JP6389903B2 - Combination weighing device - Google Patents

Description

  The present disclosure relates to a combination weighing device that conveys an object to be weighed using screw conveyance.

  Patent Document 1 discloses a combination weighing device. This combination weighing device is provided with detection means for detecting an abnormality in the flow of an object to be weighed at the boundary between a dispersion means constituted by, for example, a conical rotary table and a conveyance means constituted by, for example, a screw feeder, and the detection means The control means controls the dispersing means and the conveying means based on the abnormality detection of the flow of the object to be weighed. For example, when the dispersing means is a conical rotary table, such a combination weighing device changes the rotational speed and the rotational direction of the rotary table so as to transfer an object to be weighed on the edge portion of the dispersing means to a neighboring transport means. Operates to carry on. By operating in this way, even a highly sticky object that can be dispersed only by hand can be automatically dispersed.

JP 2011-209156 A

  Depending on the state of the object to be weighed, the object to be weighed stays between adjacent screw feeders. For example, when the object to be weighed has an elongated shape, the longitudinal direction part of the object to be weighed may be caught and retained between adjacent screw feeders. In addition, when the object to be weighed is meat, there are situations where a plurality of objects to be weighed are not completely separated but are connected by elongated muscle fibers or the like. In such a case, for example, such a streak is caught between adjacent screw feeders, and as a result, an object to be weighed may stay.

  In such a case, as described in the above document, a method of removing the stay by changing the rotation direction of the conical dispersion table can be considered.

  However, when a screw feeder is used, depending on the combination of the rotation direction of the dispersion table and the rotation direction of the screw feeder, even if the stagnation can be removed, as a result, from the screw feeder to the member disposed at the subsequent stage of the screw feeder. There is a problem that the supply amount cannot be suitably controlled.

  Specifically, when (1) the dispersion table rotates clockwise as viewed from the upper side in the substantially vertical direction, and (2) the screw feeder is viewed from the conveyance end side of the object to be weighed, the screw feeder Are screwed clockwise and the screw feeder itself is rotating counterclockwise. In the above case, since the screw feeder serves as a resistance to the object to be weighed, the object to be weighed is conveyed in accordance with the conveying operation of the screw feeder. That is, with such a combination of rotational directions, it is easy to control the supply amount from the screw feeder.

  However, in order to remove the object to be weighed between the screw feeders, the screw feeder operates in the same manner as described above, and the screw is rotated counterclockwise when viewed from the upper side in the vertical direction. The feeder is less likely to become a resistance to the object to be weighed. In such a case, the object to be weighed is not conveyed in conjunction with the conveying operation of the screw feeder, and moves along the trough due to its own weight. In other words, in such a case, the object to be weighed between the screw feeders can be removed, but the supply amount from the screw feeder is difficult to control.

  In view of this, the present disclosure rotates in the same rotational direction from the state in which the dispersion table and the screw feeder rotate in the opposite rotational direction in order to prevent the object to be weighed from staying between adjacent screw feeders. Provided is a combination weighing device that makes it possible to easily control the supply amount by controlling the rotational drive of the dispersion table so that the expected supply amount in each state is different even when the state is switched to .

  A first feature of the combination weighing device according to the present disclosure is a dispersion table that disperses an object to be weighed supplied from the outside, a plurality of hoppers arranged around the dispersion table, and a rotation center of the dispersion table from the rotation center to the hopper. A trough extending in a direction toward the head, a screw portion including a spiral member that is disposed in the trough and that transports an object to be weighed supplied to the trough by the dispersion table to the hopper by rotation driving, and the dispersion table and the screw portion The screw unit is wound in the first rotation direction when viewed from the conveyance end side of the object to be weighed in the trough, and the control unit When the conveyance start end side is viewed from the conveyance end side of the object to be weighed in the second rotation direction opposite to the first rotation direction, the screw portion at the rotation center of the screw portion A first rotation drive mode for rotating the dispersion table in the first rotation direction with respect to the rotation center of the dispersion table, when the rotation drive mode is executed and the lower side of the dispersion table is viewed from the upper side in the substantially vertical direction; The second rotational drive mode for rotating the dispersion table in the second rotational direction is intermittently switched and executed, and the expected supply amount from the dispersion table to the trough in the first rotational drive mode is determined in the second rotational drive mode. The main point is that it is larger than the expected supply from the distribution table to the trough.

  In addition, the second feature of the combination weighing device according to the present disclosure is that a dispersion table that disperses an object to be weighed supplied from the outside by rotation driving, a plurality of hoppers arranged around the dispersion table, and a dispersion table A trough extending in a direction from the center of rotation toward the hopper, and a screw portion that is disposed in the trough and includes a spiral-shaped member that conveys an object to be weighed supplied into the trough by a dispersion table to the hopper by rotation driving; It is provided with a control unit for controlling the rotation drive in the dispersion table and the screw unit, and the control unit controls the rotation drive in the dispersion table and the screw unit based on the transport amount of the objects to be weighed to each of the plurality of hoppers. And

  In the combination weighing device according to the present disclosure, in order to prevent the object to be weighed from staying between the adjacent screw feeders, the dispersion table and the screw feeder are rotated in the opposite rotation direction, so that the same rotation direction is obtained. Even in the case of switching to the rotating state, by controlling the rotation driving of the dispersion table, the expected supply amount in each state can be made different, so that the supply amount control can be easily performed.

