JPS6193915A - Hopper type fixed quantity supplying device - Google Patents

Abstract

PURPOSE:To introduce a fixed quantity of raw materials continuously into a quantitative table and to make the fixed quantity accurate by detecting a raw material level in the quantitative table, taking out a necessary signal and controlling an adjusting device based on this signal. CONSTITUTION:A main gate 10 of the adjusting device is for adjusting the opening of a raw material supply port 6 and adjusting the supply quantity of the raw materials from a hopper 1 into the quantitative table 2. The main gate 10 is provided by fixing a supporting plate 25 with a bolt 27 so that a curved plate 23 covers the upper part of the raw material supply port 6. Then, the position to fix the main gate 10 is changed vertically by adjusting the bolt 27 to adjust the opening of the raw material supply port 6 practically. Then, the raw material level in the quantitative level is detected and the necessary signal is taken out and the fixed quantity of raw materials can be supplied continuously into the quantitative table by controlling the adjusting device based on this signal by which the fixed quantity can be made accurately.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a hopper-type fixed-quantity feeding device that measures and discharges raw materials by providing a volumetric metering groove at the lower end of the hopper.

(Prior Art) Continuous metering and discharging of powdered raw materials, granular raw materials, etc. with poor fluidity is an area in which great technical difficulties still remain. FIGS. 3 and 4 are longitudinal sectional views showing an example of a hopper-type metering device conventionally used for measuring and discharging these raw materials.

In this apparatus, the raw material is supplied from a hopper 40 into a metering table 42 by the heavy pressure of the raw material. The raw material supplied into the metering table 42 is introduced into a plurality of metering holes 43 provided in the metering table 42 by the rotation of the table 42 and the action of the guide 44 .

The raw materials introduced into the metering hole 43 are each slit at the upper end of the metering hole 43 by the guide 44, and in this state are extracted from the metering hole 43 and supplied in a fixed amount. In the above-mentioned apparatus, introducing a fixed amount of the raw material into the metering hole 43 is the basis for metering.

However, in the above equipment, changes in the fluidity of the raw material,
Also, due to changes in the pressure of the raw material depending on the capacity of the hopper 40, the amount of raw material supplied from the hopper 40 into the fixed table 42 becomes uneven, and as a result, the raw material may not be introduced into the metering hole 43. , or the amount introduced is not constant, etc., which poses a major problem in supplying the raw material quantitatively.

(Problems to be Solved by the Invention) The present invention attempts to eliminate the drawbacks of the conventional hopper-type metering device as described above. That is, an object of the present invention is to provide a hopper-type quantitative feeding device that can accurately measure raw materials and realize quantitative feeding of raw materials extremely accurately, although the main mechanism is extremely simple. It is in.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present inventors conducted research on this type of quantitative device, and as a result, they came to the following knowledge. That is, in the above-mentioned metering device shown in FIG. It has become possible to introduce a large amount of raw material, and it has been found that it is possible to supply a fixed amount of raw material with great accuracy. Further, as a result of further research, the inventors discovered that when controlling the raw material level in the quantitative table as described above, the raw material level in the quantitative table is continuously detected using an appropriate detection device. Based on the value
It has been found that by controlling a regulating device for adjusting the feed rate of the feedstock fed into the metering table from the hopper, the feedstock level can be controlled very accurately.

The present invention has been made based on the above findings, and its gist consists of (1) a rotatably provided quantitative table having one or more quantitative holes; (2) supply of raw materials into the quantitative table; (3) an adjustment device controlled by the detection device described below to adjust the amount of raw material supplied from the hopper into the quantitative table; (4) a hopper for controlling the raw material supplied to the quantitative table; (5) a detection device for detecting the level of the raw material in the quantitative table, extracting a necessary signal, and controlling the adjustment device based on the signal; This is a hopper-type constant supply device.

The raw materials targeted by the quantitative feeding device of the present invention include various granular, powdery, and highly viscous raw materials such as foods, pharmaceuticals, pigments, and plastics for molding and processing.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The hopper-type fixed cliff supply device of the present invention will be described below based on the drawings.

