JP2018112429A - Combination weighing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combination weighing device capable of improving a conveyance accuracy of articles by a conveyance part.SOLUTION: A combination weighing device 1 includes: a first conveyance part 6 for conveying articles supplied from the outside along a linear conveying path; and a second conveyance path 8 for conveying the articles supplied from the first conveyance part 6 along the linear conveying path. A cross-sectional shape orthogonal to a conveyance direction of the first conveyance part 6 as viewed from the conveyance direction is asymmetrical with respect to a linear line L1 that passes a center C1 in a width direction of the first conveyance part 6, and the cross-sectional shape orthogonal to the conveyance direction of the second conveyance part 8 as viewed from the conveyance direction is asymmetrical with respect to a linear line L2 that passes a center C2 in the width direction of the second conveyance part 8. The cross-sectional shape of the first conveyance part 6 is different from the cross-sectional shape of the second conveyance part 8.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a combination weighing device.

  As a conventional combination weighing device, a first transport unit that transports articles supplied from the outside along a linear transport path, and transports articles supplied from the first transport unit along a linear transport path. In addition, there is known a device including a first transport unit and a second transport unit in which the transport direction of the article is set in the same direction. The cross-sectional shape of the 1st conveyance part and the 2nd conveyance part is exhibiting U shape, for example (for example, refer to patent documents 1).

Japanese Utility Model Publication No. 1-164218

  As an article weighed in the combination weighing device, for example, there is a rod-shaped article such as sausage. In the combination weighing device, when a rod-shaped article is conveyed, the article may be supplied one by one from the conveyance unit to the weighing hopper or the like. However, when the cross-sectional shape of the transport unit is U-shaped as in the past, for example, two articles may be transported in a state where two articles are arranged. In this case, a plurality of articles are supplied from the transport unit to the weighing hopper and the like at a time. Thereby, for example, when the supply amount of the weighing object supplied to the weighing hopper is larger than a specified amount, the weighing hopper may not participate in the combination calculation, and the operating rate of the combination weighing device is lowered. Therefore, the combination weighing device is required to improve the conveyance accuracy of the article by the conveyance unit.

  An object of one aspect of the present invention is to provide a combination weighing device that can improve the conveyance accuracy of an article by a conveyance unit.

  The combination weighing device according to one aspect of the present invention includes a first conveyance unit that conveys an article supplied from the outside along a linear conveyance path, and a linear conveyance path that conveys the article supplied from the first conveyance unit. And a cross-sectional shape perpendicular to the transport direction of the first transport unit is defined by the first transport unit and the second transport unit in which the transport direction of the article is set in the same direction. The cross-sectional shape that is asymmetric with respect to the straight line passing through the center in the width direction of the first transport unit and is orthogonal to the transport direction of the second transport unit is the width direction of the second transport unit as viewed from the transport direction. The cross-sectional shape of the first transport unit is different from the cross-sectional shape of the second transport unit.

  In the combination weighing device according to one aspect of the present invention, each of the first transport unit and the second transport unit has an asymmetric cross-sectional shape. In the combination weighing device, the cross-sectional shape of the first transport unit is different from the cross-sectional shape of the second transport unit. Thereby, for example, even when the articles are conveyed side by side in the first conveying section, the articles roll in the second conveying section when the articles are supplied to the second conveying section having a different cross-sectional shape. So that the articles can be rearranged. Therefore, in the combination weighing device, the articles can be conveyed in a line along the conveyance direction. As a result, in the combination weighing device, it is possible to improve the conveyance accuracy of the article by the conveyance unit.

  In one embodiment, each of the 1st conveyance part and the 2nd conveyance part has the lowest part where the height position becomes the lowest in the conveyance surface where an article is conveyed, and the lowest part of the 1st conveyance part is width In the direction, it is provided on one side with respect to the center, and the lowermost part of the second transport unit may be provided on the other side with respect to the center in the width direction. In this configuration, the lowermost position of the first transport unit is different from the lowermost position of the second transport unit. Articles are conveyed at the bottom. Thereby, the article supplied from the first transport unit falls to a position other than the lowermost part of the second transport unit, and moves by rolling toward the lowermost part in the second transport unit. Therefore, in the combination weighing device, the articles can be rearranged more reliably.

  In one embodiment, each of the first transport unit and the second transport unit may transport the article by vibration. In the form in which the article is conveyed by vibration, the article can be conveyed side by side. Therefore, the above configuration is particularly effective in a mode in which the first transport unit and the second transport unit transport articles by vibration.