It is a schematic perspective view of the combination weighing device 1 in the present embodiment. It is a schematic perspective view of the dispersion | distribution table 10 and the conveyance part 20 of the combination weighing device 1 concerning FIG. It is the partial cross section figure seen from the side which drawn the dispersion | distribution table 10 of the combination measuring device which concerns on FIG. 1, and the conveyance part 20 of the combination measuring device 1. FIG. FIG. 2 is a schematic plan view of the combination weighing device 1 according to FIG. 1 as viewed from above. It is a schematic perspective view for demonstrating the structure of the screw unit 30 in this embodiment. It is a schematic diagram for demonstrating the structure of the screw unit 30 in this embodiment. It is a figure which shows the opening part 1001, the rotation drive part 1002, and the projection part 1003 which were provided in the flame | frame 90 which attaches the screw unit 30, and the flame | frame 90. FIG. 3 is a schematic diagram for explaining the movement of an object to be weighed on a dispersion table 10. FIG. 3 is a schematic diagram for explaining the movement of an object to be weighed on a dispersion table 10. FIG. It is a figure for demonstrating the relationship between the rotational drive of the dispersion | distribution table 10, and an estimated supply amount.

  Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed descriptions of already well-known matters and repeated descriptions for substantially the same configuration may be omitted. This is to avoid the following description from becoming unnecessarily redundant and to facilitate understanding by those skilled in the art.

  In addition, the inventors provide the accompanying drawings and the following description in order for those skilled in the art to fully understand the present disclosure, and these are intended to limit the subject matter described in the claims. is not.

(Embodiment)
Hereinafter, this embodiment will be described with reference to FIGS.

  Hereinafter, the combination weighing device 1 according to the present embodiment will be described with reference to the drawings.

  FIG. 1 is a schematic perspective view of a combination weighing device 1 according to this embodiment.

  A combination weighing device 1 shown in FIG. 1 includes a dispersion table 10, a conveyance unit 20, a screw unit 30, a pool hopper 40, a weighing hopper 50, a booster hopper 60, a collective discharge chute 70, and a guide block 80.

  Hereinafter, an outline of the operation of the combination weighing device 1 will be described first.

  For convenience of explanation, when the rotation direction of the dispersion table 10 is described in the following description, the rotation axis C (see FIG. 1) extending in the vertical direction is the rotation direction when viewed from the upper side in the substantially vertical direction. Moreover, when explaining the rotation direction of the screw unit 30, it is set as the rotation direction when the conveyance start end side is seen from the conveyance termination side of the to-be-measured object in the screw unit 30. That is, the rotation direction of the screw unit 30 is set to a rotation direction based on the direction from the outer periphery of the combination weighing device 1 toward the rotation center of the dispersion table 10.

  First, an object to be weighed is conveyed to a combination weighing device 1 by a cross feeder (not shown) arranged above the combination weighing device 1. Here, the objects to be weighed are soft and sticky foods such as raw chicken. However, the object to be weighed is not limited to this, and any object may be used as long as it is difficult to carry by normal vibration conveyance.

  The object to be weighed that has been conveyed by the cross feeder is supplied to a substantially central portion of the dispersion table 10. The dispersion table 10 is driven to rotate about the rotation axis C. And the dispersion | distribution table 10 conveys the to-be-measured object supplied from upper direction toward a radial direction outer side, disperse | distributing to the circumferential direction. The objects to be weighed and conveyed by the dispersion table 10 are discharged from the outer peripheral edge of the dispersion table 10.

  Here, in order to remove the object to be weighed between the adjacent screw units 30, in other words, the object to be weighed by being caught by the guide block 80, the dispersion table 10 is rotated clockwise (in this embodiment, the first ) (Hereinafter referred to as the first rotational drive mode) and counterclockwise (second rotational direction in the present embodiment) (hereinafter referred to as the second rotational drive mode). ) And are executed intermittently. Thereby, the force is applied in different directions, and as a result, the objects to be weighed move in different directions. By this action, it is possible to suppress a phenomenon in which an object to be weighed is retained between adjacent screw units 30.

  The objects to be weighed released from the dispersion table 10 are supplied to a plurality of conveying units 20 arranged in a ring shape below the dispersion table 10. The some conveyance part 20 is extended radially from the rotation center O of the dispersion | distribution table 10 (refer FIG. 4). In other words, the plurality of transport units 20 extend radially from the center of the combination weighing device 1. Here, a guide block 80 is disposed between the adjacent conveyance units 20. The action of the guide block 80 prevents the object to be weighed from dropping between the transporting units 20. Each transport unit 20 transports the objects to be weighed supplied from the dispersal table 10 toward the pool hopper 40 that is arranged around the disperse table 10 so as to correspond to each transport unit 20. Specifically, in each transport unit 20, the object to be weighed is transported in the trough 21 by the rotational drive of the screw unit 30 disposed in the trough 21. Each transport unit 20 drops the transported object onto the pool hopper 40 by dropping it onto the pool hopper 40 disposed below the outer end of the transport unit 20 (below the outer end of the trough 21). Supply a sample.

  The pool hopper 40 temporarily holds the objects to be weighed supplied from the transport unit 20. Thereafter, the held objects to be weighed are supplied to the corresponding weighing hoppers 50, which are arranged one below the respective pool hoppers 40. In each weighing hopper 50, the weight of the object to be weighed is measured by a weighing mechanism (not shown). The objects to be weighed discharged from the weighing hoppers 50 are accommodated in the corresponding booster hoppers 60 arranged one below the weighing hoppers 50 and temporarily held.

