JP2007121224A - Combination weighing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combination weighing device capable of combination-weighing efficiently a small amount of weighed object having a depositing or sticking property. <P>SOLUTION: The device includes a metering part 2, a conveying part 3 for supply , a supply part 4, a discharge part 5, a control part 11, and a supply dimension regulating means 24 for aligning the respective weighed objects P conveyed on a plurality of supply belt conveyers 13 along a conveying direction A, and for regulating a width dimension and a height dimension orthogonal to the conveying direction A. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a combination weighing device that selects a combination within a set weight range from a combination of objects to be weighed by a plurality of weighing units, and collects and discharges the selected objects to be measured. The present invention relates to a combination weighing device suitable for combination weighing of a small amount of objects to be weighed or sticky.

  Conventionally, a combination weighing device that selects a combination within a set weight range from combinations of objects to be weighed by a plurality of weighing units and collects and discharges the selected objects to be weighed (for example, , See Patent Document 1).

Japanese Patent Laid-Open No. 10-325752

  However, in conventional combination weighing devices, sticky or sticky like meat such as cut sausages, cooked vegetables such as boiled and cut mushrooms and onions, peeled clams, cut vegetables, pickles, muscles, etc. There is a problem that a small amount of combination weighing, for example, set to about 40 grams, cannot be efficiently performed.

  For example, the objects to be weighed for performing a small amount of combination weighing are small in size because the weight is less than the set weight, and the objects to be weighed easily overlap with each other when transported on the belt conveyor. At the same time, it tends to agglomerate due to its own adhesion or stickiness, and the weight of the object to be weighed by one weighing unit tends to be heavy, so it is possible to supply the object to be weighed to the weighing unit little by little. It is difficult and the efficiency of combination weighing is not good.

  Therefore, there is a need for a combination weighing device that can efficiently perform a small amount of combination weighing of objects to be weighed or sticky.

  In order to achieve the above-described object, the feature of the combination weighing device according to the present invention is that a weighing unit including a plurality of weighing heads arranged in a direction orthogonal to a direction in which an object to be weighed is supplied; A plurality of supply belt conveyors for supplying the objects to be weighed to each of the plurality of measurement heads, and a plurality of supply belt conveyors A supply unit having the same number of supply troughs as the plurality of supply belt conveyors for supplying a weighing object, and a discharge belt conveyor for collecting and discharging the objects to be weighed supplied to the plurality of measurement heads A discharge unit that controls the operation of each unit, and the control unit variously combines the measurement values of the respective objects to be weighed supplied to the plurality of measurement heads. In the combination weighing device configured to select a combination in which the total weight of the combinations is within the allowable range of the set weight, and to collect and discharge the selected objects to be collected by the discharge unit, the plurality of supply belts Each of the objects to be weighed conveyed on the conveyor is arranged in the conveying direction, and supply dimension regulating means for regulating the width dimension and the height dimension orthogonal to the conveying direction is provided.

  The supply dimension regulating means is arranged in parallel to the transport direction of the object to be weighed so as to be in contact with the object to be transported on the supply belt conveyor, and is fed by the driving force of the swing drive actuator. A pair of mutually parallel width regulating guides that are reciprocated in a direction orthogonal to the conveying direction of the weighing object, and the object to be weighed by the driving force of the blade rotation driving actuator, arranged so as to face the supply belt conveyor. It is preferable that the rotation trajectory by the tip of the rotary blade is disposed inside the pair of width regulation guides. A pair of width restricting guides of the supply dimension restricting means are provided below each of the plurality of supply troughs of the supply part, and the entire supply part is covered by the driving means. It is preferable that the reciprocatingly movably formed in the direction orthogonal to the conveying direction of the amount thereof.

  It is preferable that the supply belt conveyor is formed to be intermittently driven, and the discharge unit further includes a collection belt conveyor for collecting the objects to be weighed that have reached the plurality of weighing heads. And the control unit collects the objects to be weighed by the collecting belt conveyor when the objects to be weighed that have reached the plurality of weighing heads are held on the weighing head for a preset time. It is preferable to be formed.

  According to the combination weighing device of the present invention, the objects to be weighed when being supplied to the weighing unit by the supply dimension regulating means are aligned in the conveyance direction on the supply belt conveyor, and the width dimension orthogonal to the conveyance direction and It is easy to regulate the height dimension. As a result, since the objects to be weighed can be supplied to the weighing unit little by little, it is possible to efficiently perform a small amount of combination weighing of objects to be weighed having adhesion or stickiness.

  The present invention will be described below with reference to embodiments shown in the drawings.

  1 to 4 show an embodiment of a combination weighing device according to the present invention. FIG. 1 is a schematic front view of the main part, FIG. 2 is a schematic side view of the main part of FIG. FIG. 4 is a schematic plan view of the main part of FIG. 1, and FIG. 4 is a block diagram showing the structure of the main part of the control part.

  As shown in FIGS. 1 to 3, the combination weighing device 1 according to the present embodiment includes a weighing unit 2, a supply transport unit 3, a supply unit 4, and a discharge unit 5. A specific example of the combination weighing device 1 is shown in FIG. As shown in FIG. 5, the combination weighing device 1 includes a main frame 6 to which the weighing unit 2, the supply transport unit 3, the supply unit 4, the discharge unit 5, and the like are attached. An operation panel 7 is attached to the main frame 6.

  The weighing unit 2 is to be weighed such as meats such as cut sausages, cooked vegetables such as boiled and cut mushrooms and onions, peeled clams, cut vegetables, pickles and muscles. For weighing the object P, the apparatus includes a plurality of weighing heads 8 arranged in the horizontal direction shown in the left-right direction in FIG. 1 orthogonal to the direction in which the object P is supplied. These weighing heads 8 are provided with a weighing pan 9 formed in a flat plate shape with a flat upper surface, and are formed so as to measure the weight of the object P supplied to the weighing pan 9.

