JP2006194713A - Continuous balance - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To weigh with high precision free of influence of a kinetic impact while weighing articles being continuously supplied. <P>SOLUTION: A supply conveyor 2 supplies articles being continuously supplied to a weighing conveyor 16 with a time interval per batch. The weighing conveyor 16, each time a batch of article are supplied, weighs the batch of articles and then discharges them into a discharge conveyor 32. During the weighing the articles are not supplied to the weighing conveyor 16. On the discharge conveyor 32, the article from the weighing conveyor 16 is supplied to the rear of the article supplied beforehand to be conveyed as continuous articles. A weighed value at the weighing conveyor 16 is integrated by an operational integrator 30. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a continuous balance that measures, for example, in a state in which powder particles or massive materials are continuously supplied.

  Conventionally, as a continuous weighing scale, for example, there are a loss-in-weight type, an impact type, a Coriolis type and the like as disclosed in Non-Patent Document 1. In the loss-in-weight method, a certain amount of powder is stored in a weighing hopper, and the powder is sequentially discharged from the lower part of the weighing hop with a feeder. At this time, since the remaining amount of the powder in the weighing hopper decreases, the amount of decrease in weight per time is measured and the flow rate is measured. The impact type utilizes the fact that the horizontal component of the impact force applied to the detection plate is proportional to the instantaneous mass of the powder by allowing the powder to fall naturally from a feeder, etc. Is. In the Coriolis method, when a circular plate with radially arranged guides is rotated at a constant speed and powder is introduced into the circular plate, the powder hits the guide to obtain centrifugal force and is discharged from the end of the circular plate. Meanwhile, the tangential speed of the powder increases. The increase in speed indicates that the powder has undergone acceleration, where Coriolis force is generated. The shaft of the disk is twisted by the reaction force of the Coriolis force, and this torsional moment is proportional to the mass flow rate. By measuring this, the mass flow is obtained. There is also a conveyor scale type as disclosed in Non-Patent Document 2. In the conveyor scale type, the mass of articles transported by the belt conveyor is detected by the load detection device via the conveyor belt, the movement amount of the conveyor belt is detected by the belt speed detection device, and the transport amount is determined based on these detection values. calculate.

Practical flow measurement Hiroshi Matsuyama Energy Conservation Center, June 15, 1999 First edition, second edition issued Pages 202-203 pages 206-209 Scale, published by the Japan Metrology Equipment Industry Association, November 15, 1991, pages 176-179

  In any of these methods, a motion shock due to the operation of loading or unloading an object to be weighed acts during the weighing operation. Therefore, it was not possible to measure with high accuracy.

  An object of the present invention is to provide a continuous scale capable of weighing with high accuracy without being affected by a motion shock while weighing continuously supplied articles.

  The continuous scale according to the present invention has an article supply means for carrying out articles that are continuously supplied at intervals of one batch. Each time a batch of articles supplied from the article supply means is supplied, the weighing means weighs the batch of articles and then carries it out. In this case, the weighing means may weigh the total weight of the tare and the batch of articles that the weighing unit has. Each time a batch of articles is discharged from the weighing means, the conveying means receives the batch of articles at the subsequent stage of the previously discharged batch of articles and conveys it as a continuous article. The accumulating means accumulates the measurement values obtained by the weighing means.

  In the continuous scale constructed in this way, the articles supplied continuously are supplied to the weighing means in batches and weighed. During this weighing, new articles are not supplied to the weighing means. It is possible to measure with high accuracy without being affected by Moreover, since the articles carried out from the weighing means are converted again into a continuous flow in the carrying-out means, it can be used even if the equipment used in the next process is an existing equipment that supports the continuous flow. It is.

  In the integrating means, for example, a difference between a total measured value of the batch of articles and the tare of the weighing means and a measured value of the tare after discharging the batch of articles is set as a measured value of the batch of articles. , Integrating the weighing values of the batch of articles from the weighing means.

  The weighing means may be configured such that the zero point adjustment is performed before a batch of articles is conveyed and a new batch of articles is supplied. With this configuration, even if the weighing signal of the weighing means is electrically offset as the environment changes, or even if an article is attached to the weighing means and the weighing signal of the weighing means is mechanically offset, Can be removed, and measurement can be performed with high accuracy.

