JP2012242102A - Combination balance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the time required for throwing an object to be weighed from a combination balance to a post-stage device.SOLUTION: In accordance with positions of weighing hoppers 9to 9selected for a combination by a suitable quantity for discharging an object to be weighed in a conveyance direction, driving of a feed conveyer 4 and opening/closing of an aggregate gate 45 are controlled, thereby controlling throwing of the object to be weighed into a post-stage packaging machine 19. Therefore, in the case where a distance between the weighing hopper 9which is positioned at a most upstream side among the weighing hoppers 9to 9selected for the combination by the suitable quantity for discharging the object to be weighed and the weighing hopper 9positioned at a most downstream side is long, the time required for throwing the object to be weighed into the packaging machine 19 can be shortened. Thus, regardless of the positions of the weighing hoppers 9to 9which are selected for the combination by the suitable quantity for discharging the object to be weighed in the conveyance direction, the object to be weighed can be thrown into the packaging machine 19 within a required throw-in time.

Description

  The present invention relates to a combination weigher that is arranged in a straight line, selects a combination of a plurality of hoppers to which an object to be weighed is supplied, and puts the object to be weighed in a predetermined weight range into a packaging machine or the like.

  As this type of combination weigher, for example, there is a semi-automatic combination weigher in which an object to be weighed is input by an operator's hand. This semi-automatic combination weigher is usually provided with a plurality of weighing hoppers arranged in a straight line and a transfer conveyor arranged below each weighing hopper, and an operator can place an object to be weighed on the weighing hopper. Directly or indirectly through a supply hopper above the weighing hopper. Based on the weight value of the objects to be weighed in each weighing hopper, combination calculation is performed and the combined weight, which is the combined total weight, is equal to or close to the target combination weight. The combination is selected, and the objects to be weighed by the weighing hopper selected for the appropriate combination are discharged to the conveyor. A conveyor conveys an object to be weighed along a conveying direction in which a plurality of weighing hoppers are arranged, and puts it into a subsequent apparatus, for example, a packaging machine from the conveying terminal (see, for example, Patent Document 1). ).

JP 2007-46968 A

  In such a combination weigher, as described above, the plurality of weighing hoppers are arranged in a straight line along the conveying direction of the conveying conveyor, and the objects to be weighed are discharged onto the conveying conveyor from the weighing hopper selected for the appropriate amount combination. Then, it is transported along the transport direction by the transport conveyor, and sequentially fed from the downstream transport end of the transport direction to the packaging machine as the subsequent apparatus.

  Therefore, depending on the discharge position of the objects to be discharged from the plurality of weighing hoppers selected for the appropriate amount combination, the objects to be discharged to the most upstream side in the transport direction and the objects to be discharged to the most downstream side And the most downstream object to be weighed is transported to the transport end of the transport conveyor and put into the packaging machine, and the most upstream object to be weighed is from the transport conveyor to the transport end of the transport conveyor. The charging time until the end of loading when being transported and loaded into the packaging machine is lengthened.

  Therefore, in the packaging machine, it is necessary to accept the input of the objects to be weighed from the transport conveyor over this long charging time, and the waiting time for receiving the charging becomes long. For this reason, the cycle time of the packaging process in a packaging machine becomes long, and there exists a subject that the operation speed as the whole measurement packaging system falls.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to shorten the time required for loading an object to be weighed from a combination weigher to a subsequent apparatus.

  In order to achieve the above object, the present invention is configured as follows.

  (1) The combination weigher of the present invention is arranged in a straight line, and a plurality of hoppers for holding and discharging the supplied objects to be weighed, and the objects to be weighed discharged from the plurality of hoppers are linearly arranged. Conveying means that conveys along a conveying direction that is an arrayed direction, and that is fed into the subsequent apparatus from the conveying end, combination calculating means that performs combination calculation and selects the appropriate amount of the hopper, and combination calculation Based on the calculation results of the means, the discharge of the objects to be weighed by the plurality of hoppers is controlled, the control means for controlling the conveyance by the conveyance means, and the object to be conveyed from the conveyance end of the conveyance means to the subsequent apparatus. An assembly gate provided on a weighing material input path and capable of holding and discharging the object to be weighed, wherein the control means selects the appropriate amount combination and discharges the object to be weighed Direction Depending on the location, by controlling the drive and the opening and closing of the set gate of said conveying means, for controlling the introduction of objects to be weighed to the further apparatus.

  The hopper may be any one that holds and discharges an object to be supplied, and may be any of a weighing hopper, a memory hopper, and the like. The weight of the object to be weighed may be measured by this hopper, or a weighed object to be weighed may be supplied.

  The plurality of hoppers may be arranged in a straight line, for example, may be arranged in a plurality of lines in a straight line.

  The conveying means conveys the objects to be discharged discharged from a plurality of hoppers arranged in a line along a conveying direction that is a direction arranged in a line.

  The latter apparatus is an apparatus disposed on the downstream side in the conveyance direction of the object to be weighed, and is preferably a packaging machine for packaging the object to be weighed, but may be an inspection apparatus, a sorting apparatus, or the like.

  An appropriate amount combination refers to a combination that satisfies the combination conditions. For example, the combination weight that is the total weight of the weights of the objects to be weighed is equal to the target combination weight or within an allowable weight range closest to the target combination weight. Refers to a combination.

  The collecting gate is provided in the input path of the objects to be weighed from the conveyance end of the conveying means to the subsequent apparatus, and the objects to be weighed can be held by opening and closing the gate, and the held objects to be discharged are discharged. Alternatively, the object to be weighed from the end of conveyance can be passed.

  According to the combination weigher of the present invention, the control means selects the appropriate amount combination and discharges the object to be weighed according to the position of the hopper in the conveying direction, which discharges the object to be weighed, that is, from which position of the hopper in the conveying direction. Depending on whether or not it is done, the driving of the conveying means and the opening and closing of the collecting gate are controlled to control the input of the object to be weighed into the subsequent apparatus.

  Therefore, for example, when the distance between the hopper located on the most upstream side in the conveying direction and the hopper located on the most downstream side among the hoppers selected for the appropriate amount combination is long, the hoppers of the appropriate amount combination are discharged. If the object to be weighed is transported to the transport end of the transport means and then put into the subsequent apparatus as it is, the charging time becomes longer. According to the present invention, the transport means is driven to discharge the object to be weighed from the transport end. On the other hand, close the collecting gate to hold and collect the objects to be discharged from the end of conveyance, delay the timing of starting loading into the subsequent apparatus, and then open the collecting gate to hold the objects to be weighed. It is possible to start feeding into the latter apparatus and to pass the object to be weighed discharged from the conveyance end as it is and into the latter apparatus. In this way, the collection gate collects the objects to be weighed together, and by delaying the timing of starting the addition to the subsequent apparatus, the input time of the object to be measured to the subsequent apparatus can be shortened. In the latter apparatus, the waiting time for accepting the input of the object to be weighed can be shortened.

