WO2018155606A1 - Weighing device, gate, and method of operating weighing device - Google Patents

Weighing device, gate, and method of operating weighing device Download PDF

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Publication number
WO2018155606A1
WO2018155606A1 PCT/JP2018/006612 JP2018006612W WO2018155606A1 WO 2018155606 A1 WO2018155606 A1 WO 2018155606A1 JP 2018006612 W JP2018006612 W JP 2018006612W WO 2018155606 A1 WO2018155606 A1 WO 2018155606A1
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WO
WIPO (PCT)
Prior art keywords
weighing
storage tank
tank
supply gate
weighing device
Prior art date
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PCT/JP2018/006612
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French (fr)
Japanese (ja)
Inventor
和博 西村
亮典 北中
Original Assignee
株式会社サタケ
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Publication date
Application filed by 株式会社サタケ filed Critical 株式会社サタケ
Priority to CN201880007150.1A priority Critical patent/CN110192088B/en
Publication of WO2018155606A1 publication Critical patent/WO2018155606A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G65/00—Loading or unloading
    • B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
    • B65G65/34—Emptying devices
    • B65G65/40—Devices for emptying otherwise than from the top
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G13/00—Weighing apparatus with automatic feed or discharge for weighing-out batches of material

Definitions

  • the present invention relates to weighing technology.
  • a weighing device that supplies a weighing object (for example, cereals) stored in a storage tank to a weighing tank disposed below the weighing object and measures it with a load cell is known (for example, Patent Documents 1 to 5 listed below). 3).
  • a weighing device that supplies a weighing object (for example, cereals) stored in a storage tank to a weighing tank disposed below the weighing object and measures it with a load cell is known (for example, Patent Documents 1 to 5 listed below). 3).
  • the object to be weighed in the storage tank is supplied to the measurement tank by dropping by gravity when a supply gate arranged at the lower part of the storage tank is opened.
  • vibration is generated by an impact when a measurement object falls into the weighing tank. Since this vibration causes a decrease in measurement accuracy, measurement is usually performed by using a load cell after waiting until the vibration has subsided. However, if this waiting time is lengthened, the time required for one cycle of weighing becomes longer, and as a result, the processing capacity (for example, the processing amount per hour) of the weighing device is reduced. For this reason, it is desired to reduce the waiting time and improve the processing capacity of the weighing device.
  • the present invention has been made to solve at least a part of the above-described problems, and can be realized, for example, as the following modes.
  • a weighing device is provided.
  • This weighing device is a storage tank for storing an object to be measured, and is provided below the storage tank having an opening formed in the lower part, a supply gate for opening and closing the opening, and a storage tank.
  • the movement trajectory of the lower surface of the supply gate during the opening / closing operation of the supply gate is set so as to be positioned inside the measuring tank at least in a region immediately below the opening.
  • the supply gate is closed in a state where the supply gate is opened, and the measurement object in the storage tank and the measurement object stored in the measurement tank are continuous, Waiting from the closing operation of the supply gate to the weighing by the load cell while weighing by the load cell is suppressed while the weighing object is scraped by the supply gate and scattered outside the weighing tank when the supply gate is closed. Time can be reduced. Specifically, since the supply gate is closed in a state where the measurement object in the storage tank and the measurement object stored in the measurement tank are continuous, the measurement in the storage tank is performed before the supply gate is closed. The weighing tank is pressed down by the weight of the object.
  • the opening is arranged inside the measuring tank. According to such a form, it is possible to further suppress the measurement object from being scraped out by the supply gate and scattered outside the measurement tank when the supply gate is closed.
  • the supply gate when the weighing device is closed after the weighing object is supplied from the storage tank to the weighing tank, the supply gate;
  • a gap forming means is provided for forming a gap between the weighing object stored in the weighing tank. According to such a form, the measurement accuracy can be improved because the supply gate and the measurement object in the measurement tank do not contact at the time of measurement by the load cell.
  • the gap forming means projects downward from the lower surface of the lower surface of the supply gate toward the front end side in the traveling direction when the supply gate is closed. It is the protrusion part provided. According to such a form, when the supply gate performs the closing operation, the measurement object is scraped by the protrusion, so that the height of the protrusion is between the supply gate and the measurement object stored in the measurement tank. There is a gap for that. Therefore, the gap can be easily formed.
  • the supply gate is configured to pivot about a fulcrum.
  • the longitudinal section along the pivot direction of the lower surface of the supply gate has an arc shape.
  • the arc shape is set so that the radius on the front side in the traveling direction when the supply gate is closed is larger than the radius on the rear side.
  • the movement trajectory is such that the end of the movement trajectory on the front side in the traveling direction when the supply gate is closed is a storage tank It is set so as to be located on the inner side of the outer edge portion. According to such a form, it is possible to further suppress the measurement object from being scraped out by the supply gate and scattered outside the measurement tank when the supply gate is closed.
  • the weighing object scraped by the supply gate becomes a mountain near the outer edge of the storage tank, and a part of the mountain collapses. Intrusion into the gap can be suppressed.
  • the measuring device can detect whether or not a predetermined amount or more of the weighing object is stored in the storage tank.
  • a control unit that controls the operation of the weighing device.
  • the control unit controls the weighing device to open the supply gate and supply the measurement object from the storage tank to the measurement tank when a predetermined amount or more of the measurement object is stored in the storage tank.
  • a sufficient amount of the weighing object is stored in the storage tank so that the measurement object in the storage tank and the measurement object stored in the measurement tank are in a continuous state.
  • the supply gate can be closed. Therefore, the control intended in the first embodiment can be reliably performed.
  • the control unit when the measurement object of a predetermined amount or more is not stored in the storage tank, the control unit until the measurement object of a predetermined amount or more is stored. After waiting, the weighing device is controlled in the first operation mode in which the supply gate is opened and the weighing object is supplied from the storage tank to the weighing tank. According to such a form, the control intended in the first form can be reliably performed.
  • the control unit when the measurement object of a predetermined amount or more is not stored in the storage tank, the control unit until the measurement object of a predetermined amount or more is stored. Without waiting, the weighing device is controlled in the second operation mode in which the supply gate is opened to supply the weighing object from the storage tank to the weighing tank.
  • the time from the closing of the supply gate to the start of weighing is the time from the closing of the supply gate when controlling the weighing device in the second operation mode. It is set shorter than the time until.
  • the weighing object stored in the storage tank and the measurement object in the measurement tank are continuous as the second operation mode.
  • the supply gate Before entering the state, the supply gate can be closed. Therefore, it does not wait for an excessively long time until a measurement object of a predetermined amount or more is stored. As a result, the processing capacity of the weighing device can be improved.
  • the time from when the supply gate is closed to when the weighing is started is measured after the supply gate is closed when the weighing device is controlled in the first operation mode. Since it is longer than the time until the start of the vibration, a sufficient time for the vibration to converge can be secured.
  • a weighing device is provided.
  • This weighing device is a storage tank for storing an object to be measured, and is provided below the storage tank having an opening formed in the lower part, a supply gate for opening and closing the opening, and a storage tank.
  • any one of the second to ninth embodiments can be applied to the tenth embodiment.
  • a gate for use in a weighing device includes a gate body and a protruding portion protruding from one surface of the gate body. According to such a gate, the same effect as in the fourth embodiment can be obtained.
  • a gate for use in a weighing device includes a surface having an arc-shaped longitudinal section.
  • the arc shape is set such that the radius on one side along the arc shape is larger than the radius on the other side. According to such a gate, the same effect as in the fifth embodiment can be obtained.
  • a method for operating a weighing device prepares a weighing device including a storage tank having an opening in the lower part, a supply gate for opening and closing the opening, and a measurement tank provided below the storage tank and supported by a load cell.
  • a process a first step of opening a supply gate, and supplying a measurement object stored in the storage tank to the measurement tank through the opening; and a measurement object in the storage tank after the first process;
  • the process is provided. According to this mode, similarly to the first embodiment, the waiting time from when the supply gate is closed to when the weighing is performed can be reduced, and the processing capacity of the weighing device can be improved. Any one of the second to ninth embodiments can be applied to the thirteenth embodiment.
  • FIG. 1 is a cross-sectional view showing a schematic configuration of a weighing device 20 according to a first embodiment of the present invention.
  • the weighing device 20 is a device that measures the weight of cereals.
  • the metering device 20 can be used to meter any granular or powdered material.
  • the weighing device 20 includes a storage tank 30, a supply gate 40, a weighing tank 50, a load cell 52, a sensor 70, and a control unit 80.
  • the storage tank 30 is connected to a supply line (not shown) at the top thereof.
  • the measuring object 90 is supplied to the storage tank 30 continuously or intermittently from this supply line, and is temporarily stored in the storage tank 30.
  • the capacity of the storage tank 30 is set sufficiently larger (for example, 1.5 times or more) than the capacity of the measuring tank 50 described later.
  • An opening 31 is formed in the lower part of the storage tank 30.
  • the storage tank 30 is formed in the vicinity of the opening 31 so that the cross section gradually decreases toward the opening 31.
  • a supply gate 40 is provided in the vicinity of the opening 31 to open and close the opening 31.
  • the supply gate 40 is configured to pivot about a fulcrum.
  • the supply gate 40 is operated by an arbitrary actuator (for example, an air cylinder).
  • the supply gate 40 has an arc-shaped lower surface when viewed in a longitudinal section along the pivot direction.
  • a protrusion 41 is provided on the lower surface of the supply gate 40 so as to protrude downward from the lower surface.
  • the protruding portion 41 is provided on the lower surface of the supply gate 40 on the front end side in the traveling direction during the closing operation of the supply gate 40 (in this embodiment, the front end portion in the traveling direction). The role of the protrusion 41 will be described later.
  • the supply gate 40 has a constant radius, except for a portion where the protrusion 41 is provided, as viewed in a longitudinal section along the pivot direction.
  • the weighing tank 50 is open at the top and is provided below the storage tank 30. When viewed in the vertical direction, the storage tank 30 is disposed at the approximate center of the weighing tank 50.
  • the measuring tank 50 temporarily stores the measurement object 90 that is intermittently supplied from the storage tank 30 through the opening 31.
  • the opening 31 is disposed inside the measuring tank 50.
  • the weighing tank 50 is supported by a load cell 52.
  • the load cell 52 is attached to a main body frame 55 having sufficient rigidity. In the present embodiment, the weighing tank 50 is supported at one point by the load cell 52. However, the weighing tank 50 may be supported at two or more points.
  • a discharge port 51 is formed at the bottom of the weighing tank 50.
  • a discharge gate 60 for opening and closing the discharge port 51 is provided in the vicinity of the discharge port 51.
  • the weighing object 90 stored in the weighing tank 50 is weighed by the load cell 52 and then discharged to a subsequent facility (for example, a storage tank or a conveyor).
  • the sensor 70 is arranged on the upper part of the storage tank 30.
