JP2005156226A - Weighing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a weighing apparatus for stably holding a container moved at a high speed while holding the container by using a bare minimum of magnets. <P>SOLUTION: This weighing apparatus 10 comprises a holder 28 for holding the container C at a weighing part 13. The holder 28 is equipped with a U-shaped shape member 28a, a back hold part 28d, and a bottom hold part 28e. The shape member 28a is equipped with an arm part 28c disposed on the upstream side and an arm part 28b disposed on the downstream side in the moving direction of the container C on the weighing part 13. With respect to the weighing apparatus 10, a magnet 29 is mounted on the arm part 28b positioned on the downstream side in the rotatively moving direction of the container C while any magnet 29 is not mounted on the arm part 28c positioned on the upstream side between the two arm parts 28b and 28c possessed by the shape member 28a. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a weighing device that receives an object to be weighed in a container and measures the whole container.

Conventionally, a weighing device that receives a container in which an object to be weighed is placed and measures the object to be weighed together with the container has been used. Among such weighing devices, there is one that performs weighing while moving a container for the purpose of performing high-speed weighing.
For example, Patent Document 1 discloses a rotary measuring instrument that holds a metal container by attaching a magnet to a U-shaped member (holding means) that holds the container. In this rotary measuring instrument, the container is held so that the rotating container does not jump out by centrifugal force due to the magnet's adsorption force.
Utility Model Registration No. 2509184 (released on June 11, 1996) JP-A-8-334404 (published on December 17, 1996)

However, the conventional weighing device has the following problems.
That is, in the weighing device disclosed in the above publication, magnets for holding the metallic container are attached to both the left and right sides of the arm portion of the U-shaped member regardless of the moving direction of the container. For this reason, although the force which adsorb | sucks a container increases, the reaction force at the time of delivery of a container will also become large. In addition, as in the weighing device disclosed in Patent Document 1, when the side wall is supported at four locations more than the minimum required two locations, the container cannot be stably held, It takes time to hold it stably. Furthermore, even when the container is held at one place on the bottom surface as in the weighing device disclosed in Patent Document 2, it is not possible to stably hold the moving container at a high speed. For this reason, in the conventional configuration, it is difficult to stably hold the container that is moved at a high speed.

  An object of the present invention is to provide a weighing device that can stably hold a container that is moving at a high speed while holding the container using a minimum necessary magnet.

  The weighing apparatus according to claim 1, a container in which an object to be weighed is placed, a weighing unit that has a holding unit that holds the container, receives the container while moving the holding unit, and measures the object to be weighed together with the container; It has. The holding unit includes a first holding member that holds the container on the upstream side in the moving direction, and a second holding member that holds the container on the downstream side. Further, the second holding member has a magnet that attracts the container by magnetic force. On the other hand, the first holding member does not have a magnet.

Here, the weighing unit includes a holding unit for holding the container, and the holding unit includes a first holding member and a second holding member. Here, although the 1st holding member located in the upstream in the movement direction of a holding part does not have a magnet, the 2nd holding member located in a downstream has a magnet.
Accordingly, when the container is received while moving the holding portion, the second holding member on the downstream side in the moving direction that first comes into contact with the container has the magnet, so that the received container can be held immediately. And since the 1st holding member of an upstream side does not have a magnet, it becomes possible to hold a container using a minimum necessary magnet. For example, even when a container is received at a predetermined position while the holding part moves on a straight line, the second holding member on the downstream side that comes into contact with the container first has a magnet. The container can be held by the attractive force of the magnet of the second holding member. Similarly, when the container is received while the holding portion is swung, the second holding member disposed on the downstream side that first contacts the container has a magnet, so that the container is immediately delivered when the container is delivered. The container can be held by the magnet's adsorption force.

Furthermore, since the holding stability of the container in the measuring unit can be increased by using the minimum necessary magnet, it is possible to perform accurate weighing while moving the container even in a measuring device that requires high speed. .
A weighing device according to a second aspect is the weighing device according to the first aspect, wherein the first holding member and the second holding member are arm portions of a U-shaped member.

Here, by using the U-shaped member, the first and second holding members that hold the container on the upstream side and the downstream side in the moving direction can be easily formed.
A weighing device according to a third aspect is the weighing device according to the first or second aspect, wherein the container has a flange portion along the outer peripheral surface, and the second holding member has an attractive force of the magnet. By holding the collar part of the container.

Here, since the attracting force gradually increases as the distance between the magnet and the container approaches due to the magnetic force lines generated in a spiral shape from the magnet, the collar portion of the container can be stably held.
A weighing device according to a fourth aspect is the weighing device according to any one of the first to third aspects, in which the weighing unit performs weighing while moving the container.
Here, in addition to the container receiving process, the weighing process is performed while moving the container, thereby enabling high-speed processing.

A weighing device according to a fifth aspect is the weighing device according to any one of the first to fourth aspects, in which the weighing unit receives the container while rotating the holding unit.
Here, even when the container is received and weighed while rotating the container in the weighing device, the container is prevented from being detached from the holding part by centrifugal force due to the magnet's adsorption force of the second holding member of the holding part. The container can be securely held. Furthermore, by rotating the container, the installation area of the weighing device can be reduced and the space can be saved as compared with the conventional weighing device that linearly moves the container.