  Conversely, if the distance between the hopper located on the most upstream side in the conveying direction and the hopper located on the most downstream side among the hoppers selected for the appropriate amount combination is short, the hoppers are discharged from the appropriate amount combination hopper. Since the time required for transporting the object to be transported to the transport end of the transport means and putting it into the subsequent apparatus is short, according to the present invention, the transport means is driven to transport the object to be weighed from the transport end. While discharging the weighing object, the collection gate can be opened and the object to be weighed can be loaded into the subsequent apparatus, and the timing of starting loading into the subsequent apparatus is adjusted according to the driving start timing of the conveying means. be able to.

  As described above, according to the present invention, among the hoppers that are selected as appropriate combinations and discharge the objects to be weighed, the distance in the conveying direction between the hopper located on the most upstream side and the hopper located on the most downstream side is long. In this case, it is possible to shorten the time for putting the object to be measured into the subsequent apparatus, and this makes it possible to select the appropriate amount of combination, regardless of the position in the transport direction of the hopper that discharges the object to be weighed. The object to be weighed can be thrown into the subsequent apparatus within the time.

  (2) In a preferred embodiment of the present invention, the transport means is a transport conveyor disposed below the hopper, the latter apparatus is a packaging machine, and the control means is connected to the packaging machine. On the basis of the input request signal, the input start and input time of the object to be weighed into the packaging machine are controlled.

  According to this embodiment, on the basis of the input request signal from the packaging machine, it is possible to control the driving of the conveyor and the opening and closing of the collecting gate, and to start the input of the objects to be weighed into the packaging machine at a required timing. At the same time, the objects to be weighed can be loaded into the packaging machine within the required loading time.

  (3) In the embodiment of the above (2), the control means is the most upstream hopper and the most downstream hopper in the transport direction among the hoppers that are selected as the appropriate combination and discharge the objects to be weighed. When the distance along the transport direction is equal to or longer than a predetermined length, the transport conveyor is driven in response to the input request signal to transport the objects to be weighed, and the collecting gate is closed to close the transport conveyor After holding the objects to be weighed supplied from the end of conveyance, the collecting gate may be opened to put the objects to be weighed into the packaging machine.

  The distance in the conveyance direction between the most upstream hopper and the most downstream hopper in the conveyance direction corresponds to the distance along the conveyance direction between the position of the most upstream hopper and the position of the most downstream hopper. There is no particular limitation on which part of the hoppers the distance is based on. For example, based on the center position in the transport direction of each hopper, the distance between the center position in the transport direction of the most upstream hopper and the center position in the transport direction of the most downstream hopper, or The distance between the position of the upstream end of the most upstream hopper and the position of the downstream end of the most downstream hopper may be determined based on the position of the end of each hopper.

  The predetermined length is preferably set in advance according to the operation speed of the weighing and packaging system, and the predetermined length becomes shorter as the operation speed is increased.

  According to this embodiment, for example, among the hoppers selected for the appropriate amount combination, the distance along the transport direction between the most upstream hopper and the most downstream hopper in the transport direction is a predetermined length or more, and When the discharged objects to be weighed are transported to the end of transport of the transport conveyor and put into the packaging machine as they are, if the charging time is long, the transport conveyor is driven and the objects to be weighed are transported from the end of transport. While discharging, close the collecting gate to hold and collect a part of the objects to be discharged from the end of conveyance, delay the start timing of charging into the packaging machine, and then open and hold the collecting gate Since the weighing object discharged from the end of conveyance can be passed as it is to the packaging machine, the loading time into the packaging machine can be shortened. It is possible.

  In addition, the collection gate does not hold and collect all the objects to be discharged from the transfer end of the transfer conveyor, but delays the start timing so that a part of them is collected and the required input time is reached. As a result, there is no need to increase the size of the collecting gate as in the case of holding all of the objects to be discharged from the conveyance end, and when holding and discharging all of the objects to be weighed. In addition, it is possible to prevent a situation in which objects to be weighed are clogged at the collecting gate and cannot be discharged.

  (4) In the above embodiments (2) and (3), the control means is the most upstream hopper in the transport direction among the hoppers that are selected as the appropriate combination and discharge the objects to be weighed. When the distance along the conveyance direction with the downstream hopper is less than a predetermined length, the conveyance conveyor is driven with a delay from the loading request signal to convey the objects to be weighed, while responding to the loading request signal Then, the collection gate may be opened and the objects to be weighed may be thrown into the packaging machine from the conveyance end of the conveyance conveyor.

  According to this embodiment, for example, the distance along the transport direction between the most upstream hopper and the most downstream hopper in the transport direction among the hoppers that discharge the objects to be weighed selected for an appropriate amount combination is a predetermined length. If it is less than the time, and the time to transport the objects to be weighed discharged from the hopper to the transport end of the transport conveyor and put into the packaging machine is short, the transport object is discharged from the transport end by the transport conveyor, The collection gate can be opened and the objects to be weighed can be put into the packaging machine as they are from the end of the conveyance, and the timing for starting the introduction to the packaging machine can be adjusted by the timing of starting the driving of the conveyance conveyor.

  In addition, the collecting gate is opened in response to the input request signal, and the objects to be weighed discharged from the conveying terminal of the conveying conveyor are passed without being held, so that the objects to be weighed are not clogged by the collecting gate.

  According to the present invention, the object to be weighed to the subsequent apparatus is controlled by controlling the driving of the conveying means and the opening and closing of the collecting gate according to the position in the conveying direction of the hopper which is selected as an appropriate amount combination and discharges the object to be weighed. Therefore, when the distance between the hopper located on the most upstream side in the conveying direction and the hopper located on the most downstream side is long among the hoppers that are selected as an appropriate combination and discharge the object to be weighed, The input time of the object to be weighed into the latter apparatus can be shortened, so that the rear stage is within the required input time regardless of the position in the transport direction of the hopper that is selected as an appropriate combination and discharges the object to be weighed. The object to be weighed can be loaded into the apparatus, and the waiting time for receiving the object to be weighed can be shortened in the latter apparatus.