  The controller (not shown) of the combination weighing device 1 matches the target weight in the allowable range of weight combinations based on the weight of the objects to be weighed in the weighing hopper 50 and the booster hopper 60, or Find the closest hopper combination by calculation. The objects to be weighed in the hopper included in the combination obtained by the calculation by the controller are discharged to the collective discharge chute 70. The objects to be weighed discharged to the collective discharge chute 70 are supplied to a downstream process (not shown).

(1; Explanation of each component in the combination weighing device 1)
Hereinafter, the dispersion table 10, the conveyance unit 20, the pool hopper 40, the weighing hopper 50, and the booster hopper 60 in the combination weighing device 1 will be described with reference to the drawings.

  FIG. 2 is a schematic perspective view of the dispersion table 10 and the conveyance unit 20 of the combination weighing device 1 according to FIG. In FIG. 2, the state where the guide block is removed is drawn.

  FIG. 3 is a partial cross-sectional view of the dispersion table 10 of the combination weighing device and the conveyance unit 20 of the combination weighing device 1 shown in FIG. In FIG. 3, the front side of the concave groove portion of the trough 21 of the transport unit 20 is not illustrated. About the holder of the screw unit 30 of the conveyance part 20, sectional drawing is drawn.

  FIG. 4 is a schematic plan view of the combination weighing device 1 according to FIG. 1 as viewed from above. In FIG. 4, a state in which the distribution table 10 has been removed is drawn. Only the position of the outer edge of the dispersion table 10 is drawn with a two-dot chain line.

  The dispersion table 10 is a member that disperses an object to be weighed supplied from a cross feeder (not shown) disposed above the combination weighing device 1. The dispersion table 10 supplies the dispersed objects to be weighed to the transport unit 20.

  Moreover, the dispersion | distribution table 10 is a member formed in a substantially circular shape in planar view. The dispersion table 10 includes a conical part 11 disposed at the center and a peripheral part 12 disposed on the periphery of the conical part 11 (see FIG. 2). The conical part 11 and the peripheral part 12 are both inclined so that the peripheral side of the dispersion table 10 is lowered (see FIG. 3). The inclination of the cone part 11 is formed steeper than the inclination of the peripheral edge part 12 (see FIG. 3).

  The dispersion table 10 is supported by a drive shaft (see FIG. 3) disposed below the dispersion table 10. The drive shaft that supports the dispersion table 10 is connected to the dispersion table motor 101. When the dispersion table motor 101 is driven by the control unit 102, the dispersion table 10 is rotationally driven around the rotation axis C extending in the vertical direction.

  Details regarding a method of controlling the rotational drive of the dispersion table 10 by the control unit 102 will be described later.

  When an object to be weighed is supplied from a cross feeder (not shown) disposed above the combination weighing device 1 to the vicinity of the center of the dispersion table 10 that is rotationally driven by a dispersion table motor, the dispersion table 10 is controlled. The rotational drive is controlled by the unit 102, and the supplied object to be weighed is conveyed outward in the radial direction while being dispersed in the circumferential direction by centrifugal force. The objects to be weighed and transported by the dispersion table 10 are discharged from the outer peripheral edge of the dispersion table 10 and fall into the trough 21 (see FIG. 2) of any of the transport units 20.

  The transport unit 20 is a member that transports an object to be weighed supplied from the dispersion table 10. The combination weighing device 1 in the present embodiment has 14 transport units 20. However, the quantity of the conveyance part 20 is an illustration, Comprising: It is not limited to this. For example, a configuration including 18 transport units 20 or a configuration including 24 transport units 20 may be employed.

  The some conveyance part 20 is arrange | positioned so that the dispersion | distribution table 10 may be surrounded below the dispersion | distribution table 10 (refer FIG. 2). The plurality of transport units 20 extend radially from the periphery of the dispersion table 10 toward the pool hopper 40 disposed around the dispersion table 10 in plan view (see FIG. 4).

  More specifically, the plurality of transport units 20 extend radially from the space below the dispersion table 10 (see FIG. 4) toward the pool hopper 40 disposed around the dispersion table 10. One weighing hopper 50 corresponding to the pool hopper 40 is provided below each pool hopper 40 (see FIG. 1). That is, the transport unit 20 extends radially from the periphery of the dispersion table 10 toward the weighing hopper 50 disposed around the dispersion table 10. The transport unit 20 transports the objects to be weighed dispersed by the dispersion table 10 toward the weighing hopper 50 (in the transport direction D shown in FIG. 3).

  Each conveyance part 20 mainly has the trough 21 and the screw unit 30 (refer FIG. 2). The screw unit 30 is disposed in the trough 21.

  The trough 21 extends from the space below the dispersion table 10 toward the pool hopper 40 corresponding to the trough 21 (see FIGS. 3 and 4). Each trough 21 extends in the radial direction with respect to the rotation center O of the dispersion table 10 in plan view (see FIG. 4). The troughs 21 included in each of the plurality of transport units 20 extend radially from the dispersion table 10 as a whole (see FIG. 4).

  Each trough 21 is separated from the internal space of the frame 90 by the upstream side wall 91 (see FIG. 3). The frame 90 is disposed below the distribution table 10 and supports the distribution table 10. Further, the frame 90 is provided with an opening 1001 into which the screw unit 30 is inserted, and accommodates at least a rotation driving unit 1002 (described later) that transmits driving force to the screw unit 30 in the internal space of the opening 1001 (FIG. 3). reference). The rotation drive unit 1002 is connected to a motor provided in the apparatus main body, and rotates about a rotation axis D shown in FIG. 3 in conjunction with the drive of the motor.

