JP2007298296A - Metal detector for rod-shaped food and rod-shaped food shipping apparatus equipped therewith - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To be resistant to material effect without changing the incoming and outgoing angles of rod-shaped food to improve detection sensitivity to pieces of metal. <P>SOLUTION: A detection means 16 is arranged on a stand 17 so that a detection coil 16a is angled at a first tilt angle α in the plan view with respect to a transfer direction X of a transfer means 15. The first inclination angle α is changeable. An angle regulation means 14 is provided which changes the angle of the rod-shaped food 2 input to the transfer means 15 nearly perpendicularly with respect to the transfer direction X so that the rod-shaped food 2 enters between the detection coils 16a at a second tilt angle β and restores the angle to be nearly perpendicular to the transfer direction X when the rod-shaped food 2 is discharged. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a metal detector for a bar-like food that detects a metal piece mixed in a bar-like food such as noodles, and a bar-like food shipping apparatus including the same.

  Traditionally, metal detectors have been used in a wide range of industries such as food, medicine and chemical products to prevent metal parts such as screws and nuts from being mixed with metal parts such as sewing needles. It has become established.

  For example, in Patent Document 1, a transport unit that transports a subject, and a detection coil that is disposed above and below the transport unit, and mixed in the subject transported between the upper and lower detection coils. There is disclosed a metal detection apparatus including detection means for detecting a metal piece by disturbance of a magnetic field, and a gantry for placing the transport means and detection means.

In such a metal detection device, when the subject passes between the excitation coil and the detection coil, the excitation magnetic field generated by the excitation coil changes the interlinkage magnetic flux due to the mixed metal in the product. An electromotive force is generated and a current flows, and a metal mixed in the product is detected by a difference between the currents.
JP 59-160787 A

  However, in the conventional metal detection device, when the metal piece is not actually mixed when passing through the detection coil, the metal detection device outputs a detection signal as if the metal piece is mixed in the subject. It may come out. This is called a material effect, and is one of the causes for significantly reducing the function of the metal detection device.

  This material effect often appears in foods with high salt content and high moisture content, or in hot bread immediately after baking. This occurs because salt and moisture reduce the electrical resistance of the product itself and make it easier to carry current. An eddy current is generated in this type of product placed in the magnetic field of the detection coil. However, the smaller the electric resistance, the larger the current, and the influence of the material effect increases.

  In particular, when performing metal detection of rod-shaped foods such as raw noodles, cold wheat, spaghetti and other noodles, the metal detectors are arranged substantially perpendicular to the transport direction in order to efficiently stack the rod-shaped foods after inspection. However, in this case, since the material effect is abrupt, the performance inherent to the metal detector cannot be demonstrated, and the detection sensitivity of the metal piece can be increased. There wasn't. For example, the iron wire mixed in the noodles has a limit of φ1.0 to 1.5 mm, and the stainless wire has a limit of φ1.2 to 2.0 mm.

  This invention is made | formed in view of this point, The place made into the objective changes the carrying-in and carrying-out angle of a rod-shaped food by comprising so that the incident angle of the rod-shaped food with respect to the coil for a detection can be changed. Without the material effect, it is to improve the detection sensitivity of the metal piece.

In order to achieve the above object, in the first invention, a conveying means for conveying a stick-shaped food,
Detection means disposed inside and above the conveying means inside, and detecting means for detecting a metal piece mixed in the rod-shaped food conveyed between the upper and lower detection coils by disturbance of the magnetic field;
A metal detector for foods with a rod-like food provided with a gantry for placing the conveying means and the detecting means,
The detection means is disposed on the gantry and is inclined so that the detection coil has a first inclination angle in a plan view with respect to the conveyance direction of the conveyance means,
The conveying means changes the angle so that the rod-shaped food charged substantially perpendicularly to the conveying direction has a second inclination angle with respect to the detection coil and enters between the detection coils. And an angle adjusting means for returning the angle so as to be substantially perpendicular to the conveying direction when unloaded,
The detection means is supported by the gantry so that the first inclination angle can be changed.

