JP4627585B2 - Distributed feeding mechanism of combination weighing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a distributed supply mechanism of a combination weighing apparatus that performs combination weighing so that a set of objects to be weighed has a predetermined weight or a predetermined quantity using measurement values of a plurality of weighing units, and in particular, a relatively long measurement object. The present invention relates to a distributed supply mechanism for a combination weighing device that handles objects.
[0002]
[Prior art]
In general, it is considered desirable to perform combination weighing in order to perform weighing at high speed and with high accuracy. In combination weighing, the weight and number of articles stored in each of a plurality of hoppers are weighed by a load cell, and a combination calculation of each weighing value is performed to select a plurality of hoppers having a weight (number) within a predetermined range. Collect items from the hopper. Thereby, an aggregate of a predetermined weight or a predetermined number of articles can be obtained.
[0003]
A measuring device for performing such combination weighing is described in Japanese Utility Model Publication No. 2-336097. Here, the article is first conveyed above the weighing device by the supply device. Next, the article is placed on the dispersion table and is radially dispersed by the vibration of the dispersion table. Then, when articles are sent to a plurality of pool hoppers that are also circumferentially arranged via a plurality of supply troughs arranged around the dispersion table, the articles are temporarily pooled there, and then the articles are transferred to each pool hopper. Is put into a weighing hopper located below. The weight of the article put into the weighing hopper is measured by a load cell provided for each weighing hopper. Based on the measured weights of the articles in each weighing hopper, a combination operation is performed to determine from which weighing hopper the article will be discharged within the allowable range or quantity. Based on the result, some of the weighing hoppers The article is discharged to the collecting chute.
[0004]
[Problems to be solved by the invention]
As described above, in the combination weighing device, articles supplied on the distribution table are distributed and fed from the distribution table to a plurality of supply troughs. Then, as each supply trough vibrates, the article is conveyed from each supply trough to the corresponding hopper.
[0005]
However, in the conventional combination weighing device, when the article is a long article such as a wiener or a long confectionery, there may be a problem in conveyance by the supply trough. For example, in the case of the structure of the conventional supply trough 130 as shown in FIGS. 5 and 6, the long article C prevents the conveyance of other articles.
[0006]
The supply trough 130 has a bottom surface 130a, first and second side surfaces 130b and 130c extending obliquely upward from the bottom surface 130a, and a cover portion 130d. The cover portion 130 d extends from the first side surface 130 b to the adjacent supply trough 130 and covers the gap between the adjacent supply troughs 130. Further, as shown in FIG. 6, the first and second side surfaces 130 b and 130 c and the cover portion 130 d rise obliquely from the root portion on the dispersion table 2 side toward the outer peripheral side, and the adjacent supply troughs 130 A sidewall serving as a boundary is formed.
[0007]
When the articles are supplied from the dispersion table 2 where the supply troughs 130 having such a structure are arranged in the circumferential direction, both ends of the long article C are caught by the rising portion of the adjacent cover part 130d. In some cases, it becomes a bridge state, preventing other articles from being introduced into the supply trough 130 (see FIGS. 5 and 6).
[0008]
In order to avoid this, as shown in FIGS. 7 and 8, the rising points of the side surfaces 230b and 230c extending from the bottom surface 230a of the supply trough 230 and the cover portion 230d are shifted to the outer peripheral side, and adjacent rising points are obtained. It is possible to increase the distance between each other. However, even in such a case, both ends of the long article C having a length of that distance may be caught by the rising portion.
[0009]
An object of the present invention is to provide a distributed supply mechanism for a combination weighing device, in which even when an object to be weighed (article) is caught on a side wall that is a boundary between adjacent supply troughs, the trouble of conveyance of the supply troughs is reduced. There is.
[0010]
[Means for Solving the Problems]
The distributed supply mechanism according to claim 1 is a distributed supply mechanism of a combination weighing device that performs combination weighing so that a set of objects to be weighed has a predetermined weight or a predetermined quantity using measurement values of a plurality of measurement units, A plurality of supply troughs and a distribution table are provided. The plurality of supply troughs are arranged adjacent to each other. These supply troughs carry the objects to be weighed substantially horizontally in the direction of the weighing section. The distribution table distributes the input objects to be measured to a plurality of supply troughs. The supply trough is provided with a side wall that forms a boundary with the adjacent supply trough. And each side wall formed in the boundary of several supply troughs which adjoin mutually and convey the same kind of to-be-measured object is the side wall shape of the 1st side wall of a certain boundary, and the 2nd side wall of the boundary adjacent to the boundary. The side wall shape is different.