FIG. 1 is a schematic plan view of a combination weigher according to an embodiment of the present invention. FIG. 2 is a schematic front view of the combination weigher of FIG. FIG. 3 is a schematic side view of the combination weigher of FIG. FIG. 4 is a block diagram showing a control system of the combination weigher of FIG. FIG. 5 is a schematic diagram showing an example of the operation from the discharge of the object to be weighed to the conveyor to the insertion into the packaging machine. FIG. 6 is a time chart for explaining the operation of FIG. FIG. 7 is a schematic diagram showing an example of the operation from the discharge of the object to be weighed to the conveyor to the insertion into the packaging machine. FIG. 8 is a time chart for explaining the operation of FIG. FIG. 9 is a schematic plan view of a combination weigher according to another embodiment of the present invention. FIG. 10 is a schematic front view of the combination weigher of FIG. FIG. 11 is a schematic side view of the combination weigher of FIG. FIG. 12 is a schematic plan view of a combination weigher according to still another embodiment of the present invention. FIG. 13 is a schematic front view of the combination weigher of FIG. FIG. 14 is a schematic side view of the combination weigher of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a schematic plan view of a semi-automatic combination weigher according to an embodiment of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a side view thereof.

  The combination weigher 1 of this embodiment is a semi-automatic combination weigher that manually supplies an object to be weighed, and the object to be weighed is not particularly limited, but raw meat such as chicken (broiler), fish and shellfish such as squid and skipjack For example, it is suitable for weighing objects to be weighed and having a relatively large unit weight (weight per piece).

  The semi-automatic combination weigher 1 of this embodiment includes a main body 2 that performs combination weighing of objects to be weighed, operation control parameters of the scale 1, for example, setting of target combination weight, allowable upper limit value, and display of operation status. The operation setting display part 3 which performs and the conveyance conveyor 4 which conveys the to-be-measured object discharged | emitted from the main body 2 are provided.

The main body 2 includes a base 5 and a top plate 6 that is positioned above the base 5 and has a substantially rectangular shape in plan view. As shown in FIG. 1, the top plate 6 has a plurality of, in this embodiment, nine input ports 12 _{1 to} 12 ₉ for an operator to grab and input an object to be weighed, in the central portion at a predetermined interval. They are arranged in a straight line.

Under the respective inlets 12 _{1 to} 12 ₉ , supply hoppers 7 _{1 to} 7 ₉ corresponding to the respective inlets are arranged. Below each feed hopper 7 _{1-7 9,} the weighing hoppers 91 _to 93 ₉ corresponding individually, are arrayed in a straight line. These weighing hoppers 9 _{1 to} 9 ₉ are supported by the base 5. As shown in FIG. 3, nine weighing sensors 10 ₁ to 10 ₉ are stored on the side of the base 5. These weighing sensors 10 ₁ to 10 _9, for example, a load cell, is connected individually to each of the weighing hoppers 91 _to 93 _9.

Each weighing hopper 91 _to 93 ₉ to meter accommodating respectively the objects to be weighed supplied from the feed hopper 7 _{1-7 9,} in the longitudinal direction (lateral direction, the vertical direction in FIG. 1 in FIG. 3) In addition, one measuring chamber 11 ₁ a to 11 ₉ a; 11 ₁ b to 11 ₉ b are provided in each of the front side chamber and the back side chamber in total.

These measuring chambers 11 ₁ a to 11 ₉ a; 11 ₁ b to 11 ₉ b are partitioned by central partition walls 35 _{1 to} 35 ₉ . The base 5 houses a control circuit (not shown) which will be described later.

As shown in FIG. 3, each of the supply hoppers 7 _{1 to} 7 ₉ has a pair of gates 13 ₁ a to 13 ₉ a; 13 ₁ b to 13 ₉ b that are driven to open and close by an air cylinder (not shown). doing. These gates 13 ₁ a to 13 ₉ a; 13 ₁ b to 13 ₉ b can be opened and closed independently, and one of the gates 13 ₁ a to 13 ₉ a (or 13 ₁ b to 13 ₉ b) Is configured so that an object to be weighed can be selectively supplied to one of the weighing chambers 11 ₁ a to 11 ₉ a (or 11 ₁ b to 11 ₉ b) of the weighing hoppers 9 _{1 to} 9 _9. ing.

Since the weighing hoppers 9 _{1 to} 9 ₉ are respectively connected to the weighing sensors 10 ₁ to 10 ₉ as described above, the objects to be weighed are fed from the supply hoppers 7 _{1 to} 7 ₉ to the weighing hoppers 9 _{1 to} 9 ₉ . When supplied to any one of the weighing chambers 11 ₁ a to 11 ₉ a (or 11 ₁ b to 11 ₉ b), each of the weighing chambers 11 ₁ a to 11 ₉ a is changed based on a change in weight value detected by each weighing sensor 10 ₁ to 10 ₉ . The objects to be weighed supplied to the measuring chambers 11 ₁ a to 11 ₉ a (or 11 ₁ b to 11 ₉ b) can be measured.

Weighing hoppers 91 _to 93 _9, the gate 23 ₁ a~23 ₉ a of the front and rear in the direction of the front side of the metering chamber 11 ₁ a~11 ₉ a front side, the back side of the metering chamber 11 ₁ b~11 ₉ b Have rear gates 23 ₁ b to 23 ₉ b. These gates are driven to open and close by an air cylinder (not shown). Note that the opening and closing of the gate is not limited to the air cylinder, and for example, a motor may be used.

The front gates 23 ₁ a to 23 ₉ a and the rear gates 23 ₁ b to 23 ₉ b can be opened and closed independently, and one of the gates 23 ₁ a to 23 ₉ a is opened. in, then discharge the objects to be weighed from the corresponding one of the measuring chamber 11 ₁ a~11 ₉ a, also, by opening the other gate 23 ₁ b~23 ₉ b, the other weighing chamber 11 ₁ b~11 ₉ The object to be weighed is discharged from b. If the gates 23 ₁ a to 23 ₉ a; 23 ₁ b to 23 ₉ b on both sides are opened at the same time, the objects to be weighed are measured from the weighing chambers 11 ₁ a to 11 ₉ a; 11 ₁ b to 11 ₉ b on both sides. Discharged.

Conveyor 4 is supported by a base 5, as the conveying direction of the weighing hoppers 91 _to 93 ₉ linear row arrangement direction and the objects to be weighed and a (FIG. 1, the left-right direction in FIG. 2) to be parallel It is disposed below the weighing hoppers 91 _to 93 _9.

The transport conveyor 4 is configured to remove the objects to be discharged from the respective weighing chambers 11 ₁ a to 11 ₉ a; 11 ₁ b to 11 ₉ b of the weighing hoppers 9 _{1 to} 9 ₉ in the downstream side in the transport direction (FIG. 1, FIG. 2 to the right side), and is fed from the conveying terminal 4a to a subsequent packaging machine (not shown) disposed below the conveying terminal 4a.