  Each weighing pan 9 is connected to a load cell 10 (FIG. 4) disposed inside the weighing head 8. The weight of the object P to be weighed supplied to the upper surface of each weighing pan 9 is passed through the load cell 10. It is formed so that it can be used and measured. Each load cell 10 is electrically connected to the control unit 11 shown in FIG. 4, and can send the respective weight data of the objects to be weighed P supplied to each weighing pan 9 to the control unit 11. It is like that.

  Each load cell 10 is also formed to function as a sensor that determines whether or not the object P is supplied to the weighing pan 9. That is, each load cell 10 sends weight data with a measured value of “zero or almost zero” to the control unit 11 when the object P is not supplied to the weighing pan 9. No. 11 can determine whether or not the weighing object P is supplied to the weighing pan 9.

  A specific example of the measuring unit 2 is shown in FIG. As shown in FIG. 6, the weighing unit 2 is arranged with each weighing head 8 attached to the upper surface of the head mounting frame 12. The head mounting frame 12 is formed in a square frame shape as a whole, and is mounted at a predetermined position on the main frame 6 so that the height position of the upper surface of each weighing pan 9 can be adjusted. (FIG. 5).

  The supply transport unit 3 is for supplying the objects to be weighed P to each of the plurality of measuring heads 8, and includes the same number of supply belt conveyors 13 as the plurality of measuring heads 8. These supply belt conveyors 13 supply the objects to be weighed P supplied from the supply unit 4 along the conveyance direction indicated by the arrow A in FIG. It is formed to be able to. The supply belt conveyors 13 are arranged in parallel so as to extend in parallel to each other. Accordingly, each weighing head 8 is arranged in a direction orthogonal to the direction in which the object P is supplied.

  The supply belt 13a of each of the supply belt conveyors 13 is formed so as to be intermittently driven individually at a pitch of, for example, about 10 mm by the drive force of the supply belt drive motor 14 (FIG. 4). Each supply belt drive motor 14 is electrically connected to the control unit 11, and the object to be weighed P is not supplied to the weighing pan 9 by a control command sent from the control unit 11. The feeding belt 13a is in a driving state in which the feeding belt 13a is intermittently driven, and the feeding belt 13a is held in a stopped state when the object P is fed to the weighing pan 9.

  A specific example of the supply belt conveyor 13 is shown in FIG. In addition, in the front-end | tip part (left side of FIG. 7) of the supply belt conveyor 13 shown in FIG. 7, when the to-be-measured item P is supplied to the weighing pan 9, the to-be-measured item P falls outside from the supply belt 13a. A drop-off prevention guide 15 is provided to prevent this. The supply belt conveyor 13 is attached to the main frame 6 so as to extend in parallel to each other.

  The supply unit 4 is for supplying the objects to be weighed P to each of the plurality of supply belt conveyors 13 manually or by a supply mechanism (not shown), and the same number of supply troughs as the plurality of supply belt conveyors 13. 16 is provided. These supply troughs 16 are formed in a planar rectangular shape having a long vertical direction shown in the vertical direction in FIG. Further, the lateral width dimension of each supply trough 16 shown in the left-right direction in FIG. 3 is formed to be narrower than the width of the supply belt 13 a of the supply belt conveyor 13 and above the supply belt 13 a of the supply belt conveyor 13. Is arranged. Further, as shown in FIG. 1, both side plates forming the long side shown in the vertical direction of FIG. 3 of the supply trough 16 are inclined surfaces that become narrower toward each other as they approach the supply belt conveyor 13. Furthermore, the supply troughs 16 are arranged in a direction perpendicular to the direction in which the object P is supplied and are attached to the trough frame 17 (FIG. 3). The upper side of each supply trough 16 in FIG. 3 is a supply position SS to which the object to be weighed P is supplied.

  At the bottom of each supply trough 16, a pair of width regulating guides 18 formed in a substantially flat plate shape are disposed. The pair of width regulating guides 18 are arranged so that the thickness direction thereof extends in parallel along the arrangement direction of the supply troughs 16. The pair of width regulation guides 18 have a slight gap between the lower end of the supply belt conveyor 13 and the upper surface of the supply belt 13a so that the object P to be measured can be brought into contact with the supply object P. It is arranged to have. Furthermore, the pair of width restricting guides 18 have bottom ends of the supply trough 16 such that the tips shown in the lower part of FIG. 3 (rightward in FIG. 2) protrude from the supply trough 16 toward the measuring head 8. It is formed so as to be connected to each long side of the opening.

  The supply unit 4 of the present embodiment is formed so as to reciprocate along the arrangement direction of the supply troughs 16 indicated by arrows B in FIG. 3 by the driving force of the swing drive motor 19 as a swing drive actuator. Yes.

  That is, the supply part 4 of this embodiment is formed so that it can reciprocate in the direction orthogonal to the conveyance direction of the to-be-measured object P with each width regulation guide 18. As shown in FIG.

  It is important that the stroke for reciprocating the supply unit 4 does not exceed the width of the supply belt 13a of the supply belt conveyor 13. In addition, each width regulation guide 18 may be provided separately from the supply unit 4.

  Accordingly, each width regulation guide 18 reciprocates the supply unit 4 to align the objects to be weighed P conveyed on the plurality of supply belt conveyors 13 in the conveyance direction and to the conveyance direction. Thus, the width dimension orthogonal to each other can be regulated.

  The oscillating drive motor 19 is electrically connected to the control unit 11, and can selectively switch between a reciprocating movement state and a stopped state of the supply unit 4 according to a control command sent from the control unit 11. It is formed as follows.

  The period of reciprocation of the supply unit 4 by the swing drive motor 19 may be set according to the needs of the type of the object to be weighed P, device specifications, design concept, and the like.

  A specific example of the supply unit 4 including the width regulating guide 18 is shown in FIG. Further, the positional relationship between the supply transport unit 3 and the supply unit 4 is shown in FIGS. As shown in FIG. 9, a reinforcing plate 20 that serves to prevent deformation and reinforce each width regulating guide 18 is arranged at the upper end of each width regulating guide 18 protruding from the supply trough 16 with respect to the arrangement direction. And are attached so as to extend in a direction orthogonal to each other. Furthermore, the supply part 4 is attached to the main frame 6 so that it can reciprocate along the longitudinal direction.