  According to the above configuration, the detection means is disposed on the gantry so as to be inclined at an appropriate angle so that the detection coil has a first inclination angle in plan view with respect to the transport direction. When the rod-shaped food charged substantially perpendicular to the conveying direction is directed to the detection means, the angle is adjusted by the angle adjustment means so as to enter between the detection coils with a second inclination angle. For this reason, since the stick-shaped foods gradually enter the detection areas of the detection coils arranged above and below, an abrupt material effect is avoided and the detection sensitivity of the metal piece is improved. After passing through the detection coil, the angle of the rod-shaped food is returned by the angle adjusting means and becomes substantially perpendicular to the conveying direction when it is carried out, so that the clogging work after the inspection is easy. Moreover, since the detection means is supported by the gantry so that the first inclination angle can be changed, the detection means can be adjusted to have the highest sensitivity by changing the first inclination angle in accordance with the thickness of the rod-like food. .

In the second invention, the conveying means comprises a first belt conveyor and a second belt conveyor,
The angle adjusting means is composed of a speed adjusting means for adjusting the conveying speed of the first belt conveyor and the second belt conveyor, and an angle changing member forcibly inclining the rod-like food before entering the detecting means. Has been.

  According to said structure, when making the conveyance speed of a 1st belt conveyor faster than the conveyance speed of a 2nd belt conveyor by a speed adjustment means, for example, it is forcibly 2nd with the angle change member arrange | positioned at the 1st belt conveyor side. The rod-shaped food that has been pushed so as to be delayed compared to the belt conveyor side and whose angle has been changed passes through the detection means, and then the first belt conveyor side advances faster than the second belt conveyor side and is substantially perpendicular to the conveying direction. Try to become. Therefore, by adjusting the angle so that the angle is appropriately returned by the speed adjusting means, the stick-shaped food can be carried out so as to be substantially perpendicular to the conveying direction.

In 3rd invention, the said 1st belt conveyor and a 2nd belt conveyor are equipped with the pulley of the same diameter rotated at the same speed,
The speed adjusting means is configured by making the radius of the first round belt of the first belt conveyor larger than the radius of the second round belt of the second belt conveyor.

  According to the above configuration, when a round belt having a different radius is hung on a pulley having the same rotation speed and diameter, the round belt having a larger radius has a higher conveyance speed. In this way, the speed adjusting means is easily realized.

  In a fourth aspect of the invention, the angle changing member is composed of a rod-like member provided upright in the vicinity of the first belt conveyor.

  According to the above configuration, the bar-shaped food that has advanced on the first belt conveyor is pushed so that the end on the first belt conveyor side abuts on the bar-shaped member and is forcibly delayed compared to the second belt conveyor side. It is transported after the angle is changed. After passing through the detecting means, the bar-shaped food is adjusted so as to return the angle by the speed adjusting means and is carried out so as to be substantially perpendicular to the conveying direction.

In a fifth invention, there is provided a rod-shaped food shipping apparatus comprising the metal detector for rod-shaped food according to any one of the first to fourth inventions,
A bar-shaped food weighing machine for measuring the mass of the bar-shaped food,
A rod-shaped food bundling machine that binds a certain amount of distributed rod-shaped food that has been weighed by the rod-shaped food weighing machine, and carries the bound rod-shaped food to the metal detector for rod-shaped food substantially perpendicularly to the conveying direction;
And a loading table provided with a rail for arranging the bar-shaped foods inspected by the metal detector for bar-shaped foods substantially perpendicularly to the conveying direction.

  According to the above configuration, the rod-shaped food that has been weighed to a predetermined mass by the rod-shaped food weighing machine is bound by the rod-shaped food bundling machine, and is conveyed to the rod-shaped food metal detection device substantially perpendicular to the conveying direction. After the presence or absence of metal pieces is inspected by the metal detection device for use, the metal pieces are arranged on the rails of the stacking table substantially perpendicular to the transport direction and packed for shipment. For this reason, it is possible to perform a series of shipping operations efficiently.

