JP3718727B2 - Dispersion supply device for combination weigher - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides an article supply apparatus for supplying articles to each weighing hopper with a combination weigher in an almost constant amount and evenly, with an apparent specific gravity of 0.01, which is an order of magnitude smaller than that of a normal article. The present invention relates to a dispersion feeding device for a combination weigher corresponding to articles with a very wide weighing range of 0.6 to 5 g and a small amount of articles.
[0002]
[Prior art]
Conventionally, as an apparatus for distributing and supplying an article having a small apparent specific gravity, for example, there is an apparatus disclosed in Japanese Utility Model Laid-Open No. 7-38927. This is a device that loosens a lump of articles by reciprocating across the trays of the linear feeder with the center of the dispersion feeder as a concentric circle by means of a drive motor with the article stirring member provided on the upper part of the linear feeder arranged radially, Since the inversion angle of the article stirring member is as small as 90 degrees to 150 degrees, it is difficult to carry out dispersion due to uneven supply from the dispersion feeder, or near the center when the article rises on the dispersion feeder. . In addition, even if the article stirring member is extended, the rotation angle is small so that a bridge phenomenon or the like occurs, and the processing capacity is greatly reduced. Also, it takes time to prepare and replace the article stirring apparatus corresponding to the processing capacity. There was a problem.
[0003]
[Problems to be solved by the invention]
Recently, there has been a growing demand to increase the processing capacity by further reducing the lower limit of the combined weight compared to the above-described conventional example to widen the combined weight range. For example, when packing bonito shavings with an apparent specific gravity of 0.01, it was 2 to 4 servings in the past for households and 3 to 5 grams, but recently it was 0 for 1 serving of okonomiyaki or yakisoba. The demand for packs weighing from .6 g to 1 g has increased, and since conventional 3 g to 5 g packs are also required, apparatuses capable of processing a wide range have come to be demanded. In order to avoid a decrease in the shipping amount due to the small weight of one pack, it has become necessary to maintain high accuracy and high accuracy as the weighing range is expanded. Then, this invention is providing the dispersion | distribution supply apparatus of the combination scale which can fully exhibit said performance by solving said subject.
[0004]
[Means for Solving the Problems]
To achieve the above object, in an article supply apparatus for a combination weigher, a conical dispersion feeder 8 provided at the center, and a supply feeder that is located above the dispersion feeder and supplies articles onto the dispersion feeder. 6, a funnel 13 that supplies articles from the supply feeder 6 onto the center of the dispersion feeder, and a forward rotation that can be replaced by a crotch body that is located at the center of the dispersion feeder 8 and that has a bifurcated tip. An agitator 10 that repeats reverse rotation, and is pivotally supported coaxially with the agitator 10 so as to repeat normal rotation and reverse rotation integrally with the agitator, and a lump of articles conveyed by the supply feeder 6 is supplied to the supply feeder A bridge breaker 11 for loosening at a substantially leading end on the tray, a motor 1 for driving the agitator 10, and a motor frame 2 to which the motor is attached; Furthermore, a level sensor 15 for detecting the layer thickness of the article on the dispersion feeder attached to the motor frame is provided, the supply feeder is controlled by a detection signal of the level sensor, and a plurality of units supported by the combination weigher main body are supported. A mechanism for moving the motor frame up and down along the pillars is provided. By providing such a mechanism, even with a very small amount of distributed supply, the agitator and the level sensor can be integrated and moved up and down along the column to enable supply without variation. In addition, since the bridge breaker is positioned at substantially the front end of the supply feeder, the supply to the dispersion feeder can be further equalized. (Claim 1)
In addition to the mechanism described in claim 1, in the article supply apparatus provided with a plurality of rectilinear feeders 24 provided radially at the lower portion of the dispersion feeder 8, the article feeders are provided corresponding to the upper portions of the trays of the rectilinear feeder 24. A rotary shaft provided in parallel with the rectilinear feeder tray surface, a reiki rod 18 provided with a plurality of rods projecting radially on the rotary shaft, and a drive motor for driving the reiki rod. The reiki 17 is attached to the reiki frame 21 so that the reiki frame 21 can be moved up and down along a plurality of columns supported by the combination weigher main body. The reiki rod 18 rotates in the direction of rotation. Is rotated so that the tip of the sheet is in the direction opposite to the traveling direction of the article on the linear feeder 24. By providing such a mechanism, the reiki attached to the reiki frame 21 that is a plate-like body on the ring can be adjusted up and down along a plurality of columns supported by the combination weigher main body. The layer thickness of the article on the straight feeder tray can be adjusted to an optimum layer thickness that matches the processing amount, and the conveyance suitable for the target capacity can be stably performed. (Claim 2)
[0005]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, the operation of the agitator extends not only on the distributed feeder in the operating range but also on a plurality of radial linear feeders provided below the agitator. Since it can be selected according to the article and its combination weighing so that it becomes 1 rotation or more from the degree, the equalization of dispersion on the dispersion feeder can be added with the auxiliary effect of the bridge breaker provided coaxially with the agitator, In addition, by selecting a shape of the agitator suitable for weighing, it is possible to expand the weighing range, improve processing capacity and weighing accuracy, and facilitate adjustment work when changing the weighing.