  The article supply means may be a supply conveyor that conveys continuously supplied articles in a predetermined direction. In this case, the front end portion of the supply conveyor reciprocates between the first forward position and the first backward position determined along the predetermined direction. The weighing means is a weighing conveyor. The weighing conveyor is capable of reciprocating between a second forward position whose front end is ahead of the first forward position along the predetermined direction and a second backward position behind the second forward position. It is configured. A batch of articles is loaded from the supply conveyor onto the weighing conveyor by moving the leading edge of the supply conveyor from the first forward position to the first backward position when the tip of the weighing conveyor is in the second forward position. Is done. The weighing conveyor weighs the batch of articles until the leading edge of the batch of articles reaches the leading edge of the weighing conveyor in the second advanced position. The transport means is a transport conveyor. In this conveyor, after the weighing of the weighing conveyor is completed, the tip of the weighing conveyor is moved from the second forward position to the second backward position, so that the tip of a batch of articles has already been supplied from the weighing conveyor. The batch of articles is received and transported so as to be positioned substantially behind the batch.

  Alternatively, the article supply means may continuously supply the article to the first rotating body from one point of a locus drawn by rotating the peripheral edge of the first rotating body in the first direction. In this case, first scraping means that rotates in the second direction opposite to the first direction is provided on the first rotating body. While the first scraping means rotates from the point of contact with the tip of the supplied article to one point of the trajectory, the supplied article is carried out as a batch of articles. In the measurement means, the second rotating body arranged concentrically with the first rotating body rotates. The weighing means conveys a batch of articles scraped from the first rotating body to a position of a second scraping means provided at a fixed position, and after all of the batch of articles is supplied, the tip thereof is Weighing until reaching the position of the second scraping means. Further, the weighing means scrapes the batch of articles by the second scraping means. The conveying means has a third rotating body that is arranged concentrically with the second rotating body and rotates. The conveying means also has third scraping means for scraping the articles supplied in order by the second scraping means on the third rotating body during one rotation. When the third scraping means makes one rotation, a new article is supplied onto the third disk by the second scraping means.

  As described above, according to the continuous balance according to the present invention, it is possible to measure with high accuracy without being subjected to a motion shock during measurement, and to supply a continuous flow of articles to subsequent devices. Can do.

  The continuous balance of the first embodiment of the present invention has article supply means, for example, a supply conveyor 2 as shown in FIG. The supply conveyor 2 is constituted by, for example, a belt conveyor, and a strap, for example, a belt 8 is stretched between a pulley 4 at the front end and a pulley 6 at the rear end, and the pulley 6 is driven by driving means (not shown). As a result, the belt 8 travels in the first direction, for example, toward the pulley 4, and at that time, the article is supported and conveyed by the upper surface of the belt 8. In the vicinity of the pulley 6 of the supply conveyor 2, articles are continuously supplied by another supply means, for example, a belt conveyor 10. The front end pulley 4 of the supply conveyor 2 is forcibly reciprocated between a first forward position indicated by a dotted line and a first reverse position indicated by a solid line by a built-in shuttle drive unit 12. When the pulley 4 at the leading end reciprocates, the length of the belt 8 fluctuates. Therefore, when the pulley 4 is in the first forward position, the belt length adjusting pulley 14 is positioned at a position indicated by a dotted line, and the pulley 4 is When the belt length adjusting pulley 14 is in the 1 reverse position, the belt length adjusting pulley 14 is positioned at a position indicated by a solid line to absorb the fluctuation in the length of the belt 8.

  The continuous scale also has weighing means, for example a weighing conveyor 16. The weighing conveyor 16 is arranged below and in parallel with the supply conveyor 2. Similar to the supply conveyor 2, the weighing conveyor 16 also includes a belt conveyor. The belt conveyor includes a front end pulley 18, a rear end pulley 20, a belt 22, a shuttle drive unit 24, and a belt length adjusting pulley 26. The tip pulley 18 also reciprocates between the second forward position and the second backward position, but the second forward position is ahead of the first forward position, and the second backward position is greater than the first forward position. Is set to the rear side, for example, somewhat forward of the first forward position. The distance between the first forward position and the first reverse position and the distance between the second forward position and the second reverse position are set to be equal. The entire belt conveyor is supported by load detection means, for example, a load cell 28. A weighing signal from this load cell 28 (weighing signal indicating the weight of one batch of articles and the total weight of the tare of the belt conveyor or the like) is supplied to an integrating means, for example, a calculation / integrating meter 30, where The weight is calculated, integrated and displayed.

