WO2012131789A1 - 組合せ秤 - Google Patents
組合せ秤 Download PDFInfo
- Publication number
- WO2012131789A1 WO2012131789A1 PCT/JP2011/003119 JP2011003119W WO2012131789A1 WO 2012131789 A1 WO2012131789 A1 WO 2012131789A1 JP 2011003119 W JP2011003119 W JP 2011003119W WO 2012131789 A1 WO2012131789 A1 WO 2012131789A1
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- WIPO (PCT)
- Prior art keywords
- weighing
- weighed
- conveyor
- objects
- collective
- Prior art date
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Classifications
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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
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
- B65G43/08—Control devices operated by article or material being fed, conveyed or discharged
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G11/00—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers
- G01G11/14—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers using totalising or integrating devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G11/00—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers
- G01G11/14—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers using totalising or integrating devices
- G01G11/16—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers using totalising or integrating devices being electrical or electronic means
- G01G11/18—Apparatus for weighing a continuous stream of material during flow; Conveyor belt weighers using totalising or integrating devices being electrical or electronic means using digital counting
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G13/00—Weighing apparatus with automatic feed or discharge for weighing-out batches of material
- G01G13/16—Means for automatically discharging weigh receptacles under control of the weighing mechanism
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/387—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for combinatorial weighing, i.e. selecting a combination of articles whose total weight or number is closest to a desired value
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/387—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for combinatorial weighing, i.e. selecting a combination of articles whose total weight or number is closest to a desired value
- G01G19/393—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for combinatorial weighing, i.e. selecting a combination of articles whose total weight or number is closest to a desired value using two or more weighing units
Definitions
- the present invention relates to a combination weigher for obtaining a combination in which the total weight of the objects to be weighed is within a predetermined target weight range.
- ⁇ Combination weighers can be broadly classified into automatic, semi-automatic, and manual types depending on the method of supplying and discharging the objects to be weighed.
- the manual combination weigher the objects to be weighed are supplied and discharged manually.
- the semi-automatic combination weigher the object to be weighed is supplied manually, and the object to be weighed is automatically discharged (for example, see Patent Document 1).
- an automatic combination weigher supply and discharge
- a manual or semi-automatic combination weigher is used for an object that cannot be automatically supplied to the combination weigher or an object that is not suitable for automatic operation.
- an alignment device for aligning the objects to be weighed discharged from the combination weigher may be separately provided after the combination weigher (see, for example, Patent Document 3).
- a semi-automatic conventional combination weigher for example, a plurality of hoppers are arranged in a straight line, and one belt conveyor is arranged therebelow.
- the operator supplies the object to be weighed to the hopper, the weight of the object to be weighed is weighed, the discharge gate of the hopper selected for the combination whose combination weight is within the predetermined weight range is opened and closed, and the object to be weighed is discharged.
- the object to be weighed discharged from the hopper is conveyed in one direction by a belt conveyor and discharged to a subsequent apparatus such as a packaging machine.
- the objects to be weighed fall from the plurality of hoppers selected for the combination to the belt conveyor, and then are conveyed and discharged by the belt conveyor.
- the objects to be weighed are in a rod shape or an elongated shape. In this case, it is impossible to discharge the objects to be weighed in the same direction.
- the objects to be weighed are discharged from the hopper selected for the combination onto the belt conveyor and conveyed, but the belt conveyor conveys the objects to be weighed in the direction in which the hoppers are arranged. Since the hopper is disposed at a position considerably higher than the belt conveyor so that the object to be weighed does not come into contact with the hopper, the impact is great when the object to be weighed falls from the hopper to the belt conveyor. Therefore, in the case of an object to be weighed that is fragile or easily damaged, it is easy to be damaged, and the product value is reduced due to the damage or cannot be sold as a product.
- the present invention has been made in order to solve the above-described problems, and does not damage even an object to be weighed that is fragile or easily damaged by an impact at the time of dropping, and the longitudinal direction of the object to be weighed. It is to provide a combination weigher that can be discharged in the same direction.
- a combination weigher includes a collective conveyor device that conveys and feeds the objects to be weighed in one direction, and a transport stop state, respectively.
- the objects to be weighed are supplied, and the objects to be weighed are transported in the first direction and discharged from one end to supply the objects to be weighed to the collective conveyor device in the transport operation state, and the collective conveyor device is transported
- a plurality of weighing conveyors arranged side by side, a plurality of weight sensors each provided corresponding to the weighing conveyor and measuring the weight of an object to be weighed supplied on the weighing conveyor; Based on the measurement value of the weight sensor, combination means for obtaining one discharge combination consisting of the combination of the weighing conveyors in which the total weight of the objects to be weighed within the target weight range is selected as the discharge combination.
- a weighing conveyor control means for driving a weighing conveyor that is being driven to convey an object to be weighed on the weighing conveyor in a first direction and discharging it from one end of the weighing conveyor, and the conveying speed of the collective conveyor device is It is comprised so that it may be faster than the conveyance speed of the said weighing conveyor.
- the object to be weighed when the object to be weighed is a rod-like or elongated object to be weighed, the object is measured so that the longitudinal direction of the object to be weighed is the same direction (including substantially the same direction) as the conveying direction of the weighing conveyor.