  • the sensor 70 is a level sensor for detecting whether or not a predetermined amount or more of the measurement object 90 is stored in the storage tank 30.
  • the control unit 80 includes a CPU and a memory, and controls the entire operation of the weighing device 20 by executing a program stored in the memory.
  • the movement trajectory of the lower surface of the supply gate 40 during the opening / closing operation of the supply gate 40 is set so as to be located inside the measurement tank 50 at least in a region immediately below the opening 31.
  • the movement locus 35 of the lower surface of the protrusion 41 formed on the supply gate 40 is shown as the locus of the lower surface of the supply gate 40.
  • 2 to 5 are schematic diagrams showing the operation of the weighing device 20. 2 to 5, the discharge gate 60 is not shown.
  • the controller 80 pivots the supply gate 40 in the direction of arrow A ⁇ b> 1 to open the supply gate 40.
  • the weighing object 90 in the storage tank 30 falls into the weighing tank 50 by gravity as indicated by an arrow A2.
  • the measuring tank 50 vibrates as indicated by an arrow A3.
  • the weighing device 20 has a function of converging this vibration at an early stage.
  • FIG. 4 shows a state where the supply of the measurement object 90 from the storage tank 30 to the measurement tank 50 is completed. Since the measurement object 90 is stored from the bottom surface of the measurement tank 50 to the lower end of the storage tank 30, the flow of the measurement object 90 from the storage tank 30 toward the measurement tank 50 is stopped. Supply gate 40 remains held in the open position. As described above, since the capacity of the storage tank 30 is larger than the capacity of the measuring tank 50, even if the measurement object 90 is intermittently supplied to the storage tank 30, Many weighing objects 90 remain. When the weighing object 90 is continuously supplied to the storage tank 30, a larger amount of the weighing object 90 remains.
  • the measurement object 90 in the storage tank 30 is in a state of being continuous with the measurement object 90 stored in the measurement tank 50.
  • this state is also referred to as a continuous state.
  • the storage tank 30 is arranged at the approximate center of the measuring tank 50 when viewed in the vertical direction. Is formed.
  • the weighing object 90 is placed on the outer edge of the weighing tank 50. It is hard to accumulate. For this reason, the space which is not filled with the measuring object 90 is formed comparatively large.
  • the control unit 80 pivots the supply gate 40 in the direction of arrow A5 as shown in FIG. 5 to close the supply gate 40.
  • the surface of the weighing object 90 is scraped by the protrusion 41 toward the front in the traveling direction of the supply gate 40.
  • a gap 53 is formed between the supply gate 40 and the weighing object 90 stored in the weighing tank 50. Therefore, since the supply gate 40 and the measurement object 90 in the measurement tank 50 do not come into contact with each other during the measurement by the load cell 52, the measurement accuracy can be improved.
  • the movement locus 35 is set so that the end of the movement locus 35 on the front side in the traveling direction when the supply gate 40 is closed is located on the inner side of the outer edge portion 54 of the measuring tank 50. For this reason, it is possible to further suppress the weighing object 90 from being scraped out by the supply gate 40 and scattered outside the weighing tank 50 when the supply gate 40 is closed. Further, the weighing object 90 scraped out by the supply gate 40 becomes a mountain near the outer edge portion 54 of the weighing tank 50, and a part of the mountain collapses to enter the gap 53 and suppress the gap 53 from being buried. it can.
  • the vibration is quickly converged as described with reference to FIG. 4, so that the measurement by the load cell 52 can be started with a short standby time or without a standby period. . Therefore, the time of one cycle of measurement is shortened by the amount of reduction in the standby time, and the processing capacity of the weighing device 20 can be improved.
  • FIG. 6 is a flowchart showing the flow of the first operation mode.
  • the first operation mode is started with the supply gate 40 closed.
  • the control unit 80 first determines whether or not a predetermined amount or more of the measurement object 90 is stored in the storage tank 30 (step S110). This determination is made using the detection result of the sensor 70.
  • the predetermined amount is set in advance so that the continuous state described in FIG. 4 can be realized when the supply gate 40 is opened.
  • step S110: No the control unit 80 waits until the measurement object 90 is stored in a predetermined amount or more.
  • step S110: No the control unit 80 opens the supply gate 40 and measures the amount in the storage tank 30 as shown in FIG. The object 90 is supplied to the weighing tank 50 (step S120).
  • step S120 the controller 80 closes the supply gate 40 as shown in FIG. 5 after the supply of the weighing object 90 is completed, that is, after the measurement object 90 is in a continuous state as shown in FIG. 4 (step S130). .
  • the determination of the completion of the supply of the weighing object 90 may be made, for example, based on whether a predetermined waiting time has elapsed.
  • the predetermined waiting time is set experimentally or empirically in advance according to the characteristics of the weighing object 90.
  • a level sensor for determining whether or not the measurement object 90 in the measurement tank 50 has reached the lower end of the storage tank 30 may be provided in the measurement tank 50.
  • step S140 the control unit 80 waits for a time T1 (step S140).
  • This time T1 is set shorter than the prior art in consideration of the above-described effect of closing the supply gate 40 in the continuous state.
  • this time T1 may be zero. That is, the standby may be omitted.
  • the control unit 80 When waiting for the time T1, the control unit 80 performs measurement using the load cell 52 (step S150). When the measurement is completed, the control unit 80 opens the discharge gate 60 and discharges the measurement object 90 in the measurement tank 50 (step S160). When the discharge is completed, the control unit 80 closes the discharge gate 60 (step S170). Thus, one cycle of the weighing operation in the first operation mode is completed. This cycle is repeated. According to the first operation mode, the operation of closing the supply gate 40 in the continuous state can be reliably executed.
  • FIG. 7 is a flowchart showing the flow of the second operation mode.
  • the same steps as those in the first operation mode are denoted by the same reference numerals as those in FIG.
  • the points different from the first operation mode will be mainly described, and the points not particularly described are the same as those in the first operation mode.
  • the control unit 80 first determines whether or not a predetermined amount or more of the measurement object 90 is stored in the storage tank 30. Judgment is made (step S110).
  • step S110: Yes when a predetermined amount or more of the measurement object 90 is stored (step S110: Yes), the control unit 80 executes steps S120 to S170 and ends one cycle of measurement.
  • step S110: No when the measurement object 90 is not stored more than a predetermined amount (step S110: No), the control unit 80 opens the supply gate 40 and puts the measurement object 90 in the storage tank 30 into the measurement tank 50. Supply (step S220). Then, when the supply of the weighing object 90 is completed, the control unit 80 closes the supply gate 40 (step S230). In this case, since the amount of the measurement object 90 stored in the storage tank 30 is small, the measurement object 90 in the storage tank 30 is not continuous with the measurement object 90 stored in the measurement tank 50. (Hereinafter also referred to as a discontinuous state), the supply gate 40 is closed. Further, the time until the supply of the weighing object 90 is completed is set shorter than that in step S130.
  • Time T2 is set longer than time T1. That is, here, since the amount of the measurement object 90 stored in the storage tank 30 is small, the supply gate 40 is closed in a discontinuous state. For this reason, the waiting time (time T2) until the vibration is converged is set longer than the time T1.
  • the control unit 80 executes steps S150 to S170 and ends one cycle of measurement. According to the second operation mode, when the storage amount of the measurement object 90 in the storage tank 30 is large, the standby time can be shortened by closing the supply gate 40 in a continuous state.
  • the measurement object 90 in the storage tank 30 when the storage amount of the measurement object 90 in the storage tank 30 is small, the measurement object 90 of a predetermined amount or more does not wait for an excessively long time until it is stored in the storage tank 30. For this reason, the processing capability of the weighing device 20 can be improved.
  • the above-described configuration is particularly advantageous when the weighing tank 50 is supported at one point by the load cell 52 as in the present embodiment, that is, when the vibration is difficult to converge. In other words, according to the configuration described above, it is possible to achieve both a simple support structure for the weighing tank 50 and an improvement in the processing capacity of the weighing device 20.
  • the first operation mode and the second operation mode described above may be selected by the control unit 80 based on a user instruction input via a user interface provided in the weighing device 20.
  • the first operation mode and the second operation mode may be automatically selected by the control unit 80 according to the supply amount of the weighing object 90 supplied to the storage tank 30.
  • the control unit 80 monitors the storage state of the weighing object 90 in the storage tank 30 using the sensor 70, and the time during which the storage amount equal to or greater than the predetermined amount is ensured exceeds a predetermined ratio within a predetermined period.
  • the first operation mode may be selected when occupied, and the second operation mode may be selected otherwise.
  • FIG. 8 is a side view showing the shape of the supply gate 340 of the weighing device according to the second embodiment of the present invention.
  • the supply gate 340 is configured to pivot about the fulcrum 343 as in the first embodiment.
  • the supply gate 340 has an arc-shaped lower surface when viewed in a longitudinal section along the pivot direction.
  • the radius R of the arc shape in the longitudinal section is not constant along the circumferential direction.
  • the radius R1 of the front end portion 341 when the supply gate 340 is closed is larger than the radius R2 of the rear end portion 342 when the supply gate 340 is closed.
  • the radius R gradually decreases from the radius R1 to the radius R2 along the circumferential direction. For this reason, the movement trajectory 335 of the end portion 341 is located radially outside the movement trajectory 336 of the end portion 342 when viewed from the fulcrum 343.
  • a gap 353 is formed between the supply gate 340 and the measurement object 90 by the closing operation of the supply gate 340.
  • the gap 353 can be formed only by devising the shape of the supply gate 340. Therefore, no special device or structure for forming the gap is required, and the number of parts can be reduced.
  • Such an effect is not limited to the shape illustrated in FIG. 8, and can be obtained when the radius on the front side in the traveling direction during the closing operation of the supply gate 340 is set to be larger than the radius on the rear side. More specifically, when the supply gate 340 is in the closed position, the radius of the supply gate 340 in the region immediately below the opening 31 is smaller than the radius on the front side in the traveling direction during the closing operation than the region. The effect is obtained.
  • FIG. 9 is a cross-sectional view showing a schematic configuration of a weighing device 420 according to the third embodiment of the present invention.
  • the weighing device 420 includes a storage tank 430, a supply gate 440, a weighing tank 450, and a load cell 52.
  • the supply gate 440 is a slide type in this embodiment, and opens and closes the opening 431 of the storage tank 430 by moving in the horizontal direction as indicated by an arrow A6.
  • a protrusion 441 that moves on the movement locus 435 when the supply gate 440 is closed is formed at the front end in the traveling direction when the supply gate 440 is closed.
  • the protruding portion 441 forms a gap 453 between the supply gate 440 and the measurement object 90 stored in the measurement tank 450 when the supply gate 440 is closed.
  • This configuration also has the same effect as the first embodiment.
  • the weighing tank 450 is optionally provided with a scattering prevention wall 456 for preventing the weighing object 90 scraped out by the supply gate 440 from scattering outside the weighing tank 50.