  Inside each supply trough 16, that is, inside the pair of width regulating guides 18, the rotary blades 21 are arranged so as to face the supply belt conveyor 13. The rotary blade 21 is attached to a rotary shaft 22 extending in parallel along the arrangement direction of the supply troughs 16, and a blade rotation drive motor 23 (FIG. 4) using the rotary shaft 22 as a blade rotation drive actuator. ) Is rotated by the driving force of FIG. 2 so as to face the conveying direction of the object P indicated by the arrow C in FIG. Arranged inside the pair of width regulating guides 18. Further, the rotation locus by the tip of the rotary blade 21 is formed so as to pass a predetermined height position above the supply belt 13 a of the supply belt conveyor 13.

  Therefore, each rotary blade 21 is formed so as to be able to regulate the respective height dimensions of the objects P to be transported on the plurality of supply belt conveyors 13 by rotationally driving the rotary shaft 22. ing.

  The rotating blades 21 may be disposed on the tip side of the width regulating guide 18 protruding from the supply unit 4. The rotating shaft 22 is supported so as to be rotatable separately from the supply unit 4. Further, the rotational speed, shape, and the like of the rotary blade 21 may be set as necessary according to the type of the object to be weighed P, the specifications of the apparatus, the design concept, and the like.

  A specific example of the rotary blade 21 is shown in FIG. The rotary blade 21 is attached to the main frame 6 with the rotary shaft 22 being rotatable.

  The width regulating guides 18 and the rotary blades 21 align the objects to be weighed P conveyed on the plurality of supply belt conveyors 13 of the present embodiment in the conveying direction and are orthogonal to the conveying direction. Supply dimension regulating means 24 for regulating the width dimension and the height dimension is formed.

  The discharge unit 5 is for collecting and discharging the objects to be weighed P supplied to the plurality of weighing heads 8, and a pair of left and right collecting belt conveyors 25 for collecting the objects to be weighed, and for collecting these objects And a discharging belt conveyor 26 disposed below the belt conveyor 25. Further, the discharge unit 5 has the same number of take-out sliders 27 as the respective take-out plates 9 for taking out the objects to be weighed P supplied to the respective take-out plates 9 and the respective take-out sliders 27 to measure each. The same number of storage hoppers 28 as the take-out sliders 27 for temporarily storing the objects to be weighed P taken out from the tray 9, and the recovery belt for recovering the objects to be weighed P supplied to each weighing pan 9. A conveyor 29 is provided.

  The pair of collecting belt conveyors 25 are arranged in a straight line along the arrangement direction of the weighing pans 9 as shown in FIG. Between the pair of collective belt conveyors 25, a gap is provided in which the object to be weighed P can drop. Then, on one collecting belt conveyor 25 shown on the right side of FIG. 3, a combination-weighed object P transferred from the weighing pan 9 in the right half of FIG. The other assembly belt conveyor 25 shown on the left side of FIG. 3 is to be weighed in combination weighing that is transferred from the weighing pan 9 in the left half of FIG. The object P is formed so as to be placed thereon. Further, each collecting belt conveyor 25 can convey the placed objects to be weighed P toward the central portion in the arrangement direction of the pair of collecting belt conveyors 25, and the collecting belt on the right side in FIG. The collective belt 25a of the conveyor 25 is allowed to run toward the left side indicated by arrow D in FIG. 3, and the collective belt 25a of the collective belt conveyor 25 on the left side in FIG. 3 runs toward the right side indicated by arrow E in FIG. It is supposed to be free.

  The objects to be weighed P conveyed by the collecting belt conveyors 25 are configured to fall downward from the gap between the pair of collecting belt conveyors 25. Further, the collecting belts of the pair of collecting belt conveyors 25 are individually driven by the driving force of the collecting belt driving motor 30 (FIG. 4). Furthermore, each collective belt driving motor 30 is electrically connected to the control unit 11 and is held in a driving state or a stopped state by a control command sent from the control unit 11.

  The discharge belt conveyor 26 is for discharging the combination-weighed objects P that fall from a gap formed between the pair of collecting belt conveyors 25, and is shown in FIGS. 2 and 3. Thus, it is arrange | positioned under a pair of belt conveyor 25 for a collection. A plurality of storage cups 31 are placed and conveyed on the discharge belt 26 a of the discharge belt conveyor 26. The discharge belt 26a of the discharge belt conveyor 26 is driven by the driving force of the discharge belt driving motor 32 (FIG. 4). Further, the discharge belt drive motor 32 is electrically connected to the control unit 11, and in accordance with a control command sent from the control unit 11, a combination weighing is performed that falls downward from the gap between the pair of belt conveyors 25 for gathering. The measured state P can be stored in the storage cup 31, and then the next storage cup 31 can be switched between the driving state and the stopped state so as to be disposed below the gap between the pair of collecting belt conveyors 25. It is formed as follows.

  The collection belt conveyor 29 reaches the plurality of weighing heads 8, that is, is for collecting the objects to be weighed P supplied to each weighing pan 9, and has a height position with the pair of collecting belt conveyors 25. Are substantially the same and are arranged to extend in parallel. The collection belt 29a of the collection belt conveyor 29 is driven by the driving force of the collection belt drive motor 33 (FIG. 4). The recovery belt drive motor 33 is electrically connected to the control unit 11 and is configured to be able to switch between a drive state and a stop state by a control command sent from the control unit 11. . A collection container (not shown) is arranged on one end side of the collection belt conveyor 29 so that an object to be weighed P conveyed by the collection belt conveyor 29 can be stored in the collection container. .

