JPH0716655B2 - Weight sorter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is a weight sorter that weighs a single weight of articles such as agricultural and marine products and sorts each article into a plurality of ranks based on the weighted weight value. Regarding

(Prior Art) For example, pearl pearl oysters for culturing pearls differ in size and quality of the pearls grown depending on their growth rate, that is, the weight of pearl pearl oysters. The weight is selected according to the fineness, but this kind of selection work is required to be intensively performed within a very limited period in relation to the transaction period. Therefore, the applicant of the present invention has filed prior patent applications (JP-A-59-76583 and JP-A-60-231117).
No.), this kind of sorting work can be done efficiently,
In addition, we proposed a weight sorter that is compact and has excellent storability during non-working periods.

In all of these weight sorters, the articles to be sorted are weighed by a weighing device one by one into a plurality of buckets that are circulated and transported by a transport device in a predetermined route, and the buckets are circulated and transported. One configured to operate the bucket from the article holding posture to the article discharging posture when passing through the discharging stations corresponding to the weight-based ranks of the articles in the bucket among the plurality of discharging stations provided along the path According to this, by sequentially supplying the articles to be sorted to the weighing device, sorting of these articles by weight rank is automatically and continuously performed.

However, in this type of weight sorter, it is necessary to surely feed the articles to be sorted supplied from the outside to the weighing device one by one at a constant timing, and the weight is weighed by the weighing device. It is necessary to surely put the sorted articles into the bucket which is being circulated and transferred, at a timing matching the transfer speed.

In order to satisfy such requirements, in the above-mentioned first prior patent application (Japanese Patent Laid-Open No. 59-76583), a weighing hopper constituting a weighing device is provided with a gate, and one article is provided above the hopper. Equipped with pool trays supplied one by one,
When the weighing operation of the articles in the weighing hopper is completed, the gate of the weighing hopper is opened to drop the article into the bucket passing thereunder, and then the gate is closed and the pool tray is tilted. By doing so, the next article on the tray is configured to be fed into the weighing hopper.

Further, in the second prior patent application (Japanese Patent Laid-Open No. 60-231117), in a structure including a plurality of weighing devices, each weighing device has a gate in each weighing hopper, and the gates are provided above these weighing hoppers. Pool hoppers having respective gates are arranged, and at the end of the weighing operation, the gates of the respective weighing hoppers are opened to drop articles into a plurality of buckets at the same time. The gate is opened to supply the next item to each weighing hopper.

(Problems to be Solved by the Invention) According to the above configuration, it is possible to surely perform the operation of supplying an article to the weighing device and the operation of loading the article from the weighing device into the bucket at a predetermined timing. However, on the other hand, there is a drawback in that the mechanism for performing these operations becomes significantly complicated.

That is, in the weight sorter in the first prior patent application, it is necessary to perform the gate opening / closing operation and the pool tray tilting operation in the weighing hopper, and for that purpose, a dedicated motor for performing these operations, and the motor Two sets of cam mechanisms provided for the gate and the pool tray are provided on the shaft rotated by, and two sets of link mechanisms for respectively operating the gate and the pool tray by these cam mechanisms, As a result, the structure and operation are significantly complicated.

Further, in the weight sorter in the second prior patent application, the gate of the weighing hopper and the gate of the pool hopper are configured to be opened and closed by cylinders, but since these gates have different opening and closing times, a cylinder is provided for each gate. Are required, resulting in a similarly complicated structure.

(Means for Solving the Problems) In view of the above-mentioned conventional circumstances, the present invention provides means for supplying articles to a weighing device in this kind of weight sorter and means for loading the articles into the bucket. The present invention is intended to simplify the configuration of, and is characterized by having the following configuration to achieve this purpose.