  • the gap forming unit may be a unit that blows air along the lower surface of the supply gates 40 and 440 after the supply gates 40 and 440 are closed.
  • the gap forming means may be an actuator that moves the storage tanks 30 and 430 upward after the supply gates 40 and 440 are closed.
  • the openings 31 and 431 may be arranged outside (that is, above) the measuring tanks 50 and 450.
  • the movement trajectory of the lower surfaces of the supply gates 40, 340, and 440 may be located outside (that is, above) the weighing tanks 50 and 450.
  • the measurement object 90 may be prevented from being scattered outside the measurement tank 50 by the scattering prevention wall 456.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Weight Measurement For Supplying Or Discharging Of Specified Amounts Of Material (AREA)

Abstract

The present invention relates to a weighing device, and the objective thereof is to improve the processing capability of the weighing device by reducing the standby time from when a supply gate is closed until weighing is performed. This weighing device is provided with: a storage tank for storing an object to be weighed, and in a lower portion of which an opening is formed; a supply gate for opening and closing the opening; and a weighing tank which is provided below the storage tank to store the object to be weighed that has been supplied from the storage tank through the opening, and which is supported on a load cell. A movement trajectory of a lower surface of the supply gate during an operation to open and close the supply gate is set in such a way as to be positioned inside the weighing tank in at least a region directly below the opening.

Description

計量装置、ゲートおよび計量装置の作動方法Weighing device, gate and method of operating weighing device
　本発明は、計量技術に関する。 The present invention relates to weighing technology.
　従来、貯留槽に貯留された計量対象物（例えば、穀類）を、その下方に配置された計量槽に供給し、ロードセルによって計量する計量装置が知られている（例えば、下記の特許文献１～３）。この種の計量装置では、貯留槽内の計量対象物は、貯留槽の下部に配置された供給ゲートを開けた際に重力によって落下することによって計量槽に供給される。 2. Description of the Related Art Conventionally, a weighing device that supplies a weighing object (for example, cereals) stored in a storage tank to a weighing tank disposed below the weighing object and measures it with a load cell is known (for example, Patent Documents 1 to 5 listed below). 3). In this type of weighing device, the object to be weighed in the storage tank is supplied to the measurement tank by dropping by gravity when a supply gate arranged at the lower part of the storage tank is opened.
特公平７－１１３５６８号公報Japanese Patent Publication No.7-113568 特開２００４－２７１３５０号公報JP 2004-271350 A 特許第３９１３１５６号公報Japanese Patent No. 3913156
　このような計量装置では、計量対象物が計量槽内に落下するときの衝撃によって振動が発生する。この振動は、計量精度の低下を招くので、通常、振動が収まるまで待機した後にロードセルによる計量が行われる。しかしながら、この待機時間が長くなると、計量の１サイクルに要する時間が長くなり、その結果、計量装置の処理能力（例えば、時間当たりの処理量）の低下を招くことになる。このようなことから、待機時間を低減し、計量装置の処理能力を向上させることが望まれる。 In such a weighing device, vibration is generated by an impact when a measurement object falls into the weighing tank. Since this vibration causes a decrease in measurement accuracy, measurement is usually performed by using a load cell after waiting until the vibration has subsided. However, if this waiting time is lengthened, the time required for one cycle of weighing becomes longer, and as a result, the processing capacity (for example, the processing amount per hour) of the weighing device is reduced. For this reason, it is desired to reduce the waiting time and improve the processing capacity of the weighing device.
　本発明は、上述の課題の少なくとも一部を解決するためになされたものであり、例えば、以下の形態として実現することが可能である。 The present invention has been made to solve at least a part of the above-described problems, and can be realized, for example, as the following modes.
　本発明の第１の形態によれば、計量装置が提供される。この計量装置は、計量対象物を貯留するための貯留槽であって、下部に開口が形成された貯留槽と、開口を開閉するための供給ゲートと、貯留槽よりも下方に設けられ、貯留槽から開口を介して供給された計量対象物を貯留するための計量槽であって、ロードセルに支持される計量槽と、を備えている。供給ゲートの開閉動作時における供給ゲートの下面の移動軌跡は、少なくとも開口の直下の領域において計量槽の内部に位置するように設定される。 According to the first aspect of the present invention, a weighing device is provided. This weighing device is a storage tank for storing an object to be measured, and is provided below the storage tank having an opening formed in the lower part, a supply gate for opening and closing the opening, and a storage tank. A measuring tank for storing a measuring object supplied from the tank through an opening, and a measuring tank supported by a load cell. The movement trajectory of the lower surface of the supply gate during the opening / closing operation of the supply gate is set so as to be positioned inside the measuring tank at least in a region immediately below the opening.
　かかる計量装置によれば、供給ゲートが開けられた状態、かつ、貯留槽内の計量対象物と計量槽内に貯留された計量対象物とが連続している状態で供給ゲートを閉じ、その後、ロードセルによる計量を行うことによって、供給ゲートの閉動作時に計量対象物が供給ゲートによって掻き出されて計量槽の外部に飛散することを抑制しつつ、供給ゲートの閉動作からロードセルによる計量までの待機時間を低減することができる。具体的には、貯留槽内の計量対象物と計量槽内に貯留された計量対象物とが連続している状態で供給ゲートを閉じるので、供給ゲートの閉動作前に、貯留槽内の計量対象物の重量によって、計量槽が押さえつけられる。その結果、貯留槽から計量槽に計量対象物が供給される際に生じる計量槽の振動を早期に収束させることができる。したがって、供給ゲートを閉じてから計量を行うまでの待機時間を低減し、計量装置の処理能力を向上させることができる。 According to such a weighing device, the supply gate is closed in a state where the supply gate is opened, and the measurement object in the storage tank and the measurement object stored in the measurement tank are continuous, Waiting from the closing operation of the supply gate to the weighing by the load cell while weighing by the load cell is suppressed while the weighing object is scraped by the supply gate and scattered outside the weighing tank when the supply gate is closed. Time can be reduced. Specifically, since the supply gate is closed in a state where the measurement object in the storage tank and the measurement object stored in the measurement tank are continuous, the measurement in the storage tank is performed before the supply gate is closed. The weighing tank is pressed down by the weight of the object. As a result, it is possible to quickly converge the vibration of the measuring tank that occurs when the measurement object is supplied from the storage tank to the measuring tank. Accordingly, it is possible to reduce the waiting time from when the supply gate is closed to when weighing is performed, and to improve the processing capacity of the weighing device.
　本発明の第２の形態によれば、第１の形態において、開口は、計量槽の内部に配置される。かかる形態によれば、供給ゲートの閉動作時に計量対象物が供給ゲートによって掻き出されて計量槽の外部に飛散することをいっそう抑制できる。 According to the second embodiment of the present invention, in the first embodiment, the opening is arranged inside the measuring tank. According to such a form, it is possible to further suppress the measurement object from being scraped out by the supply gate and scattered outside the measurement tank when the supply gate is closed.
　本発明の第３の形態によれば、第１または第２の形態において、計量装置は、貯留槽から計量槽に計量対象物が供給された後に供給ゲートが閉じたときに、供給ゲートと、計量槽に貯留された計量対象物と、の間に隙間を形成するための隙間形成手段を備えている。かかる形態によれば、ロードセルによる計量時に、供給ゲートと計量槽内の計量対象物とが接触することがないので、計量精度を向上できる。 According to the third aspect of the present invention, in the first or second aspect, when the weighing device is closed after the weighing object is supplied from the storage tank to the weighing tank, the supply gate; A gap forming means is provided for forming a gap between the weighing object stored in the weighing tank. According to such a form, the measurement accuracy can be improved because the supply gate and the measurement object in the measurement tank do not contact at the time of measurement by the load cell.
　本発明の第４の形態によれば、第３の形態において、隙間形成手段は、供給ゲートの下面の、供給ゲートの閉動作時における進行方向前方端側に、下面から下方に突出するように設けられた突出部である。かかる形態によれば、供給ゲートが閉動作を行うときに、突出部によって計量対象物が掻き出されるので、供給ゲートと、計量槽に貯留された計量対象物と、の間に突出部の高さ分の隙間ができる。したがって、上記隙間を容易に形成することができる。 According to the fourth aspect of the present invention, in the third aspect, the gap forming means projects downward from the lower surface of the lower surface of the supply gate toward the front end side in the traveling direction when the supply gate is closed. It is the protrusion part provided. According to such a form, when the supply gate performs the closing operation, the measurement object is scraped by the protrusion, so that the height of the protrusion is between the supply gate and the measurement object stored in the measurement tank. There is a gap for that. Therefore, the gap can be easily formed.
　本発明の第５の形態によれば、第１または第２の形態において、供給ゲートは、支点を中心に枢動するように構成される。供給ゲートの下面の、枢動方向に沿った縦断面は、円弧形状である。円弧形状は、供給ゲートの閉動作時の進行方向前方側の半径が後方側の半径よりも大きくなるように設定される。かかる形態によれば、供給ゲートが閉動作を行うときに、供給ゲートの進行方向前方側の部分によって計量対象物が掻き出されるので、半径の差分に応じた隙間が形成される。したがって、上記隙間を容易に形成することができる。しかも供給ゲートの形状を工夫するだけで隙間を形成できるので、隙間を形成するための特別な装置や構造が必要なく、部品点数を低減できる。 According to the fifth aspect of the present invention, in the first or second aspect, the supply gate is configured to pivot about a fulcrum. The longitudinal section along the pivot direction of the lower surface of the supply gate has an arc shape. The arc shape is set so that the radius on the front side in the traveling direction when the supply gate is closed is larger than the radius on the rear side. According to this configuration, when the supply gate performs the closing operation, the measurement object is scraped by the portion on the front side in the traveling direction of the supply gate, so that a gap corresponding to the difference in radius is formed. Therefore, the gap can be easily formed. In addition, since the gap can be formed simply by devising the shape of the supply gate, a special device or structure for forming the gap is not required, and the number of parts can be reduced.
　本発明の第６の形態によれば、第１ないし第５のいずれかの形態において、上記移動軌跡は、移動軌跡の、供給ゲートの閉動作時の進行方向前方側の端部が、貯留槽の外縁部よりも内側に位置するように設定される。かかる形態によれば、供給ゲートの閉動作時に計量対象物が供給ゲートによって掻き出されて計量槽の外部に飛散することをいっそう抑制できる。また、第６の形態を第３ないし第５の形態に適用する場合には、供給ゲートによって掻き出された計量対象物が貯留槽の外縁部付近で山になり、当該山の一部が崩れて上記隙間内に侵入し、隙間が埋まることを抑制できる。 According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the movement trajectory is such that the end of the movement trajectory on the front side in the traveling direction when the supply gate is closed is a storage tank It is set so as to be located on the inner side of the outer edge portion. According to such a form, it is possible to further suppress the measurement object from being scraped out by the supply gate and scattered outside the measurement tank when the supply gate is closed. When the sixth embodiment is applied to the third to fifth embodiments, the weighing object scraped by the supply gate becomes a mountain near the outer edge of the storage tank, and a part of the mountain collapses. Intrusion into the gap can be suppressed.