A weighing device according to a sixth aspect is the weighing device according to any one of the first to fifth aspects, wherein the weighing unit moves the container in a horizontal plane.
Here, since the container is moved only in the horizontal plane, it can be measured and transported without applying a load to the object to be weighed in the container as compared with the case where the container is moved in the vertical direction.
The weighing device according to claim 7 is the weighing device according to any one of claims 1 to 6, wherein the holding portion further includes a third holding member that holds the side surface of the container in the horizontal direction. The third holding member has a magnet.

Here, even with the third holding member that holds the container in the horizontal direction, the container can be held more reliably by holding the container by the magnet's attractive force.
The weighing device according to claim 8 is the weighing device according to any one of claims 1 to 7, wherein the holding portion further includes a fourth holding member that supports the bottom of the container. The holding member has a magnet.

Here, even in the fourth holding member that supports the bottom of the container, the container can be held more reliably by holding the container by the magnet's attractive force.
A weighing device according to a ninth aspect is the weighing device according to any one of the first to eighth aspects, wherein the container is made of magnetic stainless steel.
Here, a stainless steel container made of a material that does not easily rust and has magnetism that is attracted to the magnet is used. Thereby, even when handling food or the like, the container can be used with a sense of hygiene, and the container can be securely held by the attractive force of the magnet.

A weighing device according to a tenth aspect is the weighing device according to any one of the first to ninth aspects, wherein the weighing unit is provided with a weighing device for weighing an object to be weighed and a holding device provided for each weighing device. A plurality of sets of parts are provided.
Here, since a plurality of objects to be weighed can be weighed simultaneously using a plurality of measuring instruments, high-speed processing becomes possible.

A weighing device according to an eleventh aspect is the weighing device according to any one of the first to tenth aspects, further including a delivery unit that delivers the container to the weighing unit.
Here, the container can be smoothly delivered to the holding unit in the measuring unit by providing the delivery unit at a position where the container is delivered.
A weighing device according to a twelfth aspect is the weighing device according to any one of the first to eleventh aspects, wherein the delivery unit turns the container in a direction opposite to the turning direction of the holding unit in the weighing unit. .

Here, since the holding part and the delivery part in the measuring part are rotating in opposite directions, the containers are delivered while moving in the same direction at the positions where they are in contact with each other. For this reason, the container can be smoothly delivered at the container delivery position.
A weighing device according to a thirteenth aspect is the weighing device according to any one of the first to twelfth aspects, wherein the delivery unit is swung by the same drive source as the drive source for rotating the holding unit in the weighing unit. Is done.

Here, since the holding part and the delivery part in the measuring part are turned by the same drive source, both turns can be easily synchronized, so that the container can be delivered more smoothly.
15. A weighing device according to claim 14, comprising a container in which an object to be weighed is placed and a holding part for holding the container, and a weighing part for receiving the container while moving the holding part and weighing the object to be weighed together with the container. And. Further, the holding portion is provided between the first holding member that holds the container on the upstream side in the moving direction, the second holding member that holds the container on the downstream side, and the first holding member and the second holding member. And a suction part that sucks the container in a non-contact manner. The container is supported at two points at each of the first holding member and the second holding member.

Here, it is attracted by the suction force of the suction portion provided between the first holding member and the second holding member, and is supported at each of the first holding member and the second holding member, that is, at two points. Yes.
Here, when the container is supported at three points, the container is not stable in the holding portion, and rattling is likely to occur. On the other hand, in the weighing device of the present invention, the container is held at two positions of the holding part while being attracted in a non-contact manner by the suction force of the suction part, thereby stably holding compared to the three-point support. Can do. Therefore, the container can be stably moved at a high speed, and accurate weighing can be performed even while the container is moved.

A combination weighing device according to a fifteenth aspect includes the weighing device according to any one of the first to fourteenth aspects.
Here, since a plurality of the weighing devices described above are provided, the same effect as that obtained by the weighing device can be obtained as a combination weighing device. In addition, the mechanism for mechanically holding the container has a limit in speeding up delivery, but since the above-described weighing device is provided, a combination weighing device that can further increase the speed by using a magnet for holding the container can be provided. .

  According to the metering device of the present invention, the container is positioned on the downstream side in the moving direction of the holding portion, and the container received by the second holding member having the magnet can be immediately held, and the first holding on the upstream side is also possible. Since the member does not have a magnet, the container can be held using the minimum necessary magnet, and therefore accurate weighing can be performed even while the container is moved.

Embodiment 1
[Configuration of the entire weighing device]
The weighing device 10 according to an embodiment of the present invention measures a measurement object such as food contained in a container C having an opening in the upper portion, and takes out a desired container C from a plurality of stored containers C. The weighing device discharges the object to be weighed from the container C. Further, as shown in FIGS. 1, 1, and 2, the weighing device 10 includes a supply unit 12, a weighing unit 13, a stock unit 14, a discharge unit 15, delivery units 16 a to 16 c, and a discharge chute 17 as main components. The operation unit 18 and the turning mechanism 19 are provided.

