JP5743583B2 - Combination scale - Google Patents

Description

  The present invention relates to a combination weigher that combines and weighs objects to be weighed so as to have a weight within a predetermined weight range.

  A combination weigher, for example, a semi-automatic combination weigher, manually weighs an object into the combination weigher, so that the weight of the unit is relatively large and irregular, or the object to be weighed by a machine, such as chicken, is difficult. It is suitable for handling raw meat such as (broiler) and seafood such as squid and octopus.

  For example, Patent Document 1 discloses a conventional semi-automatic combination weigher.

  FIG. 11 is a plan view of a conventional semi-automatic combination weigher disclosed in Patent Document 1, FIG. 12 is a front view thereof, and FIG. 13 is a side view thereof.

In the combination weigher semiautomatic, operator, and supplies the objects to be weighed several inlet 35 _{1-35 8} each of a plurality of supply hoppers arranged respectively thereunder from 36 ₁ to 36 ₈ manually. Each feed hopper 36 _{1-36 8,} as shown in FIG. 13 has a gate 36 ₁ A～36 ₈ for discharging the casement _a, 36 ₁ b~36 _{8 b,} one of the gates 36 ₁ a to 36 ₈ a (or 36 ₁ b to 36 ₈ b) are opened as indicated by arrows, thereby allowing the objects to be weighed to be separated into the two weighing chambers 37 ₁ a to 37 ₈ a and 37 ₁ b to 37. ₈ and supplies the plurality of metrics is divided into b hopper 37 _{1-37 8} either one of the weighing chambers 37 ₁ a~37 ₈ a (or 37 ₁ b~37 ₈ b).

Each weighing hopper 37 _{1-37 8} are respectively connected to each of the weighing sensor comprising a load cell provided in the main body (not shown), the objects to be weighed of each weighing hopper 37 _1-37 in ₈ by respective weighing sensor The object is weighed. Objects to be weighed are fed hopper 36 _{1-36 8} weighing hopper 37 _{1-37 8} two weighing chambers from _{37 1 a~37 8 a, 37 1} b~37 8 b one weighing chambers 37 ₁ a of ˜37 ₈ a (or 37 ₁ b to 37 ₈ b), so that the weighing chambers 37 ₁ a to 37 ₈ a, 37 ₁ b to The object to be weighed supplied to 37 ₈ b can be weighed.

In this combination weigher, the timing of the combination calculation in the predetermined time interval, the measuring chamber 37 ₁ A～37 ₈ of the weighing hoppers 37 _{1-37 8} weighing with weighing sensors is supplied with the objects to be weighed has been completed a, 37 Various combinations of the weights ₁ b to 37 ₈ b are found, and an appropriate combination in which the total weight is equal to the target combination weight or is within the predetermined weight range closest to the target combination weight is selected from these combinations. Perform the operation. Then, the combination is established, the metering chamber 37 ₁ a~37 ₈ a selected optimal combinations of the objects to be weighed weighed are storage hopper _{37 1 ~37 8, 37 1 b~37} 8 b for discharging the The gate (not shown) is opened, discharged onto the lower transfer conveyor 38, and transferred by the transfer conveyor 38 to a packaging machine (not shown) arranged on the output end side of the transfer conveyor 38. The objects to be weighed are packaged by the packaging machine.

In this manner, the discharge of the objects to be weighed, the weighing chamber _{37 1 a~37 8 a, 37 1} b~37 8 b of the weighing hoppers 37 _{1-37 8} emptied thereabove the objects to be weighed are supplied from one supply hopper 36 _{1-36 8.} As a result, the feed hopper 36 _{1-36 8} becomes empty, the objects to be weighed are fed by hand.

JP 2006-201073 A

  In such a combination weigher of the conventional example, in order to improve the production amount in a certain time (total number of times the combination weigher is put into the packaging machine in a certain time), it is possible to shorten the time interval of the combination operation and increase the weighing processing capacity. Although it is conceivable, if the time interval of the combination calculation is shortened, the objects to be weighed may not be put in time, and the number of hoppers that can participate in the combination calculation may decrease, and the combination accuracy may decrease.

  For example, in a certain cycle, the weighing object is supplied to all hoppers and all the hoppers can participate in the combination calculation, but the combination is established and the weighing objects are discharged from the selected hopper. In the next cycle, among the hoppers that have been emptied by discharging the objects to be weighed, there may be an empty hopper that cannot supply the objects to be weighed in time. The number of hoppers decreases and the combination accuracy decreases.

  Further, in the combination weigher of the conventional example, while the objects to be weighed in the proper combination selected by the previous combination calculation are discharged onto the conveyor and conveyed, the combination of the appropriate combination selected by the next combination calculation is obtained. When the objects to be weighed are discharged onto the conveyor, the distance between the object to be weighed in the proper amount selected by the previous combination calculation and the object to be weighed in the appropriate amount combination selected by the next combination operation is sufficiently large. It will be mixed. For this reason, even if the time interval of the combination calculation is shortened, the object to be weighed in an appropriate amount selected by the previous combination calculation is selected by the next combination calculation while being discharged and transported onto the conveyor. It is not possible to discharge and convey the weighed object in the proper amount combination on the conveyor.

  In this case, it is conceivable to operate the conveyor at high speed and convey it at high speed, but if high-speed conveyance is performed, when an object to be weighed is thrown from the unloading end of the conveyor to a subsequent device such as a packaging machine, The delivery is such that the object to be weighed is released in a parabola and hits the receiving chute of the packaging machine. For this reason, the object to be weighed is damaged and the quality is lowered. In addition, when high-speed conveyance is performed, new problems arise such that the objects to be weighed slip on the conveyor and roll, and noise during operation of the conveyor increases. Therefore, there is a limit to the transfer speed of the transfer conveyor, and it is difficult to perform high-speed transfer.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to improve the weighing processing capability without reducing the combination accuracy.

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

(1) The combination weigher of the present invention has a plurality of hopper groups each having a plurality of hoppers to which the objects to be weighed are supplied, and at least for each hopper group, the weight of the objects to be weighed supplied to the hoppers of the hopper groups. A combination calculation means for performing a combination calculation based on each of the combinations to obtain a set of appropriate amount of hoppers, and objects to be weighed disposed below the hopper groups and discharged downward from the hoppers of the appropriate amount combinations of the hopper groups For each hopper group, a plurality of transport means for transporting each to the same input port of a single packaging machine, and controlling the hopper of each hopper group according to the result of the combination calculation to discharge the objects to be weighed And a control means for controlling the transport of the objects to be weighed by controlling each transport means , wherein the plurality of hopper groups are first and second hopper groups, Multiple hoppers are arranged in a straight line The plurality of transfer means are first and second transfer conveyors corresponding to the first and second hopper groups, respectively. The transfer conveyors have different conveyor lengths and are arranged vertically. The first transport conveyor is longer than the first transport conveyor, and the second transport conveyor is longer in the upstream direction in the transport direction of the objects to be weighed than the first transport conveyor. The control means is disposed below the transport conveyor of the first hopper group selected as the appropriate amount of hopper, and when the hopper weighing object is discharged to the first transport conveyor, the packaging machine In response to a loading request signal from the first conveyor, the workpiece is transported by the first conveyor, and the workpiece is loaded into the packaging machine, while the second hopper group selected as the proper combination Weighing object When the second conveyor conveys the object to be weighed by the second conveyor to a position before being put into the packaging machine, and in response to the loading request signal from the packaging machine, The object to be weighed is transported by the transport conveyor 2 and put into the packaging machine.

