JP2012159302A - Measuring vessel and measuring method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measuring vessel and a measuring method capable of easily adjusting the weight of a retained measuring object so as to correspond to measuring target weight by a simple configuration.SOLUTION: In the measuring method for measuring the weight of a granular material retained in a weighing hopper 4 by a load cell 5 while retaining the granular material by the weighing hopper 4 having a first open/close part 24 for discharging the granular material and a second open/close part 25 arranged independently of the first open/close part 24 to discharge the granular material, when the granular material of weight exceeding the measuring target weight is supplied to the weighing hopper 4, the second open/close part 25 is opened, and after adjusting the weight of the retained granular material so as to correspond to the measuring target weight, the first open/close part 24 is opened and the granular material is discharged from the weighing hopper 4.

Description

  The present invention relates to a measuring container for measuring a measuring object and a measuring method.

  Conventionally, a measuring device for measuring a granular material such as a resin pellet cut out from a screw feeder or the like is known.

  As such a metering device, for example, a metering and filling device including a metering bucket for storing a filling, a metering device for measuring the weight of the metering bucket, and a suction nozzle for sucking the filler from the metering bucket is known. (For example, refer to Patent Document 1 below.)

Japanese Patent Publication No. 61-30962

  However, in the above-described metering and filling apparatus described in Patent Document 1, firstly, a filling material to be weighed more than a certain amount is supplied to the measuring bucket, and an excess amount of the filler supplied into the measuring bucket is sucked with a suction nozzle. Thus, the filling in the measuring bucket is adjusted to a fixed amount.

  Therefore, when fine adjustment is necessary, such as when the excess amount is slight, the suction nozzle may excessively suck the filler in the measuring bucket, and the weight of the filler in the measuring bucket may be reduced. It is difficult to adjust precisely.

  Therefore, an object of the present invention is to provide a measuring container and a measuring method that can be easily adjusted so that the weight of a stored weighing object corresponds to the weighing target weight with a simple configuration. It is in.

  In order to achieve the above-mentioned object, the invention according to claim 1 is a measuring container in which the weight of the stored measuring object is measured by the measuring apparatus while storing the measuring object, The first opening / closing part that is opened after the measurement by the step is completed and discharges the measurement object from the weighing container, and the first opening / closing part is provided separately, and the weighing of the weight exceeding the measurement target weight is provided in the weighing container. A second opening / closing part that is opened to adjust the weight of the stored measurement object so as to correspond to the measurement target weight and discharges the measurement object from the measurement container when the object is supplied; It is characterized by having.

  According to such a configuration, the weighing container is configured such that the weight of the stored weighing object corresponds to the weighing target weight separately from the first opening / closing portion opened after the weighing by the weighing device is completed. A second opening / closing part that is opened when adjustment is performed is provided.

  Therefore, even when a weighing object having a weight exceeding the weighing target weight is supplied to the weighing container, the second opening / closing part different from the first opening / closing part is opened, and the excess weighing object , And the weight of the stored weighing object can be adjusted to correspond to the weighing target weight.

  As a result, with a simple configuration, the weight of the stored measurement object can be easily adjusted so as to correspond to the measurement target weight.

  According to a second aspect of the present invention, in the first aspect of the present invention, the weight of the weighing object discharged per unit time from the weighing container via the second opening / closing portion is the first opening / closing amount. It is characterized in that the amount is smaller than the weight of the weighing object discharged per unit time from the weighing container through the section.

  According to such a configuration, it is possible to finely adjust the weight of the stored weighing object by discharging the weighing object little by little from the weighing container via the second opening / closing part.

  As a result, it is possible to accurately correspond the weight of the stored measurement object to the measurement target weight.

  According to a third aspect of the present invention, in the first aspect of the present invention, the first opening / closing portion includes a first opening for discharging a measurement object from the weighing container, and the second opening / closing portion includes: A second opening for discharging the measurement object from the weighing container is provided, and the opening area of the second opening is smaller than the opening area of the first opening.