[0006]
【Example】
A first embodiment of the present invention is shown in FIGS. In FIG. 1, A is a plan view of the dispersion supply apparatus, B is a front view as viewed from XX ′, and FIG. 2 is a schematic configuration diagram of the combination weigher in this embodiment. In FIG. 1, reference numeral 1 denotes an agitator motor fixed to the motor frame 2 at the center position of the combination weigher. Reference numeral 3 denotes four pillars supported by a main body of a combination weigher (not shown), and the bosses 4a of the motor frame 2 are fitted on the upper parts of the two pillars 3a located diagonally, and the push screws 5a are used. It is fixed. The motor frame 2 is a rectangular plate as shown in the figure, and the position is adjusted by loosening the push screw 5a and moving it up and down by changing the weighing. Reference numeral 6 denotes a supply feeder that feeds the article 7 from a storage hopper or the like (not shown) to the dispersion supply apparatus. Reference numeral 8 denotes a linear feeder 24 in which the articles 7 supplied by the supply feeder 6 are arranged radially (in this example, the figure is made up of ten stations). It has a conical shape. Reference numeral 9 denotes a stirrer, which includes an agitator 10 having a plurality of crotch tips at the tip, a bridge breaker 11 having a plurality of forks in the middle, and a coupling 12 connected to the motor 1. . A funnel 13 is provided to reduce variations in the drop position of the article 7 supplied from the supply feeder 6 and is attached to the motor frame 2 by two support rods 14. A level sensor 15 detects the layer thickness of the article 7 supplied onto the dispersion feeder 8 and is attached to the motor frame 2 by a bracket 16. Therefore, it is adjusted by moving up and down together with the agitator 9. Reference numeral 17 denotes a reiki having a plurality of rods attached radially from a rotating shaft and comprising, for example, a reiki rod 18, a reiki motor 19, and a bracket 20 disposed at the center and both sides of the linear feeder 24. Each of the linear feeders 24 is attached correspondingly. This Reiki frame 21 is a ring-shaped plate, and four bosses 22 are fitted into the upper part of the two pillars 3b and the middle of the two pillars 3a out of the four pillars, respectively, and are attached by push screws 23. According to the layer thickness of the article supplied to the linear feeder 24, the push screw 23 is loosened and moved up and down to be adjusted.
