JP2012217427A - Foreign matter sorter of laver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foreign matter sorter of laver that firstly has an excellent space aspect such as reduced installation space, etc., secondly achieves a precise detection and has excellent metal detection precision, thirdly improves treatment ability and fourthly is excellent in terms of cost and efficiency.SOLUTION: The foreign matter sorter 6 is used with a processing production process of laver A. The foreign matter sorter includes: a detection sensor 25 for detecting and sorting laver A to which metal C is attached that detects and sorts laver A to which impurities being foreign matter are attached; a control means; and a defect metal sorting means. The detection sensor 25 is made of reflection type, arranged opposed to the laver A to be conveyed and detects the metal C attached to the laver A. The control means controls the drive of the defect metal sorting means on the basis of the detected result of the detection sensor 25 and the defect metal sorting means sorts the laver A to which the metal C is attached.

Description

  The present invention relates to a laver foreign matter sorter. That is, the present invention relates to a foreign matter sorter that is used in the processing and manufacturing process of seaweed and detects and sorts seaweed to which impurities and metals are attached.

《Technical background》
On the seaweed picked from the sea and processed (manufactured by dry seaweed, hereinafter simply referred to as seaweed), impurities and metals are often attached as foreign matters.
That is, impurities such as straw, vinyl, bird feathers, shells, paper, wood chips, shrimp, insects, etc. are often attached. Also, iron, aluminum, copper, and other metal tooth spilled pieces, broken pieces, fine pieces, worn pieces, rust, fine powder, residue, etc. are often attached.
Contaminant adherence is due to the fact that the contaminants that have flowed into the sea are collected by adhering to the original algae when plucking the original algae cultured on the nets in the sea. Causes of metal adhesion include the use of a metal reaper when plucking algae from the sea, the subsequent cutting, washing, papermaking, dehydration, drying, etc. Can be mentioned.
And the seaweed processed and manufactured by adhering foreign substances and metals in this way has a problem in that it is used for food as it is, and is sorted and removed as post-processing after the processing and production line.

<Conventional technology>
That is, conventionally, for foreign matters, a dedicated foreign material sorter (contaminant sorter) has been used to detect and sort seaweed with the foreign matter attached. In addition, a shape and foreign matter sorter (contaminant sorter) that detects and sorts defective laver is also used.
On the other hand, for metals, a metal detector (metal sorter), which is a dedicated foreign matter sorter, is used to detect and sort seaweed with metal attached.
That is, as shown in FIGS. 4 (3) and 4 (4), in this conventional metal detector 1, the laver A that is transported and passed by the belt conveyor 2 is transferred to the transmission type detection sensor 3. The metal was detected, and based on this, the seaweed A to which the metal adhered was sorted by the defective metal sorting means 5 via the control means 4.
As described above, conventionally, a special foreign matter sorter (contaminant sorter) or a shape and foreign matter sorter is used for foreign matters, and a metal detector (metal sorter) that is a special foreign matter sorter for metals. 1 was used.
In addition, a type in which both were simply docked was also developed. That is, there is an integrated type in which the metal detector (metal sorter) 1 is simply connected before the (shape and) foreign matter sorter (contaminant sorter).

By the way, the following subject was pointed out about such a conventional metal detector 1. FIG.
<First problem>
First, problems were pointed out in terms of space. That is, in the conventional metal detector 1, since the detection is performed by the transmission type detection sensor 3, the space area for detection is widened, so that the roller conveyor cannot be used and the belt conveyor 2 is used. It was.
In other words, when a roller conveyor is arranged close to the front and rear with respect to the transmission type detection sensors 3 arranged above and below (close to the detection sensor 3 from the front and rear with a front-rear dimension smaller than the front-rear length dimension of one laver A1 If a roller conveyor is provided), the detection of the detection sensor 3 is affected and noise is caused. Therefore, conventionally, detection by the transmission type detection sensor 3 has been performed while the laver A is transported and passed through the belt conveyor 2 by a distance longer than the longitudinal dimension of the laver A.
Therefore, the detection sensor 3 itself takes a space in front and back and up and down in shape, so that the metal detector (metal sorter) 1 is increased in size as a whole, and the foreign matter sorter (contamination) There is a problem that it takes up a large installation space.
For the type in which the aforementioned (shape and) foreign matter sorter (contaminant sorter) and metal detector (metal sorter) 1 are simply docked back and forth and integrated into a single unit, the installation will be extended accordingly. Space issues were pointed out. In addition, since the metal detector (metal sorter) 1 is large in this way, attempts to incorporate it into a conventional (shape and) foreign matter sorter (contaminant sorter) have been regarded as difficult.

<< Second problem >>
Second, problems have been pointed out in metal detection accuracy. That is, since the conventional metal detector 1 is detected by the transmission type detection sensor 3, as described above, the space area for detection is wide and easily affected by nearby metal parts. .
The detection sensor 3 reacts to, for example, the metal mechanical part of the metal detector (metal sorter) 1 itself, a foreign matter sorter (contaminant sorter) installed nearby, other mechanical devices, etc., that is, nori In many cases, it reacts with and detects metal parts other than the metal attached to A. As a result, detection has become uncertain, noisy, and problems have been pointed out in terms of accuracy.

《Third problem》
Thirdly, problems have been pointed out in processing capacity. That is, since the conventional metal detector 1 detects and sorts the laver A while transporting and passing the laver A on the belt conveyor 2 as described above, the transport speed and the processing speed are limited.
In other words, laver A that is carried on the belt conveyor 2 is light and has unevenness, so if it is carried at high speed, it will float, wind up and scatter due to air resistance, etc., making the conveyance unstable. There was a fear. As a result, there are limits to the conveyance speed and processing speed, and the number of processed sheets is limited.