  Each take-out slider 27 is used to take out the object P to be weighed supplied to the weighing pan 9 from above the pair of collecting belt conveyors 25 shown below in FIG. As shown in FIG. 2, it has the cylindrical body 34 arrange | positioned with a slight clearance above the weighing pan 9. These cylindrical bodies 34 are arranged with their openings directed in the vertical direction in FIG. 2, and the object P to be weighed supplied from the tip of the supply belt 13 a to the weighing pan 9 is on the upper surface of the weighing pan 9. It falls into the opening of the cylindrical body 34 and is supplied. The cylindrical body 34 is connected to a rod 35a which is an output shaft of a slider moving reciprocating cylinder 35. These reciprocating cylinders 35 for moving the slider are electrically connected to the control unit 11, and in response to a control command sent from the control unit 11, the rod 35 a as an output shaft of the reciprocating cylinder 35 for moving the slider is advanced (retracted). 2), the cylindrical body 34 is held above the weighing pan 9 indicated by the solid line in FIG. 2, and the movement held above the collecting belt conveyor 25 indicated by the broken line in FIG. It is formed so that two positions can be selectively taken. A specific example of the take-out slider 27 is shown in FIG.

  Each of the storage hoppers 28 is for temporarily storing the object P taken out from each weighing pan 9 by the take-out slider 27, and is to be dropped from the weighing pan 9 by the movement of the take-out slider 27. It has a cylindrical hopper body 36 that receives and stores the weighing object P from below, and a flat shutter 37 that opens or closes the opening at the bottom of the hopper body 36. Each hopper main body 36 is connected to a rod 38a of a reciprocating cylinder 38 for hopper movement. These reciprocating cylinders 38 for moving the hopper are electrically connected to the control unit 11, and the rod 38 a of the reciprocating cylinder 38 for moving the hopper moves forward and backward (extends and contracts) in accordance with a control command sent from the control unit 11. Thus, the initial position where the hopper body 36 indicated by the solid line in FIG. 2 is held above the collecting belt conveyor 25 and the moving position held above the collecting belt conveyor 29 indicated by the broken line in FIG. It is formed so that the position can be selectively taken.

  Each shutter 37 is connected to a rod 39a which is an output shaft of a reciprocating cylinder 39 for opening and closing. These open / close reciprocating cylinders 39 are electrically connected to the control unit 11, and the rods of the open / close reciprocating cylinders 39 are advanced and retracted (expanded / contracted) by a control command sent from the control unit 11. A closed state in which the shutter 37 is held so as to close the opening at the bottom of the hopper body 36 and an open state in which the shutter 37 is slid and held so as to open the opening at the bottom of the hopper body 36 are selectively taken. Shaped to get. The reciprocating cylinder 39 for opening and closing is formed so as to move in conjunction with the advance and retreat of the rod 38a of the reciprocating cylinder 38 for moving the hopper, and the hopper body 36 is held at the initial position and the moving position, respectively. In this state, the shutter 37 can be opened and closed.

  Specific examples of the storage hopper 28 are shown in FIGS. 13 and 14. Further, FIG. 15 and FIG. 16 show the positional relationship between the take-out slider 27 and the storage hopper 28 in the discharge section 5. As shown in FIGS. 15 and 16, the take-out slider 27 and the storage hopper 28 are unitized, and are attached to the main frame 6 in this state. In FIG. 16, only one cylindrical body 34 of the take-out slider 27 is shown.

  The control unit 11 is for controlling the operation of each unit. As shown in FIG. 4, the control unit 11 includes at least a CPU 40 and a memory 41 formed of ROM, RAM, or the like having an appropriate capacity. have. The control unit 11 includes at least a load cell 10, a supply belt drive motor 14, a swing drive motor 19, a blade rotation drive motor 23, a collective belt drive motor 30, a discharge belt drive motor 32, and a recovery belt drive. Warning means and power supply formed by a motor 33, a reciprocating cylinder 35 for moving a slider, a reciprocating cylinder 38 for moving a hopper, a reciprocating cylinder 39 for opening and closing, an indicator lamp or a buzzer for notifying an operator (not shown) Various known switches such as a switch and a start switch for operation provided on the operation panel 7, sensors, a power switch, an emergency stop switch, and the like are electrically connected.

  In the memory 41, at least a program for intermittently driving the supply belt 13a of the supply belt conveyor 13, and weight data (measurement value) of each object P supplied to each weighing pan 9 delivered from each load cell 10. ), Various combinations of the respective measurement values are selected, and a combination in which the total weight is within the allowable range of the set weight is selected, and the selected objects P are collectively discharged by the discharge unit 5. When the weighing object P that reaches the weighing pans 9 of the plurality of weighing heads 8 is held by the weighing head 8 for a preset time, the weighing object P is controlled. And a program for controlling the operation of each part so as to be recovered by the recovery belt conveyor 29.

  Note that the program can select the combination, and perform the parallel processing of the operation of collecting and discharging the selected objects to be weighed by the discharge unit 5 and the operation of collecting the objects to be weighed by the recovery belt conveyor 29. It is configured as follows.

  As a program for intermittently driving the supply belt 13 a of the supply belt conveyor 13, based on the weight data (measurement value) of each object to be weighed P supplied to each weighing pan 9 sent from each load cell 10, It is determined whether or not the weighing object P is present on each weighing pan 9, and when the weighing object P is not supplied to each weighing pan 9, the supply belt 13 a is set every predetermined time. For example, when the supply belt driving motor 14 is intermittently driven so as to be intermittently driven at a pitch of 10 mm and the objects P to be weighed are supplied to the weighing pans 9, the supply belt 13 a is held in a stopped state. An example of controlling the supply belt driving motor 14 can be exemplified.

  Since the program for selecting the combination can be selected from conventionally known various programs, detailed description thereof will be omitted.

  As a program for controlling the operation of each part so that the selected objects to be weighed P are collectively discharged by the discharge unit 5, those relating to the operation of the take-out slider 27, those relating to the operation of the storage hopper 28, There are things related to the operation of the belt conveyor 25 and the discharge belt conveyor 26.