[0011]
Here, the objects to be weighed input to the distributed supply mechanism are first placed on a distribution table and then distributed and input to a plurality of supply troughs. Then, the objects to be weighed put into the supply trough are conveyed to the weighing unit of the combination weighing device by the supply trough.
[0012]
And here, the shape of the adjacent side wall differs about the side wall formed in the boundary of each supply trough. That is, the side wall shape of the first side wall at a certain boundary is different from the side wall shape of the second side wall at the boundary adjacent to the boundary. Therefore, even if the object to be weighed is caught on the first side wall and the second side wall, it is rarely caught in a stable state, and the catch can be released immediately. For this reason, even when an object to be weighed is caught on the side wall, the conveyance function of the supply trough hardly deteriorates.
[0013]
In the distributed supply mechanism according to the first aspect , the first and second side walls rise from the middle toward the downstream side in the conveying direction of the supply trough. The rising position in the side wall shape of the first side wall and the rising position in the side wall shape of the second side wall are shifted in the conveying direction of the supply trough.
[0014]
Here, the rising point of the side wall where the object to be weighed is easily caught is shifted in the conveying direction of the supply trough by the adjacent side wall. For this reason, even if the object to be weighed is caught between the rising position of the first side wall and the rising position of the second side wall, the hooked state is not perpendicular to the transport direction but is inclined in the transport direction. The object to be weighed can be released when the conveying force is applied or another object to be weighed against it.
[0015]
A dispersion supply mechanism according to a second aspect is the mechanism according to the first aspect , wherein a rising angle in the side wall shape of the first side wall is different from a rising angle in the side wall shape of the second side wall.
[0016]
Here, since the rising angles of the side walls of the first and second side walls are different from each other, even if the object to be weighed is caught on both side walls, the object to be weighed is caught in an obliquely unstable state. Will be eliminated.
[0017]
A dispersion supply mechanism according to a third aspect is the mechanism according to the first or second aspect , wherein the side wall height in the side wall shape of the first side wall is different from the side wall height in the side wall shape of the second side wall.
[0018]
Here, since the height of the side wall of each of the first and second side walls is different, even if the object to be weighed is caught on both side walls, the object to be weighed is in an obliquely unstable state. Will be eliminated.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
<Overall configuration>
A combination weighing device including a distributed supply mechanism according to an embodiment of the present invention is shown in FIG. The combination weighing device 1 is a device that performs combination weighing using a measurement value of a plurality of weighing hoppers 5 so that a set of objects to be weighed has a predetermined weight or a predetermined quantity.
[0020]
The combination weighing device 1 mainly includes a conical dispersion table 2 disposed immediately below a position where an upstream supply conveyor device 90 drops an object to be weighed (hereinafter referred to as an article) such as a wiener, It comprises a supply trough group 3 arranged around, a plurality of pool hoppers 4 and weighing hoppers 5, and a collective discharge chute 6. The distributed supply mechanism includes a distributed table 2 and a supply trough group 3.
[0021]
The dispersion table 2 is an umbrella-shaped circular plate, and is vibrated by an electromagnetic vibration device 2a (see FIG. 3). The article supplied from the supply conveyor device 101 to the upper surface of the distribution table 2 moves while being distributed to the supply trough group 3 by vibration.
[0022]
Each supply trough 31, 32 (see FIG. 2) of the supply trough group 3 is vibrated by another electromagnetic vibration device 3a shown in FIG. Send it out. The supply troughs 31 and 32 are sheet metal members formed by bending a stainless steel plate.
[0023]
The pool hopper 4 receives articles from the supply trough group 3 and temporarily pools them, and opens an open / close gate provided in the lower part by a command from a control unit (not shown) to supply the articles to the weighing hopper 5.
[0024]
The weighing hopper 5 is provided below the pool hopper 4. A plurality of weighing hoppers 5 and pool hoppers 4 are arranged along the circumferential direction corresponding to the supply troughs 31 and 32. Each weighing hopper 5 has a load cell for measuring the weight of the articles in the hopper, and an opening / closing gate for dropping the articles onto the collective discharge chute 6 is provided below the load cell. .
[0025]
The collective discharge chute 6 collects articles dropped from each weighing hopper 5 and causes the articles to flow down to a subsequent apparatus such as a packaging machine.