《Fourth problem》
Fourth, problems have been pointed out in terms of cost. That is, the conventional metal detector (metal sorter) 1 is formed separately from the (shape and) foreign matter sorter (contaminant sorter) and is used at the same time.
Therefore, for example, if the control means 4 such as a microcomputer can be shared, the cost can be reduced by that amount, and the selection prioritization control between the metal defect, the defect defect, and the shape defect can be improved for the laver A. Will be.
Therefore, the metal detector 1 (metal sorter) 1 and the (shape and) foreign matter sorter (contaminant sorter) are not simply docked in the front and rear as described above, but integrated into the metal detector 1. The appearance of a type that incorporates (in the shape and) in a foreign matter sorter was eagerly desired.

<< About the present invention >>
The seaweed foreign matter sorting machine of the present invention has been made to solve the above-described problems of the prior art in view of such a situation.
And, the present invention is firstly excellent in space, such as reduced installation space, and secondly, it can realize accurate detection, has excellent metal detection accuracy, and thirdly, the processing capability is improved, Fourthly, an object is to propose a foreign matter sorter for laver that is excellent in cost and efficiency.

<About each claim>
The technical means of the present invention for solving such a problem is as follows, as described in the claims.
About Claim 1, it is as follows.
The foreign matter sorter for laver according to claim 1 is used as an accessory to the processing and manufacturing process of laver, and can detect and sort the laver with foreign matter adhering to it, It can be detected and sorted. Therefore, a metal detection sensor is built in, the detection sensor is of a reflective type, and is disposed opposite to the laver being conveyed.
About Claim 2, it is as follows.
The foreign matter sorting machine for seaweed according to claim 2 comprises the light source, the camera, the control means, and the foreign matter defect sorting means for detecting and sorting the seaweed adhered to the seaweed in addition to the conveyor for transporting the seaweed. I have.
The light source is disposed opposite to the seaweed being conveyed. The camera receives irradiation light from the light source as reflected light or transmitted light through nori. The control means controls driving of the foreign object defect sorting means based on the detection result of the camera. The contaminant defect sorting means is characterized in that it can sort the laver adhering to the contaminant.

About Claim 3, it is as follows.
According to a third aspect of the present invention, there is provided a foreign matter sorting machine for seaweeds according to the second aspect, comprising the detection sensor, the control means, and the metal defect sorting means for detecting and sorting the seaweed to which metal has adhered.
And this detection sensor can detect the metal adhering to laver. The control means controls the driving of the metal defect sorting means based on the detection result of the detection sensor. The metal defect sorting means is characterized in that it can sort laver with metal attached.
About Claim 4, it is as follows.
The foreign matter sorting machine for seaweed according to claim 4 is characterized in that, in claim 3, the control means for seaweed to which impurities are attached and the control means for seaweed to which metal is attached are shared. To do.
About Claim 5, it is as follows.
The foreign matter sorter for laver according to claim 5 is the labyrinth separator according to claim 3, wherein the conveyor includes a roller conveyor before and after the detection sensor. And both said roller conveyors are made of resin, and are arranged in front and back through the detection sensor at a front and rear interval narrower than the front and rear dimensions of the seaweed being conveyed, .
About Claim 6, it is as follows.
The foreign matter sorting machine for seaweed according to claim 6 is characterized in that, in claim 5, the roller conveyor is composed of an upper pressing roller and a lower driving roller. The drive roller is provided with tapered end portions that have small diameters on the left and right sides, and the left and right sides are respectively held by the bearings on the shaft via the tapered end portions.
The bearing is characterized in that the shaft is held while facing the tapered end, and is fixed to the left and right side plates of the body.
About Claim 7, it is as follows.
According to a seventh aspect of the present invention, there is provided a laver foreign matter sorting machine according to the sixth aspect, wherein the driving roller is provided with a static electricity removing means for charged static electricity.

About Claim 8, it is as follows.
In the laver foreign matter sorting machine according to claim 8, in claim 3, the left and right side plates, the frame and the box of the body are insulated from each other, and the left and right side plates are divided and arranged in the conveying direction. And are insulated from each other. Further, at least the side plates located on the left and right sides of the detection sensor are made of resin.
About Claim 9, it is as follows.
According to a ninth aspect of the present invention, there is provided a foreign matter sorting machine for seaweed according to the third aspect, further comprising a light source for detection and sorting of defective seaweed, a camera, a control means, and a defective shape sorting means. Used as.
The light source is disposed opposite to the seaweed being conveyed. The camera receives irradiation light from the light source through laver. The control means controls the driving of the shape defect selection means based on the detection result of the camera, and the control means for the laver to which the above-mentioned impurities are adhered, and the control means for the laver to which the metal is adhered, Is shared. The shape defect sorting means is characterized in that it can sort a laver having a shape defect.