- the objects to be weighed discharged from the weighing conveyor will be rear parts other than the head part when the leading part of the objects to be weighed comes into contact with the transport surface of the collective conveyor device. Is on the weighing conveyor, and then the object to be weighed is discharged from the weighing conveyor while its leading portion is dragged in the conveying direction of the collective conveyor device.
- the direction of the longitudinal direction of the objects to be weighed can be changed smoothly in the same direction as the transport direction of the collective conveyor device,
- the objects to be weighed discharged from the respective weighing conveyors can be discharged from the collective conveyor apparatus with the direction in the longitudinal direction aligned with the conveying direction of the collective conveyor apparatus.
- the collective conveyor device may be arranged in parallel so that two conveyor belts having endless flat belts have a V-shaped cross section in the conveyance surface.
- the longitudinal direction of the objects to be weighed discharged from each weighing conveyor can be reliably aligned in the same direction as the transport direction of the collective conveyor apparatus, and the objects to be weighed can be prevented from rolling in the width direction of the collective conveyor apparatus (direction perpendicular to the transport direction).
- the combination weigher includes two belt conveyors having endless flat belts arranged in parallel so that the conveyance surface has a V-shaped cross section, and the object to be supplied is supplied.
- a collective conveyor device that conveys and discharges the material in one direction, and each of the objects to be weighed is supplied when the conveyance is stopped, and the object to be weighed is conveyed in the first direction and discharged from the conveying end.
- a plurality of weighing conveyors arranged side by side in the conveying direction of the collective conveyor device, each provided corresponding to the weighing conveyor, A plurality of weight sensors that measure the weight of the objects to be weighed supplied on the weighing conveyor, and the total weight of the objects to be weighed are within the target weight range based on the measurement values of the weight sensors.
- the weighing conveyor Combining means for obtaining one discharge combination consisting of a combination, and driving the weighing conveyor selected for the discharge combination to convey the objects to be weighed on the weighing conveyor in the first direction from one end of the weighing conveyor
- weighing conveyor control means for discharging.
- the object to be weighed when the object to be weighed is a rod-like or elongated object to be weighed, the object is measured so that the longitudinal direction of the object to be weighed is the same direction (including substantially the same direction) as the conveying direction of the weighing conveyor.
- the objects to be weighed discharged from the weighing conveyor will be rear parts other than the head part when the leading part of the objects to be weighed comes into contact with the transport surface of the collective conveyor device. Is on the weighing conveyor, and then the object to be weighed is discharged from the weighing conveyor while its leading portion is dragged in the conveying direction of the collective conveyor device.
- the objects to be weighed lie on the bottom part of the V-shaped section of the two belt conveyors on the collective conveyor device, so that the longitudinal direction of the objects to be weighed can be the same as the transport direction of the collective conveyor device.
- the two belt conveyors may be arranged with a gap therebetween, and the gap may be dimensioned so that the objects to be weighed on the two belt conveyors do not fall and the objects to be weighed are not pinched. .
- weighing means for weighing the objects to be weighed conveyed by the collecting conveyor apparatus
- Weight abnormality determination means for determining whether or not the weight of the object to be weighed by the weighing means is within the target weight range, and outputting a weight abnormality signal to the subsequent apparatus when it is not within the target weight range. And may be further provided.
- the latter device is configured so as to eliminate the objects to be weighed in response to the weight error signal, so that a weight-defective object that is not within the target weight range can be obtained. Can be prevented from being shipped.
- the plurality of weighing conveyors constitute first and second weighing conveyor groups arranged with the collective conveyor device interposed therebetween, and each of the first and second weighing conveyor groups includes
- the weighing conveyors to be configured are arranged in parallel, and the weighing conveyor of each of the first and second weighing conveyor groups has the collecting conveyor device positioned on the one end side, and the conveying direction of the collecting conveyor device is orthogonal to the collecting conveyor device. It may be arranged to do.
- the length of the collective conveyor apparatus can be shortened, the discharge time of the objects to be weighed can be shortened, and the combination scale can be made compact.
- the plurality of weighing conveyors constitute first and second weighing conveyor groups arranged with the collective conveyor device interposed therebetween, and each of the first and second weighing conveyor groups includes
- the measuring conveyors to be configured are arranged in parallel, the measuring conveyors of each of the first and second measuring conveyor groups have the collective conveyor device positioned on the one end side, and the conveying direction of the measuring conveyors is the set You may arrange
- the length of the collective conveyor apparatus can be shortened, the discharge time of the objects to be weighed can be shortened, and the combination scale can be made compact.
- the weighing conveyor so that the conveyance direction of the weighing conveyor forms an angle of less than 90 degrees with respect to the conveyance direction of the collective conveyor device, the angle for changing the direction of the objects to be weighed discharged from the weighing conveyor is changed. Since it may be smaller than 90 degrees, it becomes easy to change the longitudinal direction of the objects to be weighed in the same direction as the transport direction of the collective conveyor device.
- the weighing conveyor control further includes an appropriate amount determining means for determining whether or not the weight of the object to be weighed supplied to each of the weighing conveyors is within an appropriate range based on the measurement value of the weight sensor.
- the means causes the weighing conveyor, to which the object to be weighed that is not within the appropriate amount range is supplied based on the determination result by the appropriate amount determination means, to convey the object to be measured in a direction opposite to the first direction. And the object to be weighed may be discharged from the other end of the weighing conveyor.