That is, the weight sorter according to the present invention includes a carrying device, a plurality of buckets which are circulated and carried by the carrying device in a predetermined transfer path at a constant pitch interval, and a loading station provided at a predetermined position of the transfer path. A weighing device arranged to weigh the articles to be sorted, an article feeding means for feeding the articles to the weighing apparatus one by one, and an article weighed by the weighing apparatus into a bucket passing through the loading station. When each of the buckets passes through the discharge station corresponding to the rank according to the weight of the articles stored therein, the buckets are respectively arranged in the article loading means for sequentially loading and the plurality of discharge stations provided along the transfer path. In a configuration including a plurality of bucket attitude control means for operating the bucket from the article holding attitude to the article discharging attitude, the article supply means may be operated from outside. A supply table to which articles to be sorted are supplied and a drop port is opened above the weighing pan of the weighing device, and one article is put on the weighing pan from the drop port by rotating in a horizontal plane on the supply table. And a first arm member for dropping the articles one by one, and the article loading means from the weighing device to the bucket is also rotated in the horizontal plane to drop the articles on the weighing pan into the bucket passing through the loading station below. A second arm member, and the first and second arm members are respectively attached to the upper and lower positions of a single vertically extending rotary shaft, and are integrally rotated by the shaft. To do. In that case, the rotary shaft may be rotationally driven by a motor for driving the transfer device, or when the transfer device is provided so as to circulate and transfer the bucket in a horizontal plane, that is, the transfer device. When the drive shaft and the driven shaft are arranged in the vertical direction, the drive shaft or the driven shaft may be used as the rotation shaft of the first and second arm members.

(Operation) According to the above configuration, when articles to be sorted are intermittently supplied from the outside onto the supply table in the article supply means, the articles are dropped by the first arm member that rotates in the horizontal plane on the table. To be dropped onto the weighing pan of the weighing device positioned below from, and the article on the weighing pan will be dropped downward by the second arm member constituting the article feeding means. In this case, if the rotation speeds of the first and second arm members, that is, the time intervals at which these members drop the articles, are made to correspond to the transfer speed of the buckets by the transfer device, they are supplied onto the supply table. The operation of supplying the article to the weighing device, the operation of weighing the weight by the weighing device, and the operation of loading the article from the weighing device into the bucket are sequentially performed.

In particular, according to the present invention, the article supplying operation and the inserting operation as described above are performed only by rotating one rotating shaft, and the rotating shaft is rotated by using the drive motor of the conveying device. With this structure, the driving means for the above operation becomes unnecessary, and when the drive shaft and the driven shaft of the transfer device are arranged in the vertical direction, these shafts can be used as the rotary shaft. In this case, a dedicated rotating shaft for the above-mentioned article supply operation and loading operation is also unnecessary.

(Example) Hereinafter, the Example of this invention is described.

As shown in FIGS. 1 and 2, the weight sorter 1 according to the present embodiment is
It has an article supply unit 3 provided at one end of the elongated pedestal 2 and an article discharge unit 4 extending from the supply unit 3 toward the other end of the pedestal 2, and the side of the supply unit 3 opposite to the discharge unit 4 side. A feeding conveyor 10 is arranged in the container. This input conveyor 10
Is a drive roller 13 which is rotatably supported by the motor 12 at the end of the frame 11 on the article supply unit 3 side, a driven roller 14 rotatably supported at the other end of the frame 11, and both rollers 13, 14. And an endless belt 15 wound between the
The articles to be sorted are moved upward from the lower position by the traveling of 15 and are dropped and supplied to the article supply unit 3. Here, the peripheral surface of the belt 15 has a partition wall at regular intervals.
15a ... 15a are provided, and the articles to be sorted are held between the partition walls 15a ... 15a one by one, so that the articles are intermittently supplied to the supply unit 3.

