WO2023053440A1 - Combination balance - Google Patents

Combination balance Download PDF

Info

Publication number
WO2023053440A1
WO2023053440A1 PCT/JP2021/036414 JP2021036414W WO2023053440A1 WO 2023053440 A1 WO2023053440 A1 WO 2023053440A1 JP 2021036414 W JP2021036414 W JP 2021036414W WO 2023053440 A1 WO2023053440 A1 WO 2023053440A1
Authority
WO
WIPO (PCT)
Prior art keywords
gate
weighed
plate pair
pair
gate plate
Prior art date
Application number
PCT/JP2021/036414
Other languages
French (fr)
Japanese (ja)
Inventor
久志 津川
隆明 川島
Original Assignee
大和製衡株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 大和製衡株式会社 filed Critical 大和製衡株式会社
Priority to PCT/JP2021/036414 priority Critical patent/WO2023053440A1/en
Publication of WO2023053440A1 publication Critical patent/WO2023053440A1/en

Links

Images

Classifications

    • 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

Definitions

  • the present invention relates to a combination weigher in which objects to be weighed are supplied by an operator.
  • Patent Document 1 describes a combination weigher in which the objects to be weighed are supplied by an operator and the objects to be weighed are discharged automatically.
  • This combination weigher is equipped with a plurality of weighing conveyors, the items to be weighed are supplied to each weighing conveyor, and the weight of the items to be weighed is measured. Then, a combination of weighing conveyors in which the total weight of the objects to be weighed falls within the target weight range is found, and the objects to be weighed are discharged from the weighing conveyors of the found combination.
  • a pair of gate plates with a double-door structure is arranged above each weighing conveyor. When the pair of gate plates is open, an operator feeds an object to be weighed onto the weighing conveyor and moves the pair of gates. When the plate is closed, the object to be weighed is fed onto the gate plate.
  • the combination weigher disclosed in Patent Document 1 is equipped with a compression spring that generates an urging force to reduce damage to the items to be weighed caught in the gate plates. There is room for further improvement with respect to the lack of attention on the part of the operator who is caught in the gap.
  • the present invention has been made to solve the above-mentioned problems, and when the fingers of an operator are caught between a pair of gate plates (a pair of gate plates), the fingers of the operator can be easily released from the pair of gate plates.
  • An object of the present invention is to provide a combination weigher capable of
  • a combination weigher includes a workbench having a plurality of supply openings through which objects to be weighed are supplied by an operator, and a plurality of gate plate pairs provided below the gates to hold the objects to be weighed when closed and to discharge the held objects by opening downward;
  • a plurality of weighing units for discharging objects to be weighed; a combination processing unit for determining a combination of the objects to be weighed whose total weight is within a target weight range based on the weights weighed by the weighing units; Based on the weight obtained, it is determined whether or not the object to be weighed is supplied to the weighing unit, and when the object is supplied, the corresponding gate plate pair is closed, and when the object is not supplied, the corresponding gate plate pair is opened. and a full-close detection unit for detecting a fully-closed state of the gate plate pair, wherein the gate control unit closes the gate plate pair so as to close the gate.
  • the opening/closing drive unit When the opening/closing drive unit is controlled, if the fully closed detection unit does not detect the fully closed state of the gate plate pair within the first predetermined time from the start of control, the gate is operated to open the gate plate pair. It is configured to control the opening and closing drive.
  • the gate control unit controls the gate opening/closing driving unit to close the gate plate pair
  • the operator's lack of attention can cause the operator's finger to be caught between the gate plate pair, and the operator's fingers may be completely removed within the first predetermined time.
  • the gate opening/closing drive section is controlled to open the gate plate pair. Therefore, when the operator's fingers are caught between the pair of gate plates, the operator's fingers can be easily released.
  • the gate opening/closing driving section may be controlled to close the gate plate pair after a second predetermined time has elapsed.
  • the operator can continue the work of supplying the objects to be weighed without performing the return operation for closing the gate plate pair.
  • the gate opening/closing drive unit has an actuator whose operation is controlled by the gate control unit, and an opening/closing mechanism unit that opens and closes the gate plate pair in conjunction with the operation of the actuator. , the fully closed state of the gate plate pair may be detected based on the operating position of the actuator.
  • the gate opening/closing drive unit has an actuator whose operation is controlled by the gate control unit, and an opening/closing mechanism unit that opens and closes the gate plate pair in conjunction with the operation of the actuator.
  • the gate plate pair may be configured to detect the fully closed state by detecting the position of a predetermined portion of the opening/closing mechanism.
  • the weighing unit is provided below the pair of gate plates in correspondence with the weighing conveyor, temporarily holds an object to be weighed supplied from above in a state in which conveyance is stopped, and carries out the held object to be weighed; and a weight sensor attached to the conveyor for measuring the weight of the objects to be weighed on the weighing conveyor.
  • a discharge conveyor, to which the objects to be weighed are supplied, may be further provided for conveying the supplied objects to be weighed and discharging them to the outside.
  • the present invention provides a combination weigher that has the above-described configuration and can easily release the operator's fingers from the pair of gate plates when the operator's fingers are caught between the pair of gate plates. It has the effect of being able to
  • FIG. 1A is a schematic plan view of a combination weigher as an example of the present embodiment, viewed from above.
  • FIG. 1B is a schematic front view of a combination weigher.
  • FIG. 1C is a schematic side view of the combination balance.
  • FIG. 2 is a perspective view of the appearance of the combination weigher.
  • FIG. 3 is a perspective view showing an example of a plurality of supply gate devices provided in the combination weigher.
  • FIG. 4A is a top plan view of the supply gate.
  • FIG. 4B is a side view of the supply gate.
  • FIG. 4C is a view of the supply gate viewed from the left side in FIG. 4B.
  • FIG. 5A is a side view of the feed gate and its attachment.
  • FIG. 5B is a left side view of the supply gate and its mounting portion in FIG. 5A.
  • FIG. 5C is a side view showing how the supply gate is attached.
  • FIG. 6A is a front view of the gate driver.
  • FIG. 6B is a side view of the gate driver.
  • FIG. 7A is a front view showing the state of the supply gate device when the pair of gate plates are fully open.
  • FIG. 7B is a front view showing the state of the supply gate device when the pair of gate plates are in the fully closed state.
  • FIG. 7C is a front view showing the state of the supply gate device when the operator's fingers are caught between the pair of gate plates when they are closed.
  • FIG. 8 is a flow chart showing an outline of the processing from the supply of the object to be weighed to any one weighing unit to the calculation of the weight of the object.
  • FIG. 9A is a front view showing a state of the supply gate device when a pair of gate plates are in a fully open state when the gate driving section of the modified example is provided.
  • FIG. 9B is a front view showing the state of the supply gate device when the pair of gate plates are in the fully closed state when the modified gate driving section is provided.
  • FIG. 9C is a front view showing the state of the supply gate device when the operator's fingers are caught between the pair of gate plates when the gate drive unit of the modified example is provided and the fingers are caught between the gate plates.
  • FIG. 1A is a schematic plan view of a combination weigher as an example of the present embodiment viewed from above
  • FIG. 1B is a schematic front view of the combination balance
  • FIG. 1C is a schematic side view of the combination balance
  • FIG. 2 is a perspective view of the appearance of the same combination weigher.
  • a combination weigher includes a workbench 12 provided with a plurality of supply ports 13 and a plurality of supply ports 12 having gate plate pairs 20 (gate plates 21 and 22) provided directly below each supply port 13. It includes a gate 6, a plurality of weighing units Cw provided directly below the gate plate pairs 20 of each supply gate 6, a discharge conveyor 3, an operation display 4, a control device 5, and the like.
  • Each weighing unit Cw includes a weighing conveyor 1 configured by a belt conveyor and a weight sensor 2 configured by a load cell or the like for supporting the weighing conveyor 1 .
  • a weighing conveyor 1 conveys an object to be weighed in one direction (direction of arrow a or b).
  • the weight sensor 2 measures the weight of the object to be weighed on the weighing conveyor 1 and outputs the measured value to the control device 5 .
  • the discharge conveyor 3 is a conveyor configured by a belt conveyor, and conveys the objects to be weighed in the direction of arrow c, for example.
  • a plurality of weighing conveyors 1 arranged on one side of the discharging conveyor 3 are arranged in parallel with each other, and the conveying direction of each of them (the direction of arrow a) is the conveying direction of the discharging conveyor 3 (the direction of arrow c). are arranged so as to cross (perpendicularly in this example) the .
  • a plurality of weighing conveyors 1 arranged on the other side of discharge conveyor 3 are also arranged in parallel with each other, and the conveying direction of each of them (the direction of arrow b) coincides with the conveying direction of discharge conveyor 3 (the direction of arrow c). direction) and intersect (perpendicular in this example).
  • An electrical component storage unit 10 is provided below the discharge conveyor 3.
  • the electrical component storage unit 10 houses a plurality of weighing conveyors 1 and a conveyor drive circuit for the discharge conveyor 3. .
  • a workbench 12 is arranged above the device of this combination weigher, that is, above all the weighing conveyors 1 and discharge conveyors 3 .
  • the worktable 12 is composed of two divided worktables 12a and 12b, which are mounted on side plates 11a and 11b on both sides and a predetermined support member 15 and are detachable.
  • the workbench 12 is provided with a supply port 13 having a square (for example, rectangular) opening at a position directly above each weighing conveyor 1 . As shown in FIG. 2, each supply port 13 is provided with a short cylindrical opening edge portion 13a extending downward toward the gate plate pair 20 from the square opening edge 13e.
  • a supply gate 6 is provided for each supply port 13 .
  • Each supply gate 6 is provided with a gate plate pair 20 consisting of a pair of gate plates 21 and 22 having a double-door structure for opening and closing the supply port 13 .
  • This gate plate pair 20 is arranged directly below the supply port 13 .
  • a weighing conveyor 1 is arranged directly below the gate plate pair 20 .
  • the supply port 13, the gate plate pair 20, and the weighing conveyor 1 are provided in correspondence with each other.
  • the gate plate pair 20 is arranged slightly below the surface of the flat plate portion of the workbench 12 and has an opening peripheral portion 13a at the supply port 13, so that the gate plate pair The object to be weighed supplied onto 20 does not spill from the gate plate pair 20. - ⁇ Therefore, the objects to be weighed can be well held on the gate plate pair 20 . Further details of the supply gate 6 will be described later.
  • the control device 5 is composed of, for example, a microcontroller or the like, and controls the entire combination weigher.
  • the control device 5 functions as a gate control section and controls the opening and closing of the gate plates 21 and 22 of each supply gate 6 by controlling the operation of the air cylinder 46 (FIG. 3, etc.).
  • the control device 5 also controls the conveying operations of each weighing conveyor 1 and discharge conveyor 3 .
  • the controller 5 inputs the measured value from each weight sensor 2 .
  • the control device 5 also receives signals from the operation display 4 and outputs signals such as data to be displayed on the operation display 4 .
  • the control device 5 does not necessarily have to be composed of a single control device, and may be composed of a plurality of control devices that cooperate with each other and perform distributed control.
  • the control device 5 also functions as a combination processing unit, and performs combination processing to obtain a discharge combination, which is a combination of the weighing conveyors 1 that discharge the objects to be weighed, based on predetermined combination conditions.
  • a combination calculation is performed based on the weight of the objects to be weighed on each weighing conveyor 1 obtained from the weight values of the weight sensors 2, and the total weight value of the supplied objects to be weighed (combined weight value) is calculated. is within the target weight range (permissible range for the target weight value), and it is determined as the discharge combination. For example, among the combinations whose combination weight value is equal to or greater than the target weight value, the combination whose combination weight value is equal to or closest to the target weight value is determined as the discharge combination.
  • the combination of weighing conveyors 1 is obtained as the discharge combination, but this corresponds to obtaining the combination of objects whose total weight is within the target weight range.
  • the operation display 4 has, for example, a touch screen type display screen, on which operations such as starting and stopping the operation of the combination weigher and various settings related to operation can be performed.
  • FIG. 3 is a perspective view showing an example of a plurality of supply gate devices provided in a combination weigher.
  • the workbench 12 and the side plates 11a and 11b on both sides are not shown.
  • 3 mainly shows a perspective view showing the arrangement configuration of a plurality of supply gates 6 and gate drive units 7, and an enlarged perspective view of one gate drive unit 7.
  • a gate drive section 7 is provided corresponding to each supply gate 6
  • a supply gate device 8 is configured by the corresponding supply gate 6 and gate drive section 7 .
  • FIG. 4A is a top plan view of the supply gate 6,
  • FIG. 4B is a side view of the supply gate 6, and
  • FIG. 4C is a left side view of the supply gate 6 in FIG. 4B.
  • 5A is a side view of the supply gate 6 and its mounting portion
  • FIG. 5B is a left side view of the supply gate 6 and its mounting portion in FIG. 5A.
  • FIG. 5C is a side view showing how the supply gate 6 is attached.
  • 5A to 5C show the state when the gate plates 21 and 22 are open (fully open state).
  • the supply gate 6 has a pair of gate plates 21 and 22 that open and close by rotating the rotating shafts 23 and 24. As shown in FIGS. When the gate plates 21 and 22 are in the fully closed state, the gate plates 21 and 22 are in a horizontal state, respectively, and the objects to be weighed can be held on the gate plates 21 and 22 . Then, when the gate plates 21 and 22 are rotated in the directions of arrows d and e shown in FIG.
  • Each gate plate 21, 22 is fixed to horizontal or substantially horizontal rotating shafts 23, 24 arranged parallel to each other.
  • Gate plates 21 and 22 indicated by solid lines in FIGS. 4A and 4B and dashed lines in FIG. 4C are shown in a fully closed state. is shown fully open.
  • a driving lever 32 is attached to one end of each of the rotating shafts 23 and 24 .
  • the drive lever 32 is composed of the connecting plate 29 , the pin 30 and the roller 31 .
  • One end of a connecting plate 29 is fixed to one end of each of the rotary shafts 23 and 24, a pin 30 is projected from the other end of the connecting plate 29, and a cylindrical roller 31 is rotatably attached to the pin 30. As shown in FIG.
  • a portion on one end side of each of the rotating shafts 23 and 24 is rotatably supported by the vertical support portion 25a of the support plate 25.
  • the other end portions of the rotating shafts 23 and 24 are rotatably supported by the vertical portion of the support plate 26 .
  • the two rotating shafts 23 and 24 are rotatably supported by support plates 25 and 26 so as to be parallel.
  • the two support plates 25 and 26 are connected by two connecting rods (for example, square rods) 27 and 28 .
  • a rotation shaft support member 33 is configured by the two support plates 25 and 26 and the two connecting rods 27 and 28 .
  • the support plate 25 is provided with side plate portions 25b on both sides of the vertical support portion 25a. Mounting recesses 25c and 25d are formed in the two side plate portions 25b, respectively.
  • a stopper member ST is attached to one end of the connecting rods 27 and 28, and when the gate plates 21 and 22 are opened, the connecting plate 29 of the driving lever 32 abuts against the stopper member ST and the gate plates 21 and 22 are closed. is designed not to open too much.
  • the supply gate 6 is a rotating shaft supporting member composed of the gate plates 21 and 22, the rotating shafts 23 and 24, the two driving levers 32, the supporting plates 25 and 26, and the connecting rods 27 and 28. 33 and a stopper member ST.
  • a pair of supply gate mounting members for detachably mounting the supply gate 6 above the upstream end side in the conveying direction of the weighing conveyor 1 are provided below the workbench 12, as shown in FIGS. 38 are provided secured to suitable support members 39 .
  • the supply gate 6 is attached to the supply gate attachment member 38 so that the support plate 25 is arranged on the upstream side in the conveying direction of the weighing conveyor 1 and the support plate 26 is arranged on the downstream side.
  • Each supply gate mounting member 38 is constructed by projecting two pins 36 and 37 that are engageable with mounting recesses 25 c and 25 d of the support plate 25 from a mounting plate 35 of a predetermined shape.
  • Mounting recesses 25c of both side plate portions 25b of the support plate 25 are fitted into the constricted portions 36a of the upper pins 36 of both of the supply gate mounting members 38, and the lower pins of both of the supply gate mounting members 38 are fitted.
  • the supply gate 6 is attached by fitting the mounting recesses 25d of both side plate portions 25b of the support plate 25 into the constricted portions 37a of the support plate 25. As shown in FIG. Here, due to the weight of the supply gate 6 itself, a downward force is applied to the lower pin 37 of the supply gate mounting member 38, and an upward force is applied to the upper pin 36, so that the supply gate 6 is in a cantilevered state. held.
  • the supply gate 6 is tilted as shown in FIG. 5C, and after fitting the mounting recesses 25c on both sides of the other support plate 25 to the constricted portions 36a of the pins 36 of both supply gate mounting members 38, The support plate 26 side should be lowered. Then, the rollers 31 of the two drive levers 32 are inserted between the lift plate 41 and the lift restricting plate 44, and the mounting recesses 25d on both sides of the other support plate 25 engage the pins of both supply gate mounting members 38.
  • the feed gate 6 can be attached by fitting into the constricted portion 37a of 37 . When removing the supply gate 6, the operator can remove the supply gate 6 by holding one of the support plates 26 and pulling it out obliquely upward.
  • the elevator plate 41 When the supply gate 6 is attached and detached, the elevator plate 41 is held at a predetermined lowered position where the gate plates 21 and 22 are fully opened.
  • the pins 36 and 37 indicated by two-dot chain lines are for attaching the adjacent supply gate 6 .
  • FIG. 6A is a front view of the gate driver 7 (viewed from the same direction as in FIG. 5B), and FIG. 6B is a side view of the gate driver 7.
  • FIG. 6A is a front view of the gate driver 7 (viewed from the same direction as in FIG. 5B)
  • FIG. 6B is a side view of the gate driver 7.
  • the gate drive unit 7 is provided near the upstream end of the weighing conveyor 1, and includes an elevating plate 41, two elevating shafts 42, two connecting shafts 43, an elevating control plate 44, and an air inlet having an air supply port 46d. It has a cylinder 46, a drive member 50, and the like.
  • the elevating plate 41 is fixed to the upper ends of two elevating shafts 42 extending downward, and an elevating restriction plate 44 is fixed directly above the elevating plate 41 via two connecting shafts 43 .
  • the distance between the lift plate 41 and the lift restriction plate 44 is determined to be slightly larger than the diameter of the roller 31 of the drive lever 32.
  • a roller 31 of a drive lever 32 is arranged.
  • the air cylinder 46 has a cylinder tube 46c, a piston 46b arranged in the cylinder tube 46c, and a rod 46a connected to the piston 46b.
  • the air cylinder 46 has a flange 48 attached to the exposed side of the rod 46 a , and the flange 48 is fixed to the lower ends of two rod-like attachment members 47 .
  • the upper ends of the two mounting members 47 are fixed to the upper end of the cylinder storage box 16 together with the seal box 45 .
  • the seal box 45 is fixed to the upper part of the cylinder storage box 16 .
  • the seal box 45 is provided with a dust seal 61 , a rod packing 62 and an O-ring 63 to support the elevating shaft 42 so as to be able to move up and down and prevent water from entering the cylinder housing box 16 .
  • a center portion of a long drive plate 50a is fixed to the tip of the rod 46a of the air cylinder 46.
  • Cylindrical shaft fixing portions 50b are fixed to both ends in the longitudinal direction of the drive plate 50a.
  • the lifting shaft 42 is fixed to the driving plate 50a by inserting its lower end into the shaft fixing portion 50b.
  • a driving member 50 is composed of the driving plate 50a and the shaft fixing portion 50b.
  • the air cylinder 46 is controlled by the controller 5 via an electromagnetic valve or the like. As the rod 46a of the air cylinder 46 contracts and expands, the driving member 50 and the two lifting shafts 42 are raised and lowered. .
  • the air cylinder 46 is attached with a piston position sensor (fully closed detector) 49 that detects the piston 46b when the rod 46a is contracted.
  • Piston position sensor 49 is a known sensor that detects the magnetic field of a magnet incorporated in piston 46b. A detection signal from the piston position sensor 49 is input to the control device 5 .
  • a gate opening/closing drive unit 9 (see FIG. 3, etc.) for opening and closing a gate plate pair 20 consisting of a pair of gate plates 21 and 22 is fixed to the gate drive unit 7 having an air cylinder 46 and to the gate plates 21 and 22. and a driving lever 32 attached to the rotating shafts 23 and 24 .
  • the opening/closing mechanism is a portion of the gate opening/closing drive unit 9 excluding the air cylinder 46, which is an actuator, and has a structure for opening and closing the pair of gate plates 21 and 22 in conjunction with the operation of the air cylinder 46. are doing.
  • FIGS. 7A to 7C The operation of the supply gate device 8 configured as described above will be further described with reference to FIGS. 7A to 7C.
  • 7A is a front view showing the state of the supply gate device 8 when the pair of gate plates 21 and 22 are fully open
  • FIG. 7B is a front view showing the state of the supply gate when the pair of gate plates 21 and 22 are fully closed.
  • 4 is a front view showing the state of the device 8
  • FIG. FIG. 7C is a front view showing the state of the supply gate device 8 when the operator's finger M is caught between the pair of gate plates 21 and 22 when the gate plates 21 and 22 are closed.
  • the supply gate 6 is indicated by a two-dot chain line for clarity of illustration.
  • the elevating plate 41 is moved up and down by the expansion and contraction of the air cylinder 46, and the two drive levers 32 rotate about the rotation shafts 23 and 24 in opposite directions to open and close the pair of gate plates 21 and 22.
  • the pair of gate plates 21 and 22 rotate in opposite directions about the rotation shafts 23 and 24, respectively, when opening and closing.
  • the gate plates 21 and 22 are in a horizontal state when fully closed, and rotate downward from the horizontal state when opened.
  • the piston position sensor 49 does not detect the piston 46b, but when the gate plates 21 and 22 are fully closed as shown in FIG. Detect the piston 46b.
  • the piston position sensor 49 is installed to detect that the gate plates 21 and 22 are fully closed, and when the gate plates 21 and 22 are fully closed as shown in FIG. It detects the piston 46 b and outputs a detection signal to the control device 5 . On the other hand, in the states of FIGS. 7A and 7C, the piston position sensor 49 does not output a detection signal.
  • the air cylinder 46 is arranged facing downward above the driving member 50, but the air cylinder 46 may be arranged below the driving member 50 facing upward.
  • the lift plate 41 is set to a predetermined lowered position when the rod 46a is in a predetermined contracted state, and is set to a predetermined raised position when the rod 46a is in a predetermined extended state.
  • the operation of this combination weigher is realized by the control of the control device 5 . That is, all the information necessary for the operation of the combination weigher is pre-stored in the storage section built in the control device 5, and all the information stored during the operation is also stored in the storage section of the control device 5.
  • the operator places a large amount of objects to be weighed on the workbench 12 in advance, and appropriately supplies the objects to be weighed to the supply port 13 .
  • the object to be weighed is, for example, a marine product such as shrimp, or an agricultural product.
  • control device 5 recognizes the weighing conveyor 1 to which the object to be weighed is supplied and the weight value of the object to be weighed based on the weight value of each weight sensor 2 .
  • the weighing value of the weight sensor 2 is compared with a preset reference value Wt. It is determined that the object to be weighed is supplied, and if the value is less than the reference value Wt, it is determined that the object to be weighed is not supplied.
  • the control device 5 controls when the weighing value of the weight sensor 2 is less than the reference value Wt when the conveying operation of the weighing conveyor 1 is stopped.
  • the air cylinder 46 is controlled to open the gate plates 21 and 22 of the supply gate 6 and to close the gate plates 21 and 22 if the reference value Wt or more.
  • the reference value Wt is stored in the control device 5 in advance.
  • the control device 5 drives the discharge conveyor 3.
  • the discharge conveyor 3 At the start of the operation, for example, all the gate plates 21 and 22 are open, all the weighing conveyors 1 are in a stopped state, and there are no objects to be weighed.
  • the control device 5 closes the gate plates 21 and 22 corresponding to the weighing conveyor 1 to which the objects to be weighed have been supplied. Thereafter, the objects to be weighed supplied from the operator to the supply port 13 are placed on the gate plates 21 and 22 .
  • the control device 5 performs the above-described combination processing based on the weight values of the objects to determine the discharge combination. Then, the weighing conveyor 1 selected for the discharge combination is driven for a predetermined time, and the objects to be weighed on the weighing conveyor 1 are conveyed to the discharge conveyor 3 . After the weighing conveyor 1 has been driven for a predetermined time and stopped, if the weighing value of the weight sensor 2 corresponding to the weighing conveyor 1 is less than the reference value Wt, the corresponding gate plates 21 and 22 are opened.
  • the gate plates 21 and 22 are closed. If the object to be weighed is not supplied onto the gate plates 21 and 22, the operator feeds the object to be weighed from the supply port 13 onto the weighing conveyor 1 that is in the stopped state, and the weight value of the weight sensor 2 is changed. becomes equal to or greater than the reference value Wt, the gate plates 21 and 22 are closed.
  • the discharge conveyor 3 conveys the objects to be weighed carried out from the weighing conveyor 1 and discharges them to the outside.
  • the discharged objects to be weighed may be supplied to a post-stage device such as a packaging machine, or may be received by another worker in a container or the like.
  • the gate plates 21 and 22 of the supply gate 6 are fully opened when no object to be weighed is supplied to the weighing conveyor 1. At this time, the object to be weighed supplied to the supply port 13 by the operator is conveyed. It is supplied to and held by the weighing conveyor 1 in the stopped state. Also, if the objects to be weighed are supplied to the weighing conveyor 1, the gate plates 21 and 22 are fully closed. retained. By supplying the objects to be weighed above the closed gate plates 21 and 22 in this manner, the next object to be weighed can be immediately supplied to the weighing conveyor 1 that has discharged the objects to be weighed. , productivity can be improved.
  • FIG. 8 is a flow chart showing an outline of the processing from the supply of the object to be weighed to any one weighing unit Cw to the calculation of its weight. This processing is executed by the control device 5 .
  • step S1 the weighing value of the weight sensor 2 becomes equal to or greater than the reference value Wt, and the process proceeds from step S1 to step S2. 46.
  • step S2 Immediately after starting the control of the air cylinder 46 in step S2, the control device 5 starts measuring the time until the gate plates 21 and 22 are fully closed, and the gate plates are closed within a predetermined time (t1). 21 and 22 are fully closed (Yes in step S3), wait for the weight value of the weight sensor 2 to stabilize, and then transfer the stable weight value to the object to be weighed on the weighing conveyor 1. is calculated as the weight value of (step S4).
  • step S3 when the detection signal is input from the piston position sensor 49, the control device 5 detects that the gate plates 21 and 22 are fully closed.
  • step S3 when the controller 5 does not detect that the gate plates 21 and 22 are fully closed within the first predetermined time t1 (No in step S3), the controller 5 fully opens the gate plates 21 and 22.
  • the air cylinder 46 is controlled as follows (step S5).
  • control device 5 measures the elapsed time immediately after starting the control of the air cylinder 46 in step S5. is controlled to fully close the air cylinder 46 again.
  • the above-mentioned first predetermined time t1 is a time slightly longer (eg, 0.3 to 0.4 seconds) than the normal operating time (eg, 0.2 seconds) for the gate plates 21 and 22 to change from the fully open state to the fully closed state. seconds) and stored in the controller 5 in advance. Further, the second predetermined time t2 is set in advance to, for example, about 1 to 5 seconds and stored in the control device 5. As shown in FIG.
  • step S5 the control device 5 controls the gate plates 21 and 22 to fully close again when the second predetermined time t2 elapses. Therefore, the operator can continue the operation of supplying the objects to be weighed without performing the return operation for closing the gate plates 21 and 22 .
  • the piston position sensor 49 is provided as a fully closed detection section that detects the fully closed state of the gate plates 21 and 22, but the present invention is not limited to this.
  • the full-closed detector may be a sensor that detects the operating position when the gate plates 21 and 22, which operate in conjunction with the operation of the gate plates 21 and 22, are in the fully closed state.
  • a rotary encoder 64 for detecting the rotational position of one of the rotating shafts 23 and 24 is provided as the fully closed detector. You may do so.
  • the rotary encoder 64 when the rotary encoder 64 detects the rotational position of the rotating shaft 23 when the gate plates 21 and 22 are fully closed, it outputs a detection signal to the control device 5 .
  • a sensor photoelectric sensor, proximity sensor, etc.
  • the fully closed detector may detect the operating position of the actuator (the position of the piston 46b of the air cylinder 46 in this example) when the gate plates 21 and 22 are fully closed.
  • the position of a predetermined portion of the opening/closing mechanism which is a portion of the gate opening/closing driving portion 9 excluding the air cylinder 46, may be detected.
  • the air cylinder 46 is used as the actuator, a motor may be used.
  • a sensor that detects the rotational position of the motor when the gate plates 21 and 22 are in the fully closed state may be used as the fully closed detector.
  • the fully closed detector may detect the position of a predetermined portion of the opening/closing mechanism when the gate plates 21 and 22 are fully closed.
  • FIG. 9A is a front view showing the state of the supply gate device 8 when the pair of gate plates 21 and 22 are in the fully open state when the gate drive section 7A of the modification is provided
  • FIG. FIG. 11 is a front view showing a state of the supply gate device 8 when a pair of gate plates 21 and 22 are in a fully closed state when provided with a driving portion 7A
  • FIG. 9C shows the supply gate when the operator's finger M is sandwiched between the pair of gate plates 21 and 22 when the pair of gate plates 21 and 22 are closed in the case where the gate driving unit 7A of the modified example is provided.
  • 4 is a front view showing the state of the device 8;
  • FIGS. 9A to 9C the supply gate 6 is indicated by a two-dot chain line for clarity of illustration.
  • the driving member 50A is generally composed of the driving plate 50a and the bearing portion 50c, and the compression coil spring 52 is attached to the lifting shaft 42, as described above. It differs from the gate driver 7 . A detailed description is given below.
  • a center portion of a long drive plate 50a is fixed to the tip of the rod 46a of the air cylinder 46.
  • the driving plate 50a is provided with bearings 50c that support the lifting shaft 42 so that it can move up and down, and through holes (not shown) through which the lifting shaft 42 is inserted.
  • a driving member 50A is composed of the driving plate 50a and the bearing portion 50c.
  • a retaining member 51 such as a washer is fixed to the lower end of the lifting shaft 42 so that the drive member 50A does not fall off from the lifting shaft 42 . Therefore, the two elevating shafts 42 pass through the driving member 50A and are connected to the driving member 50A so as to be vertically movable.
  • a retaining ring 53 is fixed at a predetermined position in the middle of the elevating shaft 42, and the compression coil spring 52 is supported between the retaining ring 53 and the bearing portion 50c with the elevating shaft 42 inserted therein. there is The compression coil spring 52 urges the elevating shaft 42 upward with respect to the driving member 50A.
  • the rod 46a of the air cylinder 46 is contracted and extended to raise and lower the drive member 50, thereby raising and lowering the two elevating shafts 42. , the elevating plate 41 and the elevating restricting plate 44 move up and down.
  • the full-close detection unit for detecting the full-close of the gate plates 21 and 22 is the above-described piston position. Sensor 49 cannot be used. Therefore, the above-mentioned rotary encoder 64 or a sensor (photoelectric sensor, proximity sensor, etc.) for detecting the position of the lifting plate 41, the lifting restriction plate 44, or the drive plate 50a when the gate plates 21 and 22 are in the fully closed state. is provided as the full-closed detector.
  • the weighing section Cw arranged below the gate plates 21 and 22 of each supply gate device 8 is composed of the weighing conveyor 1 and the weight sensor 2, but is not limited to this.
  • the weighing unit may be a combination weigher composed of a hopper and a weight sensor for measuring the weight of the objects to be weighed in the hopper.
  • the present invention is useful as a combination weigher or the like that can easily release the operator's fingers from the pair of gate plates when the operator's fingers are caught between the pair of gate plates.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)

