JP2008267874A - Device and method for high-speed weighing granular material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To weigh high-speed granular material, by reducing the process time for measurement, as well as, heightening the probability of the measuring granular material is within the range of objective weight by improving the measurement precision. <P>SOLUTION: A device is provided with a hopper 3 for storing the granular material; an inclined rotary disk 10 provided with a plurality of weighing spaces at the outer periphery; a first motor 27 for rotation driving the disk; and the weighing device 30, arranged under the rotary disk for weighing the volumetric measured granular material. This weighing meter is provided with the rotary weighing frame 31, provided with the bottomless cylindrical part 33 for storing and keeping the volumetrically measured granular material; the automatic weighing meter 37 arranged under the rotary weighing frame for weighing the weight of the granular material stored and kept in the bottomless rotary cylinder part, the second transport port 41 arranged under the rotary weighing frame; and a second motor 39 for rotary driving the rotary weighing frame. The volumetrically measured granular material is discharged into the bottomless cylindrical part which is provided with the rotary weighing frame of the weighing meter. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a granular material measuring device and a granular material measuring method, and more specifically, a weighing device for weighing granular materials with high speed and high accuracy by measuring weight after volumetric measurement and It depends on the weighing method. Here, examples of the granular material include foods such as peanuts and other beans, tablets and beads.

  Conventionally, as a measuring device for granular materials, an empty container having a constant weight is filled with a predetermined amount of granular material supplied from the granular material supply unit, and the container filled with the granular material is conveyed by a belt conveyor. While measuring the weight, it is determined whether or not the measured weight is within a predetermined range. Based on the determination result, the containers filled with the powder are distributed, and the container is passed to the next process. There was a device that was once restored and refilled into an empty container (see Patent Document 1).

  In such an apparatus, the powder supply unit for filling a predetermined amount of powder into an empty container includes a vibratory parts feeder that supplies a fixed amount of powder, a rotary air cylinder disposed below the outlet of the parts feeder, etc. And a pair of funnels arranged on the left and right below the sorting cylinder and provided with an open / close shutter in each of the lower openings, and the lower sides of the pair of funnels It is the structure provided with the one main funnel which opened the upper side under the opening part. And the belt conveyor which intermittently conveys a container is arrange | positioned under the main funnel.

  Particulates continuously supplied by the parts feeder are distributed to the left and right funnels with the supply weight set continuously according to the supply amount control of the parts feeder itself and the swing speed of the sorting cylinder. It is done. Even if the left and right funnels are alternately supplied with a predetermined amount of powder, keep the shutter closed until the empty container is conveyed by the belt conveyor under the main funnel. When the empty container arrives and stops temporarily, the shutter is opened and the granular material is dropped and supplied into the container at once. By this alternate supply, the supply time of the powder particles to the container can be provided, and the container containing the powder particles can be sent by the belt conveyor that intermittently moves to the automatic weighing machine side. ing.

The automatic weigher receives a container containing powder particles from an upstream belt conveyor and weighs it with a load cell while carrying it on a moving weighing table, and determines whether or not the target weight is acceptable.
JP-A-9-221102

  However, in such a conventional granular material measuring apparatus, the measurement accuracy depends on the granular material supply speed of the parts feeder, and therefore it is difficult to expect stable measurement accuracy. Therefore, even if the weight of the granular material that has entered the container in the subsequent process is measured, the probability of being within the range of the target weight is low, which causes a reduction in measurement efficiency.

  In addition, since the granular material is supplied through the parts feeder, it is difficult to increase the granular material supply speed above a certain level, and there is a problem that the measuring speed cannot be increased above a certain level.

  The present invention has been made in view of such problems, and the object of the present invention is to increase the probability of being within the range of the target weight by improving the weighing accuracy and to reduce the measurement tact time. It is an object to provide a high-speed weighing device and a weighing method for a granular material.

  In order to solve the above-described problem, in the invention described in claim 1, a hopper for storing the granular material and an inclined hopper disposed in the hopper are provided for volumetric measurement of the granular material. An inclined rotating disk having a plurality of measuring spaces on the outer periphery, a first motor for rotationally driving the inclined rotating disk, and a lower part of the rotating disk for measuring the weight of the particulate matter volume-measured by the inclined rotating disk The weight measuring instrument is disposed at the bottom of the rotary measuring frame, and the weight measuring instrument is disposed below the rotating measuring frame. An automatic weigher for measuring the weight of the granular material stored and held in the bottomless cylindrical portion, a second transfer port arranged below the rotary weighing frame, and for rotationally driving the rotary weighing frame The second motor, and the inclined rotating disk By rotating it, the bottom of one measuring space is opened at the first transfer port, and the volume-measured granular material is discharged into the bottomless cylindrical part provided in the rotary measuring frame of the weighing instrument. Furthermore, the bottomless cylindrical part is moved onto the second transfer port by rotating the rotary measuring frame, and the particulate matter is discharged to the second transfer port. It was set as the high-speed metering apparatus of the granular material of the structure which can do.