　本発明の第７の形態によれば、第１ないし第６のいずれかの形態において、測定装置は、所定量以上の計量対象物が貯留槽内に貯留されているか否かを検出可能なセンサと、計量装置の動作を制御する制御部と、を備えている。制御部は、貯留槽に所定量以上の計量対象物が貯留されているときに、供給ゲートを開けて貯留槽から計量槽に計量対象物を供給するように計量装置を制御する。かかる形態によれば、貯留槽内の計量対象物と計量槽内に貯留された計量対象物とが連続した状態になるのに十分な量の計量対象物が貯留槽に貯留されていることをセンサによって確認した後に、供給ゲートの閉動作を行うことができる。したがって、第１の形態において意図される制御を確実に実施することができる。 According to the seventh aspect of the present invention, in any one of the first to sixth aspects, the measuring device can detect whether or not a predetermined amount or more of the weighing object is stored in the storage tank. And a control unit that controls the operation of the weighing device. The control unit controls the weighing device to open the supply gate and supply the measurement object from the storage tank to the measurement tank when a predetermined amount or more of the measurement object is stored in the storage tank. According to this form, a sufficient amount of the weighing object is stored in the storage tank so that the measurement object in the storage tank and the measurement object stored in the measurement tank are in a continuous state. After confirmation by the sensor, the supply gate can be closed. Therefore, the control intended in the first embodiment can be reliably performed.
　本発明の第８の形態によれば、第７の形態において、制御部は、貯留槽に所定量以上の計量対象物が貯留されていない場合、所定量以上の計量対象物が貯留されるまで待機した後に、供給ゲートを開けて貯留槽から計量槽に計量対象物を供給する第１の動作モードで計量装置を制御する。かかる形態によれば、第１の形態において意図される制御を確実に実施することができる。 According to the eighth aspect of the present invention, in the seventh aspect, when the measurement object of a predetermined amount or more is not stored in the storage tank, the control unit until the measurement object of a predetermined amount or more is stored. After waiting, the weighing device is controlled in the first operation mode in which the supply gate is opened and the weighing object is supplied from the storage tank to the weighing tank. According to such a form, the control intended in the first form can be reliably performed.
　本発明の第９の形態によれば、第７の形態において、制御部は、貯留槽に所定量以上の計量対象物が貯留されていない場合、所定量以上の計量対象物が貯留されるまで待機することなく、供給ゲートを開けて貯留槽から計量槽に計量対象物を供給する第２の動作モードで計量装置を制御する。第１の動作モードで計量装置を制御する場合において供給ゲートを閉めてから計量を開始するまでの時間は、第２の動作モードで計量装置を制御する場合において供給ゲートを閉めてから計量を開始するまでの時間よりも短く設定される。かかる形態によれば、計量対象物の貯留槽への供給量が少ない場合に、第２の動作モードとして、貯留槽内に貯留された計量対象物と計量槽内の計量対象物とが連続する状態になる前に、供給ゲートの閉動作を行うことができる。したがって、所定量以上の計量対象物が貯留されるまで過度に長時間待機することがない。その結果、計量装置の処理能力を向上させることができる。また、第２の動作モードで計量装置を制御する場合において供給ゲートを閉めてから計量を開始するまでの時間は、第１の動作モードで計量装置を制御する場合において供給ゲートを閉めてから計量を開始するまでの時間よりも長いので、振動が収束する時間を十分に確保することができる。 According to the ninth aspect of the present invention, in the seventh aspect, when the measurement object of a predetermined amount or more is not stored in the storage tank, the control unit until the measurement object of a predetermined amount or more is stored. Without waiting, the weighing device is controlled in the second operation mode in which the supply gate is opened to supply the weighing object from the storage tank to the weighing tank. When controlling the weighing device in the first operation mode, the time from the closing of the supply gate to the start of weighing is the time from the closing of the supply gate when controlling the weighing device in the second operation mode. It is set shorter than the time until. According to this mode, when the supply amount of the weighing object to the storage tank is small, the weighing object stored in the storage tank and the measurement object in the measurement tank are continuous as the second operation mode. Before entering the state, the supply gate can be closed. Therefore, it does not wait for an excessively long time until a measurement object of a predetermined amount or more is stored. As a result, the processing capacity of the weighing device can be improved. In addition, when the weighing device is controlled in the second operation mode, the time from when the supply gate is closed to when the weighing is started is measured after the supply gate is closed when the weighing device is controlled in the first operation mode. Since it is longer than the time until the start of the vibration, a sufficient time for the vibration to converge can be secured.
　本発明の第１０の形態によれば、計量装置が提供される。この計量装置は、計量対象物を貯留するための貯留槽であって、下部に開口が形成された貯留槽と、開口を開閉するための供給ゲートと、貯留槽よりも下方に設けられ、貯留槽から開口を介して供給された計量対象物を貯留するための計量槽であって、ロードセルに支持される計量槽と、を備えている。計量装置は、供給ゲートが開けられた状態、かつ、貯留槽内の計量対象物と計量槽内に貯留された計量対象物とが連続している状態で供給ゲートを閉じ、その後、ロードセルによる計量を行うように構成される。かかる計量装置によれば、第１の実施形態と同様に、供給ゲートを閉じてから計量を行うまでの待機時間を低減し、計量装置の処理能力を向上させることができる。第１０の形態に第２ないし第９のいずれかの形態を適用することも可能である。 According to the tenth aspect of the present invention, a weighing device is provided. This weighing device is a storage tank for storing an object to be measured, and is provided below the storage tank having an opening formed in the lower part, a supply gate for opening and closing the opening, and a storage tank. A measuring tank for storing a measuring object supplied from the tank through an opening, and a measuring tank supported by a load cell. The weighing device closes the supply gate in a state where the supply gate is opened and the measurement object in the storage tank and the measurement object stored in the measurement tank are continuous. Configured to do. According to such a weighing device, as in the first embodiment, it is possible to reduce the waiting time from when the supply gate is closed to when the weighing is performed, and to improve the processing capability of the weighing device. Any one of the second to ninth embodiments can be applied to the tenth embodiment.
　本発明の第１１の形態によれば、計量装置に使用するためのゲートが提供される。このゲートは、ゲート本体と、ゲート本体の１つの面から突出した突出部と、を備えている。かかるゲートによれば、第４の形態と同様の効果を奏する。 According to the eleventh aspect of the present invention, a gate for use in a weighing device is provided. The gate includes a gate body and a protruding portion protruding from one surface of the gate body. According to such a gate, the same effect as in the fourth embodiment can be obtained.
　本発明の第１２の形態によれば、計量装置に使用するためのゲートが提供される。このゲートは、円弧形状の縦断面を有する面を備えている。円弧形状は、円弧形状に沿った一方側の半径が他方側の半径よりも大きくなるように設定される。かかるゲートによれば、第５の形態と同様の効果を奏する。 According to the twelfth aspect of the present invention, a gate for use in a weighing device is provided. The gate includes a surface having an arc-shaped longitudinal section. The arc shape is set such that the radius on one side along the arc shape is larger than the radius on the other side. According to such a gate, the same effect as in the fifth embodiment can be obtained.
　本発明の第１３の形態によれば、計量装置の作動方法が提供される。この方法は、下部に開口が形成された貯留槽と、開口を開閉するための供給ゲートと、貯留槽よりも下方に設けられ、ロードセルに支持される計量槽と、を備える計量装置を用意する工程と、供給ゲートを開けて、貯留槽に貯留された計量対象物を、開口を介して計量槽に供給する第１の工程と、第１の工程の後に、貯留槽内の計量対象物と計量槽内に貯留された計量対象物とが連続している状態で供給ゲートを閉じる第２の工程と、第２の工程の後に、ロードセルによって、計量槽内の計量対象物を計量する第３の工程と、を備えている。かかる形態によれば、第１の実施形態と同様に、供給ゲートを閉じてから計量を行うまでの待機時間を低減し、計量装置の処理能力を向上させることができる。第１３の形態に第２ないし第９のいずれかの形態を適用することも可能である。 According to the thirteenth aspect of the present invention, a method for operating a weighing device is provided. This method prepares a weighing device including a storage tank having an opening in the lower part, a supply gate for opening and closing the opening, and a measurement tank provided below the storage tank and supported by a load cell. A process, a first step of opening a supply gate, and supplying a measurement object stored in the storage tank to the measurement tank through the opening; and a measurement object in the storage tank after the first process; A second step of closing the supply gate in a state where the measurement object stored in the measurement tank is continuous, and a third step of measuring the measurement object in the measurement tank by the load cell after the second step. The process is provided. According to this mode, similarly to the first embodiment, the waiting time from when the supply gate is closed to when the weighing is performed can be reduced, and the processing capacity of the weighing device can be improved. Any one of the second to ninth embodiments can be applied to the thirteenth embodiment.
本発明の第１実施形態としての計量装置の概略構成を示す断面図である。It is sectional drawing which shows schematic structure of the weighing | measuring device as 1st Embodiment of this invention. 計量装置の動作を示す模式図である。It is a schematic diagram which shows operation | movement of a weighing | measuring apparatus. 計量装置の動作を示す模式図である。It is a schematic diagram which shows operation | movement of a weighing | measuring apparatus. 計量装置の動作を示す模式図である。It is a schematic diagram which shows operation | movement of a weighing | measuring apparatus. 計量装置の動作を示す模式図である。It is a schematic diagram which shows operation | movement of a weighing | measuring apparatus. 計量装置の第１の動作モードの流れを示すフローチャートである。It is a flowchart which shows the flow of the 1st operation mode of a weighing | measuring device. 計量装置の第２の動作モードの流れを示すフローチャートである。It is a flowchart which shows the flow of the 2nd operation mode of a weighing | measuring device. 第２実施形態による計量装置の供給ゲートの形状を示す側面図である。It is a side view which shows the shape of the supply gate of the weighing | measuring device by 2nd Embodiment. 第３実施形態による計量装置の概略構成を示す断面図である。It is sectional drawing which shows schematic structure of the weighing | measuring device by 3rd Embodiment.
　図１は、本発明の第１実施形態による計量装置２０の概略構成を示す断面図である。計量装置２０は、本実施形態では、穀類の重量を測定する装置である。ただし、計量装置２０は、任意の粒状または粉体状の物質を計量するために使用することができる。図示するように、計量装置２０は、貯留槽３０と供給ゲート４０と計量槽５０とロードセル５２とセンサ７０と制御部８０とを備えている。 FIG. 1 is a cross-sectional view showing a schematic configuration of a weighing device 20 according to a first embodiment of the present invention. In this embodiment, the weighing device 20 is a device that measures the weight of cereals. However, the metering device 20 can be used to meter any granular or powdered material. As illustrated, the weighing device 20 includes a storage tank 30, a supply gate 40, a weighing tank 50, a load cell 52, a sensor 70, and a control unit 80.
