JPH0632585Y2 - Hopper with double gate for automatic weighing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a hopper with a double-opening gate having a distribution function used for a combination scale that automatically weighs an object to be measured to a predetermined target weight using a plurality of weighing machines.

<Prior Art> A conventional hopper having this type of gate is generally configured such that the lower edges of both gates are straight edges and abut against each other to close them. Some are shown in the figure. In the figure, 1 is a hopper body,
Reference numerals 2 and 3 denote gates, and 4 and 5 pivotally support the gates on the main body 1 by pivoting central axes of the gates, and 6 and 7 are driven parts which are driven by pushers or the like to open corresponding gates. Be done. The gates 2 and 3 are formed into tooth-shaped convex portions 2a and 3a by alternately cutting the lower end edges in a rectangular shape. When both gates 2 and 3 are closed, they mesh as shown in the figure, and when viewed from the front,
As shown in FIG. 7, the convex portions 2a and 3a pass through the gate surface on the opposite side and project, and are in a crossed state.

Originally, the double-opening gate controls the discharging direction of the articles inside by opening one of them and closing the other. Therefore, two receiving parts, for example, another hopper and a chute, are provided after the hopper, and are used for distributing and supplying articles to the two receiving parts 9 and 10. In the hopper with a double gate shown in FIG. 6, as shown in FIG. 7, the center 8 of the hopper is the center of the distribution, that is, the center 8 can be distributed to both sides with the boundary as the boundary. In addition, even if the lower edges of both general gates are straight edges, they are distributed to both sides with the center of the hopper as a boundary.

<Problems to be solved by the invention> In a conventional general hopper having a double-opening gate, when one gate is opened and articles are discharged to the corresponding receiving portion, the lower end edge of the closed gate receives both It is located just above the boundary of the division. When an article falls in such a state, there is no guarantee that the article will fall into the corresponding receiving portion. That is, when the article is in the form of small particles or lumps, the article supported by the opened gate tends to fall substantially vertically downward, whereas the article supported by the closed gate does not. Since it falls obliquely downward along the inner surface, if there is a collision of the articles during the fall, there is a possibility that some of the articles will fall to the receiving section on the opposite side. When such a hopper with a double-opening gate is used as a part of a combination scale, it may cause a weighing error in some cases.

In order to solve such a problem, in the hopper having the configuration shown in FIG. 6, the protrusions 2a and 3a are arranged so that the articles are dropped into the corresponding receiving portions by the amounts of the protrusions 2a and 3a projecting upward from the insides of the corresponding receiving portions. Be guided. Therefore, the probability that a part of the article will drop into the receiving section on the opposite side is lower than the above. But,
The convex portions 2a and 3a have concave portions between them, and there is still a possibility that they may drop to the receiving portion on the opposite side. Moreover, as shown in FIG. 8, when the article is a packaging candy 11, it may be temporarily caught between the convex portions 2a and 2a or between the convex portions 3a and 3a while falling, until it is separated from the gate. When the gate closes, it will not fall into the receiving part and will be caught between the lower ends of the gate. In addition, as shown in FIG. 9, confectionery marshmallows
Even with a soft lump like 12, the gate may close while being caught. When the hopper with double-opening gate or the receiving part underneath is a weighing hopper, as shown in the figure, the product may not only contact the receiving part and cause a weighing error, but also damage the product. Then, there is a problem that the commercial value decreases. It is an object of the present invention to ensure that an article in a hopper with a double-opening gate falls to a predetermined receiving portion and is not caught on the lower end portion of the gate.

<Means for Solving the Problems> The means of the present invention is inclined downward from both outer sides to the inner side so as to close the lower opening surface of the cylindrical hopper body, and the lower end edges are in contact with each other at the intermediate portion, Each has a gate that is pivotally supported by the hopper body and that opens and closes independently around that axis, and when both gates are selectively opened and closed and one gate is open, the other gate remains closed and its descending inclination In a hopper with a double-opening gate having a distribution function by restricting the discharge direction of articles in one direction, one of the gates is formed with its lower end edge uniformly extended in the inclined direction in a closed state, and its extension forming portion is formed. The vertical plane passing near the middle of the extension direction is used as the boundary of the distribution.

In this means, one gate whose lower end edge is formed to extend by a certain size is slanted halfway along the other gate from the position where the other gate abuts the lower end edge on the one gate in the closed state. It is preferable to extend downward to make surface contact.