[0026]
<Detailed configuration of supply trough>
As shown in FIGS. 2 and 3, the supply trough group 3 includes first supply troughs 31 and second supply troughs 32 that are alternately arranged. In FIG. 2, only four of the first and second supply troughs 31 and 32 arranged without a gap in the circumferential direction are illustrated, and other illustrations are omitted. The supply trough group 3 conveys the same type of article.
[0027]
The first supply trough 31 has a bottom surface 31a, a right side surface 31b and a left side surface 31c extending obliquely upward from the bottom surface 31a, and a cover portion 31d. The cover portion 31 d extends from the right side surface 31 b to the second supply trough 32 adjacent to the right, and covers the gap between the first supply trough 31 and the second supply trough 32 adjacent to the right.
[0028]
The second supply trough 32 has a bottom surface 32a, a right side surface 32b and a left side surface 32c extending obliquely upward from the bottom surface 32a, and a cover portion 32d. The cover portion 32 d extends from the right side surface 32 b to the first supply trough 31 adjacent to the right, and covers the gap between the second supply trough 32 and the first supply trough 31 adjacent to the right.
[0029]
The right side surface 31b of the first supply trough 31, the left side surface 32c of the second supply trough 32, and the cover portion 31d of the first supply trough 31 are defined as the boundary between the first supply trough 31 and the second supply trough 32 adjacent to the right. The first side wall is formed.
[0030]
The right side surface 32b of the second supply trough 32, the left side surface 31c of the first supply trough 31, and the cover portion 32d of the second supply trough 32 are formed between the second supply trough 32 and the first supply trough 31 adjacent to the right. A second side wall serving as a boundary is formed.
[0031]
As shown in FIGS. 2 and 3, the first side wall including the cover portion 31d rises outward from the vicinity of the point P1, and the second side wall including the cover portion 32d extends from the vicinity of the point P2. Standing up towards you. The rising point P1 of the first side wall is located outside the rising point P2 of the second side wall.
[0032]
As shown in FIG. 3, the rising angle of the first side wall including the cover portion 31d is larger than the rising angle of the second side wall including the cover portion 32d. And in the inclination part in the longitudinal cross-sectional view of a 2nd side wall, the side wall height is higher than the side wall height of a 1st side wall.
[0033]
<Features of combination weighing device>
In the present embodiment, the first and second side walls formed alternately at the boundary between the supply troughs 31 and 32 have different side wall shapes.
[0034]
Specifically, first, the rising points P1 and P2 of the first and second sidewalls at which articles are easily caught are shifted in the conveying direction of the supply troughs 31 and 32 (the direction from the inner peripheral side toward the outer peripheral side). For this reason, even if the article C is caught at the rising point P1 of the first side wall and the rising point P2 of the second side wall (see FIG. 2), the caught state is not a state orthogonal to the conveying direction but the conveying direction. As shown in FIG. 4, when the conveying force due to the vibration acts or another article collides with the article C, the catch of the article C is released.
[0035]
In addition, the rising angle of the first side wall is larger than the rising angle of the second side wall, and the height of the second side wall is higher than the height of the first side wall in the inclined portion of the second side wall in the longitudinal sectional view. For this reason, even if the article is caught on the inclined portions of the first and second side walls, the catch is immediately eliminated.
[0036]
[Other Embodiments]
(A)
In the above embodiment, the supply troughs 31 and 32 are arranged radially around the dispersion table 2, but the present invention is also applied to a combination weighing device in which the supply troughs are arranged in parallel to the side of the dispersion table. By doing so, it is possible to suppress problems due to catching of articles.
[0037]
(B)
In the above embodiment, the rising points of the first side wall including the cover part 31d and the second side wall including the cover part 32d are shifted in the transport direction, but the rising points of the first and second side walls are the same. The rising inclination angle and inclination range may be changed. Also in this case, the state of the article caught on the first and second side walls becomes unbalanced with the conveyance, and the caught state is immediately eliminated.
[0038]
Further, by changing the height of the first side wall and the height of the second side wall by making the rising point and the rising inclination angle the same, it is possible to eliminate the catch of the article.
[0039]
(C)
In the above embodiment, the articles are directly brought into contact with the supply troughs 31 and 32 made of sheet metal, and the plastic is used in the supply troughs 31 and 32 as disclosed in JP-A-7-71999. By installing a manufactured mesh member, it is possible to improve the breakage of the liquid containing the liquid.
