JP2018135104A - Weighing device with hoppers and weighing method of taken out item - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a weighing device with high productivity and weighing accuracy, being able to shorten rotation stop time of hopper tubes.SOLUTION: A weighing device, which takes out an item to be weighed, has multiple hopper tubes, and each hopper tube has a weighing bucket to store the item to be weighed during weighing and, separately from the weighing bucket, a sub-bucket to store an already weighed item.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cutout weighing apparatus and a cutout weighing method for cutting out an object to be weighed.

  Conventionally, there is a weighing mechanism that weighs and cuts dry ingredients (powders, sprinkles, and cup ramen, etc.) and a drying mechanism that has a packaging mechanism for packaging the dried ingredients cut by the weighing mechanism. Bag filling devices are known. The conventional bagging device for the drying tool material has a hopper that can store the drying tool material and gradually discharge it from the lower part, and the drying tool material that is driven to rotate independently and discharged from the hopper by rotating downstream. And a plurality of cutting pipes arranged in parallel. On the downstream side of each cutting pipe, the drying tool material is weighed and stored in a predetermined amount, and further provided at the lower part is a measuring bucket provided with an openable / closable opening / closing damper for cutting out the temporarily stored drying tool material. Moreover, it further has a cutting chute which can supply the drying tool material discharged | emitted from each measurement bucket one by one to a packaging mechanism (refer patent document 1).

  According to the bagging device for a drying tool material described in Patent Document 1, it is possible to bag the weighed drying tool material.

JP 2004-314983 A JP-A-8-226845 Japanese Patent Laid-Open No. 11-132835

  However, in the bagging device for the drying tool described in Patent Document 1, the time during which the rotation of the cutting pipe is stopped is long. Even if the drying tool material in the measuring bucket reaches a predetermined amount and the rotation of the cutting cylinder stops, there is a predetermined order among the plurality of measuring buckets arranged side by side, and a cutting start signal from the cutting chute (that is, the cutting chute) This is because the open / close dampers of the weighing buckets are not opened until a signal indicating that is empty is received.

  In other words, in order to interlock with the device in the process after the cutting chute, it takes a long time to stop the rotation driving of the cutting cylinder.

  Therefore, an object of the present invention is to provide a cutting and weighing apparatus and the like that shorten the rotation stop time of the cutting pipe and have high productivity.

  A first aspect of the present invention is a cut-out weighing device for cutting out an object to be weighed, comprising a plurality of cut-out pipes for cutting out the object to be weighed. A cut-out weighing device comprising: a weighing bucket that houses a weighing object; and a sub-bucket that accommodates the weighing object that has been weighed in the weighing bucket, separately from the weighing bucket.

  A second aspect of the present invention is a cut-out weighing method using the cut-out weighing apparatus according to the first aspect, wherein the cut-out weighing apparatus includes a plurality of cut-out pipes for cutting out the objects to be weighed, and a plurality of the cut-out pipes A weighing bucket that accommodates the weighing object during weighing, and a sub bucket that accommodates the weighing object that has been weighed in the weighing bucket, separately from the weighing bucket, A cutting step of cutting out the weighing object from the cutting pipe into the weighing bucket, a weighing step of weighing the weighing object stored in the weighing bucket, and a re-accommodation of the weighing object from the weighing bucket to the sub-bucket Re-accommodating step, while the sub-bucket accommodates the object to be weighed, It is started, it is cut out weighing method.

  A third aspect of the present invention is a cut-out weighing method according to the second aspect, wherein a sub-bucket discharge step of discharging the object to be weighed downstream from the sub-bucket between the cut-out step and the re-containment step. Is a cut-out weighing method.

  A fourth aspect of the present invention is the second or third cut-out weighing method, wherein, in the cut-out step, the weighing device senses that the weighing object in the weighing bucket has reached a set weight. The cutting-out weighing method is such that the cutting-out pipe stops cutting and the cutting-out step ends.

  A fifth aspect of the present invention is the second or third cutting and weighing method, wherein the cutting pipe is cut when the cutting pipe rotates at a predetermined speed and / or for a predetermined time in the cutting step. Is cut out and the cutout step is completed.