FIG. 1 and FIG. 2 are a longitudinal sectional view and a plan view showing one embodiment of the quantitative feeding device of the present invention. This device is composed of a hopper 1, an adjustment device 3, an orientation table 2, an introduction device 4, and a detection device 5.

The hopper 1 is for supplying raw materials into a quantitative table 2, which will be described later. Here, the hopper 1 is, for example, in the shape of an upwardly expanding funnel, and has raw material supply ports 6 and 6' formed by cutting out a portion of the periphery of the lower end. The above-mentioned hopper 1 is fixedly provided above the quantitative table 2, with the peripheral edge of the lower end being close to the disk 7 of the quantitative table 2. The shape of the hopper 1 is not particularly limited as long as it can supply the raw material into the metering table 2, and in addition to the one shown in the figure, a right cylindrical shape, a downwardly expanding inverted conical shape, etc. can also be used.

The adjustment device 3 is used to adjust the amount of raw material supplied from the hopper 1 into the quantitative table 2, and is controlled by a detection device 5, which will be described later.

The adjustment device 3 includes, for example, the main gate 10 and the bolt 27, as well as the auxiliary gate 11 and the air cylinder 12. The main gate 10 is for adjusting the opening degree of the raw material supply port 6 and the amount of raw material supplied from the hopper 1 into the quantitative table 2 . The main gate 10 has a curved plate 23 that can be installed over the raw material supply port 6 of the hopper 1.
and a support plate 25. The main gate 10 is provided by fixing a support plate 25 with bolts 27 so that the curved plate 23 covers the upper part of the raw material supply port 6 .

Then, by adjusting the bolt 27, the main goo 3
The opening degree of the raw material supply port 6 is substantially adjusted by changing the fixed position of the raw material supply port 6 up and down. In actual operation of the equipment,
The opening degree of the raw material supply port 6 is adjusted so that the raw material can be supplied to such an extent that the raw material level in the quantitative table 2 gradually decreases.

The auxiliary gate 11 adjusts the opening degree of the raw material supply port 6' by the action of a detector M5 to be described later, and in addition to the action of the main gate 10, it controls the amount of raw material supplied from the hopper 1 to the stationary table 2 more precisely. It is for adjusting to. The auxiliary gate 11 has a curved plate 24 and a support plate 26 that can be placed over the raw material supply port 6'. The auxiliary gate 11 is
A support plate 26 is connected to the air cylinder 12 and installed so that the curved plate 24 covers the upper part of the raw material supply port 6' of the hopper 1. The auxiliary gate 11 is connected to the cylinder 1
2, the support plate 26 is moved up and down by sliding up and down along the guide rail 13, thereby substantially adjusting the opening degree of the raw material supply port 6'. It is also possible to eliminate the main gate 10 and adjust the amount of raw material supplied from the hopper 1 to the quantitative table 2 using only the auxiliary gate 11. Also, instead of the air cylinder 12,
It is also possible to use thread noids, etc. In addition, adjustment i!
The station 3 receives an operation signal from an adjustment device 29, which will be described later.
Any device may be used as long as it is possible to adjust the amount of raw material supplied from the hopper 1 into the quantitative table 2.

The quantitative table 2 has a guide 8 provided around the outer periphery of a disk 7 to prevent the raw material from seeping out.

The disk 7 is provided with an appropriate number of quantitative holes 9 arranged at equal intervals on the circumference near the outer periphery.

The metering hole 9 accommodates a certain amount of the raw material supplied into the metering table 2, and the semiconductor device 4, which will be described later, measures the raw material by cutting the raw material at the upper end into squares. . The shape of the metering hole 9 is not particularly limited, and in addition to the cylindrical shape shown in the figure, a truncated conical shape designed so that the diameter on the bottom surface is slightly larger than the diameter on the top surface can be used. Further, the disk 7 is provided with a shaft attachment portion 15 that fixes the rotating shaft 14 at the center.