  As shown in FIG. 3, the container C is a cup-shaped container having an open top, and has a collar portion C1 on the outer periphery and a bottom C2 on the bottom. Further, the container C conveys the object to be weighed from the supply position to the discharge position while circulating in the measurement apparatus 10, and moves through the measurement apparatus 10 while being constantly moved by the measurement unit 13, the stock unit 14, and the discharge unit 15. It is circulating. For this reason, in the measuring device 10 of this embodiment, each process of supply of an object to be measured, weighing, stocking, and discharging is performed on the moving container C. Furthermore, the container C is a member made of stainless steel having magnetism, and is held in each of the parts 13 to 15 by an attracting force due to a magnetic force of a magnet included in a holder 28 such as a measuring part 13 described later. By using a stainless steel container as the container C in this way, there is no risk of rusting, and even when food or the like is used as an object to be weighed, there is no need to worry about hygiene. Further, even if it is made of stainless steel, it is made of stainless steel with magnetism that is attracted to the magnet, so that the container C can be held by the magnet's attracting force in the holder 28 described later.

The supply unit 12 conveys the object to be weighed placed on the trough 21 in a predetermined direction by reciprocating the trough 21 back and forth, and throws it into the container C that is swiveling immediately below the supply unit 12. To do.
The measuring unit 13 includes a plurality of measuring devices 25a to 25e (see FIG. 5), and measures an empty container C in which an object to be weighed is not placed and a container C in which an object to be weighed is placed. The configuration of the measuring unit 13 will be described in detail later.

  As shown in FIG. 1, the stock unit 14 includes a plurality of storage units 30 that store five containers C in which objects to be weighed are placed in the vertical direction, and stores the storage unit 30 around the rotation axis A2. Is turning. Further, the stock unit 14 can move the plurality of storage units 30 in the vertical direction. Accordingly, the storage unit 30 is moved to the height of the delivery unit 16a to receive the container C from the weighing unit 13, and the storage unit 30 is moved to the height of the delivery unit 16b to move the desired container C to the discharge unit 15. Can be handed over.

The discharge unit 15 receives the desired container C taken out from the plurality of containers C three-dimensionally stored in the stock unit 14 from the delivery unit 16b, and reverses it while moving in the direction of the supply unit 12. Thereby, the to-be-measured object put in the container C can be discharged | emitted to a desired place.
The delivery units 16a to 16c are provided between the weighing unit 13 and the stock unit 14, between the stock unit 14 and the discharge unit 15, and between the discharge unit 15 and the measurement unit 13, respectively. The container C is transferred between the respective parts while moving in the direction opposite to the swivel movement direction.

The discharge chute 17 is a funnel-shaped member having an upper portion and a lower portion that are open, and has a lower opening 17 a and is disposed in the vicinity of the discharge portion 15. Further, the discharge chute 17 discharges an object to be measured discharged from the container C inverted in the discharge unit 15 from the lower opening 17a.
The operation unit 18 is input with a set value such as a driving speed by the user, and displays various types of information related to driving and the like. In the present embodiment, a control unit 20 that controls the overall operation of the weighing device 10 is provided inside the operation unit 18.

  Here, in the weighing device 10 of the present embodiment, as shown in FIG. 2, along the movement path of the container C, a supply weighing zone R1, a container delivery zone R2, a stock zone R3, a container delivery zone R4, a discharge zone R5 and container delivery zone R6 are formed. The container C moves in order from each zone R1 to R6 and circulates in the weighing device 10. In addition, the dashed-dotted line shown in FIG. 2 has shown the locus | trajectory of the center position of the container C to circulate.

  In the supply weighing zone R1, the weighing unit 13 supplies the object to be measured to the container C and measures the container C and the object to be weighed. Here, first, an empty container C is weighed. Then, an object to be weighed is introduced into the container C, and the container C containing the object to be weighed is weighed. In the container delivery zone R2, the delivered container C is received from the weighing unit 13 in the delivery unit 16a and delivered to the stock unit 14. In the stock zone R3, the container C is received from the delivery unit 16a and stored three-dimensionally in the stock unit 14. Here, the plurality of containers C that have been weighed are three-dimensionally stored, and the plurality of containers C are circulated in the stock unit 14. In the container delivery zone R <b> 4, the container C selected by the control unit 20 from the plurality of containers C stored in the stock unit 14 is received and delivered to the discharge unit 15. In the discharge zone R5, the container C received from the delivery unit 16b is turned while being turned, and the object to be measured is discharged with the lower opening 17a of the discharge chute 17 as the discharge target position. In the container delivery zone R6, the container C that has been emptied after being discharged is received from the discharge unit 15 and delivered to the weighing unit 13 again.

In the weighing device 10 of the present embodiment, the container C is repeatedly circulated in the weighing device 10 through the zones R1 to R6 as described above.
Note that “upstream side” and “downstream side” described later indicate the upstream side and the downstream side based on the circulation direction of the container C described above.
[Configuration of weighing unit]
The weighing unit 13 is a device for weighing an object to be weighed in the container C, and is arranged on the downstream side of the discharge unit 15 and the upstream side of the stock unit 14 as shown in FIG. . As shown in FIGS. 4 and 5, the measuring unit 13 includes five measuring instruments 25 a to 25 e and five holders 28 provided corresponding to the measuring instruments 25 a to 25 e. Thereby, since a plurality of containers C can be weighed simultaneously, the weighing process can be speeded up. Then, the weighing unit 13 turns these measuring instruments 25a to 25e and the like around the rotation axis A1 to which the rotational driving force from the turning mechanism 19 is transmitted. Thereby, the measurement part 13 also has a function as a conveyance mechanism of the container C.