In this combination weigher, the weighing chambers 11 ₁ a to 11 ₉ a and 11 _{1 of the} weighing hoppers 9 _{1 to} 9 ₉ have been weighed by the weighing sensors 10 ₁ to 10 ₉ at the timing of the combination calculation at regular time intervals. Various combinations of the weights of the objects to be weighed b to 11 ₉ b, and the combination weight (total weight) among these combinations is an appropriate amount within the predetermined weight range that is equal to or closest to the target combination weight Search for a combination, that is, perform a combination operation. Then, the combination is established, and the gates of the weighing chambers 11 ₁ a to 11 ₉ a and 11 ₁ b to 11 ₉ b of the weighing hoppers 9 _{1 to} 9 ₉ in which the objects to be weighed in the proper combination selected are accommodated. 23 ₁ a to 23 ₉ a, 23 ₁ b to 23 ₉ b are opened, discharged onto the lower transfer conveyor 4, and placed by the transfer conveyor 4 on the transfer end 4 a side of the transfer conveyor 4. The material to be weighed is packed by a packaging machine.

In this manner, the discharge of the objects to be weighed, the weighing chamber _{11 1 a~11 9 a, 11 1} b~11 9 b of the weighing hoppers 91 _to 93 ₉ emptied thereabove The objects to be weighed are supplied from certain supply hoppers 7 _{1 to} 7 ₉ . As a result, the objects to be weighed are supplied manually to the empty supply hoppers 7 _{1 to} 7 ₉ .

  In this embodiment, in order to shorten the charging time of the objects to be weighed discharged from the conveying terminal 4a of the conveying conveyor 4 to the packaging machine, the objects to be weighed from the conveying terminal 4a of the conveying conveyor 4 to the lower packaging machine. A collection gate 45 is provided in the material input path.

  The collective gate 45 is supported by the base 5 and, as shown in FIG. 2, includes an accommodating portion 45a for accommodating an object to be weighed, and a gate portion 45b, and the gate portion 45b is closed for transport. The object to be weighed discharged from the transfer terminal 4a of the conveyor 4 is held in the container 45a, the gate part 45b is opened, and the object to be weighed held in the container 45a is put into a packaging machine, or The object to be weighed discharged from the conveyance end 4a is passed as it is.

  FIG. 4 is a block diagram showing the control system of this embodiment, and parts corresponding to those in FIGS. 1 to 3 are given the same reference numerals.

The combination weigher 1 of this embodiment includes a control circuit 22, and the control circuit 22 has a function as a control unit for controlling each unit and a CPU unit having a function as a combination calculation unit for performing a combination calculation. 24, a memory unit 25 in which a control program is stored and a measurement value and the like are stored, and a pair of gates 13 ₁ a to 13 ₉ a of each of the supply hoppers 7 _{1 to} 7 ₉ ; 13 ₁ b to 13 a supply hopper gate driver circuit unit 26 for opening and closing the ₉ b, each weighing hopper 91 _to 93 a pair of gates 23 of _{9 1 a~23 9} a; weighing hopper gate driver circuit unit 27 for opening and closing the 23 ₁ b~23 ₉ b When an a / D converter circuit 29 for converting an analog signal to a digital signal from each of the weighing sensors 10 ₁ to 10 _9, the conveyor drive circuit 31 for driving the conveyor 4, which is connected to the packaging machine I And O circuit part 32, and a set gate drive circuit 28 for controlling the opening and closing of the gate portion 45b of the set gate 45.

The digital signal from the A / D conversion circuit unit 29 is converted into a measurement value in the CPU unit 24. CPU 24, the weight of the weighing hoppers 91 _to 93 each weighing chambers 11 _{1 9 a~11 9} a, 11 _{1 b~11} the objects to be weighed which have been supplied to the ₉ b weighed, the combination of fixed time intervals The above-described combination calculation is performed at the calculation timing. When the combination is established and there is an appropriate amount combination, the weighing chambers 11 ₁ a to 11 ₉ a; 11 ₁ b to 11 ₉ b of the weighing hoppers 9 _{1 to} 9 ₉ of the appropriate amount combination are connected via the weighing hopper gate drive circuit unit 27. The gates 23 ₁ a to 23 ₉ a; 23 ₁ b to 23 ₉ b are controlled to open and close, and the weighing chambers 11 ₁ a to 11 ₉ a; 11 ₁ b to 11 ₉ b of the selected weighing hoppers 9 _{1 to} 9 ₉ are controlled. Are to be discharged onto the conveyor 4.

That is, the CPU unit 24 performs a combination calculation, and when the combination is established, the measurement units 11 ₁ a to 11 ₉ a; 11 ₁ b to 11 ₉ b of the weighing hoppers 9 _{1 to} 9 ₉ selected as appropriate combinations Gates 23 ₁ a to 23 ₉ a; 23 ₁ b to 23 ₉ b are opened, the objects to be weighed are discharged to the transfer conveyor 4 and transferred as described later in response to an input request signal from the packaging machine. By controlling the driving of the conveyor 4 and the opening and closing of the collecting gate 45, the objects to be weighed are put into the packaging machine. When the loading of the objects to be weighed into the packaging machine by the conveyor 4 is finished, the CPU 24 stops driving the conveyor 4 and transmits a loading completion signal to the packaging machine.

  In addition, in the case of an object to be weighed with a poor weight that cannot be combined, a so-called rejection is performed in which it is discharged to the transport conveyor 4, transported in the opposite direction to the packaging machine, and transported to the collection container.

  Next, the operation of conveying an object to be weighed and putting it into a packaging machine in this embodiment will be described.

  The packaging machine according to this embodiment is a bag-feeding type packaging machine that receives an object to be weighed from the combination weigher 1, fills a pre-formed bag, and performs vacuum packing.

  This packaging machine permits the acceptance of the input of an object to be weighed from the combination weigher 1 after a certain preparation time has elapsed from the transmission of the above input request signal until the preparation for the acceptance of the input is completed. It becomes a period. The length of the charging permission period is set according to the operation speed of the weighing and packaging system including the combination weigher 1 and the packaging machine. In this embodiment, in order to operate the weighing packaging system at a desired high speed, the input permission period is set to be relatively short.

In this embodiment, the conveyance direction of the weighing hoppers 91 _to 93 _9, which is selected as the optimal combination by combination calculation in accordance with the position in (Fig. 1, left-right direction in FIG. 2) controls the driving of the conveyor 4, by controlling the opening and closing of the set gate 45, on the basis of the closing request signal from the packaging machine, to the closing the permission period, the measuring chamber 11 of the weighing hoppers 91 _to 93 ₉ optimal combinations _{1 a~11 9} a; The objects to be weighed discharged from 11 ₁ b to 11 ₉ b are put into the packaging machine. Each weighing hopper 9 _{1 to} 9 ₉ has two weighing chambers 11 ₁ a to 11 ₉ a; 11 ₁ b to 11 ₉ b in the front-rear direction. the same, for example, the position in the conveying direction of the metering chamber 11 ₁ b of the weighing hopper 9 ₁ on the front side of the metering chamber 11 ₁ a and the back side are the same, in the following description for simplicity, the metering chamber Will be described as one row of weighing hoppers 9 _{1 to} 9 ₉ along the transport direction.