Further, in the invention described in claim 2, in the high-speed weighing device according to claim 1, the bottomless cylindrical portion provided in the rotating weighing frame of the weight measuring device is composed of a plurality of parts, and the rotating weighing frame Is further provided with a return port, a second transfer port is used to transport the accepted weight granules to the next process, and a return port is returned to the hopper for reweighing the rejected weight granules. Based on the weight value measured by the automatic weigher, the bottomless cylindrical part in which the granular material to be measured of the rotary weighing frame is stored and held is positioned above the second port position or the return port position. As described above, a control device for driving and controlling the second motor is further provided.

  Further, in the invention described in claim 3, in the high-speed weighing device according to claim 1 or 2, there is provided 1 for turning the granular material in the weighing space into a “slip” state on the inclined rotating disk. Or it was set as the structure further equipped with a some braid | blade.

  Furthermore, in the invention described in claim 4, in the high-speed metering device described in claim 3, the accuracy of volumetric measurement of the granular material is increased on the upstream side in the rotation direction of the first transfer port of the inclined rotating disk. The adjustment port is provided, and one or a plurality of blades are arranged above the adjustment port.

  Further, in the invention described in claim 5, in the high-speed weighing device according to claim 3 or 4, the amount of the granular material to be weighed in the measurement space is finely adjusted below the inclined rotation disk adjustment port. In order to achieve this, a slidable shutter and an electric actuator for driving the shutter are provided.

  Further, in the invention described in claim 6, in the high-speed weighing device described in claim 5, the control device controls the electric actuator based on the weight value measured by the automatic weigher, thereby reducing the opening amount of the shutter. It was set as the structure adjusted.

  Further, in the invention described in claim 7, in the high-speed weighing device according to any one of claims 1 to 6, a discharge port is provided at the bottom portion of the hopper for releasing the granular waste. did.

  Furthermore, in the invention described in claim 8, the step of volumetric measurement of the granular material by the measurement space provided in the inclined rotating disk disposed in an inclined manner in the hopper for storing the granular material, and the volumetric measurement The transferred granular material into the bottomless cylindrical portion of the rotary measuring frame of the weight measuring device, the step of measuring the weight of the granular material transferred into the bottomless cylindrical portion, and the weight measurement result Is discharged to the second transfer port when the value is within the predetermined value range, and discharged to the return port when the weight measurement result is outside the predetermined value range. A high-speed weighing method of the granular material composed of the step of sorting by.

  Further, in the invention described in claim 9, in the high-speed measurement method for granular objects described in claim 8, the step of finely adjusting the volume of the measurement space provided in the inclined rotating disk based on the result of the weight measurement Is further provided.

  As described above, the present invention uses a tilted rotating disk that is tilted in a hopper to first weigh particles and then actually weigh the volumetric particles. It is determined whether it is within the target weight, and the granular material is sent to the next process only when it is within the target weight. In addition, the size of the measurement space for volumetric measurement can be automatically finely adjusted based on the weighing result.

  Therefore, in the present invention, by improving the measurement accuracy by volumetric measurement, it is possible to increase the probability of being within the range of the target weight, and measurement is performed because a system in which the supply speed of the granular material is not limited is adopted. It has become possible to shorten the tact time, and to realize a high-speed weighing device and a weighing method for the granular material.

  An embodiment of the high-speed measuring device 1 for granular materials will be described in detail with reference to the drawings. The high-speed weighing device 1 for granular materials shown in FIG. 1 includes a hopper 3 for storing granular materials 5 for weighing. An inclined rotating disk 10 for measuring the volume of the granular material 5 is disposed in the hopper 3. Since the inclined disk 10 is arranged in the hopper 3 in this way, the three-dimensional shape of the hopper 3 may be determined so that the inclined rotating disk 10 constitutes a part of the outer wall of the hopper 3, Alternatively, the outer wall shape of the hopper 3 may be a conical shape or a pyramid shape, and the inclined rotating disk 10 may be disposed therein. The inclined rotating disk 10 includes a disk-shaped rotating member 11 and a plate-shaped fixing member 13 disposed below the rotating member 11 (the inclined rotating disk 10 includes a disk-shaped rotating member 11 and It is defined that both of the fixing members 13 are included). Although the inclined rotating disk 10 is disposed to be inclined at a predetermined angle with respect to the vertical plane, the inclination angle is not particularly limited.