- the weighing conveyors are reversely conveyed (conveyed in the direction opposite to the first direction), and the objects to be weighed that are not within the appropriate range are discharged from the other end.
- a combination consisting only of objects to be weighed with a uniform weight can be discharged.
- the weight range is set according to the combination selection number (the planned number of weighing conveyors selected as the discharge combination) that can provide high combination weighing accuracy.
- the weighing conveyor that transports the object to be weighed to the weighing unit that measures the weight of the object to be weighed is used, and the objects to be weighed discharged from the conveying end (one end) of the weighing conveyor Therefore, it is possible to reduce the step between the weighing conveyor and the collective conveyor device, and the impact when the objects to be weighed discharged from the weighing conveyor selected as the discharge combination are transferred onto the collective conveyor device. Less. Therefore, even an object to be weighed that is easily broken or damaged by an impact when dropped can be measured without being damaged.
- the present invention has the above-described configuration, and does not damage even an object to be weighed that is easily broken or damaged by an impact at the time of dropping, etc., and aligns the longitudinal direction of the object to be weighed. There is an effect that a combination scale that can be discharged can be provided.
- FIG. 1A is a plan view of a combination weigher according to an embodiment of the present invention as viewed from above
- FIG. 1B is a front view of the combination weigher
- FIG. It is a schematic diagram which shows the detail of the measurement part of a combination weigher, and a collective conveyor apparatus.
- FIG. 2 is a block diagram showing a schematic configuration of a combination weigher of one configuration example of the embodiment of the present invention.
- FIG. 3 is a flowchart illustrating an example of the operation of the combination weigher according to the configuration example of the embodiment of the present invention.
- FIG. 4A is a schematic diagram showing a movement state when an object to be weighed is transferred from one weighing conveyor to the collective conveyor apparatus, and FIG. FIG.
- FIG. 4C is a diagram illustrating a cross-section of the state when being transferred and transferred, and FIG. 4C illustrates the transport speed of the weighing conveyor and the collective conveyor device when the objects to be weighed are transferred from the weighing conveyor to the collective conveyor device.
- FIG. FIG. 5 is a schematic plan view of a combination weigher according to another configuration example of the embodiment of the present invention as viewed from above.
- FIG. 6A is a plan view of a modified combination weigher according to the embodiment of the present invention as seen from above, and
- FIG. 6B is a schematic diagram showing details of the weighing unit and the collective conveyor device of the combination weigher. is there.
- FIG. 1 is a diagram showing an outline of the appearance of a combination weigher according to an embodiment of the present invention.
- FIG. 1 (a) is a plan view of the combination weigher viewed from above, and
- FIG. 1 (b) is the same combination.
- FIG. 1C is a schematic view showing details of the weighing unit and the collective conveyor of the combination weigher.
- FIG. 2 is a block diagram showing a schematic configuration of a combination weigher of one configuration example of the embodiment of the present invention.
- This combination weigher includes a plurality of weighing units Cw1 to Cw12, a collective conveyor device 3, an operation setting indicator 4, a control device 5, and the like.
- Each of the plurality of weighing units Cw1 to Cw12 includes a weighing conveyor 1 constituted by a belt conveyor, a load cell that supports the weighing conveyor 1, and a weight sensor 2 that measures the weight of an object to be weighed on the weighing conveyor 1. It has.
- Each weighing conveyor 1 is provided with a pair of guide plates 11 so that an object to be weighed does not fall from both sides of the weighing conveyor 1. Specifically, for example, as shown in FIG. 1C, the guide plate 11 is attached to the conveyor frame 1F.
- a driving motor 1M for the weighing conveyor 1 is attached to the lower surface of the conveyor frame 1F of each weighing conveyor 1.
- the weight sensor 2 is fixed to a fixing member (not shown) in the apparatus main body 22, and a conveyor frame 1F is attached to the upper portion of the weight sensor 2 via an attachment member. That is, the weight sensor 2 supports the weighing conveyor 1 including the pair of guide plates 11 and the drive motor 1M.
- the weighing conveyor 1 and the weight sensor 2 are distinguished from each other, but an apparatus including both may be referred to as a weighing conveyor.
- a collective conveyor device 3 including two collective conveyors 3a and 3b is disposed.
- the six weighing conveyors 1 of the weighing units Cw1 to Cw6 are arranged in parallel on one side of the collective conveyor apparatus 3, and the respective conveyance directions (directions of arrows a) are the conveyance directions (arrows) of the collective conveyor apparatus 3. (direction c).
- the six weighing conveyors 1 of the weighing units Cw7 to Cw12 are arranged in parallel on the other side of the collective conveyor apparatus 3, and the respective conveyance directions (directions of arrows b) are the conveyance directions of the collective conveyor apparatus 3. It is arranged so as to be orthogonal to (the direction of the arrow c).
- the collective conveyor device 3 has two collective conveyors 3a and 3b made up of belt conveyors having endless flat belts, and the conveying surface thereof has a V-shaped cross section (reverse C-shaped). Are arranged in parallel so that The collective conveyors 3a and 3b are a type of transport conveyor, but here, the objects to be weighed discharged from the plurality of weighing conveyors 1 are collected and transported, and hence are called collective conveyors. These two collective conveyors 3a and 3b are set to have the same transport speed, and here, the direction of arrow c is the transport direction.