  As a program relating to the operation of the take-out slider 27, the slider moving reciprocating cylinder 35 is moved from the initial position to the moving position so that the take-out slider 27 of the weighing pan 9 to which the selected object P is supplied is moved. The rod 35a is contracted and held at the moving position, and then the rod 35a of the slider moving reciprocating cylinder 35 is extended to return the take-out slider 27 to the initial position.

  As a program relating to the operation of the storage hopper 28, after the take-out slider 27 has moved to the moving position, it is driven to contract the rod 39 a of the open / close reciprocating cylinder 39 of the storage hopper 28 and the shutter of the storage hopper 28. 37 is opened, and after the object P stored in the storage hopper 28 falls from the storage hopper 28, the shutter 39 of the storage hopper 28 is driven by extending the rod 39a of the reciprocating cylinder 39 for opening and closing. An example is one in which 37 is returned from an open state to a closed state.

  As a program related to the operation of the collecting belt conveyor 25 and the discharging belt conveyor 26, the discharging belt driving motor 32 is driven to hold the storage cup 31 at a position below the gap of the collecting belt conveyor 25, and the storage hopper The storage cup 31 storing the measurement object P by driving the discharge belt driving motor 32 at the timing when the measurement object P dropped from 28 is stored in the storage cup 31 through the gap of the collecting belt conveyor 25. The discharge belt drive motor 32 is driven so that the storage cup 31 is transported by the discharge belt 26a of the discharge belt conveyor 26 and is held below the gap of the collecting belt conveyor 25 for the storage of the next object P to be weighed. Examples are those that control stop timing.

  As a program for collecting the object P to be collected by the collecting belt conveyor 29, there are a program related to the operation of the take-out slider 27, a program related to the operation of the storage hopper 28, and the like.

  As a program related to the operation of the take-out slider 27, each weighing pan 9 is loaded on the basis of the weight data (measured value) of each weighing object P supplied to each weighing pan 9 sent from each load cell 10. It is determined whether or not there is an object to be weighed P, and when the object to be weighed P is supplied to each weighing pan 9, it is determined whether or not a preset time has elapsed, and the preset time is determined. When the time has elapsed, the rod 35a of the reciprocating cylinder 35 for moving the slider is contracted to the moving position so that the take-out slider 27 of the weighing pan 9 supplied with the object P is moved from the initial position to the moving position. For example, the rod 35a of the reciprocating cylinder 35 for moving the slider is extended and the take-out slider 27 is returned to the initial position.

  In determining whether or not the object P to be collected is to be collected, the preset number of times of measurement, that is, the number of times a combination of set weights is selected, is used as the time held in the weighing pan 9. May be.

  As a program related to the operation of the storage hopper 28, the rod 38a of the reciprocating cylinder 38 for moving the hopper is moved at a timing when the object P is stored in the storage hopper 28 after the take-out slider 27 is moved to the moving position. The storage hopper 28 is contracted to move from the initial position to the moving position, and then the open / close reciprocating cylinder 39 of the storage hopper 28 is driven to open the shutter 37 of the storage hopper 28. After the stored object P falls from the storage hopper 28 onto the recovery belt conveyor 29, the open / close reciprocating cylinder 39 is driven to return the shutter 37 of the storage hopper 28 from the open state to the closed state. After that, the rod 35a of the reciprocating cylinder 35 for moving the slider is extended to return from the moving position to the initial position. It can Shimesuru.

  For example, each load cell 10 determines whether or not the weighing object P is on the weighing pan 9 when the weighing object P is not supplied to the weighing pan 9. Since the weight data “zero or almost zero” is sent to the control unit 11, it is determined whether or not the value of the weight data is smaller than a preset threshold value. The presence or absence of supply can be easily determined.

  In addition, as a raw material used for the site | part which the to-be-measured item P of the combination weighing | measuring device 1 in this embodiment contacts, it is various materials, such as a food safe material, for example, metals, such as stainless steel, polytetrafluoroethylene (PTFE) It is preferable to select from such resins as rubbers such as silicone rubber. Moreover, it is preferable that the surface of a contact part with the to-be-measured object P is embossed or wrinkled with the unevenness | corrugation which makes the contact area for preventing adhesion and adhesion of the to-be-measured object P small. .

  The operation timing of each unit is controlled by a program or a detection signal from a sensor (not shown).

  Next, the operation of the present embodiment having the above-described configuration will be described.

  The combination operation of the objects to be weighed P by the combination weighing device 1 of the present embodiment is started by turning on the start switch while supplying power. Then, the swing drive motor 19 and the blade rotation drive motor 23 are driven. A predetermined stroke set in advance in a direction orthogonal to the direction in which the object to be weighed P is supplied, as indicated by a double arrow B in FIG. To start reciprocal movement. Further, the rotation shaft 22 of the rotary blade 21 is driven to rotate by driving the blade rotation drive motor 23, and the rotary blade 21 is conveyed on the supply belt 13a as shown by the arrow C in FIG. Rotation driving is started in a direction opposite to the conveyance direction of the object to be weighed P indicated by A.

  Further, the supply belt drive motor 14, the collective belt drive motor 30, the discharge belt drive motor 32, and the recovery belt drive motor 33 are driven. Further, each take-out slider 27 and each storage hopper 28 of the discharge unit 5 are held at their initial positions by a slider moving reciprocating cylinder 35 and a hopper moving reciprocating cylinder 38. Further, the shutter 37 of the storage hopper 28 is held in a closed state by an open / close reciprocating cylinder 39.

  In this state, the plurality of storage cups 31 are sequentially placed on the collection belt conveyor 29 from the right end side in FIG. Then, the plurality of storage cups 31 are sequentially transported in alignment below the gap formed between the pair of collecting belt conveyors 25, and the leading storage cup 31 is moved to the pair of collecting belt conveyors 25. When reaching below the gap formed between them, the driving of the collective belt drive motor 30 is stopped, and the storage cup 31 for storing the first weighed object P is stored in the pair of collective belt conveyors 25. Are held below a gap formed between the two. Note that a sensor (not shown) detects that the storage cup 31 has reached a position below a gap formed between the pair of collecting belt conveyors 25.