[0040]
First, as shown in FIG. 9A, a plurality of round bars 33 (or square bars) are attached to the bottom surfaces 31a and 32a of the supply troughs 31 and 32, and the mesh member 71 is in contact therewith. can do. In this case, since the mesh member 71 is in a state of floating from the bottom surfaces 31a and 32a, the drainage of the liquid is improved.
[0041]
However, in the configuration shown in FIG. 9A, since the round bar 33 is attached to the bottom surfaces 31a and 32a of the supply troughs 31 and 32, the supply troughs 31 and 32 can be used with the mesh member 71 removed. Difficult and poor cleanability.
[0042]
On the other hand, when only the mesh member is floated without attaching the round bar 33, vibration for conveyance is not sufficiently transmitted to the mesh member, and the mesh member may be displaced.
[0043]
For this reason, the configuration shown in FIG. 9B is more desirable. Here, several guide bars 72 a are attached to the bottom of the mesh member 72, and no bar is attached to the supply troughs 31 and 32. When the mesh member 72 is attached to the supply troughs 31 and 32, the guide bar 72a is brought into contact with the bottom surfaces 31a and 32a of the supply troughs 31 and 32. With this configuration, since no bar material is attached to the supply troughs 31 and 32, the cleaning property is good, and the mesh member 72 can be removed and the supply troughs 31 and 32 can be used alone.
[0044]
【The invention's effect】
In the present invention, the side walls formed at the boundaries of the supply troughs are different in the shape of the adjacent side walls. Therefore, even if the object to be weighed is caught on the first side wall and the second side wall, it is caught in a stable state. There are few things, and it will be easy to get caught. For this reason, even when the object to be weighed is caught on the side wall, the conveyance function of the supply trough hardly deteriorates.
[0045]
And since the conveyance supply of the to-be-measured item to a supply trough becomes stable, the number of hoppers which participate in combination measurement increases, and the precision and capability of combination measurement improve.
[Brief description of the drawings]
FIG. 1 is a schematic view of a combination weighing device including a distributed supply mechanism according to an embodiment of the present invention.
FIG. 2 is a partial top view of a dispersion supply mechanism.
FIG. 3 is a side view of a distributed supply mechanism.
FIG. 4 is a state diagram when the catch of the article by the side wall of the dispersion supply mechanism can be released.
FIG. 5 is a partial top view of a conventional dispersion supply mechanism.
FIG. 6 is a side view of a conventional dispersion supply mechanism.
FIG. 7 is a partial top view of a mechanism obtained by improving a conventional dispersion supply mechanism.
FIG. 8 is a side view of a mechanism obtained by improving a conventional dispersion supply mechanism.
FIG. 9 is a diagram showing attachment of a mesh member to a supply trough according to another embodiment.
[Explanation of symbols]
2 Dispersion table 3 Supply trough group 4 Pool hopper 5 Weighing hopper 6 Collecting discharge chute 31 First supply trough 31b Right side surface (first side wall)
31c Left side (second side wall)
31d Cover (first side wall)
32 Second supply trough 32b Right side surface (second side wall)
32c Left side (first side wall)
32d Cover (second side wall)
P1 Point of rise of the first side wall P2 Point of rise of the second side wall

Claims (3)

A distributed supply mechanism of a combination weighing device that performs combination weighing so that a set of objects to be weighed has a predetermined weight or a predetermined quantity using measurement values of a plurality of measurement units,
A plurality of supply troughs arranged adjacent to each other to convey an object to be weighed substantially horizontally in the direction of the weighing unit;
A distributed table for distributing the input objects to be distributed to the plurality of supply troughs;
With
The supply trough is provided with a side wall that forms a boundary with an adjacent supply trough,
Each side wall formed at the boundary of the plurality of supply troughs that are adjacent to each other and convey the same type of objects to be weighed includes a side wall shape of a first side wall of a boundary and a side wall of a second side wall of the boundary adjacent to the boundary. The shape is different ,
The first and second side walls rise from the middle toward the downstream side in the conveying direction of the supply trough,
The rising position in the side wall shape of the first side wall and the rising position in the side wall shape of the second side wall are shifted in the conveying direction of the supply trough.
Distributed supply mechanism for combination weighing device. And the rising angle of the side wall shape of the first side wall, and the rising angle of the side wall shape of the second side wall are different,
The distributed supply mechanism of the combination weighing device according to claim 1 . The side wall height in the side wall shape of the first side wall is different from the side wall height in the side wall shape of the second side wall.
3. A distributed supply mechanism for a combination weighing device according to claim 1 or 2 .

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