<About the action>
Since the present invention comprises such means, the following is achieved.
(1) The seaweed produced in the processing production process is sent to a foreign matter sorter.
(2) And the laver is transported by a conveyor built in the foreign matter sorter.
(3) Then, the seaweed to which impurities are attached is detected and selected.
(4) Furthermore, detection and selection of defective laver may be performed.
(5) Then, the seaweed with metal attached is detected and selected. That is, the detection sensor detects the metal adhering to the seaweed, and the control means controls the metal defect selecting means based on the detection result to select the seaweed with the metal attached.
(6) As described above, the foreign matter sorter of the present invention can detect and sort seaweed to which foreign matters are attached, and can detect and sort seaweed having a poor shape, and can also detect seaweed to which metal is attached. , It is possible to sort.
(7) The reasons why such detection and selection are possible are: a. The use of a reflective detection sensor that is small, flat, back and forth, and does not take up and down space for metal b. The reflection type has a narrow space area for detection, c. Therefore, a roller conveyor can be used for detection conveyance.
(8) In addition, since the reflective detection sensor has a small space area for detection, the influence and noise from nearby metal parts are reduced during detection.
(9) Further, the side plates, the frame, the box and the like are insulated from each other, and the side plates are further divided and insulated from each other. Further, at least the roller conveyor for detection conveyance and the left and right side plates are made of resin. Further, at least the driving roller of the roller conveyor is provided with static electricity removing means.
Since various measures for improving the detection accuracy are adopted, the influence and noise from the surroundings are reduced in the metal detection also from this aspect.
(10) In addition, a roller conveyor composed of an upper pressing roller and a lower driving roller is arranged in proximity to each other for detection conveyance. Therefore, during detection, floating, winding, scattering, and the like of the transported seaweed are avoided, so that the transport speed can be improved.
(11) Furthermore, it is possible to detect and sort seaweed to which foreign substances are attached, and it is also possible to detect and sort seaweed to which metal is attached, so that the configuration is simplified, for example, the control means is shared. . Furthermore, it is possible to perform control for preferential selection in the order of metal failure, contamination failure, and shape failure.
(12) Now, the laver foreign matter sorter of the present invention exhibits the following effects.

<< First effect >>
First, the space is excellent, for example, the installation space is reduced. In other words, the laver foreign matter sorter according to the present invention employs a reflection type detection sensor for detecting and sorting the laver adhered to the foreign metal.
The reflection type detection sensor is different from the transmission type used in this type of conventional example in that a. Small, flat and does not take up space, b. The spatial area for detection is narrow, c. Therefore, a roller conveyor can be used for detection conveyance instead of a belt conveyor as in the above-described conventional example.
As a result, the detection of laver with metal attached can be made compact without increasing the size, and in the present invention, it has been realized that it is incorporated in a single (shape and) foreign matter sorter together with foreign substances. Therefore, the installation space is greatly reduced compared to the conventional example. In the conventional example, compared with the case where two installation spaces are required for the foreign object and the metal, only one installation space for the foreign object is required, thereby saving space.

<< Second effect >>
Second, accurate detection can be realized and the metal detection accuracy is excellent. That is, in the laver foreign matter sorter according to the present invention, as described above, the reflection type detection sensor is employed, so that the space area for detection is narrow.
Therefore, when detecting seaweed to which metal is attached, the risk of detecting this by reacting with metal parts other than metal attached to seaweed is reduced as compared with the above-described conventional transmission type. At the same time, the body side plate, frame, and box are insulated and the side plate is divided and insulated as measures for improving detection accuracy and measures for malfunction. In addition, at least the roller conveyor for detection and conveyance by the detection sensor and the left and right side plates of the detection sensor are made of resin. Furthermore, static elimination means is attached to the driving roller of the roller conveyor.
As a result, the present invention is superior in accuracy, such as detection and sorting of laver with metal attached, which can be accurately realized with less noise than this type of conventional example.

《Third effect》
Third, the processing capacity is improved. That is, in the laver foreign matter sorter according to the present invention, as described above, a reflective detection sensor is used for detection of laver with metal attached, and a roller conveyor is used for detection and conveyance thereof. . The roller conveyor conveys the laver sandwiched from above and below at narrow intervals.
Therefore, as in this type of conventional example in which a belt conveyor is used, the risk of floating, rolling up and scattering of laver transported for metal detection is avoided, and reliable transport and high-speed transport of laver is avoided. Realized. In this way, when detecting and sorting the laver with the metal attached, the processing ability is improved and the workability is improved, for example, the processing is stable and the number of processed sheets is increased.

<< 4th effect >>
Fourth, it is excellent in terms of cost and efficiency. That is, the foreign matter sorter for laver according to the present invention is a separate metal detector (metal sorter) in the above-mentioned conventional example. Built-in and fully integrated.
Therefore, the control means and others are shared, and the cost is reduced by the shared components rather than providing them separately, thereby realizing a low price. Furthermore, prioritization control can be performed in which priority selection is performed in the order of metal defects in the seaweed, contamination defects, and shape defects, thereby improving efficiency.
As described above, the effects exerted by the present invention are remarkably large, such as all the problems existing in this type of conventional example are solved.

It is a side explanatory view which expanded a principal part for explanation of a form for carrying out the invention about a foreign matter sorter for laver concerning the present invention. It is used for description of the form for implementing this invention, and is the whole side surface explanatory drawing. It uses for description of the form for implementing this invention, shows a roller conveyor, a static elimination means, etc., (1) A figure is a front view, (2) A figure is a top view of the principal part. FIGS. (1) and (2) are used to explain the embodiment for carrying out the invention, and show a detection sensor and the like, (1) is a schematic side view, and (2) is a schematic perspective view. (3) FIG. 4 and FIG. 4 (4) are used to explain this type of conventional example, showing the detection sensor and the like. (3) FIG. 4 is a schematic side view, and (4) is a schematic perspective view.