  According to a sixth aspect of the present invention, there is provided a cut-out weighing device for cutting out an object to be weighed, a cut-out pipe that is a cylinder for cutting out the object to be weighed, and at least two receivers that support the cut-out pipe so as to be rotatable. A roller, an annular gear that is fixed to the outer peripheral surface of the cut-out pipe, and a drive gear that is a gear that transmits the power of the motor to the annular gear. This is a cutting and weighing device that is not a heavy cylinder but a single cylinder.

  A seventh aspect of the present invention is the cut-out weighing device according to the sixth aspect, wherein the toughness of the material of the annular gear is smaller than the toughness of the material of the drive gear.

An eighth aspect of the present invention is the cut-out weighing device according to the seventh aspect, wherein the annular gear is
It is fixed to the cutting pipe by a screw method,
The cutting weighing device is threaded in the direction opposite to the rotation direction of the cutting pipe.

A ninth aspect of the present invention is the cut-out weighing device according to the eighth aspect, comprising a plurality of the cut-out pipes,
The cut-out pipe is a cut-out weighing device whose rotation direction is opposite to that of the other cut-out pipes.

A tenth aspect of the present invention is the cutting and weighing apparatus according to any one of the sixth to ninth aspects, further comprising a hopper that supplies the object to be weighed to the cutting pipe,
The hopper and the cut-out pipe are cut-out weighing devices that are in contact with a connection member made of resin.

  According to each aspect of the present invention, an object to be weighed can be discharged from a weighing bucket to a sub-bucket and the rotation of the cutting pipe can be resumed. Therefore, the cutting pipe can be re-rotated immediately after the weighing, and the cutting stop time of the cutting pipe can be shortened to provide a high productivity cutting weighing device and the like.

  In order to increase the productivity of the cutting and weighing apparatus, it is conceivable to increase the rotation speed of the cutting pipe. However, if the brake is applied suddenly, the object to be weighed pops out and the cutout amount temporarily fluctuates. In order to prevent the material to be weighed from being suddenly discharged during sudden braking, it is necessary to take extra braking time until the rotation is stopped. In the end, there was a limit to increasing productivity by increasing the rotation speed of the cutting pipe while maintaining the accuracy of cutting.

  According to the present invention, since it is possible to secure a sufficient driving time for each cutting pipe, it is possible to rotate the cutting pipe at a lower speed than before and improve the cutting accuracy.

  According to the fourth aspect of the present invention, more accurate clipping can be performed.

  According to the fifth aspect of the present invention, a predetermined amount is cut out by rotating the cutting pipe at a predetermined speed for a predetermined time. For this reason, the measuring instrument is used in the measuring step, but is not necessary in the previous cutting step. Therefore, according to the cut-out weighing method of the fifth aspect of the present invention, the stabilization of the measuring instrument and the cut-out step can proceed simultaneously immediately after the start, so the rotation stop time of the cut-out pipe is shortened, and the productivity is further improved. It becomes possible.

  In the past, a method of rotating a single cylinder with a belt has been adopted as an inexpensive method with a small number of parts in order to rotate the cylinder of the cut-out weighing device (see Patent Document 2).

  Here, in order to rotate the cylinder with the belt, it is necessary to fix the belt to the cylinder very firmly. Since there was no premise to remove the tube and clean the inside of the tube, it can be said that the belt method was used.

  Since it has become common to clean the inside of a cylinder, a double cylinder system as shown in FIG. 7 has been used. This is an apparatus configuration in which the outer cylinder 51 is integrated with a fixed bearing 53 (bearing portion) and rotated via a gear 55 so that the inner cylinder 57 in contact with the object to be weighed can be taken out and cleaned. (See Patent Document 3).

  However, in the method described in Patent Document 3, since the outer cylinder 51 is fixed to the bearing 53 and is difficult to remove, it is difficult to perform maintenance such as cleaning the inside of the apparatus including the plurality of cutting pipes 59. . FIG. 8 shows a photograph of the cut-out weighing device of FIG. 7 that was actually used at the food production site. FIG. 8A is a photograph of the device with the inner cylinder removed. FIG. 8B is a photograph of the outer cylinder that has been disassembled and removed over a long period of time. The right side shows no dirt and the left side shows no dirt. As shown in Fig. 8, the outer cylinder, bearings, and gantry of the cut-out pipe have a lot of dirt, and although the inner cylinder can be cleaned, it is improved in terms of hygiene as a food production device. There was room for.