  Each trough 21 includes a concave groove portion 22 extending from the upstream side wall portion 91 and having an inner surface 22a curved in a semicircular shape (see FIG. 2). The recessed groove portion 22 is formed in a groove shape recessed downward by an inner surface 22a curved in a semicircular shape. In plan view, the concave groove 22 of each trough 21 extends from the upstream side wall 91 to the pool hopper 40 outward in the radial direction with respect to the rotation center O of the dispersion table 10. The concave groove portion 22 is inclined so that its outer edge side is lower, in other words, the pool hopper 40 side is lower than the dispersion table 10 side (see FIG. 3).

  An object to be weighed discharged from the outer peripheral edge of the dispersion table 10 is supplied to the trough 21.

  The object to be weighed supplied to the trough 21 is transported to the pool hopper 40 by the rotational drive of the screw unit 30 disposed in the trough 21. More specifically, the screw unit 30 conveys the object to be weighed toward the pool hopper 40 by rotating the screw member 31 disposed on the trough 21.

  One screw unit 30 is disposed on each trough 21 (see FIG. 4). The object to be weighed that has dropped onto the trough 21 is conveyed through the trough 21 by the rotational drive of the screw unit 30. The configuration of the screw unit 30 will be described later.

  The rotational drive in the screw unit 30 is controlled by the control unit 102.

  One pool hopper 40 is provided below the outer edge side of each trough 21. The pool hopper 40 accommodates and temporarily holds an object to be weighed that has been transported by the transport unit 20. The pool hopper 40 supplies the temporarily held object to the weighing hopper 50 provided below the pool hopper 40 by opening an opening / closing gate (not shown) provided at the lower part of the pool hopper 40.

  The weighing hopper 50 is an example of a weighing unit. The weighing hopper 50 is disposed around the dispersion table 10. Specifically, one weighing hopper 50 is provided below each pool hopper 40. In other words, one weighing hopper 50 is provided below the outer edge side of the trough 21 of each transport unit 20. The weighing hopper 50 accommodates the objects to be weighed supplied from the pool hopper 40 and temporarily holds them. The weighing hopper 50 supplies the temporarily held object to the booster hopper 60 provided below the weighing hopper 50 by opening an opening / closing gate (not shown) provided at the lower portion of the weighing hopper 50. To do.

  Each weighing hopper 50 includes a weighing device (not shown) that measures the weight of an object to be weighed in the weighing hopper 50. The weighing device is, for example, a load cell. The weighing result of the weighing device is transmitted to a controller (not shown) of the combination weighing device 1.

  One booster hopper 60 is provided below each weighing hopper 50. The booster hopper 60 is configured to receive and temporarily hold an object to be weighed supplied from the weighing hopper 50. The booster hopper 60 supplies the temporarily held objects to the collective discharge chute 70 provided below the booster hopper 60 by opening an opening / closing gate (not shown) provided at the lower part of the booster hopper 60. To do. When the booster hopper 60 receives the supply of the object to be weighed from the weighing hopper 50, the object to be weighed can be moved by the booster hopper 60 by opening an open / close gate (not shown) provided at the lower part of the booster hopper 60. It is possible to supply to the collective discharge chute 70 without holding it once.

(2-1: Specific configuration of screw unit 30)
Hereinafter, the configuration of the screw unit 30 will be described with reference to the drawings.

  FIG. 5 is a schematic perspective view for explaining the structure of the screw unit 30 in the present embodiment.

  FIG. 6 is a schematic diagram for explaining the structure of the screw unit 30 in the present embodiment.

  FIG. 6 is a diagram in which the outer diameter member 32 is cut along a predetermined plane, and is drawn so that the relationship between the groove cam provided in the inner diameter member 33 and the outer diameter member 32 disposed around the groove cam can be understood. Has been.

  FIG. 7 is a view showing a frame 90 to which the screw unit 30 is attached, an opening 1001 provided in the frame 90, a rotation driving unit 1002, and a protrusion 1003.

  As shown in FIG. 3, the screw unit 30 is attached in an opening 1001 formed in the frame 90 by the user.

  Here, the opening 1001 has a hole-like structure formed in the frame 90. Inside the opening 1001, a rotation driving unit 1002 connected to a motor is disposed.

  The rotation drive unit 1002 is connected to a motor (not shown), and rotates around a rotation axis D shown in FIG. 3 by driving the motor. The rotation axis D is a rotation axis that is set substantially the same as the insertion direction in which the screw unit 30 is inserted into the opening 1001.

  Further, a protrusion 1003 is formed at the end of the rotation drive unit 1002 (see FIG. 7). The protrusion 1003 rotates around the rotation axis D in conjunction with the rotation of the rotation driving unit 1002. The protrusion 1003 fits with the groove cam formed on the inner diameter member 33 and can move while sliding on the groove cam.

  As shown in FIG. 5, the screw unit 30 (screw portion) mainly includes a screw member 31, an outer diameter member 32, and an inner diameter member 33.

  As shown in FIG. 3, the screw member 31 includes at least a linear member 31a formed in a spiral shape. However, the linear member 31b may be further included. In the present embodiment, the screw member 31 is described as including a linear member 31a and a linear member 31b as spiral members as shown in FIG.

  As shown in FIG. 5, the linear member 31 a and the linear member 31 b are members wound clockwise around the rotation center O of the screw member 31 (in the first embodiment, the first rotational direction). In other words, the linear member 31a and the linear member 31b are left-handed screw members.

  Here, the linear member 31b is a member extending in the same direction as the linear member 31a, and does not physically intersect the linear member 31a. The cross-sections of the linear members 31a and 31b may be a perfect circle. Moreover, you may comprise by polygonal cross-sections, such as square shape. In the case of a polygonal shape, so-called corners are formed on the linear member, so that the ability to carry the object to be measured is improved.