  According to such a configuration, it is possible to finely adjust the weight of the stored measurement object by discharging the measurement object from the measurement container little by little through the second opening.

  As a result, it is possible to accurately correspond the weight of the stored measurement object to the measurement target weight.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the second opening / closing part is disposed above the first opening / closing part. It is said.

  According to such a configuration, after adjusting the weight of the weighing object stored by opening the second opening / closing part, if the first opening / closing part is opened, all the weighing objects having the adjusted weight are discharged. can do.

  As a result, the weighing object with the adjusted weight can be reliably discharged.

  Further, the invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the lower end portion is formed with a squeezed portion whose opening cross-sectional area becomes smaller as it goes downward, The second opening / closing part is provided in the restricting part.

  According to such a structure, the 2nd opening-and-closing part is provided in the squeezed part from which an opening cross-sectional area becomes small as it goes below.

  For this reason, the weighing object can be discharged from the second opening / closing part at the throttle part where the weighing object is concentrated.

  As a result, regardless of the amount of the measurement object in the measurement container, the measurement object can be easily discharged from the measurement container.

  According to a sixth aspect of the present invention, in the first aspect of the present invention, a discharge pipe is provided that extends downward continuously from the lower end portion and discharges the measurement object. The second opening / closing part is provided in the middle of the discharge pipe, and the first opening / closing part is provided in the discharge pipe at a lower side than the second opening / closing part. Yes.

  According to such a configuration, the second opening / closing part is provided in the middle of the discharge pipe, and the first opening / closing part is provided on the discharge pipe below the second opening / closing part.

  Therefore, the measurement object can be discharged from the second opening / closing section in the discharge pipe through which the measurement object passes when the measurement object is discharged.

  As a result, regardless of the amount of the measurement object in the measurement container, the measurement object can be easily discharged from the measurement container.

  According to a seventh aspect of the present invention, there is provided a measuring container having a first opening / closing part for discharging a weighing object and a second opening / closing part provided separately from the first opening / closing part for discharging the weighing object. A weighing method for weighing the weight of the weighing object stored in the weighing container by the weighing device while storing the weighing object, wherein the weighing object has a weight exceeding the measurement target weight. An adjustment step of opening the second opening / closing part to adjust the weight of the stored weighing object so as to correspond to the weighing target weight when the object is supplied; and opening the first opening / closing part. And a discharging step of discharging the object to be measured from the measuring container.

  According to such a weighing method, when a weighing object having a weight exceeding the weighing target weight is supplied to the weighing container, the second opening / closing part different from the first opening / closing part is opened, and the excess amount is measured. The weighing object is discharged, and the weight of the stored weighing object is adjusted so as to correspond to the weighing target weight. After that, the first opening / closing part is opened and the weighing container corresponds to the weighing target weight. The object to be weighed can be discharged.

  As a result, with a simple configuration, the weight of the stored measurement object can be easily adjusted so as to correspond to the measurement target weight.

  According to the first aspect of the invention, it is possible to easily adjust the weight of the stored measurement object so as to correspond to the measurement target weight with a simple configuration.

  Further, according to the invention described in claim 2, it is possible to finely adjust the weight of the stored weighing object by discharging the weighing object little by little from the weighing container via the second opening / closing part. The weight of the stored weighing object can be made to correspond to the weighing target weight with high accuracy.

  In addition, according to the invention described in claim 3, it is possible to finely adjust the weight of the stored weighing object by discharging the weighing object little by little from the weighing container through the second opening, It is possible to accurately correspond the weight of the stored measurement object to the measurement target weight.

  Further, according to the invention described in claim 4, it is possible to reliably discharge the weighing object having the adjusted weight.

  According to the fifth aspect of the present invention, the weighing object can be discharged from the second opening / closing part at the throttle part where the weighing object is concentrated, regardless of the amount of the weighing object in the weighing container. The weighing object can be easily discharged from the weighing container.

