and filling. This is what happened.

As mentioned above, no matter which type of opening/closing means is provided, the time required for weighing and discharging becomes the filling time.

Purpose of the invention This invention stores the set amount of filling for one time, which is measured and discharged from the hopper, regardless of the length of the discharge time. The filling material is filled into a predetermined container all at once to shorten the time required for filling, and the next filling amount is measured and stored while the container is being transferred.

Means for Solving the Problem Next, an embodiment of this invention will be described with reference to the drawings. A screw auger 3 for stirring and transfer is installed in the nozzle 2 connected to the lower end of the hopper 1. The extension of the axis O of the screw auger 3 is applied to a frame 5 suspended from a collar-shaped support member 4 fixed to the outer periphery of the lower end of the nozzle 2 so as to perform the desired movement/stop operation by applying a predetermined power to the nozzle 2. A cylinder 6 is hung in the same direction as the cylinder 6, and the tip of a rod 7 connected to a piston that moves inside the cylinder 6 is a conical shape having a base diameter larger than the diameter of the opening of the nozzle 2. The opening/closing valve body 8 is mounted so that its tip is aligned with the extension line of the axis O of the screw auger 3.

The above-mentioned on-off valve body 8, a cylinder 6 which is a source body for providing an opening and closing operation to the on-off valve body 8, and an outer cylinder 9 which also accommodates a frame body 5 that suspends the cylinder 6 are connected to the nozzle 2 at the upper end thereof. The installation axis of the cylinder 6 is supported by a supporting piece 10 which is provided so as to surround the outer periphery of a flange-shaped support member 4 provided on the outer periphery of the lower end of the outer cylinder 9, and which is provided inside from the inner periphery of the lower end of the outer cylinder 9 toward the axial center. A cylinder 11 that is different from the cylinder 6 in accordance with
Further, on the outer periphery of the lower end of the outer cylinder 9 is a quantitative storage cylinder 12 having a diameter smaller than the diameter of the outer cylinder 9 and temporarily retaining discharge of a measured amount of the powder to be filled. A nozzle part 13 is provided whose upper end is tightly fixed and whose lower end is tapered.
A discharge port 14 is provided at the lowermost end of the cylinder 11, and a shutoff valve 16 having a diameter larger than the diameter of the discharge port 14 is attached to a piston rod 15 protruding from the lower end of the cylinder 11. Pressurized fluid is supplied to each of the two cylinders 6 and 11 so that the pistons installed therein are actuated at the time of setting.

In the figure, reference numeral 17 is a bracket provided on the outer periphery of the outer cylinder 9, and the hopper 1 is attached to a fixed base frame (not shown).
It is a movement receiving member for vertically moving the outer cylinder 9 and the quantitative storage cylinder 12 as necessary with respect to the nozzle 2 which is fixed therewith. Reference numeral 18 denotes a bellows, which is attached between the upper end of the outer cylinder 9 and the outer periphery of the upper end of the nozzle 2, and is connected to a vacuum conduit 19. Furthermore, a skirt portion 20 is provided on the lower outer periphery of the outer cylinder 9, and a vacuum conduit 19 is connected to a part of the skirt portion. Furthermore, 30 is a container such as a bag to be filled with the material to be filled, and 31 is a powder of the material to be filled.

Function The object to be filled using the device of this invention has special properties as described above, and a certain amount is stored in a certain container in a natural state, and it is maintained in a stationary state. In this case, the air between each particle escapes into the atmosphere, making it easy for the particles to come into close contact with each other, and in such a situation, all the particles solidify. In addition, when an external force is applied to break the solidified state so that air enters between each particle, it becomes a water-like fluid with low viscosity, and becomes a fine powder with an angle of repose equal to zero (e.g. Corn starch) is used when dividing and filling it into sachets of a desired volume, etc. At the time of filling, it is used together with the screw auger 3 to Do not allow the powder to be filled to stand still using an agitator, etc.
In other words, air is mixed between the fine particles to form a fluid in preparation for the filling operation. In this state, the opening at the lower end of the nozzle 2 connected to the hopper 1 is closed by a conical opening/closing valve body 8. It should be kept closed.