  On the outer periphery of the rotating member 11, a plurality of cavities forming the measuring space 15 of the inclined rotating disk 10 are provided. It is desirable to arrange these measuring spaces 15 at equal intervals on the circumference in the design of the apparatus (see FIG. 2).

  A first motor 27 for rotating the disk-shaped rotating member 11 of the inclined rotating disk 10 is disposed below the inclined rotating disk 10. The first motor 27 may be directly connected to the rotating member 11, but may be connected via a gear, a pulley and a belt or the like.

  A first notch (referred to as “first transfer port” 17) is provided at a position above the inclined fixing member 13, and a cavity (metering space 15) of the rotating member 11 is provided at this position. When it rotates, the bottom surface of the measuring space 15 opens. A duct for transferring the granular material 5 to the weight measuring device 30 is arranged below the first transfer port 17 (see FIG. 2). Therefore, when the cavity (metering space 15) of the rotating member 11 rotates to the position of the first transfer port 17, the granular material 5 in the measuring space 15 falls into the duct and is disposed below. It is discharged to the weight measuring instrument 30.

  The size of the cavity (measuring space 15) of the rotating member 11 on the upstream side (meaning the upstream side in the direction in which the rotating member 11 rotates) of the first notch portion (first transfer port 17) of the fixing member 13. An adjustment port 19 for finely adjusting the height may be provided. At the position of the adjustment port 19, the fixing member 13 is provided with a second notch (adjustment port 19) (see FIG. 2). A shutter 21 for finely adjusting the size of the cavity (metering space 15) of the rotating member 11 is disposed on the lower surface of the second notch (adjustment port 19) of the fixing member 13 (FIG. 2). , 3).

  The shutter 21 is slidably disposed along the lower surface of the fixed member 13, and the opening amount of the shutter 21 can be controlled by an electric actuator 23. As an example of the electric actuator 23, a rotary motion of the electric motor may be converted into a linear motion, or the linear motion may be directly controlled by a linear actuator. In any case, any type of electric actuator may be used as the electric actuator 23 as long as the position of the shutter can be controlled.

  In this way, by driving and controlling the position of the shutter 21, the size of the weighing space 15 can be finely adjusted. As will be described later, based on the actually measured weight data measured by the weight measuring instrument 30, It is possible to perform feedback control so that the volume-measured granular material falls within a predetermined weight range with a higher probability.

  At a position where the second notch (adjustment port 19) of the fixing member 13 is provided, a blade for bringing the granular material in the measuring space 15 into a “slip” state on the upper surface of the rotating member 11 25 may be fixedly arranged. Although the blade 25 is fixed, when the rotating member 11 rotates, the tip portion of the blade 25 slides along the upper side surface of the rotating member 11, so that the measuring space 15 is moved upward. The protruding granular material 5 is scraped out and can be brought into a “slip-off” state. Although a metal blade can be used as the blade 25, it is desirable to use a plastic blade or a silicon rubber blade in order to reduce the possibility of damaging the particles as much as possible (see FIG. 2 and 3).

  Here, the case where only one blade 25 is arranged has been described, but a plurality of blades are arranged side by side so that the “slipping” is completed while the rotating member 11 rotates at a relatively small angle. Also good.

  Here, the blade 25 is described as being disposed at the position where the second notch (adjustment port 19) of the fixing member 13 is provided, but the present invention is not limited to this, and the fixing member 13 is not limited thereto. The blade 25 may be fixedly disposed at a position other than the position where the second notch (adjustment port 19) is provided.

  Next, based on FIG. 1 and FIG. 4, the weight measuring device 30 for measuring the weight of the granular material 5 whose volume is measured by the inclined rotating disk 10 will be described.

  The weight measuring device 30 is disposed below the inclined rotating disk 10, and includes a rotary measuring frame 31 including a bottomless cylindrical portion 33 that accommodates and holds the granular material 5 whose volume is measured by the inclined rotating disk 10. An automatic weigher 37 for measuring the weight of the granular material 5 stored and held in the bottomless cylindrical portion 33 and a second motor 39 for rotationally driving the rotary measuring frame 31 are arranged.

  As described above, the granular material 5 whose volume is measured by the inclined rotating disk 10 is discharged from the first transfer port 17 of the inclined rotating disk 10 through the duct. In order to receive the granular material 5, a bottomless cylindrical portion 33 is provided on the upper surface of the rotary measuring frame 31. When the granular material 5 is received in the bottomless cylindrical portion 33, the weight of the granular material 5 is directly measured by the automatic weighing device 37.