  According to the invention described in claim 6, the measuring object can be discharged from the second opening / closing section in the discharge pipe through which the measuring object always passes when the measuring object is discharged. Regardless of the amount of the weighing object inside, the weighing object can be easily discharged from the weighing container.

  In addition, according to the seventh aspect of the invention, it is possible to easily adjust the weight of the stored measurement object so as to correspond to the measurement target weight with a simple configuration.

It is a schematic structure figure showing a measuring system provided with a measuring hopper as one embodiment of a measuring container of the present invention. It is a schematic block diagram which shows the modification of a weighing hopper.

  FIG. 1 is a schematic configuration diagram showing a weighing system including a weighing hopper as an embodiment of the weighing container of the present invention.

  As shown in FIG. 1, the weighing system 1 measures the weight of a granular material (an example of an object to be measured) such as resin pellets and supplies the weight to, for example, a molding system 30 (mixing device 31 and molding machine 32). And a measuring unit 2 for measuring the weight of the granular material, and a supply unit 3 for supplying the granular material to the measuring unit 2. In the present embodiment, a plurality of (two) measuring units 2 are provided in parallel with respect to one molding system 30. A plurality of (two) supply units 3 are provided in parallel with respect to one weighing unit 2.

  Each weighing unit 2 includes a weighing hopper 4 (an example of a weighing container) that stores powder particles and a load cell 5 (an example of a weighing device) that measures the weight of the weighing hopper 4.

  The weighing hopper 4 is formed so that a substantially cylindrical upper portion 21 and a substantially conical lower portion 22 (an example of a squeezed portion) whose opening cross-sectional area decreases toward the lower side are continuous. The upper end is formed with an opening 6 for receiving the granular material supplied from the supply unit 3, and the lower end thereof has a substantially circular shape for discharging the granular material from the weighing hopper 4. An outlet 23 (an example of a first opening) is formed. A discharge gate 7 that opens and closes the discharge port 23 is provided at the lower end of the weighing hopper 4. The discharge gate 7 constitutes the first opening / closing part 24 together with the discharge port 23.

  In addition, the weighing hopper 4 includes a second opening / closing part 25 separately from the first opening / closing part 24 in the middle of the lower part 22 in the vertical direction (that is, above the first opening / closing part 24).

  The second opening / closing part 25 is an adjustment opening 26 (an example of a second opening) formed in the middle of the lower portion 22 in the up-down direction and an adjustment extending outside the weighing hopper 4 so as to communicate with the adjustment opening 26. The discharge pipe 27 for adjustment and the adjustment valve 28 provided in the middle of the adjustment discharge pipe 27 are provided.

  The adjustment opening 26 is substantially circular and has an opening area smaller than that of the discharge port 23 (when the opening area of the discharge port 23 is 100%, the opening area is such that the granular material does not cause blocking). For example, the opening area is 1 to 100%, preferably 5 to 50%, more preferably 15 to 20%), and the granular material is discharged from the weighing hopper 4.

  The adjustment discharge pipe 27 is a pipe that has a substantially cylindrical shape and discharges the granular material from the weighing hopper 4 through the adjustment opening 26.

  The adjustment valve 28 is provided at the upstream end of the adjustment discharge pipe 27 in the discharge direction, and opens and closes the adjustment opening 26.

  The load cell 5 is configured to be able to measure the weight of the granular material stored in the weighing hopper 4 while supporting the measuring hopper 4, and the weight of the granular material stored in the measuring hopper 4 is: The weight is measured by the load cell 5 while the weight of the tare (the weighing hopper 4) is canceled.

  Each supply unit 3 includes a storage hopper 8 that stores powder particles and a screw feeder 9 that cuts out the powder particles in the storage hopper 8, and the powder particles cut out by the screw feeder 9 are measured by the measuring unit 2. Supply to hopper 4.

  The storage hopper 8 is formed such that the substantially cylindrical upper portion and the substantially conical lower portion whose opening cross-sectional area decreases toward the lower side are continuous.

  The screw feeder 9 includes a supply cylinder portion 10, a screw 11, and a motor 12.