Hereinafter, embodiments for carrying out the present invention will be described in detail.
<< Outline of Foreign Substance Sorter 6 >>
First, the outline | summary of the foreign material separator 6 of this invention is demonstrated with reference to FIG. This foreign matter sorter 6 is used as an accessory to the processing and manufacturing process of nori A, and can detect and sort the nori A to which foreign matters B adhere, and nori A to which foreign metal C adheres. Can be detected and sorted.
The seaweed (that is, dry seaweed) A manufactured in the manufacturing process has a rectangular sheet shape with a length dimension of 210 mm, a (left and right) width dimension of 190 mm, and a thickness of about 0.2 mm.
And nori, such as foreign matter B and metal C, may have adhered to the front, back, and inside (inside) of laver A. Detection, sorting, and removal of Nori A are performed.
For the foreign matter B and metal C, refer to the above-mentioned place. In the present specification, the term “adhesion” is used in the meaning including mixing.
By the way, the illustrated foreign material sorter 6 can further detect, sort and remove the laver A having a defective shape D, and is used as a so-called shape and foreign matter sorter. The shape defect D means various shapes other than the above-mentioned standards, large and small dimensions, and tears and holes.
The body of the foreign matter sorter 6 is assembled on a pedestal frame 7 with wheels as a whole. Reference numeral 8 denotes side plates on the left and right sides of the body. The left and right side plates 8 are each erected and held on a pedestal frame 7, and a connecting frame (not shown) is spanned between them.
In the figure, 9 is an operation box erected on the body, and 10 is a camera mounting box erected in the same manner. The operation box 9 is provided with various switches and a display unit, and incorporates control means to be described later.
The outline of the foreign matter sorter 6 is as described above.

<< Conveyor 11 >>
Next, the conveyor 11 incorporated in the body of the foreign material sorter 6 will be described with reference to FIG. The seaweed A is horizontally conveyed in the foreign matter sorter 6 by the conveyor 11 held between the left and right side plates 8.
That is, in the foreign matter sorter 6, the belt conveyor 12 group, the pair of roller conveyors 13, the belt conveyor 12, the roller conveyor 13, and the belt conveyor 12 are directed from the upstream side to the downstream side along the transport direction E, that is, the front-rear direction. , Belt conveyors 12 and the like are arranged in order with predetermined intervals.
Each of the belt conveyor 12 and the roller conveyor 13 constituting the conveyor 11 is connected to a driving source such as a motor via a timing belt or the like, and includes a driving belt and a driving roller 14 that are driven and rotated. The laver A is loaded and transported.
As the driving belt of the belt conveyor 12, a flat belt or a string belt is appropriately selected and used. Further, the most upstream belt conveyor 12 is an alignment conveyor, and a vertical belt conveyor 15 for restricting the right and left of the laver A is attached to both the left and right sides.
Reference numeral 16 denotes a press roller, which is a free roller that is not driven, and is disposed on the drive belt of the belt conveyor 12 or the drive roller 14 of the roller conveyor 13 so as to face each other. Thus, the seaweed A to be transported is stably transported by pressing from the surface side.
About the conveyor 11, it is as above.

<< Detection and sorting of impurities B >>
Next, detection and selection of the laver A to which the foreign matter B adheres will be described with reference to FIG. The foreign matter sorter 6 includes a light source 17 for detecting and sorting the laver A to which the foreign matter B adheres, a camera 18, a control means 19, and a foreign matter defect sorting means 20.
The light source 17 is disposed opposite to the seaweed A to be conveyed. The camera 18 receives the irradiation light from the light source 17 as reflected light or transmitted light through the laver A. The control means 19 controls the driving of the foreign object defect sorting means 20 based on the detection result of the camera 18. The foreign matter defect sorting means 20 can sort the laver A to which the foreign matter B adheres.

These will be described in further detail. First, as the light source 17, in order from the upstream side, the light source 17 ₁ for detecting the middle adhering contaminant B that irradiates the interval between the belt conveyors 12 from the lower side, and then the surface adhering contamination that irradiates the upper side of the belt conveyor 12 from the upper side. light source 17 2 for the detection of objects _{B, and,} the back attachment contaminants light source 17 ₃ for the detection of B for irradiating the distance between the belt conveyor 12 from the lower side, are provided. As each of the light sources 17 ₁ , 17 ₂ , and 17 ₃ , a high-frequency fluorescent lamp or an LED is selectively used.
Along with this, a camera 18 made of, for example, a CCD line image sensor is provided corresponding to such a light source 17.
That is, a camera 18 ₁ capable of receiving the irradiation light from the light source 17 ₁ (transmitted light from the conveyed laver A) is provided on the upper side. Further, the irradiation light of the reflected light from the light source 17 ₂ (reflected light from seaweed A surface to be conveyed), is capable of receiving light camera 18 ₂ is provided on the upper side. Further, the irradiation light from the light source 17 ₃ (reflection light from seaweed A backside being conveyed), is capable of receiving light camera 18 ₃ is provided on the lower side.
The cameras 18 ₁ , 18 ₂ , and 18 ₃ photoelectrically convert the received transmitted light and reflected light and send the detected light amount to the control means 19.
The control means 19 discriminates the detected light quantity, and outputs a drive signal to the shutter of the foreign object defect sorting means 20 when the discriminated detected light quantity exceeds a preset reference value. The seaweed A to which is attached is selected and removed. Reference numeral 21 denotes a bucket that collects the laver A that has been sorted and removed by the foreign matter defect sorting means 20, that is, the laver A to which the foreign matter B has adhered.
The detection and sorting of the foreign matter B are as described above.