The quantitative table 2 having the above-mentioned structure is attached to the rotating shaft 14 at the shaft mounting part 15, and the above-mentioned rotating shaft 14
is rotated in the direction of the arrow a by being driven by an appropriate means. In this case, the rotational speed of the quantitative table 2 can be increased or decreased by changing the rotational speed of the shaft 14 by appropriate means. By increasing the rotational speed of the stationary table 2, the number of times the raw material is counted can be increased. For example, as shown in the figure, the rotating shaft 14 is extended to the inside of the hopper 1 so that the rotating shaft 14 is located at the center of the hopper 1, and the rotating shaft 14 is provided with a stirring shaft close to the inner periphery of the hopper 1. Wings 16 can also be provided. In the above case, during the operation of the device, the stirring blade 1 is
6 rotates with the rotation of the rotating shaft 14, the raw materials are sufficiently mixed within the hopper 1, and the raw materials are more smoothly supplied from the hopper 1 to the metering table 2.

The introduction device 4 is used to introduce the raw material supplied from the hopper 1 to the quantitative table 2 into the quantitative hole 9 and to cut the raw material into squares at the upper end of the quantitative hole 9. The introduction device 4 includes a guide 17 having a shape that allows the raw material supplied to the center of the quantitative table 2 to be moved toward the periphery, for example.
etc.

The guide 17 performs the above-described function during operation of the apparatus, and is fixedly provided above the quantitative table 2 with its lower end close to the upper end of the quantitative hole 9 .

The detection device 5 detects the raw material level (height of the raw material) in the quantitative table 2 and extracts the necessary signal.
This is for controlling the above-mentioned adjustment device 3 based on the signal. Here, the detection device 5 includes the level detection lever 1
8, detector 19, transmission device 28 and controller 29
Consisting of The level detection lever 18 has a detection surface 21 that can come into contact with the upper surface of the raw material in the quantitative table 2, and is provided so as to slide in the range indicated by the arrow W using the shaft 20 as a fulcrum depending on the raw material level. The level detection lever 18 has a detected part 32 at the other end different from the detection surface 21 that can be detected by the detection head 31 of the detector 19 described below, for example, a metal part. A device equipped with a magnetic generator can be used.

The detector 19 is connected to the level detection lever 18 by the detection head 31.
This is for detecting the movement of the detected part 32 during the movement and extracting necessary signals. For example, when the detector 19 is within a certain distance range from the detection head 31, the detector 19 is turned on.
”, and when the detected part 32 exceeds the above range and moves away from the detection head 31, “'OF F” occurs.
These 0N10FF states are converted into electrical signals and transmitted to the transmission device 28. The detector 19 and the level detection lever 18 need to be installed in a positional relationship that allows the level of the raw material in the quantitative table 2 to be clearly determined. It is provided in close proximity to the section 32 in a non-contact manner. As the detector 19, for example, a photoelectric switch, a magnetic switch, etc. can be used. Further, as the detector 19, a type of magnescale, image sensor, etc., which strictly detects the movement of the detected part 32, converts the detected value into an electrical signal, and transmits the signal to the transmission device 28 described below, is used. It can also be used.

The transmission device 28 is for converting the signal sent from the detector 19 into another signal suitable for transmission that can be easily analyzed and compared by the controller 29 described below. As the above-mentioned transmission device 28, a converter or the like using a semiconductor is usually used.

The controller 29 is for analyzing and comparing the signals converted by the transmission device 28 and sending operation signals to the controller 3 described above. An operation signal from the controller 29 operates the air cylinder 12 in the adjustment device 3, thereby moving the auxiliary gate 11 up and down.