  The screw member 31 is connected to the inner diameter member 33, and the screw member 31 also rotates in conjunction with the rotation of the inner diameter member 33. That is, when the rotation driving unit 1002 illustrated in FIG. 6 rotates, the inner diameter member 33 rotates in the same direction as the rotation of the rotation driving unit 1002. When the inner diameter member 33 rotates, the screw member 31 connected to the inner diameter member 33 rotates. The object to be weighed is transported in the trough and carried to the pool hopper 40 as the screw member 31 rotates.

  Specifically, when the rotation driving unit 1002 rotates counterclockwise, the screw member 31 also rotates counterclockwise. Here, the linear member 31a and the linear member 31b are clockwise, in other words, left-handed members. Therefore, when the screw member 31 rotates counterclockwise, the object to be weighed is conveyed from the conveyance start end shown in FIG. 5 toward the conveyance end.

  The outer diameter member 32 is a cylindrical member that is joined to the screw member 31. Furthermore, since the inner diameter member 33 is disposed inside the outer diameter member 32, the outer diameter member 32 has a donut shape in cross section. Further, the outer diameter member 32 is arranged around the inner diameter member 33 via a bearing or the like, and is configured to have little influence on the rotation operation of the inner diameter member 33. That is, the outer diameter member 32 is configured not to rotate by receiving the rotational force even when the inner diameter member 33 rotates.

  The inner diameter member 33 is a cylindrical member connected to the screw member 31. And since the rotation drive part 1002 and the protrusion part 1003 are inserted in the inside of the internal diameter member 33, the cross section becomes donut shape. The inner diameter member 33 is disposed in a space formed inside the outer diameter member 32. Further, the inner diameter member 33 is fitted with the protruding portion 1003 and has a groove cam on which the protruding portion 1003 slides from the fitted state. This groove cam is a groove cam in which a groove is formed in a spiral shape. Specifically, the groove cam has a groove formed in a spiral shape from a starting point of a portion of the inner diameter member 33 that fits with the protrusion 1003. As the protrusion 1003 moves while sliding with respect to the groove cam, the inner diameter member 33 is inserted into the main body.

  Here, for convenience of explanation, when the screw unit 30 is attached to the main body, a portion that first fits with the protruding portion 1003 is referred to as a first groove cam portion. Further, a portion in which the protrusion 1003 moves while sliding from the state in which the protrusion 1003 is fitted to the first groove cam portion is referred to as a second groove cam portion.

  The first groove cam portion and the second groove cam portion are formed physically continuously. That is, the protrusion 1003 can slide and move on the second groove cam portion as it is after sliding and moving on the first groove cam portion. However, in order to move the protrusion 1003 from the first groove cam portion to the second groove cam portion or from the second groove cam portion to the first groove cam portion, the user needs to change the direction of the force applied to the screw unit 30. There is.

  More specifically, the switching portion between the first groove cam portion and the second groove cam portion is preferably discontinuous in the direction in which the protrusion 1003 slides and moves. Specifically, the first groove cam portion has a groove cam formed in the same direction as the rotation axis D, whereas the second groove cam portion is a groove formed spirally with respect to the outer periphery of the inner diameter member 33. It becomes a cam.

  By configuring in this way, the operation when fitting the protrusion 1003 into the first groove cam portion and the operation when moving the protrusion 1003 while sliding on the first groove cam portion and the second groove cam portion. Can be different. In addition, when the protrusion 1003 is fitted into the first groove cam portion, the user may apply a force in the same direction as the rotation axis D. Therefore, even if it is difficult for the user to see the attachment portion between the protrusion 1003 and the first groove cam portion, the user can intuitively fit the screw unit 30 into the protrusion 1003.

  The configurations of the first groove cam portion and the second groove cam portion are not limited to those described above, and any configuration may be used as long as the force applied to the screw unit 30 by the user is changed. It doesn't matter.

(2-2: Regarding control method of distributed table by control unit 102)
Hereinafter, a method for controlling the distribution table 10 by the control unit 102 will be described with reference to the drawings.

  8 and 9 are schematic diagrams for explaining the movement of the object to be weighed on the dispersion table 10. For convenience of explanation, the relationship between the distribution table 10 and the guide block 80 is described as a diagram, and other components other than the distribution table 10 and the guide block 80 are omitted. In the actual product, at least the screw unit 30 is disposed between the guide blocks 80, and the object to be weighed supplied from the dispersion table 10 is conveyed.

  Hereinafter, for convenience of explanation, as shown in FIG. 8 and FIG. 9, the side surface on the right side of the guide block 80 is the first side surface when viewed from the conveyance end of the object to be weighed in the screw unit 30 toward the conveyance start end. Conversely, the side surface on the left side of the guide block 80 is defined as the second side surface.

  The control unit 102 controls the rotational drive of the dispersion table 10 in order to prevent the object to be weighed from staying between the adjacent screw units 30. Specifically, the control unit 102 intermittently switches between a first rotational drive mode in which the dispersion table 10 is rotationally driven clockwise and a second rotational drive mode in which the dispersion table 10 is rotationally driven counterclockwise.

  At this time, the controller 102 determines that the expected supply amount of the object to be weighed supplied from the dispersion table 10 in the first rotation drive mode into the trough 21 (that is, the screw unit 30, the same applies hereinafter) in the second rotation drive mode. The respective rotational drive modes in the dispersion table 10 are controlled so as to result in a larger amount than the expected supply amount of the objects to be weighed supplied from the dispersion table 10 to the screw unit 30.