  Then, in the 6th viewpoint of this invention, it aims at providing the cut-out weighing apparatus which can improve a hygiene surface.

  According to a sixth aspect of the present invention, there is provided a cut-out weighing device having a configuration in which a single cylinder is supported by a receiving roller. Thus, by removing the cylinder that is in direct contact with the object to be weighed, the cylinder can be cleaned, and the view to the inside of the apparatus is improved. Therefore, it can wash | clean to every corner of an apparatus easily and it becomes possible to improve a hygiene surface.

  Conventionally, in order to keep the rotation axis of the cylinder from shifting, the outer cylinder has been securely fixed integrally with the fixed bearing portion. On the other hand, in the present invention, by supporting the single cylinder only with the drive gear and the receiving roller, it is possible to remove the entire cut-out pipe in exchange for the fact that the rotating shaft can be shaken. Even if the rotation axis of the cylinder is slightly deviated, the object to be weighed can be cut out as long as it rotates.

  Moreover, as a result of allowing the tube to swing somewhat, the tube can follow the movement of the member in contact with the tube. Therefore, for example, it becomes easy to suppress the resin portion where the hopper that introduces the object to be weighed into the cylinder comes into contact with the cylinder from being scraped by the cylinder. Normally, the resin at the connection part between the hopper and the cylinder is made of a material that does not affect the human body even if it is eaten, but it is possible to further improve hygiene by suppressing the resin part from being cut out in the first place. It becomes.

  Here, when both the annular gear and the drive gear are made of sturdy materials (for example, made of metal), both are worn and both need to be replaced. Since one is a metal gear and the other is a resin gear, only the resin gear needs to be replaced. Conventionally, it is troublesome to replace the annular gear integrated with the bearing, so the annular gear is made of metal and the drive gear is made of resin. Conventionally, the annular gear has been partially crimped and fixed to the cutting pipe in order to be securely fixed to the outer cylinder. When the annular gear is made of resin, such fixing cannot be performed.

  For the above reasons, conventionally, there has been an impediment to making the toughness of the annular gear fixed to the cylinder smaller than the toughness of the drive gear.

  According to the seventh aspect of the present invention, the worn annular gear is fixed to the detachable cutting pipe so as to be detachable, and can be easily replaced. Therefore, maintenance management of the gear becomes easy.

  Furthermore, according to the eighth aspect of the present invention, it is possible to fix the annular gear having low toughness to the cutting pipe without caulking. This is because the force continues to work in the direction in which the annular gear is continuously fixed as the cutting pipe rotates.

  Furthermore, according to the ninth aspect of the present invention, it is possible to prevent an object to be weighed, such as wiping, from being biased in the hopper, and to eliminate the unevenness of the object to be weighed in the hopper. Thereby, it becomes easy for the hopper to provide an equal amount of objects to be measured to the plurality of cutting pipes.

It is a figure which shows the outline | summary of the cut-out weighing apparatus which concerns on the Example of this invention. It is a flowchart which shows an example of the cut-out weighing method which concerns on Example 1 of this invention. It is a flowchart which shows an example of the cut-out weighing method which concerns on Example 2 of this invention. It is a figure which shows the outline | summary of the cutting-out weighing apparatus which concerns on Example 2 of this invention. It is a figure which shows the outline | summary of the cutting-out pipe in the cutting-out weighing apparatus of FIG. 4, (a) The state where the annular gear was fixed, (b) The figure which shows the state which removed the annular gear. It is a figure which shows the place which removed the cutting pipe in the cutting weighing apparatus of FIG. It is a figure which shows the outline | summary of the conventional cut-out weighing apparatus. It is a figure which shows the place which removed the inner cylinder in the cutting-out weighing apparatus of FIG.

  Embodiments of the present invention will be described below with reference to the drawings. The embodiment of the present invention is not limited to the following examples.

