JPH03220424A - Sorting shoot of weighed article of granular body - Google Patents

Abstract

PURPOSE:To prevent a weigher from being impaired in precision by a structure wherein a passed article is discharged outside a transparent cover by a fixed shoot and a movable shoot in combination, while a failed article is discharged outside the cover by fixed shoots in combination. CONSTITUTION:A preliminarily weighed article weighed by a preliminary weighing element 11 is sent onto a precision weighing scale 1 through a shoot 12. Next, granular body in hoppers 13 is sent onto the precision weighing scale 2 by a vibrating feeder 14 so that the weighed article be made to accord with a weighing set value. In succession, the weighed article weighed by an electronic weigher 1 is delivered into a fixed shoot 4 by an operation of a device 3 which turns over the precision weighing scale 2. The weighed article on the scale 2 is a failed article when it exceeds a prescribed value, and then the weigher 1 senses it and makes a movable shoot 5 leap up. Therefore the failed granular body is made to flow from the shoot 4 to a fixed shoot 15, discharged outside a cover 9 made of acrylic resin and collected in a vessel 7. A passed article is collected in a vessel 6 through the shoots 4 and 5 and conveyed by a conveyor 8.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a chute for sorting out good weighing products and bad weighing products in the N-tight weighing section of a continuous powder weighing device.

(Prior art) The electronic balance used in the precision weighing section of a continuous weighing device for powder and granules has a sensitivity of IIIg? Because this is a precision balance, the room where the balance is installed is air-conditioned.

In order to maintain the glaze, the entire precision weighing section is surrounded by a cover made of acrylic resin.

That is, FIG. 2 shows the main parts of a conventional continuous weighing device for powder and granular materials. In the figure, 1 is an electronic balance, and 2 is a precision weighing pan. Then, the powder and granules on the weighing pan that have been weighed by the balance are sent to the nationally designated chute 4 by being milled by a device 3 for overturning the precision weighing pan as shown by the arrow in the figure.

The weighed product on the weighing pan may exceed the expected value due to excessive supply of powder or granules, but in this case, the weighing product will be defective, so the electronic balance 1 will detect this and issue a signal to move the movable chute 5. Since the powder is thrown up in the direction of the arrow, the powder or granules that have been weighed incorrectly are collected into the container 7. On the other hand, the weighed good products are collected into a container 6 via a fixed chute 4 and a movable chute 5, and transported by a conveyor 8. These precision weighing sections are surrounded by a cover 9 made of acrylic resin.

(Invention or problem to be solved) In the conventional technology, as mentioned above, the weighed good products and the defective products are sorted, but the container 7 for collecting the weighed defective products is
is placed inside an acrylic cover, so when taking out a defective product container, operation of the weighing device must be interrupted and the acrylic cover must be removed.

When removing and installing the cover, vibrations may be transmitted to the balance, impairing the accuracy of the balance, and causing various problems such as the weighing value being incorrect after removal.

The present invention has been made in view of the above problems, and includes:
The purpose is to provide a chute for sorting weighed products without having to stop operation of the weighing device or remove the acrylic cover when collecting defective weighed products.

(Means and operations for solving problem y) In other words, the gist of the present invention is that, in the precision weighing section of the powder or granular material pre-weighing section, a weighed good product weighed by an electronic balance inside a transparent cover is
The chute is used for sorting weighed powder and granular materials, and includes a structure in which a fixed chute and a movable chute are combined to discharge the weighed products out of the transparent cover, and a structure in which poorly weighed products are discharged out of the transparent cover by a combination of the fixed chute.

In the present invention, a good weighing product is a weighing product that matches the set weighing value of powder or granular material, and a defective weighing product is a weighing product in which an amount of powder or granular material that exceeds the weighing set value is weighed, and the weighing setting Weighed items that are underweight, so-called underweight items, are often discovered in the final calibration process, and therefore are not included in the problems achieved by the present invention.

Next, the transparent cover that protects the precision weighing part in the present invention is preferably made of a transparent material such as acrylic resin or glass, and it is also important to note that the powder and granules, both good and defective, are initially passed through a fixed chute. However, if the weighed product is good, there is no signal from the electronic balance, so the movable chute does not turn over and the weighed product is discharged to its full length outside the transparent cover. In the case of an incorrectly weighed product, the movable chute is reversed in response to a signal, so that the powder and granules are transferred to a fixed chute extending outside the transparent cover and discharged.

The following will be explained based on examples.

(Example) FIG. 1 is a side view of a continuous weighing device for powder and granular material implementing the present invention. In FIG. 1, reference numeral 10 indicates a powder or granule pre-weighing section where the powder or granules are weighed, and the pre-weighed portion weighed in the pre-weighing section 11 is sent to the precision weighing pan 2 of the precision weighing section via the chute 12. It will be done.

Next, reference numeral 13.13' indicates the powder and granular material, and the powder and granular material is transferred to the precision weighing pan by the vibrating feeder 14 in order to make the weighed product match the weighing setting value in the precision weighing section.
sent to.

In the precision weighing section, it is weighed by an electronic balance 1,
The weighed product is delivered to a fixed chute 4 from the overturned precision weighing pan by the operation of a device 3 for overturning the precision weighing pan.

Then, the weighed product on the weighing device 2 is scheduled due to excessive supply of powder and granules! In this case, the electronic balance 1 senses it and issues a signal to flip up the movable chute 5, so that the powder and granules of the poorly weighed product are removed from the fixed chute 4. It flows into another fixed chute 15, is discharged outside the cover 9 made of acrylic resin, and is collected into the container 7. On the other hand, the weighed good products are collected into a container 6 via a fixed chute 4 and a movable chute 5, and transported by a conveyor 8.

(Effects of the Invention) According to the present invention, even when collecting defective weighed products, the weighed products can be sorted without stopping the operation of the weighing device or removing the transparent cover. Therefore, the accuracy of the balance will not be impaired, and the weighed value will not be out of order.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a continuous weighing device for powder or granular material implementing the present invention, and FIG. 2 is a side view showing a conventional technique. 1...Electronic balance, 2...Precision weighing pan, 4...
Fixed chute, 5...Movable chute, 9...Transparent cover...Fixed chute. Permit applicant Tanaka Kikinzoku Kogyo Co., Ltd. Figure 1 0

Claims (1)

[Claims] In the precision weighing section of a continuous powder weighing device, a structure is adopted in which good weighed products weighed by an electronic balance inside a transparent cover are discharged to the outside of the transparent cover through a fixed chute and a movable chute, and defective weighed products are discharged from a fixed chute. A sorting chute for weighing powder and granular materials, which is constructed by a combination of the following and a structure for discharging outside the transparent cover.