  This continuous scale also has conveying means, for example a belt conveyor 32. The belt conveyor 32 is disposed below the weighing conveyor 16 in substantially parallel to the weighing conveyor 16, and has a belt 38 stretched between a front end pulley 34 and a rear end pulley 36. However, the front end pulley 34 is positioned in front of the second advance position of the front end pulley 18 of the weighing conveyor 16, and the rear end pulley 36 is the second advance position of the front end side pulley 18 of the weighing conveyor 16. It is located between 2 backward positions.

  In this continuous scale, articles continuously supplied from the belt conveyor 10 to the supply conveyor 2 are supplied to the weighing conveyor 16 with a time interval for each batch. The weighing conveyor 16 weighs articles for each batch. At this time, since the articles are not supplied from the supply conveyor 2 to the weighing conveyor 16, the impact due to the article supply is not applied to the weighing conveyor 16, and can be measured with high accuracy. One batch of articles weighed by the weighing conveyor 16 is supplied to the belt conveyor 32. This supply is performed just behind the articles already supplied to the belt conveyor 32, and each batch of articles is conveyed as a continuous stream of articles.

  Hereinafter, the above operation will be described in detail with reference to FIG. The conveyors 2, 10, 16, and 32 are all operated at the same speed. In addition, the period of each step shown below is the same.

  In Step 0, the pulley 4 on the front end side of the supply conveyor 2 is in the first retracted position, and the article is supplied to the front end portion. Between Step 0 and Step 1, the pulley 4 on the front end side of the supply conveyor 2 moves at a stretch to the first advance position. From step 1 to step 4, the article advances on the supply conveyor 2. In Step 4, the tip pulley 18 of the weighing conveyor 16 has advanced to the second advanced position.

  Between steps 4 and 5, the front end side pulley 4 of the supply conveyor 2 is retracted all at once to the first retracted position. As a result, in step 5, the articles that were between the first forward position and the first backward position on the supply conveyor 2 are loaded on the weighing conveyor 16 as a batch of articles. At this time, the tip of one batch of articles has not yet reached the pulley 18 on the tip side of the weighing conveyor 16.

  In step 6, the total weight of the batch of articles and the tare such as the belt conveyor of the weighing conveyor 16 is measured before the leading edge of the batch of articles reaches the pulley 18 on the leading end side of the weighing conveyor 16. Is called. In step 6, no new article is supplied on the weighing conveyor 16. Accordingly, no impact is applied to the weighing conveyor 16 during weighing, and weighing is performed with high accuracy.

  Between Step 6 and Step 7, the tip pulley 18 of the weighing conveyor 16 moves from the second forward position to the second backward position at once, and a batch of articles on the weighing conveyor 16 is supplied onto the belt conveyor 32. In step 7, the conveyance toward the front end pulley 18 is started.

  In Step 8, the tip pulley 18 of the weighing conveyor 16 that has been retracted to the second retracted position moves forward to the second advanced position to prepare for the next weighing.

  In step 9, since no articles are loaded or discharged on the weighing conveyor 16, the zero point of the load cell 28 is adjusted during this time. That is, the offset due to the change in the environment of the weighing signal of the load cell 28 and the variation of the zero point due to the variation of the tare due to the attachment of the article to the conveyor belt 22 are corrected. If the influence of vibration caused by the movement of the pulley 18 on the front end side of the weighing conveyor 16 in step 8 from the second retracted position to the second advanced position can be ignored, zero adjustment is performed in step 8. You can also.

  In Step 10, the articles that have been supplied on the supply conveyor 2 in the same manner as in Steps 1 to 4 are loaded in the same manner as in Step 5 during Steps 6, 7, 8, and 9 described above. Thereafter, measurement, zero adjustment, and loading are repeated in the same manner.

  The batch of articles supplied on the belt conveyor 32 in step 7 is conveyed at a constant speed until step 11. In step 11, the tail of a batch of articles on the belt conveyor 32 reaches the position of the tip pulley 18 of the weighing conveyor 16 in the second advanced position. Then, in step 12, a new batch of articles is placed so that the top of the new batch of articles is positioned from the weighing conveyor 16 at the very end of the batch of articles preceding the belt conveyor 32. Two batches of articles are connected on the belt conveyor 32. As a result, the article is conveyed from the belt conveyor 32 to the next process at a constant flow rate without being interrupted or overlapping.