In this embodiment, among the weighing hoppers 9 _{1 to} 99 ₉ that are selected as an appropriate amount combination and discharge an object to be weighed, a distance along the conveying direction between the most upstream weighing hopper and the most downstream weighing hopper in the conveying direction. However, the control of the conveyor 4 and the collecting gate 45 is made different depending on whether or not the length is longer than a predetermined length. This predetermined length is preferably set in advance within a distance that can be transported by the transport conveyor 4 during the charging permission period of the packaging machine, for example.

First, among the weighing hoppers 9 _{1 to} 99 ₉ that are selected as an appropriate combination by the combination calculation and discharge the objects to be weighed, the distance along the conveying direction between the most upstream weighing hopper and the most downstream weighing hopper in the conveying direction Will be described based on FIG. 5 and FIG. 6.

5, to discharge the objects to be weighed to the conveyor 4 from the weighing hoppers 91 _to 93 _9, which is selected as the optimal combination by combination calculation, then conveyed to the conveyance end 4a by a transport conveyor 4, the packaging through the set gate 45 FIG. 6 is a schematic diagram illustrating an example of an operation until the machine 19 is thrown into a chute 19a. FIG. 6 is a time chart of FIG. 5, in which FIG. 6A shows the input request signal, FIG. 6B shows the driving state of the conveyor 4, and FIG. 6C shows the open / close state of the collecting gate 10. Each is shown. 6B, the high level indicates a state where the conveyor 4 is driven, and in FIG. 6C, the high level indicates an opened state of the collecting gate 45.

  In FIG. 5, the conveyance distance which is the length of the conveyance conveyor 4 is set to L, and the said predetermined length is set to L1. In this embodiment, the predetermined length L1 is, for example, the length from the upstream end to the downstream end of five weighing hoppers along the transport direction.

In the example of FIG. 5, as shown in FIG. 5A, the weighing objects 20 ₁ , 20 ₅ , 20 ₇ from the weighing hoppers 9 ₁ , 9 ₅ , 9 ₇ , 9 ₉ selected as an appropriate combination by the combination calculation. , 20 ₉ are discharged onto the conveyor 4. In this case, the weighing hopper 9 ₁ selected in optimal combinations, 9 _5, 9 _7, 9 ₉ among the most downstream side of the downstream weighing hopper 9 ₉ the most upstream weighing hopper 9 ₁ on the upstream side of the end portion The distance along the conveying direction with the end on the side is nine weighing hoppers, and is equal to or longer than the predetermined length L1 corresponding to the five weighing hoppers described above.

The distance between the weighing hopper 9 ₉ Thus the most upstream side of the weighing hopper 9 ₁ the most downstream side in the transport direction, if more than a predetermined length L1, the most downstream side of the objects to be weighed by the conveyor 4 20 ₉ poured time to put its direct packaging machine 19 most upstream the articles 20 from ₁ was charged directly from the transfer terminal end 4a from the transport end 4a to the packaging machine 19, the above-described packaging machine 19 Therefore, it is necessary to shorten the charging time. In addition, after a certain preparation time from the input request signal of the packaging machine 19 until the preparation for receiving the input is completed, it is necessary to start the input into the packaging machine 19, that is, the timing of the start of the input is adjusted. There is a need.

Therefore, in this embodiment, in response to the high-level input request signal shown in FIG. 6A, as shown in FIG. 6B, the conveyor 20 is immediately driven and discharged. _1, 20 _5, 20 _7, starts 20 ₉ transport of. At this time, until the preparation time of the packaging machine 19 elapses, the collective gate 45 is not inserted into the packaging machine 19 and the collecting gate 45 is arranged so as to shorten the charging time. It is closed as shown in

Thus, FIG. 5 (b), the (c), the conveyor 4 is driven objects to be weighed 20 _1, 20 _5, 20 _7, 20 ₉ is conveyed, downstream side of the objects to be weighed 20 _9, 20 ₇ is discharged from the transfer terminal 4a, held in the collecting gate 45, and collected.

  Then, as shown in FIG. 6C, when a certain waiting time T has elapsed since the receipt of the insertion request signal, the collective gate 45 is opened. This waiting time T is a time longer than a certain preparation time until the packaging machine 19 transmits a loading request signal and is ready to accept loading. Therefore, when the waiting time T has elapsed, the packaging machine 19 is in an insertion permission period for permitting acceptance of the input of the objects to be weighed.

Further, the waiting time T is a time required for transporting, for example, a distance (L-L1) obtained by subtracting a predetermined length L1 from the transport distance L shown in FIG. Therefore, assuming that the driving of the conveyor 4 is started immediately in response to the input request signal and the collecting gate 45 is opened, the four weighing hoppers 9 ₆ to 9 on the downstream side when the waiting time T elapses. 9 ₉ objects to be weighed which have been discharged from and will be put into the packaging machine 19.

In this embodiment, as described above, since the waiting time T has elapsed and the collecting gate 45 is opened, the objects 20 to be weighed held by the collecting gate 45 are shown in FIGS. ₉ and 20 ₇ are fed into the packaging machine 19, and the subsequent objects to be weighed 20 ₅ and 20 ₁ are also fed into the packaging machine 19 through the collecting gate 45.

Thus the weighing hopper 9 is selected optimal combination by combination calculation _1, 9 _5, 9 _7, 9 ₉ among the most downstream weighing the end portion on the most upstream side of the weighing hopper 9 ₁ upstream hopper 9 _When the distance from the downstream end of ₉ is equal to or longer than the predetermined length L1, the conveying conveyor 4 is driven in response to the input request signal from the packaging machine 19 to convey the objects to be weighed and the conveying terminal 4a The collection gate 45 is closed and the objects to be weighed 20 ₉ , 20 ₇ on the downstream side discharged from the conveyance end 4a are held and assembled, and the timing of starting the charging into the packaging machine 19 is delayed.

Then, when the waiting time T corresponding to the preparation time when preparation for receiving the filling of the packaging machine 19 is completed and the charging permission period is reached, the objects to be weighed 20 ₉ , 20 that have opened and held the collecting gate 45. ₇ is discharged and started to be put into the packaging machine 19 and the subsequent upstream objects 20 ₅ and 20 ₁ are also passed through the collecting gate 45 and put into the packaging machine 19, so the collecting gate 45 is opened. it can be put into the articles 20 ₉ charged with starting the last on enable period by shortening the on time to the end of the introduction of objects to be weighed 20 _1.