  As shown in FIG. 4, each of the measuring instruments 25 a to 25 e has a load cell 27 in a circular box 26. Then, the weighing of the object to be weighed placed in the container C held by the holder 28 is performed while turning. Thereby, since it measures while rotating the container C toward the stock part 14 in which the next process is performed, the process from measurement to stock can be speeded up. Further, even when measuring while moving the container C, the time from receiving the container C from the delivery unit 16c to delivering the container C to the delivery unit 16a is used as the time for measuring. Sufficient weighing time can be secured. Further, in the present embodiment, weighing is performed while the container C is swung. However, since the magnetized stainless steel container C is held by using a magnet 29 attached to the holder 28 described later, the container C is not removed from the holder 28 by centrifugal force, and the container C is held in the holder 28. Can be held.

The holder 28 is provided for each of the measuring instruments 25a to 25e, and receives and holds the container C from the delivery unit 16c while turning and moving in the horizontal plane. In this way, by moving the container C in a horizontal plane, the container C can be delivered and weighed without applying a load to the object to be weighed. The configuration of the holder 28 will be described in detail later.
The weighing is performed in a state where the container C and the weighing devices 25a to 25e are relatively stopped. That is, the container C and the measuring devices 25a to 25e are measured while moving at the same speed. Thereby, even when the measurement is performed while the container C is moved, the accurate measurement can be performed as in the case where the measurement is performed while the movement of the container C is stopped.

  Further, the weighing unit 13 receives the container C that has been emptied by discharging the object to be measured in the discharge unit 15 from the delivery unit 16c, and measures the empty container C while lowering the chute 24 that the supply unit 12 includes. The object to be weighed is newly supplied from the supply unit 12 here. In this way, the weighing unit 13 receives the container C that has completed the process from weighing to discharging, and sends it again to the process from weighing to discharging. For this reason, the container C can be circulated in the weighing device 10.

[Configuration of holder]
As shown in FIG. 6, the holder 28 includes a U-shaped member 28a, a back surface holding portion (third holding member) 28d, and a bottom holding portion (fourth holding member) 28e.
The U-shaped member 28a is a member that holds the container C along the side surface of the container C, and the opening portion of the U-shaped member 28a faces the receiving side of the container C, that is, the U-shaped member. It arrange | positions so that the opening part of 28a may face the turning center direction outer side. The U-shaped member 28a has an arm portion (first holding member) 28c located on the upstream side in the moving direction of the container C and an arm portion (second holding member) 28b located on the downstream side. ing. A magnet (permanent magnet) 29 is embedded in the downstream arm portion 28 b of the U-shaped member 28 a, and the magnetized stainless steel container C is held by the magnetic force of the magnet 29. Then, the container C is placed between the U-shaped member 28a and the bottom holding portion 28e by covering the collar portion C1 of the container C shown in FIG. 3 along the side wall of the container C with the U-shaped member 28a. Hold.

It should be noted that lines of magnetic force generated from the magnet 29 are generated in a spiral shape from the magnet 29 at the attachment position of the magnet 29 in the arm portion 28 b. Therefore, the suction force gradually increases as the container C approaches, and the suction force to the container C does not suddenly occur, so that the container C can be stably received.
The back surface holding portion 28d is a member that holds the received container C from the side surface of the container C in the horizontal direction. The back surface holding portion 28d is disposed at the lower portion of the base portion of the U-shaped member 28a described above, and holds the side surface of the container C received from the delivery portion 16c at the innermost side of the U-shaped member 28a.

  As shown in FIG. 4, the container C is not in contact with the back surface holding portion 28de, and supports the container C at two points in the U-shaped member 28a as shown in FIG. Thereby, compared with the case where the container C is hold | maintained at 3 points | pieces, shakiness of the container C does not arise in the holder 28, and stable holding | maintenance is attained by 2 point | piece support. Therefore, it is possible to perform accurate weighing even when the container C is moved at a high speed as compared with the case where the container C is supported at three points.

The bottom holding portion 28e is a member that holds the received container C in the vertical direction. The bottom holding portion 28e has a surface parallel to the U-shaped member 28a, and the bottom portion C2 of the container C received from the delivery portion 16c is held from below on this surface.
The holder 28 composed of the members as described above is driven by the rotational driving force applied to the rotational axis A4 from the same drive source as the other parts (stock part 14, discharge part 15 and the like) that are pivoting. It is swiveling within the measuring unit 13. Then, in synchronization with the stock unit 14, the discharge unit 15, the delivery units 16a to 16c, and the like, the delivery unit 16c that receives the container C and the delivery unit 16a that delivers the container C are swung in the opposite direction. As a result, the sides that come into contact with each other for delivering the container C swivel in synchronization with the same direction. Therefore, the container C can be received and delivered smoothly.
[Configuration of delivery section]
As shown in FIG. 2, the delivery units 16 a to 16 c are arranged between the weighing unit 13 and the stock unit 14, between the stock unit 14 and the discharge unit 15, and between the discharge unit 15 and the measurement unit 13, respectively. ing.