- the two collective conveyors 3a and 3b are arranged with a gap (predetermined interval) 3s, and a tray 13 for receiving and collecting dust falling from the gap 3s is placed below the gap 3s. .
- the tray 13 is pulled out, and the collected garbage can be discarded.
- the dimension h (see FIG. 4 (a)) of the gap 3s between the two conveyors 3a and 3b is, for example, about several mm, and the object to be weighed does not fall from the gap 3s, and the object to be weighed is sandwiched between the gaps 3s. The dimensions are small so that they do not.
- the angle ⁇ (see FIG. 4B) formed by the conveying surfaces of the two collective conveyors 3a and 3b is, for example, about 120 degrees. It is good also as a structure which can adjust this angle (theta).
- the collective conveyor device 3 conveys the objects to be weighed in the direction of the arrow c, and discharges the objects to be weighed from the conveyance end 3e (see FIG. 4A).
- a rear device (not shown) is installed on the direction side of the arrow c (the right side in FIG. 1B), and the objects to be weighed conveyed by the collective conveyor device 3 are discharged from the conveying end 3e. To the subsequent device.
- the apparatus main body 22 is mounted on the gantry 21, and the collective conveyor device 3 is mounted on the apparatus main body 22.
- the attachment support member and drive motor of the collective conveyors 3a and 3b are not illustrated.
- a support member 23 is attached to the side of the apparatus main body 22, and the operation setting display 4 is attached to the support member 23 via a support column 24.
- the apparatus main body unit 22 stores the conveyor drive circuit units 8a and 8b, the A / D conversion unit 9, the control unit 5, the I / O circuit unit 10 and the like shown in FIG.
- Each weighing conveyor 1 is supported by a weight sensor 2 such as a load cell.
- the weight sensor 2 measures the weight of an object to be weighed on the weighing conveyor 1, and the measured value (analog weight signal) is A /
- the signal is converted into a digital signal by the D conversion unit 9 and sent to the control unit 5.
- the control unit 5 is constituted by, for example, a microcontroller or the like, and includes an arithmetic control unit 6 including a CPU and a storage unit 7 including a memory such as a RAM and a ROM.
- the storage unit 7 stores an operation program, operation parameter data, measurement data, and the like.
- the combination unit, the weighing conveyor control unit, the collective conveyor control unit, the weight abnormality determination unit, and the appropriate amount determination unit are configured by the control unit 5.
- the control unit 5 may be configured by a single control device that performs centralized control, or may be configured by a plurality of control devices that perform distributed control in cooperation with each other.
- the control unit 5 executes the operation program stored in the storage unit 7 by the arithmetic control unit 6 so as to control the entire combination weigher and perform combination processing described later. For example, a measured value measured by the weight sensor 2 to which each weighing conveyor 1 is attached is acquired as a digital value through the A / D conversion unit 9 as needed, and stored in the storage unit 7 if necessary. Further, the driving operation of each weighing conveyor 1 is controlled via the conveyor driving circuit unit 8a, and the driving operation of the collective conveyors 3a and 3b is controlled via the conveyor driving circuit unit 8b. Further, a discharge command signal is input from a subsequent apparatus (not shown) via the I / O circuit unit 10 and a discharge completion signal is output to the subsequent apparatus. In addition, a signal is input from the operation setting display 4 and a signal such as data to be displayed on the operation setting display 4 is output.
- the combination process by the control unit 5 will be described.
- combination calculation is performed based on the weight of the objects to be weighed on each weighing conveyor 1 obtained from the measured values of the respective weight sensors 2, and the total weight of the objects to be weighed (combined weight) is the target. All combinations of the weighing conveyors 1 within the weight range (allowable range with respect to the combination target weight) are obtained, and one combination is determined as the discharge combination.
- the combination having the smallest absolute value of the difference between the combination weight and the combination target weight is determined as the discharge combination.
- the objects to be weighed on the weighing conveyor 1 selected as the discharge combination are conveyed by the weighing conveyor 1 selected as the discharge combination and discharged onto the collective conveyor device 3.
- the operation setting display 4 includes, for example, a touch screen display (display device), and on the screen of this display, operations such as start and stop of the combination weigher can be performed, operation parameters can be set, and the like.
- the result (combination weight, etc.) of the combination process by the control unit 5 can be displayed on the display screen.
- FIG. 3 is a flowchart showing an example of the operation of the combination weigher of one configuration example of the present embodiment.
- the operation of this combination weigher is realized by the processing of the control unit 5. It should be noted that all information necessary for controlling the operation of the combination weigher is stored in the storage unit 7.
- the objects to be weighed are, for example, agricultural products.
- the objects to be weighed are rod-shaped or elongated shapes such as asparagus and eringi.
- the worker performs an operation of supplying (loading) the objects to be weighed one by one to the weighing conveyor 1 on which the objects to be weighed are not loaded when the conveyance is stopped.
- the objects to be weighed are supplied to the weighing conveyor 1 so that the longitudinal direction thereof is the same direction (including substantially the same direction) as the conveying direction (direction of arrow a) of the weighing conveyor 1 (for example, FIG. a)).
- the control unit 5 acquires the measurement value of each weight sensor 2 from the A / D conversion unit 9 at regular time intervals, and the object to be weighed is supplied based on the measurement value of the weight sensor 2.