Abstract

Provided is a combination balance whereby a finger of a worker can easily be released from between a gate plate pair when a finger of the worker is interposed between the gate plate pair. An example of this combination balance comprises a work stand in which a plurality of supply ports are formed, a gate plate pair (20) provided below the supply ports, a plurality of gate opening/closing drive units (9), a plurality of measurement units provided below the gate plate pair (20), a combination processing unit for determining a combination of objects to be measured such that the total weight thereof is within a target weight range, a gate control unit for controlling the gate opening/closing drive units (9) so as to close the gate plate pair (20) when an object to be measured is supplied to a measurement unit and open the gate plate pair (20) when an object to be measured is not supplied, and a full closure detection unit for detecting a fully closed state of the gate plate pair, the gate control unit performing control so as to open the gate plate pair (20) in a case in which the full closure detection unit does not detect a fully closed state of the gate plate pair within a first prescribed time from the start of control when the gate plate pair (20) has been controlled so as to close.

Description

組合せ秤combination weigher
　本発明は、作業者によって被計量物の供給が行われる組合せ秤に関する。 The present invention relates to a combination weigher in which objects to be weighed are supplied by an operator.
　特許文献１には、被計量物の供給が作業者によって行われ、被計量物の排出が自動で行われる組合せ秤が記載されている。 Patent Document 1 describes a combination weigher in which the objects to be weighed are supplied by an operator and the objects to be weighed are discharged automatically.
　この組合せ秤では、複数の計量コンベアを備え、被計量物が各計量コンベアに供給されて、被計量物の重量が計量される。そして、被計量物の合計重量が目標重量範囲内になる計量コンベアの組合せを求めて、求めた組合せの計量コンベアから被計量物を排出するようにしている。そして、各計量コンベアの上方には観音開き構造の一対のゲート板が配置されており、作業者は、一対のゲート板が開いているときには、被計量物を計量コンベア上に供給し、一対のゲート板が閉じているときには、被計量物をゲート板上に供給する。 This combination weigher is equipped with a plurality of weighing conveyors, the items to be weighed are supplied to each weighing conveyor, and the weight of the items to be weighed is measured. Then, a combination of weighing conveyors in which the total weight of the objects to be weighed falls within the target weight range is found, and the objects to be weighed are discharged from the weighing conveyors of the found combination. A pair of gate plates with a double-door structure is arranged above each weighing conveyor. When the pair of gate plates is open, an operator feeds an object to be weighed onto the weighing conveyor and moves the pair of gates. When the plate is closed, the object to be weighed is fed onto the gate plate.
特開２０１６－２１７７１４号公報JP 2016-217714 A
　上記特許文献１の組合せ秤は、付勢力を生ずる圧縮ばねが備えられてゲート板に噛みこんだ被計量物の損傷を軽減するようになっているが、閉じようとする一対のゲート板に手指を挟まれてしまう作業者の注意不足に対しては更なる改善の余地がある。 The combination weigher disclosed in Patent Document 1 is equipped with a compression spring that generates an urging force to reduce damage to the items to be weighed caught in the gate plates. There is room for further improvement with respect to the lack of attention on the part of the operator who is caught in the gap.
　本発明は上記のような課題を解決するためになされたもので、作業者の手指がゲート板対（一対のゲート板）に挟まれた場合に作業者の手指をゲート板対から容易に解放することができる組合せ秤を提供することを目的としている。 The present invention has been made to solve the above-mentioned problems, and when the fingers of an operator are caught between a pair of gate plates (a pair of gate plates), the fingers of the operator can be easily released from the pair of gate plates. An object of the present invention is to provide a combination weigher capable of
　上記目的を達成するために、本発明のある態様に係る組合せ秤は、作業者によって被計量物が供給される複数の供給口が開口された作業台と、各々、前記供給口と対応してその下方に設けられ、閉状態のときに供給される被計量物を保持し、下方に向かって開くことにより保持している被計量物が排出される複数のゲート板対と、各々、前記ゲート板対を開閉させる複数のゲート開閉駆動部と、各々、前記ゲート板対と対応してその下方に設けられ、上方から供給される被計量物を一時保持してその重量を計量し、保持した被計量物を排出する複数の計量部と、前記計量部で計量された重量に基づいて合計重量が目標重量範囲内となる被計量物の組合せを求める組合せ処理部と、前記計量部で計量された重量に基づいて前記計量部に被計量物が供給されているか否かを判断し、供給されているときには対応する前記ゲート板対を閉じ、供給されていないときには対応する前記ゲート板対を開くように前記ゲート開閉駆動部を制御するゲート制御部と、前記ゲート板対の全閉状態を検出する全閉検出部と、備え、前記ゲート制御部は、前記ゲート板対を閉じるように前記ゲート開閉駆動部を制御したときに、この制御開始から第１の所定時間内に前記全閉検出部がゲート板対の全閉状態を検出しない場合には、前記ゲート板対を開くように前記ゲート開閉駆動部を制御するよう構成されている。 In order to achieve the above object, a combination weigher according to an aspect of the present invention includes a workbench having a plurality of supply openings through which objects to be weighed are supplied by an operator, and a plurality of gate plate pairs provided below the gates to hold the objects to be weighed when closed and to discharge the held objects by opening downward; A plurality of gate opening/closing drive units for opening and closing the plate pair, each provided below the gate plate pair corresponding to the gate plate pair, temporarily holding an object to be weighed supplied from above, weighing the weight of the object, and holding the object. a plurality of weighing units for discharging objects to be weighed; a combination processing unit for determining a combination of the objects to be weighed whose total weight is within a target weight range based on the weights weighed by the weighing units; Based on the weight obtained, it is determined whether or not the object to be weighed is supplied to the weighing unit, and when the object is supplied, the corresponding gate plate pair is closed, and when the object is not supplied, the corresponding gate plate pair is opened. and a full-close detection unit for detecting a fully-closed state of the gate plate pair, wherein the gate control unit closes the gate plate pair so as to close the gate. When the opening/closing drive unit is controlled, if the fully closed detection unit does not detect the fully closed state of the gate plate pair within the first predetermined time from the start of control, the gate is operated to open the gate plate pair. It is configured to control the opening and closing drive.
　この構成によれば、ゲート制御部がゲート板対を閉じるようにゲート開閉駆動部を制御したときに、作業者の注意不足によって手指をゲート板対に挟まれて第１の所定時間内に全閉検出部がゲート板対の全閉状態を検出できない場合には、ゲート板対を開くようにゲート開閉駆動部を制御する。よって、作業者の手指がゲート板対に挟まれた場合に作業者の手指を容易に解放することができる。 According to this configuration, when the gate control unit controls the gate opening/closing driving unit to close the gate plate pair, the operator's lack of attention can cause the operator's finger to be caught between the gate plate pair, and the operator's fingers may be completely removed within the first predetermined time. When the close detection section cannot detect the fully closed state of the gate plate pair, the gate opening/closing drive section is controlled to open the gate plate pair. Therefore, when the operator's fingers are caught between the pair of gate plates, the operator's fingers can be easily released.
　前記ゲート制御部は、前記第１の所定時間内に前記全閉検出部がゲート板対の全閉状態を検出しない場合に前記ゲート板対を開くように前記ゲート開閉駆動部を制御した後、第２の所定時間経過後に前記ゲート板対を閉じるように前記ゲート開閉駆動部を制御するよう構成されていてもよい。 After the gate control unit controls the gate opening/closing driving unit to open the gate plate pair when the fully closed state detection unit does not detect the fully closed state of the gate plate pair within the first predetermined time, The gate opening/closing driving section may be controlled to close the gate plate pair after a second predetermined time has elapsed.
　この構成によれば、作業者は、ゲート板対を閉じるための復帰操作を行うことなく、被計量物を供給する作業を継続して行うことができる。 According to this configuration, the operator can continue the work of supplying the objects to be weighed without performing the return operation for closing the gate plate pair.
　前記ゲート開閉駆動部は、前記ゲート制御部によって動作が制御されるアクチュエータと、前記アクチュエータの動作に連動して前記ゲート板対を開閉させる開閉機構部と、を有し、前記全閉検出部は、前記アクチュエータの動作位置に基づいて前記ゲート板対の全閉状態を検出するよう構成されていてもよい。 The gate opening/closing drive unit has an actuator whose operation is controlled by the gate control unit, and an opening/closing mechanism unit that opens and closes the gate plate pair in conjunction with the operation of the actuator. , the fully closed state of the gate plate pair may be detected based on the operating position of the actuator.
　前記ゲート開閉駆動部は、前記ゲート制御部によって動作が制御されるアクチュエータと、前記アクチュエータの動作に連動して前記ゲート板対を開閉させる開閉機構部と、を有し、前記全閉検出部は、前記開閉機構部の所定部位の位置を検出することで前記ゲート板対が全閉状態を検出するよう構成されていてもよい。 The gate opening/closing drive unit has an actuator whose operation is controlled by the gate control unit, and an opening/closing mechanism unit that opens and closes the gate plate pair in conjunction with the operation of the actuator. The gate plate pair may be configured to detect the fully closed state by detecting the position of a predetermined portion of the opening/closing mechanism.
　前記計量部は、前記ゲート板対と対応してその下方に設けられ、上方から供給される被計量物を搬送停止状態で一時保持し、保持した被計量物を搬出する計量コンベアと、前記計量コンベアに取り付けられ、前記計量コンベア上の被計量物の重量を計量する重量センサとから構成され、前記組合せ処理部により求められた組合せの被計量物を保持している前記計量コンベアから搬出される被計量物が供給され、供給される被計量物を搬送して外部へ排出する排出コンベアを、さらに備えていてもよい。 The weighing unit is provided below the pair of gate plates in correspondence with the weighing conveyor, temporarily holds an object to be weighed supplied from above in a state in which conveyance is stopped, and carries out the held object to be weighed; and a weight sensor attached to the conveyor for measuring the weight of the objects to be weighed on the weighing conveyor. A discharge conveyor, to which the objects to be weighed are supplied, may be further provided for conveying the supplied objects to be weighed and discharging them to the outside.
　本発明は、以上に説明した構成を有し、作業者の手指がゲート板対に挟まれた場合に作業者の手指をゲート板対から容易に解放することができる組合せ秤を提供することができるという効果を奏する。 The present invention provides a combination weigher that has the above-described configuration and can easily release the operator's fingers from the pair of gate plates when the operator's fingers are caught between the pair of gate plates. It has the effect of being able to
　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。 The above object, other objects, features, and advantages of the present invention will be made clear from the following detailed description of preferred embodiments with reference to the accompanying drawings.
図１Ａは、本実施形態の一例の組合せ秤を上から見た概略平面図である。FIG. 1A is a schematic plan view of a combination weigher as an example of the present embodiment, viewed from above. 図１Ｂは、組合せ秤の概略正面図である。FIG. 1B is a schematic front view of a combination weigher. 図１Ｃは、組合せ秤の概略側面図である。FIG. 1C is a schematic side view of the combination balance. 図２は、組合せ秤の外観の斜視図である。FIG. 2 is a perspective view of the appearance of the combination weigher. 図３は、組合せ秤に備えられた複数の供給ゲート装置の一例を示す斜視図である。FIG. 3 is a perspective view showing an example of a plurality of supply gate devices provided in the combination weigher. 図４Ａは、供給ゲートを上から見た平面図である。FIG. 4A is a top plan view of the supply gate. 図４Ｂは、供給ゲートの側面図である。FIG. 4B is a side view of the supply gate. 図４Ｃは、図４Ｂにおいて、供給ゲートを左側から見た図である。FIG. 4C is a view of the supply gate viewed from the left side in FIG. 4B. 図５Ａは、供給ゲート及びその取付け部分の側面図である。FIG. 5A is a side view of the feed gate and its attachment. 図５Ｂは、図５Ａにおいて、供給ゲート及びその取付け部分を左側から見た図である。5B is a left side view of the supply gate and its mounting portion in FIG. 5A. 図５Ｃは、供給ゲートを取り付ける様子を示す側面図である。FIG. 5C is a side view showing how the supply gate is attached. 図６Ａは、ゲート駆動部の正面図である。FIG. 6A is a front view of the gate driver. 図６Ｂは、ゲート駆動部の側面図である。FIG. 6B is a side view of the gate driver. 図７Ａは、一対のゲート板が全開状態のときの供給ゲート装置の状態を示す正面図である。FIG. 7A is a front view showing the state of the supply gate device when the pair of gate plates are fully open. 図７Ｂは、一対のゲート板が全閉状態のときの供給ゲート装置の状態を示す正面図である。FIG. 7B is a front view showing the state of the supply gate device when the pair of gate plates are in the fully closed state. 図７Ｃは、一対のゲート板が閉じるときにゲート板の間に作業者の手指が挟まれたときの供給ゲート装置の状態を示す正面図である。FIG. 7C is a front view showing the state of the supply gate device when the operator's fingers are caught between the pair of gate plates when they are closed. 図８は、任意の１つの計量部に対して被計量物が供給されてからその重量の算出が行われるまでの処理の概略を示すフローチャートである。FIG. 8 is a flow chart showing an outline of the processing from the supply of the object to be weighed to any one weighing unit to the calculation of the weight of the object. 図９Ａは、変形例のゲート駆動部を備えた場合の一対のゲート板が全開状態のときの供給ゲート装置の状態を示す正面図である。FIG. 9A is a front view showing a state of the supply gate device when a pair of gate plates are in a fully open state when the gate driving section of the modified example is provided. 図９Ｂは、変形例のゲート駆動部を備えた場合の一対のゲート板が全閉状態のときの供給ゲート装置の状態を示す正面図である。FIG. 9B is a front view showing the state of the supply gate device when the pair of gate plates are in the fully closed state when the modified gate driving section is provided. 図９Ｃは、変形例のゲート駆動部を備えた場合の一対のゲート板が閉じるときにゲート板の間に作業者の手指が挟まれたときの供給ゲート装置の状態を示す正面図である。FIG. 9C is a front view showing the state of the supply gate device when the operator's fingers are caught between the pair of gate plates when the gate drive unit of the modified example is provided and the fingers are caught between the gate plates.