  The delivery unit 16 a is provided between the weighing unit 13 and the stock unit 14, receives the weighed container C from the weighing unit 13, and delivers it to the stock unit 14. The delivery unit 16b is provided between the stock unit 14 and the discharge unit 15, and receives the desired container C selected by the control unit 20 (see FIG. 1) from the stock unit 14 and delivers it to the discharge unit 15. The delivery unit 16 c is provided between the discharge unit 15 and the weighing unit 13. The delivery unit 16 c receives an empty container C from which the object to be weighed is discharged from the discharge unit 15 and delivers it to the measurement unit 13. Thus, the delivery part 16a-16c delivers the container C between each process, such as measurement, stock, discharge | emission, so that the container C can be circulated in the weighing device 10.

Moreover, the delivery parts 16a-16c are each provided with the upper board 41, the lower board 42, and the three rotating shafts A4, as shown in FIG. The upper plate 41 has three arc portions 44 along the outer peripheral surface of the container C, and holds three containers C in the arc portion 44. The lower plate 42 has six protrusions 43, and the container C is inserted between the two protrusions 43 to support the container C from below. The rotational axis A4 receives a rotational driving force from a turning mechanism 19 described later, and rotates the delivery units 16a to 16c so that the delivery units 16a to 16c are synchronized. Thereby, the delivery parts 16a-16c have the function as a conveyance mechanism of the container C with the function to deliver the container C between each part. In addition, the rotation direction of the delivery parts 16a-16c is a direction opposite to the rotation direction of the measurement part 13, the stock part 14, and the discharge part 15. Thereby, each delivery part 16a-16c, the measurement part 13, etc. will turn in the same direction on the side which delivers the adjacent container C. Therefore, the delivery of the container C can be performed smoothly.
[Operation from Weighing to Discharging by the Weighing Device of this Embodiment]
Here, the flow of processing by the weighing device 10 of the present embodiment having the above-described configuration will be described with reference to the flowcharts shown in FIGS. In addition, each process performed according to the flowchart shown below is the control flow controlled by the control part 20 (refer FIG. 1).

First, the supply and weighing process in the weighing unit 13 will be described with reference to the flowchart shown in FIG.
The weighing unit 13 receives an empty container C from the delivery unit 16c in step (hereinafter referred to as S) 1. In S <b> 2, the empty container C is weighed before the object to be weighed is supplied by the supply unit 12. Subsequently, in S <b> 3, the objects to be weighed are sequentially introduced into the container C that is being swung by the weighing unit 13 by the supply unit 12. In S4, the weighing unit 13 measures the container C containing the object to be weighed. Here, the weighing object can be weighed by subtracting the weighing result of the empty container C from the weighing result of the container C containing the weighing object. Finally, in S5, the weighed container C is delivered to the delivery unit 16a.

The weighing unit 13 transmits the measurement result to the control unit 20. The control unit 20 stores the received measurement result of the object to be measured in a storage unit such as a ROM or a RAM, and accumulates data for performing combination weighing.
Next, the accumulation | storage process of the container C in the stock part 14 is demonstrated using the flowchart shown in FIG.

  In the stock unit 14, the container C that has been weighed is received from the delivery unit 16a by the holder of the storage unit 30 in S11. Subsequently, in S <b> 12, the container C is circulated (standby) in the stock unit 14 while being held in the storage unit 30 until the received container C is selected by the control unit 20. In S13, when a selection request is received from the control unit 20, in S14, the container C that has received the selection request is moved in the vertical direction. The container C selected at this time is moved to the height position of the delivery part 16b. Next, in S15, the container C requested to be selected is delivered to the delivery unit 16b. Here, the container C delivered to the delivery unit 16b proceeds to S21 shown in FIG. Although not included in the flowchart, in the stock unit 14, the storage unit 30 is configured to additionally replenish a new container C from the measuring unit 13 at the position of the storage unit 30 that has held the delivered container C. Is maintained around the rotational axis A2 up to the position of the delivery section 16a while maintaining the height position as it is. Then, a newly weighed container C is additionally replenished to the position from the delivery unit 16a.

Finally, the process of discharging the objects to be weighed from the container C in the discharge unit 15 will be described using the flowchart shown in FIG.
In the discharge unit 15, in S21, the container C that has been requested for selection is received from the delivery unit 16b by the holder of the discharge unit 15. In step S22, the container C is raised while being swung around the rotation axis A3, and the rotation of the container C is started simultaneously with the rise. Then, the container C is further rotated as it rises, and the container C is completely rotated 180 degrees until it reaches the highest point, and the container C is turned over so that the opening faces downward. Subsequently, in S23, after the container C is inverted 180 degrees, the container C is lowered as it is. Here, the object to be weighed departs from the swirling trajectory of the container C in the discharge portion 15 and is discharged toward the vicinity of the central portion of the discharge chute 17 arranged in the tangential direction of the swirling track. In S24, the container C from which the object to be weighed is discharged is rotated 180 degrees again to return the opening to the upward state. Finally, in S25, the container C is delivered to the delivery unit 16c.