[0007]
The above-mentioned agitator motor 1 is equipped with a speed reducer, and the rotating operation of the agitator 9 is turned off when 1.5 rotations are performed at a speed of 0.5 times per second, for example, and the rotation is reversed when the rotation due to inertia almost stops. The power is turned on for 1.5 rotations, and after a short stop time as described above, this operation is repeated with a normal rotation. The forward rotation time, stop time, and reversal time of the motor can be set and changed by a timer, and are adjusted by looking at the distributed supply status of articles. In the figure, the agitator 10 has two round bars with a lower end of two branches and a diameter of, for example, 3 mm to 4 mm in a 180 degree direction, but may be three or four. For example, three types of agitator 10 for 0.6 g to 1 g, 2 g to 3 g, and 4 g to 5 g are prepared and can be easily replaced by the coupling 12. Further, since the outlet of the supply feeder 6 is relatively close to the center rod of the agitator 10, the article is likely to bridge, so that the tip of the bridge breaker 11 is positioned slightly beyond the outlet of the supply feeder 6. The two round bars are projected in the 180 degree direction, but may be three or four. This bridge breaker 11 acts to scrape out the article at the exit even when the bridge phenomenon does not occur, and repeats normal rotation and reverse rotation, so during this time the article is dispersed on the dispersion feeder 8 in the order of left side, center, right side and center. It is prevented from falling off in one direction. If the articles are biased by the dispersion feeder 8, the articles fed to the linear feeder 24 are interrupted and the number of scales participating in the combination weigher is reduced, so that the combination accuracy is deteriorated or the combination is not established. Processing capacity decreases. Therefore, even if the article is supplied to the dispersion feeder 8 in an uneven manner, the article can be dispersed and fed to the linear feeder 24 while being leveled by the agitator 10.
[0008]
In this embodiment, as described in the above-mentioned problem, recently, there are many requests for a relatively small packed product with a weighing of 0.6 g to 1 g, so that dispersion control and quantitative control become more difficult. For this purpose, it is necessary to further narrow the article dropping position from the supply feeder 6, and the funnel 13 is adjusted by loosening the two support rods 14 and the nut 14 '. For example, when the article has a value that is an order of magnitude smaller than that of a normal article, such as a cutlet of skipjack, such as 0.01, the difference in volume is large even if the above-mentioned weighing is between 0.6 g and 1 g. In order to increase weighing accuracy and processing capacity, adjustments corresponding to the layer thickness of each article are required. That is, it is necessary to slightly change the layer thickness on the dispersion feeder 8 or to make the height of the lower end of the agitator 10 correspond to the change in the layer thickness. Therefore, in the adjustment in the embodiment, since the level sensor 15 and the agitator 10 directly connected to the agitator motor 1 are fixed to the motor frame 2, the adjustment can be performed simultaneously by loosening the above-described push screw 5a. In the weighing range of 0.6 g to 1 g, since the gap between the bridge breaker 11 and the supply feeder 6 has a margin in advance, the agitator 10 and the bridge breaker 11 may remain fixed. Therefore, the stirrer 9 is simultaneously adjusted by adjusting the motor frame 2 up and down. The article 7 is supplied onto the dispersion feeder 8 and further fed into the above-mentioned linearly arranged feeders 24 (in this example, 10 stations) arranged radially. In FIG. 2, the articles 7 discharged from the linear feeder 24 provided radially are once supplied to a supply hopper 25 provided in the lower part corresponding to the linear feeder 24 and then provided in the lower part thereof. The articles in the weighing hopper 26 which are supplied to the weighing hopper 26 and selected as a result of the combination calculation by the computer are discharged to the collecting chute 27 and commercialized as one pack. Therefore, the rakes 17 provided corresponding to the respective linear feeders 24 rotate at a speed of one revolution per second in the direction of the arrow, and the layers of the articles conveyed on the linear feeder 24 are leveled. The reason why the rotation direction of the reiki bar 18 and the conveyance direction of the rectilinear feeder 24 are reversed is that an extremely small amount is conveyed, so that the supply amount to the supply hopper 25 is not excessive. Again, since it is necessary to adjust the thickness of the gap between the tip of the reiki bar 18 and the tray surface of the rectilinear feeder 24, the thickness of the reiki frame 21 is adjusted by loosening the four push screws 23. Become.
[0009]
A second embodiment is shown in FIG. Since the figure is almost the same as the first embodiment, the figure is only a front view corresponding to 1B. This embodiment shows a case where the weighing is relatively large, 4 g to 5 g, and therefore the funnel 13 of the first embodiment is not necessary. Further, as shown in the figure, the bifurcated divergent portion at the lower end of the agitator 10 is larger than that of the first embodiment, and is larger than the end face of the dispersion feeder 8 so as to wrap on a part of the linear feeder 24. Is provided. In this example, since the article layer thickness in the dispersion feeder 8 and the linear feeder 24 is increased, the position of the reiki frame 21 is also adjusted to a higher position than in the first embodiment.