<Operation> According to the above means, in the hopper with the double-opening gate, one of the gates has the lower end edge formed to extend, and the vertical plane passing near the middle of the extension forming portion in the extension direction serves as the sorting boundary. The extended lower end edge of one of the gates protrudes from the half of the extended portion toward the side where the articles are sorted and discharged beyond the sorting boundary surface. Further, the lower end edge of the other gate also projects beyond the sorting boundary surface to the side for sorting and discharging articles opposite to the above. Therefore, when ejecting articles in any direction, the lower end of the closed gate that regulates the ejection direction protrudes above the corresponding receiving section beyond the sorting boundary surface, so that the article on the opposite side is received. It never falls to. In addition, since the lower end edges of both gates are not particularly provided with unevenness,
The article will not be caught and therefore will not be pinched when the gate is closed.

Further, in the case where the extension forming portion of one gate is brought into surface contact with the lower edge portion of the other gate, the surface contact causes less wear when the gate is closed.

<Embodiment> An embodiment of the present invention will be described with reference to FIGS. In the figure, 21 is a hopper body, 22 is a left gate, 23 is a right gate, 24 is a left gate opening / closing mechanism, and 25 is a right gate opening / closing mechanism.

The hopper body 21 is in the shape of a rectangular tube that opens vertically, and the front and rear walls 30 and 31 are projected so as to extend downward in an inverted triangular shape.

As shown in FIGS. 1 and 2, the left gate 22 is composed of a flat plate portion 32 that closes the left half of the lower end opening of the hopper body 21, and an upright edge 33 in which the front and rear edges thereof are upright from the plate surface. The upper edges of both rising edges 33 are rotatably supported by front and rear walls 30, 31 of the hopper body 21 by a pivot 34. As shown in FIG. 3 in an enlarged manner, the lower end edge of the flat plate portion 32 is formed so as to extend obliquely downward from the position intersecting with the flat surface 35 passing through the center of the hopper body 21. The lower edge 36 is a straight edge in the front-rear direction. In the figure, θ is the inclination angle of the flat plate portion 32 with respect to the horizontal plane, which is 60 degrees in this example.

As shown in FIGS. 1 and 2, the right gate 23 is composed of a flat plate portion 42 that closes the right half of the lower end opening of the hopper body 21 and its rising edge 43, as in the case of the left gate 22. Edge 43
The upper edge of the hopper is rotatably supported by front and rear walls 30, 31 of the hopper by a pivot 44. As shown in the enlarged view of FIG. 3, the lower edge of the flat plate portion 42 is a flat surface 35 passing through the center of the hopper body 21.
It is bent at a position where it intersects with the flat plate portion 32, that is, at a position where it abuts on the flat plate portion 32, and is formed to extend diagonally downward along the flat plate portion 32 by a dimension 1/2.

As shown in FIG. 1, the left gate opening / closing mechanism 24 is located above the pivot 34 of the left gate 22 via a link 53 to a lever 52 pivotally supported by a pivot 51 on a support 50 on the right side of the hopper body 21. The roller 54 is connected to the lever 52 as a driven portion, and a tension spring 55 for biasing the lever 52 in the clockwise direction in the drawing is provided between the lever 52 and the support portion 50. When the pusher 56 pushes to the left in the figure, the left gate 22 pivots to the position 22a and opens, and when the pusher 56 is retracted, it is closed by the action of the spring 55.

The right gate opening / closing mechanism 25, as shown in FIG.
It is provided on the same side as the left gate opening / closing mechanism 24, and the hopper body
The lever 62 pivotally supported by a support shaft 60 provided on the shaft 21 is connected to the lever 62 via a link 63 at a position lower than the pivot shaft 44 of the right gate 23. The lever 62 is provided with a roller 64 as a driven portion and the lever 62. Between the 62 and the rear wall 31 of the hopper body 21, a lever 62
Is provided with a tension spring 65 that urges the roller 64 in the counterclockwise direction in the figure, and when the roller 64 is pushed to the right in the figure by the pusher 66, the right gate 23 pivots to the position 23a and opens to push the pusher. When 66 is retracted, it is closed by the action of spring 65.

