JP3515765B2 - Transport weighing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transport weighing apparatus capable of weighing articles while transporting them, and more particularly to a transport weighing apparatus having high measurement accuracy. 2. Description of the Related Art In a line in which confectionery such as candy is wrapped in child bags one by one, in the wrapping process, goods in which the confectionery is not properly accommodated in the bags, for example, empty goods or missing goods are contained. Some products contain only a part of the confectionery, or some products are cut off between bags and connected. Further, for example, in the production of a beverage in a container, there may be a case where a product is not filled with a predetermined weight of beverage in the container. In such a case, the rejected product is excluded from the line by measuring the weight of the product during the transport on the transport line, and only the product within the specified range is regarded as a passed product. In order to find such rejected products by weight measurement and remove them from the line, as shown in FIG. 3 (a), articles W carried out of the run-up conveyor 1 are transported by a weighing conveyor 5. There is known a transport weighing device configured to be received by the unit 6 and weigh the article by a weighing device 7 during the transport. However, in such a conventional transport and weighing device, rollers 3a and 3b for feeding the transport belt 2 of the run-up conveyor 1 and rollers 6b for feeding the transport belt 6a of the transport section 6 of the weighing conveyor 5 are provided. Since the diameters of 6c are substantially the same, a gap is generated between both conveyors according to the diameter of the roller. For this reason, depending on the diameter of the roller, the small article W of several centimeters or less as described above falls into the gap between the run-up conveyor 1 and the weighing conveyor 5 and cannot move smoothly. In addition, in the production line for beverages in containers as described above, when the product is transferred from the run-up conveyor to the weighing conveyor, the delivery is not performed smoothly due to the interval between the two conveyors, and the product after delivery is a liquid in the container. The beverage is shaken and unstable, and the accuracy of weight measurement on the weighing conveyor is reduced. [0005] As one method for solving this, FIG.
As shown in (b), it is conceivable to provide a transfer plate 8 in a gap between the run-up conveyor 1 and the weighing conveyor 5 so that articles do not fall between the conveyors. However, since the passing plate 8 merely slides the article and has no force to convey the article by itself, if the tip of the bag enters the gap between the passing plate 8 and the conveyer 1, the biting occurs, and the passing plate 8 comes off. And the flow of subsequent articles is greatly disturbed. In addition, even if the transfer speed of the articles on the transfer plate 8 is greatly reduced, and the articles are transferred onto the weighing conveyor 5, the shock due to the difference in speed does not stabilize the posture of the articles on the weighing conveyor, and the weighing is performed. There is a problem that an error occurs. Therefore, as shown in FIG. 4, the two rollers 9, 9 located at positions opposing each other on two adjacent conveyors are both reduced in diameter, and the winding angles of the transport belts 2, 6a are both set to approximately 90 degrees. It has also been proposed to reduce the distance between the two conveyors. However, this configuration has a problem that the number of rollers of the weighing conveyor 5a increases as is apparent from FIG. 4, and the accuracy of weighing decreases. SUMMARY OF THE INVENTION The present invention solves this problem, and enables the transfer from the run-up conveyer to the weighing conveyer even for small articles or articles containing easily oscillating contents such as liquids. It is an object of the present invention to provide a transport and weighing device that can perform smooth and stable weighing with high accuracy. Means for Solving the Problems A transport metering device (10)
Has a weighing conveyor (12), weighing means (13) for weighing articles conveyed by the weighing conveyor, and a run-up conveyor (11) for carrying articles into the weighing conveyor,
This is a transport weighing device that weighs the weight of articles carried from the run-up conveyor to the weighing conveyor by weighing means. The weighing conveyor has a large-diameter roller (14) having a relatively large diameter and a cylindrical shape, and a conveyor belt (15) wrapped around the large-diameter roller. The weighing conveyor includes a small-diameter roller (16) which is disposed on the side facing the large-diameter roller and has a relatively small diameter, and a transport belt (18) wound around the small-diameter roller. Then, the transport belt is applied to the large-diameter roller of the measurement conveyor around which the transport belt is looped so that the transport belt of the weighing conveyor and the transport belt of the run-up conveyor substantially form the same transport surface. It is characterized in that the small-diameter rollers of the rotated conveyer are arranged close to each other. FIG. 1 shows an example of an embodiment of the present invention.
This will be described with reference to FIG. FIG. 1 is an overall perspective view of a transport weighing device 10 as an example of an embodiment of the present invention, and FIG. 2 is an enlarged side view of a main part thereof. As shown in FIG. 1, this transport weighing device 10 includes a run-up conveyor 11 for transporting articles.
And a weighing conveyer 12 for receiving articles from the run-up conveyer 11. As schematically shown in FIG.
The weighing conveyor 12 is provided with weighing means 13 for weighing articles conveyed by the weighing conveyor 12,
The weight of the article can be measured while being transported. The weighing conveyor 12 includes a pair of rollers 1.
The conveyor belt 15 is wrapped around 4,14. The roller 14 of the weighing conveyor 12 is a large-diameter roller 14 having an outer shape of a right circular column and having a relatively large diameter as compared with a roller of the run-up conveyor 11 described in detail later.