<< Detection and selection of defective shape D >>
Next, detection and selection of laver A having a defective shape D will be described with reference to FIG. The illustrated foreign matter sorter 6 further includes a light source L for detecting and sorting the laver A having a defective shape D, a camera 22, a control means 19, and a defective shape sorter 23, and is thus used as a shape and foreign matter sorter. Is done.
The light source L is disposed opposite to the laver A to be conveyed. The camera 22 receives the irradiation light from the light source L through the laver A. The control means 19 controls the driving of the shape defect sorting means 23 based on the detection result of the camera 22, and the control means 19 for the laver A to which the above-described foreign matter B adheres, and the laver A to which the metal C to be described later adheres. And the control means 19 for use. The shape defect sorting means 23 can sort the laver A having the shape defect D.
That is, the light source L irradiates the space between the uppermost belt conveyor 12 and the next belt conveyor 12 from the lower side. Corresponding to the light source L, a camera 22 capable of receiving the irradiation light from the light source L (passing light through the laver A) is provided on the upper side. The configurations and functions of the light source L and the camera 22 are the same as those of the light source 17 and the camera 18 described above.
When the detected light amount received by the camera 22 exceeds the set reference value, the control means 19 outputs a drive signal to the shutter of the shape defect sorting means 23 to sort out and remove the laver A having the shape defect D. . Reference numeral 24 denotes a bucket, and the laver A thus selected and removed as the defective shape D is collected.
The detection and selection of the shape defect D are as described above.

<< About the detection and selection of metal C >>
Hereinafter, detection and selection of laver A to which metal C has adhered will be described. First, the outline will be described with reference to FIG.
As described above, the foreign matter sorter 6 can detect and sort the laver A to which the foreign matter B adheres, and can detect and sort the laver A to which the metal C adheres. Accordingly, a metal C detection sensor 25 is built in, and the detection sensor 25 is of a reflective type and is disposed opposite to the laver A to be conveyed.
That is, the foreign matter sorter 6 includes a detection sensor 25 for detecting and sorting the laver A to which the metal C adheres, a control means 19, a metal defect sorting means 26, and the like. The detection sensor 25 can detect the metal C attached to the laver A. The control unit 19 controls the drive of the metal defect selection unit 26 based on the detection result of the detection sensor 25. The metal defect sorting means 26 can sort the laver A to which the metal C is attached.
Note that the control means 19 includes the control means 19 for the laver A to which the contaminant B is attached, the control means 19 for the seaweed A to which the metal C is attached, and the shape defect D described above in the illustrated example. The control means 19 for the seaweed A is shared, that is, shared.
The outline of detection and selection of metal C is as described above.

<< Details of metal C detection and selection >>
Next, details of the detection and selection of the laver A to which the metal C adheres will be described with reference to FIGS. 1, 2, 3, and 4 (1) and (2).
First, the detection sensor 25 is as follows. The detection sensor 25 is disposed between the pair of front and rear roller conveyors 13 on the downstream side of the light source 17 and the camera 18 for the foreign matter B and the light source L and the camera 22 for the defective shape D described above. . And it is oppositely arranged by the up-and-down positional relationship which adjoins from the lower side with respect to the laver A conveyed, and it can contact up and down in the example of illustration.
The detection sensor 25 is of a known reflection type, and radiates high-frequency electromagnetic waves (magnetic field, magnetic flux), and detects changes in electromagnetic waves caused by reflection by iron or other metal C based on the incident electromagnetic waves. Is possible. When the metal C does not exist, there is no change in the electromagnetic wave (disturbance of the magnetic field or magnetic flux), and it is detected as it is emitted.
Therefore, a detection result determined by data processing of the induced electromotive force is sent to the control means 19. That is, when the processing data based on the detected change in the electromagnetic wave exceeds the reference value, a signal is output to the control means 19 that the metal C has been detected.
In order to implement such a configuration and function, the detection sensor 25 houses a pair of a transmission coil and a reception coil, a signal processing circuit, and the like in a casing.

Next, when a detection result indicating that the metal C has been detected is input from the detection sensor 25, the control unit 19 outputs a drive signal to the shutter of the metal defect sorting unit 26, so that the seaweed A to which the metal C is attached is output. Sort and remove. A bucket 27 collects the laver A that has been sorted and removed by the defective metal sorting means 26, that is, the laver A to which the metal C has adhered.
By the way, the control means 19 is commonly used for a metal C defect, a contaminant B defect, and a shape defect D. Therefore, when one of the laver A is detected in duplicate, the metal C defect is given the highest priority, the next is the contaminant B defect, and then the shape defect D.
In other words, when a metal C detection signal is input from the detection sensor 25, the control unit 19 gives a signal to the metal defect sorting unit 26 in preference to the other. When the metal C detection signal is not input from the detection sensor 25, a signal is output to the foreign matter defect sorting means 20. When both are not present, signal output to the shape defect sorting means 23 is performed for the first time.
Details of detection and selection of metal C are as described above.

<< Measures to improve detection accuracy of detection sensor 25 >>
Next, a measure for improving the detection accuracy by the detection sensor 25 will be described with reference to FIGS.
The detection sensor 25 detects the metal C attached to the laver A. In view of this, countermeasures for malfunctions 1, 2, and 3 are adopted so that the detection sensor 25 reacts to other than the metal C adhering to the laver A at the time of detection and is not affected by the reaction.

About measure 1, it is as follows. First, the foreign matter sorter 6 is insulated from each other for the left and right side plates 8 of the body, the base frame 7, the other frames, the operation box 9, the camera mounting box 10, the distribution box, and the like shown in FIG. Yes.
For example, between the side plates 8 and the base frame 7, between the connecting frame and the side plate 8 (connection frame between the left and right side plates 8, connecting the side plates 8 ₄ for example between the side plates ₈₂ of the left and right or right and left), side plates 8 and operation Between the boxes 9, between the side plate 8 and the camera mounting box 10, etc., the connection points are electrically insulated.
At the same time, the left and right side plates 8 are divided forward and backward in the transport direction E, respectively, and the divided side plates 8 ₁ , 8 ₂ , 8 ₃ , 8 ₄ , 8 ₅ are electrically insulated from each other. Has been.
As described above, the side plate 8, the base frame 7, other frames, the operation box 9, the camera mounting box 10, and the like, such as members having many metal parts such as metal plates, are electrically insulated. By such countermeasure 1, the spread of the metal part that may affect the detection and reaction of the detection sensor 25 is suppressed by electrical insulation.