  Each time weighing is performed as in Steps 6 and 11, the calculation / integration meter 30 discharges the total weight of one batch of articles and a tare such as a belt conveyor of the weighing conveyor 16 and one batch of articles. The difference from the weight of the subsequent tare is calculated, the weight of one batch of articles is obtained, and the weight of this batch of articles is integrated. By dividing this integrated weight by the unit elapsed time, a flow rate value per unit time is calculated and displayed. As described above, since the zero point adjustment is performed in step 9 and the like, the error of the integrated value is very small.

  The continuous scale of the first embodiment can be applied to a wide range of applications from powders to aggregates because there is no unreasonable contact between the conveyor and the article. As an example of extreme things, it can also be applied to soft chunks such as meat pieces, raw hamburgers, raw croquettes, etc.For example, it can be used for renting the refrigerator in the subsequent stage in proportion to the processing weight, processing A precise efficiency calculation of the quantity and power cost of the refrigerator is also possible.

  FIG. 3 shows a continuous balance according to the second embodiment. This continuous scale has a disk feeder 40 as an article supply means. The disc feeder 40 has a first rotating body, for example, a disc 42. A rotating shaft 43 is provided at the center of the disc 42. A timing pulley 44 is attached to the rotation shaft 43. The timing pulley 44 includes a strap, for example, a timing belt 46, a timing pulley 50 attached to the shaft 48, another gear 52 provided on the shaft 48, a gear 54 meshing with the gear 52, and the gear 54 attached thereto. It is coupled to a driving means, for example, a motor 58 via a driving shaft 56. Accordingly, the disk 42 is rotated in a predetermined direction by the motor 58.

  As the circular plate 42 rotates, articles are continuously supplied by the belt conveyor 60 to one point of the rotation locus drawn by the peripheral edge thereof. In addition to the belt conveyor 60, various devices can be used as long as they can continuously supply articles such as a screw feeder. Since the disk 42 rotates and the article is supplied to one point of the rotation locus, the article is sequentially supplied on the above-described rotation locus on the disk 42.

  A rotating shaft 62 is disposed around the rotating shaft 43 so as to be rotatable separately from the rotating shaft. One arm 64 protrudes outward from the rotating shaft 62, and a first scraping means, for example, a scraper 66 is attached to the tip thereof. The scraper 66 is rotatably arranged on the above-described rotation locus, and scrapes the article outward and downward when contacting the article. A timing pulley 68 is provided on the rotating shaft 62. The timing pulley 68 is connected to a timing pulley 72 attached to the drive shaft 56 via a timing belt 70. Accordingly, the scraper 66 also rotates, and the rotation direction rotates in the direction opposite to the rotation direction of the disc 42.

  A weighing means, for example, a weighing disk feeder 74 is disposed below the disc 42. The weighing disc feeder 74 has a second rotating body, for example, a disc 76. The disc 76 is disposed concentrically with the disc 42, and the radius thereof is substantially the same as that of the disc 42. A rotary shaft 78 is inserted through the center of the disc 76 and is rotatably supported by the base 80. A timing pulley 82 is attached to the rotating shaft 78. The timing pulley 82 is connected via a timing belt 84 to a timing pulley 88 coupled to driving means, for example, a motor 86. Accordingly, the disk 76 rotates around the rotation shaft 78, and loads and conveys the article supplied from the disk feeder 40 on the rotation locus drawn by the peripheral edge thereof.

  The base 80 has second scraping means, for example, a scraper 90, so as to scrape the article that has reached a predetermined position on the rotation locus drawn by the peripheral edge of the disk 76 with the rotation of the disk 76 outward. Is fixed. The fixed position of the scraper 90 is a position rotated in the rotation direction of the disk 76 by 90 degrees from the position where the supply of the article is started on the disk 76 in the supply disk feeder 40 as will be described later.

  A load detecting means, for example, a load cell 92 is coupled to the base 80. The load cell 92 detects the weight of the article supplied on the disc 76, the scraper 90, the base 80, and the disc 76. From this weight, the weight of the disk 76, the scraper 90, and the base 80 is tared, the weight of the article on the disk 76 is calculated, and supplied to the calculation integrator 94.