  The supply cylinder part 10 is formed in a substantially cylindrical shape extending in a substantially horizontal direction, and is continuous with the lower end part of the storage hopper 8 at one end part. In addition, a supply port 13 that opens downward is formed at the other end of the supply cylinder portion 10 so as to face the receiving port 6 of the weighing hopper 4.

  The screw 11 is rotatably mounted in the supply cylinder part 10 along the direction in which the supply cylinder part 10 extends.

  The motor 12 is connected to one end of the screw 11 and rotates the screw 11.

  And the granular material in the storage hopper 8 is conveyed from one side to the other in the supply cylinder part 10 by rotation of the screw 11, and is cut out from the supply port 13 of the supply cylinder part 10.

  Next, an embodiment of the weighing method of the present invention using the above-described weighing system 1 will be described.

  In order to weigh the powder particles using the weighing system 1, first, the discharge gate 7 and the adjustment valve 28 are closed, and the weight of the tare (weighing hopper 4) being weighed in the load cell 5 is cancelled.

  Next, the screw feeder 9 is operated to supply the powder particles to the weighing hopper 4 while weighing the weighing hopper 4 with the load cell 5.

  And if the weight of the granular material in the measurement hopper 4 reaches a predetermined measurement target weight, the screw feeder 9 is stopped.

  At this time, since the weighing hopper 4 is vibrated by the dropping of the granular material from the screw feeder 9, the load cell 5 reduces the weight of the granular material in the measuring hopper 4 after the vibration of the weighing hopper 4 is settled. Weigh accurately.

  If the weight of the powder particles in the weighing hopper 4 corresponds to the weighing target weight (matches including an allowable error), the weighing by the load cell 5 is finished.

  Here, when the weight of the granular material in the measurement hopper 4 does not correspond to the measurement target weight, the weight of the granular material in the measurement hopper 4 is adjusted so as to correspond to the measurement target weight.

  When the weight of the granular material in the weighing hopper 4 is insufficient with respect to the measurement target weight, the screw feeder 9 is driven again and the measuring hopper 4 is replenished with the insufficient granular material, and the weighing is performed. The weight of the granular material in the hopper 4 is made to correspond to the measurement target weight.

  When the weight of the powder in the weighing hopper 4 exceeds the target weight, the adjustment valve 28 is opened to open the adjustment opening 26, and the excess powder from the weighing hopper 4 is removed. Then, the weight of the powder particles in the weighing hopper 4 is made to correspond to the weighing target weight (preparation step).

  At this time, as described above, the adjustment opening 26 has an opening area smaller than that of the discharge opening 23. Thereby, the adjustment opening 26 discharges the granular material from the weighing hopper 4 by a smaller amount than the weight of the granular material discharged from the weighing hopper 4 through the discharge port 23 per unit time.

  Then, if the excess powder particles are discharged from the weighing hopper 4 via the adjustment discharge pipe 27 and the weight of the powder particles in the measurement hopper 4 corresponds to the measurement target weight, the adjustment valve 28 is closed, Complete the adjustment process.

  In this way, the measurement of the powder particles by the measurement system 1 is completed.

  Thereafter, the discharge gate 7 is opened, and the granular material is discharged from the weighing hopper 4 to the mixing device 31 of the molding system 30 (discharge process).

  In addition, the measurement of the granular material by the measurement system 1 is implemented sequentially about each supply part 3 provided in parallel with respect to the measurement hopper 4. FIG. Specifically, the measuring hopper 4 on the left side of the paper in FIG. 1 will be described. First, the granular material (referred to as granular material A) in one supply unit 3 is weighed, and the granular material is measured in the measuring hopper 4. In a state where the body A is stored, the powder body (referred to as a powder body B) in the other supply unit 3 is weighed, and thereafter, the powder body A and the powder body B are combined at once. It discharges to the mixing device 31.

  And the granular material discharged | emitted from the measurement hopper 4 to the mixing apparatus 31 is mixed within the mixing apparatus 31, and is fuse | melted and shape | molded in the molding machine 32. FIG.