Moreover, the collective gate 45 does not hold all of the objects to be weighed 20 ₁ , 20 ₅ , 20 ₇ , and 20 ₉ discharged from the transfer terminal 4a of the transfer conveyor 4, but transfers them until the waiting time T elapses. objects to be weighed downstream Towards discharged from the conveyance end 4a of the conveyor 4 20 _7, 20 ₉ may hold. Therefore, it is not necessary to increase the capacity of the collecting gate 45 as in the case of holding all the objects to be weighed, and when the objects to be weighed with the collecting gate 45 opened are discharged, the objects to be weighed are discharged. It is possible to prevent a situation in which the battery is clogged with the collecting gate 45 and cannot be discharged.

Further, after opening the set gate 45, together with the objects to be weighed 20 ₇ downstream toward that held, 20 ₉ are discharged from the collecting gate 45, objects to be weighed subsequent upstream closer 20 _5, 20 ₁ Since the objects to be weighed 20 ₇ and 20 ₉ held by the collecting gate 45 are clogged at the time of discharge, the subsequent objects to be weighed 20 ₅ and 20 ₁ are dropped. Clogging can be eliminated by impact.

  Next, among the weighing hoppers selected as appropriate combinations by the combination calculation, the distance along the transport direction between the upstream end of the most upstream weighing hopper and the downstream end of the most downstream weighing hopper is The case where the length is less than the predetermined length L1 will be described with reference to FIGS. 7 and 8 corresponding to FIGS. 5 and 6, respectively.

Figure 7 is to discharge the objects to be weighed 20 _{6-20 9} from the weighing hopper 9 _{6-9 9} selected as optimal combination by combination calculation in conveyor 4, and conveyed to the transfer terminal end 4a by a transport conveyor 4, the set gate FIG. 8 is a schematic diagram illustrating an example of an operation until the chute 19a of the packaging machine 19 is inserted through 45, and FIG. 8 is a time chart of FIG.

In this example, as shown in FIG. 7A, the weighing objects 20 ₆ , 20 ₇ , 20 ₈ , 20 from the weighing hoppers 9 ₆ , 9 ₇ , 9 ₈ , 9 ₉ selected as an appropriate amount combination by the combination calculation. ₉ is discharged onto the conveyor 4. In this case, the distance between the most upstream side of the weighing hoppers 8 upstream end and the most downstream side of the downstream side of the weighing hopper 8 ₉ end of ₆ is a weighing hopper 4 pieces of weighing hoppers 5 min Is less than a predetermined length L1.

In this case, the most upstream side of the objects to be weighed 20 ₆ from the transfer terminal end most downstream side of the objects to be weighed 20 ₉ was charged directly to the packaging machine 19 from the transfer terminal end 4a by a transport conveyor 4 to the packaging machine 19 Since the charging time required for direct loading is within the time corresponding to the above-described loading permission period of the packaging machine 19, it is not necessary to hold the objects to be weighed by the collective gate 10 and shorten the loading time. . However, it is necessary to start charging after the above-described waiting time T corresponding to the preparation time when preparation for receiving the input is completed from the input request signal of the packaging machine 19, that is, it is necessary to adjust the timing for starting the input. is there.

  In the case of FIG. 5 and FIG. 6 described above, in order to shorten the input time of the objects to be weighed, the collective gate 45 is closed to hold the objects to be weighed downstream. Therefore, as shown in FIGS. 5C and 5D, when the collection gate 45 is opened and the input of the objects to be weighed into the packaging machine 19 is started, the objects to be weighed are already held in the collection gate 45. ing.

  On the other hand, in the case of FIG. 7 and FIG. 8, it is not necessary to hold the objects to be weighed by the collecting gate 45 to shorten the charging time, and the objects to be weighed are not held by the collecting gate 45.

Therefore, as shown in FIG. 7 (a), the most downstream toward the objects to be weighed 20 _9, taking into account the transport time T1 required to transfer the distance L2 from the transfer terminal end 4a of the conveyor 4 to set the gate 45 Like to do.

More specifically, when the waiting time T described above from the reception of the input request signal has elapsed, for the most downstream side of the objects to be weighed 20 ₉ is to be transferred to the position of the set gate 10, waiting time T When the waiting time (T-T1) obtained by subtracting the transfer time T1 from the time has elapsed, the driving of the conveyor 4 is started.

  That is, in response to the input request signal in FIG. 8 (a), the collecting gate 45 is immediately opened as shown in FIG. 8 (c), while the conveyor 4 is input as shown in FIG. 8 (b). After the waiting time (T-T1) has elapsed since the reception of the request signal, driving is started and the object to be weighed is discharged from the conveyance end 4a.

Therefore, when the waiting time (T-T1) elapses from the input request signal, as shown in FIG. 7B, the driving of the conveyor 4 is started and the objects to be weighed 20 ₆ , 20 ₇ , 20 ₈ , 20 ₉ is transported, discharged from the transport end 4a, and passed through the open collecting gate 45 as shown in FIG.

Thus the weighing hopper 9 is selected optimal combination by combination calculation _1, 9 _5, 9 _7, 9 ₉ of the downstream side of the most downstream side of the weighing hopper and upstream of the end of the most upstream side of the weighing hoppers When the distance along the conveying direction with the end of the bag is less than the predetermined length L1, the assembly gate 45 is immediately opened in response to the insertion request signal from the packaging machine 19, while the preparation time of the packaging machine 19 has elapsed. when it is turned permission period Te, as the most downstream side of the objects to be weighed 20 ₉ is placed in a packaging machine 19, the start of driving of the transport conveyor 4, because the delay waiting time (T-T1), above as in FIG. 5 and 6, at a timing corresponding to the start of the closing permission period of the packaging machine 19, to the packaging machine 19 to start-up of the objects to be weighed 20 _9, all of the within-on enable period turning on the weighed 20 _6, 20 _7, 20 _8, 20 ₉ Door can be.

Moreover, the set gate 45, since no holding objects to be weighed 20 _6, 20 _7, 20 _8, 20 ₉ at all, never situation objects to be weighed can not be discharged jammed a set gate 45 is generated.

As described above, in this embodiment, among the weighing hoppers 9 _{1 to} 99 ₉ that are selected as an appropriate combination and discharge the objects to be weighed, the most upstream weighing hopper and the most downstream weighing hopper in the conveying direction. When the distance along the transport direction is equal to or longer than the predetermined length L1, the time for putting the object to be weighed into the packaging machine 19 is shortened, and the distance along the transport direction is less than the predetermined length L1, An object to be weighed can be charged within the charging permission period of the packaging machine 19.