　以下、本発明の好ましい実施の形態を、図面を参照しながら説明する。なお、以下では全ての図面を通じて同一又は相当する要素には同一の参照符号を付して、その重複する説明を省略する。また、本発明は、以下の実施形態に限定されない。 Preferred embodiments of the present invention will be described below with reference to the drawings. In the following description, the same reference numerals are given to the same or corresponding elements throughout all the drawings, and duplicate descriptions thereof will be omitted. Moreover, the present invention is not limited to the following embodiments.
　（実施形態）
　図１Ａは本実施形態の一例の組合せ秤を上から見た概略平面図であり、図１Ｂは同組合せ秤の概略正面図であり、図１Ｃは同組合せ秤の概略側面図である。図２は同組合せ秤の外観の斜視図である。 (embodiment)
FIG. 1A is a schematic plan view of a combination weigher as an example of the present embodiment viewed from above, FIG. 1B is a schematic front view of the combination balance, and FIG. 1C is a schematic side view of the combination balance. FIG. 2 is a perspective view of the appearance of the same combination weigher.
　本実施形態の一例の組合せ秤は、複数の供給口１３が設けられた作業台１２と、各供給口１３の直下に設けられたゲート板対２０（ゲート板２１，２２）を有する複数の供給ゲート６と、各供給ゲート６のゲート板対２０の直下に設けられた複数の計量部Ｃｗと、排出コンベア３と、操作表示器４と、制御装置５などを備えている。 A combination weigher according to an example of the present embodiment includes a workbench 12 provided with a plurality of supply ports 13 and a plurality of supply ports 12 having gate plate pairs 20 (gate plates 21 and 22) provided directly below each supply port 13. It includes a gate 6, a plurality of weighing units Cw provided directly below the gate plate pairs 20 of each supply gate 6, a discharge conveyor 3, an operation display 4, a control device 5, and the like.
　ここでは、排出コンベア３の両側に計量部Ｃｗが複数個ずつ配置されている。各計量部Ｃｗは、ベルトコンベアで構成される計量コンベア１と、計量コンベア１を支持するロードセル等からなる重量センサ２とを備えている。計量コンベア１は、被計量物を一方向（矢印ａまたはｂの方向）へ搬送する。重量センサ２は、計量コンベア１上の被計量物の重量を計量し、この計量値を制御装置５へ出力する。排出コンベア３は、ベルトコンベアで構成される搬送コンベアであり、例えば矢印ｃの方向へ被計量物を搬送する。 Here, a plurality of weighing units Cw are arranged on both sides of the discharge conveyor 3 . Each weighing unit Cw includes a weighing conveyor 1 configured by a belt conveyor and a weight sensor 2 configured by a load cell or the like for supporting the weighing conveyor 1 . A weighing conveyor 1 conveys an object to be weighed in one direction (direction of arrow a or b). The weight sensor 2 measures the weight of the object to be weighed on the weighing conveyor 1 and outputs the measured value to the control device 5 . The discharge conveyor 3 is a conveyor configured by a belt conveyor, and conveys the objects to be weighed in the direction of arrow c, for example.
　排出コンベア３の一方の側方に配置された複数個の計量コンベア１は、互いに並行に配置され、これら各々の搬送方向（矢印ａの方向）が排出コンベア３の搬送方向（矢印ｃの方向）と交差（本例では直交）するように配置されている。また、排出コンベア３の他方の側方に配置された複数個の計量コンベア１も、互いに並行に配置され、これら各々の搬送方向（矢印ｂの方向）が排出コンベア３の搬送方向（矢印ｃの方向）と交差（本例では直交）するように配置されている。 A plurality of weighing conveyors 1 arranged on one side of the discharging conveyor 3 are arranged in parallel with each other, and the conveying direction of each of them (the direction of arrow a) is the conveying direction of the discharging conveyor 3 (the direction of arrow c). are arranged so as to cross (perpendicularly in this example) the . In addition, a plurality of weighing conveyors 1 arranged on the other side of discharge conveyor 3 are also arranged in parallel with each other, and the conveying direction of each of them (the direction of arrow b) coincides with the conveying direction of discharge conveyor 3 (the direction of arrow c). direction) and intersect (perpendicular in this example).
　排出コンベア３の下方には電装品収納部１０が備えられ、この電装品収納部１０には、制御装置５の他、複数の計量コンベア１及び排出コンベア３のコンベア駆動回路等が収納されている。 An electrical component storage unit 10 is provided below the discharge conveyor 3. In addition to the control device 5, the electrical component storage unit 10 houses a plurality of weighing conveyors 1 and a conveyor drive circuit for the discharge conveyor 3. .
　この組合せ秤の装置上部、すなわち、全ての計量コンベア１及び排出コンベア３の上方には、作業台１２が配置されている。この作業台１２は、２つの分割作業台１２ａ，１２ｂからなり、両側の側板１１ａ，１１ｂ及び所定の支持部材１５上に載置され、着脱可能である。そして、作業台１２には、各々の計量コンベア１の直上の位置に、方形（例えば矩形）の開口部からなる供給口１３が設けられている。そして、図２に示すように、各供給口１３には、その方形の開口縁１３ｅからゲート板対２０へ向かうように下方へ延びる短い筒状の開口周縁部１３ａが設けられている。 A workbench 12 is arranged above the device of this combination weigher, that is, above all the weighing conveyors 1 and discharge conveyors 3 . The worktable 12 is composed of two divided worktables 12a and 12b, which are mounted on side plates 11a and 11b on both sides and a predetermined support member 15 and are detachable. The workbench 12 is provided with a supply port 13 having a square (for example, rectangular) opening at a position directly above each weighing conveyor 1 . As shown in FIG. 2, each supply port 13 is provided with a short cylindrical opening edge portion 13a extending downward toward the gate plate pair 20 from the square opening edge 13e.
　そして、各々の供給口１３に対して供給ゲート６が設けられている。各々の供給ゲート６は、供給口１３を開閉するための観音開き構造の一対のゲート板２１，２２からなるゲート板対２０を備えている。このゲート板対２０は供給口１３の直下に配置されている。そして、ゲート板対２０の直下に計量コンベア１が配置されている。供給口１３とゲート板対２０と計量コンベア１とはそれぞれ対応して設けられている。 A supply gate 6 is provided for each supply port 13 . Each supply gate 6 is provided with a gate plate pair 20 consisting of a pair of gate plates 21 and 22 having a double-door structure for opening and closing the supply port 13 . This gate plate pair 20 is arranged directly below the supply port 13 . A weighing conveyor 1 is arranged directly below the gate plate pair 20 . The supply port 13, the gate plate pair 20, and the weighing conveyor 1 are provided in correspondence with each other.
　図２に示されるように、ゲート板対２０は、作業台１２の平板部分の表面よりも若干下方に配置されており、供給口１３に開口周縁部１３ａを有しているため、ゲート板対２０上に供給された被計量物がゲート板対２０からこぼれない。よって、ゲート板対２０上での被計量物の良好な保持が可能になる。なお、供給ゲート６のさらなる詳細については後述する。 As shown in FIG. 2, the gate plate pair 20 is arranged slightly below the surface of the flat plate portion of the workbench 12 and has an opening peripheral portion 13a at the supply port 13, so that the gate plate pair The object to be weighed supplied onto 20 does not spill from the gate plate pair 20. - 特許庁Therefore, the objects to be weighed can be well held on the gate plate pair 20 . Further details of the supply gate 6 will be described later.
　制御装置５は、例えばマイクロコントローラ等によって構成され、組合せ秤の全体の制御を行う。例えば、制御装置５は、ゲート制御部として機能し、エアシリンダ４６（図３等）の動作を制御することによって各供給ゲート６のゲート板２１，２２の開閉を制御する。また、制御装置５は、各計量コンベア１及び排出コンベア３の搬送動作を制御する。また、制御装置５は、各重量センサ２からその計量値を入力する。また、制御装置５は、操作表示器４から信号が入力されるとともに、操作表示器４へ表示するデータ等の信号を出力する。なお、制御装置５は、必ずしも単独の制御装置で構成される必要はなく、互いに協働して分散制御する複数の制御装置によって構成されていてもよい。 The control device 5 is composed of, for example, a microcontroller or the like, and controls the entire combination weigher. For example, the control device 5 functions as a gate control section and controls the opening and closing of the gate plates 21 and 22 of each supply gate 6 by controlling the operation of the air cylinder 46 (FIG. 3, etc.). The control device 5 also controls the conveying operations of each weighing conveyor 1 and discharge conveyor 3 . Also, the controller 5 inputs the measured value from each weight sensor 2 . The control device 5 also receives signals from the operation display 4 and outputs signals such as data to be displayed on the operation display 4 . Note that the control device 5 does not necessarily have to be composed of a single control device, and may be composed of a plurality of control devices that cooperate with each other and perform distributed control.
　また、制御装置５は、組合せ処理部としても機能し、所定の組合せ条件に基づいて被計量物を排出する計量コンベア１の組合せである排出組合せを求める組合せ処理を行う。この組合せ処理では、各重量センサ２の計量値から得られる各計量コンベア１上の被計量物の重量に基づいて組合せ演算を行い、供給されている被計量物の合計重量値（組合せ重量値）が目標重量範囲（目標重量値に対する許容範囲）内になる計量コンベア１の組合せを１つ求めてそれを排出組合せに決める。例えば、組合せ重量値が目標重量値以上となる組合せの中から、組合せ重量値が目標重量値となるかそれに最も近い組合せを排出組合せに決める。なお、ここでは、排出組合せとして、計量コンベア１の組合せを求めることとしたが、これは、合計重量が目標重量範囲内になる被計量物の組合せを求めることに相当する。 The control device 5 also functions as a combination processing unit, and performs combination processing to obtain a discharge combination, which is a combination of the weighing conveyors 1 that discharge the objects to be weighed, based on predetermined combination conditions. In this combination processing, a combination calculation is performed based on the weight of the objects to be weighed on each weighing conveyor 1 obtained from the weight values of the weight sensors 2, and the total weight value of the supplied objects to be weighed (combined weight value) is calculated. is within the target weight range (permissible range for the target weight value), and it is determined as the discharge combination. For example, among the combinations whose combination weight value is equal to or greater than the target weight value, the combination whose combination weight value is equal to or closest to the target weight value is determined as the discharge combination. Here, the combination of weighing conveyors 1 is obtained as the discharge combination, but this corresponds to obtaining the combination of objects whose total weight is within the target weight range.
　操作表示器４は、例えばタッチスクリーン式のディスプレイ画面を備え、この画面上で、組合せ秤の運転の開始及び停止等の操作や、運転に関する種々の設定等を行うことができる。 The operation display 4 has, for example, a touch screen type display screen, on which operations such as starting and stopping the operation of the combination weigher and various settings related to operation can be performed.
　次に、供給ゲート６及びそれを駆動するゲート駆動部からなる供給ゲート装置の構成について、詳細に説明する。 Next, the configuration of the supply gate device consisting of the supply gate 6 and a gate driving section for driving it will be described in detail.
　図３は、組合せ秤に備えられた複数の供給ゲート装置の一例を示す斜視図である。図３では、作業台１２及び両側の側板１１ａ，１１ｂなどは図示されていない。また、図３では、主に複数の供給ゲート６及びゲート駆動部７の配置構成を示す斜視図と、ある１つのゲート駆動部７の拡大斜視図とが示されている。各々の供給ゲート６に対応してゲート駆動部７が備えられており、対応する供給ゲート６とゲート駆動部７とによって、供給ゲート装置８が構成されている。 FIG. 3 is a perspective view showing an example of a plurality of supply gate devices provided in a combination weigher. In FIG. 3, the workbench 12 and the side plates 11a and 11b on both sides are not shown. 3 mainly shows a perspective view showing the arrangement configuration of a plurality of supply gates 6 and gate drive units 7, and an enlarged perspective view of one gate drive unit 7. As shown in FIG. A gate drive section 7 is provided corresponding to each supply gate 6 , and a supply gate device 8 is configured by the corresponding supply gate 6 and gate drive section 7 .
　まず、供給ゲート６の詳細について説明する。図４Ａは、供給ゲート６を上から見た平面図であり、図４Ｂは、供給ゲート６の側面図であり、図４Ｃは、図４Ｂにおいて、供給ゲート６を左側から見た図である。また、図５Ａは、供給ゲート６及びその取付け部分の側面図であり、図５Ｂは、図５Ａにおいて、供給ゲート６及びその取付け部分を左側から見た図である。図５Ｃは、供給ゲート６を取り付ける様子を示す側面図である。この図５Ａ～図５Ｃでは、ゲート板２１，２２が開いているときの状態（全開状態）が示されている。 First, the details of the supply gate 6 will be described. 4A is a top plan view of the supply gate 6, FIG. 4B is a side view of the supply gate 6, and FIG. 4C is a left side view of the supply gate 6 in FIG. 4B. 5A is a side view of the supply gate 6 and its mounting portion, and FIG. 5B is a left side view of the supply gate 6 and its mounting portion in FIG. 5A. FIG. 5C is a side view showing how the supply gate 6 is attached. 5A to 5C show the state when the gate plates 21 and 22 are open (fully open state).
　図４Ａ～図４Ｃに示すように、供給ゲート６は、回動軸２３，２４が回動することによって開閉動作する一対のゲート板２１，２２を備えている。一対のゲート板２１，２２は、全閉状態のときにはそれぞれ水平状態となって、ゲート板２１，２２上に被計量物を保持することができる。そして、ゲート板２１，２２が図４Ｃに示す矢印ｄ、ｅの方向へ回動して開いたときには、保持している被計量物が下方へ排出されて計量コンベア１へ供給される。 As shown in FIGS. 4A to 4C, the supply gate 6 has a pair of gate plates 21 and 22 that open and close by rotating the rotating shafts 23 and 24. As shown in FIGS. When the gate plates 21 and 22 are in the fully closed state, the gate plates 21 and 22 are in a horizontal state, respectively, and the objects to be weighed can be held on the gate plates 21 and 22 . Then, when the gate plates 21 and 22 are rotated in the directions of arrows d and e shown in FIG.
　各ゲート板２１，２２は、互いに平行に配設された水平あるいは略水平な回動軸２３，２４に固定されている。図４Ａ，図４Ｂの実線及び図４Ｃの破線で示されたゲート板２１，２２は、全閉状態が示されており、図４Ｂ，図４Ｃの二点鎖線で示されたゲート板２１，２２は、全開状態が示されている。 Each gate plate 21, 22 is fixed to horizontal or substantially horizontal rotating shafts 23, 24 arranged parallel to each other. Gate plates 21 and 22 indicated by solid lines in FIGS. 4A and 4B and dashed lines in FIG. 4C are shown in a fully closed state. is shown fully open.