- the weighing conveyor 1 is recognized and the weight value of the object to be weighed is recognized.
- the weighing value is compared with a preset loading detection reference value (for example, 6 g), and if the weighing value is equal to or more than the loading detection reference value. It is determined that the object to be weighed is supplied, and if it is less than the loading detection reference value, it is determined that the object to be weighed is not supplied.
- the loading detection reference value is set in advance in the control unit 5 and stored in the storage unit 7.
- step S3 the weighing conveyor 1 selected as the discharge combination is driven for a first predetermined time to supply the objects to be weighed on the weighing conveyor 1 to the collective conveyor apparatus 3, and the collective conveyor apparatus 3 Is driven for a second predetermined time to convey the object to be weighed supplied from the weighing conveyor 1 to the subsequent apparatus. Then, a discharge completion signal is output to the subsequent apparatus at a predetermined timing (step S4). The above operation is repeated.
- the weighing conveyor 1 and the collective conveyor apparatus 3 selected as the discharge combination are started to be driven (conveying operation) at the same time, for example, and the objects to be weighed discharged from the conveying end 1e (see FIG. 4) of the weighing conveyor 1 Is supplied to the collective conveyor apparatus 3 in the conveying operation state. Further, the transport speed (V2) of the collective conveyor device 3 (collective conveyors 3a, 3b) is set in advance to be higher than the transport speed (V1) of the weighing conveyor 1.
- FIG. 4A is a schematic diagram showing a moving state when an object to be weighed is transferred from one weighing conveyor 1 to the collective conveyor apparatus 3, and FIG. It is a figure which shows the cross section of the state (state of the position P4 of Fig.4 (a)) when transferring to a complete transfer.
- the object to be weighed moves in the order of positions P1, P2, P3, and P4.
- the object to be weighed at the position P1 when the weighing conveyor 1 is stopped is transferred in the direction of the arrow a when the weighing conveyor 1 is driven to reach the position P2, and the leading portion of the object to be weighed (progress)
- the tip portion in the direction contacts the collective conveyor 3a.
- the rear portion of the object to be weighed is transferred by the weighing conveyor 1 in the direction of arrow a, and at the same time, the leading portion thereof is dragged in the transfer direction of the collective conveyor device 3 (direction of arrow c), thereby the position P3.
- FIG. 4C is a diagram for explaining the conveyance speeds of the weighing conveyor 1 and the collective conveyor device 3 when the objects to be weighed transfer from the weighing conveyor 1 to the collective conveyor device 3.
- the length e in the longitudinal direction of the object to be weighed 41 schematically shown by the solid line is L
- the tip (leading portion) 41 f of the object to be weighed 41 is the transport end of the weighing conveyor 1.
- the rear end 41r of the object to be weighed 41 is in a state immediately before dropping from the weighing conveyor 1 (state indicated by a chain line) from the state in which the object to be weighed 41 is indicated by a solid line.
- the distance by which the rear end 41r of the object to be weighed 41 is transferred in the direction of arrow a by the weighing conveyor 1 for t seconds is V1 ⁇ t.
- V2 ⁇ t L ⁇ (1 ⁇ k 2 ) (2)
- V2 / V1 1 and V2> V1.
- the object to be weighed 41 considers only the state of the solid line and the state of the chain line shown in FIG. 4C and does not consider the state in the middle of the transition, but at least V2> V1.
- the direction (longitudinal direction) of the objects to be weighed 41 can be easily changed from the transport direction (arrow a direction) of the weighing conveyor 1 to the transport direction (arrow c direction) of the collective conveyor device 3. is there.
- the subsequent apparatus is configured to output a discharge command signal to the combination weigher at a predetermined timing, and start a predetermined operation when a discharge completion signal is input from the combination weigher.
- an apparatus intermittently horizontally moves a plurality of trays (shallow boxes) by connecting a plurality of trays (shallow boxes) may be used as the rear stage apparatus.
- the objects to be weighed discharged from the collective conveyor device 3 are supplied to the tray of the intermittent conveyance device.
- the objects to be weighed supplied to each tray are further packed in one pack by the next stage apparatus or operator.
- the intermittent transfer device outputs a discharge command signal to the combination weigher and inputs a discharge completion signal from the combination weigher. Then, the tray is moved after a predetermined time has elapsed, and the next empty tray is moved to the discharge port of the collective conveyor apparatus 3.
- the bag-feeding type packaging machine for bagging a to-be-measured item may be arrange
- each weighing conveyor 1 selected as the discharge combination is driven simultaneously to discharge the objects to be weighed to the collective conveyor device 3, but this is not restrictive.
- the driving start timing of each weighing conveyor 1 selected for the discharging combination may be determined as needed so that the objects to be weighed discharged from each weighing conveyor 1 overlap on the collective conveyor device 3. .
- a rod-shaped or elongated object to be weighed is supplied to each weighing conveyor 1 so that the longitudinal direction of the object to be weighed is the same direction (including substantially the same direction) as the conveying direction of the weighing conveyor 1, for example. Since the conveying speed V2 of the collective conveyor device 3 is set to a speed higher than the conveying speed V1 of the weighing conveyor 1, the direction of the objects to be weighed discharged from the weighing conveyor 1 in the longitudinal direction is set. It can be smoothly changed in the same direction as the transport direction of the collective conveyor device 3.