  Below the weighing disk feeder 74, unloading means, for example, a unloading disk feeder 96 is arranged. The carry-out disc feeder has a third rotating body, for example, a disc 98. The disc 98 is arranged concentrically with the disc 76 and has substantially the same radius as the disc 76. A rotating shaft 100 is attached to the center of the disc 98. A timing pulley 102 is attached to the rotating shaft 100, and is connected to a timing pulley 106 attached to the drive shaft 56 via a timing belt 104. Accordingly, the disk 98 rotates according to the rotation of the motor 58, and according to this rotation, the article is supplied from the weighing disc feeder 40 on the rotation locus drawn by the peripheral edge thereof, and the article is conveyed.

  A rotary shaft 108 is provided inside the rotary shaft 100 so as to be rotatable independently of the rotary shaft 100, and an arm 110 extends outward from one end portion of the rotary shaft 100. Scraping means, for example, a scraper 112 is attached. The scraper 112 is disposed so as to be positioned in a rotation locus drawn by the peripheral edge when the disk 98 rotates. A timing pulley 114 is attached to the other end of the rotating shaft 108, and this timing pulley 114 is connected to a timing pulley 116 provided on the drive shaft 56 via a timing belt 116. Accordingly, the scraper 112 also rotates in the same direction as the disk 98 as the motor 58 rotates. When the scraper 112 comes into contact with the article, the scraper 112 discharges the article to the hopper 118.

  The motors 58 and 86 are controlled to rotate synchronously by the controller 118 and rotate at the same speed. Each timing pulley, timing belt, and gear described above constitute a rotation transmission mechanism.

  The disk 42 and the scraper 66 of the supply disk feeder 40 rotate in the opposite directions as described above. The rotation speed of the scraper 66 is selected to be three times that of the disk 42. Further, the rotating direction of the disc 76 of the measuring disc feeder 74 rotates in the direction opposite to the rotating direction of the disc 42 of the supply disc feeder 74, that is, the same direction as the rotating direction of the scraper 66. The rotation speed is selected to be the same as the rotation speed of the scraper 66. Further, the disc 98 of the carry-out disc feeder 96 rotates in the same direction as the rotation direction of the disc 42 of the supply disc feeder 40. The rotation speed is selected to be four times the rotation speed of the disc 42. Further, the rotation direction of the scraper 112 of the carry-out disc feeder 40 rotates in the same direction as the rotation direction of the disc 98. The rotation speed is the same as the rotation speed of the scraper 66 of the supply disk feeder 40. That is, the speed is selected to be 3/4 of the rotational speed of the disk 98.

  If the speed of the scraper 66 of the supply feeder 40 is 1, the speed of the disk 42 of the supply disk feeder 40 is 1/3, the speed of the disk of the weighing disk feeder 74 is 1, and the disk 98 of the unloading disk feeder 96. The rotation speed of the scraper 112 of the carry-out disk feeder 96 is 1/3. The rotation direction is the same for the scraper 56 of the supply disk feeder 40 and the disk 76 of the weighing disk feeder 74, and in the opposite direction, the disk 42 of the supply disk feeder 40 and the disk 98 of the unloading disk feeder 96. The scraper 112 rotates.

  Hereinafter, the operation of the supply disk feeder 40 of the continuous scale will be described with reference to FIGS. 4 to 6. As shown in step 0 of FIG. 4, the scraper 66 is positioned at a supply position that is a fixed position of the peripheral edge of the disk 42 by the supply conveyor 60. From this state, the scraper 66 rotates clockwise in FIG. 4, and the disc 42 rotates counterclockwise. In addition, each step shown below has shown the state which the scraper 66 rotated 30 degree | times.

  In step 1, the scraper 66 rotates 30 degrees clockwise, the disk 42 rotates 10 degrees counterclockwise, and the articles are supplied to the disk 42 within a range of 10 degrees from the supply position. Thereafter, after steps 2, 3, 4, 5, 6, 7, and 8, in step 9 shown in FIG. 5, the scraper 66 rotates 270 degrees clockwise and the disk 42 rotates 90 degrees counterclockwise. To do. As a result, the tip of the article in the rotational direction of the disc 42 comes into contact with the scraper 66, and scraping of the article to the weighing disk feeder 74 is started. Thereafter, through steps 10, 11, and 12, the scraper 66 returns to the position of the scraper 66 in step 0, and the articles supplied to the range of 90 degrees counterclockwise from the supply position of the disk 42 are measured disk feeder 74. To supply.