　各回動軸２３，２４の一端には駆動レバー３２が取り付けられている。駆動レバー３２は、連結板２９、ピン３０及びローラ３１によって構成されている。各回動軸２３，２４の一端に連結板２９の一端が固定され、連結板２９の他端にピン３０が突設され、このピン３０に円筒状のローラ３１が回転自在に取り付けられている。 A driving lever 32 is attached to one end of each of the rotating shafts 23 and 24 . The drive lever 32 is composed of the connecting plate 29 , the pin 30 and the roller 31 . One end of a connecting plate 29 is fixed to one end of each of the rotary shafts 23 and 24, a pin 30 is projected from the other end of the connecting plate 29, and a cylindrical roller 31 is rotatably attached to the pin 30. As shown in FIG.
　各回動軸２３，２４の一端側の部分が、支持プレート２５の鉛直支持部２５ａに回動自在に支持されている。また、各回動軸２３，２４の他端側の部分が、支持プレート２６の鉛直部分に回動自在に支持されている。ここで、２つの回動軸２３，２４は、平行となるように、支持プレート２５，２６に回動自在に支持されている。また、２つの支持プレート２５，２６は２本の連結棒（例えば角棒）２７，２８で連結されている。２つの支持プレート２５，２６及び２本の連結棒２７，２８によって、回動軸支持部材３３が構成されている。 A portion on one end side of each of the rotating shafts 23 and 24 is rotatably supported by the vertical support portion 25a of the support plate 25. In addition, the other end portions of the rotating shafts 23 and 24 are rotatably supported by the vertical portion of the support plate 26 . Here, the two rotating shafts 23 and 24 are rotatably supported by support plates 25 and 26 so as to be parallel. Also, the two support plates 25 and 26 are connected by two connecting rods (for example, square rods) 27 and 28 . A rotation shaft support member 33 is configured by the two support plates 25 and 26 and the two connecting rods 27 and 28 .
　支持プレート２５には、鉛直支持部２５ａの両側に側板部２５ｂが備えられている。そして、２つの側板部２５ｂには、それぞれ、取付用凹部２５ｃ，２５ｄが形成されている。 The support plate 25 is provided with side plate portions 25b on both sides of the vertical support portion 25a. Mounting recesses 25c and 25d are formed in the two side plate portions 25b, respectively.
　また、連結棒２７，２８の一端にはストッパ部材ＳＴが取り付けられており、ゲート板２１，２２が開いたときに駆動レバー３２の連結板２９がストッパ部材ＳＴに当接し、ゲート板２１，２２が開きすぎないようになっている。 A stopper member ST is attached to one end of the connecting rods 27 and 28, and when the gate plates 21 and 22 are opened, the connecting plate 29 of the driving lever 32 abuts against the stopper member ST and the gate plates 21 and 22 are closed. is designed not to open too much.
　以上のように、供給ゲート６は、ゲート板２１，２２と、回動軸２３，２４と、２つの駆動レバー３２と、支持プレート２５，２６及び連結棒２７，２８からなる回動軸支持部材３３と、ストッパ部材ＳＴとを備えている。 As described above, the supply gate 6 is a rotating shaft supporting member composed of the gate plates 21 and 22, the rotating shafts 23 and 24, the two driving levers 32, the supporting plates 25 and 26, and the connecting rods 27 and 28. 33 and a stopper member ST.
　そして、作業台１２の下方には、図５Ａ，図５Ｂに示すように、計量コンベア１の搬送方向の上流端側の上方において、供給ゲート６を着脱自在に取り付けるための一対の供給ゲート取付部材３８が、適宜の支持部材３９に固定されて設けられている。供給ゲート６は、計量コンベア１の搬送方向上流側に支持プレート２５が配置され、下流側に支持プレート２６が配置されるようにして、供給ゲート取付部材３８に取り付けられる。 5A and 5B, a pair of supply gate mounting members for detachably mounting the supply gate 6 above the upstream end side in the conveying direction of the weighing conveyor 1 are provided below the workbench 12, as shown in FIGS. 38 are provided secured to suitable support members 39 . The supply gate 6 is attached to the supply gate attachment member 38 so that the support plate 25 is arranged on the upstream side in the conveying direction of the weighing conveyor 1 and the support plate 26 is arranged on the downstream side.
　各供給ゲート取付部材３８は、所定形状の取付板３５に、支持プレート２５の取付用凹部２５ｃ，２５ｄと係合自在な２つのピン３６，３７が突設されて構成されている。 Each supply gate mounting member 38 is constructed by projecting two pins 36 and 37 that are engageable with mounting recesses 25 c and 25 d of the support plate 25 from a mounting plate 35 of a predetermined shape.
　そして、両方の供給ゲート取付部材３８の上方のピン３６のくびれ部分３６ａに、支持プレート２５の両方の側板部２５ｂの取付用凹部２５ｃが嵌められるとともに、両方の供給ゲート取付部材３８の下方のピン３７のくびれ部分３７ａに、支持プレート２５の両方の側板部２５ｂの取付用凹部２５ｄが嵌められることにより、供給ゲート６が取り付けられている。ここで、供給ゲート６自体の重量によって、供給ゲート取付部材３８の下方のピン３７には下向きの力が加わり、上方のピン３６には上向きの力が加わって、供給ゲート６が片持ち状態で保持されている。 Mounting recesses 25c of both side plate portions 25b of the support plate 25 are fitted into the constricted portions 36a of the upper pins 36 of both of the supply gate mounting members 38, and the lower pins of both of the supply gate mounting members 38 are fitted. The supply gate 6 is attached by fitting the mounting recesses 25d of both side plate portions 25b of the support plate 25 into the constricted portions 37a of the support plate 25. As shown in FIG. Here, due to the weight of the supply gate 6 itself, a downward force is applied to the lower pin 37 of the supply gate mounting member 38, and an upward force is applied to the upper pin 36, so that the supply gate 6 is in a cantilevered state. held.
　例えば、作業者が供給ゲート６を取り付ける際には、一方の支持プレート２６を手で持って取り付ける。このとき、ゲート板２１，２２はその自重によって開いた状態となる。この状態で、図５Ｃのように供給ゲート６を斜めにして、他方の支持プレート２５の両側の取付用凹部２５ｃを、両方の供給ゲート取付部材３８のピン３６のくびれ部分３６ａに嵌めた後、支持プレート２６側を下げればよい。すると、昇降板４１と昇降規制板４４との間に２つの駆動レバー３２のローラ３１が挿入されて、他方の支持プレート２５の両側の取付用凹部２５ｄが、両方の供給ゲート取付部材３８のピン３７のくびれ部分３７ａに嵌まって、供給ゲート６を取り付けることができる。また、供給ゲート６を取り外す際には、作業者が一方の支持プレート２６を手で持って斜め上方へ引き出すことにより、供給ゲート６を取り外すことができる。 For example, when the worker installs the supply gate 6, he/she holds one support plate 26 by hand and installs it. At this time, the gate plates 21 and 22 are opened by their own weight. In this state, the supply gate 6 is tilted as shown in FIG. 5C, and after fitting the mounting recesses 25c on both sides of the other support plate 25 to the constricted portions 36a of the pins 36 of both supply gate mounting members 38, The support plate 26 side should be lowered. Then, the rollers 31 of the two drive levers 32 are inserted between the lift plate 41 and the lift restricting plate 44, and the mounting recesses 25d on both sides of the other support plate 25 engage the pins of both supply gate mounting members 38. The feed gate 6 can be attached by fitting into the constricted portion 37a of 37 . When removing the supply gate 6, the operator can remove the supply gate 6 by holding one of the support plates 26 and pulling it out obliquely upward.
　なお、供給ゲート６の着脱が行われる際には、昇降板４１の位置がゲート板２１，２２が全開状態となる所定の下降位置に保持されるように構成されている。なお、図５Ｂにおいて、二点鎖線で示されたピン３６，３７は、隣の供給ゲート６を取り付けるためのものである。 When the supply gate 6 is attached and detached, the elevator plate 41 is held at a predetermined lowered position where the gate plates 21 and 22 are fully opened. In FIG. 5B, the pins 36 and 37 indicated by two-dot chain lines are for attaching the adjacent supply gate 6 .
　供給ゲート６が供給ゲート取付部材３８に取り付けられているときには、図５Ａ，図５Ｂに示されるように、昇降板４１上に、２つの駆動レバー３２のローラ３１が載った状態となる。 When the supply gate 6 is attached to the supply gate attachment member 38, the rollers 31 of the two drive levers 32 are placed on the lift plate 41 as shown in FIGS. 5A and 5B.
　昇降板４１の上下（昇降）運動によって供給ゲート６のゲート板２１，２２の開閉動作が行われる。次に、昇降板４１を有するゲート駆動部７の詳細について、さらに図６Ａ及び図６Ｂも参照して説明する。図６Ａは、ゲート駆動部７の正面図（図５Ｂと同方向から見た図）であり、図６Ｂは、ゲート駆動部７の側面図である。 The opening and closing operations of the gate plates 21 and 22 of the supply gate 6 are performed by the vertical (lifting) movement of the lifting plate 41 . Next, details of the gate driver 7 having the lift plate 41 will be described with reference to FIGS. 6A and 6B. 6A is a front view of the gate driver 7 (viewed from the same direction as in FIG. 5B), and FIG. 6B is a side view of the gate driver 7. FIG.
　このゲート駆動部７は、計量コンベア１の上流端側の近傍に設けられており、昇降板４１、２つの昇降軸４２、２つの連結軸４３、昇降規制板４４、給気口４６ｄを有するエアシリンダ４６、及び駆動部材５０等を有している。 The gate drive unit 7 is provided near the upstream end of the weighing conveyor 1, and includes an elevating plate 41, two elevating shafts 42, two connecting shafts 43, an elevating control plate 44, and an air inlet having an air supply port 46d. It has a cylinder 46, a drive member 50, and the like.
　昇降板４１は、下方へ延びる２本の昇降軸４２の上端に固定されており、昇降板４１の直上に、２本の連結軸４３を介して昇降規制板４４が固定されている。ここで、昇降板４１と昇降規制板４４との間隔は、駆動レバー３２のローラ３１の直径より少し大きい間隔となるように定めており、昇降板４１と昇降規制板４４との間に２つの駆動レバー３２のローラ３１が配置される。 The elevating plate 41 is fixed to the upper ends of two elevating shafts 42 extending downward, and an elevating restriction plate 44 is fixed directly above the elevating plate 41 via two connecting shafts 43 . Here, the distance between the lift plate 41 and the lift restriction plate 44 is determined to be slightly larger than the diameter of the roller 31 of the drive lever 32. A roller 31 of a drive lever 32 is arranged.
　エアシリンダ４６は、シリンダチューブ４６ｃ、シリンダチューブ４６ｃ内に配置されるピストン４６ｂ、及びピストン４６ｂに接続されたロッド４６ａを有する。エアシリンダ４６は、ロッド４６ａの露出側にフランジ４８が取り付けられており、フランジ４８が２本の棒状の取付部材４７の下端部に固定されている。２本の取付部材４７の上端部は、シールボックス４５とともに、シリンダ収納ボックス１６の上端部に固定されている。ここで、シールボックス４５はシリンダ収納ボックス１６の上部に固定されている。シールボックス４５には、昇降軸４２を昇降自在に支持するとともにシリンダ収納ボックス１６内に水等が浸入しないように、ダストシール６１、ロッド用パッキン６２及びＯリング６３が設けられている。 The air cylinder 46 has a cylinder tube 46c, a piston 46b arranged in the cylinder tube 46c, and a rod 46a connected to the piston 46b. The air cylinder 46 has a flange 48 attached to the exposed side of the rod 46 a , and the flange 48 is fixed to the lower ends of two rod-like attachment members 47 . The upper ends of the two mounting members 47 are fixed to the upper end of the cylinder storage box 16 together with the seal box 45 . Here, the seal box 45 is fixed to the upper part of the cylinder storage box 16 . The seal box 45 is provided with a dust seal 61 , a rod packing 62 and an O-ring 63 to support the elevating shaft 42 so as to be able to move up and down and prevent water from entering the cylinder housing box 16 .
　エアシリンダ４６のロッド４６ａの先端には、長板状の駆動板５０ａの中央部が固定されている。駆動板５０ａには、その長手方向両端部に筒状の軸固定部５０ｂが固定されている。昇降軸４２は、その下端が軸固定部５０ｂに挿入されて駆動板５０ａに固定されている。駆動板５０ａと軸固定部５０ｂとで駆動部材５０が構成されている。 A center portion of a long drive plate 50a is fixed to the tip of the rod 46a of the air cylinder 46. Cylindrical shaft fixing portions 50b are fixed to both ends in the longitudinal direction of the drive plate 50a. The lifting shaft 42 is fixed to the driving plate 50a by inserting its lower end into the shaft fixing portion 50b. A driving member 50 is composed of the driving plate 50a and the shaft fixing portion 50b.
　エアシリンダ４６は、電磁弁等を介して制御装置５によって制御される。そして、エアシリンダ４６のロッド４６ａが収縮及び伸長動作することによって、駆動部材５０及び２本の昇降軸４２が昇降し、昇降軸４２の昇降にともなって昇降板４１及び昇降規制板４４が昇降する。 The air cylinder 46 is controlled by the controller 5 via an electromagnetic valve or the like. As the rod 46a of the air cylinder 46 contracts and expands, the driving member 50 and the two lifting shafts 42 are raised and lowered. .
　また、エアシリンダ４６には、ロッド４６ａが収縮した時のピストン４６ｂを検出するピストン位置センサ（全閉検出部）４９が取り付けられている。ピストン位置センサ４９は、ピストン４６ｂに組み込まれた磁石の磁場を検出する周知のセンサである。ピストン位置センサ４９の検出信号は制御装置５に入力される。 Also, the air cylinder 46 is attached with a piston position sensor (fully closed detector) 49 that detects the piston 46b when the rod 46a is contracted. Piston position sensor 49 is a known sensor that detects the magnetic field of a magnet incorporated in piston 46b. A detection signal from the piston position sensor 49 is input to the control device 5 .
　本例において、一対のゲート板２１，２２からなるゲート板対２０を開閉させるゲート開閉駆動部９（図３等）は、エアシリンダ４６を有するゲート駆動部７と、ゲート板２１，２２に固定された回動軸２３，２４と、回動軸２３，２４に取り付けられた駆動レバー３２とで構成される。また、開閉機構部は、ゲート開閉駆動部９からアクチュエータであるエアシリンダ４６を除いた部分であり、エアシリンダ４６の動作に連動して一対のゲート板２１，２２を開閉させるための構造を有している。 In this example, a gate opening/closing drive unit 9 (see FIG. 3, etc.) for opening and closing a gate plate pair 20 consisting of a pair of gate plates 21 and 22 is fixed to the gate drive unit 7 having an air cylinder 46 and to the gate plates 21 and 22. and a driving lever 32 attached to the rotating shafts 23 and 24 . The opening/closing mechanism is a portion of the gate opening/closing drive unit 9 excluding the air cylinder 46, which is an actuator, and has a structure for opening and closing the pair of gate plates 21 and 22 in conjunction with the operation of the air cylinder 46. are doing.
　上記のように構成される供給ゲート装置８の動作を、さらに図７Ａ～図７Ｃを参照して説明する。図７Ａは、一対のゲート板２１，２２が全開状態のときの供給ゲート装置８の状態を示す正面図であり、図７Ｂは、一対のゲート板２１，２２が全閉状態のときの供給ゲート装置８の状態を示す正面図である。また、図７Ｃは、一対のゲート板２１，２２が閉じるときにゲート板２１，２２の間に作業者の手指Ｍが挟まれたときの供給ゲート装置８の状態を示す正面図である。図７Ａ～図７Ｃにおいて、図面を見やすくするため、供給ゲート６は二点鎖線で示されている。 The operation of the supply gate device 8 configured as described above will be further described with reference to FIGS. 7A to 7C. 7A is a front view showing the state of the supply gate device 8 when the pair of gate plates 21 and 22 are fully open, and FIG. 7B is a front view showing the state of the supply gate when the pair of gate plates 21 and 22 are fully closed. 4 is a front view showing the state of the device 8; FIG. FIG. 7C is a front view showing the state of the supply gate device 8 when the operator's finger M is caught between the pair of gate plates 21 and 22 when the gate plates 21 and 22 are closed. In FIGS. 7A to 7C, the supply gate 6 is indicated by a two-dot chain line for clarity of illustration.