- the longitudinal direction of the objects to be weighed discharged from each weighing conveyor 1 can be aligned in the same direction as the conveying direction of the collective conveyor apparatus 3 and discharged from the conveying end of the collective conveyor apparatus 3 to the subsequent apparatus.
- the two conveyors 3a and 3b arranged in a V-shaped cross section are used as the collective conveyor device 3, the objects to be weighed lie on the bottom portions of the V-shaped cross sections of the two collective conveyors 3a and 3b.
- the objects to be weighed discharged from the respective weighing conveyors 1 can be discharged with their longitudinal directions aligned in the same direction as the conveying direction of the collective conveyor device 3.
- the weighing conveyor 1 is used for each of the plurality of weighing units Cw1 to Cw12 for weighing the object to be weighed, and one end of the weighing conveyor 1 (for example, the conveyance end 1e in FIG. 4A). Since the objects to be weighed are collected from the collecting conveyor device 3 and discharged to the subsequent device, the level difference between the weighing conveyor 1 and the collecting conveyor device 3 can be reduced, and the weighing conveyor selected as the discharge combination. The impact when the objects to be weighed discharged from 1 are transferred onto the collective conveyor device 3 is reduced. Therefore, even an object to be weighed that is easily broken or damaged by an impact when dropped can be measured without being damaged.
- each weighing conveyor 1 and the collective conveyor device 3 are arranged so that their conveying directions are orthogonal to each other.
- the conveying direction of the weighing conveyor 1 (indicated by arrows a and b).
- Direction) and the conveying direction (direction of arrow c) of the collective conveyor device 3 may be arranged such that the angles ⁇ 1 and ⁇ 2 are less than 90 degrees.
- FIG. 5 is a schematic plan view of a combination weigher according to another configuration example of the present embodiment as viewed from above. In this configuration, the angle for changing the direction of the objects to be weighed can be smaller than 90 degrees, so that the direction of the objects to be weighed discharged from the weighing conveyor 1 is the same as the conveying direction of the collective conveyor device 3. It can be easily changed.
- FIG. 6 (a) is a plan view of a combination weigher according to a modification of the embodiment of the present invention as seen from above
- FIG. 6 (b) is a schematic diagram showing details of the weighing unit and the collective conveyor device of the combination weigher. Parts corresponding to those in FIGS. 1A to 1C are denoted by the same reference numerals.
- the collective conveyor device is constituted by one collective conveyor 30 composed of a belt conveyor.
- the collective conveyor 30 is also a type of transport conveyor.
- the collective conveyor 30 has both edge portions (both ends in the width direction of the belt) 30a and 30b of the upper surface portion (conveying surface) of the rotating belt-shaped belt as support brackets (see FIG. 6B). (Not shown), and a trough type belt conveyor that conveys an object to be weighed in a state in which the central portion 30c is recessed from both edge portions 30a and 30b of the upper surface portion.
- the transport speed of the collective conveyor 30 is set to be higher than the transport speed of the weighing conveyor 1, so that The objects to be weighed can be discharged to the subsequent apparatus with the direction aligned with the conveying direction of the collective conveyor device 3.
- the objects to be weighed discharged from the weighing conveyors 1 on both sides can be collected in the approximate center and discharged to the subsequent apparatus, so that the objects to be weighed can be accurately supplied to the latter apparatus.
- the object to be weighed when the latter apparatus is a packaging machine, the object to be weighed can be put so as not to protrude from the bag, and when the latter apparatus is the above-mentioned intermittent conveying apparatus, the object to be weighed can be prevented from protruding from the tray. Can be put.
- the collective conveyor device may be constituted by one belt conveyor. The same applies to the case of the configuration shown in FIG.
- the object to be weighed lies on the bottom portion of the V-shaped cross section when the collective conveyor apparatus 3 having the V-shaped cross section described above is used rather than the collective conveyor apparatus configured by one belt conveyor. (The state at the position P4 in FIGS. 4A and 4B), the longitudinal direction of the objects to be weighed is surely aligned, and the objects to be weighed are in the width direction of the collective conveyor device 3 (perpendicular to the conveying direction). Rolling direction).
- the weighing conveyor 1 can be used even if the conveying speed of the collecting conveyor device 3 is not faster than the conveying speed of the weighing conveyor device 1 by using the collecting conveyor device 3 having a V-shaped cross section.
- the objects to be weighed discharged from the floor lie on the bottoms of the V-shaped cross sections of the two collective conveyors 3a and 3b, so that the longitudinal direction of the objects to be weighed is the same as the transport direction of the collective conveyor device 3 Therefore, it is possible to discharge the objects to be weighed discharged from the weighing conveyors 1 in the same direction as the conveying direction of the collective conveyor device 3.
- the collective conveyor apparatus 3 may have a weighing function.
- two weight sensors for example, load cells
- weight sensors for example, load cells
- weight sensors for example, load cells
- the control part 5 is the weight (weight measured by a weight sensor) of the to-be-measured object on the collective conveyor apparatus 3 discharged
- a weight abnormality signal is output to the subsequent apparatus.