[0010]
【The invention's effect】
As described above, in the prior art, the apparent specific gravity is extremely small as 0.01, and especially when a combination of a small amount of weight such as 0.6 g to 1 g is used, or about 1 to 8 such as a pack of 0.6 g to 5 g. In the weighing of products with a weighing ratio, it was difficult to supply evenly distributed without variation. However, in this invention, a stirrer with a forward / reverse rotating agitator and a bridge breaker is installed on the dispersion feeder, and the above agitator is used together with the level sensor. By attaching it to the motor frame as a single unit, it is possible to easily adjust the layer thickness on the dispersion feeder only by adjusting the vertical movement of the frame, and by adding a funnel on the dispersion feeder and a reiki on the linear feeder, For packed products with an extremely small apparent specific gravity and a small capacity, it is possible to improve the accuracy of combination weighing and improve the processing capacity of one unit. It made possible by a simple adjustment at the time of weighing changes in the combined balance. Furthermore, there is no need to change the position where the tip of the supply feeder is moved closer to or away from the center of the combination weigher, and there is an effect that it is possible to respond immediately to products with a large weighing ratio.
[Brief description of the drawings]
FIG. 1 is a plan view A in a first embodiment of the present invention and a front view B taken along the line XX ′ of the plan view A. FIG.
FIG. 2 is a schematic configuration diagram of a combination weigher according to an embodiment of the present invention.
FIG. 3 is a front view of a second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Motor for agitator 2 Motor frame 3a, 3b Pillar 4a Boss 5a Press screw 6 Feed feeder 7 Article 8 Dispersion feeder 9 Stirrer 10 Agitator 11 Bridge breaker 12 Coupling 13 Funnel 14 Support rod 15 Level sensor 17 Reiki 18 Reiki rod 19 Reiki Motor 21 Reiki frame 22 Boss 23 Press screw 24 Straight feeder 25 Supply hopper 26 Weighing hopper 27 Collecting chute

Claims (2)

The article supply apparatus of the combination weigher includes a conical dispersion feeder 8 and a supply feeder 6 that is positioned above the dispersion feeder and supplies articles onto the dispersion feeder, and the articles from the supply feeder 6 are supplied to the dispersion feeder. A funnel 13 supplied on the center, an agitator 10 that is positioned at the center on the dispersion feeder 8 and that can be replaced by a crotch body having a bifurcated tip, and that repeats forward and reverse rotation, and is pivotally coaxial with the agitator 10 A bridge breaker 11 that is supported so as to repeat forward rotation and reverse rotation integrally with the agitator, and for loosening a lump of articles conveyed by the supply feeder 6 at a substantially leading end on the supply feeder tray; A motor 1 for driving the agitator 10, a motor frame 2 to which the motor is attached, and the dispersion attached to the motor frame. A level sensor 15 for detecting a layer thickness of an article on the feeder, and the supply feeder is controlled by a detection signal of the level sensor, and the motor frame is moved along a plurality of columns supported by the combination weigher main body. A distributed supply device for a combination weigher comprising a mechanism for moving up and down. In addition to the mechanism according to claim 1, in the article supply apparatus provided with a plurality of rectilinear feeders 24 provided radially at the lower part of the dispersion feeder 8, the article feeders are respectively provided corresponding to the upper part of the tray of the rectilinear feeder 24. A rotary shaft provided in parallel with the rectilinear feeder tray surface, a reiki rod 18 provided with a plurality of rods projecting radially on the rotary shaft, and a drive motor for driving the reiki rod The reiki 17 is attached to the reiki frame 21, and the reiki frame 21 is configured to be movable up and down along a plurality of columns supported by the combination weigher main body. The reiki rod 18 rotates in the rotating direction of the reiki rod 18. A distributed supply device for a combination weigher characterized in that the tip is rotated so as to be in the direction opposite to the traveling direction of the article on the linear feeder 24.

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