JPH1123354A - Combined metering apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a combined metering apparatus in which different kinds of objects to be metered are not mixed in a collecting position. SOLUTION: When a plurality of group codes are set arbitrarily by a group setting means 40 with reference to respective metering and discharge lines on a collecting conveyor, a discharge-timing decision means 49 decides the discharge timing of the respective metering and discharged lines on the basis of distances up to the respective metering and discharge lines from a collecting position in such a way that objects, to be metered, discharged from the metering and discharge lines at which the same group codes are set reach the collecting position nearly at the same timing and that objects, to be metered, discharged from the metering and discharge line at which the different group codes are set reach the collecting position at prescribed intervals. In addition, a combination selection means 42 selects the combination of respective groups on the basis of metering signals by metering devices 26 in the respective metering and discharge lines. The objects, to be metered, which are selected in the respective group codes are discharged onto the collecting conveyor according to the discharge timing decided by the discharge-timing decision means 49.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combination weighing apparatus for selecting a combination of objects to be weighed by a plurality of weighing and discharging lines and collecting the selected objects at a predetermined collecting position by a collecting conveyor. The present invention relates to a technique for preventing mixing of types of objects to be weighed discharged from a weighing discharge line and entanglement between objects to be weighed.

[0002]

2. Description of the Related Art A plurality of weighing / discharging lines, from among weighing objects weighed by a weighing section, a weighing object whose combination weight is within a target range is selected and discharged from the weighing / discharging line. In a combination weighing apparatus that weighs objects with strong adhesiveness, the weighing objects discharged from the weighing / discharging line are often collected by a collecting conveyor. The transfer time is shortened by using a plurality of pieces to prevent a decrease in efficiency.

In the combination weighing apparatus in which the objects to be weighed are collected by a plurality of collecting conveyors as described above, the objects to be weighed selected in the combination are simultaneously discharged onto a collecting conveyor and collected at a collecting position, or The objects to be weighed are discharged onto the collecting conveyor in order from a position farthest from the collecting position, and the objects to be weighed are conveyed while being collected on the collecting conveyor.

[0004]

However, in the conventional combination weighing apparatus as described above, when weighing an elongated object to be weighed such as a boiled kelp, for example, the objects to be weighed are placed at the unloading position of each collecting conveyor. There was a problem that they hit each other and got entangled.

[0005] Further, in the conventional combination weighing device described above,
If multiple weighing / discharge lines are divided into groups and objects of different types are weighed and assembled, the different types will be mixed together at the unloading position of each assembly conveyor, and will be mixed in the packaging container or packaging bag at the collecting position. There was a problem that it was not possible to make a state for each variety.

[0006] An object of the present invention is to provide a combination weighing device that solves this problem.

[0007]

According to a first aspect of the present invention, there is provided a combination weighing apparatus, comprising: an assembly conveyor for unloading articles to a predetermined assembly position; A plurality of weighing discharge lines capable of weighing the supplied weighing object and discharging the weighing object to the collecting conveyor, and weighing the weighing object selected from the weighing objects weighed in each of the weighing discharge lines. In a combination weighing device that discharges to the collecting conveyor and collects at the collecting position, a group setting unit configured to arbitrarily set a plurality of group codes for each of the measuring and discharging lines, and from the collecting position of each of the measuring and discharging lines. Weighing objects discharged from the weighing / discharging lines with the same group code set are almost the same based on the distance between the weighing / discharging lines and the group code set for each weighing / discharging line. At the timing, gather at the gathering position, and each of the objects to be weighed discharged from the weighing and discharging lines in which different group codes are set reach the gathering position at predetermined intervals such that they are not mixed with each other. Discharge timing determining means for determining the discharge timing of the weighing discharge line, combination selecting means for selecting a combination of the objects to be weighed on the weighing discharge line in which the same group code is set, and the combination selecting means The weighing object selected for each group code is
Discharge control means for discharging from the weighing discharge line onto the collecting conveyor in accordance with the discharge timing determined by the discharge timing determining means.