Next, measure 2 is as follows. The front and rear conveyors 11 for conveyance at the time of detection by the detection sensor 25 are composed of roller conveyors 13 as shown in FIGS. 1, 2, and 3, respectively. The upper pressing roller 16 and the lower driving roller 14 are respectively provided. Is made of resin including the shaft 28.
Further, in the illustrated example, the driving roller 29 of the belt conveyor 12 before and after the roller conveyor 13 (the driving roller 29 on the roller conveyor 13 side) is also made of resin including the shaft 30.
Further, side plates 8 ₃ located on the left and right of the at least detection sensor 25 is made of resin. That side plate 8 are normally made of metal plate, at least the side plate 8 ₃ is made of resin plate.
As described above, in the countermeasure 2, the nearby conveyor 11 and the side plate 8 that have an influence on the detection of the detection sensor 25 and may react are made of resin instead of metal.

Next, measure 3 is as follows. As shown in FIGS. 1 and 3, the driving rollers 14 and 29 of the roller conveyor 13 and the belt conveyor 12 described above are provided with a static eliminating means T for charged static electricity.
That is, the drive roller 14 made of resin is caused by the contact friction between the low-conductivity materials with the upper resin presser roller 16, and the drive roller 29 is caused by contact friction between the low-conductivity materials with the belt. Furthermore, it is easily charged with static electricity due to the charge transmitted from the entire conveyor 11 or the charge of the dried laver A itself.
Then, the charged static electricity present in the vicinity affects the detection and reaction of the detection sensor 25 by discharge as electrostatic noise.
Therefore, the drive rollers 14 and 29 are provided with a static elimination means T. The neutralizing means T in the illustrated example is made of a conductive string, and is attached along the axial direction to the lower position of the roller body of the drive rollers 14 and 29 and is grounded.
Of course, the static elimination means T may be attached to the side positions of the drive rollers 14 and 29 without depending on the illustrated example, and a brush material, a belt material or the like can be used regardless of the string material. Furthermore, the drive rollers 14 and 29 may be partially in contact with each other regardless of the overall attachment.
The roller bodies of the drive rollers 14 and 29 are in the form of one long column and have a large contact area with the laver A. Thus, the neutralizing means T is provided, but the presser roller 16 is For example, it has a shape of two short cylindrical rings, and since the contact area with the laver A is small (see FIG. 3 (1)), the effect of charging is small, so the static elimination means T is not provided. .

By the way, the following countermeasure 4 can also be considered. This measure 4 is aimed at improving detection accuracy like the measures 1, 2 and 3 described above, but is different from the measures 1, 2 and 3 and is conveyed when detected by the detection sensor 25. It consists of means for bringing the passing seaweed A to be detected in close contact with the detection sensor 25.
That is, in measure 4, in consideration of the presence of irregularities in the laver A, an air outlet is provided opposite to the detection sensor 25, and the laver A to be detected is flattened, so that the detection sensitivity and the detection accuracy are improved. Improve.
The measures for improving the detection accuracy by the detection sensor 25 are as described above.

<< Measures for Strengthening Resin Drive Rollers 14 and 29 >>
Next, a measure for improving the strength of the resin drive rollers 14 and 29 will be described with reference to FIG.
As described above, the conveyor 11 includes the roller conveyors 13 before and after the detection sensor 25. The two roller conveyors 13 include the upper pressing roller 16 and the lower driving roller 14, and both are made of resin. Note that the two roller conveyors 13 are arranged in front and rear through a detection sensor 25 with a front-rear distance dimension narrower than the front-rear length dimension of the seaweed A being conveyed.
On the other hand, as described above, the driving rollers 29 of the belt conveyor 12 positioned before and after the roller conveyor 13 are also made of resin.
Therefore, with the aim of improving the strength of the resin driving rollers 14 and 29, the driving rollers 14 and 29 are respectively formed with tapered end portions 31 and 32 having a small diameter toward the left and right, respectively. The bearings 33 and 34 are held by shafts 28 and 30 via the tapered end portions 31 and 32, respectively.
Bearing 33 of the left and right roller conveyor 13, respectively, together with the face in contact with the tapered end 31 while holding the shaft 28 is fixed to the side plate 8 ₃ of the left and right body. Further, the bearing 34 of the left and right belt conveyor 12, respectively, together with the face in contact with the tapered end 32 while holding the shaft 30 is fixed to the side plate 8 ₃ of the left and right body.

In this way, the tapered end portions 31 and 32 having a truncated cone shape are formed, and the bearings 33 and 34 are brought into contact with the end edges of the tapered end portions 31 and 32 so as to face each other, thereby reducing stress concentration. Thus, stress deformation and stress breakdown of the drive rollers 14 and 29 are prevented.
If the drive rollers 14 and 29 are composed only of the roller body, the tapered ends 31 and 32 are not present, and the bearings 33 and 34 hold only the shafts 28 and 9 away from the roller body, It becomes like this.
In this case, the stress generated in the connected portion where the shape (diameter dimension) changes extremely from the large diameter roller body of the drive rollers 14 and 29 to the small diameter shaft 28 or 30 becomes a sudden shape change. It increases locally. At the same time, since the rigidity and strength are made of resin, which is inferior to that of metal, the connected portion may be deformed or damaged, and for example, the seaweed A being conveyed may meander and fall off.
On the other hand, the risk of such deformation and breakage is avoided based on the formation of the tapered end portions 31 and 32 and the setting of the bearings 33 and 34 described above.
The measures for improving the strength of the resin drive rollers 14 and 29 are as described above.