  Next, the objects to be weighed P are supplied to the supply positions SS shown above the supply troughs 16 of the supply unit 4, that is, to the upper side of the supply troughs 16 from the positions where the rotary blades 21 of FIG. And the to-be-measured item P supplied to supply position SS passes the supply trough 16 from the upper direction to the downward direction, is mounted on the supply belt 13a of the supply belt conveyor 13, and is shown by the arrow A of FIG. The belt 13a is sequentially conveyed at a predetermined pitch toward the downstream side in the traveling direction of the belt 13a.

  At this time, the object to be weighed P conveyed on the supply belt 13a is positioned between a pair of width regulation guides 18 constituting a part of the supply dimension regulation means 24, and at the double arrow B in FIG. As shown, the inner side surfaces of the pair of width regulating guides 18 reciprocating in the direction orthogonal to the conveyance direction A come in contact with and away from the direction orthogonal to the conveyance direction A, and each object P is paired. By pushing the width regulation guide 18 to the center of the intermediate point of each movement locus, each object P is regulated in the travel position in the direction orthogonal to the conveyance direction A on the conveyance surface of the supply belt 13a. In addition to being sequentially aligned and transported from between the pair of width regulation guides 18, the width dimension orthogonal to the transport direction A is regulated (only one row is shown in FIG. 3). FIG. 17 shows an enlarged view of the transport state of the object P to be transported on the supply belt 13a.

  Further, each object P passes through the lower part of the rotating blade 21 constituting the other part of the supply dimension regulating means 24 while being conveyed along the conveying direction A, so that the rotation locus of the tip of the rotating blade 21 is rotated. The object to be weighed P that overlaps above the lowermost position is returned to the upstream side in the transport direction A from the position where the rotary blade 21 is disposed by the rotary blade 21. As a result, the height dimension of the measurement object P conveyed on the supply belt 13a is regulated.

  Therefore, the objects P to be weighed conveyed by the supply belt 13a are aligned in the conveying direction A by the supply dimension regulating means 24, and the width dimension and the height dimension orthogonal to the conveying direction are regulated as a whole. It will be conveyed in the shape of a rod.

  Next, the object to be weighed P conveyed on the supply belt 13a along the conveyance direction A is intermittently driven, so that, for example, a small amount of about 5 grams, for example, from the front end side. It falls on the upper surface, specifically, the portion surrounded by the cylindrical body 34 of the take-out slider 27 on the upper surface of the weighing pan 9.

  Then, by dropping onto each weighing pan 9, the weight of the small amount of object P supplied to the weighing pan 9 is measured by the load cell 10, and the measured weight data is sent to the control unit 11.

  Next, the control unit 11 that has received the weight data is applied to the weighing pan 9 to which the load cell 10 that has transmitted the weight data exceeding the preset threshold value is connected based on the program stored in the memory 41. A control command is sent to the supply belt driving motor 14 so that the supply belt 13a supplying the weighing object P is kept in the stopped state. Thereby, all of the supply belts 13a for supplying the objects to be weighed to the weighing dishes 9 to which the objects to be weighed P of the weighing dishes 9 are supplied are stopped, and weight data equal to or less than a preset threshold value. Is intermittently driven for all of the supply belt driving motors 14 that are driving the supply belt 13a that supplies the object P to the weighing pan 9 to which the load cell 10 that has transmitted A control command is sent out.

  Next, the control unit 11 variously combines the measured values of the objects to be weighed P supplied to the plurality of weighing heads 8 based on the program stored in the memory 41, and the total weight of these combinations is determined. A combination that is within an allowable range of a preset weight is selected.

  At this time, since the objects to be weighed P are supplied in small amounts to each weighing pan 9, a small amount of combination weighing can be performed efficiently.

  When the control unit 11 selects a combination that is within the allowable range of the set weight, the reciprocating cylinder 35 for moving the slider of the take-out slider 27 disposed on the weighing pan 9 to which the object P to be weighed is supplied. To move the take-out slider 27 from the initial position indicated by the solid line in FIG. 2 to the movement position indicated by the broken line in FIG. Then, the combined objects P supplied to the weighing pan 9 fall from the weighing pan 9 to the storage hopper 28 corresponding to the weighing pan 9. At this time, when the object to be weighed P is taken out from the weighing pan 9, the load cell 10 sends weight data below a preset threshold value indicating that the object to be weighed P is not supplied to the weighing pan 9. Receiving the weight data that the object P is not supplied to the pan 9, the control unit 11 drives the slider moving reciprocating cylinder 35 to return the take-out slider 27 from the moving position to the initial position.

  When the object P falls and is stored in the storage hopper 28, the open / close reciprocating cylinder 39 is driven by the control command from the control unit 11, and the shutter 37 is changed from the closed state to the open state. As a result, the objects to be weighed P stored in the storage hopper 28 drop onto the collecting belt 25a of the collecting belt conveyor 25 and are conveyed toward the center of the pair of collecting belt conveyors 25 in the arrangement direction. Then, each of the objects to be weighed P conveyed toward the central portion in the arrangement direction of the pair of collecting belt conveyors 25 falls downward from the gap between the pair of collecting belt conveyors 25, and the discharging belt. It is stored in a storage cup 31 placed on the discharge belt 26a of the conveyor 26. When the object P to be weighed is stored in the storage cup 31, the discharge belt drive motor 32 is driven by the control command sent from the control unit 11, and the discharge belt 26a of the discharge belt conveyor 26 is driven. As a result, the storage cup 31 in which the weighed articles P that have been weighed in combination are transported, and the next storage cup 31 is disposed below the gap between the pair of collecting belt conveyors 25. And if the next storage cup 31 is arrange | positioned under the clearance gap between a pair of gathering belt conveyors 25, the drive of the discharge belt drive motor 32 will be stopped.

  When the object P stored in the storage hopper 28 falls onto the collecting belt 25 a of the collecting belt conveyor 25, the open / close reciprocating cylinder 39 is driven by the control command from the controller 11, and the shutter 37. Is changed from the open state to the closed state.