Note that the controller 29 is asked whether the signal sent from the transmission device 28 is for a high or low raw material level in the quantitative table 2 (whether the detector 19 is in 0N10FF state). A target value that can be clearly determined is stored in advance. Therefore, the signal sent to the controller 29 is compared with this target value to determine whether the signal is for a high or low raw material level, and if it is determined that the signal is for a high raw material level, An operation signal to operate the air cylinder 12 and lower the auxiliary gate 11 is sent to the adjustment device 3. On the other hand, if it is determined that the raw material level is low, an operation signal to operate the air cylinder 12 and raise the auxiliary gate 11 is sent to the adjustment device 3. The controller 29, for example, determines the raw material level in the quantitative table 2 based on the signal sent from the transmission device 28, and operates the air cylinder 12 based on this. It is also possible to use a device that can send an operation signal to the adjustment device 3 to raise or lower the auxiliary gate 11 to a predetermined height.

The above is an example of the detection device 5, and any detection device 5 may be used as long as it is capable of detecting the raw material level in the quantitative table 2 and controlling the adjustment device 3 based on this.

The hopper-type quantitative filling device of the present invention has the above-mentioned configuration.Next, a case will be described in which the above-described device is actually operated to perform quantitative supply of raw materials.

When the apparatus is operated, the rotary shaft 14 is first rotated in the direction of the arrow a by an appropriate means, and as the rotary shaft 14 is rotated, the quantitative table 2 and the stirring blades 16 in the hopper 1 are rotated. The hopper 1, the adjustment device 3, the introduction device 4 and the detection device 5 are fixed.

The raw material is supplied from the hopper 1 to the center of the fixed-size table 2, and as the fixed-size table 2 is rotated as described above, the raw material is moved to the peripheral portion of the quantitative table 2 by the rotational force and contact with the guide 17. , the table 2
It is accommodated in the metering hole 9 provided in the. The raw material contained in the metering hole 9 is rotated by the fixed stone table 2.
When the metering hole 9 passes below the guide 17, the metering hole 9
A square cut is made by a guide 17 at the upper end. In the state in which the raw material has been squared as described above, that is, for example, at the next moment after the metering hole 9 passes below the guide 17, the raw material is completely discharged from the metering hole 9 by an appropriate means. Through the above operations, the raw material with a constant R is supplied in a fixed amount in the metering hole 9.

However, if the apparatus continues to operate as described above, the capacity of the raw material in the hopper 1 gradually decreases, and the pressure of the raw material decreases. In the above case, the raw material is not properly supplied from the hopper 1 to the quantitative table 2,
For this reason, it frequently occurs that the raw material is not introduced into the metering hole 9, or that the amount introduced is insufficient, which impedes the metered supply of the raw material. Further, a similar phenomenon occurs when the physical properties of the raw material in the hopper 1 change.

The metering supply device of the present invention solves the above-mentioned problems by controlling the raw material level in the metering table 2 to be constant.

That is, for example, if the supply of raw material from the hopper 1 to the quantitative table 2 is insufficient, the raw material level within the table 2 will drop to, for example, level L1 in the drawing. Raw material level L
1 is, for example, a relatively low level among the permissible raw material levels, or a level below which it is considered that if the raw material level falls, it will impede quantitative supply.

As mentioned above, when the raw material level in the quantitative table 2 decreases, the level detection lever 18 moves the detection surface 2 in response to this.
1 comes into contact with the upper surface of the raw material (level L 1), and slides using the shaft 20 as a fulcrum to the position shown by the solid line in the drawing. The movement of the detected part 32 in the level detection lever 18 is detected by the detection head 31 of the detector 19. In this case, the detected part 32 moves away from the detection head 31, and the detector 19 turns "OFF". ”, and this signal is transmitted to the transmission device 28.

The signals sent to the transmission device 28 are here converted into other suitable signals. Next, the signal converted by the transmission device 28 is analyzed and compared by the controller 29, and an operation signal based on this is sent to the adjustment device 29. Specifically, for example, the signal sent to the adjustment device 29 in the above-mentioned manner is such that when the raw material level in the joseki table 2 is low (level L1), the monochrome detector 19 is OFF. Based on this, the controller 29 sends the air cylinder 1
(An operation signal to raise the auxiliary gate 11 by activating 2 is sent to the adjustment device 3.