  According to one aspect of the present invention, it is possible to improve the conveyance accuracy of an article by a conveyance unit.

FIG. 1 is a front view of a combination weighing device according to an embodiment. FIG. 2 is a side view of the combination weighing device shown in FIG. FIG. 3 is a top view of the combination weighing device shown in FIG. FIG. 4 is a block diagram showing the configuration of the combination weighing device. FIG. 5A is a diagram illustrating a cross-sectional configuration of the first transport unit, and FIG. 5B is a diagram illustrating a cross-sectional configuration of the second transport unit.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or equivalent elements will be denoted by the same reference numerals, and redundant description will be omitted.

  As shown in FIGS. 1 to 3, the combination weighing device 1 includes an article supply chute 3, a plurality of first feeders 5, a plurality of second feeders 7, a plurality of weighing hoppers 9, and a collecting chute 11. The measuring unit 20 (see FIG. 4) and the control unit 22 (see FIG. 4).

  The combination weighing device 1 measures an article supplied from the outside so as to have a target measurement value, and supplies it to a bag making packaging machine or the like (not shown). Here, the articles are articles such as agricultural products, marine products, processed foods, and the like that vary in unit mass. The bag making and packaging machine packs the articles measured and supplied by the combination weighing device 1 while forming the film into a bag having a predetermined capacity.

  The article supply chute 3 supplies articles supplied from the outside to the first feeder 5. Specifically, the article supply chute 3 supplies articles to the upstream side of the first feeder 5 in the transport direction D1 (see FIG. 2). In the present embodiment, two article supply chutes 3 are provided. As shown in FIG. 3, the article supply chute 3 extends along the arrangement direction of the plurality of first feeders 5 and is provided over the plurality of first feeders 5. Thereby, one article supply chute 3 supplies articles to the plurality of first feeders 5. As shown in FIG. 3, the article supply chute 3 is fixed to the main body 13 by a fixing member 14.

  A distance measuring sensor 4 is provided above the article supply chute 3. In the present embodiment, a plurality (four in this case) of distance measuring sensors 4 are provided. The distance measuring sensor 4 is fixed to a support frame 15 provided in the main body 13 and is located above the article supply chute 3. The distance measuring sensors 4 are arranged at a predetermined interval in the arrangement direction of the first feeders 5.

  The distance measuring sensor 4 detects the distance between the distance measuring sensor 4 and the article on the first feeder 5. One distance measuring sensor 4 can detect the distance between the articles on the plurality of first feeders 5. The distance measuring sensor 4 obtains the distance between the distance measuring sensor 4 and the article by, for example, irradiating light toward the article and receiving the light reflected by the article. The distance measuring sensor 4 outputs a detection signal indicating the distance to the detected article to the control unit 22.

  Each first feeder 5 conveys the articles supplied from the article supply chute 3 to the second feeder 7. The first feeder 5 is provided on the main body 13. The first feeder 5 has a first trough (first transport unit) 6 extending from the article supply chute 3 to the second feeder 7. Each of the first feeders 5 vibrates the first trough 6 to convey the article supplied from the article supply chute 3 toward the tip of the first trough 6 along the conveyance direction D1.

  As shown in FIG. 1, the first feeder 5 has a vibration mechanism 30. The vibration mechanism 30 applies vibration to the first trough 6. The vibration mechanism 30 has a vibration source (not shown). The vibration source includes an electromagnetic coil, a fixed iron core, and a movable iron core. In the first feeder 5, when an alternating current is supplied from the first current supply unit 24 (see FIG. 4) to the electromagnetic coil of the vibration source, an oscillating magnetic field is generated, causing the movable iron core to vibrate up and down. 6 vibrates. The operation of the first current supply unit 24 is controlled by the control unit 22.

  Each second feeder 7 conveys the articles supplied from the first feeder 5 to the weighing hopper 9. The second feeder 7 is provided on the main body 13. The second feeder 7 has a second trough (second transport unit) 8 extending from the first feeder 5 to the weighing hopper 9. Each second feeder 7 vibrates the second trough 8 to convey the article supplied from the first feeder 5 along the conveyance direction D2 (see FIG. 2) toward the tip of the second trough 8. . The conveyance direction D2 of the second feeder 7 is the same as the conveyance direction D1 of the first feeder 5.