　図７Ａに示すように、ゲート板２１，２２が全開状態のときには、エアシリンダ４６のロッド４６ａは所定の伸長状態であり、このとき昇降板４１は所定の下降位置にある。この状態から、エアシリンダ４６のロッド４６ａが収縮動作して所定の収縮状態になると、図７Ｂに示すように、昇降板４１が所定の上昇位置まで上昇する。このとき、２つの駆動レバー３２が互いに逆方向に回動し、これにともなって２つの回動軸２３，２４が互いに逆方向に回動し、ゲート板２１，２２は全閉状態となる。また、エアシリンダ４６のロッド４６ａが伸長動作して所定の伸長状態になると、昇降板４１が所定の下降位置まで下降し、ゲート板２１，２２が全開状態（図７Ａの状態）となる。 As shown in FIG. 7A, when the gate plates 21 and 22 are fully open, the rod 46a of the air cylinder 46 is in a predetermined extended state, and at this time the lift plate 41 is in a predetermined lowered position. From this state, when the rod 46a of the air cylinder 46 is retracted to a predetermined retracted state, the lift plate 41 is lifted to a predetermined elevated position as shown in FIG. 7B. At this time, the two driving levers 32 rotate in opposite directions, and accordingly the two rotating shafts 23 and 24 rotate in opposite directions, and the gate plates 21 and 22 are fully closed. Further, when the rod 46a of the air cylinder 46 is extended to a predetermined extended state, the lift plate 41 is lowered to a predetermined lowered position, and the gate plates 21 and 22 are fully opened (the state shown in FIG. 7A).
　このように、エアシリンダ４６の伸縮動作による昇降板４１の昇降によって２つの駆動レバー３２が回動軸２３，２４を中心にして互いに逆方向に回動し、一対のゲート板２１，２２が開閉動作する。よって、一対のゲート板２１，２２は、開閉動作するときには、それぞれ回動軸２３，２４を中心にして互いに逆方向に回動する。ゲート板２１，２２は、全閉状態のときに水平状態となり、開くときには水平状態から下方に向けて回動する。図７Ａのようにゲート板２１，２２が全開状態のときには、ピストン位置センサ４９はピストン４６ｂを検出しないが、図７Ｂのようにゲート板２１，２２が全閉状態のときには、ピストン位置センサ４９はピストン４６ｂを検出する。 As described above, the elevating plate 41 is moved up and down by the expansion and contraction of the air cylinder 46, and the two drive levers 32 rotate about the rotation shafts 23 and 24 in opposite directions to open and close the pair of gate plates 21 and 22. Operate. Therefore, the pair of gate plates 21 and 22 rotate in opposite directions about the rotation shafts 23 and 24, respectively, when opening and closing. The gate plates 21 and 22 are in a horizontal state when fully closed, and rotate downward from the horizontal state when opened. When the gate plates 21 and 22 are fully open as shown in FIG. 7A, the piston position sensor 49 does not detect the piston 46b, but when the gate plates 21 and 22 are fully closed as shown in FIG. Detect the piston 46b.
　また、図７Ｃのように、一対のゲート板２１，２２が閉じるときにゲート板２１，２２の間に作業者の手指Ｍが挟まれた場合には、ゲート板２１，２２は完全に閉じることができず、エアシリンダ４６のピストン４６ｂは所定の動作終端位置に到達できない。この場合、ピストン位置センサ４９はピストン４６ｂを検出しない。 Also, as shown in FIG. 7C, when the operator's fingers M are caught between the pair of gate plates 21 and 22 when the pair of gate plates 21 and 22 are closed, the gate plates 21 and 22 are completely closed. , and the piston 46b of the air cylinder 46 cannot reach the predetermined operation end position. In this case, the piston position sensor 49 does not detect the piston 46b.
　ピストン位置センサ４９は、ゲート板２１，２２が全閉状態であることを検出するために設置されており、図７Ｂのようにゲート板２１，２２が全閉状態のときにピストン位置センサ４９はピストン４６ｂを検出し、検出信号を制御装置５へ出力する。一方、図７Ａ，図７Ｃの状態のときには、ピストン位置センサ４９は検出信号を出力しない。 The piston position sensor 49 is installed to detect that the gate plates 21 and 22 are fully closed, and when the gate plates 21 and 22 are fully closed as shown in FIG. It detects the piston 46 b and outputs a detection signal to the control device 5 . On the other hand, in the states of FIGS. 7A and 7C, the piston position sensor 49 does not output a detection signal.
　なお、本例では、駆動部材５０の上方側にエアシリンダ４６を下向きにして配置しているが、駆動部材５０の下方側にエアシリンダ４６を上向きにして配置するようにしてもよい。この場合、ロッド４６ａが所定の収縮状態のときに昇降板４１が所定の下降位置となり、ロッド４６ａが所定の伸長状態のときに昇降板４１が所定の上昇位置となるようにすればよい。 In this example, the air cylinder 46 is arranged facing downward above the driving member 50, but the air cylinder 46 may be arranged below the driving member 50 facing upward. In this case, the lift plate 41 is set to a predetermined lowered position when the rod 46a is in a predetermined contracted state, and is set to a predetermined raised position when the rod 46a is in a predetermined extended state.
　以上のように構成される組合せ秤の動作等の一例について説明する。この組合せ秤の動作は制御装置５の制御によって実現される。すなわち、組合せ秤の動作に必要な情報は全て制御装置５に内蔵されている記憶部に予め記憶されており、動作中に記憶される情報等も全て制御装置５の記憶部に記憶される。 An example of the operation of the combination weigher configured as above will be explained. The operation of this combination weigher is realized by the control of the control device 5 . That is, all the information necessary for the operation of the combination weigher is pre-stored in the storage section built in the control device 5, and all the information stored during the operation is also stored in the storage section of the control device 5.
　作業者は、例えば、作業台１２の上に大量の被計量物を予め載せておき、適宜、供給口１３へ被計量物を供給する作業を行う。被計量物は、例えば、小エビ等の水産物、あるいは農産物などである。 For example, the operator places a large amount of objects to be weighed on the workbench 12 in advance, and appropriately supplies the objects to be weighed to the supply port 13 . The object to be weighed is, for example, a marine product such as shrimp, or an agricultural product.
　また、制御装置５は、各重量センサ２の計量値に基づいて、被計量物が供給されている計量コンベア１を認識するとともにその被計量物の重量値を認識する。ここで、被計量物が供給されている計量コンベア１を認識する際、重量センサ２の計量値と予め設定されている基準値Ｗｔとを比較し、計量値が基準値Ｗｔ以上であれば被計量物が供給されていると判断し、基準値Ｗｔ未満であれば被計量物は供給されていないと判断する。そして、対応して設けられている計量コンベア１、重量センサ２及び供給ゲート６において、制御装置５は、計量コンベア１の搬送動作停止時に、重量センサ２の計量値が基準値Ｗｔ未満であれば供給ゲート６のゲート板２１，２２を開き、基準値Ｗｔ以上であればゲート板２１，２２を閉じるように、エアシリンダ４６を制御する。基準値Ｗｔは、予め制御装置５に記憶されている。 Also, the control device 5 recognizes the weighing conveyor 1 to which the object to be weighed is supplied and the weight value of the object to be weighed based on the weight value of each weight sensor 2 . Here, when recognizing the weighing conveyor 1 to which the object to be weighed is being fed, the weighing value of the weight sensor 2 is compared with a preset reference value Wt. It is determined that the object to be weighed is supplied, and if the value is less than the reference value Wt, it is determined that the object to be weighed is not supplied. Then, in the weighing conveyor 1, the weight sensor 2, and the supply gate 6, which are provided correspondingly, the control device 5 controls when the weighing value of the weight sensor 2 is less than the reference value Wt when the conveying operation of the weighing conveyor 1 is stopped. The air cylinder 46 is controlled to open the gate plates 21 and 22 of the supply gate 6 and to close the gate plates 21 and 22 if the reference value Wt or more. The reference value Wt is stored in the control device 5 in advance.
　組合せ秤の運転が開始されると、制御装置５は、排出コンベア３を駆動させる。この運転開始時には、例えば、全てのゲート板２１，２２が開かれた状態であり、全ての計量コンベア１は搬送停止状態であり、被計量物が載っていない。 When the operation of the combination weigher is started, the control device 5 drives the discharge conveyor 3. At the start of the operation, for example, all the gate plates 21 and 22 are open, all the weighing conveyors 1 are in a stopped state, and there are no objects to be weighed.
　そして、作業者が各供給口１３へ被計量物を供給すると、供給口１３から搬送停止状態の計量コンベア１上へ被計量物が供給される。ここで、制御装置５は、被計量物が供給された計量コンベア１に対応するゲート板２１，２２を閉じる。この後、作業者から供給口１３へ供給された被計量物はゲート板２１，２２上に載った状態となる。 Then, when the operator supplies the objects to be weighed to each of the supply ports 13, the objects to be weighed are supplied from the supply ports 13 onto the weighing conveyor 1 in the transport stop state. Here, the control device 5 closes the gate plates 21 and 22 corresponding to the weighing conveyor 1 to which the objects to be weighed have been supplied. Thereafter, the objects to be weighed supplied from the operator to the supply port 13 are placed on the gate plates 21 and 22 .
　そして、制御装置５は、例えば、全てあるいは所定個数以上の計量コンベア１へ被計量物が供給されると、被計量物の重量値に基づいて前述の組合せ処理を行って排出組合せを求める。そして、排出組合せに選択されている計量コンベア１を所定時間駆動して、同計量コンベア１上の被計量物を排出コンベア３へ搬送する。計量コンベア１を所定時間駆動して停止後に、同計量コンベア１に対応する重量センサ２の計量値が基準値Ｗｔ未満であれば、対応するゲート板２１，２２を開く。このとき、同ゲート板２１，２２上に被計量物が供給されていれば、その被計量物が搬送停止状態の計量コンベア１へ供給され、重量センサ２の計量値が基準値Ｗｔ以上になると同ゲート板２１，２２を閉じる。また、同ゲート板２１，２２上に被計量物が供給されていなければ、作業者によって供給口１３から搬送停止状態の計量コンベア１上へ被計量物が供給されて、重量センサ２の計量値が基準値Ｗｔ以上になると同ゲート板２１，２２を閉じる。 Then, for example, when all or more than a predetermined number of objects to be weighed are supplied to the weighing conveyor 1, the control device 5 performs the above-described combination processing based on the weight values of the objects to determine the discharge combination. Then, the weighing conveyor 1 selected for the discharge combination is driven for a predetermined time, and the objects to be weighed on the weighing conveyor 1 are conveyed to the discharge conveyor 3 . After the weighing conveyor 1 has been driven for a predetermined time and stopped, if the weighing value of the weight sensor 2 corresponding to the weighing conveyor 1 is less than the reference value Wt, the corresponding gate plates 21 and 22 are opened. At this time, if an object to be weighed is supplied onto the gate plates 21 and 22, the object to be weighed is supplied to the weighing conveyor 1 in the stopped state, and the weight value of the weight sensor 2 becomes equal to or greater than the reference value Wt. The gate plates 21 and 22 are closed. If the object to be weighed is not supplied onto the gate plates 21 and 22, the operator feeds the object to be weighed from the supply port 13 onto the weighing conveyor 1 that is in the stopped state, and the weight value of the weight sensor 2 is changed. becomes equal to or greater than the reference value Wt, the gate plates 21 and 22 are closed.
　そして、以上の動作が繰り返し行われる。なお、排出コンベア３は計量コンベア１から搬出された被計量物を搬送して外部へ排出する。この排出された被計量物は、例えば、包装機等の後段装置へ供給されるようにしてもよいし、別の作業者が容器等で受けとるようにしてもよい。 And the above actions are repeated. The discharge conveyor 3 conveys the objects to be weighed carried out from the weighing conveyor 1 and discharges them to the outside. For example, the discharged objects to be weighed may be supplied to a post-stage device such as a packaging machine, or may be received by another worker in a container or the like.
　この組合せ秤では、計量コンベア１に被計量物が供給されていなければ供給ゲート６のゲート板２１，２２は全開状態となり、このときに作業者によって供給口１３へ供給される被計量物は搬送停止状態の計量コンベア１へ供給されて保持される。また、計量コンベア１に被計量物が供給されていればゲート板２１，２２は全閉状態となり、このときに作業者によって供給口１３へ供給される被計量物はゲート板２１，２２上で保持される。このように、閉じた状態のゲート板２１，２２の上に被計量物を供給しておくことにより、被計量物を排出した計量コンベア１へ次の被計量物を即座に供給することができ、生産性の向上を図ることができる。 In this combination weigher, the gate plates 21 and 22 of the supply gate 6 are fully opened when no object to be weighed is supplied to the weighing conveyor 1. At this time, the object to be weighed supplied to the supply port 13 by the operator is conveyed. It is supplied to and held by the weighing conveyor 1 in the stopped state. Also, if the objects to be weighed are supplied to the weighing conveyor 1, the gate plates 21 and 22 are fully closed. retained. By supplying the objects to be weighed above the closed gate plates 21 and 22 in this manner, the next object to be weighed can be immediately supplied to the weighing conveyor 1 that has discharged the objects to be weighed. , productivity can be improved.
　図８は、任意の１つの計量部Ｃｗに対して被計量物が供給されてからその重量の算出が行われるまでの処理の概略を示すフローチャートである。この処理は制御装置５によって実行される。 FIG. 8 is a flow chart showing an outline of the processing from the supply of the object to be weighed to any one weighing unit Cw to the calculation of its weight. This processing is executed by the control device 5 .
　例えば、計量コンベア１上に被計量物が供給されておらず、かつ、その上方のゲート板２１，２２が全開状態のときに、作業者によって供給口１３を介して被計量物が計量コンベア１上に供給されると、ステップＳ１において、重量センサ２の計量値が基準値Ｗｔ以上となり、ステップＳ１からステップＳ２へ進み、制御装置５は、ゲート板２１，２２を全閉するようにエアシリンダ４６を制御する。 For example, when the objects to be weighed are not supplied onto the weighing conveyor 1 and the gate plates 21 and 22 above the gate plates 21 and 22 are in a fully open state, the object to be weighed is placed on the weighing conveyor 1 through the supply port 13 by an operator. In step S1, the weighing value of the weight sensor 2 becomes equal to or greater than the reference value Wt, and the process proceeds from step S1 to step S2. 46.
　また、制御装置５は、ステップＳ２のエアシリンダ４６の制御を開始した直後に、ゲート板２１，２２が全閉状態となるまでの時間の計測を開始し、所定時間（ｔ１）内にゲート板２１，２２が全閉したことを検出した場合（ステップＳ３でＹｅｓの場合）には、重量センサ２の計量値が安定するのを待って、安定した計量値を計量コンベア１上の被計量物の重量値として算出する（ステップＳ４）。なお、ステップＳ３において、制御装置５は、ピストン位置センサ４９から検出信号が入力されると、ゲート板２１，２２が全閉したことを検出する。 Immediately after starting the control of the air cylinder 46 in step S2, the control device 5 starts measuring the time until the gate plates 21 and 22 are fully closed, and the gate plates are closed within a predetermined time (t1). 21 and 22 are fully closed (Yes in step S3), wait for the weight value of the weight sensor 2 to stabilize, and then transfer the stable weight value to the object to be weighed on the weighing conveyor 1. is calculated as the weight value of (step S4). In step S3, when the detection signal is input from the piston position sensor 49, the control device 5 detects that the gate plates 21 and 22 are fully closed.