- the latter-stage apparatus is configured to exclude the objects to be weighed outside the target weight range from the production line when the weight abnormality signal is input. By configuring in this way, for example, when dust or the like adheres to the object to be weighed, the dust or the like falls from the gap 3s between the collective conveyors 3a and 3b, and the weight of the object to be weighed becomes light. It is possible to prevent the objects to be weighed out of the range from being shipped.
- the control unit 5 determines whether or not the weight of the objects to be weighed placed on each weighing conveyor 1 is within a predetermined appropriate amount range, and the objects to be weighed that are not within the appropriate amount range are excluded. May be.
- the upper limit value and the lower limit value of the appropriate amount range are set in advance in the control unit 5 and stored in the storage unit 7.
- the control unit 5 determines that the weight of the weighing object on each weighing conveyor 1 obtained as the measured value of each weight sensor 2 is an appropriate amount.
- the weighing conveyor 1 transports the object to be weighed for a predetermined time in the direction opposite to the normal transport direction (directions of arrows a and b) (
- the object to be weighed is discharged to the collection container 12 (see, for example, FIG. 6).
- the collection container 12 receives the objects to be weighed that are discharged when the weighing conveyor 1 of each weighing unit Cw1 to Cw12 reversely conveys the objects to be weighed. It is provided on the opposite side.
- the weighing conveyor 1 to which the object to be weighed that is not within the appropriate amount range is not subjected to the combination process and is not selected as the discharge combination. It is discharged into the collection container 12. Therefore, when placing an object to be weighed one by one on each weighing conveyor 1, a combination consisting only of objects to be weighed can be discharged.
- the weighing conveyor 1 on which the objects to be weighed that are not within the appropriate amount range are maintained in a driving stop state, and a notification means for notifying the operator of the weighing conveyor 1 may be provided.
- this notification means for example, one indicator lamp corresponding to each weighing conveyor 1 is provided, and by the control of the control unit 5, it corresponds to the weighing conveyor 1 on which an object to be weighed that is not within an appropriate amount range is placed.
- the length of the collective conveyor device 3 can be shortened and the discharge time of the objects to be weighed can be shortened.
- the combination weigher can be made compact, and the operator can easily perform the operation of supplying the objects to be weighed.
- the combination process is performed when a discharge command signal is input from the subsequent apparatus, but the present invention is not limited to this.
- the weighing conveyor 1 and the collective conveyor device 3 selected as the discharge combination are driven to discharge the objects to be measured to the subsequent apparatus. You may make it do.
- the time required for the combination process is about 10 ms, and even if the combination process is performed after the discharge command signal is input as in this embodiment, the actual measurement cycle is hardly affected.
- the combination processing is performed after the discharge command signal is input as in this embodiment, the number of measurement values used for the combination calculation can be increased, and the combination weighing accuracy can be improved. it can.
- the collective conveyor device 3 may be always driven. If the motor for driving the conveyor is not driven, power is not consumed. However, since extra power is consumed when the motor is started, it is preferable to drive the motor so as to reduce power consumption as a whole.
- the drive motor 1M is attached to the lower surface of the conveyor frame 1F of the weighing conveyor 1 so that each weight sensor 2 supports the weighing conveyor 1 including the drive motor 1M. You may comprise so that the measurement conveyor 1 except the drive motor 1M may be supported. In this case, the drive motor 1M is attached to a separate member that is not supported by the weight sensor 2. For example, the rotational force of the driving motor 1M is transmitted to the driving roller of the weighing conveyor 1 only when the connecting mechanism between the driving motor 1M and the driving roller of the weighing conveyor 1 is driven (when the object to be weighed is transported).
- the drive motor 1M is physically separated from the drive roller of the weighing conveyor 1 so that the load from the drive motor 1M is not applied to the weight sensor 2.
- the weight sensor 2 is configured to measure the weight of an object to be weighed on the weighing conveyor 1 when the weighing conveyor 1 is in a driving stop state. You may comprise as mentioned above.
- the object to be weighed is supplied to the weighing conveyor 1 manually (by an operator), but the object to be weighed is supplied to the weighing conveyor 1 without damaging the object to be weighed.
- the supply device may be configured to supply automatically.
- the present invention is useful as a combination weigher or the like that does not damage even an object to be weighed that is fragile or easily damaged by an impact when dropped.