The air cylinder 12 of the adjustment device 3 is actuated by the operation signal from the controller 29, and the auxiliary gate 11 is activated.
is raised to a predetermined height, and the amount of raw material supplied from the hopper 1 into the metering table 2 is increased. Therefore, when the raw material level in the quantitative table 2 drops to a certain level, the quantitative table 2
The level of raw material within is raised, thereby maintaining a constant supply of raw material.

If the apparatus continues to operate in the above state, the raw material level in the quantitative table 2 will further rise, reaching level L2, for example. The raw material level L2 is, for example, a relatively high level among the allowable raw material levels, or a level at which it is considered that there is a risk that the raw material may leak out from the quantitative table 2 if the raw material level rises above this level. In the above case, the level detection lever 18 moves to the position indicated by the broken line in the drawing. In this case as well, the movement of the detected part 32 of the level detection lever 18 is detected by the detector 19 (the movement of the detected part 32 is continuously detected by the detector 19). When the detection unit 32 is close to the detection head 31,
ON” state, and this signal is transmitted to the transmission device 28 and controller 29 in exactly the same way as in the case described above. is high (
Level L 2) (detector 19 is “ON”)
Based on this, the controller 29 sends an operation signal to operate the air cylinder 11 and lower the auxiliary gate 11 to the adjustment device 3.
sent to.

The air cylinder 12 of the adjustment device 3 is actuated by the operation signal from the controller 29, and the auxiliary gate 11 is activated.
is lowered to a predetermined height, the amount of raw material fed from the hopper 1 into the metering table 2 is reduced, and the level of the raw material in the metering table 2 is thereby lowered.

By repeating the above operations, the raw material level in the quantitative table 2 is constantly maintained at a predetermined level (level L1 to L 2), whereby the raw material is constantly and uniformly introduced into the metering hole 9, and the raw material is metered extremely accurately and supplied in a fixed amount.

It goes without saying that in addition to the operation of the auxiliary gate 11 described above, the level of the raw material in the quantitative table 2 can be adjusted by adjusting the opening degree of the main gate 10.

(Effects of the Invention) As described above, according to the hopper-type quantitative feeding device of the present invention, the raw material can be fed extremely accurately without being affected by changes in the amount of raw material contained in the hopper or changes in the physical properties of the raw material. Not only can it be quantified, but it can also be supplied in fixed quantities. In addition, the main mechanism is extremely simple, and from these aspects, it has great advantages when used industrially.

[Brief explanation of drawings]

1 and 2 are a longitudinal sectional view and a plan view showing an embodiment of the hopper-type quantitative feeding device of the present invention, and FIGS. 3 and 4 show a conventional hopper-type quantitative feeding device. FIG. 1.40...Hopper, 2.42...
Quantitative table, 3... Adjustment device, 4...
・Introduction device, 5...Detection device, 6.6'...
...Raw material supply port, 7...Disc, 8.17
．． 44... Guide, 9.43... Metering hole, 10... Main gate, 11... Auxiliary gate. 12...Air cylinder, 13...
Guide rail, 14... Rotating shaft, 15...
・Shaft mounting part, 16... Stirring blade, 18...
・Level detection lever, 19...Detector, 20.
...Axis, 21...Detection surface, 23.24.
...Curved plate, 25.26...Support plate, 2
7...Volt, 28...Transmission device, 2
9...Controller, 31...Detection head, 32...Detected part.

Claims (1)

[Claims] (1) A rotatably provided quantitative table having one or more quantitative holes, (2) A hopper for supplying raw materials into the quantitative table, (3) Controlled by the detection device described below, and quantitatively determined from the hopper. An adjusting device for adjusting the amount of raw material supplied into the table; (4) a semiconductor device for introducing the raw material supplied to the quantitative table into the quantitative hole; (5) detecting the level of the raw material in the quantitative table. 1. A hopper-type quantitative supply device comprising: a detection device for extracting a necessary signal and controlling the adjustment device based on the signal.