  The second feeder 7 has a vibration mechanism 32. The vibration mechanism 32 applies vibration to the second trough 8. The vibration mechanism 32 has a vibration source (not shown). The vibration source includes an electromagnetic coil, a fixed iron core, and a movable iron core. In the second feeder 7, when an alternating current is supplied from the second current supply unit 26 (see FIG. 4) to the electromagnetic coil of the vibration source, an oscillating magnetic field is generated, and the movable iron core vibrates up and down, and the second trough 8 vibrates. The operation of the second current supply unit 26 is controlled by the control unit 22.

  Each weighing hopper 9 is disposed below the tip of the first trough 6 of each second feeder 7. The weighing hopper 9 is provided on the main body 13. A gate that can be opened and closed is provided at the bottom of each weighing hopper 9. Each weighing hopper 9 temporarily stores articles discharged from the corresponding second feeder 7 with the gate closed, and opens the gate to discharge the temporarily stored articles downward.

  The collective chute 11 is formed in a cylindrical shape having an inner surface (not shown) that tapers downward. The collective chute 11 is provided on the main body 13. The collecting chute 11 is arranged so that the inner surface is located below all the weighing hoppers 9. The collecting chute 11 receives the articles discharged from the gate side of each weighing hopper 9 on the inner surface and discharges the articles downward.

  The weighing unit 20 has a plurality of load cells (not shown). Each load cell supports a corresponding weighing hopper 9. The weighing unit 20 outputs a weighing value corresponding to the mass of the article to the control unit 22 when the article is temporarily stored in each weighing hopper 9.

  The control unit 22 is a device that controls various operations in the combination weighing device 1 and is a signal processing device including a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The control unit 22 controls the operation of each part of the combination weighing device 1 such as the conveying operation of each first feeder 5 and each second feeder 7 and the opening / closing operation of the gate of each weighing hopper 9.

  The control unit 22 stores the measurement value measured by the measurement unit 20 in association with the measurement hopper 9 in which articles corresponding to the measurement value are stored. Specifically, when the article weighed by the weighing unit 20 is stored in the weighing hopper 9, the control unit 22 stores the measured value measured by the weighing unit 20 and the article corresponding to the measured value. The weighing hopper 9 is stored in association with it.

  The control unit 22 calculates a combination of measurement values from the plurality of measurement values measured by the measurement unit 20 and associated with the plurality of measurement hoppers 9 so that the total value becomes the target value. Specifically, the control unit 22 calculates a combination of measurement values from a plurality of measurement values output by the measurement unit 20 so that the total value falls within a predetermined range with the target value as the lower limit value. Then, the control unit 22 causes the weighing hopper 9 corresponding to the combination to discharge the article.

  The control unit 22 obtains the layer thickness of the article on the first feeder 5 based on the detection signal output from the distance measuring sensor 4 (acquires the supply state of the article from the article supply chute 3 to the first feeder 5. ). The control unit 22 sets the feeding force of the first feeder 5 based on the layer thickness of the article on the first feeder 5, and controls the operation of the first feeder 5 with the feeding force. More specifically, the control unit 22 uses the first feeder 5 with a feed force obtained from the layer thickness of the article based on the distance detected by the distance measuring sensor 4 and the supply amount that is the set target supply amount. To control.

  Next, the first trough 6 of the first feeder 5 and the second trough 8 of the second feeder 7 will be described in detail.

  As shown in FIG. 3, the first trough 6 of the first feeder 5 conveys the article along a linear conveyance path. As shown in FIG. 5A, the first trough 6 of the first feeder 5 has a pair of side surfaces 6a and 6b, a first bottom surface 6c, and a second bottom surface 6d that face each other. In the present embodiment, the pair of side surfaces 6a and 6b, the first bottom surface 6c, and the second bottom surface 6d are flat surfaces. The first trough 6 includes a pair of side surfaces 6a and 6b, a first bottom surface 6c, and a second bottom surface 6d to form a space 6S in which articles are conveyed.

  The cross-sectional shape orthogonal to the transport direction D1 (see FIG. 2) of the first trough 6 passes through the center C1 in the width direction of the first trough 6 (opposite direction of the pair of side surfaces 6a and 6b) when viewed from the transport direction D1. Asymmetric with respect to the straight line L1. The first bottom surface 6c of the first trough 6 is inclined downward from the side surface 6a toward the side surface 6b. The second bottom surface 6d is inclined downward from the side surface 6b toward the side surface 6a. The first bottom surface 6c and the second bottom surface 6d intersect with each other through the connecting portion 6e and are connected to each other. The connection part 6e is the lowest part where the height position is lowest on the transport surface (the first bottom surface 6c and the second bottom surface 6d) on which articles are transported in the first trough 6.