  According to this weighing hopper 4, as shown in FIG. 1, the weight of the stored granular material is separated from the weighing hopper 4 separately from the first opening / closing part 24 that is opened after the weighing by the load cell 5 is completed. A second opening / closing part 25 is provided that is opened when adjustment is performed so as to correspond to the measurement target weight.

  For this reason, even when powder particles having a weight exceeding the measurement target weight are supplied to the weighing hopper 4, the second opening / closing part 25 different from the first opening / closing part 24 is opened and the excess amount is exceeded. The granular material is discharged, and the weight of the stored granular material can be adjusted to correspond to the measurement target weight.

  As a result, it is possible to easily adjust the weight of the stored granular material so as to correspond to the measurement target weight with a simple configuration.

  Further, according to the weighing hopper 4, the weight of the granular material discharged from the weighing hopper 4 through the second opening / closing unit 25 per unit time is from the weighing hopper 4 through the first opening / closing unit 24. The amount is smaller than the weight of the granular material discharged per hit.

  Therefore, it is possible to finely adjust the weight of the stored granular material by discharging the granular material from the weighing hopper 4 little by little via the second opening / closing part 25.

  As a result, the weight of the stored granular material can be made to correspond to the measurement target weight with high accuracy.

  Further, according to the weighing hopper 4, the opening area of the adjustment opening 26 is smaller than the opening area of the discharge port 23, as shown in FIG. 1.

  Therefore, it is possible to finely adjust the weight of the stored granular material by discharging the granular material from the weighing hopper 4 little by little through the adjustment opening 26.

  As a result, the weight of the stored granular material can be made to correspond to the measurement target weight with high accuracy.

  Further, according to the weighing hopper 4, the second opening / closing part 25 is disposed above the first opening / closing part 24 as shown in FIG. 1.

  Therefore, if the first opening / closing part 24 is opened after the second opening / closing part 25 is opened and the weight of the stored powder is adjusted, all the adjusted particles can be discharged. .

  As a result, the granular material having the adjusted weight can be reliably discharged.

  Moreover, according to this weighing hopper 4, the 2nd opening-and-closing part 25 is provided in the lower part 22 where an opening cross-sectional area becomes small as it goes below.

  Therefore, the granular material can be discharged from the second opening / closing part 25 in the lower portion 22 where the granular material concentrates.

  As a result, regardless of the amount of powder particles in the weighing hopper 4, the powder particles can be easily discharged from the weighing hopper 4.

  In addition, according to this weighing method, when a granular material having a weight exceeding the weighing target weight is supplied to the weighing hopper 4, the second opening / closing part 25 different from the first opening / closing part 24 is opened, The excess particulate matter is discharged, the weight of the stored particulate matter is adjusted so as to correspond to the measurement target weight, and then the first opening / closing part 24 is opened, from the weighing hopper 4, The granular material having a weight corresponding to the measurement target weight can be discharged.

  As a result, it is possible to easily adjust the weight of the stored granular material so as to correspond to the measurement target weight with a simple configuration.

  In the above-described embodiment, the second opening / closing portion 25 is provided in the middle of the lower portion 22 of the weighing hopper 4. However, for example, as shown in FIG. 2, the lower end portion of the lower portion 22 is provided in the weighing hopper 4. It is also possible to provide a discharge pipe 41 continuously extending downward and to provide the first opening / closing part 24 and the second opening / closing part 25 in the discharge pipe 41. In FIG. 2, members similar to those in the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.

  The first opening / closing part 24 is provided at the lower end of the discharge pipe 41. Specifically, a discharge port 23 is formed at the lower end portion of the discharge pipe 41 and a discharge gate 7 that opens and closes the discharge port 23 is provided.