According to a second aspect of the present invention, there is provided a combination weighing apparatus, comprising: a collecting conveyor for unloading articles to a predetermined collecting position;
A plurality of weighing / discharging lines arranged above the collecting conveyor and capable of weighing the supplied weighing object and discharging the weighing object to the collecting conveyor are provided. In a combination weighing apparatus that discharges objects to be weighed selected from among them to the collecting conveyor and collects them at the collecting position, a plurality of group codes indicating a collecting order to the collecting position for each of the weighing and discharging lines are arbitrarily set. Based on the group setting means to be set, and the distance from the gathering position of each of the weighing and discharging lines and the group code set for each of the weighing and discharging lines, the weighing and discharging lines are discharged from the weighing and discharging line in which the same group code is set. Objects to be weighed gather at the gathering position at substantially the same timing, and are discharged from the weighing discharge line in which different group codes are set. Discharging timing determining means for determining the discharging timing of each weighing discharge line so that the weighed objects reach the collecting position at predetermined intervals that do not mix with each other according to the grouping order indicated by the group code; Combination selecting means for selecting a combination of objects to be weighed on a weighing / discharging line in which a code is set; and an object for weighing selected for each group code by the combination selecting means; Discharge control means for discharging from the weighing discharge line onto the collecting conveyor in accordance with the discharge timing determined by the above.

According to a third aspect of the present invention, there is provided a combination weighing apparatus, comprising: a plurality of collecting conveyors for unloading articles to a predetermined collecting position; and weighing of the supplied objects arranged above the respective collecting conveyors. And a plurality of weighing / discharging lines capable of being discharged to the collecting conveyor, wherein a combination of the weighed objects weighed in each of the weighing / discharging lines is selected based on the weighing result, and the selected weighed objects are In a combination weighing device that discharges to the collecting conveyor and collects at the predetermined position,
The discharge timing of the weighing / discharging line is controlled so that all the objects to be weighed selected in the combination are gathered at the gathering position in order from the closest to the gathering position at intervals that do not mix with each other until they reach the gathering position. Discharge control means is provided.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a schematic mechanism of a combination weighing apparatus according to an embodiment, which is capable of mixing and weighing many kinds including articles having strong adhesiveness.

In FIG. 1, a plurality of (in the figure, ten) feeders 21 arranged in a horizontal line each receive an object to be weighed and supply it to a pool hopper 22 arranged below.

Each pool hopper 22 is composed of a cylindrical body (cylindrical body or square cylindrical body) 22a having an open top and bottom, and a flat shutter 22b for opening and closing the lower surface of the cylindrical body 22a. Each of the shutters 22b is slid back and forth by a driving device (for example, an air cylinder) not shown, and
Open and close the lower surface of a.

Below each pool hopper 22, a weighing hopper 24 is arranged. The weighing hopper 24 is composed of a cylindrical body 24a having an open top and bottom and a flat shutter 24b for opening and closing the lower surface of the cylindrical body 24a, like the pool hopper 22, and each shutter 24b is slid back and forth by a driving device (not shown). The lower surface of the cylinder 24a is opened and closed. The weighing hopper 24 is supported by a weighing device 26 together with a driving device. Each weighing device 26 outputs a weighing signal corresponding to the total weight of the weighing hopper 24, the driving device, and the objects to be weighed in the weighing hopper 24.

Below each weighing hopper 24, a timing hopper 27 is disposed. The timing hopper 27 includes a cylindrical body 27a having an open top and bottom like the pool hopper 22, and a flat shutter 27b for opening and closing the lower surface of the cylindrical body 27a. Each shutter 27b is slid back and forth by a driving device (not shown). And the cylindrical body 27a
Open and close the lower surface of.

As described above, since the pool hopper 22, the weighing hopper 24 and the timing hopper 27 open and close the lower surface of the cylindrical body having a substantially vertical inner wall with a sliding shutter, the adhesive weighing object can be removed. Extremely low residual adhesion.