《Action etc.》
The foreign matter sorter 6 for laver A of the present invention is configured as described above. Therefore, it becomes as follows.
(1) The seaweed A manufactured in the processing and manufacturing process is sent to the foreign matter sorting machine 6 in the post-process and post-processed.

  (2) In the foreign matter sorter 6, the laver A is conveyed by the built-in conveyor 11. That is, the foreign material sorter 6 is horizontally conveyed in the conveying direction E by the belt conveyor 12 and the roller conveyor 13 (see FIG. 2).

(3) The foreign matter sorter 6 detects and sorts the laver A to which the foreign matter B adheres with respect to the laver A thus transported.
That is, the light emitted from the light sources 17 ₁ , 17 ₂ , and 17 _{3 is} received by the cameras 18 ₁ , 18 ₂ , and 18 ₃ as reflected light or transmitted light through the laver A. Then, the control means 19 controls the foreign matter defect sorting means 20 based on the detection result of the camera 18 so that the laver A to which the foreign matter B adheres is sorted and removed (see FIG. 2).

(4) Moreover, in the foreign material sorter 6 of the example of illustration, the nori seaweed A of the shape defect D is detected and selected about the nori seaweed A conveyed.
That is, the light emitted from the light source L is received by the camera 22 via the seaweed A, and based on the detection result, the control means 19 controls the shape defect sorting means 23 to select and remove the seaweed A having the shape defect D. (See FIG. 2).

(5) Further, in the foreign matter sorter 6, the nori A to which the metal C adheres is detected and sorted with respect to the nori A to be conveyed.
That is, the detection sensor 25 can detect a change caused by the metal C adhering to the laver A based on radiation and incident electromagnetic waves (magnetic field, magnetic flux). And the control means 19 controls the metal defect sorting means 26 based on the detection result, so that the laver A to which the metal C adheres is sorted and removed (see FIG. 2).

(6) Now, according to the foreign matter sorter 6 of the present invention, it is as follows. First, the foreign matter sorter 6 can detect and sort the seaweed A to which foreign matters B adhere, and in the illustrated example, it can detect and sort the seaweed A having a defective shape D, and also a metal that is foreign matter. Nori A with C attached can also be detected and selected.
In other words, the foreign matter sorter 6 incorporates the device for the foreign matter B and the device for the metal C, which have been separated in the past (shape and shape) into one unit (see FIG. 2). Therefore, the installation space is reduced as compared with the case of separate.

(7) In this foreign matter sorter 6, the reason why it can be incorporated into one unit in this way is as follows (FIG. 4 (1), FIG. 4 (2) relating to the present invention and FIG. 3) Figure, (4) Figure, comparative control).
a. In the foreign matter sorter 6, a reflection type detection sensor 25 is used for detecting the metal C. The reflective type is smaller and flatter than the transmissive type, and does not take up space in the front-rear and top-bottom directions.
b. Furthermore, the reflection type detection sensor 25 has a narrow electromagnetic wave area (magnetic field, magnetic flux formation area) that is radiated, incident, and detected as compared with the transmission type.
c. With these a and b, the roller conveyor 13 can be used for detection conveyance. That is, as compared with the belt conveyor, the roller conveyor 13 needs to be disposed close to the front and rear of the detection sensor 25 at a front and rear interval narrower than the front and rear length dimension of one laver A1, but the reflection type a and b described above. This is made possible by the use of the detection sensor 25.

(8) In addition, the foreign matter sorter 6 employs a reflection type detection sensor 25 having a narrow electromagnetic wave area (magnetic field, magnetic flux formation area) that is thus radiated, incident and detected.
Therefore, when detecting the laver A to which the metal C is adhered, the influence and noise from the metal part near the detection sensor 25 are reduced.
For example, the detection sensor 25 reacts to a metal part other than the metal C attached to the seaweed A, such as a metal part of the foreign matter sorter 6 itself, a metal part of another mechanical device installed nearby, and various other metal parts. The possibility of detecting this is reduced (see FIG. 2).

(9) At the same time, in this foreign matter sorter 6, first, the side plate 8, the base frame 7, other frames, the operation box 9, the camera mounting box 10, etc. are mutually insulated. Moreover the side plates 8 are mutually _{8 1,} 8 _2, 8 ₃ while being _divided, 8 4, _{8 5} while are insulated. As a result, the spread of the conductive metal portion is suppressed (see FIG. 2).
Further, at least the front and rear roller conveyors 13 for conveying the laver A in the detection sensor 25 are made of a low conductive resin. Side plates 8 ₃ arranged on the left and right detection sensor 25 is also made of resin. As a result, there is no metal portion near the detection sensor 25 (see FIG. 2).
Furthermore, static elimination means T is attached to the driving roller 14 of the roller conveyor 13 and the driving roller 29 of the belt conveyor 12. Therefore, there is no charged static electricity near the detection sensor 25 (see FIGS. 1 and 3).
As described above, various measures for improving detection accuracy and countermeasures for malfunction are adopted, so that the possibility of receiving influence and noise from the surroundings when detecting and sorting the metal C adhering to the laver A is greatly reduced.