  Here, the expected supply amount is, for example, a value indicating the supply amount until the predetermined rotation drive mode is switched to a different rotation drive mode. For example, in the above embodiment, the supply amount is the predicted supply amount that the dispersion table 10 supplies to the screw unit 30 before switching from the first rotation drive mode to the second rotation drive mode. Note that the predicted supply amount is not limited to the above-described configuration, and may be the predicted amount supplied from the dispersion table 10 to the screw unit 30 per unit time. In short, any predicted supply amount in the present embodiment may be used as long as it is a predicted supply amount from the dispersion table 10 to the screw unit 30 based on a predetermined standard.

  The expected supply amount may be a value directly set by the user for the control unit 102. In this case, the control unit 102 controls the rotational driving operation of the dispersion table 10 with respect to the set expected supply amount.

  Further, the expected supply amount is not a value set for the control unit 102, but the driving time, angular velocity, angular acceleration, etc. in the distribution table 10 used when the control unit 102 rotates the distribution table 10. It may be a supply amount that a user empirically recognizes from a parameter related to rotation driving. For example, when adjusting only the driving time among the parameters related to the rotational driving of the dispersion table 10, the user generally recognizes that the longer the driving time, the larger the expected supply amount. In short, as a result, the expected supply amount in the first rotation drive mode only needs to be larger than the expected supply amount in the second rotation drive mode. That is, the control unit 102 may be operated so as to achieve the above result based on the expected supply amount set by the user or the device itself, and the above result is obtained by setting the control parameter related to the rotational drive by the user. You may make it operate so that.

  Hereinafter, a method of rotational driving by the control unit 102 will be described.

  For example, the control unit 102 or the user increases the drive time of the dispersion table 10 in the first rotation drive mode to increase the expected supply amount in the first rotation drive mode more than the expected supply amount in the second rotation drive mode. You may set longer than the drive time of the dispersion | distribution table 10 in 2 rotation drive mode.

  For example, the control unit 102 or the user increases the angular acceleration of the dispersion table 10 in the first rotation drive mode to increase the expected supply amount in the first rotation drive mode more than the expected supply amount in the second rotation drive mode. You may set faster than the angular acceleration of the dispersion | distribution table 10 in 2 rotation drive mode.

  For example, the control unit 102 or the user sets the angular velocity of the dispersion table 10 in the first rotational drive mode to the second rotational speed in order to make the expected supply amount in the first rotational drive mode larger than the expected supply amount in the second rotational drive mode. You may set faster than the angular velocity of the dispersion | distribution table 10 in rotation drive mode.

  The control unit 102 or the user may be configured to control by changing two or more control parameters related to the rotational drive of the dispersion table 10.

  FIG. 10 is a diagram for explaining the relationship between the rotational drive of the dispersion table 10 and the expected supply amount.

  In FIG. 10, the vertical axis indicates the angular velocity in the dispersion table 10. The horizontal axis indicates time. Therefore, the slope of the graph shown in FIG. 10 indicates the angular acceleration of the dispersion table 10. Here, in the graph of FIG. 10, the clockwise movement of the distribution table 10 is displayed as positive, and conversely, the counterclockwise movement of the distribution table 10 is displayed as negative. That is, in the graph shown in FIG. 10, a region where the vertical axis is positive indicates a state in which the operation is performed in the first rotation drive mode. On the other hand, in the graph shown in FIG. 10, the region where the vertical axis is negative indicates a state in which the operation is performed in the second rotation drive mode.

  When expressed in this way, the expected supply amount from the dispersion table 10 to the screw unit 30 can be considered as the area of the shaded portion shown in FIG.

  Specifically, the expected supply amount until the first rotation drive mode is switched to the second rotation drive mode can be expressed as the area of the shaded portion from time 0 to t1 shown in FIG. Further, the expected supply amount from when the second rotational drive mode is switched to the first rotational drive mode can be expressed as the area of the shaded portion from time t1 to time t2 shown in FIG.

  At this time, the control unit 102 or the user compares the two areas so that the area in the first rotation drive mode is smaller than the area in the second rotation drive mode. Change at least one of them.

  Note that, as shown in FIG. 10B, a configuration may be adopted in which a third rotational drive mode in which the angular velocity of the dispersion table 10 is 0 when switching from the first rotational drive mode to the second rotational drive mode. In this case, since the load with respect to the rotating shaft of the dispersion | distribution table 10 can be reduced, the aged deterioration in an apparatus can be suppressed.

(3; Summary)
The combination weighing device 1 in this embodiment includes a dispersion table 10 that disperses an object to be weighed supplied from the outside, a plurality of pool hoppers 40 arranged around the dispersion table 10, and a rotation center O of the dispersion table 10. And the trough 21 extending in the direction of the pool hopper 40, and the object to be weighed supplied to the inside of the trough 21 (that is, the screw unit 30) by the dispersion table 10 to the pool hopper 40 by rotation driving. A screw unit 30 including a spiral-shaped member to be conveyed, and a control unit 102 that controls rotational driving in the dispersion table 10 and the screw unit 30 are provided.

  Furthermore, the screw unit 30 is wound in a first rotation direction (for example, clockwise) when the conveyance start end side is viewed from the conveyance termination end side of the object to be weighed.