  The hopper may be anything that holds and discharges the object to be supplied. For example, the hopper may be a weighing hopper that measures the weight of the object to be measured, or a memory hopper to which the object to be weighed is supplied. It may be. The number of hoppers that each hopper group has is not particularly limited as long as it is plural, and each hopper group is not limited to the same type of hopper but may have different types of hoppers.

An appropriate amount of combination hoppers means a combination of weights in which the combined total weight that combines the weights of the hopper's items to be measured satisfies the set discharge conditions. For example, a combination total that combines the weights of the items to be weighed A combination hopper whose weight is equal to or within a predetermined weight range closest to the target combination weight.

  The combination calculation means only needs to perform combination calculation at least for each hopper group, i.e., perform combination calculation for at least each hopper group. For example, in addition to each hopper group, the combination calculation may be performed for a plurality of hopper groups as a whole. You may go.

According to the combination weigher of the present invention, since a plurality of hopper groups are provided and the combination calculation is performed for each hopper group, the time interval of the combination calculation for each hopper group is shortened compared to the combination weigher composed of a single hopper group. Even if it is not, as a whole combination weigher, the processing capacity of the combination calculation can be increased several times. In addition, since the weighing object discharged from the hoppers of each hopper group according to the result of the combination calculation is provided with a plurality of conveying means for each hopper group to the same input port of the packaging machine , the conveying means Therefore, the processing capacity is not limited.

Therefore, the weighing capacity of the combination weigher can be improved without causing a hopper that cannot participate in the combination calculation and reducing the combination accuracy. In addition, the control means controls the discharge of the objects to be weighed by the hoppers of each hopper group and the conveyance of the objects to be weighed by each conveying means according to the result of the combination calculation, so that the operation for each hopper group is coordinated, An object to be weighed can be conveyed at an appropriate timing with respect to the packaging machine .

According to the present invention , the plurality of hoppers of the first and second hopper groups are arranged in a straight line, and the first and second conveyors having different conveyor lengths are arranged in two upper and lower stages. Therefore, for example, the objects to be weighed in the hoppers of the first hopper group are discharged to the first transport conveyor below, and the objects to be weighed in the hoppers of the second hopper group are transported more than the first transport conveyor. It is possible to discharge to the second lower conveyor, which has a long length. For example, a discharge mechanism similar to the conventional combination weigher that opens the gate of the hopper and drops the object to be measured downward is adopted. Can do.

According to the present invention, in the second conveyor having a long conveyor length, the object to be weighed discharged to the second conveyor is conveyed in advance to a position before being put into the packaging machine, and waits. In response to the input request signal from the packaging machine, the object to be weighed is conveyed to the packaging machine and is input, so that the second conveyor having a long conveyor length is also from the packaging machine in the same manner as the first conveyor. When an input request signal is given, it is possible to immediately transport and input an appropriate amount of objects to be weighed to the packaging machine.

(2) The combination weigher of the present invention has a plurality of hopper groups each having a plurality of hoppers to which the objects to be weighed are supplied, and at least for each hopper group, the weight of the objects to be weighed supplied to the hoppers of the hopper groups. A combination calculation means for performing a combination calculation based on each of the combinations to obtain a set of appropriate amount of hoppers, and objects to be weighed disposed below the hopper groups and discharged downward from the hoppers of the appropriate amount combinations of the hopper groups For each hopper group, a plurality of transport means for transporting each to the same input port of a single packaging machine, and controlling the hopper of each hopper group according to the result of the combination calculation to discharge the objects to be weighed And a control means for controlling the transport of the objects to be weighed by controlling each transport means, wherein the plurality of hopper groups are first and second hopper groups, Multiple hoppers are arranged in a straight line The plurality of transfer means are first and second transfer conveyors corresponding to the first and second hopper groups, respectively. The transfer conveyors have different conveyor lengths and are arranged vertically. And the combination calculation means is an object to be weighed for replacing the one hopper group when the proper combination cannot be obtained by the combination calculation of one of the first and second hopper groups. And at least one of the hoppers of the other hopper group, a combination operation is performed so that the replacement object is included in an appropriate amount combination, and the control means is the replacement object. And the combination operation based on at least the other hopper group of hoppers to obtain an appropriate amount combination including the replacement object to be weighed. While for conveying to the instrumentation unit, when the optimal combination including the objects to be weighed for the replacement can not be obtained, the objects to be weighed for the replacement, the conveying direction to the packaging machine is recovered by the transport in the reverse direction . The configuration (2) may be combined with the configuration of the combination weigher (1).

According to the present invention, when the combination of the objects to be weighed in one hopper group cannot obtain an appropriate amount combination, and the objects to be weighed are replaced, the objects to be weighed for replacement and the objects to be weighed in the other hopper group are Since the combination calculation is performed so that the replacement object to be included is included based on the object, when the appropriate amount combination including the replacement object is obtained by this combination operation, the appropriate combination Transporting the objects to be weighed to the packaging machine and transporting the objects to be weighed for replacement in the direction opposite to the direction of transport to the packaging machine when an appropriate combination including the objects to be weighed for replacement cannot be obtained. Therefore, the frequency of collecting the objects to be replaced is reduced, and the yield is improved.
(3) In a preferred embodiment of the present invention, the control means corresponds to each hopper group with a hopper weighing object of each of the first and second hopper groups selected as the appropriate amount combination by the combination calculation. Each of the first and second transport conveyors discharges the objects to be weighed in the appropriate amount combination, and each of the first and second transport conveyors uses the object to be weighed in the appropriate amount combination as a transport unit. Each of them is transported, and the objects to be weighed are put into the packaging machine alternately or in the order in which the preparations for filling are made first.
According to this embodiment, for each of the first and second hopper groups, an appropriate amount combination of objects to be weighed is discharged to the first and second transport conveyors, and the appropriate amount of combination objects to be weighed by each of the conveyors. Alternatively, it can be loaded into the packaging machine alternately or in the order in which the preparations for loading were made first.

( 4 ) In any one of the above embodiments ( 1 ) to ( 3 ), each of the first and second hopper groups includes a plurality of combination hoppers used for the combination calculation, and the combination hopper Each set may include a weighing hopper for weighing an object to be weighed, and two memory hoppers to which an object to be weighed by the weighing hopper is supplied.

According to this embodiment, the weighing hopper and the two memory hoppers constitute a set of combination hoppers. For example, when the weighing hopper is WB and the two memory hoppers are MB1 and MB2, one set The discharge pattern of the object to be weighed by the combination hopper
(I) Discharge the object to be weighed from one memory hopper MB1 (II) Discharge the object to be weighed from the other memory hopper MB2 (III) Discharge the object to be weighed from both memory hoppers (MB1 + MB2) (IV) Discharge the object to be weighed from one memory hopper (WB + MB1) (V) Discharge the object to be weighed from the weighing hopper and the other memory hopper (WB + MB2) (VI) Discharge the object to be weighed from the weighing hopper and both memory hoppers (WB + MB1 + MB2) (VII) There are seven ways to discharge the object to be weighed.

In contrast, in the conventional combination weigher including a plurality of sets of the supply hopper shown in FIGS. 11 to 13 and the two weighing hoppers WB1 and WB2, a pair of combination hoppers used for the combination calculation is 2 Since it consists of two weighing hoppers WB1 and WB2, the discharge pattern of the object to be weighed is
(I) Discharge the object to be weighed from one weighing hopper WB1 (II) Discharge the object to be weighed from the other weighing hopper WB2 (III) Discharge the object to be weighed from both weighing hoppers (WB1 + WB2) (IV) There are 4 types without discharge.

  Therefore, according to this embodiment, the number of combinations for one of the insertion ports into which the objects to be weighed are charged is nearly doubled compared to the conventional example, and the combination accuracy is improved compared to the conventional example.

According to the present invention, a plurality of hopper groups and a plurality of conveying means corresponding to the respective hopper groups are provided, the combination calculation is performed for each hopper group, and the hopper of each hopper group is discharged according to the result of the combination calculation. Since the objects to be weighed are transported to the same input port of a single packaging machine for each hopper group, there is no hopper that cannot participate in the combination calculation without shortening the time interval of the combination calculation of each hopper group. Thus, the weighing capacity of the combination weigher can be improved without degrading the combination accuracy.

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 schematic front view showing an arrangement example of the combination weigher and the packaging machine of FIG. FIG. 5 is a block diagram showing a control system of the combination weigher of FIG. FIG. 6 is a schematic diagram for explaining the operation of conveying an object to be weighed by the conveyor. FIG. 7 is a schematic diagram for explaining a transport operation of an object to be rejected by the transport conveyor. FIG. 8 is a flowchart for explaining the operation of the combination weigher of FIG. FIG. 9 is a flowchart for explaining the operation of the combination weigher of FIG. FIG. 10 is a flowchart for explaining the operation of the combination weigher of FIG. FIG. 11 is a schematic plan view of a conventional combination weigher. FIG. 12 is a schematic front view of the conventional combination weigher of FIG. FIG. 13 is a schematic side view of the conventional combination weigher of FIG.

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

  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, FIG. 3 is a side view thereof, and FIG. It is a front view which shows the example of arrangement | positioning with a packaging machine.

  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).

  This semi-automatic combination weigher 1 has a main body 2 that performs the combination weighing of the objects to be weighed, and operation control parameters of the combination weigher 1, such as setting and operation of a target combination weight necessary for combination calculation, an allowable upper limit value, etc. An operation setting display unit 3 for displaying the situation is provided.

  This combination weigher 1 is a single package shown in FIG. 4 in which objects to be weighed within a predetermined weight range after combination weighing are arranged on the rear side of the combination weigher 1 (the right side in FIGS. 1, 2 and 4). In this embodiment, two first and second transport conveyors 4 and 5 arranged in two upper and lower stages having different conveyor lengths are used to transport an object to be weighed. I have.

  The lower second conveyor 5 has a conveyor length approximately twice that of the upper first conveyor 4. The conveying conveyors 4 and 5 are aligned at the conveying ends on the downstream side in the conveying direction of the objects to be weighed indicated by arrows A so that the objects to be weighed can be loaded into the loading funnel 26 of the packaging machine 25 shown in FIG. The second conveyor 5 having a long conveyor length extends to the upstream side in the conveying direction (left side in FIGS. 1, 2, and 4) as compared with the first conveyor 4.

The main body 2 of the combination weigher 1 includes a substantially U-shaped base 6 as shown in FIG. A top plate 7 is provided on the top of the base 6. The top plate 7, as shown in FIG. 1, a plurality for two workers to put grabbing the objects to be weighed, in this embodiment ten inlet 8 _{1-8 10,} the central portion The boundary between the _five inlets 8 ₁ to 8 ₅ on the downstream side in the transport direction indicated by the arrow A and the five inlets 8 ₆ to 8 ₁₀ on the upstream side The intervals between the partial inlets 8 ₅ and 8 ₆ are slightly wider. One of the two workers puts an object to be measured into the _five inlets 8 ₁ to 85 on the downstream side in the transport direction, and the other worker Put the object to be weighed into the inlets 8 ₆ to 8 ₁₀ .

Below the input ports 8 ₁ to 8 ₁₀ , 10 weighing hoppers 9 _{1 to} 9 ₁₀ corresponding to each individually are arranged in a straight line, and each of the base 6 is shown in FIG. weighing hoppers 91 _to 93 ₁₀ to 10 pieces consisting of a load cell connected individually weighing sensor 10 ₁ to 10 ₁₀ is stored.

Below each of the ten weighing hoppers 9 _{1 to} 9 _10, a pair of memory hoppers 11 _{1 to} 11 ₁₀ , 12 _{1 to} 12 _{10 to} which the objects to be weighed are supplied from the weighing hoppers 9 _{1 to} 9 ₁₀ , They are arranged in the front-rear direction (the left-right direction in FIG. 3, the up-down direction in FIG. 1). Each pair of memory hoppers 11 _{1 to} 11 ₁₀ , 12 _{1 to} 12 ₁₀ is also arranged in a straight line like the weighing hoppers 9 _{1 to} 9 ₁₀ . These 20 memory hoppers 11 _{1 to} 11 ₁₀ and 12 _{1 to} 12 ₁₀ are supported by the base 6.

Each of the weighing hoppers 9 _{1 to} 9 ₁₀ accommodates and weighs the objects to be weighed introduced from the input ports 8 ₁ to 8 ₁₀ . The base 6 accommodates a control circuit (not shown) which will be described later.

As shown in FIG. 3, each weighing hopper 9 _{1 to} 9 ₁₀ has two discharge gates 9 ₁ a to 9 ₁₀ a and 9 ₁ b to 9 ₁₀ b that are double-opened. These two gates 9 ₁ a to 9 ₁₀ a and 9 ₁ b to 9 ₁₀ b can be opened and closed independently, and either one of the gates 9 ₁ a to 9 ₁₀ a (or 9 ₁ b to 9 ₁₀ b) is opened, and the object to be weighed is placed in one of the memory hoppers 11 _{1 to} 11 ₁₀ (or 12 _{1 to} 12 ₁₀ ) of the pair of memory hoppers 11 _{1 to} 11 ₁₀ and 12 _{1 to} 12 _{10 in} the front-rear direction. It is configured so that it can be selectively supplied.

The memory hoppers 11 _{1 to} 11 ₁₀ and 12 _{1 to} 12 ₁₀ have discharge gates 11 ₁ a, b to 11 ₁₀ a, b; 12 ₁ a, b to 12 ₁₀ a, b that can be opened and closed, respectively. ing.

In the combination weigher 1 of this embodiment, the objects to be weighed are supplied from the _five input ports 8 ₁ to 85 on the downstream side in the transport direction among the ₁₀ input ports 8 ₁ to 8 ₁₀ shown in FIG. A first group G1 as a first hopper group having ₅ weighing hoppers 9 _{1 to} 9 ₅ and 10 memory hoppers 11 _{1 to} 11 ₅ , 12 _{1 to} 12 _5, and ₅ on the upstream side in the conveying direction. a second hopper having a five weighing hoppers 9 _{6-9 10} and 10 memory hoppers 11 _{6-11 10,} 12 _{6-12 10} which the objects to be weighed are supplied from the number of inlet 8 _{1-8 5} The second group G2 as a group is provided, and usually the combination calculation is performed for each of the groups G1 and G2.

Below the memory hoppers 11 _{1 to} 11 ₅ and 12 _{1 to} 12 ₅ of the first group G1 on the downstream side in the transport direction, the first transport conveyor 4 is arranged, and the memory of the second group G2 on the upstream side Below the hoppers 11 _{6 to} 11 ₁₀ and 12 _{6 to} 12 ₁₀ , an upstream portion in the transport direction of the second transport conveyor 5 is disposed.

Therefore, the gates 11 ₁ a to 11 ₅ a and 11 ₁ b to 11 ₅ b for discharging the memory hoppers 11 _{1 to} 11 ₅ and 12 _{1 to} 12 ₅ of the first group G1; 12 ₁ a to 12 ₅ a, 12 _{When 1} b to 12 ₅ b is opened, the object to be weighed is discharged to the first transport conveyor 4 on the upper side, and the object to be weighed can be transported to the packaging machine 25 by the first transport conveyor 4. Further, gates 11 ₆ a to 11 ₁₀ a and 11 ₆ b to 11 ₁₀ b for discharging the memory hoppers 11 _{6 to} 11 ₁₀ and 12 _{6 to} 12 ₁₀ of the second group G2; 12 ₆ a to 12 ₁₀ a, 12 _{When 6} b to 12 ₁₀ b are opened, the objects to be weighed can be discharged to the second transport conveyor 5 on the lower side, and the objects to be weighed can be transported to the packaging machine 25 by the second transport conveyor 5. That is, the objects to be weighed discharged from the memory hoppers 11 _{1 to} 11 ₁₀ and 12 _{1 to} 12 ₁₀ are transported to the packaging machine 25 by the transport conveyors 4 and 5 for each of the groups G1 and G2.

  In this embodiment, as shown in FIG. 4, the combination weigher 1 matches the height at which the objects to be weighed are carried out from the conveyors 4 and 5 with the height of the input funnel 26 of the packaging machine 25 that receives the objects to be weighed. Therefore, it is installed on the gantry 27. The two workers go up the stairs 28 and work on the work table 29. The packaging machine 25 of this embodiment is a bag-feeding type packaging machine that receives the objects to be weighed from the respective conveyors 4 and 5 by the input funnel 26, fills the bags formed in advance, and performs vacuum packing.

  FIG. 5 is a block diagram showing a control system of this embodiment, and parts corresponding to those in FIGS. 1 to 4 are given the same reference numerals.

The combination weigher 1 of this embodiment includes a control circuit 13. The control circuit 13 controls each unit and performs a combination calculation, a CPU unit 14, a control program, and a measurement value. the first group weighing hopper but for opening and closing the memory unit 15 to be stored, the gates 9 ₁ a through 9 ₅ a weighing hoppers 91 _to 93 ₅ of the first group G1, 9 ₁ b~9 ₅ b to independently Gate driving circuit 16 and second group weighing hopper gates for independently opening and closing gates 9 ₆ a to 9 ₁₀ a and 9 ₆ b to 9 ₁₀ b of weighing hoppers 9 _{6 to} 9 ₁₀ of second group G 2 a drive circuit unit 17, the memory hoppers 11 ₁ to 11 _5, 12 ₁ to 12 ₅ of the gate 11 ₁ a of the first group _{G1, b~11 5 a, b;} 12 1 a, b~12 5 a, the b Gate drive times for the first group memory hopper that opens and closes A unit (18), the gate 11 ₆ a of the memory hopper 11 _{6-11 10,} 12 _{6-12 10} of the second group _{G2, b~11 10 a, b;} 12 6 a, to open and close the b~12 ₁₀ a, b A second group memory hopper gate drive circuit unit 19; a first group A / D conversion circuit unit 20 for converting analog signals from the respective weighing sensors 10 ₁ to 10 _{5 of} the first group G1 into digital signals; A second group A / D conversion circuit unit 21 for converting analog signals from the weighing sensors 10 ₆ to ₁₀ 10 in the group G2 into digital signals, and a conveyor drive circuit unit 22 for driving the upper and lower conveyors 4 and 5; And an I / O circuit unit 23 connected to the packaging machine 25.

  Digital signals from the A / D conversion circuit units 20 and 21 of each group are converted into measurement values in the CPU unit 14.

CPU portion 14, the weighing hoppers 91 _to 93 ₁₀ weight of the supplied objects to be weighed to the weighing, the weighing hoppers 91 _to 93 gates 9 ₁ of one for the discharge of ₁₀ A through 9 ₁₀ a (or 9 ₁ b to 9 ₁₀ b) is opened, and the objects to be weighed are dropped from the weighing hoppers 9 _{1 to} 9 ₁₀ to the empty memory hoppers 11 _{1 to} 11 ₁₀ and 12 _{1 to} 12 ₁₀ . The weights of the objects to be weighed dropped on the memory hoppers 11 _{1 to} 11 ₁₀ and 12 _{1 to} 12 ₁₀ are stored in the memory unit 15 by the CPU unit 14.

For example, when the objects to be weighed are weighed by the weighing hoppers 9 _{1 to} 9 ₁₀ shown in FIG. 3 and the gates 9 ₁ b to 9 ₁₀ b on the front side (right side in FIG. 3) are opened to drop the objects to be weighed, Are stored in the memory unit 15 as the weight values of the objects to be weighed in the memory hoppers 12 _{1 to} 12 ₁₀ . Next, when the objects to be weighed are weighed by the weighing hoppers 9 _{1 to} 9 ₁₀ and the gates 9 ₁ a to 9 ₁₀ a on the rear side (left side in FIG. 3) are opened to drop the objects to be weighed, the memory hopper on the rear side The weight values of the objects to be weighed 11 _{1 to} 11 ₁₀ are stored in the memory unit 15.

The CPU unit 14 basically performs the combination calculation for each of the groups G1 and G2 at the timing of the combination calculation at a constant time interval. In this combination calculation, the weighing hoppers 9 _{1 to} 9 ₅ ; 9 _{6 to} 9 ₁₀ and the memory hoppers 11 _{1 to} 11 ₅ , 12 _{1 to} 12 ₅ ; 11 _{6 to} 11 ₁₀ , 12 ₆ to Various combinations of the weights of 12 ₁₀ objects to be weighed are performed, and for each of the groups G1 and G2, an appropriate combination in which the combined total weight is equal to or within the allowable weight range closest to the target combination weight is searched.

Weighing hoppers 9 _{1 to} 9 ₅ ; 9 _{6 to} 9 ₁₀ , and memory hoppers 11 _{1 to} 11 ₅ , 12 _{1 to} 12 ₅ ; 11 _{6 to} 11 ₁₀ , 12 _{6 to} 12 ₁₀ are used for combination calculations. Configure the hopper. This combination hopper is composed of one weighing hopper 9 _{1 to} 9 ₁₀ and two memory hoppers 11 _{1 to} 11 ₁₀ ; 12 _{1 to} 12 ₁₀ for each of the insertion ports 8 ₁ to 8 ₁₀ into which the objects to be weighed are charged. Each is composed.

  A combination is established by the combination calculation for each of the groups G1 and G2, and the objects to be weighed in an appropriate amount combination are transferred to the upper and lower first and second conveyors 4 and 5 corresponding to the groups G1 and G2. Eject and transport each.

In this embodiment, the second transport conveyor 5 on the lower side for transporting the objects to be weighed discharged from the memory hoppers 11 _{6 to} 11 ₁₀ and 12 _{6 to} 12 ₁₀ in the second group G 2 is a memory in the first group G 1. It extends to the upstream side in the transport direction from the upper first transport conveyor 4 that discharges the objects to be weighed discharged from the hoppers 11 _{1 to} 11 ₅ and 12 _{1 to} 12 ₅ , and is a portion extending to the upstream side. Since the objects to be weighed discharged from the memory hoppers 11 _{6 to} 11 ₁₀ and 12 _{6 to} 12 _{10 of} the second group G2 are received and conveyed to the packaging machine 25 on the downstream side in the conveying direction, the first group G1 The transport distance is longer than that of the transport conveyor 4.

  Therefore, in this embodiment, in order to efficiently transport the objects to be weighed to the packaging machine 25 by the second transport conveyor 5 of the second group G2, the following is performed.

FIG. 6 is a schematic diagram for explaining the conveying operation of the objects to be weighed 30 ₁ and 30 ₂ by the first and second conveying conveyors 4 and 5.

In the combination weigher 1 of this embodiment, the upper first transfer conveyor 4 is combined by the combination calculation of the first group G1, and the object to be weighed 30 ₁ in an appropriate amount combination is stored in the memory hoppers 11 ₁ to 11 ₁ . When discharged from 11 ₅ , 12 _{1 to} 12 ₅ , as shown in FIGS. 6 (a) to 6 (c), the process waits until the input request signal is given from the packaging machine 25, and when the input request signal is given, being driven is the articles 30 _first optimal combination is transported to the downstream side is introduced to the packaging machine 25 described above.

On the other hand, the lower second transfer conveyor 5 is different from the upper first transfer conveyor 4 in that the combination is established by the combination calculation of the second group G2, and an object to be weighed in an appropriate combination obtained. When 30 ₂ is discharged from the memory hoppers 11 _{6 to} 11 ₁₀ and 12 _{6 to} 12 ₁₀ as shown in FIG. 6 (a), it is driven even if the input request signal from the packaging machine 25 is not given. As shown in FIG. 6 (b), an appropriate amount of the object to be weighed 30 ₂ is transferred to the downstream side in the conveying direction as indicated by an arrow B, and the position immediately before the object to be weighed 30 ₂ is put into the packaging machine 25. in stops, waits from the packaging machine 25 to put request signal is given, when turned request signal is applied, so as to re-introduced is driven into the packaging machine 25 conveys the objects to be weighed 30 ₂ optimal combinations ing.

Accordingly, the second transport conveyor 5 that receives the objects 30 ₂ discharged from the memory hoppers 11 _{6 to} 11 ₁₀ and 12 _{6 to} 12 ₁₀ of the second group G2 on the upstream side in the transport direction is also the first transport conveyor. 4, the workpiece 30 ₂ is transferred to the position immediately before the packaging machine 25 and waits until a loading request signal is given from the packaging machine 25, and in response to the loading request signal from the packaging machine 25. The sample 30 ₂ is conveyed and put into the packaging machine 25.

  It should be noted that the objects to be weighed into the packaging machine 25 by the first and second transport conveyors 4 and 5 may be alternately put in place, or the positions just before the objects to be weighed into the packaging machine 25 are placed first. May be performed in the order in which preparations for charging into the packaging machine 25 are made first.

  In the combination weigher 1 of this embodiment, as described above, the combination calculation is performed for each of the groups G1 and G2. However, when the combination is not established and there is no appropriate amount of combination, it is difficult to select a preset combination. It is necessary to collect and remove a weighing object under conditions, for example, the weighing object with the heaviest weight, as a weighing object for rejection, which is a weighing object for replacement, and replace it with a new weighing object. If the frequency of collection and removal of such objects to be rejected increases, productivity decreases and yield deteriorates.

  Therefore, in this embodiment, when the combination is not established in the combination calculation of the first group G1, and an appropriate amount combination cannot be obtained, for example, the weighing object having the heaviest weight is set as the weighing object for rejection, The combination calculation is performed with the objects to be weighed in the second group G2 so as to include the objects to be weighed for rejection.

  FIG. 7 is a schematic diagram for explaining the operation when this combination calculation is performed.

If the combination is not established in the combination calculation of the first group G1 and an appropriate amount combination cannot be obtained, for example, the object to be weighed 30 _1R for rejecting and replacing the object to be weighed with the heaviest weight is illustrated. As shown in FIG. 7 (b), it is discharged to the first conveyor 4 and combined with the objects to be weighed in the second group G2 so as to always include the object 30 _1R for rejection.