　一方、制御装置５は、第１の所定時間ｔ１内にゲート板２１，２２が全閉したことを検出しなかった場合（ステップＳ３でＮｏの場合）には、ゲート板２１，２２を全開するようにエアシリンダ４６を制御する（ステップＳ５）。 On the other hand, when the controller 5 does not detect that the gate plates 21 and 22 are fully closed within the first predetermined time t1 (No in step S3), the controller 5 fully opens the gate plates 21 and 22. The air cylinder 46 is controlled as follows (step S5).
　そして、制御装置５は、ステップＳ５のエアシリンダ４６の制御を開始した直後からの経過時間を計測し、この計測時間が第２の所定時間ｔ２になると、ステップＳ２に戻り、ゲート板２１，２２を再度全閉するようにエアシリンダ４６を制御する。 Then, the control device 5 measures the elapsed time immediately after starting the control of the air cylinder 46 in step S5. is controlled to fully close the air cylinder 46 again.
　上記の第１の所定時間ｔ１は、ゲート板２１，２２が全開状態から全閉状態になるまでの正常な動作時間（例えば０．２秒）より少し長い時間（例えば０．３～０．４秒）に予め設定されて制御装置５に記憶されている。また、上記の第２の所定時間ｔ２は、例えば１～５秒程度に予め設定されて制御装置５に記憶されている。 The above-mentioned first predetermined time t1 is a time slightly longer (eg, 0.3 to 0.4 seconds) than the normal operating time (eg, 0.2 seconds) for the gate plates 21 and 22 to change from the fully open state to the fully closed state. seconds) and stored in the controller 5 in advance. Further, the second predetermined time t2 is set in advance to, for example, about 1 to 5 seconds and stored in the control device 5. As shown in FIG.
　この組合秤では、上記のように、ステップＳ２でゲート板２１，２２を全閉制御したときに、作業者の注意不足によって手指をゲート板２１，２２に挟まれた場合（図７Ｃ参照）には、第１の所定時間ｔ１内にゲート板２１，２２の全閉を検出できないので、ステップＳ５で即座にゲート板２１，２２を開くことができる。よって、作業者の手指がゲート板２１，２２に挟まれた場合に作業者の手指を容易に解放することができる。これにより、作業者は手指がゲート板２１，２２に挟まれた状態から手指を引き抜くという動作を行うこともない。また、被計量物がゲート板２１，２２に挟まれた場合でも被計量物をゲート板２１，２２から容易に解放することができる。 In this combination weigher, as described above, when the gate plates 21 and 22 are controlled to be fully closed in step S2, if the fingers are caught between the gate plates 21 and 22 due to lack of attention of the operator (see FIG. 7C), Since the fully closed state of the gate plates 21 and 22 cannot be detected within the first predetermined time t1, the gate plates 21 and 22 can be opened immediately in step S5. Therefore, when the operator's fingers are caught between the gate plates 21 and 22, the operator's fingers can be easily released. As a result, the operator does not have to pull out the finger from the state in which the finger is sandwiched between the gate plates 21 and 22.例文帳に追加Also, even if the object to be weighed is caught between the gate plates 21 and 22, the object to be weighed can be easily released from the gate plates 21 and 22. FIG.
　また、制御装置５は、ステップＳ５でゲート板２１，２２を開いた後、第２の所定時間ｔ２が経過すると、ゲート板２１，２２を再度全閉するように制御する。よって、作業者は、ゲート板２１，２２を閉じるための復帰操作を行うことなく、被計量物を供給する作業を継続して行うことができる。 In addition, after the gate plates 21 and 22 are opened in step S5, the control device 5 controls the gate plates 21 and 22 to fully close again when the second predetermined time t2 elapses. Therefore, the operator can continue the operation of supplying the objects to be weighed without performing the return operation for closing the gate plates 21 and 22 .
　なお、上記では、ゲート板２１，２２の全閉状態を検出する全閉検出部として、ピストン位置センサ４９を備えたが、これに限らない。上記全閉検出部は、ゲート板２１，２２の動作と常に連動して動作する部分のゲート板２１，２２が全閉状態となるときの動作位置を検出するセンサであればよい。例えば、図４Ａに二点鎖線で示すように、回動軸２３，２４のいずれか一方（図示の例では回動軸２３）の回転位置を検出するロータリエンコーダ６４を上記全閉検出部として備えるようにしてもよい。この場合、ロータリエンコーダ６４は、ゲート板２１，２２が全閉状態となるときの回動軸２３の回転位置を検出すると、検出信号を制御装置５へ出力する。あるいは、ゲート板２１，２２が全閉状態となるときの昇降板４１、昇降規制板４４または駆動板５０ａ等の位置を検出するセンサ（光電センサ、近接センサ等）を上記全閉検出部として備えるようにしてもよい。このように全閉検出部は、ゲート板２１，２２が全閉状態のときの、アクチュエータの動作位置（本例ではエアシリンダ４６のピストン４６ｂの位置）を検出するものであってもよいし、ゲート開閉駆動部９からエアシリンダ４６を除いた部分である開閉機構部の所定部位の位置を検出するものであってもよい。 In the above description, the piston position sensor 49 is provided as a fully closed detection section that detects the fully closed state of the gate plates 21 and 22, but the present invention is not limited to this. The full-closed detector may be a sensor that detects the operating position when the gate plates 21 and 22, which operate in conjunction with the operation of the gate plates 21 and 22, are in the fully closed state. For example, as indicated by a two-dot chain line in FIG. 4A, a rotary encoder 64 for detecting the rotational position of one of the rotating shafts 23 and 24 (the rotating shaft 23 in the illustrated example) is provided as the fully closed detector. You may do so. In this case, when the rotary encoder 64 detects the rotational position of the rotating shaft 23 when the gate plates 21 and 22 are fully closed, it outputs a detection signal to the control device 5 . Alternatively, a sensor (photoelectric sensor, proximity sensor, etc.) for detecting the position of the lift plate 41, the lift control plate 44, or the drive plate 50a when the gate plates 21 and 22 are fully closed is provided as the fully closed detector. You may do so. In this manner, the fully closed detector may detect the operating position of the actuator (the position of the piston 46b of the air cylinder 46 in this example) when the gate plates 21 and 22 are fully closed. The position of a predetermined portion of the opening/closing mechanism, which is a portion of the gate opening/closing driving portion 9 excluding the air cylinder 46, may be detected.
　また、アクチュエータとしてエアシリンダ４６を用いたが、モータを用いてもよい。この場合、全閉検出部として、ゲート板２１，２２が全閉状態のときのモータの回転位置を検出するセンサを用いてもよい。また、全閉検出部は、ゲート板２１，２２が全閉状態のときの開閉機構部の所定部位の位置を検出するものであってもよい。 Also, although the air cylinder 46 is used as the actuator, a motor may be used. In this case, a sensor that detects the rotational position of the motor when the gate plates 21 and 22 are in the fully closed state may be used as the fully closed detector. Further, the fully closed detector may detect the position of a predetermined portion of the opening/closing mechanism when the gate plates 21 and 22 are fully closed.
　次に、ゲート駆動部の変形例について説明する。図９Ａは、変形例のゲート駆動部７Ａを備えた場合の一対のゲート板２１，２２が全開状態のときの供給ゲート装置８の状態を示す正面図であり、図９Ｂは、変形例のゲート駆動部７Ａを備えた場合の一対のゲート板２１，２２が全閉状態のときの供給ゲート装置８の状態を示す正面図である。また、図９Ｃは、変形例のゲート駆動部７Ａを備えた場合の一対のゲート板２１，２２が閉じるときにゲート板２１，２２の間に作業者の手指Ｍが挟まれたときの供給ゲート装置８の状態を示す正面図である。図９Ａ～図９Ｃにおいて、図面を見やすくするため、供給ゲート６は二点鎖線で示されている。 Next, a modified example of the gate driver will be described. FIG. 9A is a front view showing the state of the supply gate device 8 when the pair of gate plates 21 and 22 are in the fully open state when the gate drive section 7A of the modification is provided, and FIG. FIG. 11 is a front view showing a state of the supply gate device 8 when a pair of gate plates 21 and 22 are in a fully closed state when provided with a driving portion 7A; FIG. 9C shows the supply gate when the operator's finger M is sandwiched between the pair of gate plates 21 and 22 when the pair of gate plates 21 and 22 are closed in the case where the gate driving unit 7A of the modified example is provided. 4 is a front view showing the state of the device 8; FIG. In FIGS. 9A to 9C, the supply gate 6 is indicated by a two-dot chain line for clarity of illustration.
　この変形例のゲート駆動部７Ａでは、概略、駆動部材５０Ａが駆動板５０ａと軸受部５０ｃとで構成されていることと、昇降軸４２に圧縮コイルばね５２が装着されていることが、前述のゲート駆動部７とは異なる。以下に詳しく説明する。 In the gate driving portion 7A of this modified example, the driving member 50A is generally composed of the driving plate 50a and the bearing portion 50c, and the compression coil spring 52 is attached to the lifting shaft 42, as described above. It differs from the gate driver 7 . A detailed description is given below.
　エアシリンダ４６のロッド４６ａの先端には、長板状の駆動板５０ａの中央部が固定されている。駆動板５０ａには、その長手方向両端部に、昇降軸４２を昇降自在に支持する軸受部５０ｃが固定されるとともに、昇降軸４２を挿通する貫通孔（図示せず）が設けられている。駆動板５０ａと軸受部５０ｃとで駆動部材５０Ａが構成されている。そして、昇降軸４２の下端には、昇降軸４２から駆動部材５０Ａが抜け落ちないように、ワッシャ等の抜け止め部材５１が固定されている。よって、２つの昇降軸４２は、駆動部材５０Ａを貫通し、駆動部材５０Ａと上下動自在に連結されている。 A center portion of a long drive plate 50a is fixed to the tip of the rod 46a of the air cylinder 46. The driving plate 50a is provided with bearings 50c that support the lifting shaft 42 so that it can move up and down, and through holes (not shown) through which the lifting shaft 42 is inserted. A driving member 50A is composed of the driving plate 50a and the bearing portion 50c. A retaining member 51 such as a washer is fixed to the lower end of the lifting shaft 42 so that the drive member 50A does not fall off from the lifting shaft 42 . Therefore, the two elevating shafts 42 pass through the driving member 50A and are connected to the driving member 50A so as to be vertically movable.
　また、昇降軸４２の中ほどの所定位置に止め輪５３が固定され、止め輪５３と軸受部５０ｃとの間に、内部に昇降軸４２が挿入された状態で圧縮コイルばね５２が支持されている。この圧縮コイルばね５２によって、昇降軸４２が駆動部材５０Ａに対して上方向に付勢されている。 A retaining ring 53 is fixed at a predetermined position in the middle of the elevating shaft 42, and the compression coil spring 52 is supported between the retaining ring 53 and the bearing portion 50c with the elevating shaft 42 inserted therein. there is The compression coil spring 52 urges the elevating shaft 42 upward with respect to the driving member 50A.
　このゲート駆動部７Ａにおいても前述のゲート駆動部７と同様、エアシリンダ４６のロッド４６ａが収縮及び伸長動作することによって、駆動部材５０が昇降し、それによって、２本の昇降軸４２が昇降し、昇降板４１及び昇降規制板４４が上下に昇降動作する。 In this gate driving section 7A, similarly to the gate driving section 7 described above, the rod 46a of the air cylinder 46 is contracted and extended to raise and lower the drive member 50, thereby raising and lowering the two elevating shafts 42. , the elevating plate 41 and the elevating restricting plate 44 move up and down.
　一方、図９Ｃに示すように、ゲート板２１，２２を閉じるときに作業者の手指Ｍが挟まれた場合には、圧縮コイルばね５２が収縮して、ゲート板２１，２２が半開きの状態となる。これにより、作業者の手指Ｍがゲート板２１，２２に挟まれたときに瞬間的に作業者の手指Ｍにかかる圧力を低減できる。 On the other hand, as shown in FIG. 9C, when the operator's fingers M are caught when the gate plates 21 and 22 are closed, the compression coil spring 52 contracts and the gate plates 21 and 22 are in a half-open state. Become. As a result, when the operator's finger M is sandwiched between the gate plates 21 and 22, the pressure momentarily applied to the operator's finger M can be reduced.
　このゲート駆動部７Ａの場合、エアシリンダ４６の動作が常にゲート板２１，２２の動作と連動するとは限らないので、ゲート板２１，２２の全閉を検出する全閉検出部として前述のピストン位置センサ４９を用いることはできない。よって、前述のロータリエンコーダ６４、あるいは、ゲート板２１，２２が全閉状態となるときの昇降板４１、昇降規制板４４または駆動板５０ａ等の位置を検出するセンサ（光電センサ、近接センサ等）を上記全閉検出部として備えるようにすればよい。 In the case of this gate drive unit 7A, the operation of the air cylinder 46 is not always interlocked with the operation of the gate plates 21 and 22. Therefore, the full-close detection unit for detecting the full-close of the gate plates 21 and 22 is the above-described piston position. Sensor 49 cannot be used. Therefore, the above-mentioned rotary encoder 64 or a sensor (photoelectric sensor, proximity sensor, etc.) for detecting the position of the lifting plate 41, the lifting restriction plate 44, or the drive plate 50a when the gate plates 21 and 22 are in the fully closed state. is provided as the full-closed detector.
　なお、本実施形態では、各々の供給ゲート装置８のゲート板２１，２２の下方に配置される計量部Ｃｗを、計量コンベア１及び重量センサ２で構成したが、これに限られない。例えば、計量部が、ホッパと、同ホッパ内の被計量物の重量を計量するための重量センサとで構成された組合せ秤であってもよい。 In this embodiment, the weighing section Cw arranged below the gate plates 21 and 22 of each supply gate device 8 is composed of the weighing conveyor 1 and the weight sensor 2, but is not limited to this. For example, the weighing unit may be a combination weigher composed of a hopper and a weight sensor for measuring the weight of the objects to be weighed in the hopper.
　上記説明から、当業者にとっては、本発明の多くの改良や他の実施形態が明らかである。従って、上記説明は、例示としてのみ解釈されるべきであり、本発明を実行する最良の態様を当業者に教示する目的で提供されたものである。本発明の精神を逸脱することなく、その構造及び／又は機能の詳細を実質的に変更できる。 From the above description, many modifications and other embodiments of the invention will be apparent to those skilled in the art. Accordingly, the above description is to be construed as illustrative only and is provided for the purpose of teaching those skilled in the art the best mode of carrying out the invention. Substantial details of construction and/or function may be changed without departing from the spirit of the invention.
　本発明は、作業者の手指がゲート板対に挟まれた場合に作業者の手指をゲート板対から容易に解放することができる組合せ秤等として有用である。 The present invention is useful as a combination weigher or the like that can easily release the operator's fingers from the pair of gate plates when the operator's fingers are caught between the pair of gate plates.
Ｃｗ　計量部
１　計量コンベア
２　重量センサ
３　排出コンベア
５　制御装置
６　供給ゲート
７，７Ａ　ゲート駆動部
８　供給ゲート装置
９　ゲート開閉駆動部
１２　作業台
１３　供給口
２０　ゲート板対
２１，２２　ゲート板
２３，２４　回動軸
３２　駆動レバー
４１　昇降板
４２　昇降軸
４３　連結軸
４４　昇降規制板
４６　エアシリンダ
５０，５０Ａ　駆動部材
６４　ロータリエンコーダ Cw Weighing unit 1 Weighing conveyor 2 Weight sensor 3 Discharge conveyor 5 Control device 6 Supply gates 7, 7A Gate drive unit 8 Supply gate device 9 Gate opening/closing drive unit 12 Workbench 13 Supply port 20 Gate plate pair 21, 22 Gate plate 23, 24 Rotating shaft 32 Drive lever 41 Elevating plate 42 Elevating shaft 43 Connecting shaft 44 Elevating restricting plate 46 Air cylinders 50, 50A Driving member 64 Rotary encoder