  The second opening / closing part 25 is provided in the middle of the discharge pipe 41 above the first opening / closing part 24. Specifically, the adjustment opening 26 is formed in the side wall of the discharge pipe 41, and the adjustment discharge pipe 27 is branched from the discharge pipe 41 so as to communicate with the adjustment opening 26. An adjustment valve 28 is provided at the upstream end of the adjustment discharge pipe 27 in the discharge direction.

  According to this configuration, the second opening / closing part 25 is provided in the middle of the discharge pipe 41, and the first opening / closing part 24 is provided in the discharge pipe 41 below the second opening / closing part 25. .

  Therefore, the granular material can be discharged from the second opening / closing part 25 in the discharge pipe 41 through which the granular material always passes when the granular material is discharged.

  As a result, regardless of the amount of powder particles in the weighing hopper 4, the powder particles can be easily discharged from the weighing hopper 4.

  Further, as the adjustment valve 28 of the second opening / closing part 25, a known electromagnetic valve that can be automatically opened and closed in conjunction with measurement by the load cell 5, or a known valve that can be manually opened and closed by the user can be used.

  Moreover, the granular material discharged | emitted via the 2nd opening-and-closing part 25 can also be supplied to the storage hopper 8 of the supply part 3 again.

  Moreover, the form of the measurement object is not limited to the powder and granular material, and may be, for example, a liquid.

  Moreover, in above-mentioned embodiment, after measuring the granular material A, in the state by which the granular material A is stored in the measurement hopper 4, the granular material B is measured, and after that, the granular material A and The powder B is discharged to the mixing device 31 at a time, but the timing of discharging from the weighing hopper 4 to the mixing device 31 is not particularly limited. For example, the powder A is first measured and discharged to the mixing device 31. After that, the powder B can be measured and discharged to the mixing device 31.

4 Weighing hopper (an example of a weighing container)
5 Load cell (an example of a weighing device)
22 Lower part (example of squeezing part)
23 Discharge port (example of first opening)
24 first opening / closing part 25 second opening / closing part 26 opening for adjustment (an example of second opening)
41 discharge pipe

Claims (7)

A weighing container in which the weight of a stored weighing object is measured by a weighing device while storing the weighing object,
A first opening / closing part that is opened after the weighing by the weighing device is completed and discharges the weighing object from the weighing container;
Provided separately from the first opening / closing part, when the weighing object having a weight exceeding the weighing target weight is supplied to the weighing container, the weight of the weighing object stored is equivalent to the weighing target weight. And a second opening / closing part that is opened to adjust the discharge object and discharges the measurement object from the measurement container.   The weight of the weighing object discharged from the weighing container per unit time via the second opening / closing part is the weight of the weighing object discharged per unit time from the weighing container via the first opening / closing part. The measuring container according to claim 1, wherein the measuring container is in a smaller amount. The first opening / closing part includes a first opening for discharging a measurement object from the weighing container,
The second opening / closing part includes a second opening for discharging a measurement object from the weighing container,
The measuring container according to claim 1, wherein an opening area of the second opening is smaller than an opening area of the first opening.   4. The measuring container according to claim 1, wherein the second opening / closing part is disposed above the first opening / closing part. 5. In the lower end portion, a squeezed portion is formed in which the opening cross-sectional area decreases as it goes downward,
The measuring container according to any one of claims 1 to 4, wherein the second opening / closing part is provided in the squeezing part. It extends continuously downward from the lower end and has a discharge pipe for discharging the object to be measured,
The second opening / closing part is provided in the middle of the discharge pipe,
5. The measuring container according to claim 1, wherein the first opening / closing part is provided in the discharge pipe below the second opening / closing part. While storing a measuring object using a measuring container that is provided separately from the first opening and closing part that discharges the weighing object and has a second opening and closing part that discharges the weighing object, A measuring method for measuring a weight of a measuring object stored in the measuring container by a measuring device,
When a weighing object exceeding the weighing target weight is supplied to the weighing container, the second opening / closing part is opened so that the weight of the weighing object stored corresponds to the weighing target weight. An adjustment process to adjust;
And a discharging step of discharging the object to be measured from the measuring container by opening the first opening / closing part.

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