  After that, the articles are supplied along the rotation direction of the disk 42 until the step S13, 14, 15, 16, 17, 18, 19, 20 is performed to the step 21, and the scraper 66 is in the direction opposite to the disk 42. Therefore, the scraper 66 does not come into contact with the article, and the article is not scraped out to the weighing disc feeder 74. From step 21 to steps 22 and 23, the article is supplied to the weighing disc feeder 74 in the same manner as described above. In this way, a part of the articles supplied to the disc 42 among the articles supplied continuously is supplied to the weighing disk feeder 74 as a batch, and is repeated with time.

  The operation of the weighing disc feeder 74 will be described with reference to FIGS. In step 9 described above, that is, in the supply disk feeder 40, articles are supplied to the weighing disk feeder 74. At this time, there is an angular difference of 180 degrees between the point where the supply of the article is started and the fixed scraper 90. Since the scraper 66 of the supply disk feeder 40 and the disk 76 of the weighing disk feeder 74 rotate in the same direction at the same speed, in step 10, the supply disk feeder 40 is placed on the disk 76 over a range of about 30 degrees. Goods are supplied from. Hereinafter, in step 12 through step 11, the article is supplied over a range of about 90 degrees. Thereafter, no new article is supplied.

  Then, weighing by the load cell 92 is started, and a batch of articles is weighed through steps 13 and 14 to step 15. During this time, no new article is supplied and no impact is applied to the load cell 92 during weighing. After step 15, the tip of the batch of articles starts to contact the scraper 90, and the batch of articles is scraped onto the disk feeder 96 by the scraper 90.

  This scraping is finished in step 18, and thereafter the article is not supplied onto the disk 76 until step 21. During this time, zero adjustment is performed, and after the completion of step 21, a batch of articles is newly supplied in the same manner as described above in steps 22, 23, and 24.

  The operation of the carry-out feeder 96 will be described with reference to FIGS. In step 15, the scraper 112 is located at a point where the supply of the article from the weighing disc feeder 74 is started. Then, the disc 92 and the scraper 112 rotate in the same direction, and the article is supplied onto the disc 98. However, while the scraper 112 rotates for one step, that is, 30 degrees, the disk 98 rotates 40 degrees, which is 4/3 times that. Accordingly, since the disk 98 is faster than the scraper 112, the top of the supplied article contacts the scraper 112, and the article is supplied onto the disk 98 as shown in steps 16, 17, and 18. Meanwhile, the article is scraped out to the hopper 118 by the scraper 112. The supply of the article is finished in Step 18, and thereafter, the scraper 112 is rotated once as shown in Steps 19, 20, 21, 22, 23, 24, 25, 26, and 27, and is supplied by Step 18. The article is discharged to the hopper 118. In step 27, the state is exactly the same as in step 15, supply of a new article is started, and discharge is performed. Accordingly, the articles supplied to the carry-out feeder 96 for each batch are supplied to the hopper 118 in a continuous flow.

  The measured value measured in the load cell 92 between step 12 and step 15 is supplied to the calculation integrator 94, the integrated weight is calculated, and this integrated weight is divided by the unit elapsed time to obtain the unit per unit time. The flow rate is calculated and displayed. Further, the zero point adjustment is performed while no article is supplied to the weighing disc feeder 74 from Step 18 to Step 21. The zero point change due to the change of the zero point due to the environmental change of the load cell 92 and the change of the zero point due to the change of the tare due to the article remaining on the disc 76 are also corrected by this zero point adjustment.

  The continuous balance of the second embodiment can be applied to a granular material or a lump that may be broken. Further, by enclosing the entire continuous table with a cover, it is possible to provide factory equipment that does not affect the environment as a sealed continuous meter and mass flow meter without discharging powder or the like to the outside.

  In the first embodiment, belt conveyors are used for the supply conveyor 2, the weighing conveyor 16, and the transport conveyor 32. However, the present invention is not limited to this, and any conveyor that can support and transport articles on the upper surface can be used. Various types can be used. In the second embodiment, the disc feeders 40, 74, and 96 use the discs 42, 76, and 98. However, the present invention is not limited to this, and the disc feeders 40, 74, and 96 can rotate while supporting an article on the peripheral edge of the upper surface. As long as it is, various things can be used, for example, a polygonal thing can also be used. Further, although the disk feeders are arranged concentrically as the simplest form, it is not always necessary to arrange them concentrically.