As described above, the turning movement of the container C is performed by transmitting the rotational driving force from the rotation motor of the turning mechanism 19 to each of the rotation axes A1 to A4.
[Features of this weighing device]
(1)
The weighing device 10 of this embodiment has a holder 28 that holds the container C in the weighing unit 13. The holder 28 includes a U-shaped member 28a, a back surface holding portion 28d, and a bottom holding portion 28e. Further, the U-shaped member 28a includes an arm portion 28c disposed on the upstream side and an arm portion 28b disposed on the downstream side in the moving direction of the container C in the measuring unit 13.

Here, some conventional weighing devices 10 have a U-shaped member as in the weighing device 10 of the present embodiment. However, a magnet attached to hold the container C is used as the container C. It was attached to the U-shaped member regardless of the moving direction. For this reason, the amount of magnets to be attached is increased more than necessary, which causes a cost increase.
Therefore, in the weighing device 10 of the present embodiment, the holding position of the container C in the weighing unit 13 is ensured by using the minimum necessary magnet by determining the attachment position of the magnet in consideration of the moving direction of the container C. ing. Specifically, the magnet 29 is attached to the arm portion 28b located on the downstream side in the swivel movement direction of the container C among the two arm portions 28b and 28c of the U-shaped member 28a. The magnet 29 is not attached to the arm part 28c located.

  Normally, when receiving the moving container C with the holder 28, the container C is held by the entire holder 28 after contacting the arm portion 28b located on the downstream side. Therefore, in the weighing device 10 of the present embodiment, when the container C is moved and received by the holder 28, the magnet 29 is attached to the portion of the U-shaped member 28a that first contacts the container C, that is, the arm portion 28b on the downstream side. The magnet 29 is not attached to the upstream arm portion 28c. As a result, the container C can be held using the minimum necessary magnets, and the container C that is in the turning movement can be held without increasing the cost.

(2)
The weighing device 10 of the present embodiment performs weighing while moving the container C in the weighing unit 13.
In this way, by performing weighing while moving the container C in the direction of the stock unit 14 for performing the next process, the process from receiving the container C to delivery to the stock unit 14 can be speeded up.

(3)
In the weighing device 10 of the present embodiment, the container C is received from the delivery unit 16 c while the holder 28 is pivoted in the weighing unit 13.
Here, a centrifugal force is applied to the container C by a swiveling movement. The U-shaped member 28a that holds the container C is disposed with the opening portion facing outward in the direction of the pivot center to which centrifugal force is applied. For this reason, since there is no member that physically suppresses the movement of the container C to which the centrifugal force is applied, the container C may be detached from the holder 28 by the centrifugal force during the turning movement. Therefore, in the weighing device 10 of this embodiment, a magnet is attached to the arm portion 28 b of the holder 28. For this reason, the container C can be reliably held using the minimum necessary magnet 29 without the container C jumping out toward the outside in the turning center direction.

Furthermore, the weighing unit 13 can be saved in space compared to a weighing device that moves the container C linearly.
(4)
The weighing device 10 of the present embodiment uses a stainless steel container C having magnetism as a container for carrying an object to be weighed.

Thereby, since rust does not generate | occur | produce in the container C, even when handling to-be-measured objects, such as a foodstuff, the problem on the hygiene side by generation | occurrence | production of rust can be eliminated. Furthermore, even if it is made of stainless steel, it is magnetized, so that the container C can be held by a magnet attached to the holder 28. Therefore, the container C to be pivoted can be reliably held.
(5)
The weighing device 10 of the present embodiment is a delivery unit that delivers containers C between the weighing unit 13 and the stock unit 14, between the stock unit 14 and the discharge unit 15, and between the discharge unit 15 and the measurement unit 13. 16a to 16c are provided.

Thus, the container C can be delivered more smoothly by temporarily delivering the container C via the delivery units 16a to 16c, instead of directly delivering the container C between the respective parts.
(6)
In the weighing device 10 of the present embodiment, the delivery units 16a to 16c deliver the container C while turning the holder 28 in a direction opposite to the turning direction of the container C in the weighing unit 13, the stock unit 14, and the discharge unit 15. ing.

Thereby, in the side which touches each part 13-15, the delivery of the container C can be performed, rotating in the same direction. Therefore, the container C can be delivered more smoothly.
(7)
In the weighing device 10 of the present embodiment, the delivery units 16a to 16c are turned by the same drive source as the drive source turning the weighing unit 13, the stock unit 14, and the discharge unit 15.

Thus, since both can be easily synchronized by turning delivery parts 16a-16c using the same drive source as said each part 13-15, delivery of container C between each part is performed more smoothly. be able to.
[Embodiment 2]
Another embodiment according to the present invention will be described below with reference to FIGS. 11 and 12.

The combination weighing device 60 according to the present embodiment sorts articles such as food and industrial products into a plurality of containers having openings in the upper part, and combines them so that the total weight of articles contained in each container falls within a predetermined weight range. An apparatus for selecting a container and discharging a plurality of articles in a predetermined weight range.
As shown in FIG. 11, the combination weighing device 60 includes four weighing devices 10 of the first embodiment (weighing devices 10 a to 10 d) and a discharge chute 17.