Below the timing hopper 27, a pair of left and right collecting conveyors 30, 31 having the same transport speed are provided. The left collecting conveyor 30 conveys the objects to be weighed discharged from the five left timing hoppers 27 to the right, and the right collecting conveyor 31 transfers the weighed objects discharged from the five right timing hoppers 27. It is conveyed to the left and falls down and discharged from the gap between the two conveyers 30, 31.

A guide chute 32 is disposed below the gap between the collecting conveyors 30 and 31, and a tray transport device 33 is disposed below the guide chute 32.

The tray conveying device 33 includes the guide chute 3
Tray 34 for storing objects to be weighed discharged from 2
To a packaging line (not shown).

FIG. 2 is a block diagram showing a circuit configuration of the combination weighing device. In FIG. 2, the group setting unit 40 includes a pool hopper 22 and a weighing hopper 2
4 and the timing hopper 27 as one weighing / discharging line, for setting 10 weighing / discharging lines into, for example, three groups at the maximum. A, B, C
Can be assigned by operating a key (not shown). Here, each group code designates a combination operation group in which a combination operation is performed in the weighing discharge line to which the group code is assigned, and the tray 34 of the object to be weighed selected by the combination operation for each group. This is a code for specifying the order of accommodation in

For example, ten measuring and discharging lines are connected to the left 5
Lines and five lines on the right side are divided into two groups, and the objects to be weighed, which are selected in combination on the weighing discharge lines L1 to L5 on the left side,
When it is desired that the objects to be weighed are stored in the tray 34 before the objects selected and combined in the right weighing and discharging lines L6 to L10, as shown in FIG.
Group code A is set to L5, and group code B is set to the five right discharge lines L6 to L10.

In this case, it is assumed that the group consisting of a plurality of weighing and discharging lines is continuous, and it is possible to set such that no grouping is performed. It is also possible to set a target range for each group.

The weight calculating means 41 receives a weighing signal from each weighing device 26, and outputs a weighing signal when the weighing object is not stored in the weighing hopper and a weighing signal after the weighing object is stored in the weighing hopper. , The weight of the object stored in each weighing hopper 24 is obtained, and this is output to the combination selecting means 42.

The combination selecting means 42, for example, every time a combination request signal output from the tray conveying device 33 at a predetermined cycle is received, calculates the combination of the weights of the objects to be weighed obtained by the weight calculating means 41 in a group setting. This is performed for each group set in advance in the means 40, a combination of objects to be weighed is selected for which the combination weight is within the target range for each group, and a weighing hopper containing the objects to be weighed included in the selected combination. Is output to the weighing hopper opening / closing control means 44.

For example, as shown in FIG. 3, when the weighing and discharging lines are divided into two groups of five lines on the left side and five lines on the right side, the weighing target weighed by the five weighing hoppers 24 on the left side. A combination whose combination weight is within a target weight range preset for Group A is selected from the objects, and the combination weight is assigned to Group B from the objects weighed by the five weighing hoppers 24 on the right side. On the other hand, a combination that has a preset target weight range within the group is selected.

Here, the combination of the other group is selected based on the weight obtained by subtracting the total weight of the objects selected and combined in one group from the target weight range of the entire product. Is also good. If there is no group designation, a combination whose combination weight is within the overall target range is selected from all combinations of the objects weighed by the weighing hopper 24.

The weighing hopper opening / closing control means 44 receives the combination selection signal output from the combination selection means 42, and simultaneously opens and closes the shutters 24b of the weighing hopper 24 specified by the selection signal, thereby controlling the weighing hopper inside the weighing hopper. The objects to be weighed are stored in the corresponding timing hoppers 27, respectively.

The pool hopper opening / closing control means 45 includes a shutter 22b of the pool hopper 22 corresponding to the weighing hopper from which the objects to be weighed have been discharged by the weighing hopper opening / closing control means 44.
Open and close to supply a new weighing object to the weighing hopper,
The feeder driving means 46 includes a pool hopper opening / closing control means 4.
By driving the feeder 21 corresponding to the pool hopper 22 from which the objects to be weighed have been discharged by 5 for a predetermined time, a new object to be weighed is supplied to the pool hopper 22.