On the other hand, a carrier device 20 is provided on the gantry 2 so as to extend over both the supply section 3 and the discharge section 4. This transfer device 20
As shown in FIG. 3, a drive shaft 21 vertically arranged at the end on the side of the supply unit 3, a driven shaft 22 vertically arranged at the opposite end, and these shafts 21. It is composed of first and second sprockets 23 and 24 which are respectively fixed to and 22, and a chain 25 which is wound between both sprockets 23 and 24. The drive shaft 21 is rotated by a motor 26 via a transmission member 27. When driven, the chain 25 runs in the A direction in the horizontal plane. And this chain
A plurality of (28 in the example in the figure) buckets 28 ... 28 are attached to the 25 at a constant pitch, and the chain 25 travels to circulate these buckets 28 ... 28 along the oval travel path. It has become so. In that case, each bucket 28 has its back portion connected to a connecting member 29 mounted at a predetermined position of the chain 25 via a pin 30 extending in the traveling direction of the chain 25, and the center of the pin 30, that is, the chain.
It is possible to tilt from a horizontal position to a forward tilt position in a plane orthogonal to the traveling direction of 25 (see FIG. 4). Further, in the discharge part 4 in which the buckets 28 ... 28 are circulated and transferred by the transport device 20, discharge stations 4 ₁ to 4 ₁₀ are provided at five locations along the forward path A ₁ and the return path A ₂ of the chain 25. And the 1st to 5th discharge stations on the outward route A ₁
4 ₁ to 4 ₅ and 6th to 9th discharge stations on the return path A ₂
4 _{6-4 9} in correspondence, first to ninth bucket attitude control device 40 ₁ to 40 ₉ is provided on the frame 2. All of these attitude control devices 40 ₁ to 40 ₉ have the same configuration,
As shown in FIG. 4, a bracket 42 erected on the pedestal 2 via a base member 41, and a lever member 44 pivotally supported on the upper end of the bracket 42 via a support member 43 at the rear end. ,
A spring 45 for urging the lever member 44 downward, and a solenoid 46 for swinging the lever member 44 upward against the spring 45 by the rod 46 protruding upward when energized. An engaging portion 44a having a predetermined length that extends in the traveling direction of the chain 25 is provided at the tip of the lever member 44, and when the tip of the lever member 44 is located below, the engaging portion 44a is in the bucket 28. The bucket 28 is held in a horizontal posture (article holding posture) shown by a solid line by engaging with a flange portion 28a protruding from the upper edge of the back of the
Further, when the lever member 44 is swung upward due to the energization of the solenoid 46, the engagement of the engagement portion 44a with the flange portion 28a is released, so that the bucket 28 is tilted forward from the horizontal posture. It is designed to be tilted by its own weight in the (article discharge posture). In this tilted posture, the buckets 28 ... 28 are supported by the receiving plates 50, 51 arranged along both sides of the gantry 2. Also,
Each bucket 28 is transferred in the direction A by running the chain 25 while the flange portion 28a is engaged with the engaging portion 44a of the lever member 44 and is held in the horizontal posture. _1-40 when the lever member 44 ... 44 at ₉ is positioned below, by the flange portion 28a of the bucket 28 to be engaged with the engagement portion 44a ... 44a in the lever member 44 ... 44 sequentially downstream, horizontal It is transferred while maintaining its posture.

The end portion of the counter-supply portion 3 side of the article discharge portion 4, that is, the fifth discharge station 4 ₅ The pivoting of the chain 25 between the sixth discharge station 4 _6, as shown in FIG. 5, By supporting the lower surface of the front portion of the bucket 28, the bucket 28
An arc-shaped first guide member 52 that turns while holding the bucket in a horizontal posture, and a front lower surface of the bucket 28 that is already tilted forward by any of the _first to _fifth posture control devices 40 ₁ to 40 _5. By receiving and supporting the arc-shaped second guide member 53 for rotating the bucket 28 in the forward tilted posture, the articles in the bucket 28 rotated in the horizontal posture are discharged outward by centrifugal force. An article discharge prevention plate 54, which is also arcuate in shape, is provided along the turning locus of the front end portion of the bucket 28 for blocking.

As shown in FIG. 3, not provided with the above-described bucket attitude control device in the tenth discharge station 4 ₁₀ position closest to the supply section 3 in the backward path A ₂ transport path,
Thus first to ninth discharge station ₄₁ to ₉ bucket 28 came that was transported in the horizontal posture is retained, would be tilted in the forward inclined posture always in the tenth discharge station 4 _10, which As a result, all the buckets 28 ... 28 are in the forward tilted posture by the time of shifting to the turning portion on the side of the supply unit 3 in the transfer path. The position directly below the supply unit 3 in the swivel unit is the article loading station 3 _1, and the buckets 28 ... 28 which are tilted forward as described above are fed into the loading station 3 _1. the time is adapted to be returned to a horizontal posture from the stoop by moving while being受支front lower surface in the third guide member 55, 55 becomes higher as the front, and this input station 3 ₁ When the fourth guide member 56 for delivering the bucket 28 which is a horizontal position to the first discharge station 4 ₁ side in this state between the first discharge station 4 _1, the release of the articles in the bucket 28 prevents And a discharge blocking plate 57 for preventing the discharge.
Incidentally, the in the forward path A ₁ transport path as shown in Fig. 4 1
~ _1st to _5th directly below the 5th discharge stations 41 to 45
The receiving boxes Y _{1 to} Y ₅ are installed, and the _sixth to _tenth discharge stations 4 ₆ to 4 ₁₀ on the return path A ₂ are provided with upper ends of the chutes 58 inclined downward toward the outward path A ₁ side. are located, the sixth to tenth receiving box Y ₆ to Y ₁₀ having a lower end disposed below the said first to fifth receiving box Y ₁ to Y ₅ in the chute 58
Facing.

Next, the configuration of the article supply unit 3 at one end of the gantry 2 will be described.
Explaining with reference to FIGS. 6 and 7, the supply unit 3 is provided with a supply base 60 having a concave upper surface, and a load detector 71 and a detector 71 are provided below the supply base 60. bracket
A weighing device 70 consisting of a substantially fan-shaped weighing pan 73 attached via 72 is installed. Then, the loading conveyor 10
The articles that are intermittently dropped from are dropped into the concave portion 61 of the supply base 60, and the article dropping port 62 is substantially fan-shaped above the weighing pan 73 on the bottom surface of the concave portion 61. It is opened in (see Figures 2 and 6).

The drive shaft 21 of the transport device 20 is projected upward from the center of the circular recess 61 of the supply table 60, and the first arm member 81 is provided at the projecting end.
Further, second arm members 82 are attached to positions directly below the supply base 60, respectively. These arm members 81 and 82 are both bosses 81a and 82a fitted and fixed to the drive shaft 21,
A pair of arm bodies 81b, 81b, 82b, 82b respectively extending in 180 ° opposite directions from the boss portions 81a, 82a, and scrapers 81c, 81c for scraping articles attached to these arm bodies, respectively.
It is composed of 82c and 82c. Then, the first arm member 8
1 is rotated by the drive shaft 21 in the concave portion 61 of the supply table 60, so that the articles thrown into the concave portion 61 are dropped through the dropping port 62.
And the second arm member 82 is rotated so that the scrapers 82c, 82c pass over the weighing pan 73, and the second arm member 82 is rotated from the drop opening 62 onto the weighing pan 73 of the weighing device 70 located below. The articles on the weighing pan 73 are designed to drop downward. In that case, into the recess 61 of the supply base 60,
By the loading conveyor 10, articles are dropped one by one between the pair of arm bodies 81b, 81b of the first arm member 81,
The dropping speed of the conveyor 12 and the first arm member 81 (drive shaft 2
The relationship with the rotation speed of 1) is set and the first
After the arm member 81 drops and supplies the articles to the weighing pan 73, the second
The positional relationship between the arm bodies 81b, 81b and 82b, 82b in both arm members 81, 82 is set so that a necessary weighing time is secured until the arm member 82 drops the article from above the weighing pan 73. are, further when the second arm member 82 is to drop the articles on the weighing pan 73, the position of the second arm member 82 and the bucket 28 so that the lower, that is, the dosing station 3 ₁ bucket 28 passes The relationship is set.
Here, in this embodiment, the supply of the articles from the supply table 60 to the weighing pan 73 or the bucket 28 and the loading operation are performed twice per one rotation of the drive shaft 21, so that the bucket by the transfer device 20 is performed.
The transfer speed of 28 ... 28 is also set so that two buckets 28, 28 pass through the charging station 3 ₁ per one rotation of the drive shaft 21. Note that the input station 3 ₁ As shown in FIG. 6, the scraper 82c of the second arm member 82 is weighing pan 7
3 When dropping articles into the bucket 28 from above, the bucket 2
A guide plate 83 is provided to ensure that the material is put into the inside of 8.

In addition to the above configuration, the weight sorter 1 is provided with a control box 90 as shown in FIG. This control box 90 has a power switch 92 on the front control panel 91.
And a start switch 93 for the motor 26 in the transfer device 20.
And the weight-based rank of the item to be sorted 1
A display device 94 having a second display unit 94 ₂ for displaying the weight or process number to that point of the display unit 94 ₁ and the article, of selectively displaying weight or process number in the second display unit 94 ₂ Switches 95 and 96, a switch 97 for clearing the number of processed products to zero, and first and second sorting mode setting switches 98 and 99 for setting a ranking method according to the weight of articles to be sorted.
And are provided.

Here, as the sorting mode, when the article to be sorted is a pearl oyster, the first mode when dealing with mother oysters, the second mode when dealing with juveniles, and the transaction period when dealing with mother oysters, etc. Therefore, the upper and lower limits of each rank in the first mode and the third mode in which the lower limit value is subtracted by 0.5 units are set, and the first mode and the second mode are set by the first selection mode setting switch 98. And switch
The third mode is selected by turning on the second selection mode setting switch 99 while the switch 98 is switched to the first mode side.

Further, in the control box 90, a control device 100 including, for example, a microcomputer is provided. The control device 100 has an input / output port 101 as shown in FIG.
A weight signal a sent from the weight detector 71 in 70 through the amplifier 102 and the AD converter 103, and input signals from the switches 95 to 99 arranged on the control panel 90,
A metering timing signal g sent from a timing generator 104 which will be described later is input.
A CPU 105 is connected to the input / output port 101, and the CPU 105 stores a ROM 1 storing a processing program.
RAM 107 for storing the upper and lower limits of each weight rank in the mode set by the above-mentioned first and second selection mode setting switches 98, 99, the number of treatments by rank, the total number of treatments, etc.
The RAM 107 is provided with a rank memory 108 having a predetermined number of addresses for storing the rank numbers classified by weight.

Then, the display signal h sent from the input / output port 101 to the display device 94, the conveyor drive signal i sent to the motor 12 of the loading conveyor 10 via the driver 109, and the driver 109 are also sent. Via the solenoid 46 in the _first to _ninth bucket attitude control devices 40 ₁ to 40 ₉
The discharge signals j _{1 to} j ₉ sent to 46 (46 _{1 to} 46 ₉ ) respectively are output. The motor of the carrier device 20
26, the drive signal k is directly output by turning on the power switch 92 and the drive switch 93. Also,
The timing generator 104 is turned on and off twice for one rotation of the drive shaft 21 by the cam 110 provided on the drive shaft 21 in the transfer device 20 and by the cam 110.
It is composed of a micro switch 111. Further, the motor 12 of the feeding conveyor 101 is also provided with a second micro switch 112 for detecting the phase thereof.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG. 9 showing the operation of the control device 100.

First, when the power switch 92 and the activation switch 93 on the operation panel 91 are turned on, the control device 100 initializes the input / output port 101 in step P ₁ of the flowchart, and then, in steps P ₂ and P ₃ , the transfer device 20. Timing generator 104 accompanying rotation of motor 26 or drive shaft 21 in
Confirm the OFF operation and ON operation of the first micro switch 111. Then, in step P ₄ , the OFF → ON operation is waited for four times. This operation is performed by the weight sorter 1
When articles remain in the recess 61 of the supply table 60 in the supply unit 3 or on the weighing pan 73 of the weighing device 70 before the operation of, the articles are completely discharged. That is, before the operation, two in the recess 61 of the supply base 60 and one on the weighing pan 73.
There may be up to 3 articles left, but first
While the micro switch 111 repeats the OFF → ON operation three times, the scrapers 81c and 82c of the first and second arm members 81 and 82 are located above the dropping port 62 of the supply base 60 and above the weighing pan 73 of the weighing device 70. It will pass three times each, and during this time, the
Articles left in the recess 61 of the 60 at a position farther than the drop opening 62 are also discharged from the weighing pan 73, and the articles are not completely present in the recess 61 of the supply base 60 and on the weighing pan 73. It becomes.

Then, when the control device 100 finishes this operation and confirms the fourth OFF → ON operation of the first micro switch 111, the control device 100 executes step P _5, and the weight detector 71 in the weighing device 70 is executed.
The weight signal a from is input and the value at that time is stored as a zero point.

If zero setting operation in the operation start time is completed, the controller 100 then step P ₆ performs the sorting operation according to the weight of the sorted articles according to the following, metering device at this time
Since no articles are supplied on the weighing pan 73 of 70, the rank determination operation in steps P _{6 to} P ₁₂ is not performed, and then the start signal i is output to the motor 12 of the loading conveyor 10 in step P ₁₃ . Here, the motor 12 of the feeding conveyor 10 is slightly rotated when the power switch 92 is turned on so that the second micro switch is turned on.
112 has been set at a predetermined position to operate, also the output timing of the start signal to the motor 12 by the step P _13, the OFF → ON operation of the first micro switch 111 is confirmed at step P _6, P ₇ Since the timing is regulated, the motor 12 of the loading conveyor 10 and the drive shaft of the transfer device 20
The phase relationship with 21 will be associated. Therefore,
The time when the articles are loaded by the operation of the loading conveyor 10 and the timing when the first and second arm members 81, 82 pass through the drop opening 62 and the weighing pan 73 by the rotation of the drive shaft 21, respectively, or the bucket 28 is loaded at the loading station. The timing with the passage of 3 ₁ is set to a predetermined timing. Incidentally, until the start signal i to the motor 12 of the feed conveyor 10 is set to OFF in step P _15, the motor 12 regardless of the time of the OFF, the second micro switch 112 is rotated a predetermined amount is operated In other words, the belt 15 of the loading conveyor 10
Is rotated until it moves one pitch (distance to drop one article).

Thus, at the start of operation, the control device 100
Performs only control of the feed conveyor 10 in the moving one pitch at a time while performing the step P ₁₃ to P _20. Then, while repeating this control, the conveyor of the input conveyor 10
The articles to be sorted supplied on the 15 are supply stands in the supply section 3.
The scraper 81c of the first arm member 81, which is sequentially and intermittently loaded into the recess 61 of the 60, rotates in synchronization with the loading timing, sequentially weighs the articles in the recess 61 from the drop opening 62 in the weighing device 70. Supply on plate 73. When the articles are thus supplied onto the weighing pan 73, the control device 100
Is the first microswitch 111 according to steps P ₆ and P ₇ .
After confirming the OFF → ON operation of, that is, timing signal g
The after confirming that the predetermined metered timing, enter the weight signal a from the weight detecting device 71 of the weighing device 70 in step P _8, reads the weight values of articles on the weighing pan 73. The next step P _9, in the first, after determined sorting mode set by the second sorting mode setting switch 98, 99, the mode by performing one of the steps P ₁₀ to P ₁₂ on each weight by rank, determines combined Choshi the read weight value at the lower limit value and the step P _8, the article on the weighing pan 73 corresponds to any of the rank of this mode. Then, the articles whose weight-based ranks have been determined are measured by the scraper 82c of the second arm member 82 in the weighing pan 73.
It is loaded from above into a bucket 28 that passes through a loading station 3 ₁ below it.

In this way, the articles that are sequentially supplied to the weighing device 70, weighed and ranked based on the measured weight value, and then put into the buckets 28 ... discharging the transfer path of the first to tenth discharge station ₄₁ to ₁₀ is provided by the travel although being conveyed in the direction a, on its way, the bucket 28 corresponds to the weight per rank inside of the article When passing through a station, the controller 100 sends a discharge signal j to the solenoid 44 of the bucket attitude controller 40 at that discharge station. This operation will be described in detail. Now, for example, the first to third articles X _{1 to} X ₃ of the fifth rank, the third rank, and the second rank in order from the preceding one in three consecutive buckets 28 ... 28. Have been put in, and these articles X ₁ ~
X ₃ is the 3rd, 2nd and 1st discharge stations 4 ₃ , 4 ₂ and 4 ₁ (respectively
(3, 2nd, 1st rank discharge position). At this time, the first, third, and second addresses in the rank memory 108 provided in the RAM 107 of the control device 100
As shown in the table, the data for the 1st, 2nd, and 3rd articles, which indicate that the weight-based ranks are the 5th, 3rd, and 2nd ranks, respectively, are entered. Therefore, the control device 100 does not output a discharge signal to the respective solenoids 46 ₃ , 46 ₂ , 46 ₁ in these discharge stations 4 ₃ , 4 ₂ , 4 ₁ in step P ₁₄ .

Then, the control unit 100, each article X ₁ ~ in step P ₁₇
The data of X ₃ is sequentially shifted to the next address. In this case, the shift operation causes the rank number (3,2) of the second and third articles to match the address number (3,2). become.

On the other hand, during this time, the fourth bucket 28 ... 28 of each article X ₁ to X ₃ and respectively accommodated, third, second discharge station 4 _4, 4 _3, 4 ₂
Move up to. The control unit 100 then step P ₁₄
When executing the above, since the rank number and the address number of the second and third articles X ₂ and X ₃ located at the _third and second discharge stations 4 ₃ and 4 ₂ are the same, station 4 _3, 4 solenoid 46 in _{2 3,} 46 ₂ to the discharge signal j _3, j ₂
Is output. As a result, the third and second discharge stations
4 _3, 4 solenoid 46 in _{2 3,} 46 ₂ will be energized the lever member 44 is swung upward, the bucket 28 is located in the station 4 _3, 4 ₂ from a horizontal position When tilted to the forward leaning position, the second of these buckets 28, 28,
The third articles X ₂ and X ₃ will be discharged at the third and second discharge stations 4 ₃ and 4 ₂ corresponding to the rank.

In this manner, the articles in each bucket 28 ... 28 is discharged at the discharge station corresponding to the rank in accordance with the weight by rank, first to fifth discharge station 4 ₁
The articles are discharged to 4 ₅ to the first to fifth receiving box Y ₁ to Y _5, also articles discharged at the sixth to tenth station 4 _{6-4 10} sixth through the chute 58 10 Each of the receiving boxes Y _{6 to} Y ₁₀ is sorted according to the rank according to weight and put into the receiving boxes.

When the weight value sent from the weight detector 71 of the weighing device 70 is less than 1 m, in other words, when the articles are not supplied on the weighing pan 73, the control device 100 performs steps P ₁₉ to P _{19. 20} is executed and the weight value at that time is set as the zero point and updated. This is an operation for eliminating a measurement error due to adhesion of foreign matter on the weighing pan 73.
It is carried out by omitting the supply of goods to 12 once.

(Effects of the Invention) As described above, according to the weight sorter according to the present invention, the articles to be sorted sequentially supplied to the weighing device are ranked according to the weight thereof, and the ranking is performed by the bucket of the transport device. According to the present invention, in particular, according to the present invention, the sorting work according to the weight rank of the articles is automatically and continuously carried out. The operation of supplying the articles to the container and the operation of inserting the articles from the weighing device into the bucket of the conveying device are performed only by the rotation of the first and second arm members driven by one rotation shaft. As a result, the structure for performing both of the above operations is significantly simplified. Further, as in the above-described embodiment, the structure can be further simplified by using the rotary shaft also as the drive shaft (or the driven shaft) in the transfer device, and thus the cost of this kind of weight sorter is significantly reduced. Will be done.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is an overall side view of a weight sorter, FIG. 2 is a plan view of the same, FIG. 3 is a plan view showing a configuration of a carrying device, and FIGS. Is IV-IV line, V- in Fig. 3.
FIG. 6 is an exploded perspective view showing the structure of the article supply section, and FIG.
FIG. 8 is an enlarged cross-sectional view of the supply section taken along line VII-VII, FIG. 8 is a circuit diagram showing the configuration of the control device, and FIG. 9 is a flow chart diagram showing the operation of the control device. 1 ... Checkweigher, 3 ₁ ... input station, ₄₁ to ₁₀ ... discharge station, 20 ... transporting device, 21 ... rotary shaft (drive shaft), 26 ... motor, 28 ... bucket, 40 _{1-40 10} ... bucket Attitude control means, 60 ... Supply table, 62 ... Drop opening, 70 ... Measuring device, 73 ... Weighing pan, 81 ... First arm member, 82 ... Second arm member, 110 ... Cam, 111 ... Switch (first micro switch) ).

Claims (6)

[Claims] 1. An article to be sorted, which is arranged in a transfer device, a plurality of buckets which are circulated and transferred by a predetermined transfer path by the transfer device at a constant pitch interval, and a loading station provided at a predetermined position of the transfer path. A weighing device for weighing the weight of the item, an item feeding means for feeding the items to the weighing device one by one, and an item throwing means for sequentially throwing the items weighed by the weighing device into a bucket passing through the loading station.
A plurality of bucket attitude control means, each of which is disposed in each of the plurality of discharge stations provided along the transfer path, and operates a bucket passing through the station from the article holding attitude to the article discharging attitude when receiving a discharge signal; , The weight value obtained by the weighing device is read to determine the rank according to the weight of each article, and when the buckets containing and holding these articles pass through the discharge station corresponding to the rank, the bucket attitude control at that station is performed. A weight sorter having a control device for outputting a discharge signal to the means, wherein the article supply means to the weighing device is supplied with articles to be sorted from the outside and a drop port is opened above the weighing pan in the weighing device. And a piece of articles provided on the weighing pan from the drop port by rotating in a horizontal plane on the supply table. And a first arm member for dropping the object, and means for loading articles from the weighing device to the bucket also rotates in the horizontal plane to load articles on the weighing pan into the bucket passing therebelow. And a second arm member, and the first and second arm members are attached to the upper and lower positions of a single rotary shaft extending in the vertical direction, respectively. 2. The weight sorter according to claim 1, wherein the rotary shafts of the first and second arm members are rotationally driven by a drive motor of the transfer device. 3. A transfer device is provided so as to circulate and transfer each bucket in a horizontal plane, and rotation axes of the first and second arm members are a drive shaft or a driven shaft extending in the vertical direction of the transfer device. The weight sorter according to claim 2, which is also used. 4. The control device inputs a timing signal from a switch which is turned on and off by a cam provided on the rotary shafts of the first and second arm members, and is obtained by the weighing device when the signal is input. The weight sorter according to claim 1, wherein the weight value is read. 5. The control device inputs a timing signal a predetermined number of times in a state where the external supply of articles to the supply table is not started when the weight sorter is started, and the timing of the predetermined number of times is input. The weight sorter according to claim 4, wherein the weight value read from the weighing device when the signal is input is stored as a zero point. 6. The weight sorter according to claim 4, wherein the control device updates the weight value read from the weighing device as a zero point when the weight value is less than or equal to a predetermined value.