The combination weighing device 60 includes the control unit 20 connected to the four weighing devices 10a to 10d in one of the weighing devices 10a.
The control unit 20 receives data relating to the weights of the objects to be weighed, which are measured by the weighing units 13a to 13d of the four weighing devices 10a to 10d and stored in the stock unit 14, from the weighing units 13a to 13d. Then, add the weight of the objects to be weighed stored in the container C to the stock parts 14a to 14d of the four weighing devices 10a to 10d, and add the weight of the objects to be weighed so as to be within the desired weight range. Combine things. Here, if the control part 20 determines the combination used as a desired weight range, each measuring device 10a-10d will select the container C in which the to-be-measured object of the weight used for a combination is put, and stock part 14a- Each is taken out from 14d. And in each discharge part 15a-15d, a desired to-be-measured object is discharged | emitted from the container C, and is thrown into the discharge chute 17. FIG.

The combination weighing by the combination weighing device 60 of the present embodiment is performed in a state where the four weighing devices 10a to 10d are arranged so as to surround the discharge chute 17, as shown in FIG.
Each of the weighing devices 10a to 10d includes the weighing units 13a to 13d, the stock units 14a to 14d, and the discharge units 15a to 15d described in the first embodiment. The stock units 14a to 14d each have five rows of storage units 30aa to 30de that hold the five containers C in the vertical direction as described above.

  Further, in the combination weighing device 60 of the present embodiment, only the weighing device 10a has the control unit 20 included in the weighing device 10 of the first embodiment. Here, the operation of the four weighing devices 10 is controlled. Do. That is, the control unit 20 in the weighing device 10a performs a combination of the weights of the objects to be weighed stored in the plurality of containers C stored in the stock units 14a to 14d included in the four weighing devices 10a to 10d. Is called. Then, the objects to be weighed from three or four of the weighing devices 10a to 10d are directed to the lower opening 17a of the discharge chute 17 so that the total of the objects to be weighed falls within a desired weight range. Discharged.

In the combination weighing device 60 including the four weighing devices 10a to 10d as described above, for example, from the five containers C held in the vertical direction in the accumulation unit 30ac provided in the stock unit 14a of the weighing device 10a. A container C containing an object to be weighed in a desired weight is delivered to the discharge unit 15a.
At the same time, in the other weighing devices 10b to 10d, the desired weight necessary for combination weighing is similarly selected from the five containers C held in the storage units 30bc to 30dc in the stock units 14b to 14d. The container C containing the objects to be weighed is delivered to the discharge units 15b to 15d.

Subsequently, in each of the weighing devices 10a to 10d, the five storage units 30ad to 30dd included in the stock units 14a to 14d respectively hold five containers C, that is, up to 20 containers C. Combination weighing is performed using the weight data of the objects to be weighed.
Thereafter, the combination weighing is performed on the accumulation units 30ae to 30de, the accumulation units 30aa to 30da, and the accumulation units 30ab to 30db using the weight data of the objects to be weighed in the 20 containers C.

  In the combination weighing device 60 of the present embodiment, as described above, among the storage units 30aa to 30de included in the stock units 14a to 14d, the storage units 30aa, 30ba, 30ca, 30da and the storage units 30ab, 30bb, 30cb, 30db, storage units 30ac, 30bc, 30cc, 30dc and storage units 30da, 30db, 30dc, 30dd and storage units 30ae, 30be, 30ce, 30de are set as one set, and combination weighing is performed.

Further, for example, in the case where combination weighing is performed by discharging the objects to be weighed from only three weighing devices 10a to 10c among the four weighing devices 10a to 10d, the weighing device 10d that does not perform discharging is discharged. The container C is not reversed in the portion 15d.
In this way, by waiting for the stock units 14a to 14d to rotate once by performing combination weighing in the plurality of containers C held in the corresponding storage units 30 in the stock units 14a to 14d, respectively. And continuous combination weighing can be performed.

In this combination, the objects to be weighed may be discharged from each of the four weighing devices 10, or if there is a container C in which an object to be weighed within a desired weight range is placed from the beginning. It may be discharged from one weighing device 10.
As a result, an object to be weighed can be discharged within a desired weight range. Thus, by combining the four weighing devices 10 of the first embodiment, it is possible to perform high-speed processing 240 times per minute, for example.
[Features of this combination weighing device]
The combination weighing device 60 of the present embodiment is configured by combining four weighing devices 10 of the first embodiment.

Here, in the weighing device 10 according to the first embodiment, as described above, the weighing unit 13 performs weighing while holding the container C using the minimum necessary magnet 29, thereby preventing an increase in cost. Weighing can be performed while the container C is swung.
Therefore, also in the combination weighing device 60 including the four weighing devices 10, the same effect as that obtained by the weighing device 10 can be obtained.
[Other Embodiments]
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of invention.

(A)
In the said Embodiment 1, the arm parts 28b and 28c of the U-shaped member 28a were demonstrated and demonstrated as an example which is a 1st holding member and a 2nd holding member. However, the present invention is not limited to this. For example, instead of being a part of one member such as the U-shaped member 28a, both may be formed as separate members. In addition, the first holding member and the second holding member may be formed as a part of a member having another shape without being limited to the U shape.

(B)
In the first embodiment, the example in which the magnet 29 is embedded only in the downstream arm 28b in the moving direction of the holder 28 has been described. However, the present invention is not limited to this. For example, the magnet 29 may be embedded in the back surface holding portion 28d and the bottom holding portion 28e shown in FIG. In this case, since the number of magnets having an attractive force with respect to the container C increases, the container C can be held more reliably. However, from the viewpoint of holding the container C using the minimum necessary magnet, it is more preferable that the magnet is attached only to the arm portion 28b on the downstream side as in the above embodiment.