On the other hand, the timing hopper opening / closing controller 47
Is based on the group information set by the group setting means 40, the objects to be weighed in the same group are stored in the tray 34 at substantially the same timing, and the objects to be weighed from different groups do not mix with each other. At intervals, the weighing object of group A is first, B
The timing hopper is controlled so that the objects to be weighed in the group are stored second in the tray 34 and the objects to be weighed in the group C are stored third in the tray 34.

When the group is not designated, the timing hoppers are controlled so that the objects stored in the respective timing hoppers do not mix with each other until they reach the collecting position (tray 34).

The timing hopper opening / closing control section 47 is provided with a time information memory 48, a discharge timing determining means 49, a discharge start timing memory 50, a timing hopper specifying means 51, and a shutter opening / closing means 52.

The time information memory 48 has the same set conveyors Th1 to Th10 as the arrival times Th1 to Th10 from when the timing hopper is opened and closed to when the objects discharged from the timing hopper reach the predetermined set position (tray 34). The time difference Δt between the opening and closing timings of the two timing hoppers for overlapping the objects to be weighed of the two timing hoppers adjacent to each other on the collecting conveyor, and the time ΔT necessary for the objects to be weighed of different groups not to be mixed with each other.
(That is, a value obtained by dividing the length of the objects to be weighed on the conveyer by the conveyor speed). In this case, since the ten weighing and discharging lines are arranged symmetrically five by five with respect to the gathering position, the arrival time Th1 = T
h10, Th2 = Th9,..., Th5 = Th6.

The discharge timing determination means 49 determines the discharge start timing of the group A from the discharge start of the group A based on the group information set by the group setting means 40 and the time information stored in the time information memory 48. Is determined and stored in the discharge start timing memory 50.

The timing hopper designating means 51 constitutes the discharge control means of this embodiment together with the shutter opening / closing means 52. When the group is designated by the group setting means 40, the timing hopper is switched from the weighing hopper to the timing hopper. When the objects to be weighed are discharged, the timing hopper is moved for each group from the farthest position from the set position based on the group information set by the group setting means 40 and the time information stored in the discharge start timing memory 50. Specify in order.

When the group is not designated, the timing hoppers containing the objects to be weighed from the weighing hoppers are checked and the objects to be weighed stored in the respective timing hoppers are moved to the collecting position (tray 34). Specify the timing hopper at a timing that does not mix with each other.

When the group is designated by the group setting means 40, the shutter opening / closing means 52
If the object to be weighed is stored in the timing hopper designated by the timing hopper designation means 51, the shutter of the timing hopper is opened and closed to collect the object to be weighed on the collecting conveyor 30,
31. When the group is not specified by the group setting unit 40, the shutter of the timing hopper specified by the timing hopper specifying unit 51 is opened and closed unconditionally.

FIGS. 4 to 6 are flowcharts showing the processing procedure of the timing hopper opening / closing control section 47. Less than,
The operation of this embodiment will be described based on this flowchart.

First, at the start of operation, it is determined whether a group is designated as shown in FIG. 4 or whether two groups are designated (S1, S2).

Here, for example, when two groups are designated as shown in FIG. 3, the time Tb indicating the discharge start timing of the B group is set to ΔT, and the combination is selected by the combination selecting means 42. It waits for the object to be weighed to be discharged from the weighing hopper to the timing hopper (S3, S4).

Then, immediately after the objects to be weighed selected in the combination are discharged from each weighing hopper to the timing hopper,
The timing hoppers of the group A are designated in order from the furthest from the gathering position to the closest ones at intervals of Δt, and if an object to be weighed is accommodated in the designated timing hopper, the timing hopper is opened and closed to remove the object to be weighed. It is discharged (S5 to S10).

From the start of the processing S5 to S10, Tb
After the elapse of the time (= ΔT), in parallel with the processing S5 to S10, the timing hoppers of the B group are sequentially designated from the furthest position to the nearest position from the gathering position at intervals of Δt, and the designated timing hoppers If the object is stored, the object is discharged (S11 to S1).
7). When the processing of the A group and the B group is completed, it waits for the next opening and closing of the weighing hopper (S1).
8, S19).