  FIG. 1 is a diagram showing an outline of a cut-out weighing device (an example of a “cut-out weighing device” described in the claims) according to an embodiment of the present invention, where (a) is a front view and (b) is a left side view. It is.

  Referring to FIG. 1, a cut-out weighing device 1 includes a hopper 2, a plurality of cut-out pipes 3 (an example of “cut-out pipe” described in the claims of the present application), a plurality of motors 4-1, and a plurality of drive gears 4. -2, a plurality of weighing buckets 5 (an example of a "weighing bucket" described in the claims of the present application), a plurality of measuring instruments 7, and a plurality of sub-buckets 9 (an example of a "sub-bucket" described in the claims of the present application) And a chute 11. The weighing bucket 5 has a first open / close damper 13. The sub bucket 9 has a second open / close damper 15. Further, the cutting pipe 3 has an annular gear 17.

  The cut-out weighing device 1 cuts out the objects to be weighed in a fixed amount. The cutting pipe 3 rotates to cut out an object to be weighed from the hopper 2. The drive gear 4-2 is fitted to the annular gear 17 and transmits the power of the motor 4-1 to the annular gear 17 to rotate the cutting pipe 3. Each cutout pipe 3 has a corresponding weighing bucket 5 and one sub-bucket 9 on the downstream side. Each weighing bucket 5 is connected to a corresponding weighing device 7. The weighing bucket 5 temporarily stores an object to be weighed cut out from the corresponding cut-out pipe 3. The measuring device 7 measures the object to be weighed stored in the corresponding measuring bucket 5. The sub-bucket 9 accommodates the weighing object from the weighing bucket 5 after the weighing is completed, and discharges the weighing object in accordance with the timing of the downstream process. For example, if the downstream process is a packaging machine, when the packaging bag is conveyed to the outlet of the chute 11, the plurality of second open / close dampers 15 are opened at different timings, and the chute 11 is directed toward the packaging machine. Discharge the objects to be weighed one by one. The chute 11 is on the downstream side of the plurality of sub-buckets 9 as shown in (b) and guides the objects to be weighed discharged from the sub-buckets 9 to the downstream process.

  Hereinafter, a cut-out weighing method using the cut-out weighing device 1 (an example of the “cut-out weighing method” described in the claims) will be described with reference to FIG. FIG. 2 is a flowchart showing an example of the cut-out weighing method according to the embodiment of the present invention. Here, it is assumed that there is a packaging machine downstream of the chute.

  In step S01, the weighing instrument is turned on. When the weighing instrument is stabilized in step S02 and the weighing instrument is ready for weighing, the cutting pipe starts rotating in step S03, and the object to be weighed is cut into the weighing bucket. In step S04, when the weighing instrument senses that the object to be weighed in the weighing bucket has reached the set weight, the cutting pipe stops rotating. In step S05, the weighing instrument again weighs the objects to be weighed in the weighing bucket. In step S06, the weighing bucket opens the first open / close damper and immediately discharges the object to be weighed to the sub bucket. When the weighing bucket closes the first open / close damper, the cutting pipe immediately starts a cutting step for the next object to be weighed (start of step S02 for the next object to be weighed).

  In step S07, the sub-bucket discharges the objects to be weighed stored in step S06 to the chute in accordance with the timing when the packaging machine carries the packaging bag. Moreover, it adjusts so that the timing which discharges | weighs a to-be-measured item to a chute | shoot does not overlap a some sub bucket.

  The steps from Step S02 to Step S06 are executed regardless of the timing of the other cut-out pipe systems. For this reason, the cutting pipe rotates in relation to other systems compared to the conventional system in which the weighed material discharged from the weighing buckets of other systems is stopped until the weighing object is discharged from the chute. Time to stop is shortened. Conventionally, the number of cuts with one pipe has been limited to 30 times per minute. According to the method of this embodiment, the cutting speed can be improved up to 70 times or more per minute.

  Step S05 is a process for detecting defective products. As a result of the weighing in step S05, an object to be weighed that is outside the set weight range is handled as a defective product in a downstream process. Further, the container of the object to be weighed prepared by the packaging machine under the chute may be other than a bag such as a cup, a tray, or a box.

