초록 ▼

Each of a plurality of scale units 10 that constitute a combination weigher is provided with a cut gate 11 attached to a lower portion of a powdery-or granular-material hopper 12, a feeding hopper 13 for temporarily retaining a powdery or granular material supplied from the cut gate 11, a gate-type

Each of a plurality of scale units 10 that constitute a combination weigher is provided with a cut gate 11 attached to a lower portion of a powdery-or granular-material hopper 12, a feeding hopper 13 for temporarily retaining a powdery or granular material supplied from the cut gate 11, a gate-type weighing hopper 14 for weighing the powdery or granular material supplied from the feeding hopper 13, and a collecting chute 16 for collecting the powdery or granular material discharged from each weighing hopper 14 and supplying it to a wrapping machine or the like. A load cell 15 is attached to the weighing hopper 14, and the load cell 15 measures the weight of the powdery or granular material for performing combinatorial computing between the weighing hoppers 14. A dust-preventing bellow 18 is provided in between the respective constituting components: the cut gate 11, the feeding hopper 13, the weighing hopper 14, and the collecting chute 16. This makes available a powdery-or granular-material weighing apparatus capable of weighing a powdery or granular material at high speed.

대표청구항 ▼

What is claimed is: 1. A powdery-or granular-material weighing apparatus for weighing a powdery or granular material within a predetermined allowable range of a target weight, the powdery-or granular-material weighing apparatus comprising: a plurality of scale units each for weighing a powdery or g

What is claimed is: 1. A powdery-or granular-material weighing apparatus for weighing a powdery or granular material within a predetermined allowable range of a target weight, the powdery-or granular-material weighing apparatus comprising: a plurality of scale units each for weighing a powdery or granular material, the plurality of scale units constituting a combination weigher which discharges the weighed material from the scale units which constitute a combination that attains, among totals for arbitrary combinations of a predetermined number of weighed values in the scale units, a total that is within the predetermined allowable range of the target weight; and a weighing hopper for weighing the material to be weighed; wherein each of the scale units is provided with a powdery-or granular-material supplying means for supplying the powdery or granular material to the scale units at a constant flow rate; wherein the powdery-or granular-material supplying means is selected from the group consisting of a belt feeder, a disk feeder, a screw feeder, a rotary feeder, an auger, a pinch valve, a wing feeder, a slat valve and a roll feeder; and weighing hopper comprises a cylindrical portion and a pinch valve for opening/closing a lower portion of the cylindrical portion. 2. A powdery-or granular-material weighing apparatus for weighing a powdery or granular material within a predetermined allowable range of a target weight, the powdery-or granular-material weighing apparatus comprising a plurality of scale units each for weighing a powdery or granular material, the plurality of scale units constituting a combination weigher which discharges the weighed material from the scale units which constitute a combination that attains, among totals for arbitrary combinations of a predetermined number of weighed values in the scale units, a total that is within the predetermined allowable range of the target weight; and a weighing hopper for weighing the material to be weighed; wherein each of the scale units is provided with a powdery-or granular-material supplying means for supplying the powdery or granular material to the scale units at a constant flow rate; wherein the powdery-or granular-material supplying means is selected from the group consisting of a belt feeder, a disk feeder, a screw feeder, a rotary feeder, an auger, a pinch valve, a wing feeder, a slat valve and a roll feeder; and wherein the weighing hopper comprises a receiving container that receives the material to be weighed and flips upside down. 3. The powdery-or granular-material weighing apparatus according to claim 1, wherein a dust generation-preventing means for preventing the powdery or granular material from generating dust is provided in between the powdery-or granular-material supplying means and the weighing hopper. 4. The powdery-or granular-material weighing apparatus according to claim 1, further comprising a collecting chute for collecting and discharging the weighed material from the scale units, and a dust generation-preventing means provided in between the weighing hopper and the collecting chute for preventing the powdery or granular material from generating dust. 5. The powdery-or granular-material weighing apparatus according to claim 2, wherein a dust generation-preventing means for preventing the powdery or granular material from generating dust is provided in between the powdery-or granular-material supplying means and the weighing hopper. 6. The powdery-or granular-material weighing apparatus according to claim 2, further comprising a collecting chute for collecting and discharging the weighed material from the scale units, and a dust generation-preventing means provided in between the weighing hopper and the collecting chute for preventing the powdery or granular material from generating dust.