Therefore, among the weighing hoppers 9 _{1 to} 99 ₉ , which are selected as an appropriate combination for the input permission period of the packaging machine 19 and discharge the objects to be weighed, the most upstream weighing hopper and the most downstream weighing hopper in the conveying direction It is not necessary to lengthen the distance along the conveyance direction in consideration of the case where the distance is equal to or longer than the predetermined length L1. As a result, the waiting time for accepting and receiving the packaging machine 19 can be shortened and the cycle time of the packaging process can be shortened, and accordingly, the operation speed of the entire weighing and packaging system can be increased to improve the production amount. Can do.

  Moreover, it is possible to effectively prevent the objects to be weighed from being clogged at the collecting gate 10.

  In the above-described embodiment, among the weighing hoppers selected as appropriate combinations by the combination calculation, in the transport direction between the upstream end of the most upstream weighing hopper and the downstream end of the most downstream weighing hopper. When the distance along the line is less than the predetermined length L1, the collection gate 45 is opened in response to the input request signal, and the input of the objects to be weighed into the packaging machine 19 is started at the timing when the conveyor 4 starts to be driven. However, as another embodiment of the present invention, the conveyance conveyor 4 is driven in response to the input request signal, while the collection gate 45 is closed to hold the objects to be weighed and the collection gate 45 is opened. Thus, the timing for starting to put the objects to be weighed into the packaging machine 19 may be adjusted.

(Embodiment 2)
9 is a schematic plan view of a semi-automatic combination weigher according to another embodiment of the present invention, FIG. 10 is a front view thereof, FIG. 11 is a side view thereof, and FIGS. The parts corresponding to are assigned the same reference numerals.

In the combination weigher 1a of this embodiment, as shown in FIG. 9, the top plate 6 has nine input ports 12 _{1 to} 12 ₉ arranged in a straight line, and below the input ports 12 _{1 to} 12 ₉ . the, as shown in FIGS. 10 and 11, are weighing hoppers 14 _{1-14 9} nine individually corresponding to each disposed further below each weighing hopper 14 _{1-14 9,} the front-rear direction A pair of memory hoppers 15 ₁ to 15 ₉ and 16 _{1 to} 16 ₉ are arranged in the left-right direction of FIG. 11 and the vertical direction of FIG.

The weighing hoppers 14 _{1 to} 14 ₉ are arranged in a line in a straight line along the conveying direction of the objects to be weighed by the conveying conveyor 4, and the memory hoppers 15 ₁ to 15 ₉ and 16 _{1 to} 16 ₉ are arranged in the conveying direction. It is arranged in two lines along the straight line.

The base 5, as shown in FIG. 11, each weighing hopper 14 _{1-14 9} Weighing nine consisting load cells connected separately to the sensor 10 ₁ to 10 ₉ are stored. Each weighing sensor 10 ₁ to 10 ₉ measures the weight of an object to be weighed put into each weighing hopper 14 _{1 to} 14 ₉ from each loading port 12 _{1 to} 12 ₉ .

As shown in FIG. 11, each weighing hopper 14 _{1 to} 14 ₉ has two discharge gates 14 ₁ a to 14 ₉ a and 14 ₁ b to 14 ₉ b which are double-opened. These two gates 14 ₁ a to 14 ₉ a and 14 ₁ b to 14 ₉ b can be opened and closed independently, and either one of the gates 14 ₁ a to 14 ₉ a (or 14 ₁ b to 14 ₉ b) By opening, the object to be weighed is selectively transferred to one of the memory hoppers 15 ₁ to 15 ₉ (or 16 _{1 to} 16 ₉ ) of the pair of memory hoppers 15 ₁ to 15 ₉ and 16 _{1 to} 16 _9. It is configured so that it can be supplied.

Each memory hoppers 15 _{1-15 9, 161-164 9} has a gate _{15 1 a~15 9 a, 16 1} a~16 9 a pair for discharge opening and closing in conjunction with each other.

In combination weigher 1a of this embodiment, the weighing hoppers 14 ₁ was weighed weight to 14 ₉ objects to be weighed which have been fed to the weighing hoppers 14 ₁ to 14 while the gate 14 ₁ for discharge of the ₉ A～14 ₉ a (or 14 ₁ b~14 ₉ b) by opening a dropping the objects to be weighed to the weighing hopper 14 _{1-14 9} from the empty memory hopper 15 _{1-15 9, 161-164 9.} Furthermore, the combination calculation is performed at the timing of the combination calculation at a constant time interval. In this combination calculation, the weights of the objects to be weighed in the memory hoppers 15 ₁ to 15 ₉ and 16 _{1 to} 16 ₉ are variously combined, and the combined total weight is equal to the target combination weight or the allowable weight closest to the target combination weight locate the combination is within the range, the combination is established, the memory hoppers 15 _{1-15 9,} 16 gates 15 _{1 1-16 9} for discharging _{a~15 9 a, 16 1 a~16 9} a controls the opening and closing of the Then, the objects to be weighed in the memory hoppers 15 ₁ to 15 ₉ and 16 _{1 to} 16 ₉ selected by the combination are discharged to the transport conveyor 4.

In this embodiment, the driving of the conveyor 4 is controlled according to the positions in the transport direction of the memory hoppers 15 ₁ to 15 ₉ and 16 _{1 to} 16 ₉ selected as appropriate combinations by the combination calculation, and the collective gate 45 By controlling the opening and closing, the objects to be weighed discharged from the memory hoppers 15 ₁ to 15 ₉ and 16 _{1 to} 16 ₉ in an appropriate amount combination are packaged within the loading permission period based on the loading request signal from the packaging machine. I put it into the machine. Incidentally, the longitudinal direction of each pair of memory hoppers 15 _{1-15 9, 161-164 9,} conveying of the position in the conveying direction the same, for example, the memory hoppers 16 ₁ of the front side memory hoppers 15 ₁ and the back side of the Since the positions in the direction are the same, each pair of memory hoppers 15 ₁ to 15 ₉ , 16 _{1 to} 16 ₉ is connected to each weighing chamber 11 ₁ a to 11 ₉ a, 11 ₁ b to 11 ₉ b in the above-described embodiment. In this embodiment, it can be considered in the same manner as the above-described embodiment in which _nine weighing hoppers 9 ₁ to 99 are arranged in the transport direction.

Accordingly, in this embodiment as well, in the same manner as in the above-described embodiment, among the memory hoppers 15 ₁ to 15 ₉ and 16 _{1 to} 16 ₉ that are selected as an appropriate combination and discharge the objects to be weighed, the most upstream side in the transport direction When the distance along the conveying direction between the memory hopper and the memory hopper on the most downstream side is equal to or longer than the predetermined length L1, the charging time of the objects to be weighed into the packaging machine 19 is shortened, and the distance along the conveying direction is As in the case where the length is less than the predetermined length L1, the object to be weighed can be charged within the charging permission period of the packaging machine 19.