The outer diameter of the large-diameter roller 14 of this example was 25 mm. Also,
The rollers of the conveyor in the conventional transport weighing device 10 are as follows:
The spindle shape was bulged at the center in the axial direction. this is,
This is to prevent the belt from coming off the roller due to an inward force applied to the belt from the roller during operation. On the other hand, in the present embodiment, the outer shape of the large-diameter roller 14 is formed into a right cylindrical shape so that the article is as stable as possible. The running conveyor 11 includes a pair of rollers 1.
The transport belt 18 is wrapped around a plurality of roller groups including 6 and 17. A pair of rollers 1 of the run-up conveyor 11
Among the rollers 6 and 17, the roller 16 disposed on the side of the weighing conveyor 12 facing the large-diameter roller 14 is a small-diameter roller 16 having a smaller diameter than the large-diameter roller 14. The outer diameter of the small-diameter roller 16 of this example was 7 mm. As the other roller 17 of the pair of rollers, the same roller as the large-diameter roller 14 was used. Also, as shown in FIG.
1 also has a tension roller 19 and an intermediate roller 20. The tension roller 19 between the small-diameter roller 16 and the intermediate roller 20 can be adjusted and fixed at a desired position, and the tension applied to the transport belt 18 can be arbitrarily adjusted. As shown in FIGS. 1 and 2, the weighing conveyor 12 and the auxiliary conveyor 11 are arranged in a line, and the transport belt 15 of the weighing conveyor 12 and the transport belt 18 of the auxiliary conveyor 11 are substantially on the same transport surface. Is configured. That is, the small-diameter roller 16 of the run-up conveyor 11 is arranged close to one of the large-diameter rollers 14 of the weighing conveyor 12. In this example, the large-diameter roller 14 shown in FIG.
The distance between the center of the roller and the center of the small-diameter roller 16 was mm. As a result, the gap between the two transport belts 15 and 18 in the transport plane of the transport belts 15 and 18 is m
m, which is smaller than the conventional size. According to the above configuration, the articles conveyed by the run-up conveyor 11 are transferred to the weighing conveyor 12 and weighed. At the time of the transfer, even if the object is a small article or an article containing an easily oscillating content such as a liquid, a smooth and stable transfer can be performed because the interval between the two conveyors is small. In addition, the weighing conveyor 12 has the simplest configuration as a belt conveyor in which the conveyor belt 15 is wrapped around the pair of large-diameter rollers 14, so that the weight measurement can be made in comparison with a complicated configuration using many rollers. Therefore, according to the present apparatus, highly accurate weighing can be performed as a whole. In this embodiment, a small-diameter roller 16 having a small outer diameter is used for the run-up conveyor 11 in order to make the distance between the run-up conveyor 11 and the weighing conveyor 12 as small as possible.
In this run-up conveyer 11, a large-diameter roller 17, an intermediate roller 20, and a tension roller 19 are used instead of directly circulating a conveyor belt 18 around a pair of small-diameter rollers 16. For this reason, the winding angle of the transport belt 18 around the small-diameter roller 16 is large, the radius of curvature of the return portion of the transport belt 18 does not become small, and the transport belt 18 is not forced. Also, there is no curving during the operation stop period, no irregularities in the transport speed during the operation, and no reduction in the measurement accuracy. According to the present invention, since the distance between the run-up conveyor and the transport conveyor is small, the transfer of the articles is smooth even for small articles and articles containing contents that are easily shaken such as liquids. It is stable and has the effect of weighing with high precision.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a transport weighing device according to an embodiment of the present invention. FIG. 2 is a side view illustrating a main part of a transport weighing device according to an embodiment of the present invention. FIG. 3 is a diagram schematically illustrating an example of a conventional weighing and conveying device. FIG. 4 is a diagram schematically illustrating an example of a conventional weighing and conveying device. [Description of Signs] 10 ... Measurement / conveyance device 11 ... Start-up conveyor 12 ... Measurement conveyor 14 ... Large-diameter roller 15 ... Conveyer belt 16 ... Small-diameter roller 18 ... Conveyer belt

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Claims (1)

(57) Claims 1. A weighing conveyor (12) and weighing means (13) for weighing articles conveyed by the weighing conveyor.
And a run-up conveyor (11) for loading articles into the weighing conveyer, wherein the weighing means weighs the articles conveyed from the run-up conveyer to the weighing conveyer by the weighing means. It has a large-diameter roller (14) in the shape of a right column having a relatively large diameter, and a conveyor belt (15) wrapped around the large-diameter roller, wherein the run-up conveyor faces the large-diameter roller of the weighing conveyor. A small-diameter roller (16) disposed on the side to be fixed and having a relatively small diameter, and a transport belt (18) wrapped around the small-diameter roller, wherein the transport belt of the measuring conveyor and the transport belt of the run-up conveyor are substantially The large-diameter rollers of the weighing conveyor around which the conveyor belt is looped so as to constitute the same conveyor surface, the traveling conveyor around which the conveyor belt is looped. Conveying metering device, characterized in that arranged serial in close proximity to the small diameter roller.