  When the control unit 11 determines that the object to be weighed P that has reached the weighing pans 9 of the plurality of weighing heads 8 is held by the weighing head 8 over a preset time, that is, each weighing pan 9. When there is no combination in which all the weight combinations of the objects to be weighed P supplied to the set weight are within the allowable range of the set weight, and when the preset time has been exceeded by deviating from the selection of the combination within the allowable range of the set weight If it is determined that there is an object to be weighed P remaining on the weighing pan 9, the slider moving reciprocating cylinder 35 of the take-out slider 27 arranged on the weighing pan 9 to which the object to be weighed P is supplied is driven. Then, the take-out slider 27 is moved from the initial position indicated by the solid line in FIG. 2 to the movement position indicated by the broken line in FIG. Then, the combined objects P supplied to the weighing pan 9 fall from the weighing pan 9 to the storage hopper 28 corresponding to the weighing pan 9.

  At this time, when the object to be weighed P is taken out from the weighing pan 9, the load cell 10 sends weight data indicating that the object to be weighed P is not supplied to the weighing pan 9. The control unit 11 that has received the weight data that no is supplied supplies the slider moving reciprocating cylinder 35 to return the take-out slider 27 from the moving position to the initial position.

  Note that whether or not the object P to be weighed supplied to the weighing pan 9 has been held for a predetermined time is determined by connecting the time from the time when the weight data sent from the load cell 10 is received to the control unit 11. For example, by counting with a timer.

  When the object P falls and is stored in the storage hopper 28, the hopper moving reciprocating cylinder 38 is driven by a control command from the control unit 11, and the storage hopper 28 is initially shown by a solid line in FIG. The position is moved to the movement position indicated by the broken line in FIG. When the storage hopper 28 moves to the movement position, the open / close reciprocating cylinder 39 is driven by the control command from the control unit 11, and the shutter 37 is changed from the closed state to the open state. As a result, the measurement object P stored in the storage hopper 28 falls onto the recovery belt 29a of the recovery belt conveyor 29 and is conveyed to one end side of the recovery belt conveyor 29 by the traveling recovery belt 29a. Stored in a container. When the object P stored in the storage hopper 28 falls on the collection belt 29 a of the collection belt conveyor 29, the open / close reciprocating cylinder 39 is driven by the control command from the control unit 11, and the shutter 37. Is changed from the open state to the closed state, and then the hopper moving reciprocating cylinder 38 is driven to return the storage hopper 28 from the moving position to the initial position. The operation of changing the shutter 37 from the open state to the closed state and the operation of returning the storage hopper 28 from the moving position to the initial position may be performed simultaneously or in the reverse order.

  In the combination weighing device 1 of the present embodiment, a combination is selected from the objects to be weighed P supplied to each weighing pan 9, the collective discharge of the selected objects to be weighed P, and the objects to be fed supplied to the weighing pan 9. It is determined whether or not the weighing object P is held for a predetermined time, and collection of the weighing object P determined to be held for a predetermined time is performed in parallel.

  Thus, according to the combination weighing device 1 of the present embodiment, each of the objects to be weighed P conveyed on the plurality of supply belt conveyors 13 is aligned in the conveyance direction A, and with respect to the conveyance direction A. Since the supply dimension restricting means 24 for restricting the width dimension and the height dimension orthogonal to each other is provided, it is possible to supply the objects to be weighed P to the weighing pans 9 of the weighing unit 2 little by little. As a result, a small amount of combination weighing of the objects to be weighed P having adhesion or stickiness can be performed efficiently.

  In other words, by supplying a small amount of the weighing object P to each weighing pan 9 of the weighing unit 2, the weight of the weighing object P measured by the weighing pan 9 of one weighing unit 2 is reduced. The probability of obtaining a combination that is weight is extremely high.

  Further, according to the combination weighing device 1 of the present embodiment, the supply dimension regulating means 24 can come into contact with the measurement object P conveyed on the supply belt conveyor 13 in the conveyance direction A of the measurement object P. A pair of width regulating guides 18 arranged in parallel to each other and reciprocated in a direction orthogonal to the conveying direction A of the object P by the driving force of the swing drive motor 19, and a supply belt The rotating blade 21 is arranged so as to face the conveyor 13 and is rotated by the driving force of the blade rotation driving motor 23 so as to face the conveying direction A of the object P to be measured. Since the rotation trajectory is arranged inside the pair of width regulating guides 18, each of the objects to be weighed P conveyed on the plurality of supply belt conveyors 13 is aligned in the conveyance direction A, and the conveyance That regulate the width dimension and height dimension orthogonal it can be easily and reliably with respect to the direction.

  Furthermore, according to the combination weighing device 1 of the present embodiment, the pair of width regulating guides 18 of the supply dimension regulating means 24 are provided at the lower part of each of the plurality of supply troughs 16 of the supply unit 4. Is formed so as to be reciprocally movable in a direction perpendicular to the conveying direction of the object to be weighed by a swinging drive motor 19 as a driving means. Each of the weighing objects P can be more easily and reliably aligned in the conveyance direction A.

  Further, according to the combination weighing device 1 of the present embodiment, since the supply belt conveyor 13 is formed to be intermittently driven, the objects to be weighed P are supplied to the weighing pan 9 of the weighing unit 2 little by little. That can be done more reliably.

  Furthermore, according to the combination weighing device 1 of the present embodiment, the discharge unit 5 further includes a collection belt conveyor 29 for collecting the objects to be weighed P that have reached the plurality of weighing heads 8. When the weighing object P that has reached the weighing pan 9 of the plurality of weighing heads 8 is held by the weighing head 8 over a preset time, the unit 11 uses the collection belt conveyor 29 to collect the weighing object P. Since it is formed so as to be collected, it is possible to further improve the combination efficiency of a small amount of combination weighing of the object P having adhesion or stickiness. That is, a small amount of objects P to be used for combination weighing can be sequentially supplied to each weighing pan 9 from next to next.

  Furthermore, according to the combination weighing device 1 of the present embodiment, the discharge belt conveyor 26 and the recovery belt conveyor 29 are disposed in the discharge unit 5, so that the selected weighing object can be selected by the combination weighing and collecting belt conveyor 25. Since the collective discharge of the weighing object P and the collection of the weighing object P held by the weighing head 8 over a preset time by the collecting belt conveyor 29 can be performed in parallel, The combination efficiency of combination weighing can be further improved.

  In general combination weighing devices, a belt conveyor used for collective discharge of objects to be weighed is used for collection (one line). When collecting objects to be weighed, combination weighing and objects to be weighed are collected. Since collective discharge cannot be performed, the combination efficiency of the combination weighing of the objects to be weighed P is poor. In addition, in order to collect the objects to be weighed, it is necessary to temporarily stop the combination weighing of the objects to be weighed, and for example, it is different from collective discharge such as running the belt in the forward direction and running in the reverse direction Since the control of the belt is required, the program becomes complicated and the time required for the collecting operation becomes long.

  As an object to be weighed in which the combination weighing device of the present invention is used, various items limited to food materials can be used.

  In addition, this invention is not limited to embodiment mentioned above, A various change is possible as needed.

The typical front view showing the important section of the embodiment of the combination weighing device concerning the present invention. Schematic side view of the main part of FIG. Schematic plan view of the main part of FIG. The block diagram which shows the principal part structure of the control part of the combination weighing | measuring apparatus of FIG. 1 is an external perspective view showing a specific example of the combination weighing device of FIG. 1 together with the main frame. FIG. 1 is an external perspective view showing a specific example of a weighing unit of the combination weighing device of FIG. 1 is an external perspective view showing a specific example of a supply belt conveyor of the combination weighing device of FIG. FIG. 1 is an external perspective view showing a specific example of a supply unit of the combination weighing device of FIG. FIG. 1 is an external perspective view showing a specific example of an arrangement relationship between a supply conveyance unit and a supply unit of the combination weighing device of FIG. Side view of FIG. FIG. 1 is an external perspective view showing a specific example of rotating blades of the combination weighing device of FIG. FIG. 1 is an external perspective view showing a specific example of the take-out slider of the combination weighing device of FIG. 1 is an external perspective view showing a specific example of a storage hopper of the combination weighing device of FIG. Front view of FIG. FIG. 1 is an external perspective view showing a specific example of the arrangement relationship between the take-out slider and the storage hopper of the combination weighing device of FIG. FIG. 15 is an external perspective view of FIG. 15 viewed from below. The typical top view which expands and shows the conveyance state of the to-be-measured object conveyed on the supply belt in the combination weighing apparatus of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Combination measuring device 2 Weighing part 3 Feeding part 4 Feeding part 5 Discharge part 8 Weighing head 9 Weighing pan 10 Load cell 13 Feeding belt conveyor 13a Feeding belt 14 Feeding belt drive motor 16 Feeding trough 18 Width regulation guide 19 For swinging Drive motor 21 Rotating blade 23 Blade driving motor 24 Supply dimension regulating means 25 Collecting belt conveyor 26 Discharging belt conveyor 27 Picking slider 28 Storage hopper 29 Collecting belt conveyor 30 Collecting belt driving motor 32 Discharging belt driving motor 32 33 Recovery belt drive motor 34 Cylindrical body 35 Reciprocating cylinder for slider movement 36 Hopper body 37 Shutter 38 Reciprocating cylinder for hopper movement 39 Reciprocating cylinder for opening and closing P Measurement object

Claims (5)

A weighing unit including a plurality of weighing heads arranged in a direction orthogonal to a direction in which an object to be weighed is supplied;
A supply transport unit including the same number of supply belt conveyors as the plurality of measurement heads for supplying an object to be measured to each of the plurality of measurement heads;
A supply unit comprising the same number of supply troughs as the plurality of supply belt conveyors for supplying an object to be measured to each of the plurality of supply belt conveyors;
A discharge unit including a discharge belt conveyor for collecting and discharging the objects to be weighed supplied to the plurality of measurement heads;
A control unit that controls the operation of each unit,
The controller selects various combinations of measured values of the objects to be weighed supplied to the plurality of weighing heads, and selects a combination in which the total weight is within the allowable range of the set weight. In a combination weighing device configured to collect and discharge collected objects by the discharge unit,
Each of the objects to be weighed conveyed on the plurality of supply belt conveyors is arranged in the conveyance direction, and supply dimension regulating means for regulating the width dimension and the height dimension orthogonal to the conveyance direction is provided. A combination weighing device characterized by comprising: The supply dimension regulating means is
The feed belt conveyor is arranged in parallel with the transport direction of the object to be weighed so as to be in contact with the object to be weighed, and is driven with respect to the transport direction of the object by the driving force of the swing drive actuator. A pair of width regulating guides which are reciprocated in directions perpendicular to each other and parallel to each other,
It has a rotating blade that is arranged so as to face the supply belt conveyor and is rotated by the driving force of the blade rotating drive actuator so as to face the conveying direction of the object to be weighed,
The combination weighing device according to claim 1, wherein a rotation trajectory by a tip of the rotary blade is disposed inside the pair of width regulating guides.   A pair of width restricting guides of the supply dimension restricting means are provided at the lower part of each of the plurality of supply troughs of the supply part, and the whole of the supply part is moved by the drive means with respect to the conveying direction of the object to be measured The combination weighing device according to claim 2, wherein the combination weighing device is formed so as to be reciprocally movable in an orthogonal direction.   The combination weighing device according to any one of claims 1 to 3, wherein the supply belt conveyor is formed to be intermittently driven. The discharge unit further includes a collection belt conveyor for collecting the objects to be weighed that have reached the plurality of weighing heads,
The control unit is configured to collect the objects to be weighed by the collecting belt conveyor when the objects to be weighed that have reached the plurality of weighing heads are held by the weighing head over a preset time. The combination weighing device according to any one of claims 1 to 4, wherein the combination weighing device is provided.

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