FIG. 7 shows an example of the two-group process when the group is designated in FIG. 3, and FIGS. 7 (a) to (e) in FIG.
As described above, the objects to be weighed Wa selected as a combination in the group A are grouped on the conveyer 30 and carried out from the conveyer 30. On the other hand, the objects to be weighed selected as a combination in the group B are carried out. The object Wb is carried out of the conveyer 31 with a delay of ΔT from the objects to be weighed in the group A, and as shown in FIG.
The object Wa to be weighed is accommodated in the lower layer 4 and the object Wb is accommodated in the upper layer.

Therefore, if different types of objects to be weighed are supplied to the weighing and discharging line of the group A and the weighing and discharging line of the group B, respectively, the type of the group A is accommodated in the lower layer, and the type of the group B is stored in the upper layer. There is a product housed on the side.

Here, a description has been given of the group designation for dividing the weighing and discharging lines into the same number on the left and right. However, even when the number of weighing and discharging lines in the two groups is different, the same result as above can be obtained.

When three groups are designated, the processing shown in FIG. 5 is performed. That is, the difference between the arrival time T _B the farthest metering discharge line farthest metering discharge reaching time T _A and B groups of lines of group A at the beginning Delta] T1 (= T _B -T
In _A), but the difference between the arrival time T _C of the farthest metering discharge line farthest metering discharge line of the arrival time T _B and C group B Group ΔT2 (= T _C -T _B) and calculating a (S21 ).

Then, ΔT1 and ΔT are compared, and ΔT1
Is greater than or equal to ΔT, that is, as shown in FIG. 8, the group A is grouped so as to be sandwiched between the group B and the group C, and the distance from the gathering position to the furthest metering discharge line of the group A is If the difference between the gathering position and the distance from the farthest weighing discharge line of the B group is sufficiently large, the time T _ab indicating the discharge start timing of the B group.
Is set to 0, and the time _Tbc indicating the discharge start timing of the C group is set to ΔT (S22, S23).

When ΔT1 is equal to or larger than 0 and smaller than ΔT, that is, as shown in FIG. 9A, the groups C are sandwiched between the groups A and B (T _A = T _B ). 9A, the group A is grouped such that the group A is sandwiched between the group B and the group C, and the distance from the gathering position to the furthest weighing discharge line of the group A. Is smaller than the distance from the gathering position to the farthest weighing discharge line of the B group, the time T _ab indicating the discharge start timing of the B group is set to ΔT−ΔT1, and the discharge start timing of the C group is set. time T _bc showing a is set to ΔT-ΔT2 (S24, S25) . In this case, ΔT2 is 0 or negative.

When .DELTA.T1 is negative and .DELTA.T2 is not less than .DELTA.T, that is, as shown in FIG. 10, group A is divided into group A and group C so that group B is interposed, and group B is farthest from the set position. If the difference between the distance to the weighing and discharging line of and the distance from the gathering position to the farthest weighing and discharging line of the C group is sufficiently large, the time T _ab indicating the discharge start timing of the B group is set to ΔT−ΔT1. And the time T indicating the discharge start timing of the C group
_bc is set to 0 (S26, S27).

When .DELTA.T1 is negative and .DELTA.T2 is smaller than .DELTA.T, that is, as shown in FIG. 11, group B is divided into groups A and C so that group B is interposed. When the difference between the distance to the farthest weighing and discharging line and the distance from the collecting position to the farthest weighing and discharging line in the C group is small, the time T _ab indicating the discharge start timing of the B group is ΔT−ΔT1. T _bc indicating the discharge start timing of the C group
Is set to ΔT−ΔT2 (S28).

After the discharge start timings of the groups B and C are set as described above, when the objects to be weighed selected in the combination are discharged from each weighing hopper to the timing hopper,
In exactly the same manner as the two group designation processes S5 to S10S, the timing hoppers of the A group are sequentially designated from the furthest position to the closest position at the Δt interval from the set position,
If an object to be weighed is stored in the designated timing hopper, the timing hopper is opened and closed and the object to be weighed is discharged onto the collecting conveyor (S30 to S35).