  In addition, as shown in FIG. 13, when a magnet is provided in the back surface holding part (suction part) 28d, the container C is attracted by the suction force of the magnet 29 in a non-contact state with respect to the container C, and U Two points are supported on the letter-shaped member 28a. Thereby, since the container C can be held more stably, accurate weighing can be performed even while moving at a high speed.

(C)
In the first embodiment, the holding of the container C by the holder 28 of the measuring unit 13 has been described. However, the present invention is not limited to this. For example, the holding by each holder in the stock unit 14 and the discharge unit 15 other than the weighing unit 13 can be similarly applied.
(D)
In the second embodiment, an example in which four weighing devices 10 are provided has been described. However, the present invention is not limited to this with respect to the number of weighing devices 10. For example, combination weighing may be performed using one or two weighing devices 10, or combination weighing may be performed using five or more weighing devices 10.

  Since the weighing device of the present invention has the effect of being able to hold the moving container C using the minimum necessary magnets, other measuring devices having a holder for holding the moving container C can also be used. Applicable.

1 is a front view showing a weighing device according to an embodiment of the present invention. FIG. 2 is a plan view showing the weighing device of FIG. 1. The perspective view which shows the container used in the measuring apparatus of FIG. The partial cross section figure in the side view which shows the measurement part with which the measurement apparatus of FIG. 1 is provided. The top view which shows the measurement part of FIG. The perspective view which shows the holder which the measurement part of FIG. 4 has. (A) is a top view which shows a delivery part, (b) is a side view which shows a delivery part. The flowchart which shows the operation | movement in the supply and measurement process by the weighing | measuring apparatus of this invention. The flowchart which shows the operation | movement in the stock process by the measuring device of this invention. The flowchart which shows the operation | movement in the discharge process by the measuring device of this invention. 1 is a perspective view showing a combination weighing device according to an embodiment of the present invention. The top view which shows the operation | movement which performs combination measurement by the combination measurement apparatus of FIG. The top view which shows the relationship between the container and holder which show other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Weighing device 12 Supply part 13 Weighing part 14 Stock part 15 Discharge part 16a-16c Delivery part 17 Discharge chute 18 Operation part 19 Turning mechanism 20 Control part 21 Trough 24 Chute 25a-25e Measuring instrument 26 Circular box 27 Load cell 28 Holder (holding) Part)
28a U-shaped member 28b Arm portion (first holding member, arm portion of U-shaped member)
28c Arm part (second holding member, arm part of U-shaped member)
28d Rear holding part (third holding member)
28e Bottom holding part (fourth holding member)
29 Magnet 30 Accumulator 60 Combination Weighing Device A1-A4 Rotating Shaft C Container C1 Collar C2 Bottom

Claims (15)

A container in which an object to be weighed can be placed
A holding unit that holds the container, and a weighing unit that receives the container while moving the holding unit and measures the object to be weighed together with the container;
With
The holding portion includes a first holding member that holds the container on the upstream side in the moving direction, and a second holding member that holds the container on the downstream side,
The second holding member has a magnet that attracts the container by magnetic force, and the first holding member does not have the magnet.
Weighing device. The first holding member and the second holding member are arm portions of a U-shaped member,
The weighing device according to claim 1. The container has a collar portion along the outer peripheral surface,
The second holding member holds the collar portion of the container by the attraction force of the magnet;
The weighing device according to claim 1 or 2. The weighing unit performs weighing while moving the container;
The weighing device according to any one of claims 1 to 3. The weighing unit receives the container while rotating the holding unit;
The weighing device according to any one of claims 1 to 4. The weighing unit moves the container in a horizontal plane;
The weighing device according to any one of claims 1 to 5. The holding portion further includes a third holding member that holds the side surface of the container in the horizontal direction, and the third holding member includes a magnet.
The weighing device according to any one of claims 1 to 6. The holding portion further includes a fourth holding member that supports the bottom of the container, and the fourth holding member includes a magnet.
The weighing device according to any one of claims 1 to 7. The container is made of magnetic stainless steel.
The weighing device according to any one of claims 1 to 8. The weighing unit includes a plurality of sets each consisting of a weighing device for weighing the object to be weighed and the holding unit provided for each weighing device.
The weighing device according to any one of claims 1 to 9. A delivery unit that delivers the container to the weighing unit;
The weighing device according to claim 5. The delivery unit turns the container in a direction opposite to a turning direction of the holding unit in the measuring unit;
The weighing device according to claim 11. The delivery unit is turned by the same drive source as the drive source for turning the holding unit in the weighing unit.
The weighing device according to claim 11 or 12. A container in which an object to be weighed can be placed;
A holding unit that holds the container, and a weighing unit that receives the container while moving the holding unit and measures the object to be weighed together with the container;
With
The holding portion includes a first holding member that holds the container on the upstream side in the moving direction, a second holding member that holds the container on the downstream side, and the first holding member and the second holding member. A suction part for suctioning the container provided in a non-contact manner,
The container is supported at two points at each of the first holding member and the second holding member,
Weighing device. A weighing device according to any one of claims 1 to 14, comprising:
Combination weighing device.

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