The thus-configured double-opening gate hopper is used, for example, as a weighing hopper for a combination scale, and when the auxiliary hoppers 71 and 72 are arranged as receiving portions on the lower side as shown in FIG. The adjacent part of the hoppers 71, 72 becomes a distribution boundary surface 73, and the positional relationship is determined so that the boundary surface 73 coincides with the vertical plane 74 passing through the middle of the extension direction of the part formed by the size of the left gate 22. To be At this time, the smaller the distance m between the lower end of the left gate 22 and the upper edges of the auxiliary hoppers 71 and 72, the shorter the fall distance of the article until it reaches the bottom of the auxiliary hopper, and the less the damage is caused in the case of an easily chipped article. Although it is good, it is appropriate that the value of m is equal to or greater than / 2sinθ.

FIGS. 4 and 5 show the main part of another example of use, in which a hopper with a double-opening gate is used as a weighing hopper, and an auxiliary hopper 75 as a receiving part on the lower side and a collecting hopper 76 on the left outside thereof are used.
This is a configuration in which and are arranged. In the figure, 73 is a boundary surface for sorting, 74 is the vertical plane, and the same parts as in FIG. 3 are denoted by the same reference numerals.

In any of the usage examples, when the right gate 23 is opened, the articles inside are regulated by the left gate 22 and fall from a position beyond the sorting boundary surface 73, so that the inside of the auxiliary hopper 72 or the auxiliary hopper 75 can be reliably held. Is discharged inside. Figure 4 shows the right gate 23
Is open. Further, when the left gate 22 is opened, the articles inside are regulated by the right gate 23 and fall from a position beyond the sorting boundary surface 73, so that the articles are reliably discharged into the auxiliary hopper 71 or the collecting hopper 76. . Fig. 5 shows the left gate 22
Is open.

<Effect of the Invention> According to this invention, one lower end edge of the double-opening gate is formed to be extended by a certain size, and the vertical plane passing through the middle of the extension forming portion in the extension direction is used as the distribution boundary surface.
Since it is not necessary to provide another member on the lower side of the gate for assisting the sorting operation, articles are not caught on the lower end edge of the gate, and therefore, are not caught between the gates. Since the articles are surely discharged to the predetermined receiving section, they can be used in the weighing hopper or auxiliary hopper of the combination scale, and the effect of surely reducing the factors causing the weighing error can be surely obtained by the extremely simple structure, and the articles are not damaged. There is no damage due to the gate being caught between easy-to-use articles, and the hopper can be provided at a low cost.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a rear view of the same embodiment, FIG. 3 is an enlarged schematic front view of a main portion showing a usage example of the same embodiment, and FIG. In another example of use of the example, an enlarged schematic front view of a main part with the right gate opened, FIG. 5 is an enlarged schematic front view of a main part of the example with the left gate opened, and FIG. FIG. 7 is a perspective view showing an example of a hopper with a gate, FIG. 7 is a partially enlarged front view of the conventional example, and FIGS. 8 and 9 are partially enlarged front views showing a state in which the article of the conventional example is sandwiched. 21 ... Hopper body, 22, 23 ... Gate, 35 ... Plane passing through the center of the hopper body, 73 ... Sorting boundary surface, 74 ... Vertical plane passing through the middle of the gate extension forming part in the extension direction.

Claims (2)

[Scope of utility model registration request] 1. A tubular hopper body is inclined downward from both outer sides so as to close a lower opening surface thereof, and lower end edges are in contact with each other at an intermediate portion, and both outer sides are pivotally supported by the hopper body. There is a gate that can be opened and closed independently, and both gates are selectively opened and closed, and when one gate is opened, the other gate remains closed and the discharge direction of the articles is regulated in the descending inclination direction. In a hopper with a double-opening gate having a distribution function according to, one of the above-mentioned gates is formed with its lower end edge uniformly extended in the inclined direction in a closed state, and a vertical plane passing near the middle of the extension forming portion in the extension direction is formed. A hopper with a double-opening gate for an automatic weighing device, which is the boundary of the above-mentioned sorting. 2. The hopper with a double-opening gate for an automatic weighing device according to claim 1, wherein one gate has a lower end edge formed to extend by a certain dimension, and the other gate has the lower end edge in a closed state. A hopper with a double-opening gate for an automatic weighing device, which is formed to extend obliquely downward along a gate from a position where it abuts on one gate to make a surface contact.