　貯留槽３０は、その上部において供給ライン（図示せず）に接続されている。計量対象物９０は、この供給ラインから連続的または間欠的に貯留槽３０に供給され、貯留槽３０内で一時的に貯留される。貯留槽３０の容量は、後述する計量槽５０の容量よりも十分に大きく（例えば、１．５倍以上に）設定されている。貯留槽３０の下部には、開口３１が形成されている。貯留槽３０は、開口３１の付近において、開口３１に向けて横断面が徐々に小さくなるように形成されている。開口３１の付近には、開口３１を開閉するために供給ゲート４０が設けられている。供給ゲート４０は、本実施形態では、支点を中心に枢動するように構成されている。供給ゲート４０は、任意のアクチュエータ（例えば、エアシリンダ）によって作動される。また、供給ゲート４０は、その枢動方向に沿った縦断面で見て、円弧形状の下面を有している。供給ゲート４０の下面には、当該下面から下方に突出するように突出部４１が設けられている。突出部４１は、供給ゲート４０の下面の、供給ゲート４０の閉動作時における進行方向前方端側（本実施形態では、進行方向前方端部）に設けられている。この突出部４１の役割については後述する。本実施形態では、供給ゲート４０は、その枢動方向に沿った縦断面で見て、突出部４１が設けられた箇所を除き、一定の半径を有している。 The storage tank 30 is connected to a supply line (not shown) at the top thereof. The measuring object 90 is supplied to the storage tank 30 continuously or intermittently from this supply line, and is temporarily stored in the storage tank 30. The capacity of the storage tank 30 is set sufficiently larger (for example, 1.5 times or more) than the capacity of the measuring tank 50 described later. An opening 31 is formed in the lower part of the storage tank 30. The storage tank 30 is formed in the vicinity of the opening 31 so that the cross section gradually decreases toward the opening 31. A supply gate 40 is provided in the vicinity of the opening 31 to open and close the opening 31. In this embodiment, the supply gate 40 is configured to pivot about a fulcrum. The supply gate 40 is operated by an arbitrary actuator (for example, an air cylinder). Further, the supply gate 40 has an arc-shaped lower surface when viewed in a longitudinal section along the pivot direction. A protrusion 41 is provided on the lower surface of the supply gate 40 so as to protrude downward from the lower surface. The protruding portion 41 is provided on the lower surface of the supply gate 40 on the front end side in the traveling direction during the closing operation of the supply gate 40 (in this embodiment, the front end portion in the traveling direction). The role of the protrusion 41 will be described later. In the present embodiment, the supply gate 40 has a constant radius, except for a portion where the protrusion 41 is provided, as viewed in a longitudinal section along the pivot direction.
　計量槽５０は、上方が開放されており、貯留槽３０よりも下方に設けられている。鉛直方向に見て、貯留槽３０は、計量槽５０の略中央に配置されている。計量槽５０は、貯留槽３０から開口３１を介して間欠的に供給される計量対象物９０を一時的に貯留する。開口３１は、計量槽５０の内部に配置されている。この計量槽５０は、ロードセル５２によって支持されている。ロードセル５２は、十分な剛性を有する本体フレーム５５に取り付けられている。本実施形態では、計量槽５０は、ロードセル５２によって一点支持されている。ただし、計量槽５０は、二点以上で支持されていてもよい。 The weighing tank 50 is open at the top and is provided below the storage tank 30. When viewed in the vertical direction, the storage tank 30 is disposed at the approximate center of the weighing tank 50. The measuring tank 50 temporarily stores the measurement object 90 that is intermittently supplied from the storage tank 30 through the opening 31. The opening 31 is disposed inside the measuring tank 50. The weighing tank 50 is supported by a load cell 52. The load cell 52 is attached to a main body frame 55 having sufficient rigidity. In the present embodiment, the weighing tank 50 is supported at one point by the load cell 52. However, the weighing tank 50 may be supported at two or more points.
　計量槽５０の下部には、排出口５１が形成されている。また、排出口５１の付近には、排出口５１を開閉するための排出ゲート６０が設けられている。計量槽５０に貯留された計量対象物９０は、ロードセル５２によって計量された後、後段の設備（例えば、貯留槽、コンベアなど）に排出される。 A discharge port 51 is formed at the bottom of the weighing tank 50. A discharge gate 60 for opening and closing the discharge port 51 is provided in the vicinity of the discharge port 51. The weighing object 90 stored in the weighing tank 50 is weighed by the load cell 52 and then discharged to a subsequent facility (for example, a storage tank or a conveyor).
　センサ７０は、貯留槽３０の上部に配置されている。センサ７０は、貯留槽３０に所定量以上の計量対象物９０が貯留されているか否かを検出するためのレベルセンサである。制御部８０は、ＣＰＵおよびメモリを備えており、メモリに格納されたプログラムを実行することによって計量装置２０の動作全体を制御する。 The sensor 70 is arranged on the upper part of the storage tank 30. The sensor 70 is a level sensor for detecting whether or not a predetermined amount or more of the measurement object 90 is stored in the storage tank 30. The control unit 80 includes a CPU and a memory, and controls the entire operation of the weighing device 20 by executing a program stored in the memory.
　かかる計量装置２０において、供給ゲート４０の開閉動作時における供給ゲート４０の下面の移動軌跡は、少なくとも開口３１の直下の領域において計量槽５０の内部に位置するように設定されている。図１では、供給ゲート４０の下面の軌跡として、供給ゲート４０に形成された突出部４１の下面の移動軌跡３５を示している。 In such a weighing device 20, the movement trajectory of the lower surface of the supply gate 40 during the opening / closing operation of the supply gate 40 is set so as to be located inside the measurement tank 50 at least in a region immediately below the opening 31. In FIG. 1, the movement locus 35 of the lower surface of the protrusion 41 formed on the supply gate 40 is shown as the locus of the lower surface of the supply gate 40.
　以下、計量装置２０の計量動作について説明する。図２ないし図５は、計量装置２０の動作を示す模式図である。図２ないし図５において、排出ゲート６０は図示を省略されている。計量装置２０を用いて計量を行う場合、まず、図２に示すように、供給ゲート４０が閉位置にある状態で、貯留槽３０に計量対象物９０が貯留される。次いで、図３に示すように、制御部８０は、供給ゲート４０を矢印Ａ１の方向に枢動させて、供給ゲート４０を開ける。これによって、貯留槽３０内の計量対象物９０は、矢印Ａ２で示すように、重力によって計量槽５０内に落下する。このとき、計量対象物９０は、計量槽５０の底面に衝突するので、計量槽５０は、矢印Ａ３で示すように振動する。計量装置２０は、この振動を早期に収束させる機能を有している。 Hereinafter, the weighing operation of the weighing device 20 will be described. 2 to 5 are schematic diagrams showing the operation of the weighing device 20. 2 to 5, the discharge gate 60 is not shown. When weighing is performed using the weighing device 20, first, as illustrated in FIG. 2, the weighing object 90 is stored in the storage tank 30 in a state where the supply gate 40 is in the closed position. Next, as shown in FIG. 3, the controller 80 pivots the supply gate 40 in the direction of arrow A <b> 1 to open the supply gate 40. As a result, the weighing object 90 in the storage tank 30 falls into the weighing tank 50 by gravity as indicated by an arrow A2. At this time, since the measuring object 90 collides with the bottom surface of the measuring tank 50, the measuring tank 50 vibrates as indicated by an arrow A3. The weighing device 20 has a function of converging this vibration at an early stage.
　図４は、貯留槽３０から計量槽５０への計量対象物９０の供給が終了した状態を示している。計量槽５０の底面から貯留槽３０の下端まで計量対象物９０が貯留されたことにより、貯留槽３０から計量槽５０へ向かう計量対象物９０の流れは停止されている。供給ゲート４０は開位置に保持されたままである。上述したように、貯留槽３０の容量は、計量槽５０の容量よりも大きいので、貯留槽３０に計量対象物９０が間欠的に供給される場合であっても、貯留槽３０内には、多くの計量対象物９０が残留している。貯留槽３０に計量対象物９０が連続的に供給される場合は、さらに多くの計量対象物９０が残留することになる。この状態では、貯留槽３０の開口３１の直下の領域では、貯留槽３０内の計量対象物９０は、計量槽５０内に貯留された計量対象物９０と連続した状態になっている。以下、この状態を連続状態とも呼ぶ。一方、上述したように、貯留槽３０は、鉛直方向に見て計量槽５０の略中央に配置されているので、計量槽５０の外縁部には、計量対象物９０が充填されていない空間が形成されている。特に、本実施形態では、上述したように、貯留槽３０は、開口３１に向けて断面が徐々に小さくなるように形成されているので、計量対象物９０は、計量槽５０の外縁部には貯まりにくい。このため、計量対象物９０が充填されていない空間は比較的大きく形成されている。 FIG. 4 shows a state where the supply of the measurement object 90 from the storage tank 30 to the measurement tank 50 is completed. Since the measurement object 90 is stored from the bottom surface of the measurement tank 50 to the lower end of the storage tank 30, the flow of the measurement object 90 from the storage tank 30 toward the measurement tank 50 is stopped. Supply gate 40 remains held in the open position. As described above, since the capacity of the storage tank 30 is larger than the capacity of the measuring tank 50, even if the measurement object 90 is intermittently supplied to the storage tank 30, Many weighing objects 90 remain. When the weighing object 90 is continuously supplied to the storage tank 30, a larger amount of the weighing object 90 remains. In this state, in the region immediately below the opening 31 of the storage tank 30, the measurement object 90 in the storage tank 30 is in a state of being continuous with the measurement object 90 stored in the measurement tank 50. Hereinafter, this state is also referred to as a continuous state. On the other hand, as described above, the storage tank 30 is arranged at the approximate center of the measuring tank 50 when viewed in the vertical direction. Is formed. In particular, in the present embodiment, as described above, since the storage tank 30 is formed so that the cross section gradually decreases toward the opening 31, the weighing object 90 is placed on the outer edge of the weighing tank 50. It is hard to accumulate. For this reason, the space which is not filled with the measuring object 90 is formed comparatively large.
　図４に示した状態では、貯留槽３０内に残留している計量対象物９０の重量によって、計量槽５０が下方に向けて押さえつけられる。これによって、図３に矢印Ａ３で示した振動が早期に収束される。 In the state shown in FIG. 4, the weighing tank 50 is pressed downward by the weight of the weighing object 90 remaining in the storage tank 30. As a result, the vibration indicated by the arrow A3 in FIG.