  The length from the side surface 6a to the connection portion 6e in the first bottom surface 6c is shorter than the length from the side surface 6b to the connection portion 6e in the second bottom surface 6d. Thereby, the connection part 6e is located in the side surface 6a side with respect to the straight line L1. That is, the connecting portion 6e is located between the straight line L1 and the side surface 6a. With such a configuration, the cross-sectional shape of the first trough 6 perpendicular to the transport direction D1 is asymmetric with respect to the straight line L1 when viewed from the transport direction D1.

  As shown in FIG. 3, the second trough 8 of the second feeder 7 conveys the article along a linear conveyance path. As shown in FIG. 5B, the second trough 8 of the second feeder 7 has a pair of side surfaces 8a and 8b, a first bottom surface 8c, and a second bottom surface 8d that face each other. In the present embodiment, the pair of side surfaces 8a and 8b, the first bottom surface 8c, and the second bottom surface 8d are flat surfaces. The second trough 8 includes a pair of side surfaces 8a and 8b, a first bottom surface 8c, and a second bottom surface 8d to form a space 8S in which articles are conveyed. The distance between the pair of side surfaces 8 a and 8 b of the second trough 8 is equivalent to the distance between the pair of side surfaces 6 a and 6 b of the first trough 6.

  The cross-sectional shape orthogonal to the transport direction D2 (see FIG. 2) of the second trough 8 passes through the center C2 in the width direction of the second trough 8 (opposite direction of the pair of side surfaces 8a and 8b) when viewed from the transport direction D2. Asymmetric with respect to the straight line L2. The first bottom surface 8c of the second trough 8 is inclined downward from the side surface 8a toward the side surface 8b. The second bottom surface 8d is inclined downward from the side surface 8b toward the side surface 8a. The first bottom surface 8c and the second bottom surface 8d intersect with each other through the connection portion 8e and are connected to each other. The connection part 8e is the lowest part where the height position is lowest on the transport surface (the first bottom surface 8c and the second bottom surface 8d) on which articles are transported in the second trough 8.

  The length from the side surface 8a to the connection portion 8e in the first bottom surface 8c is shorter than the length from the side surface 8b to the connection portion 8e in the second bottom surface 8d. Thereby, the connection part 8e is located in the side surface 8b side with respect to the straight line L2. That is, the connecting portion 8e is located between the straight line L2 and the side surface 8b. With such a configuration, the cross-sectional shape orthogonal to the transport direction D2 of the second trough 8 is asymmetric with respect to the straight line L2 when viewed from the transport direction D2.

  As shown in FIGS. 5A and 5B, the cross-sectional shape of the first trough 6 is different from the cross-sectional shape of the second trough 8. The connection portion 6e of the first trough 6 is provided on one side (side surface 6a side) with respect to the center C1 in the width direction, and the connection portion 8e of the second trough 8 is relative to the center C2 in the width direction. On the other side (side 8b side). With such a configuration, the articles gathered and conveyed in the vicinity of the connection portion 6 e in the first trough 6 fall on the first bottom surface 8 c of the second trough 8. The cross-sectional shape of the first trough 6 is different from the cross-sectional shape of the second trough 8 when the connecting portion 6e of the first trough 6 is shifted to the right in the horizontal direction with respect to the center C1. This means that the portion 8e is shifted to the left in the horizontal direction with respect to the center C2. Further, when the connecting portion 6e of the first trough 6 is shifted to the left in the horizontal direction with respect to the center C1, it means that the connecting portion 8e of the second trough 8 is shifted to the right in the horizontal direction with respect to the center C2. .

  As described above, in the combination weighing device 1 according to this embodiment, the first trough 6 of the first feeder 5 and the second trough 8 of the second feeder 7 are asymmetric in cross-sectional shape. In the combination weighing device 1, the cross-sectional shape of the first trough 6 of the first feeder 5 is different from the cross-sectional shape of the second trough 8 of the second feeder 7. Thereby, for example, even when articles are conveyed side by side in the first trough 6, the articles roll in the second trough 8 when the articles are supplied to the second trough 8 having a different cross-sectional shape. So that the articles can be rearranged. Therefore, in the combination weighing device 1, the articles can be conveyed in a line along the conveyance direction. As a result, in the combination weighing device 1, it is possible to improve the conveyance accuracy of articles by the first feeder 5 and the second feeder 7.