(Embodiment 3)
FIG. 12 is a schematic plan view of a semi-automatic combination weigher according to still another embodiment of the present invention, FIG. 13 is a front view thereof, FIG. 14 is a side view thereof, and FIG. Parts corresponding to 3 are denoted by the same reference numerals.

As shown in FIG. 12, the top plate 6 of the combination weigher 1b of this embodiment has a plurality of, in this example, a total of two rows in front and back, each having nine rows for the operator to grab and put in the object to be weighed. Eighteen inlets 12 _{1 to} 12 ₁₈ are arranged in a straight line along the left-right direction.

Below the respective inlets 12 _{1 to} 12 ₁₈ , ₁₈ individually corresponding weighing hoppers 17 _{1 to} 17 ₁₈ are arranged in a straight line along the left-right direction. Thus, each weighing hopper 17 _{1-17 18} consists load cell connected individually eighteen weighing sensors 10 ₁ to 10 ₁₈ is stored shown.

Each of the weighing sensors 10 ₁ to 10 ₁₈ measures the weight of an object to be weighed that is put into each of the weighing hoppers 17 _{1 to} 17 ₁₈ from each of the loading ports 12 _{1 to} 12 ₁₈ .

As shown in FIG. 14, each of the weighing hoppers 17 _{1 to} 17 ₁₈ has a pair of discharge gates 17 ₁ a to 17 ₁₈ a that open and close in conjunction with each other.

In the combination scale 1b of this embodiment, the combination calculation is performed at the timing of the combination calculation at a constant time interval. In this combination calculation, the weights of the objects to be weighed in the weighing hoppers 17 _{1 to} 17 ₁₈ are variously combined, and the combined total weight is equal to the target combination weight or within the allowable weight range closest to the target combination weight. find, when combined is established, the weighing hopper 17 _{1-17 18} controls the opening and closing of the gate 17 ₁ A～17 ₁₈ a for discharging the weighing hoppers 17 _{1-17 18} selected in combination, _{161-164 9} objects to be weighed are discharged to the conveyor 4.

In this embodiment, by controlling the driving of the conveyor 4 and controlling the opening and closing of the collecting gate 45 according to the positions in the conveying direction of the weighing hoppers 17 _{1 to} 17 ₁₈ selected as appropriate combinations by the combination calculation. Based on the input request signal from the packaging machine, the objects to be weighed discharged from the weighing hoppers 17 _{1 to} 17 ₁₈ in an appropriate amount combination are input to the packaging machine within the input permission period.

The pair of weighing hoppers 17 _{1 to} 17 ₉ and 17 _{10 to} 17 ₁₈ in the front-rear direction have the same position in the carrying direction. For example, the weighing hopper 17 ₁ on the front side and the weighing hopper 17 ₁₀ on the back side carry. Since the positions in the direction are the same, each of the pair of weighing hoppers 17 _{1 to} 17 ₉ and 17 _{10 to} 17 ₁₈ in the front-rear direction is provided in the weighing chambers 11 ₁ a to 11 ₉ a and 11 ₁ b to 11 in the above-described embodiment. 11 ₉ b respectively, and in this embodiment, it can be considered in the same manner as the above-described embodiment in which _nine weighing hoppers 9 _{1 to} 9 ₉ are arranged in the transport direction.

Accordingly, in this embodiment as well, in the same manner as in the above-described embodiment, among the weighing hoppers 17 _{1 to} 17 ₉ and 17 _{10 to} 17 ₁₈ that are selected as an appropriate combination and discharge the objects to be weighed, the most upstream side in the transport direction When the distance along the conveying direction between the memory hopper and the memory hopper on the most downstream side is equal to or longer than the predetermined length L1, the charging time of the objects to be weighed into the packaging machine 19 is shortened, and the distance along the conveying direction is As in the case where the length is less than the predetermined length L1, the object to be weighed can be charged within the charging permission period of the packaging machine 19.

(Other embodiments)
In the above-described embodiment, the present invention is applied to a semi-automatic combination weigher that manually supplies an object to be weighed. However, the present invention is applied to a fully automatic combination weigher that automatically supplies an object to be weighed. You can also

1, 1a, 1b Combination scale 4 Conveyor 7 Feed hoppers 9 _{1 to} 9 ₉ , 14 _{1 to} 14 ₉ , 17 _{1 to} 17 ₁₈ Weighing hoppers 10 ₁ to 10 ₁₈ Weighing sensors 15 ₁ to 15 ₉ , 16 _{1 to} 16 ₉ Memory hopper 24 CPU unit 19 Packaging machine 45 Collective gate

Claims (4)

A plurality of hoppers arranged in a straight line to hold and discharge the supplied objects to be weighed, and the objects to be weighed discharged from the plurality of hoppers in a conveying direction that is a direction in which the lines are arranged in a line. Based on the calculation result of the transfer means, the transfer means for feeding along the transfer end to the subsequent apparatus from the transfer end, the combination calculation means for performing the combination calculation and selecting the appropriate amount of the hopper, And controlling the discharge of the object to be weighed by the hopper, the control means for controlling the conveyance by the conveying means, and the input path of the object to be weighed from the conveyance end of the conveying means to the subsequent apparatus, A collecting gate capable of holding and discharging the object to be weighed,
The control means controls the driving of the conveying means and the opening / closing of the collecting gate according to the position in the conveying direction of the hopper that is selected as the appropriate amount combination and discharges an object to be weighed. Control the input of objects to be weighed into the device,
A combination weigher characterized by that. The transport means is a transport conveyor disposed below the hopper;
The latter apparatus is a packaging machine,
The control means controls the start of charging and the charging time of an object to be weighed into the packaging machine based on the loading request signal from the packaging machine.
The combination weigher according to claim 1. The control means is configured such that a distance along the transport direction between the most upstream hopper and the most downstream hopper in the transport direction among the hoppers that are selected as the appropriate amount combination and discharges an object to be weighed is a predetermined length. If it is equal to or greater than this, the conveyance conveyor is driven in response to the input request signal to convey the objects to be weighed, and the collection gate is closed to hold the objects to be weighed supplied from the conveyance end of the conveyance conveyor. Then, open the assembly gate and put the objects to be weighed into the packaging machine,
The combination weigher according to claim 2. The control means is configured such that a distance along the transport direction between the most upstream hopper and the most downstream hopper in the transport direction among the hoppers that are selected as the appropriate amount combination and discharges an object to be weighed is a predetermined length. Is less than the above, the conveyance conveyor is driven with a delay from the input request signal to convey the objects to be weighed, while the collection gate is opened in response to the input request signal to start the conveyance conveyor from the conveyance end of the conveyance conveyor. Put the objects to be weighed into the packaging machine,
The combination weigher according to claim 2 or 3.

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