Claims (5)

  1. 　作業者によって被計量物が供給される複数の供給口が開口された作業台と、
    　各々、前記供給口と対応してその下方に設けられ、閉状態のときに供給される被計量物を保持し、下方に向かって開くことにより保持している被計量物が排出される複数のゲート板対と、
    　各々、前記ゲート板対を開閉させる複数のゲート開閉駆動部と、
    　各々、前記ゲート板対と対応してその下方に設けられ、上方から供給される被計量物を一時保持してその重量を計量し、保持した被計量物を排出する複数の計量部と、
    　前記計量部で計量された重量に基づいて合計重量が目標重量範囲内となる被計量物の組合せを求める組合せ処理部と、
    　前記計量部で計量された重量に基づいて前記計量部に被計量物が供給されているか否かを判断し、供給されているときには対応する前記ゲート板対を閉じ、供給されていないときには対応する前記ゲート板対を開くように前記ゲート開閉駆動部を制御するゲート制御部と、
    　前記ゲート板対の全閉状態を検出する全閉検出部と、
    を備え、
    　前記ゲート制御部は、
    　前記ゲート板対を閉じるように前記ゲート開閉駆動部を制御したときに、この制御開始から第１の所定時間内に前記全閉検出部がゲート板対の全閉状態を検出しない場合には、前記ゲート板対を開くように前記ゲート開閉駆動部を制御するよう構成された、
    　組合せ秤。     a workbench having a plurality of supply openings through which objects to be weighed are supplied by an operator;
    Each of the plurality of openings is provided below the supply port corresponding to the supply port, holds the object to be weighed when it is closed, and discharges the object to be weighed by opening downward. a pair of gate plates;
    a plurality of gate opening/closing driving units for respectively opening and closing the gate plate pairs;
    a plurality of weighing units respectively provided below the pair of gate plates corresponding to the pair of gate plates for temporarily holding an object to be weighed supplied from above, weighing the weight of the object, and discharging the held object to be weighed;
    a combination processing unit that obtains a combination of objects whose total weight is within a target weight range based on the weights weighed by the weighing unit;
    Based on the weight weighed by the weighing unit, it is determined whether or not the weighing unit is supplied with the object to be weighed, and when the object is supplied, the corresponding gate plate pair is closed, and when the object is not supplied, the countermeasure is taken. a gate control unit for controlling the gate opening/closing driving unit to open the gate plate pair;
    a fully closed detector that detects the fully closed state of the gate plate pair;
    with
    The gate control unit
    When the gate opening/closing driving unit is controlled to close the gate plate pair, if the fully closed detection unit does not detect the fully closed state of the gate plate pair within a first predetermined time from the start of control, configured to control the gate opening/closing drive to open the gate plate pair;
    combination weigher.
  2. 　前記ゲート制御部は、
    　前記第１の所定時間内に前記全閉検出部がゲート板対の全閉状態を検出しない場合に前記ゲート板対を開くように前記ゲート開閉駆動部を制御した後、第２の所定時間経過後に前記ゲート板対を閉じるように前記ゲート開閉駆動部を制御するよう構成された、
    　請求項１に記載の組合せ秤。     The gate control unit
    A second predetermined time elapses after the gate opening/closing driving unit is controlled to open the gate plate pair when the fully closed state detection unit does not detect the fully closed state of the gate plate pair within the first predetermined time. configured to control the gate opening/closing drive to later close the gate plate pair;
    The combination weigher according to claim 1.
  3. 　前記ゲート開閉駆動部は、
    　前記ゲート制御部によって動作が制御されるアクチュエータと、前記アクチュエータの動作に連動して前記ゲート板対を開閉させる開閉機構部と、を有し、
    　前記全閉検出部は、
    　前記アクチュエータの動作位置に基づいて前記ゲート板対の全閉状態を検出するよう構成された、
    　請求項１または２に記載の組合せ秤。     The gate opening/closing drive unit
    an actuator whose operation is controlled by the gate control unit; and an opening/closing mechanism unit that opens and closes the gate plate pair in conjunction with the operation of the actuator,
    The fully-closed detector is
    configured to detect the fully closed state of the gate plate pair based on the operating position of the actuator;
    The combination weigher according to claim 1 or 2.
  4. 　前記ゲート開閉駆動部は、
    　前記ゲート制御部によって動作が制御されるアクチュエータと、前記アクチュエータの動作に連動して前記ゲート板対を開閉させる開閉機構部と、を有し、
    　前記全閉検出部は、
    　前記開閉機構部の所定部位の位置を検出することで前記ゲート板対が全閉状態を検出するよう構成された、
    　請求項１または２に記載の組合せ秤。     The gate opening/closing drive unit
    an actuator whose operation is controlled by the gate control unit; and an opening/closing mechanism unit that opens and closes the gate plate pair in conjunction with the operation of the actuator,
    The fully-closed detector is
    The gate plate pair is configured to detect a fully closed state by detecting the position of a predetermined portion of the opening and closing mechanism,
    The combination weigher according to claim 1 or 2.
  5. 　前記計量部は、
    　前記ゲート板対と対応してその下方に設けられ、上方から供給される被計量物を搬送停止状態で一時保持し、保持した被計量物を搬出する計量コンベアと、
    　前記計量コンベアに取り付けられ、前記計量コンベア上の被計量物の重量を計量する重量センサとから構成され、
    　前記組合せ処理部により求められた組合せの被計量物を保持している前記計量コンベアから搬出される被計量物が供給され、供給される被計量物を搬送して外部へ排出する排出コンベアを、さらに備えた、
    　請求項１～４のいずれかに記載の組合せ秤。     The weighing unit
    a weighing conveyor provided below the pair of gate plates to temporarily hold the objects to be weighed supplied from above in a state in which conveyance is stopped and to carry out the held objects to be weighed;
    and a weight sensor attached to the weighing conveyor for measuring the weight of the object to be weighed on the weighing conveyor,
    a discharge conveyor to which the objects to be weighed carried out from the weighing conveyor holding the combination of objects to be weighed determined by the combination processing unit are supplied, and which conveys the supplied objects to be weighed and discharges them to the outside; further equipped,
    The combination weigher according to any one of claims 1 to 4.
PCT/JP2021/036414 2021-10-01 2021-10-01 Combination balance WO2023053440A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/036414 WO2023053440A1 (en) 2021-10-01 2021-10-01 Combination balance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2021/036414 WO2023053440A1 (en) 2021-10-01 2021-10-01 Combination balance