　振動が収束するまで待機した後、制御部８０は、図５に示すように、供給ゲート４０を矢印Ａ５の方向に枢動させて、供給ゲート４０を閉じる。このとき、計量対象物９０の表面は、突出部４１によって、供給ゲート４０の進行方向前方に向けて掻き出される。その結果、供給ゲート４０と、計量槽５０に貯留された計量対象物９０と、の間には、隙間５３が形成される。したがって、ロードセル５２による計量時に、供給ゲート４０と計量槽５０内の計量対象物９０とが接触することがないので、計量精度を向上できる。 After waiting until the vibration converges, the control unit 80 pivots the supply gate 40 in the direction of arrow A5 as shown in FIG. 5 to close the supply gate 40. At this time, the surface of the weighing object 90 is scraped by the protrusion 41 toward the front in the traveling direction of the supply gate 40. As a result, a gap 53 is formed between the supply gate 40 and the weighing object 90 stored in the weighing tank 50. Therefore, since the supply gate 40 and the measurement object 90 in the measurement tank 50 do not come into contact with each other during the measurement by the load cell 52, the measurement accuracy can be improved.
　また、移動軌跡３５は、当該移動軌跡３５の、供給ゲート４０の閉動作時の進行方向前方側の端部が、計量槽５０の外縁部５４よりも内側に位置するように設定されている。このため、供給ゲート４０の閉動作時に計量対象物９０が供給ゲート４０によって掻き出されて計量槽５０の外部に飛散することをいっそう抑制できる。また、供給ゲート４０によって掻き出された計量対象物９０が計量槽５０の外縁部５４付近で山になり、当該山の一部が崩れて隙間５３内に侵入し、隙間５３が埋まることを抑制できる。 Further, the movement locus 35 is set so that the end of the movement locus 35 on the front side in the traveling direction when the supply gate 40 is closed is located on the inner side of the outer edge portion 54 of the measuring tank 50. For this reason, it is possible to further suppress the weighing object 90 from being scraped out by the supply gate 40 and scattered outside the weighing tank 50 when the supply gate 40 is closed. Further, the weighing object 90 scraped out by the supply gate 40 becomes a mountain near the outer edge portion 54 of the weighing tank 50, and a part of the mountain collapses to enter the gap 53 and suppress the gap 53 from being buried. it can.
　こうして、供給ゲート４０の閉動作が完了すると、図４で説明したように振動が早期に収束されるので、短い待機時間で、あるいは、待機期間なしで、ロードセル５２による計量を開始することができる。したがって、待機時間が短縮された分だけ、計量の１サイクルの時間が短くなり、計量装置２０の処理能力を向上させることができる。 Thus, when the closing operation of the supply gate 40 is completed, the vibration is quickly converged as described with reference to FIG. 4, so that the measurement by the load cell 52 can be started with a short standby time or without a standby period. . Therefore, the time of one cycle of measurement is shortened by the amount of reduction in the standby time, and the processing capacity of the weighing device 20 can be improved.
　上述した計量装置２０において、制御部８０は、以下に説明するように、第１の動作モードおよび第２の動作モードのうちのいずれかの動作モードを選択して、計量装置２０を制御してもよい。図６は、第１の動作モードの流れを示すフローチャートである。第１の動作モードは、供給ゲート４０が閉じた状態で開始される。第１の動作モードが開始されると、図示するように、制御部８０は、まず、貯留槽３０に所定量以上の計量対象物９０が貯留されているか否かを判断する（ステップＳ１１０）。この判断は、センサ７０による検出結果を用いて行われる。所定量は、供給ゲート４０を開けたときに図４で説明した連続状態を実現可能となるように予め設定される。 In the weighing device 20 described above, the control unit 80 controls the weighing device 20 by selecting one of the first operation mode and the second operation mode as described below. Also good. FIG. 6 is a flowchart showing the flow of the first operation mode. The first operation mode is started with the supply gate 40 closed. When the first operation mode is started, as illustrated, the control unit 80 first determines whether or not a predetermined amount or more of the measurement object 90 is stored in the storage tank 30 (step S110). This determination is made using the detection result of the sensor 70. The predetermined amount is set in advance so that the continuous state described in FIG. 4 can be realized when the supply gate 40 is opened.
　判断の結果、計量対象物９０が所定量以上貯留されていない場合には、制御部８０は、計量対象物９０が所定量以上貯留されるまで待機する（ステップＳ１１０：Ｎｏ）。一方、計量対象物９０が所定量以上貯留されている場合には（ステップＳ１１０：Ｙｅｓ）、制御部８０は、図３に示したように、供給ゲート４０を開けて、貯留槽３０内の計量対象物９０を計量槽５０に供給する（ステップＳ１２０）。次いで、制御部８０は、計量対象物９０の供給が完了した後、すなわち、図４に示したように連続状態になった後、図５に示したように供給ゲート４０を閉める（ステップＳ１３０）。計量対象物９０の供給の完了の判断は、例えば、所定の待機時間を経過したか否かによって行われてもよい。所定の待機時間は、計量対象物９０の特性に応じて、実験的、または、経験的に予め設定される。あるいは、計量槽５０内の計量対象物９０が貯留槽３０の下端まで達しているか否かを判断するためのレベルセンサが計量槽５０内に設けられていてもよい。 As a result of the determination, if the measurement object 90 is not stored in a predetermined amount or more, the control unit 80 waits until the measurement object 90 is stored in a predetermined amount or more (step S110: No). On the other hand, when the measurement target 90 is stored in a predetermined amount or more (step S110: Yes), the control unit 80 opens the supply gate 40 and measures the amount in the storage tank 30 as shown in FIG. The object 90 is supplied to the weighing tank 50 (step S120). Next, the controller 80 closes the supply gate 40 as shown in FIG. 5 after the supply of the weighing object 90 is completed, that is, after the measurement object 90 is in a continuous state as shown in FIG. 4 (step S130). . The determination of the completion of the supply of the weighing object 90 may be made, for example, based on whether a predetermined waiting time has elapsed. The predetermined waiting time is set experimentally or empirically in advance according to the characteristics of the weighing object 90. Alternatively, a level sensor for determining whether or not the measurement object 90 in the measurement tank 50 has reached the lower end of the storage tank 30 may be provided in the measurement tank 50.
　次いで、供給ゲート４０が閉じられると、制御部８０は、時間Ｔ１だけ待機する（ステップＳ１４０）。この時間Ｔ１は、連続状態において供給ゲート４０の閉動作を行う上述の効果を考慮して、従来技術よりも短く設定されている。計量対象物９０の特性および計量装置２０の諸元によっては、この時間Ｔ１は、ゼロであってもよい。つまり、待機が省略されてもよい。 Next, when the supply gate 40 is closed, the control unit 80 waits for a time T1 (step S140). This time T1 is set shorter than the prior art in consideration of the above-described effect of closing the supply gate 40 in the continuous state. Depending on the characteristics of the weighing object 90 and the specifications of the weighing device 20, this time T1 may be zero. That is, the standby may be omitted.
　時間Ｔ１だけ待機すると、制御部８０は、ロードセル５２によって計量を行う（ステップＳ１５０）。計量が完了すると、制御部８０は、排出ゲート６０を開けて、計量槽５０内の計量対象物９０を排出する（ステップＳ１６０）。そして、排出が完了すると、制御部８０は、排出ゲート６０を閉める（ステップＳ１７０）。こうして、第１の動作モードによる１サイクルの計量動作が完了する。このサイクルは、繰り返し実施される。かかる第１動作モードによれば、連続状態において供給ゲート４０を閉じる動作を確実に実行することができる。 When waiting for the time T1, the control unit 80 performs measurement using the load cell 52 (step S150). When the measurement is completed, the control unit 80 opens the discharge gate 60 and discharges the measurement object 90 in the measurement tank 50 (step S160). When the discharge is completed, the control unit 80 closes the discharge gate 60 (step S170). Thus, one cycle of the weighing operation in the first operation mode is completed. This cycle is repeated. According to the first operation mode, the operation of closing the supply gate 40 in the continuous state can be reliably executed.
　図７は、第２の動作モードの流れを示すフローチャートである。図７において、第１の動作モードと同一の工程については、図６と同一の符号を付している。以下、第１の動作モードと異なる点を主に説明し、特に断らない点については、第１動作モードと同様である。第１の動作モードは、第２の動作モードが開始されると、図示するように、制御部８０は、まず、貯留槽３０に所定量以上の計量対象物９０が貯留されているか否かを判断する（ステップＳ１１０）。 FIG. 7 is a flowchart showing the flow of the second operation mode. In FIG. 7, the same steps as those in the first operation mode are denoted by the same reference numerals as those in FIG. Hereinafter, the points different from the first operation mode will be mainly described, and the points not particularly described are the same as those in the first operation mode. In the first operation mode, when the second operation mode is started, as shown in the figure, the control unit 80 first determines whether or not a predetermined amount or more of the measurement object 90 is stored in the storage tank 30. Judgment is made (step S110).
　判断の結果、計量対象物９０が所定量以上貯留されている場合には（ステップＳ１１０：Ｙｅｓ）、制御部８０は、ステップＳ１２０～Ｓ１７０を実行し、計量の１サイクルを終了させる。一方、計量対象物９０が所定量以上貯留されていない場合には（ステップＳ１１０：Ｎｏ）、制御部８０は、供給ゲート４０を開けて、貯留槽３０内の計量対象物９０を計量槽５０に供給する（ステップＳ２２０）。そして、計量対象物９０の供給が完了すると、制御部８０は、供給ゲート４０を閉める（ステップＳ２３０）。この場合、貯留槽３０内に貯留されている計量対象物９０の量が少ないので、貯留槽３０内の計量対象物９０が計量槽５０内に貯留された計量対象物９０と連続していない状態（以下、非連続状態とも呼ぶ）で、供給ゲート４０が閉められる。また、計量対象物９０の供給の完了までの時間は、ステップＳ１３０よりも短く設定される。 As a result of the determination, when a predetermined amount or more of the measurement object 90 is stored (step S110: Yes), the control unit 80 executes steps S120 to S170 and ends one cycle of measurement. On the other hand, when the measurement object 90 is not stored more than a predetermined amount (step S110: No), the control unit 80 opens the supply gate 40 and puts the measurement object 90 in the storage tank 30 into the measurement tank 50. Supply (step S220). Then, when the supply of the weighing object 90 is completed, the control unit 80 closes the supply gate 40 (step S230). In this case, since the amount of the measurement object 90 stored in the storage tank 30 is small, the measurement object 90 in the storage tank 30 is not continuous with the measurement object 90 stored in the measurement tank 50. (Hereinafter also referred to as a discontinuous state), the supply gate 40 is closed. Further, the time until the supply of the weighing object 90 is completed is set shorter than that in step S130.