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Abstract
Description
本発明の上記目的、他の目的、特徴、及び利点は、添付図面参照の下、以下の好適な実施態様の詳細な説明から明らかにされる。
図1は本発明の実施形態の一構成例の組合せ秤の外観の概略を示す図であり、図1(a)は同組合せ秤を上から見た平面図、図1(b)は同組合せ秤の正面図、図1(c)は同組合せ秤の計量部及び集合コンベアの詳細を示す模式図である。図2は本発明の実施形態の一構成例の組合せ秤の概略構成を示すブロック図である。
f=k×L=kL(0<k<1)
と示すことができる。
また、t秒間に被計量物41の先端41fが矢印c方向に移動した距離gは、次のようになる(以下では、例えば、√xは、xの正の平方根を示すものとして表記する)。
この被計量物41の先端41fが矢印c方向に移動した距離gを、集合コンベア装置3によってt秒間に矢印c方向に移送される距離(V2×t)として考えれば、次の(2)式が得られる。
上記の(1)式及び(2)式を用いてV2/V1を算出すると、次のようになる。
=√(1+k)/√(1-k)
ここで、0<k<1であるので、V2/V1>1となり、V2>V1となる。
2 重量センサ
3 集合コンベア装置
3a、3b、30 集合コンベア
4 操作設定表示器
5 制御部
Claims (8)
- 供給される被計量物を一方向へ搬送して排出する集合コンベア装置と、
各々、搬送停止状態のときに被計量物が供給され、供給された被計量物を第1の方向へ搬送して一端から排出することにより搬送動作状態の前記集合コンベア装置へ被計量物を供給し、前記集合コンベア装置の搬送方向に並んで配設された複数の計量コンベアと、
各々、前記計量コンベアに対応して設けられ、前記計量コンベア上に供給されている被計量物の重量を計量する複数の重量センサと、
前記重量センサの計量値に基づいて、供給されている被計量物の重量の合計が目標重量範囲内となる前記計量コンベアの組合せからなる排出組合せを1つ求める組合せ手段と、
前記排出組合せに選択されている計量コンベアを駆動させて前記計量コンベア上の被計量物を第1の方向へ搬送して前記計量コンベアの一端から排出させる計量コンベア制御手段とを備え、
前記集合コンベア装置の搬送速度が前記計量コンベアの搬送速度よりも速いように構成された、組合せ秤。 - 前記集合コンベア装置は、無端の平ベルトを有する2つのベルトコンベアを搬送面が断面V字状となるように並行に配設されてなる、請求項1に記載の組合せ秤。
- 無端の平ベルトを有する2つのベルトコンベアを搬送面が断面V字状となるように並行に配設されてなり、供給される被計量物を一方向へ搬送して排出する集合コンベア装置と、
各々、搬送停止状態のときに被計量物が供給され、供給された被計量物を第1の方向へ搬送して搬送端から排出することにより搬送動作状態の前記集合コンベア装置へ被計量物を供給し、前記集合コンベア装置の搬送方向に並んで配設された複数の計量コンベアと、
各々、前記計量コンベアに対応して設けられ、前記計量コンベア上に供給されている被計量物の重量を計量する複数の重量センサと、
前記重量センサの計量値に基づいて、供給されている被計量物の重量の合計が目標重量範囲内となる前記計量コンベアの組合せからなる排出組合せを1つ求める組合せ手段と、
前記排出組合せに選択されている計量コンベアを駆動させて前記計量コンベア上の被計量物を第1の方向へ搬送して前記計量コンベアの一端から排出させる計量コンベア制御手段とを備えた、組合せ秤。 - 前記2つのベルトコンベアは隙間をあけて配置され、かつ前記隙間は、前記2つのベルトコンベア上の被計量物が落下することなく、かつ被計量物が挟まることのない寸法にしてある、請求項2または3に記載の組合せ秤。
- 前記集合コンベア装置で搬送される被計量物の重量を計量する計量手段と、
前記排出組合せに選択されている全ての前記計量コンベアから前記集合コンベア装置へ被計量物が排出されたときに前記計量手段で計量される被計量物の重量が前記目標重量範囲内であるか否かを判定し、前記目標重量範囲内ではない場合には重量異常信号を後段装置へ出力する重量異常判定手段とをさらに備えた、請求項4に記載の組合せ秤。 - 前記複数の計量コンベアによって、前記集合コンベア装置を間に挟んで配置される第1及び第2の計量コンベア群が構成され、
前記第1及び第2の計量コンベア群の各々は、各々を構成する前記計量コンベアが並行に配置され、
前記第1及び第2の計量コンベア群の各々の前記計量コンベアは、前記一端側に前記集合コンベア装置が位置し、前記集合コンベア装置と搬送方向が直交するように配置された、請求項1~3のいずれかに記載の組合せ秤。 - 前記複数の計量コンベアによって、前記集合コンベア装置を間に挟んで配置される第1及び第2の計量コンベア群が構成され、
前記第1及び第2の計量コンベア群の各々は、各々を構成する前記計量コンベアが並行に配置され、
前記第1及び第2の計量コンベア群の各々の前記計量コンベアは、前記一端側に前記集合コンベア装置が位置し、前記計量コンベアの搬送方向が前記集合コンベア装置の搬送方向に対して90度未満の角度をなすように配置された、請求項1~3のいずれかに記載の組合せ秤。 - 前記重量センサの計量値に基づいて、各々の前記計量コンベアに供給されている被計量物の重量が適量範囲内であるか否かを判定する適量判定手段をさらに備え、
前記計量コンベア制御手段は、
前記適量判定手段による判定結果に基づいて前記適量範囲内ではない重量の被計量物が供給されている前記計量コンベアを前記第1の方向とは逆方向に被計量物を搬送させるように駆動して前記計量コンベアの他端から被計量物を排出させるように構成された、請求項1~3のいずれかに記載の組合せ秤。
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US20140083816A1 (en) | 2014-03-27 |
CA2828850C (en) | 2016-08-02 |
JP5800544B2 (ja) | 2015-10-28 |
KR20130114216A (ko) | 2013-10-16 |
KR101431410B1 (ko) | 2014-08-19 |
EP2693175A4 (en) | 2014-10-01 |
CA2828850A1 (en) | 2012-10-04 |
MX2013010370A (es) | 2013-10-30 |
EP2693175A1 (en) | 2014-02-05 |
CN103328942A (zh) | 2013-09-25 |
EP2693175B1 (en) | 2018-09-19 |
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