Publications (1)

Publication Number Publication Date
WO2023053440A1 true WO2023053440A1 (en) 2023-04-06

Family

ID=85782086

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/036414 WO2023053440A1 (en) 2021-10-01 2021-10-01 Combination balance

Country Status (1)

Country Link
WO (1) WO2023053440A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0060702A2 (en) * 1981-03-12 1982-09-22 Maatschappij Van Berkel's Patent N.V. Weighing, pricing, printing and labelling machines
JPH0590332U (en) * 1992-05-07 1993-12-10 大和製衡株式会社 Gate opening and closing device for hopper
JP2007050068A (en) * 2005-08-17 2007-03-01 Nippon Sharyo Seizo Kaisha Ltd Toilet seat opening/closing system
JP2011013003A (en) * 2009-06-30 2011-01-20 Yamato Scale Co Ltd Combination balance
JP2016223943A (en) * 2015-06-01 2016-12-28 大和製衡株式会社 Combination balance

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0060702A2 (en) * 1981-03-12 1982-09-22 Maatschappij Van Berkel's Patent N.V. Weighing, pricing, printing and labelling machines
JPH0590332U (en) * 1992-05-07 1993-12-10 大和製衡株式会社 Gate opening and closing device for hopper
JP2007050068A (en) * 2005-08-17 2007-03-01 Nippon Sharyo Seizo Kaisha Ltd Toilet seat opening/closing system
JP2011013003A (en) * 2009-06-30 2011-01-20 Yamato Scale Co Ltd Combination balance
JP2016223943A (en) * 2015-06-01 2016-12-28 大和製衡株式会社 Combination balance

Similar Documents

Publication Publication Date Title
US8070203B2 (en) Method for controlling vacuum-operated hoists and load protection device for vacuum-operated hoists
EP3533922A1 (en) Fabric folding device capable of multiple types of foldings
CN1818572A (en) Planar glass on-line weighing method, system and liftable weighing device
WO2023053440A1 (en) Combination balance
IE66375B1 (en) A lifting apparatus
JP5984610B2 (en) Combination weigher and device to be weighed provided therein
CN108699883B (en) Closure device for an access opening of an industrial machine
US10106382B2 (en) Chamber conveyor belt machine
KR20190058887A (en) Sensing device for reclaimer
JP6456237B2 (en) Combination scale
JP6448451B2 (en) Combination scale
CN209922707U (en) Slack rope detection device and stacker
KR20150111155A (en) Grain weighing machine having automatic opening and closing device
JP4761915B2 (en) Box sealing device
US6818841B1 (en) Non-disruptive computer-controlled in-line conveyor flow weight calibration scale
JP3198402U (en) Combination scale
CN105806459A (en) Combination scale
JPH1191930A (en) Work delivery device
JP6456248B2 (en) Combination scale
KR101294916B1 (en) Materials treatment apparatus
JP6847395B2 (en) How to put rubber material into rubber kneader and rubber kneader
JP6488671B2 (en) Grain dryer dust tube clogging detector
JP3392204B2 (en) Tension inspection method and apparatus for tying strap
CN108726142A (en) A kind of belt feed system and conveyer belt damage monitoring method
CN204777695U (en) Turnover machine

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21959474

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE