JP2925649B2 - Weighing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weighing device for automatically weighing an object to be sorted by weight.

2. Description of the Related Art Japanese Patent Application Laid-Open No. Sho 59-76583 discloses an endless body 1 which is driven to rotate vertically (in the direction of arrow B) with respect to an installation location A as shown in FIG. turn was placed in the bucket 2, the discharge station 4 ₁ is placed on the bucket 2 more buckets 2 with weighing station 3 disposed to the outside of the endless member 1 is attached to weighed sorting goods for the
When passing through 4 _N , the weight of each item to be sorted is compared with the weight rank of the discharge station, and when the bucket 2 arrives at the discharge station of the corresponding weight rank, the bucket 2 is tilted. Te position of the discharge station in question for example in Figure 7 is configured to discharge the sorted object goods at the location of each weight categories and so the position of the discharge station 4 _2.

Problems to be Solved by the Invention In such a conventional configuration, since the weighing station 3 is located outside the system of the endless body 1, the apparatus becomes large and high-speed weighing is difficult.

Furthermore, when the increasing number selection rank longer placement length of the discharge station 4 ₁ to 4 _N, the problem of greater device is long length of the forward path 5 of the endless body 1 increases in size is there.

An object of the present invention is to realize a compact apparatus and high-speed weighing.

Means for Solving the Problems The weighing device according to claim 1, wherein the endless body that is driven to rotate, a plurality of buckets mounted on the endless body at a predetermined interval, and on which a product to be sorted is placed, Tare storage means for storing a tare amount, and disposed on the upstream side in the transport direction of the transport path of the endless body, and driven to rotate in the same direction as the endless body to measure the load of the bucket passing therethrough. A weighing conveyor, a detecting means for detecting which bucket the measured bucket is, and a predetermined number that is arranged along the transport path on the lower side in the transport direction from the weighing conveyor and can take out the sorting target product from the bucket Between the discharge station and the net weight value of the items to be sorted, corrected by subtracting the tare value from the weighing value on the weighing conveyor, and the sorting weight range determined for each discharge station. A control unit is provided for instructing the discharge station to take out the sorting target product from the bucket when the bucket arrives at the discharge station within the sorting weight range to which the bucket belongs.

The weighing device according to claim 2, wherein the endless body which is horizontally rotated and the forward path and the return path are in the same plane and is driven to rotate, and a plurality of objects which are attached to the endless body at a predetermined interval and load the sorting object. And a tare storage means for storing a tare amount of each bucket, and are disposed on the upstream side in the transport direction of the transport path of the endless body, and are driven to rotate in the same direction as the endless body and pass therethrough. A weighing conveyor for measuring the load of the bucket, a detecting means for detecting which bucket the measured bucket is, and the bucket is arranged along the transport path on the lower side in the transport direction than the weighing conveyor, from the bucket. A predetermined number of discharge stations from which items to be sorted can be taken out, the net weight value of the items to be sorted corrected by subtracting the tare amount from the weighing value on the weighing conveyor, and the number of discharge stations determined for each discharge station Characterized in that a control unit for instructing the retrieval of the sorting subject goods from the bucket to the discharge station to the timing of the bucket has arrived at the discharge station of the sorting weight range belongs by comparing the sorting weight range.

According to the configuration of the first aspect, since the weighing conveyor is provided in the endless body, the articles to be sorted are automatically weighed while being placed on the bucket and transported to the discharge station.

According to the configuration of claim 2, since the endless body rotates horizontally and the forward path and the return path are in the same plane, the discharge station can be provided not only on the forward path but also on the return path.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to FIGS. Note that components having the same functions as those in FIG. 7 showing a conventional example are denoted by the same reference numerals and described.

1 and 2 show a weighing device according to the second aspect.
The endless body 1 is arranged so as to rotate horizontally with respect to the installation location A, and the outward path 5 and the return path 6 are in the same plane. A plurality of buckets 2 on which items to be sorted are placed are attached to the endless body 1 at predetermined intervals. Here, if the conveying direction of the endless member 1 was in the direction of arrow C, the discharge station ₄₁ to ₄ of the upper side weighing conveyor 7 to the conveying direction C
Is installed. The weighing conveyor 7 is driven to rotate in the same direction as the endless body 1, and measures the load of the basket passing therethrough.

The discharge station ₄₁ to ₄ discharge trigger 8 ₁ provided -
8 ₄ is the weight value of the weighing conveyor 7 and each discharge station 4 ₁
It is operated as follows, based on the weight rank is set for each to 4 _4.

As shown in FIG. 3, the load cell 10 of the weighing conveyor 7 is digitally converted by the A / D converter 11 and input to the first controller 9, and the tare amount of each bucket 2 is written. A tare memory 12 and the like are connected. Here, a first position detector 13 for detecting the passage of each bucket 2 and a second position detector 14 for detecting that one specific bucket among the buckets 2 has passed the position immediately before the weighing conveyor 7. It is provided to reset the counted content of the counter 15 when the second position detector 14 detects the first-th bucket 2 ₁ as the particular bucket, the first control unit 9 counter 15 detects that the content of is reset read the tare weight of that particular bucket 2 ₁ from tare memory 12, via the a / D converter 11 to correct the weighing values are given from the load cell 10 Thus, weight data D which is a net weight value is output. The contents of the counter 15 are incremented each time the bucket 2 passes, and are stored in the tare memory.
The tare amount read out from 12 is sequentially switched, and the first controller 9 outputs the net weight value of the sorting target product placed on the bucket 2 passing through the weighing conveyor 7 as the weight data D.
Is output as First for driving the endless body 1 to rotate
A rotary encoder 17 is directly or indirectly attached to the drive motor 16 of the first embodiment. An output of the rotary encoder 17 is connected to a driver 19 of a second drive motor 18 for driving a belt of the weighing conveyor 7. And the running speed of the belt of the weighing conveyor 7 is set to be the same as the running speed of the endless body 1.
Is weighed at high speed.

The second control unit 20 and the like comparator 21 ₁ to 21 ₄ and the discharge trigger 8 _{1-8 4} for each discharge station 41 _{to 4} is connected, the comparator 21 ₁ to 21 ₄ first by comparing the weight ranks and weight data D being output respective weight setter 22 _{1-22 4} from the controller 9, the second control unit 20 discharge trigger 8 _1-8 on the basis of the comparison result ₄ to determine the timing of driving the stored driving the discharge trigger 8 _{1-8 4} corresponding to the appropriate time based on the signal of the rotary encoder 17.

 A specific example will be described with reference to FIG.

FIG. 4 (a) shows the output signal of the first position detector 13;
Figure (b) shows an output signal, Fig. 4 (c) sometimes weight data D and weight classes D _1, D _2, D ₃ of the weight setter 22 _{1-22 3} of the second position detector 14 . FIGS. 4 (d) to 4 (f)
Is a determination result of the second control unit 20 is read from the comparator 21 ₁ to 21 _3, the second control unit 20 first to be as follows
The third discharge trigger 8 _{1-8 3} are driving at an appropriate timing.

The times t ₁ , t ₂ , t ₃ , and t ₄ required for the bucket 2 passing through the weighing conveyor 7 to reach the discharge stations 4 ₁ , 4 ₂ , 4 ₃ , 4 ₄ depend on the traveling speed of the endless body 1. Decided. Second control unit 20
Since the information on the velocity of the measuring conveyor 7 is input from the rotary encoder 17, the discharge triggered when time to reach the discharge station 41 _{to 3} which is determined by the output of the comparator 21 ₁ to 21 ₃ has elapsed 8 _{1-8 3} is driven.

In the fourth example shown in FIG, sixth bucket 2 first ₆ except ~ seventh six buckets 2 ₁ to 2 _5, 2 ₇ first to sixth sorting goods for E ₁ - This shows a case where E ₆ is placed.

Specifically, the first sorting goods for E ₁ placed on the 1st bucket 2 _1, it is determined that the first weight categories by the comparator 21 _1, the second control unit 20 Is the first bucket 2 ₁
The first discharge station 4 hours from the weighing determination time T ₁ as _a first operating time of the discharge trigger ₈₁ so as to tilt by
and stores the after t _1. First discharge trigger ₈₁ at that time as the first bucket 2 ₁ is operated after t ₁ FIG. 4 (g) from the metering determination time T ₁ as shown in time shown in FIG. 4 (j) first sorting goods for E ₁ is the first discharge station and tilted
4 Emitted in ₁ . Similarly, the second selection target product E ₂ is the fourth
Third discharge trigger 8 ₃ second bucket 2 ₂ is operated is discharged by the third discharge station 4 ₃ tilts from the measuring determination time T _2, after a time t ₃ as shown in FIG. (H) . 3rd, 4th
Sorting goods for E _3, E ₄ metering determination time T _3, T respectively after a time t ₂ to ₄ second discharge trigger ₈₂ is operated the third, fourth bucket 2 _3, 2 ₄ is tilted It is discharged by the second discharge station 4 ₂ Te. The selection object items E ₅ the fifth is discharged by the third discharge station 4 ₃ sorting goods for E ₆ The sixth is discharged by the second discharge station 4 _2. The second control unit 20 the time t ₁ ~t ₃ In is clocked by the information on the velocity of the metering conveyor 7 which is inputted from the rotary encoder 17 to the clock.

As described above, the weighing station is arranged in the system of the endless body 1, and the scale is constituted by the weighing conveyor 7 which rotates in the same direction at the same speed as the endless body 1, so that the scale is attached to the endless body 1 and moved. The load of the middle bucket 2 can be measured at high speed without hindering the operation of the endless body 1.

Further, since the outward path 5 and the return path 6 of the endless body 1 are located on the same horizontal plane with respect to the installation location A, the weight rank of the sorting increases and the number of the sorting stations 4 increases. 4 is the first group of sorting stations 4 _A
If divided into a sorting station 4 _B of the second group, a sorting station 4 _A of the first group are arranged in the forward 5 as shown in FIG. 5, to place the sorting station 4 _B of the second group to return 6 Thereby, the required length L of the endless body 1 can be shortened.

In the above embodiment, the weighing station is provided only on the outgoing path 5 of the endless body 1. However, since the outgoing path 5 and the return path 6 of the endless body 1 are in the same horizontal plane with respect to the installation location A,
Also provided measuring conveyor 7 as metering station to return 6 as shown in FIG. 6, the measuring conveyor 7 the forward 5 and the first group of sorting station 4 _A and a set, the weighing conveyor 7 on the return path 6 a a sorting station 4 _B of two groups in the pair can be configured with two weight sorting lines separate. In this case, the sorting target products placed on the bucket 2 at each weight sorting line are so arranged that the sorting target products placed on the bucket 2 on one weight sorting line do not enter the other weight sorting line. In some cases, it is necessary to set the weight rank of the discharge station so as to collect everything in the weight sorting line.

In each of the above embodiments, the endless body 1 was rotated horizontally, and the forward path and the return path were in the same plane. However, as seen in the conventional example shown in FIG. Even in the case of the rotating endless body 1, by disposing a weighing conveyor that is driven to rotate in the same direction as the endless body on the upper side of the discharge station, and disposing the weighing station in the system of the endless body 1. In addition, downsizing of the device and high-speed weighing can be realized.

Advantageous Effects of the Invention According to the configuration of each claim as described above, in the system of the endless body, since the weighing conveyor that measures the load of the bucket while rotating in the same direction as the conveying direction of the endless body is provided, Compared to the case where the weighing station is arranged outside the endless body, the apparatus can be downsized and high-speed weighing can be realized.

Furthermore, according to the configuration of claim 2, since the endless body rotates horizontally and the forward path and the return path are in the same plane, not only the forward path but also the return path of the endless body can be used for the sorting operation. Even when the number of sorting stations increases due to an increase in the number, the required length of the endless body can be shortened, and the apparatus can be further downsized.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of the weighing device according to claim 2,
2 is a front view of the device, FIG. 3 is an electric circuit configuration diagram of the device, FIG. 4 is a waveform diagram of a main part of FIG. 3, and FIGS. FIG. 7 is a plan view and FIG. 7 is a front view of a conventional weighing device. 1 endless body, 2 bucket, 4 discharge station, 5 outbound path, 6 return path, 7 weighing conveyor,
8 ₁ to 8 ₄ ... discharge trigger, 9 ... first control unit, 20 ... second control unit, 21 _{1 to} 21 ₄ ... comparator, 22 _{1 to} 22 ₄ ... weight setting device.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Tomiwa Masumoto 2-35 Jinmucho, Yao-shi, Osaka Inside Kubota Kuhoji Plant (56) References JP-A-62-237981 (JP, A) JP-A Sho 58-43273 (JP, A) Actual opening 56-7584 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) G01G 15/00 G01G 11/00 G01G 23/16 B07C 5 / 16-5/32

Claims (2)

(57) [Claims] 1. An endless body that is driven to rotate, a plurality of buckets mounted on the endless body at a predetermined interval and on which items to be sorted are placed, a tare storage means for storing a tare amount of each bucket, and the endless body. A weighing conveyor that is disposed on the upstream side in the transport direction of the body transport path, is driven to rotate in the same direction as the endless body, and measures the load of the bucket passing therethrough, and which bucket is the measured bucket. Detection means for detecting whether or not, a predetermined number of discharge stations arranged along the transport path on the lower side of the weighing conveyor in the transport direction and capable of taking out the items to be sorted from the bucket,
Subtract the tare weight from the weighing value on the weighing conveyor and compare it with the net weight value of the sorting target product and the sorting weight range determined for each discharging station. And a control unit for instructing the discharge station to take out the sorting target product from the bucket at the timing when the vehicle arrives. 2. An endless body which is horizontally rotated so that a forward path and a return path are in the same plane and is driven to rotate; a plurality of buckets mounted on the endless body at a predetermined interval for placing articles to be sorted; Tare storage means for storing a tare amount of, and disposed on the upstream side in the transport direction of the transport path of the endless body,
The weighing conveyor is driven to rotate in the same direction as the endless body, and measures the load of the bucket passing therethrough, a detecting unit for detecting which bucket the measured bucket is, and a weighing conveyor, A predetermined number of discharge stations arranged along the transport path on the lower side of the direction to take out the sorting target items from the bucket, and the net weight of the sorting target items corrected by subtracting the tare amount from the weighing value on the weighing conveyor A control unit that compares the value with the sorting weight range determined for each discharging station, and instructs the discharging station to take out the sorting target product from the bucket at the timing when the bucket arrives at the discharging station of the sorting weight range to which it belongs. Weighing device provided with.