  Steps S03 and S04 are examples of the “cutout step” described in the claims of the present application, Step S05 is an example of the “metering step” described in the claims of the present application, and the step S06 is the “recontainment step” described in the claims of the present application. Step S07 is an example of the “discharge step” described in the claims of this application.

  FIG. 3 is a flowchart showing another example of the cut-out weighing method according to the embodiment of the present invention. In step S04 'of the flow of FIG. 3, unlike the step S04 of the flow of FIG. 2, when the cutting pipe rotates at a predetermined speed for a predetermined time, the rotation stops and the step ends. Steps S05 to S07 are the same as the flow in FIG.

  In this embodiment, it is assumed that a predetermined amount is cut out by rotating the cutting pipe at a predetermined speed for a predetermined time. Therefore, the measuring instrument is necessary for checking the weight in step S05, but is not necessary in the previous cutting step. That is, step S01 'and step S02' may be completed before step S05. Therefore, the steps relating to the measuring instrument in step S01 'and step S02' and the steps relating to the cutting pipe in step S03 'and step S04' can be simultaneously advanced. As a result, the rotation stop time of the cut-out pipe can be shortened by about 200 milliseconds to 600 milliseconds in steps S01 and S02 compared to the flow in FIG.

  Further, step S03 'and step S04' are examples of the "cutout step" described in the claims of the present application.

  FIG. 4 is a diagram showing an outline of the cut-out weighing device 21 according to the embodiment of the present invention. Hereinafter, an outline of the cut-out weighing device 21 of FIG. 4 will be described.

  Referring to FIG. 4, the cutting and weighing device 21 includes a hopper 23, a cutting pipe 25, a receiving roller 27, a motor 29, a drive gear 31, a weighing bucket 35, a weighing instrument 37, and a chute 39. Prepare. The cutting pipe 25 includes an annular gear 41 and a cylinder 43.

  The cut-out weighing device 21 cuts out an object to be weighed. The hopper 23 supplies an object to be weighed to the cutting pipe 25. The cutting pipe 25 is not a double cylinder but a single cylinder, and rotates to cut out the objects to be weighed in a fixed amount. The weighing bucket 35 temporarily stores the cut-out weighing object. The weighing device 37 measures the object to be weighed stored in the weighing bucket 35. The chute 39 receives an object to be weighed in the weighing bucket 35 that has been weighed, and guides it to the downstream of, for example, a packaging machine.

  The four receiving rollers 27 support the cutting pipe 25 so as to be rotatable. The annular gear 41 is fixed to the outer peripheral surface of the cutting pipe 25. The drive gear 31 is engaged with the annular gear 41 and transmits the power of the motor 29 to the annular gear 41 to rotate the cutting pipe 25.

  The cut-out pipe 25 is fixed only by the drive gear 31 from above. Thus, by fixing the upper part of the cutting pipe 25 only at one place, it becomes easy for the cutting pipe 25 to move following the swing of the hopper 23. If the hopper is removed, the cutting pipe 25 can be easily removed from the weighing device 21 by simply pulling it in the direction of the arrow A.

  FIG. 5 is a diagram showing an outline of the cutting pipe 25 in the cutting weighing device 21 of FIG. 4, (a) a state where the annular gear 41 is fixed, and (b) a state where the annular gear 41 is removed. .

  Referring to FIG. 5A, the cut-out pipe 25 is configured by fixing an annular gear 41 to a cylinder 43 by a screw method. Further, as shown in FIG. 5B, the outer peripheral surface of the cylinder 43 is threaded and is threaded in the direction opposite to the rotation direction of the cylinder 43. Accordingly, it is possible to fix the annular gear 41 so that the annular gear 41 is not detached from the cutting pipe 25 without fixing the annular gear 41 by caulking.

  Further, the annular gear 41 is made of resin at least at a portion in contact with the drive gear 31. On the other hand, the drive gear 31 is made of metal at least in contact with the annular gear 41.