　次いで、供給ゲート４０が閉じられると、制御部８０は、時間Ｔ２だけ待機する（ステップＳ２４０）。時間Ｔ２は、時間Ｔ１よりも長く設定されている。つまり、ここでは、貯留槽３０内に貯留されている計量対象物９０の量が少ないので、非連続状態において供給ゲート４０が閉じられる。このため、振動を収束するまでの待機時間（時間Ｔ２）は、時間Ｔ１よりも長く設定されている。時間Ｔ２だけ待機すると、制御部８０は、ステップＳ１５０～Ｓ１７０を実行し、計量の１サイクルを終了させる。かかる第２動作モードによれば、貯留槽３０内の計量対象物９０の貯留量が多い場合には、連続状態において供給ゲート４０を閉じることによって待機時間を短縮することができる。また、貯留槽３０内の計量対象物９０の貯留量が少ない場合には、所定量以上の計量対象物９０が貯留槽３０内に貯留されるまで過度に長時間待機することがない。このため、計量装置２０の処理能力を向上させることができる。上述した構成は、本実施形態のように計量槽５０がロードセル５２によって一点支持される場合、すなわち、振動が収束しにくい構成の場合に、特に有利である。換言すれば、上述した構成によれば、計量槽５０の簡略的な支持構造と、計量装置２０の処理能力の向上と、を両立させることができる。 Next, when the supply gate 40 is closed, the control unit 80 waits for a time T2 (step S240). Time T2 is set longer than time T1. That is, here, since the amount of the measurement object 90 stored in the storage tank 30 is small, the supply gate 40 is closed in a discontinuous state. For this reason, the waiting time (time T2) until the vibration is converged is set longer than the time T1. When waiting for the time T2, the control unit 80 executes steps S150 to S170 and ends one cycle of measurement. According to the second operation mode, when the storage amount of the measurement object 90 in the storage tank 30 is large, the standby time can be shortened by closing the supply gate 40 in a continuous state. Further, when the storage amount of the measurement object 90 in the storage tank 30 is small, the measurement object 90 of a predetermined amount or more does not wait for an excessively long time until it is stored in the storage tank 30. For this reason, the processing capability of the weighing device 20 can be improved. The above-described configuration is particularly advantageous when the weighing tank 50 is supported at one point by the load cell 52 as in the present embodiment, that is, when the vibration is difficult to converge. In other words, according to the configuration described above, it is possible to achieve both a simple support structure for the weighing tank 50 and an improvement in the processing capacity of the weighing device 20.
　上述した第１の動作モードおよび第２の動作モードは、計量装置２０が備えるユーザインタフェースを介して入力されるユーザ指示に基づいて、制御部８０が選択してもよい。あるいは、第１の動作モードおよび第２の動作モードは、貯留槽３０に供給される計量対象物９０の供給量に応じて、制御部８０が自動的に選択してもよい。例えば、制御部８０は、センサ７０を用いて貯留槽３０への計量対象物９０の貯留状況をモニタリングし、上記の所定量以上の貯留量が確保された時間が所定期間内において所定割合以上を占める場合に第１の動作モードを選択し、そうでない場合に第２の動作モードを選択してもよい。 The first operation mode and the second operation mode described above may be selected by the control unit 80 based on a user instruction input via a user interface provided in the weighing device 20. Alternatively, the first operation mode and the second operation mode may be automatically selected by the control unit 80 according to the supply amount of the weighing object 90 supplied to the storage tank 30. For example, the control unit 80 monitors the storage state of the weighing object 90 in the storage tank 30 using the sensor 70, and the time during which the storage amount equal to or greater than the predetermined amount is ensured exceeds a predetermined ratio within a predetermined period. The first operation mode may be selected when occupied, and the second operation mode may be selected otherwise.
　図８は、本発明の第２実施形態による計量装置の供給ゲート３４０の形状を示す側面図である。供給ゲート３４０は、第１実施形態と同様に、支点３４３を中心に枢動するように構成されている。供給ゲート３４０は、その枢動方向に沿った縦断面で見て、円弧形状の下面を有している。本実施形態では、当該縦断面における円弧形状の半径Ｒは、周方向に沿って一定ではない。具体的には、供給ゲート３４０の閉動作時の進行方向前方の端部３４１の半径Ｒ１は、閉動作時の進行方向後方の端部３４２の半径Ｒ２よりも大きい。また、端部３４１から端部３４２に至るまで、半径Ｒは、周方向に沿って、半径Ｒ１から半径Ｒ２まで徐々に小さくなっている。このため、端部３４１の移動軌跡３３５は、端部３４２の移動軌跡３３６よりも、支点３４３から見て径方向外側に位置する。 FIG. 8 is a side view showing the shape of the supply gate 340 of the weighing device according to the second embodiment of the present invention. The supply gate 340 is configured to pivot about the fulcrum 343 as in the first embodiment. The supply gate 340 has an arc-shaped lower surface when viewed in a longitudinal section along the pivot direction. In the present embodiment, the radius R of the arc shape in the longitudinal section is not constant along the circumferential direction. Specifically, the radius R1 of the front end portion 341 when the supply gate 340 is closed is larger than the radius R2 of the rear end portion 342 when the supply gate 340 is closed. Further, from the end 341 to the end 342, the radius R gradually decreases from the radius R1 to the radius R2 along the circumferential direction. For this reason, the movement trajectory 335 of the end portion 341 is located radially outside the movement trajectory 336 of the end portion 342 when viewed from the fulcrum 343.
　したがって、供給ゲート３４０の閉動作によって、供給ゲート３４０と計量対象物９０との間には、隙間３５３が形成される。かかる構成によれば、供給ゲート３４０の形状を工夫するだけで、隙間３５３を形成することができる。したがって、隙間を形成するための特別な装置や構造が必要なく、部品点数を低減できる。かかる効果は、図８に例示した形状に限らず、供給ゲート３４０の閉動作時の進行方向前方側の半径が後方側の半径よりも大きくなるように設定されている場合に得られる。より詳細には、供給ゲート３４０が閉位置にある場合において、開口３１の直下の領域における供給ゲート３４０の半径が、当該領域よりも閉動作時の進行方向前方側の半径よりも小さい場合に上記の効果が得られる。 Therefore, a gap 353 is formed between the supply gate 340 and the measurement object 90 by the closing operation of the supply gate 340. According to this configuration, the gap 353 can be formed only by devising the shape of the supply gate 340. Therefore, no special device or structure for forming the gap is required, and the number of parts can be reduced. Such an effect is not limited to the shape illustrated in FIG. 8, and can be obtained when the radius on the front side in the traveling direction during the closing operation of the supply gate 340 is set to be larger than the radius on the rear side. More specifically, when the supply gate 340 is in the closed position, the radius of the supply gate 340 in the region immediately below the opening 31 is smaller than the radius on the front side in the traveling direction during the closing operation than the region. The effect is obtained.
　図９は、本発明の第３実施形態による計量装置４２０の概略構成を示す断面図である。以下、計量装置４２０について、第１実施例と異なる点を主に説明し、特に断らない点については、第１実施形態と同様である。計量装置４２０は、貯留槽４３０と供給ゲート４４０と計量槽４５０とロードセル５２とを備えている。供給ゲート４４０は、本実施形態ではスライド式であり、矢印Ａ６で示すように水平方向に移動することによって、貯留槽４３０の開口４３１を開閉する。供給ゲート４４０の閉動作時における進行方向前方端には、供給ゲート４４０の閉動作時に、移動軌跡４３５上を移動する突出部４４１が形成されている。突出部４４１は、供給ゲート４４０が閉じられたときに、供給ゲート４４０と計量槽４５０内に貯留された計量対象物９０との間に隙間４５３を形成する。かかる構成によっても、第１実施形態と同様の効果を奏する。また、計量槽４５０には、オプションとして、供給ゲート４４０によって掻き出された計量対象物９０が計量槽５０の外部に飛散することを防止するための飛散防止壁４５６が設けられている。 FIG. 9 is a cross-sectional view showing a schematic configuration of a weighing device 420 according to the third embodiment of the present invention. Hereinafter, the weighing device 420 will be described mainly with respect to differences from the first embodiment, and the points not particularly described are the same as those of the first embodiment. The weighing device 420 includes a storage tank 430, a supply gate 440, a weighing tank 450, and a load cell 52. The supply gate 440 is a slide type in this embodiment, and opens and closes the opening 431 of the storage tank 430 by moving in the horizontal direction as indicated by an arrow A6. A protrusion 441 that moves on the movement locus 435 when the supply gate 440 is closed is formed at the front end in the traveling direction when the supply gate 440 is closed. The protruding portion 441 forms a gap 453 between the supply gate 440 and the measurement object 90 stored in the measurement tank 450 when the supply gate 440 is closed. This configuration also has the same effect as the first embodiment. The weighing tank 450 is optionally provided with a scattering prevention wall 456 for preventing the weighing object 90 scraped out by the supply gate 440 from scattering outside the weighing tank 50.
　以上、本発明のいくつかの実施形態について説明してきたが、上記した発明の実施形態は、本発明の理解を容易にするためのものであり、本発明を限定するものではない。本発明は、その趣旨を逸脱することなく、変更、改良され得るとともに、本発明にはその均等物が含まれる。また、上述した課題の少なくとも一部を解決できる範囲、または、効果の少なくとも一部を奏する範囲において、特許請求の範囲および明細書に記載された各構成要素の組み合わせ、または、省略が可能である。 Although several embodiments of the present invention have been described above, the above-described embodiments of the present invention are intended to facilitate understanding of the present invention and are not intended to limit the present invention. The present invention can be changed and improved without departing from the spirit thereof, and the present invention includes equivalents thereof. Moreover, in the range which can solve at least one part of the subject mentioned above, or the range which exhibits at least one part of an effect, the combination of each component described in the claim and the specification, or omission is possible. .
　例えば、隙間５３，４５３を形成するための隙間形成手段として、突出部４１，４４１に代えて、任意の手段を使用することができる。例えば、隙間形成手段は、供給ゲート４０，４４０を閉じた後に供給ゲート４０，４４０の下面に沿ってエアを吹き込む手段であってもよい。あるいは、隙間形成手段は、供給ゲート４０，４４０を閉じた後に貯留槽３０，４３０を上方に移動させるアクチュエータであってもよい。 For example, as a gap forming means for forming the gaps 53 and 453, any means can be used instead of the projecting portions 41 and 441. For example, the gap forming unit may be a unit that blows air along the lower surface of the supply gates 40 and 440 after the supply gates 40 and 440 are closed. Alternatively, the gap forming means may be an actuator that moves the storage tanks 30 and 430 upward after the supply gates 40 and 440 are closed.
　また、開口３１，４３１は、計量槽５０，４５０の外部（つまり上方）に配置されていてもよい。もとより、供給ゲート４０，３４０，４４０の下面の移動軌跡は、計量槽５０，４５０の外部（つまり上方）に位置していてもよい。この場合は、飛散防止壁４５６によって、計量対象物９０が計量槽５０の外部に飛散することが防止されてもよい。 Moreover, the openings 31 and 431 may be arranged outside (that is, above) the measuring tanks 50 and 450. Of course, the movement trajectory of the lower surfaces of the supply gates 40, 340, and 440 may be located outside (that is, above) the weighing tanks 50 and 450. In this case, the measurement object 90 may be prevented from being scattered outside the measurement tank 50 by the scattering prevention wall 456.