It is a schematic block diagram of the continuous balance of the 1st Embodiment of this invention. It is operation | movement explanatory drawing of the continuous balance of FIG. It is a schematic block diagram of the continuous balance of the 2nd Embodiment of this invention. It is a figure which shows the operation state from step 0 to step 7 of the supply disk feeder in the continuous balance of FIG. It is a figure which shows the operation state from step 8 to step 15 of the supply disk feeder in the continuous balance of FIG. It is a figure which shows the operation state from step 16 to step 23 of the supply disc feeder in the continuous balance of FIG. It is a figure which shows the operation state from step 9 to step 16 of the measurement disc feeder in the continuous balance of FIG. It is a figure which shows the operation state from step 17 to step 24 of the measurement disc feeder in the continuous balance of FIG. It is a figure which shows the operation state from step 15 to step 22 of the carrying-out disk feeder in the continuous balance of FIG. It is a figure which shows the operation state from step 23 to step 30 of the carrying-out disk feeder in the continuous balance of FIG.

Explanation of symbols

2 Supply conveyor (article supply means)
16 Weighing conveyor (measuring means)
32 Unloading conveyor (unloading means)
40 Supply disc feeder (article supply means)
74 Weighing disc feeder (Measuring means)
96 Unloading disk feeder (unloading means)

Claims (7)

Article supply means for carrying out the articles supplied continuously at intervals of one batch;
A weighing means for weighing each batch of articles each time a batch of articles supplied from the article supply means is fed, and then carrying them out;
Each time a batch of articles is discharged from the weighing means, the conveying means for receiving the batch of articles at a subsequent stage of the previously discharged batch of articles as a continuous article;
Integrating means for integrating the measured values in the measuring means;
A continuous scale provided.   The continuous scale according to claim 1, wherein the integrating means calculates a difference between a total measured value of the batch of articles and the tare of the weighing means and a measured value of the tare after discharging the batch of articles. A continuous scale that weighs the value of a batch of articles and integrates the weight.   2. The continuous balance according to claim 1, wherein the weighing means carries out zero adjustment while a batch of articles is conveyed and a new batch of articles is supplied. The continuous scale according to claim 1,
The article supply means is a supply conveyor that conveys articles to be continuously supplied in a predetermined direction, and has a first forward position and a first reverse position, the tip of which is defined along the predetermined direction. Reciprocating between,
The measuring means is capable of reciprocating between a second forward position whose tip is ahead of the first forward position along the predetermined direction and a second backward position that is rearward of the second forward position. A batch from the supply conveyor by moving the tip of the supply conveyor from the first forward position to the first reverse position when the tip of the metering conveyor is in the second forward position. Until the leading edge of the batch of articles reaches the leading edge of the weighing conveyor at the second advanced position, the weighing conveyor is in the middle of the weighing conveyor. Weigh
The transport means is a transport conveyor, and after completion of weighing by the weighing conveyor, a batch of articles is moved from the weighing conveyor by moving the leading end of the weighing conveyor from the second forward position to the second backward position. A continuous scale that receives and conveys the front end of the batch so that it is positioned substantially behind the batch of articles already supplied to the conveying means.   4. The continuous scale according to claim 3, wherein the zero adjustment of the weighing conveyor is performed after the weighing conveyor supplies a batch of articles to the carry-out conveyor until a new batch of articles is supplied. Continuous scale. The continuous scale according to claim 1,
The article supply means continuously supplies articles to the first rotating body from one point of a locus drawn by rotating the peripheral edge of the first rotating body in the first direction, and the first direction on the first rotating body. A first scraping means that rotates in a second direction opposite to the first scraping means, and the first scraping means rotates from one point of contact with the tip of the fed article to one point of the trajectory. Unload as a batch of goods,
The weighing means is configured such that a second batch of articles scraped from the first rotating body is rotated by a second rotating body arranged concentrically with the first rotating body. Transported to a position, weighed until all of the batch of articles has been supplied until the tip reaches the position of the second scraping means, and scraped the batch of articles by the second scraping means,
The conveying means has a third rotating body that is arranged concentrically with the second rotating body and rotates, and scrapes the articles sequentially supplied by the second raking means on the third rotating body during one rotation. A continuous scale having three scraping means, and when the third scraping means makes one rotation, a new article is supplied onto the third disc by the second scraping means.   7. The continuous balance according to claim 6, wherein the weighing means performs zero point adjustment after the batch of articles is discharged and a batch of articles is newly supplied.

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