(10) In this foreign material sorter 6, since the reflection type detection sensor 25 is employed, the roller conveyor 13 can be used for conveyance at the time of detection by the detection sensor 25.
The roller conveyor 13 is arranged in front of and behind the detection sensor 25 with a front-rear distance dimension that is narrower than the front-rear length dimension of the laver A, and includes an upper presser roller 16 and a lower drive roller 14 (FIG. 1). , See FIG. 2 and FIG. 3 (1)).
The seaweed A transported there is light and uneven, but is transported at a very close distance while being sandwiched from above and below by such a roller conveyor 13, so that it is lifted and rolled up by air resistance during detection. Thus, the risk of scattering is avoided. Therefore, the conveyance speed can be improved.

(11) The foreign matter sorter 6 can detect and sort the laver A to which the contaminants B adhere, and further the laver A having a defective shape D, and can also detect and sort the laver A to which the metal C adheres. It is.
Therefore, the control means 19 such as a microcomputer and others are shared, and the configuration is simplified by the shared amount rather than the two separate mechanical devices (see FIG. 2).
Furthermore, it is possible to control the prioritization of the detection and sorting of the seaweed A. That is, the damage to the laver A decreases in the order of the metal C defect, the contaminant B defect, and the shape defect D. And when these defects are detected in duplicate for one laver A, the ranking control is enabled by the common control means 19 for the first time.
That is, it is possible to perform control for preferential selection in the order of metal C defect, contaminant B defect, and shape defect D.
The operation of the present invention is as described above.

1 Metal detector (conventional example)
2 Belt conveyor (conventional example)
3 Detection sensor (conventional example)
4 Control means (conventional example)
5 Metal defect sorting means (conventional example)
6 Foreign object sorter 7 Pedestal frame 8 Side plate 8 ₁ side plate 8 ₂ side plate 8 ₃ side plate 8 ₄ side plate 8 ₅ side plate 9 Operation box 10 Camera mounting box 11 Conveyor 12 Belt conveyor 13 Roller conveyor 14 Drive roller 15 Vertical belt conveyor 16 Pressing roller 17 Light source 17 ₁ light source 17 ₂ light source 17 ₃ light source 18 camera 18 ₁ camera 18 ₂ camera 18 ₃ camera 19 control means 20 foreign matter defect sorting means 21 bucket 22 camera 23 shape defect sorting means 24 bucket 25 detection sensor 26 metal defect sorting means 27 Bucket 28 Shaft 29 Drive roller 30 Shaft 31 Tapered end portion 32 Tapered end portion 33 Bearing 34 Bearing A Nori B Contaminant C Metal D Shape failure E Transport direction L Light source T Static elimination means

Claims (9)

It is a foreign material sorter that is used in the processing and manufacturing process of seaweed, and can detect and sort seaweed to which foreign substances are attached, and can also detect and sort seaweed to which foreign metal is attached. And
A seaweed foreign matter sorter comprising a metal detection sensor built in, the detection sensor being made of a reflective type and disposed opposite to the transported seaweed. In claim 1, together with a conveyor for transporting seaweed, it has a light source, a camera, a control means, and a foreign matter defect sorting means for detecting and sorting seaweed with foreign matter attached thereto,
The light source is disposed opposite to the seaweed to be transported, and the camera receives the irradiation light from the light source as reflected light or transmitted light through the seaweed,
The control means controls the driving of the foreign matter defect sorting means based on the detection result of the camera, and the foreign matter defect sorting means is capable of sorting the laver adhering the foreign matter. Nori foreign material sorting machine. In claim 2, the detection sensor, the control means, the metal defect sorting means for detecting and sorting the seaweed with metal attached,
The detection sensor can detect the metal adhering to the laver, the control means controls the drive of the metal defect sorting means based on the detection result of the detection sensor, and the metal defect sorting means Nori foreign matter sorting machine, characterized by being able to sort out nori.   4. The seaweed foreign matter sorter according to claim 3, wherein the control means for laver to which impurities are attached and the control means for laver to which metal is attached are shared.   4. The conveyor according to claim 3, wherein the conveyor is provided with roller conveyors before and after the detection sensor, and both the roller conveyors are made of resin, and the detection sensors are arranged at a front-rear interval smaller than the front-rear dimension of the seaweed to be conveyed. A foreign matter sorting machine for laver, characterized in that it is arranged before and after. In claim 5, the roller conveyor is composed of an upper pressing roller and a lower driving roller, the driving roller is provided with tapered ends on the left and right, the diameter of which decreases toward the left and right. It is held on the bearing by the shaft through the taper end,
The seaweed foreign matter sorter characterized in that the bearing holds the shaft while facing the tapered end, and is fixed to the left and right side plates of the body.   7. The seaweed foreign matter sorter according to claim 6, wherein the driving roller is provided with a static eliminating means for charged static electricity.   In claim 3, the left and right side plates, the frame, and the box of the body are insulated from each other, and the left and right side plates are separately arranged in the conveying direction, and are insulated from each other. The laver foreign matter sorting machine is characterized in that at least the side plates located on the left and right sides of the detection sensor are made of resin. In claim 3, further comprising a noble shape nori detection, a light source for sorting, a camera, a control means, a shape defect sorting means, and thus used as a shape and foreign matter sorter,
The light source is disposed opposite to the nori to be transported, the camera receives irradiation light from the light source through the nori, and the control means is configured to detect the shape defect sorting means based on the detection result of the camera. The drive is controlled, and is shared with the control means for laver to which the above-mentioned impurities are attached, and the control means for laver to which metal is attached,
A foreign matter sorter for laver, wherein the poor shape sorting means is capable of sorting laver with poor shape.

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