Next, talking about the opening/closing operation of the on-off valve body 8, the fluid from the motion source that is expected to generate pressure is intermittently applied to the cylinder 6 that operates the on-off valve body 8 according to the time set for the insertion/extraction operation. In addition, the piston acts in accordance with the operation of the fluid between the cylinders 6, and the opening/closing valve body 8 separates from the opening of the nozzle 2 via the rod 7 connected to the piston and becomes in an open state. At the same time as the on-off valve body 8 starts to open, the screw auger 3 rotates at a rotational speed set to perform a constant discharge action of the object to be filled, and the object to be filled in the hopper 1 is discharged. According to the rotation of the screw auger 3, the liquid is discharged from the opening of the nozzle 2 to the outside of the nozzle 2.

The filling material discharged at this time falls down from above the conical opening/closing valve body 8, but as mentioned above, this opening/closing valve body 8 has a conical shape with the tip facing upward, All of the stuff to be filled falls downward without being loaded and stored on the valve body 8, and also acts as an umbrella to the cylinder 6 that operates the valve body 8 due to the shape of the valve body 8, and the falling objects. There will be no worries whatsoever that will hinder the downward trend. Then, if the screw auger 3 that regulates the flow rate/h of the material to be filled is automatically stopped based on the set values of the rotation speed and rotation operation time, the on-off valve body 8 is activated at the same time as the screw auger 3 is stopped. The nozzle 2 also rises in conjunction with the nozzle 2 to close the opening of the nozzle 2 and complete one discharge operation.

In this way, a certain amount of the material to be filled is discharged from the nozzle 2, and the discharge location is the nozzle 2, the on-off valve body 8, and the outer cylinder housing the cylinder 6 that operates the on-off valve body 8. 9, and the discharge port 14 of the nozzle portion 13 provided at the lower end of the quantitative storage cylinder 12 connected to the lower part of the outer cylinder 9 is connected to the cylinder 6.
A piston rod 1 protrudes from a cylinder 11 supported by a support piece 10 fixed to an outer cylinder 9 below.
Since the hopper 5 is closed by a shutoff valve 16 installed at the lower end thereof, one dose of the material discharged from the hopper 1 is stored in the quantitative storage cylinder 12. This shut-off valve 16 includes at least the conical open-close valve body 8.
When the material to be filled leaves the opening of the nozzle 2 and is discharged into the outer cylinder 9 and the quantitative storage cylinder 12, it is strictly closed. The filled material is always stored once. Then, after the inflow of the fixed amount of the material to be filled into the quantitative storage cylinder 12 is stopped by the closing operation of the opening of the nozzle 2 by the opening/closing valve body 8, the closing valve 16 is opened after a set elapsed time. The valve opens according to the movement of the fluid inserted into and removed from the cylinder 11, and the stored material is stored in the quantitative storage cylinder 1.
2 is discharged to the outside from the discharge port 14 at the lower end. In this way, the time-lapse setting when discharging the material to be filled to the outside is possible because the entire device is related to an automatic filling machine.
1 is intermittently connected to the nozzle part 1 at the lower end of the quantitative storage cylinder 12.
This is done to match the movement of arriving at the position immediately below No. 4. In other words, the purpose is to complete the process of measuring the one-time filling volume of the object to be filled within the transfer time until the filling container 31 reaches the filling position, and the filling process is completed at the same time as the container 31 reaches the regular position. This eliminates all wasted time in the filling process.

This device was developed as a filling device for powders with special properties as described above, and when the nozzle portion 13 is opened with the shutoff valve 16 as described above, the fluidized material to be filled is released. The problem is the drop distance from the discharge port 14 to the container 31 that catches it as if it were a low-viscosity liquid.
When the discharge port 14 of No. 3 is positioned and discharged, the material to be filled reaches the bottom of the container 31 once due to the falling pressure.
Since a large amount flows back upward through the inner part connected to the bottom and overflows outward from the opening of the container, the container 31 is transferred to a position directly below the quantitative storage cylinder 12 and is stopped at the same time as the quantitative storage cylinder 12. The integrally constructed outer cylinder 9 is connected to a bracket 17 attached to the outer cylinder 9.
By the action of an elevating means (not shown) connected to the container 31, the quantitative storage cylinder 12 descends from the opening of the container 31 with the nozzle part 13 at the beginning, and the discharge port 14 at the tip of the nozzle part 13 and the inside of the container 31 are moved downward. When the gap with the bottom reaches a state equal to zero, the shutoff valve 16 is raised to open the discharge port 14 as described above, and the material to be filled temporarily stored in the quantitative storage cylinder 12 is discharged. It is. This discharge situation is due to natural fall, and the quantitative storage cylinder 12
This is to prevent the formation of a gap that would cause a drop between the discharge port 14 of the nozzle part 13 and the surface position of the material to be filled.
In terms of form, it may be more appropriate to say that the object to be filled is gently placed into the container 31. In any case, it is important not to handle the material roughly.

As mentioned above, from the hopper 1 to the quantitative storage cylinder 1
2. The actions of each structure associated with the movement of the filling material from the quantitative storage cylinder 12 to the container 31 are as described above, but the installation operation over time is based on the operation of the container 31, that is, the container supply in the previous process. Transferred from between departments,
The filling operation is set based on the temporary stop between the main filling sections and the intermittent operation of the container 31 over time, which moves to the next process of sealing. The quantitative storage cylinder 12 may be in a downward movement during a moving operation accompanied by measurement of the material to be filled.

Effects This device is constructed as described above, and in the process of filling the container 30 with the material, the material passes through two valve body mounting locations from the hopper 1 to the quantitative storage cylinder 12. do. That is, the first valve body attachment point is the attachment point of the opening/closing valve body 8 that opens and closes the nozzle 2 connected to the hopper 1, and the second valve body is the attachment point of the outer cylinder 9.
This is a shutoff valve 16 that opens and closes the discharge port 14 in the nozzle portion 13 of the fixed quantity storage cylinder 12 that is connected to the meter storage cylinder 12. The former performs metering and discharge amount regulation set based on the transfer capacity and rotation time of the screw auger 3, and the opening/closing valve body 8 is linked to the rotational and non-rotating operations of the screw auger 3. In order to make the metering more accurate, it is a part of the metering section that plays the role of a pass/cut barrier that does not allow the passage of excess material to be filled. is a discharge barrier for filling the container 30 with the material to be filled that has already been weighed and stored by the former. That is, since the time required for weighing and the time required for discharging and filling the container 30 (both in seconds) is longer than the discharging and filling time, the action of discharging while being weighed is treated as the filling operation for the container. If so, it is the metering time, that is, the draining and filling time, and therefore, it is necessary to keep the metering time in the container. Since the production output is determined by the time required to fill these containers, the filling unit time in the automatic filling mechanism influences the production rate. The weighed material to be filled can be filled into the container 30 in a time shorter than the time required for weighing, and the former method is performed when the container to be filled is at the filling operation position. This is done during transport when attempting to reach the destination. Therefore, the container 30
Weighing operations that require longer time than the time required to fill the container 30 can be performed while the container 30 is being transported, so the stop time for the container 30 is the time required for filling. The feature is that the production rate can be significantly increased by the total amount of time saved.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of the whole, and FIG. 2 is a partially enlarged vertical cross-sectional view for explaining the state of filling the container with a substance to be filled. 1...Hopper, 2...Nozzle, 3...Screw auger, 8...Opening/closing valve body, 9...Outer cylinder, 1
0... Support piece, 11... Cylinder, 12... Fixed amount storage cylinder, 13... Nozzle part, 14... Discharge port, 1
5... Piston rod, 16... Closing valve.

Claims (1)

[Scope of utility model registration request] A screw auger 3 is installed inside the nozzle 2 connected to the lower end of the hopper 1 into which the material to be filled is placed, and the screw auger 3 is used for measuring and discharging a set amount by means of rotation and rotation time. The lower end opening is attached to the screw auger 3 with an opening/closing valve body 8 that can open when rotating and close when stopped, in conjunction with a command that automatically moves and stops when setting the screw auger 3. A support piece 10 is provided on the lower inner periphery of an outer cylinder 9 surrounding the outer periphery of the nozzle 2, and a quantitative storage cylinder 12 is connected to the lower end, and the lower part of the quantitative storage cylinder 12 is formed into a tapered shape to form a nozzle. A piston rod 15 moves in and out of a cylinder 11 which is provided with a discharge port 14 at its lower end, and a stop valve 16 having a diameter larger than the diameter of the discharge port 14 is attached to the support piece 10 inside the quantitative storage cylinder 12. A nozzle structure that connects to the hopper for automatic powder filling machines installed at the tip.