After the time T _ab , the same processing is started for the timing hopper of the group B.
After _bc time, the same processing is started for the timing hopper of the C group (S37 to S43, S45 to S43).
51).

For this reason, as shown in FIG.
The weighing objects Wa of the A group are first conveyed out as a lump on the collecting conveyors 30 and 31, and then the weighing objects Wb of the B group are discharged at least ΔT time later, and further at least ΔT time later, the weighing objects W of the C group are discharged. The weighing object Wc is discharged, and as shown in FIG. 12B, the weighing object Wa is stored in the lower layer of the tray 34, the weighing object Wb is stored in the middle layer, and the weighing object is stored in the upper layer. Object W
c will be accommodated.

Therefore, if different types of objects to be weighed are supplied to the respective groups, the objects to be weighed of different types can be stored in the tray 34 in three designated layers in the specified order.

Next, the group non-designating process of FIG. 6 will be described. When the group is not designated by the group setting means 40, when the objects to be weighed selected in the combination are discharged from the weighing hopper to the timing hopper, the number m of the weighing discharge lines selected in the combination is obtained. Of the weighing and discharging lines selected for the combination, the number a of weighing and discharging lines having the same arrival time, that is, the weighing and discharging line at the same distance from the gathering position is obtained.
Is subtracted to obtain n (S61 to S64).

Then, the variable k is set to 1, and among the timing hoppers containing the objects to be weighed, the k-th counting from the position closer to the gathering position is designated, and it is determined whether there is one set of the k-th hopper on the left and right. It is determined (S65 to S67). When there is only one k-th hopper, the difference T _{k + 1} −T _k between the k-th and k + 1-th arrival times of the weighing discharge lines selected for the combination is compared with ΔT, and T _k is _{obtained. +1} If -T _k is smaller than ΔT, the objects to be weighed k-th hopper is opened and closed is discharged, k from the discharged after ΔT time returns to the process S66 is 1 increased update (S68～ S7
2).

When the k-th hopper has one set of left and right hoppers, the timing hoppers from the collection position to the (k-1) th hopper and the k-th left hopper at the same time in the weighing discharge lines selected for the combination are simultaneously set. It is opened and closed and the objects to be weighed are simultaneously discharged (S73). Then, a difference T _{k + 1} −T _k between the k-th and k + 1-th arrival times after ΔT time and Δ
T and are compared, T if k _{+ 1} -T _k is smaller than ΔT, the objects to be weighed are discharged k th right hopper is opened and closed, processing progresses to S71 from the discharged after ΔT time Then, k is updated by 1 and the process returns to S66 (S73-
S77).

In the same manner, the above process is repeated until k = n. When k = n, all the hoppers not discharging the objects to be weighed out of the timing hoppers of the weighing / discharging line selected for the combination are used. The objects to be weighed are simultaneously opened and closed and are simultaneously discharged (S78).

For example, as shown in FIG. 13, when the objects to be weighed W1 to W3 are stored in the timing hoppers of the weighing and discharging line whose arrival time difference is equal to or longer than ΔT, the above-mentioned steps S66 to S66 are performed.
The processing excluding the processing S69 and S70 in the processing of 72 is k = n
Is repeated until all the objects to be weighed W1 to W3 are simultaneously discharged onto the collecting conveyors 30 and 31.

As shown in FIG. 14 (a), the objects to be weighed W1 and W2 are accommodated in the timing hopper of the weighing and discharging line having the same arrival time, and the difference in the arrival time is more than ΔT. When the weighing object W3 is stored in the distant timing hopper, among the timing hoppers having the same arrival times, for example, the weighing object W1 stored in the left timing hopper is discharged first, and after ΔT time, the weighing object W3 in FIG. As shown in (b), W2 and W3 are simultaneously discharged.

As described above, when there is no group designation, any objects to be weighed, which are selected as a combination and discharged from the hopper, are carried out from the collecting conveyors 30 and 31 at mutually different timings. Even an elongated object to be weighed, such as boiled-in tsukudani, can be accommodated in the tray 34 with little entanglement.