  On the lower surface of the rotary weighing frame 31, a tray 35 of the automatic weighing device 37 is arranged. A transfer duct (referred to as a “second transfer port” 41) is provided on the side of the tray 35. When the bottomless cylindrical portion 33 of the rotary measuring frame 31 rotates to this position, the bottom surface of the bottomless cylindrical portion 33 communicates with the second transfer port. The second transfer port 41 is configured to transfer the granular material 5 to the next process. Therefore, after the granular material 5 is accommodated in the bottomless cylindrical portion 33 and the weight of the granular material 5 is measured, the rotary measuring frame 31 is rotated by the second motor 39 and the bottomless cylindrical portion 33 is measured. When the cylindrical part 33 is rotated above the position of the second transfer port 41, the granular material 5 whose weight has been measured is transferred to the next process via the duct.

  In the above description, the number of bottomless cylindrical portions 33 provided on the rotary measuring frame 31 is not particularly limited, but a plurality of bottomless cylindrical portions 33 may be provided. By providing a plurality of bottomless cylindrical portions 33, it becomes possible to simultaneously perform the step of transferring the measured granular material to the next step and the step of receiving the granular material 5 volumetrically measured by the inclined rotating disk 10, This leads to a shortening of the tact time of the measurement, and the speeding up of the measurement can be realized.

  Further, a “return port” 43 (see FIG. 5) may be provided on the side of the tray 35 of the automatic weighing device 37 (the side opposite to the “second transfer port” 41). The return port 43 is constituted by a duct for returning the granular material 5 into the hopper 3.

  By providing such a return port 43, for example, if the actually measured weight data of the granular material 5 received in the bottomless cylindrical portion 33 is within a predetermined weight range, the rotary measuring frame 31 is rotated. The bottomless cylindrical portion 33 containing the granular material 5 is rotated above the position of the second transfer port 41, and this granular material is used as an acceptable weight granular material. To the next process.

  In addition, if the measured weight data of the granular material 5 received in the bottomless cylindrical portion 33 is outside the predetermined weight range, the rotary weighing frame 31 is rotated, and the bottomless material containing the granular material 5 is entered. The cylindrical portion 33 is rotated above the position of the return port 43 so that the granular material can be returned to the hopper 3 through the return port 43 as an unacceptable weight granular material. .

  In this way, while determining whether the weighed granular material 5 is within a predetermined weight range, it is possible to quickly select whether to send to the next process or return to the hopper 3 for reweighing. Can be performed.

  Next, the control device 50 of the high-speed weighing device 1 will be described.

  The control device 50 (not shown) includes a first motor 27 for rotationally driving the inclined rotating disk 10, and an electric actuator 23 for driving a shutter 21 disposed in the adjustment port 19 of the inclined rotating disk 10. The second motor 39 that rotationally drives the rotary measuring frame 31 of the weight measuring device 30 is driven and controlled.

  In particular, the control device 50 drives the electric actuator 23 based on the difference between the weight data of the granular material measured by the weight measuring device 30 and the target weight, and is arranged in the adjustment port 19 of the inclined rotating disk 10. By adjusting the opening amount of the shutter 21 and finely adjusting the size of the measuring space 15, feedback control can be performed so that the weight of the granular material 5 to be measured always falls within the range of the target weight. ing.

  Further, the control device 50 controls the rotation of the second motor 39 that rotationally drives the rotary measuring frame 31 of the weight measuring device 30. If the measured weight data of the granular material 5 stored and held in one of the plurality of bottomless cylindrical portions 33 arranged on the rotary weighing frame 31 is within a predetermined weight range, the rotary weighing frame 31 is driven to rotate. The bottomless cylindrical portion 33 is brought to the position of the second transfer port 41, and the granular material 5 stored and held in the bottomless cylindrical portion 33 is controlled to be transferred to the next step. Can be done.

  On the other hand, if the measured weight data of the granular material 5 stored and held in one of the plurality of bottomless cylindrical portions 33 is out of the predetermined weight range, the rotary weighing frame 31 is driven to rotate in the direction opposite to the previous time. The bottomless cylindrical portion 33 is brought to the position of the return port 43, and the granular material 5 stored and held in the bottomless cylindrical portion 33 is returned to the hopper 3 for reweighing. It can be controlled.

  In addition, in the hopper that stores the granular material, during the operation, there is a case where the crushing waste of the granular material may accumulate, in order to prevent the accumulation of such crushing waste, in the lower part of the hopper, It is also possible to provide a discharge port for releasing the crushed waste.