If an appropriate amount combination cannot be obtained by this combination calculation, the first transport conveyor 4 is driven in reverse to transport in the direction opposite to the normal transport direction indicated by the arrow C as shown in FIG. Then, it is dropped onto the second conveyor 5 and this second conveyor 5 is also driven in the reverse direction and conveyed in the reverse direction indicated by the arrow D, and the object 30 _1R for rejection is recovered in a recovery box (not shown). To do.

When an appropriate amount combination including the object to be weighed 30 _1R is obtained by the above combination calculation, the first transport conveyor 4 is reversely driven and indicated by an arrow E as shown in FIG. is transported in the opposite direction together with dropping the objects to be weighed 30 _1R for rejection to the second conveyor 5, the objects to be weighed 30 ₂ of the second group G2 selected in the optimal combination in the second transfer conveyor 5 As shown by the arrow F, the object to be weighed 30 ₂ including the object to be weighed 30 _1R to be discharged is conveyed to the packaging machine 25 and put into the packaging machine 25. In addition, the object to be weighed 30 _1R for rejection is transported in the reverse direction by the first transport conveyor 4 and dropped to the second transport conveyor 5, but transported to the packaging machine 25 side by the first transport conveyor 4. Then, it may be put into the packaging machine 25 together with the second group of objects 30 ₂ conveyed by the second conveyor 5.

In this embodiment, when the combination calculation is not established in the first group G1, the object to be weighed in the second group G2 is included so as to include the object to be weighed 30 _1R in the first group G1. Although the combination calculation is performed, as another embodiment, in addition, when the combination calculation is not established in the second group G2, the first group is included so as to include the object to be rejected in the second group G2. You may make it perform a combination calculation with the to-be-measured object of group G1.

  In addition, in order to include an object to be rejected, a combination operation is not performed on the object to be weighed in either one of the first group G1 and the second group G1 (G2), but the object to be rejected is not performed. You may make it perform a combination calculation with the to-be-measured object of the both groups of the 1st and 2nd groups G1 and G2 so that a measurement object may be included.

  8 to 10 are flowcharts showing the control processing of this embodiment.

As shown in FIG. 8, first, the weighing control of the first group G1 is performed (step S1). In this weighing control, the objects to be weighed placed in the weighing hoppers 9 _{1 to} 9 ₅ of the first group G1 are weighed, and the discharge gates 9 ₁ a to 9 ₅ a and 9 ₁ b to 9 ₅ b are controlled. Then, the objects to be weighed are supplied to the memory hoppers 11 _{1 to} 11 ₅ and 12 _{1 to} 12 ₅ of the first group G1 in which the objects to be weighed are not supplied.

Next, the weighing control of the second group G2 is performed to measure the objects to be weighed in the weighing hoppers 9 _{6 to} 9 ₁₀ of the second group G2, and the discharge gates 9 ₆ a to 9 ₁₀ a, 9 ₆ The objects to be weighed are supplied to the memory hoppers 11 _{6 to} 11 ₁₀ and 12 _{6 to} 12 ₁₀ of the second group G2 in which the objects to be weighed are not supplied by controlling b to 9 ₁₀ b (step S2).

Next, an object to be weighed for rejection, which is an object to be weighed for replacement, which is conveyed to the upper first conveyor 4 corresponding to the first group G1 in the direction opposite to the packaging machine 25 side and collected and removed. It is determined whether or not the object to be rejected is discharged from the memory hoppers 11 _{1 to} 11 ₅ and 12 _{1 to} 12 _{5 of} the first group G1 (step S3). When there are no objects to be weighed, it is determined whether or not there is an object to be weighed in an appropriate amount combination that has been discharged by combination calculation on the upper first conveyor 4 corresponding to the first group G1 ( Step S4) When there is no object to be weighed, the combination calculation is performed for the first group G1 (Step S5). In the combination calculation for the first group G1, the weights of the weighing hoppers 9 _{1 to} 9 _{5 of} the first group G1 and the objects to be weighed of the memory hoppers 11 _{1 to} 11 ₅ and 12 _{1 to} 12 ₅ are variously combined. An appropriate amount combination in which the combined total weight is equal to the target combination weight or is within a predetermined weight range closest to the target combination weight is searched for.

  Next, it is determined whether or not the combination has been established by the combination calculation for the first group G1, that is, whether or not there is an appropriate amount of combination (step S6). When the combination is not established and there is no appropriate amount of combination, the hopper reject control of the first group G1 is performed (step S23). In this rejection control, the gate of a memory hopper that stores a predetermined object to be weighed that is difficult to be selected for combination, for example, the object to be weighed with the largest weight, is opened to the first group G1. Rejected weighing object flag indicating that there is a weighing object for rejection on the upper first conveying conveyor 4 and that there is a weighing object for rejection on the upper first conveying conveyor 4 Is turned on and the process proceeds to step S9 in FIG. 9 (step S24).

  In step S6 of FIG. 8, when the combination of the first group G1 is established, that is, when there is an appropriate amount combination, the hopper control of the first group G1 is performed, the hopper gate of the appropriate amount combination is opened, and the first group The objects to be weighed are discharged to the upper first conveyor 4 corresponding to G1 (step S7), and the objects to be weighed that indicate that there is an appropriate combination of objects to be weighed in the upper first conveyor 4 exist. The weighing object flag is turned on, and the process proceeds to step S9 shown in FIG. 9 (step S8).

In step S9 shown in FIG. 9, it is determined whether or not there is a proper combination of objects to be weighed discharged after the combination is established in the lower second conveyor 5 corresponding to the second group G2. When there is no object to be weighed, the combination calculation is performed for the second group G2 (step S10). In the combination calculation for the second group G2, the weights of the weighing hoppers 9 _{6 to} 9 _{10 of} the second group G2 and the objects to be weighed of the memory hoppers 11 _{6 to} 11 ₁₀ and 12 _{6 to} 12 ₁₀ are variously combined. An appropriate amount combination in which the combined total weight is equal to the target combination weight or is within a predetermined weight range closest to the target combination weight is searched for.

  Next, it is determined whether or not the combination calculation is established for the second group G2, that is, whether or not there is an appropriate amount combination (step S11). When the combination is not established and there is no appropriate amount of combination, the hopper of the second group G2 is rejected, and the weighing hopper that is difficult to be selected for the combination, for example, the weighing object having the heaviest weight is stored. Is opened and discharged to the lower second conveyor 5 corresponding to the second group G2 as an object to be rejected (step S27), and to the upper first conveyor 4 to be weighed for rejection. It is determined whether there is an object (step S28).

  In step S28, when there is an object to be rejected on the upper first transport conveyor 4, the upper first transport conveyor 4 is transported in the direction opposite to the packaging machine 25 and the lower second transport conveyor 4 is transported. The reject object to be weighed is dropped on the transport conveyor 5 (step S29), and the reject weigh object flag indicating that there is a reject object to be measured on the upper first transport conveyor 4 is turned off. (Step S30), the lower second conveyor 5 is conveyed in the direction opposite to the packaging machine 25 and the object to be rejected is collected in the collection box (Step S31).

  In step S11, when the combination for the second group G2 is established, that is, when there is an appropriate amount combination, the hopper control of the second group G2 is performed, and the hopper gate of the appropriate amount combination is opened to enter the second group G2. The object to be weighed is discharged to the corresponding lower second conveyor 5 (step S12), and the object to be weighed discharged by carrying out the conveyance control of the lower second conveyor 5 is immediately before the packaging machine 25. 10 is turned on and a standby flag is turned on to indicate that there is an object to be weighed in the lower second conveyor 5 (step S13). The process proceeds to step S15 (step S14).

  Referring to FIG. 8 again, in step S3 described above, when there is an object to be rejected on the upper first conveyor 4 corresponding to the first group G1, the lower side corresponding to the second group G2 is set. It is determined whether or not there is an appropriate amount of objects to be weighed discharged after the combination is established on the second conveyor 5 (step S25), and an appropriate amount of objects to be weighed on the lower second conveyor 5 is determined. If there is not, the combination calculation is performed for the weighing hopper and the memory hopper of the second group G2 that have been weighed so as to always include the object to be rejected of the upper first transfer conveyor 4 (step S26). Next, the process proceeds to step S32 shown in FIG. 9, and it is determined whether or not a combination has been established, that is, whether or not there is an appropriate amount combination including the object to be weighed for rejection.

  In step S32, when the combination is not established and there is no appropriate amount combination, the upper first transport conveyor 4 is transported in the opposite direction to the packaging machine 25 and is placed on the lower second transport conveyor 5. The object to be weighed for dropping is dropped (step S33), and the object to be weighed for rejection indicating that the object to be weighed for rejection exists on the upper first conveyor 4 is turned off (step S34). The lower second conveyor 5 is conveyed in the opposite direction to the packaging machine 25, and the object to be weighed for collection is collected in a collection box (not shown) (step S35).

  In step S32, when the combination is established, that is, when there is an appropriate amount combination, the hopper control of the second group G2 is performed, and the gate of the appropriate amount combination hopper is opened, and the objects to be weighed are transferred to the second conveyor 5. Ejecting (step S36), the first transport conveyor 4 on the upper side is transported in the opposite direction to the packaging machine 25, and the object to be weighed is dropped on the second transport conveyor 5 on the lower side (step S37). Then, the transport control of the lower second transport conveyor 5 is performed to transport the object to be measured to the downstream side immediately before the packaging machine 25 (step S38), and the lower second transport conveyor 5 is combined with the lower second transport conveyor 5. The weighing object presence flag indicating that there is a weighing object of an appropriate amount combination that satisfies is turned on, and the process proceeds to step S15 shown in FIG. 10 (step S39).

  In step S15 shown in FIG. 10, it is determined whether or not an input request signal is given from the packaging machine 25, and when the input request signal is given, it is combined with the first transport conveyor 4 on the upper side of the first group G1. It is determined whether or not the weighing object presence flag indicating that there is a weighing object for which there is established (step S16), and when the flag is on, the second lower group G2 It is determined whether or not the weighed object flag indicating that there is a proper combination of objects to be weighed in the transport conveyor 5 is turned on (step S17).

  In this step S17, when the flag is turned on, whether or not the loading completion flag indicating completion of loading of the objects to be weighed in the first transport conveyor 4 on the upper side of the first group G1 into the packaging machine 25 is turned on. (Step S18), if not turned on, the loading completion flag of the first group G1 is turned on (Step S19), the conveyance control of the first conveyance conveyor 4 on the upper side of the first group G1 is performed, The first transfer conveyor 4 is driven to transfer the objects to be weighed to the packaging machine 25 (step S20), and there is an appropriate combination of objects to be weighed in the upper first transfer conveyor 4. The weighing object flag indicating that the measurement is to be performed is turned off (step S21), an insertion completion signal is transmitted to the packaging machine 25, and the process returns to step S1 in FIG. 8 (step S22).

  In step S16, when the weighed object flag indicating that there is a proper combination of objects to be weighed in the first transport conveyor 4 above the first group G1 is not on, the second group It is determined whether or not the weighed object flag indicating that there is an object to be weighed in the second transfer conveyor 5 below G2 is turned on (step S40).

  In this step S40, when the flag is on, the charging completion flag indicating the completion of the charging of the objects to be weighed from the first transport conveyor 4 on the upper side of the first group G1 to the packaging machine 25 is turned off (step S41). ), The transport control of the second transport conveyor 5 on the lower side of the second group G2 is performed, the second transport conveyor 5 is driven, and the objects to be weighed are transported and put into the packaging machine 25 (step S42). Then, the weighing object presence flag indicating that there is an weighing object having an appropriate combination in the combination on the lower second conveyor 5 is turned off (step S43), and the process proceeds to step S22.

  In step S40, when the weighed object flag indicating that there is a proper combination of objects to be weighed in the second transport conveyor 5 below the second group G2 is not turned on, FIG. Return to step S1.

  In Step S18, when the loading completion flag indicating completion of loading of the objects to be weighed in the first conveyor 4 on the upper side of the first group G1 into the packaging machine 25 is on, the process proceeds to Step S41.

As described above, a combination calculation is performed for each of the two groups G1 and G2 each having a plurality of combination hoppers, and an appropriate amount combination is measured for each group by the first and second conveyors 4 and 5. Since the items are respectively transported and put into the packaging machine 25, the entire combination weigher can be obtained without shortening the time interval of the combination calculation for each of the groups G1 and G2 compared to the combination weigher composed of a single group. The processing capacity of the combination calculation can be increased by a factor of two. Moreover, since the first and second transport conveyors 4 and 5 are transported to the groups G1 and G2, respectively, the processing capacity is not limited by the transport capacity.

Further, the inlets 8 ₁ to 8 ₁₀ and the hoppers 9 _{1 to} 9 ₁₀ , 11 _{1 to} 11 ₁₀ , and 12 _{1 to} 12 ₁₀ of the grooves G1 and G2 are arranged in a straight line, and the first and the first having different lengths are arranged. Since the second conveyors 4 and 5 are arranged in two stages above and below the hopper, the installation space is also relatively small, and the discharge of the objects to be weighed by the hoppers of the groups G1 and G2 is the same as in the past. It is only necessary to open the gate and drop and discharge downward, resulting in a simple discharge structure.

  Further, in this embodiment, the combination hopper used for the combination calculation of each group G1, G2 is composed of one weighing hopper WB and two memory hoppers MB for one input port of the object to be weighed. It is configured.

In such a hopper configuration, the discharge pattern of the object to be weighed by the combination hopper corresponding to one input port of the object to be weighed is
(I) Discharge the object to be weighed from one memory hopper MB1 (II) Discharge the object to be weighed from the other memory hopper MB2 (III) Discharge the object to be weighed from both memory hoppers (MB1 + MB2) (IV) Discharge the object to be weighed from one memory hopper (WB + MB1) (V) Discharge the object to be weighed from the weighing hopper and the other memory hopper (WB + MB2) (VI) Discharge the object to be weighed from the weighing hopper and both memory hoppers (WB + MB1 + MB2) (VII) There are 7 ways to discharge the object to be weighed.

  On the other hand, the conventional example shown in FIGS. 11 to 13 includes the supply hopper and the two weighing hoppers WB1 and WB2. Therefore, the combination hopper used for the combination calculation is the object to be weighed. Are formed by two weighing hoppers WB1 and WB2.

In such a conventional hopper configuration, the discharge pattern of the object to be weighed by the combination hopper corresponding to one input port of the object to be weighed is
(I) Discharge the object to be weighed from one weighing hopper WB1 (II) Discharge the object to be weighed from the other weighing hopper WB2 (III) Discharge the object to be weighed from both weighing hoppers (WB1 + WB2) (IV) There are 4 types of no discharge.

In this embodiment, each group has five inlets, so the number of combinations is 7 ⁵ −1 = 16,806 combinations.

On the other hand, in the conventional hopper configuration, for example, if there are ^seven inlets, the number of combinations is 4 ⁷ −1 = 16,383.

  That is, each of the groups G1 and G2 having five inlets in this embodiment corresponds to one conventional combination weigher having seven inlets. In this embodiment, two groups Since G1 and G2 are provided, the processing speed is similar to that of connecting two conventional combination weighers having seven inlets, that is, the conventional combination weigher having seven inlets. A double processing speed can be obtained.

(Other embodiments)
In the above-described embodiment, the supply hopper is not provided, but the present invention can be similarly applied to a configuration including a supply hopper and a weighing hopper and other hopper configurations.

  In the above-described embodiment, the present invention is applied to a semi-automatic combination weigher in which an operator puts an object to be weighed, but the present invention can also be applied to a combination weigher to which an object to be weighed is automatically supplied. .

1 Combination Weighers 4 and 5 First and Second Conveyors 8 ₁ to 8 ₁₀ Input Ports 9 _{1 to} 9 ₁₀ Weighing Hoppers 10 ₁ to 10 ₁₀ Weighing Sensors 11 _{1 to} 11 ₁₀ , 12 _{1 to} 12 ₁₀ Memory Hopper 13 Control Circuit 25 Packaging machine

Claims (4)

A plurality of hopper groups each having a plurality of hoppers to which the objects to be weighed are supplied;
Combination calculation means for performing a combination calculation based on the weight of the objects to be weighed supplied to the hoppers of the hopper group at least for each hopper group to obtain a set of appropriate amount of hoppers;
A plurality of objects to be weighed that are disposed below each hopper group and discharged downward from the hopper of the appropriate amount combination of each hopper group are conveyed to the same input port of a single packaging machine for each hopper group. Conveying means,
According to the result of the combination calculation, the hopper of each hopper group is controlled to control the discharge of the objects to be weighed, and the control means for controlling the transport of the objects to be weighed by controlling each transport means ,
The plurality of hopper groups are first and second hopper groups, and the plurality of hopper groups of each hopper group are arranged in a straight line,
The plurality of transfer means are first and second transfer conveyors corresponding to the first and second hopper groups, respectively. The transfer conveyors have different conveyor lengths and are arranged vertically. Established,
The first transport conveyor has a length that is longer than that of the first transport conveyor, so that the upstream side in the transport direction of the object to be weighed is longer than the first transport conveyor. Arranged below,
The control means is configured to respond to an input request signal from the packaging machine when the objects to be weighed in the first hopper group selected as the appropriate amount combination are discharged to the first conveyor. While the objects to be weighed are conveyed by the first conveyor and the objects to be weighed are put into the packaging machine,
When the objects to be weighed in the second hopper group selected as the appropriate amount combination are discharged to the second transport conveyor, the objects to be weighed by the second transport conveyor before being put into the packaging machine. Transport to the position, in response to the input request signal from the packaging machine, transport the object to be weighed by the second transport conveyor, and put into the packaging machine,
A combination weigher characterized by that. A plurality of hopper groups each having a plurality of hoppers to which the objects to be weighed are supplied;
Combination calculation means for performing a combination calculation based on the weight of the objects to be weighed supplied to the hoppers of the hopper group at least for each hopper group to obtain a set of appropriate amount of hoppers;
A plurality of objects to be weighed that are disposed below each hopper group and discharged downward from the hopper of the appropriate amount combination of each hopper group are conveyed to the same input port of a single packaging machine for each hopper group. Conveying means,
According to the result of the combination calculation, the hopper of each hopper group is controlled to control the discharge of the objects to be weighed, and the control means for controlling the transport of the objects to be weighed by controlling each transport means,
The plurality of hopper groups are first and second hopper groups, and the plurality of hopper groups of each hopper group are arranged in a straight line,
The plurality of transfer means are first and second transfer conveyors corresponding to the first and second hopper groups, respectively. The transfer conveyors have different conveyor lengths and are arranged vertically. Established,
The combination calculation means, when the proper combination cannot be obtained by the combination calculation of one of the first and second hopper groups, and at least an object to be weighed for replacing the one hopper group, Based on the hopper to be weighed in the other hopper group, a combination operation is performed so that the weighing object for replacement is included in an appropriate amount combination,
The control means, when an appropriate amount combination including the replacement weighing object is obtained by the combination calculation based on the replacement weighing object and at least the other hopper group hopper weighing object, While the proper amount combination of the objects to be weighed is transported to the packaging machine, when the proper amount combination including the replacement object to be weighed is not obtained, the replacement object to be weighed is transported to the packaging machine. To be collected in the opposite direction,
A combination weigher characterized by that . The control means sends the hopper weighing objects of the first and second hopper groups selected as the appropriate amount combination by the combination calculation to the first and second transport conveyors corresponding to the hopper groups, respectively. On the other hand, the discharged objects to be weighed in an appropriate amount are transported by the first and second transport conveyors using the object to be weighed in an appropriate amount combination as a transport unit, alternately or first. Put the objects to be weighed into the packaging machine in the order in which they are ready
The combination weigher according to claim 1 or 2. Each of the first and second hopper groups includes a plurality of combination hoppers used for the combination calculation, and each set of the combination hoppers weighs a weighing hopper for weighing an object to be weighed and the weighing hopper. Each having two memory hoppers supplied with the measured objects
The combination weigher according to any one of claims 1 to 3 .

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