When there is only one weighing line in one group as shown in FIG. 9B and FIG. 11, the objects to be weighed on this weighing discharge line are discharged every time. .

[0061]

[Other Embodiments] In the above embodiment, a case has been described in which a group is set so that a plurality of weighing and discharging lines included in one group are continuous. For example, in the case of specifying two groups, FIG. 15), the A group can be set so as to be sandwiched between the B groups, and conversely, the B group can be set so as to be sandwiched between the A groups as shown in FIG. It is.

In the case of setting as shown in FIG. 15A, if T _B -T _A is not less than ΔT, T _ab = 0 and
The designation of the furthest timing hopper of the group A and the designation of the furthest timing hopper of the group B need only be started at the same time. If T _B -T _A is smaller than ΔT, T _ab = ΔT.
What is necessary is to start the designation of the farthest timing hopper of the B group after ΔT time from the designation of the farthest timing hopper of the A group.

When the setting is made as shown in FIG. 15B, the time obtained by adding ΔT to the absolute value of T _B -T _A is T
_{As ab} , the designation of the farthest timing hopper of the B group may be started T _ab time after the designation of the farthest timing hopper of the A group. In the above-described embodiment, the objects to be weighed are gathered at the same gathering position by two gathering conveyors. However, the present invention can be applied to a case where there is one gathering conveyor or a case where there are three or more gathering conveyors. In the case where the number of the conveyer is one, the process S67 in the flowchart of FIG.
And steps S73 to S77 may be omitted.

In the above embodiment, the combination is selected from the objects to be weighed stored in the weighing hopper.
The object to be weighed by the weighing hopper may be temporarily stored in the timing hopper, and the object to be weighed by the timing hopper and the object to be weighed by the weighing hopper may be involved in the combination calculation. However, in this case, the objects to be weighed in the weighing hopper are selected in combination with the objects to be weighed in the corresponding timing hopper. The timing hopper may be omitted, and the objects to be weighed may be directly discharged from the weighing hopper onto the collecting conveyor.

In the above embodiment, the measuring and discharging lines are divided into a maximum of three groups.
More than two groups may be provided.

[0066]

As described above, according to the first aspect of the present invention,
The combination weighing device is based on a group code arbitrarily set for each weighing and discharging line and a distance from the gathering position to each weighing and discharging line, based on the weighing and discharging line where the same group code is set. The objects to be weighed are discharged at substantially the same timing, and the objects to be weighed discharged from the weighing / discharge lines having different group codes are set at predetermined intervals so as to reach the collecting position. The discharge timing of the line is determined, and the objects to be weighed selected for each group code by the combination selection means are discharged onto the collecting conveyor in accordance with the determined discharge timing.

For this reason, even when different kinds are supplied to the weighing and discharging line for different kinds of weighing and discharging line groups and different kinds of mixed weighing are carried out, the other kinds are gathered together without being mixed with each other in a united state for each kind. Can be aggregated to locations.

If the group codes specify the set order as in the combination weighing device according to the second aspect of the present invention, they are mixed with each other in the set order according to the group code in a state of being grouped for each product type. They can be gathered at the gathering position without matching.

Further, in the combination weighing device according to the third aspect of the present invention, all the objects to be weighed selected in the combination are gathered at the gathering position in ascending order from the gathering position at intervals that do not mix with each other until they reach the gathering position. The discharge timing of the metering discharge line is controlled in such a manner as to perform the above.

Therefore, even when measuring an elongated object such as kelp tsukudani, it can be collected at the collecting position without being entangled at the unloading position of the collecting conveyor.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an overall mechanism of an embodiment of the present invention.

FIG. 2 is a block diagram of one embodiment.

FIG. 3 is a diagram showing an example of specifying two groups.

FIG. 4 is a flowchart illustrating a processing procedure when two groups are designated according to the embodiment;

FIG. 5 is a flowchart showing a processing procedure when three groups are designated according to the embodiment;

FIG. 6 is a flowchart illustrating a processing procedure when a group is not specified according to the embodiment;

FIG. 7 is a diagram showing an operation example when two groups are designated;

FIG. 8 is a diagram showing an example of specifying three groups.

FIG. 9 is a diagram showing an example of specifying three groups.

FIG. 10 is a diagram showing an example of specifying three groups.

FIG. 11 is a diagram showing an example of specifying three groups.

FIG. 12 is a diagram showing an operation example when three groups are designated;

FIG. 13 is a diagram showing an operation example when a group is not specified;

FIG. 14 is a diagram showing an operation example when a group is not specified;

FIG. 15 is a diagram showing a modification when two groups are designated.

[Explanation of symbols]

 Reference Signs List 24 Weighing hopper 26 Weighing device 27 Timing hopper 30, 31 Assembly conveyor 34 Tray 40 Group setting means 42 Combination selecting means 49 Ejection timing determining means 51 Timing hopper specifying means 52 Shutter opening / closing means

Claims (3)

[Claims] 1. A collecting conveyor for unloading articles to a predetermined collecting position, and a plurality of weighing and discharging lines arranged above the collecting conveyor and capable of weighing the supplied objects and discharging the weighing objects to the collecting conveyor. Having a combination weighing device that discharges the objects to be weighed selected from the objects to be weighed in each of the weighing and discharging lines to the collecting conveyor and collects the objects at the collecting position. Group setting means for arbitrarily setting a plurality of group codes, and the same group code is set based on a distance from the gathering position of each of the weighing and discharging lines and a group code set for each of the weighing and discharging lines. The objects to be weighed discharged from the weighing and discharging line are gathered at the gathering position at substantially the same timing, and different group codes are set. Discharging timing determining means for determining the discharging timing of each of the weighing and discharging lines so that the objects to be weighed discharged from the weighing and discharging lines reach the gathering position at predetermined intervals so as not to mix with each other; Combination selecting means for selecting a combination of objects to be weighed on the weighing discharge line in which is set, and the objects to be weighed selected for each group code by the combination selecting means, by the discharge timing determining means. A discharge control means for discharging from the weighing discharge line onto the collecting conveyor in accordance with the determined discharge timing. 2. A collecting conveyor for unloading articles to a predetermined collecting position, and a plurality of weighing and discharging lines arranged above the collecting conveyor and capable of weighing the supplied objects and discharging the same to the collecting conveyor. Having a combination weighing device that discharges the objects to be weighed selected from the objects to be weighed in each of the weighing and discharging lines to the collecting conveyor and collects the objects at the collecting position. Group setting means for arbitrarily setting a plurality of group codes representing a set order to the set position; and a distance from the set position of each of the weighing and discharging lines and a group code set for each of the weighing and discharging lines. The objects to be weighed discharged from the weighing discharge lines set with the same group code are gathered at the gathering position at substantially the same timing based on the same group code. Each of the weighing and discharging lines is set so that the objects to be weighed discharged from the weighing and discharging lines to which the group code is set reach the collecting position at predetermined intervals that do not mix with each other according to the collecting order indicated by the group code. Discharge timing determining means for determining the discharge timing of the combination, combination selecting means for selecting a combination of objects to be weighed on the weighing discharge line in which the same group code is set, and each group code by the combination selecting means A combination weighing apparatus comprising: discharge control means for discharging an object to be weighed selected for each discharge from a weighing discharge line onto the collecting conveyor in accordance with a discharge timing determined by the discharge timing determining means. 3. A plurality of collecting conveyors for unloading articles to a predetermined collecting position, and a plurality of collecting conveyors arranged above the respective collecting conveyors, capable of weighing the supplied objects to be weighed and discharging the objects to the collecting conveyor. Having a weighing discharge line, and selecting a combination of the weighed objects weighed in each of the weighing discharge lines based on the weighing result, discharging the selected weighed object to the collecting conveyor and moving the weighed object to the predetermined position. In the combination weighing device to be assembled, the weighing and discharging is performed such that all the objects to be weighed selected in the combination are gathered at the gathering position in order from the closest to the gathering position at intervals that do not mix until reaching the gathering position. A combination weighing device comprising discharge control means for controlling a line discharge timing.