  In addition, when the control unit 102 looks at the conveyance start end side from the conveyance end side of the object to be weighed, the control unit 102 moves the screw unit 30 in the second rotation direction (for example, counterclockwise) opposite to the first rotation direction. When the drive mode for rotating the screw unit 30 to the rotation center O is executed and the lower side of the dispersion table 10 is viewed from the upper side in the substantially vertical direction, the (1) first A first rotation drive mode for rotating the dispersion table 10 in the rotation direction and (2) a second rotation drive mode for rotating the dispersion table in the second rotation direction are intermittently switched and executed.

  Here, the expected supply amount from the dispersion table 10 to the screw unit 30 in the first rotation drive mode is larger than the expected supply amount from the dispersion table 10 to the screw unit 30 in the second rotation drive mode.

  In the present embodiment, the first rotation direction is described as being clockwise. On the other hand, the second rotation direction is described as being counterclockwise, which is the rotation direction opposite to the first rotation direction.

  Here, when the dispersion table 10 rotates clockwise, the objects to be weighed on the dispersion table 10 are supplied as shown in FIG. 8A to FIG. 8B. That is, the objects to be weighed on the dispersion table 10 are supplied from the dispersion table 10 in the first side surface direction of the guide block 80. At this time, since the screw unit 30 rotates counterclockwise as described above, the linear member 31a and the linear member 31b in the screw unit 30 provide resistance to the object to be weighed. This is because the screw member 31a and the screw member 31b in the screw unit 30 are formed as left-handed screws as described above, and the screw unit 30 itself is driven to rotate counterclockwise. As a result, the object to be weighed is transported in the trough 21 in conjunction with the rotational drive of the screw unit 30.

  Conversely, when the dispersion table 10 rotates counterclockwise, the objects to be weighed on the dispersion table 10 are supplied as shown in FIGS. 9A to 9B. That is, the objects to be weighed on the dispersion table 10 are supplied from the dispersion table 10 in the second side surface direction of the guide block 80. At this time, since the screw unit 30 rotates counterclockwise as in the case where the dispersion table 10 rotates clockwise, the linear member 31a and the linear member 31b in the screw unit 30 are attached to the object to be measured. Does not become resistance. This is because the linear member 31a and the linear member 31b in the screw unit 30 are formed as left-handed screws as described above, and the screw unit 30 itself is driven to rotate counterclockwise. As a result, at least a part of the objects to be weighed is not interlocked with the rotational drive of the screw unit 30, slides in the trough 21 by its own weight, and is supplied to the pool hopper 40.

  As described above, depending on the relationship between the rotation direction of the dispersion table 10 and the winding method and rotation direction of the screw unit 30, the amount of supply from the screw unit 30 to the pool hopper 40 can be controlled only by controlling the rotation drive of the screw unit 30. It cannot be controlled favorably. That is, when the linear member 31a and the linear member 31b in the screw unit 30 are left-handed screw mechanisms, the supply amount from the screw unit 30 to the pool hopper 40 can be reduced if the dispersion table 10 and the screw unit 30 have different rotational directions. Easy to control. On the contrary, if the dispersion table 10 and the screw unit 30 are in the same rotational direction, it becomes difficult to control the supply amount from the screw unit 30 to the pool hopper 40.

  Therefore, as described in this embodiment, by controlling the expected supply amount from the dispersion table 10 to the screw unit 30 in accordance with the rotation direction of the dispersion table 10, the screw unit It is possible to easily control the supply amount from 30 to the pool hopper 40.

  Preferably, the operation time in the first rotation drive mode is set longer than the operation time in the second rotation drive mode.

  By configuring as described above, for example, the area of the shaded portion shown in FIG. 10A or FIG. 10B can be increased. Thus, for example, if the control parameters other than the operation time are the same among the control parameters in the first rotation drive mode and the second rotation drive mode, the expected supply amount in the first rotation drive mode is changed to the value in the second rotation drive mode. More than expected supply.

  As a result, the screw unit 30 can be transferred to the pool hopper 40 while suppressing the stay of the object to be weighed by controlling or changing the operation time in the first rotation drive mode and the second rotation drive mode without performing complicated control. Can be easily controlled.

  Preferably, the angular velocity of the dispersion table in the first rotational drive mode is set faster than the angular velocity in the second rotational drive mode.

  By configuring as described above, for example, the area of the shaded portion shown in FIG. 10A or FIG. 10B can be increased. Thus, for example, if the control parameters other than the angular velocity are the same among the control parameters in the first rotation drive mode and the second rotation drive mode, the expected supply amount in the first rotation drive mode is changed to the expected value in the second rotation drive mode. More than the supply amount.

  Thereby, without controlling complicatedly, only the angular velocity in the first rotation drive mode and the second rotation drive mode is controlled or changed, and the stay of the object to be weighed is suppressed and the pool hopper 40 is moved from the screw unit 30 to the pool hopper 40. It is easy to control the supply amount.

  Preferably, the angular acceleration of the dispersion table in the first rotational drive mode is set faster than the angular acceleration in the second rotational drive mode.

  By configuring as described above, for example, the area of the shaded portion shown in FIG. 10A or FIG. 10B can be increased. Thus, for example, if the control parameters other than the angular acceleration are the same among the control parameters in the first rotational drive mode and the second rotational drive mode, the expected supply amount in the first rotational drive mode is More than expected supply.

  As a result, the screw unit 30 can be transferred to the pool hopper 40 while suppressing the stay of the object to be weighed only by controlling or changing the angular acceleration in the first rotation drive mode and the second rotation drive mode without performing complicated control. Can be easily controlled.

  Preferably, the control unit 102 has a third rotation drive mode in which the rotation of the dispersion table 10 is stopped, and executes the third rotation drive mode when switching between the first rotation drive mode and the second rotation drive mode.

  By configuring as described above, it is possible to reduce the load on the rotating shaft of the dispersion table 10, and thus it is possible to suppress the aging deterioration in the apparatus.

  In the present embodiment, the operation of rotating the screw unit 30 counterclockwise has been described. However, when the dispersion table 10 and the screw unit 30 are driven to rotate counterclockwise, the control unit 102 expects that the amount of objects to be weighed supplied from the screw unit 30 to the pool hopper 40 will increase. It is also conceivable to stop or reversely rotate the rotation of the unit 30.

  In the present embodiment, the rotational driving of the dispersion table 10 is intermittently switched between the first rotational driving mode and the second rotational driving mode. However, even if such intermittent switching is performed, the screw unit 30 performs the operation. More detailed control is possible because the expected supply can be adjusted. Thereby, it is possible to easily control the supply amount from the screw unit 30 to the pool hopper 40 in the apparatus.

  As described above, the embodiments have been described as examples of the technology in the present disclosure. For this purpose, the accompanying drawings and detailed description are provided.

  Accordingly, among the components described in the accompanying drawings and the detailed description, not only the components essential for solving the problem, but also the components not essential for solving the problem in order to illustrate the above technique. May also be included. Therefore, it should not be immediately recognized that these non-essential components are essential as those non-essential components are described in the accompanying drawings and detailed description.

  For example, the shape of the distribution table 10 is not limited to the shape in the above embodiment, and the distribution table 10 having a uniform gradient can also be used. That is, any shape of the distribution table 10 may be used.

  Moreover, although the guide block 80 is configured to be removable, a configuration in which it is integrally formed with the trough 21 is also conceivable.

  In addition, the inner surface 22a of the concave groove may be configured without an inclination.

  Furthermore, in the said embodiment, although the combination weighing | measuring apparatus 1 which has the booster hopper 60 was demonstrated, the apparatus which does not have the booster hopper 60 is also considered.

(Example of change)
Hereinafter, a modified example of the combination weighing device 1 in the above-described embodiment will be described by focusing on differences from the combination weighing device 1 in the above-described embodiment.

  In the combination weighing device 1 according to this modification, the control unit 102 transfers the object to be weighed to each of a plurality of hoppers (for example, each of the pool hopper 40, each of the weighing hopper 50, each of the booster hopper 60, etc.). Based on the above, the rotational drive in the dispersion table 10 and the screw unit 30 is controlled.

  For example, when the control unit 102 determines that the weight of the object to be weighed by each weighing hopper 50 does not satisfy a desired condition, the controller 102 controls the rotational drive in the dispersion table 10 or the screw unit 30 to perform the desired operation. It may be configured to satisfy the condition.

  Moreover, since the above-mentioned embodiment is for demonstrating the technique in this indication, a various change, replacement, addition, abbreviation, etc. can be performed in a claim or its equivalent range.

  The present disclosure is applicable to a combination weighing device that uses a dispersion table that is rotationally driven and screw conveyance. Specifically, the present disclosure can be applied to an apparatus used for combination weighing such as a raw lever.

DESCRIPTION OF SYMBOLS 1 Combination measuring device 10 Dispersion table 20 Conveyance part (conveyance means)
21 trough 22 concave groove 22a inner surface of concave groove (surface facing trough screw member)
30 Screw unit 31 Screw member 31a Linear member 31b Linear member 40 Pool hopper 50 Weighing hopper (measuring means)
60 Booster Hopper 70 Collective Discharge Chute 80 Guide Block C Rotating Axis of Dispersing Table 10 D Transport Direction of Transport Unit (Transport Direction of Transport Unit)

Claims (5)

A dispersion table that disperses an object to be weighed supplied from the outside by rotational driving;
A plurality of hoppers arranged around the dispersion table;
A trough extending in a direction from the rotation center of the dispersion table toward the hopper;
A screw portion including a helical member that is disposed in the trough and conveys an object to be weighed supplied into the trough by the dispersion table to the hopper by rotational driving;
A control unit for controlling the rotational drive in the dispersion table and the screw unit;
The screw portion is wound in the first rotation direction when viewed from the conveyance start end side from the conveyance end side of the object to be weighed in the trough,
The control unit, when viewed from the conveyance start end side of the object to be weighed in the trough, in the second rotation direction opposite to the first rotation direction, and at the rotation center of the screw unit. When the drive mode for rotating the screw part is executed and the lower side of the dispersion table is viewed from the upper side to the lower side, the dispersion table is rotated in the first rotation direction with respect to the rotation center of the dispersion table. A first rotation drive mode to be performed and a second rotation drive mode to rotate the dispersion table in the second rotation direction are intermittently switched and executed.
The expected supply amount of the object to be weighed from the dispersion table into the trough in the first rotation drive mode is the expected supply amount of the object to be weighed from the dispersion table into the trough in the second rotation drive mode. More than
Combination weighing device.   The combination weighing device according to claim 1, wherein an operation time of the first rotation drive mode is longer than an operation time of the second rotation drive mode.   The combination weighing device according to claim 1 or 2, wherein an angular velocity of the dispersion table in the first rotation drive mode is faster than an angular velocity in the second rotation drive mode.   4. The combination weighing device according to claim 1, wherein an angular acceleration of the dispersion table in the first rotation drive mode is faster than an angular acceleration in the second rotation drive mode. 5.   The control unit has a third rotation drive mode for stopping rotation of the dispersion table, and executes the third rotation drive mode when switching between the first rotation drive mode and the second rotation drive mode. The combination weighing device according to any one of claims 1 to 4.

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