  As described above, according to the present invention, the detection means is supported on the gantry so as to be tiltable in a plan view with respect to the transport direction, and the rod-shaped food that is introduced substantially perpendicularly to the transport direction is supported with respect to the detection coil. By inclining and intruding, and returning the angle so that it is substantially perpendicular to the transport direction at the time of unloading, it is difficult to receive material effects without changing the angle of loading and unloading of stick food The detection sensitivity of the metal piece can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a plan view showing an entire stick-shaped food shipping apparatus including a stick-shaped food metal detecting device according to an embodiment of the present invention. FIG. 2 is a perspective view showing a metal detector for foods in a bar shape.

  As shown in FIG. 1, a bar-shaped food shipping device 1 includes a bar-shaped food weighing machine 3, a bar-shaped food binding machine 4, a bar-shaped food metal detecting device 5 according to an embodiment of the present invention, and a product. An upper table 6, a work table 7, a wooden box stuffing table 32, a wooden box meter 34, and a shipping roller conveyor 8 are provided. The shipping roller conveyor 8 is a free roller conveyor, but may be a belt conveyor.

  The bar-shaped food weighing machine 3 measures the bar-shaped food 2 such as raw noodles cut to a certain length and distributes it by a predetermined mass.

  The rod-like food binding machine 4 binds the rod-like food 2 which is measured by the rod-like food weighing machine 3 and is distributed in a certain amount, and the bundled rod-like food 2 is fed to the metal detector 5 for the rod-like food with respect to the conveying direction X. It is carried out substantially vertically. In the present embodiment, the up conveyor 9 is arranged after the stick-shaped food binding machine 4 so that the stick-shaped food 2 carried out from the stick-shaped food binding machine 4 is raised while being kept substantially perpendicular to the transport direction X. It is conveyed to the metal detector 5 for bar food.

  As shown in FIG. 7, the loading table 6 includes a pair of rails 6 a for arranging the rod-shaped foods 2 inspected by the rod-shaped food metal detection device 5 substantially perpendicularly to the transport direction X. is there. The top plate 6b is inclined upward in the transport direction X. This makes it difficult for the rod-shaped food 2 that has been transported to fall off.

  As shown in FIG. 1, a scale 10 is placed on the work table 7, and an operator 11 picks up the bar-shaped food 2 accumulated on the rail 6 a, and performs an uninspected inspection with the scale 10 on the work table 7. However, a certain amount is packed in the wooden box 12.

  A free roller 33 is placed on the wooden box stuffing table 32. The wooden box 12 is placed on the free roller 33. The wooden box 12 packed with the stick-like food 2 is weighed after being pushed on the free roller 33 and placed on the wooden box measuring instrument 34, and the measured wooden box 12 is transported to the shipping roller conveyor 8. It comes to be carried out by.

  FIG. 3 is a plan view showing the conveying means 15 and the gantry 17. FIG. 4 is a side view showing the conveying means 15 and the gantry 17. FIG. 5 is a plan view illustrating how the noodles flow. The metal food detector 5 for bar food has a conveying means 15, a detecting means 16, and a gantry 17. The gantry 17 is for mounting the conveying means 15 and the detecting means 16 and the like.

  As shown in FIG. 2, the detection means 16 detects a metal piece mixed in the rod-shaped food 2 by sandwiching the rod-shaped food 2 conveyed by the conveyance means 15 between detection coils 16a arranged vertically. It is. For example, in this embodiment, when a metal piece is detected, an alarm buzzer 27 (shown in FIG. 6) sounds. Although not shown in detail, normally, in the detection coil 16a, an excitation coil is arranged on the upper side of the conveying means 15 along the longitudinal direction of the detection means 16, and a detection coil is arranged on the lower side. As shown in FIG. 5, the detection means 16 is disposed on the gantry 17 so that the detection coil 16 a is inclined so as to have a first inclination angle α in a plan view with respect to the conveyance direction X of the conveyance means 15. The first inclination angle α can be changed. For example, 40 ° <α <90 °.