  In the combination weighing device 1 according to the present embodiment, each of the first trough 6 and the second trough 8 has a connection portion 6e and a connection portion 8e which are the lowest portions where the height position is lowest on the conveyance surface on which the article is conveyed. Have The connection portion 6e of the first trough 6 is provided on one side (side surface 6a) with respect to the center C1 in the width direction, and the connection portion 8e of the second trough 8 is relative to the center C2 in the width direction. It is provided on the other side (side 8b side). In this configuration, the position of the connecting portion 6e of the first trough 6 and the position of the connecting portion 8e of the second trough 8 are different. The article is conveyed at the connecting portions 6e and 8e. As a result, the article supplied from the first trough 6 falls to a position other than the connecting portion 8e of the second trough 8, and moves in the second trough 8 by rolling toward the connecting portion 8e. Therefore, in the combination weighing device 1, the articles can be rearranged more reliably.

  In the combination weighing device 1 according to the present embodiment, each of the first feeder 5 and the second feeder 7 conveys an article by vibration. In the form in which the article is conveyed by vibration, the article can be conveyed side by side. Therefore, the above configuration is particularly effective in the form in which the first feeder 5 and the second feeder 7 convey articles by vibration.

  As mentioned above, although embodiment of this invention has been described, this invention is not necessarily limited to embodiment mentioned above, A various change is possible in the range which does not deviate from the summary.

  In the said embodiment, the form provided with two feeders, the 1st feeder 5 and the 2nd feeder 7, was demonstrated to an example. However, a feeder may be further provided on at least one of the upstream side of the first feeder 5 and the downstream side of the second feeder 7.

  In the above-described embodiment, an example in which the pair of side surfaces 6a and 6b, the first bottom surface 6c, and the second bottom surface 6d of the first trough 6 are planes has been described. However, the inner surface of the first trough may be curved, for example. The same applies to the second trough.

  In the embodiment described above, an example in which the layer thickness of the article on the first feeder 5 is obtained based on the detection result of the distance measuring sensor 4 and the conveyance control of the first feeder 5 is performed has been described as an example. However, for example, the conveyance control of the first feeder 5 may be performed based on an image captured by a camera or the like.

  In the embodiment described above, an example in which the number of distance measuring sensors 4 installed is smaller than that of the plurality of first feeders 5 has been described as an example. However, the distance measuring sensor may be installed corresponding to each first feeder 5. A plurality of distance measuring sensors may be provided along the conveyance direction of the first feeder 5 (second feeder 7).

  In addition to the above embodiment, a pool hopper that supplies an article from the second feeder 7 and supplies the article to the weighing hopper 9, and a booster that supplies the article from the weighing hopper 9 and supplies the article to the collecting chute 11 A hopper or the like may be further provided.

  DESCRIPTION OF SYMBOLS 1 ... Combination measuring apparatus, 6 ... 1st trough (1st conveyance part), 6c ... 1st bottom face (conveyance surface), 6d ... 2nd bottom face (conveyance surface), 6e ... Connection part (lowermost part), 8 ... 1st 2 troughs (second transport unit), 8c ... first bottom surface (transport surface), 8d ... second bottom surface (transport surface), 8e ... connecting portion (lowermost part), C1 ... center, C2 ... center, L1 ... straight line, L2 ... Straight line.

Claims (3)

A first transport unit that transports articles supplied from the outside along a linear transport path;
The article supplied from the first conveyance unit is conveyed along a linear conveyance path, and includes the first conveyance unit and a second conveyance unit in which the conveyance direction of the article is set in the same direction. ,
The cross-sectional shape orthogonal to the transport direction of the first transport unit is asymmetric with respect to a straight line passing through the center in the width direction of the first transport unit, as viewed from the transport direction,
The cross-sectional shape orthogonal to the transport direction of the second transport unit is asymmetric with respect to a straight line passing through the center in the width direction of the second transport unit when viewed from the transport direction,
The combination weighing device, wherein the cross-sectional shape of the first transport unit is different from the cross-sectional shape of the second transport unit. Each of the first transport unit and the second transport unit has a lowermost portion having a lowest height position on a transport surface on which the article is transported,
The lowermost portion of the first transport unit is provided on one side with respect to the center in the width direction,
The combination weighing device according to claim 1, wherein the lowermost portion of the second transport unit is provided on the other side with respect to the center in the width direction.   The combination weighing device according to claim 1 or 2, wherein each of the first transport unit and the second transport unit transports the article by vibration.

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