FIG. 1 is a diagram schematically showing a high-speed weighing device for granular materials according to the present invention. FIG. 2 is a front view of the inclined rotating disk as viewed from the direction of arrow A shown in FIG. FIG. 3 is a perspective view of a high-speed weighing device for granular materials according to the present invention. FIG. 4 shows a partial cross section of the weight measuring instrument according to the present invention. FIG. 5 is a plan view of a weight measuring instrument according to the present invention. FIG. 6 is a perspective view of a weight measuring instrument according to the present invention.

Explanation of symbols

1 High-speed weighing device
3 Hopper
5 Granules
10 Tilt rotating disc
11 Rotating member
13 Fixing member
15 Weighing space
17 First transfer port
19 Adjustment port
21 Shutter
23 Electric actuator
25 blades
27 First motor
30 Weighing instrument
31 Rotating weighing frame
33 Bottomless cylindrical part
35 saucer
37 Automatic weigher
39 Second motor
41 Second transfer port
43 Return port
50 Control unit

Claims (9)

A hopper for storing granules,
An inclined rotating disk that is arranged in an inclined manner in the hopper and has a plurality of measuring spaces for measuring the volume of the granular material on the outer periphery;
A first motor for rotationally driving the inclined rotating disk;
In order to measure the weight of the granular material volume-measured by the inclined rotating disk, a weight measuring device arranged below the rotating disk;
The weight measuring instrument consists of
A rotary measuring frame having a bottomless cylindrical portion for storing and holding volumetrically measured particles;
An automatic weigher that is arranged below the rotating weighing frame and measures the weight of the granular material stored and held in the bottomless cylindrical portion;
A second transfer port disposed below the rotary weighing frame;
A second motor for rotationally driving the rotary weighing frame;
Consists of
By rotating and driving the inclined rotating disk, the bottom of one weighing space is opened at the first transfer port, and the volume-measuring granular material is provided on the rotating weighing frame of the weight measuring device. It can be discharged into the cylindrical part,
Furthermore, the bottomless cylindrical portion is moved onto the second transfer port by rotationally driving the rotary measuring frame, and the particulate matter can be discharged to the second transfer port. A high-speed weighing device for granular materials. The high-speed weighing device according to claim 1,
The bottomless cylindrical portion provided in the rotary measuring frame of the weight measuring device comprises a plurality of parts,
A return port is further provided below the rotary weighing frame,
The second transfer port is used to transport the accepted weight granules to the next step, and the return port is used to return the reject weight granules to the hopper to reweigh;
Based on the weight value measured by the automatic weigher, the bottomless cylindrical portion in which the granular object to be measured of the rotating weighing frame is stored and held is positioned above the second port position or the return port position. A high-speed metering device for granular materials, further comprising a control device for driving and controlling the second motor. A high-speed weighing device according to claim 1 or 2,
A high-speed measuring device for granular materials, further comprising one or a plurality of blades for bringing the granular materials in the measurement space into a “slip” state on the inclined rotating disk. The high-speed weighing device according to claim 3,
On the upstream side in the rotational direction of the first transfer port of the inclined rotating disk, an adjustment port for increasing the accuracy of volumetric measurement of the granular material is provided,
A high-speed weighing device for granular materials, wherein the one or more blades are arranged above the adjustment port. The high-speed weighing device according to claim 3 or 4,
A slidable shutter and an electric actuator for driving the shutter are provided in order to finely adjust the amount of the particles to be weighed in the measurement space below the inclined rotation disk adjustment port. A high-speed weighing device for granular materials. The high-speed weighing device according to claim 5,
A high-speed weighing device for granular materials, wherein the opening amount of the shutter is adjusted by the control device controlling the electric actuator based on a weight value measured by the automatic weighing machine. The high-speed weighing device according to any one of claims 1 to 6,
A high-speed weighing apparatus for granular materials, characterized in that a discharge port is provided at the bottom of the hopper for releasing broken particles of granular materials. A step of volumetrically measuring the granular material by a measuring space provided in an inclined rotating disk disposed in an inclined manner in a hopper for storing the granular material;
Transferring the volume-measured granular material into a bottomless cylindrical portion in a rotary measuring frame of the weight measuring device;
Measuring the weight of the granular material transferred into the bottomless cylindrical portion;
When the weight measurement result is within a predetermined value range, the granular material is discharged to the second transfer port. When the weight measurement result is outside the predetermined value range, the granular material is discharged. A method for high-speed weighing of granular materials, comprising the step of sorting by discharging to a return port. It is a high-speed measuring method of the granular material according to claim 8,
A method for high-speed measurement of granular materials, further comprising the step of finely adjusting the volume of the measurement space provided in the inclined rotating disk based on the result of the weight measurement.

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