　　２０，４２０…計量装置
　　３０，４３０…貯留槽
　　３１，４３１…開口
　　３５，３３５，３３６，４３５…移動軌跡
　　４０，３４０，４４０…供給ゲート
　　４１，４４１…突出部
　　５０，４５０…計量槽
　　５１…排出口
　　５２…ロードセル
　　５３，３５３，４５３…隙間
　　５４…外縁部
　　５５…本体フレーム
　　６０…排出ゲート
　　７０…センサ
　　８０…制御部
　　９０…計量対象物
　　３４１，３４２…端部
　　３４３…支点
　　４５６…飛散防止壁 20, 420 ... weighing device 30, 430 ... storage tank 31, 431 ... opening 35, 335, 336, 435 ... movement locus 40, 340, 440 ... supply gate 41, 441 ... protrusion 50, 450 ... weighing tank 51 ... drain Exit 52 ... Load cell 53, 353, 453 ... Gap 54 ... Outer edge 55 ... Body frame 60 ... Discharge gate 70 ... Sensor 80 ... Control part 90 ... Weighing object 341, 342 ... End 343 ... Supporting point 456 ... Anti-scattering wall

Claims (13)

  1. 　計量装置であって、
    　計量対象物を貯留するための貯留槽であって、下部に開口が形成された貯留槽と、
    　前記開口を開閉するための供給ゲートと、
    　前記貯留槽よりも下方に設けられ、前記貯留槽から前記開口を介して供給された前記計量対象物を貯留するための計量槽であって、ロードセルに支持される計量槽と、
    　を備え、
    　前記供給ゲートの開閉動作時における該供給ゲートの下面の移動軌跡は、少なくとも前記開口の直下の領域において前記計量槽の内部に位置するように設定された
    　計量装置。     A weighing device,
    A storage tank for storing a measurement object, and a storage tank having an opening formed in a lower part;
    A supply gate for opening and closing the opening;
    A measuring tank provided below the storage tank, for storing the measurement object supplied from the storage tank via the opening, and supported by a load cell;
    With
    A measuring device in which the movement trajectory of the lower surface of the supply gate during the opening / closing operation of the supply gate is set so as to be located inside the measurement tank at least in a region immediately below the opening.
  2. 　請求項１に記載の計量装置であって、
    　前記開口は、前記計量槽の内部に配置された
    　計量装置。     The weighing device according to claim 1,
    The opening is a measuring device arranged inside the measuring tank.
  3. 　請求項１または請求項２に記載の計量装置であって、
    　前記貯留槽から前記計量槽に前記計量対象物が供給された後に前記供給ゲートが閉じたときに、該供給ゲートと、前記計量槽に貯留された前記計量対象物と、の間に隙間を形成するための隙間形成手段を備える
    　計量装置。     A metering device according to claim 1 or claim 2,
    A gap is formed between the supply gate and the measurement object stored in the measurement tank when the supply gate is closed after the measurement object is supplied from the storage tank to the measurement tank. A measuring device provided with a gap forming means.
  4. 　請求項３に記載の計量装置であって、
    　前記隙間形成手段は、前記供給ゲートの前記下面の、該供給ゲートの閉動作時における進行方向前方端側に、前記下面から下方に突出するように設けられた突出部である
    　計量装置。     A weighing device according to claim 3,
    The gap forming means is a projecting portion provided on the front end side of the lower surface of the supply gate in the advancing direction during the closing operation of the supply gate so as to protrude downward from the lower surface.
  5. 　請求項１または請求項２に記載の計量装置であって、
    　前記供給ゲートは、支点を中心に枢動するように構成され、
    　前記供給ゲートの前記下面の、枢動方向に沿った縦断面は、円弧形状であり、
    　前記円弧形状は、前記供給ゲートの閉動作時の進行方向前方側の半径が後方側の半径よりも大きくなるように設定された
    　計量装置。     A metering device according to claim 1 or claim 2,
    The supply gate is configured to pivot about a fulcrum;
    The longitudinal section along the pivot direction of the lower surface of the supply gate has an arc shape,
    The arcuate shape is set so that the radius on the front side in the traveling direction when the supply gate is closed is larger than the radius on the rear side.
  6. 　請求項１ないし請求項５のいずれか一項に記載の計量装置であって、
    　前記移動軌跡は、該移動軌跡の、前記供給ゲートの閉動作時の進行方向前方側の端部が、前記貯留槽の外縁部よりも内側に位置するように設定された
    　計量装置。     A weighing device according to any one of claims 1 to 5,
    The moving track is set such that the end of the moving track on the front side in the traveling direction when the supply gate is closed is positioned on the inner side of the outer edge of the storage tank.
  7. 　請求項１ないし請求項６のいずれか一項に記載の計量装置であって、
    　所定量以上の前記計量対象物が前記貯留槽内に貯留されているか否かを検出可能なセンサと、
    　前記計量装置の動作を制御する制御部と
    　を備え、
    　前記制御部は、前記貯留槽に前記所定量以上の計量対象物が貯留されているときに、前記供給ゲートを開けて前記貯留槽から前記計量槽に前記計量対象物を供給するように前記計量装置を制御する
    　計量装置。     A weighing device according to any one of claims 1 to 6,
    A sensor capable of detecting whether a predetermined amount or more of the weighing object is stored in the storage tank;
    A control unit for controlling the operation of the weighing device,
    The control unit is configured to open the supply gate and supply the measurement object from the storage tank to the measurement tank when the measurement object of the predetermined amount or more is stored in the storage tank. Weighing device that controls the device.
  8. 　請求項７に記載の計量装置であって、
    　前記制御部は、前記貯留槽に前記所定量以上の計量対象物が貯留されていない場合、前記所定量以上の計量対象物が貯留されるまで待機した後に、前記供給ゲートを開けて前記貯留槽から前記計量槽に前記計量対象物を供給する第１の動作モードで前記計量装置を制御する
    　計量装置。     A weighing device according to claim 7,
    When the weighing object of the predetermined amount or more is not stored in the storage tank, the control unit waits until the measurement object of the predetermined amount or more is stored, then opens the supply gate and opens the storage tank A weighing device that controls the weighing device in a first operation mode for supplying the weighing object to the weighing tank.
  9. 　請求項７に記載の計量装置であって、
    　前記制御部は、前記貯留槽に前記所定量以上の計量対象物が貯留されていない場合、前記所定量以上の計量対象物が貯留されるまで待機することなく、前記供給ゲートを開けて前記貯留槽から前記計量槽に前記計量対象物を供給する第２の動作モードで前記計量装置を制御し、
    　前記第１の動作モードで前記計量装置を制御する場合において前記供給ゲートを閉めてから計量を開始するまでの時間は、前記第２の動作モードで前記計量装置を制御する場合において前記供給ゲートを閉めてから計量を開始するまでの時間よりも短く設定された
    　計量装置。     A weighing device according to claim 7,
    When the weighing object of the predetermined amount or more is not stored in the storage tank, the control unit opens the supply gate without waiting until the weighing object of the predetermined amount or more is stored. Controlling the weighing device in a second operation mode for supplying the weighing object from a tank to the weighing tank;
    In the case of controlling the weighing device in the first operation mode, the time from the closing of the supply gate to the start of weighing is determined by the supply gate in the case of controlling the weighing device in the second operation mode. Weighing device set to be shorter than the time from closing until the start of weighing.
  10. 　計量装置であって、
    　計量対象物を貯留するための貯留槽であって、下部に開口が形成された貯留槽と、
    　前記開口を開閉するための供給ゲートと、
    　前記貯留槽よりも下方に設けられ、前記貯留槽から前記開口を介して供給された前記計量対象物を貯留するための計量槽であって、ロードセルに支持される計量槽と、
    　を備え、
    　前記供給ゲートが開けられた状態、かつ、前記貯留槽内の前記計量対象物と前記計量槽内に貯留された前記計量対象物とが連続している状態で前記供給ゲートを閉じ、その後、前記ロードセルによる計量を行うように構成された
    　計量装置。     A weighing device,
    A storage tank for storing a measurement object, and a storage tank having an opening formed in a lower part;
    A supply gate for opening and closing the opening;
    A measuring tank provided below the storage tank, for storing the measurement object supplied from the storage tank via the opening, and supported by a load cell;
    With
    The supply gate is closed in a state where the supply gate is opened, and the measurement object in the storage tank and the measurement object stored in the measurement tank are continuous. A weighing device configured for weighing with a load cell.
  11. 　計量装置に使用するためのゲートであって、
    　ゲート本体と、
    　前記ゲート本体の１つの面から突出した突出部と
    　を備えるゲート。     A gate for use in a weighing device,
    The gate body,
    A gate provided with a protrusion protruding from one surface of the gate body.
  12. 　計量装置に使用するためのゲートであって、
    　前記円弧形状の縦断面を有する面を備え、
    　前記円弧形状は、該円弧形状に沿った一方側の半径が他方側の半径よりも大きくなるように設定された
    　ゲート。     A gate for use in a weighing device,
    Comprising a surface having a longitudinal section of the arc shape,
    The arc shape is set such that a radius on one side along the arc shape is larger than a radius on the other side.
  13. 　計量装置の作動方法であって、
    　下部に開口が形成された貯留槽と、前記開口を開閉するための供給ゲートと、前記貯留槽よりも下方に設けられ、ロードセルに支持される計量槽と、を備える計量装置を用意する工程と、
    　前記供給ゲートを開けて、前記貯留槽に貯留された計量対象物を、前記開口を介して前記計量槽に供給する第１の工程と、
    　前記第１の工程の後に、前記貯留槽内の前記計量対象物と前記計量槽内に貯留された前記計量対象物とが連続している状態で前記供給ゲートを閉じる第２の工程と、
    　前記第２の工程の後に、前記ロードセルによって、前記計量槽内の前記計量対象物を計量する第３の工程と
    　を備える計量装置の作動方法。     A method of operating a weighing device,
    Providing a weighing device comprising: a storage tank having an opening formed in a lower portion; a supply gate for opening and closing the opening; and a weighing tank provided below the storage tank and supported by a load cell; ,
    A first step of opening the supply gate and supplying the measurement object stored in the storage tank to the measurement tank via the opening;
    After the first step, a second step of closing the supply gate in a state in which the measurement object in the storage tank and the measurement object stored in the measurement tank are continuous;
    After the second step, a third step of measuring the object to be measured in the measuring tank by the load cell.
PCT/JP2018/006612 2017-02-27 2018-02-23 Weighing device, gate, and method of operating weighing device WO2018155606A1 (en)

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