  Since the toughness of the material of the annular gear 41 is smaller than the toughness of the material of the drive gear 31, the deterioration of the drive gear 31 can be minimized, and maintenance and management of only the annular gear 41 can be achieved. Moreover, since the annular gear 41 is a part of the cut-out pipe 25 that can be easily removed and is fixed by a screw method, the replacement work is also easy.

  FIG. 6 is a photograph of a part of the cut-out weighing device 21 according to the embodiment of the present invention, where (a) is a photograph of the cut-out pipe rotating, and (b) is a photograph showing the cut-out pipe removed.

  In FIG. 6A, many side surfaces of the cut-out pipe are exposed. In the state (b) in which the cutting pipe is removed, a gap between the two receiving rollers that support the cutting pipe is exposed. Thus, in the cut-out weighing device of the present invention shown in FIG. 6, the exposed part is larger than the conventional one shown in FIG. Therefore, there are many parts that can be cleaned without disassembling, and maintenance management such as cleaning of the apparatus is easier than before.

DESCRIPTION OF SYMBOLS 1 ... Cut-out weighing device, 2 ... Hopper, 3 ... Cut-out pipe, 4-1 ... Motor, 4-2 ... Drive gear, 5 ... Measuring bucket, 7 ... Weighing 9 ... sub bucket, 11 ... chute, 13 ... first opening / closing damper, 15 ... second opening / closing damper, 17 ... annular gear, 21 ... cutting weighing device, 23 ... Hopper, 25 ... Cutting pipe, 27 ... Receiving roller, 29 ... Motor, 31 ... Drive gear, 35 ... Measuring bucket, 37 ... Measuring instrument, 39 ... Chute 41 ... annular gear 43 ... cylinder 51 ... outer cylinder 53 ... bearing 55 ... gear 57 ... inner cylinder 59 ... cutting pipe

Claims (8)

A cut-out weighing device for cutting out an object to be weighed,
A plurality of cutting pipes for cutting out the weighing object,
For each of the plurality of cutting pipes,
A weighing bucket for storing the object to be weighed during weighing;
In addition to the weighing bucket, a cut-out weighing device comprising a sub-bucket for storing the weighing object that has been weighed in the weighing bucket. A cut-out weighing method using a cut-out weighing apparatus for cutting out an object to be weighed,
The cutting and weighing device is
A plurality of cutting pipes for cutting out the weighing object,
For each of the plurality of cutting pipes,
A weighing bucket for storing the object to be weighed during weighing;
In addition to the weighing bucket, a sub-bucket for storing the weighing object that has been weighed in the weighing bucket,
A cutting step of cutting the object to be weighed from the cutting pipe into the weighing bucket;
A weighing step for weighing the objects to be weighed contained in the weighing bucket;
A re-accommodating step of re-accommodating the object to be weighed from the weighing bucket to the sub-bucket,
The cut-out weighing method, wherein the next cut-out step is started while the sub-bucket accommodates the object to be weighed. Between the extraction step and the re-containment step,
The cut-out weighing method according to claim 2, further comprising a sub-bucket discharge step of discharging the object to be weighed downstream from the sub-bucket.   4. In the cutting step, when the weighing device senses that the object to be weighed in the weighing bucket has reached a set weight, the cutting pipe stops cutting, and the cutting step ends. The cut-out weighing method described.   The cutout weighing method according to claim 2 or 3, wherein in the cutout step, when the cutout pipe rotates at a predetermined speed and / or for a predetermined time, the cutout pipe stops cutting and the cutout step ends. At least two receiving rollers for rotatably supporting the cutting pipe;
An annular gear which is a gear fixed so as to be removable from the outer peripheral surface of the cutting pipe;
A drive gear that is a gear that transmits the power of the motor to the annular gear;
The cut-out weighing device according to claim 1, wherein the cut-out pipe is not a double tube but a single tube.   7. The cutting and weighing apparatus according to claim 6, wherein the toughness of the material of the annular gear is smaller than the toughness of the material of the drive gear. The annular gear is
It is fixed to the cutting pipe by a screw method,
The cut-out weighing device according to claim 6 or 7, wherein the cut-out weighing device is threaded in a direction opposite to a rotation direction of the cut-out pipe.