  Specifically, as shown in FIGS. 3 and 4, a turntable 17a is placed on the mount 17, and the turntable 17a is supported so as to be rotatable about a central axis 17c with respect to the mount body 17b. And can be fixed at a predetermined position. For example, if the position when the rod-shaped food 2 is raw noodle, the position when it is cold or wheat, etc. are clearly indicated, the user can adjust the position with a handle (not shown) provided on the central shaft 17c.

  The conveying means 15 is for conveying the rod-shaped food 2 and includes a first belt conveyor 18 and a second belt conveyor 19. That is, the 1st belt conveyor 18 and the 2nd belt conveyor 19 are each provided with the 1st and 2nd pulleys 20 and 21 of the same diameter which rotate at the same speed. A first round belt 22 is hung between the first pulleys 20, and a second round belt 23 is hung between the second pulleys 21. An electric motor 24 is disposed on the gantry 17. The first and second pulleys 20 and 21 on the carry-out side are connected to a drive shaft 25, and the drive shaft 25 is rotated by an electric motor 24. The tension of the first and second round belts 22 and 23 is adjusted by the adjustment pulley 26 on the carry-in side. The alarm buzzer 27 is provided below the carrying means 15 on the carry-out side.

  The radius r1 of the first round belt 22 of the first belt conveyor 18 is larger than the radius r2 of the second round belt 23 of the second belt conveyor 19 (r1> r2). For example, r1 = 3 mm and r2 = 2.5 mm. When round belts having different radii are hung on the first and second pulleys 20 and 21 having the same rotation speed and diameter, the round belt having a larger radius has a higher conveyance speed. Therefore, the conveyance speed s1 of the first belt conveyor 18 is increased. Is faster than the conveying speed s2 of the second belt conveyor 19 (s1> s2). The range of the conveyance speed is approximately 5 m / min <s1, s2 <10 m / min.

  As shown in FIG. 5, in the conveying means 15, the rod-shaped food 2 put in substantially perpendicular to the conveying direction X has a second inclination angle β with respect to the detecting coil 16a and the detecting coil 16a. An angle adjusting means 14 is provided to change the angle so as to enter in between, and to return the angle so as to be substantially perpendicular to the transport direction X during unloading. For example, 30 ° <β <90 °. In FIG. 5, the second inclination angle β is shown in front of the detection coil 16a for the sake of clarity. Actually, the rod-shaped food 2 is moved in the transport direction when approaching the detection coil 16a. Since it is going to return gradually to X with respect to X, it becomes smaller than that shown in the figure. The range of the second inclination angle β indicates the range of the angle at the moment of entering between the detection coils 16a.

  By providing a difference in the sizes of the radii r1 and r2, speed adjusting means 18 for adjusting the transport speeds s1 and s2 between the first belt conveyor 18 and the second belt conveyor 19 is configured.

  FIG. 6 is an enlarged perspective view showing the angle changing member 30 and its periphery. As shown in FIG. 6, in the vicinity of the first belt conveyor 18, an angle changing member 30 made of a rod-like member is erected. The angle changing member 30 is attached to the gantry 17 via a mounting bracket 31. The mounting position of the mounting bracket 31 can be adjusted. By adjusting the position of the angle changing member 30 according to the length of the rod-shaped food 2 or the like, before the rod-shaped food 2 enters the detection means 16, The first belt conveyor 18 side is forced to enter the detection means 16 later than the second belt conveyor 19 side.

  The speed adjusting means 18 and 19 and the angle changing member 30 constitute an angle adjusting means 14.

-Action-
Next, the operation of the rod-shaped food metal detection device 5 and the rod-shaped food 2 shipping device 1 according to the present embodiment will be described.

  First, the bar-shaped food 2 weighed to a predetermined mass by the bar-shaped food weighing machine 3 is bound by the bar-shaped food binding machine 4.

  Subsequently, it is carried out substantially perpendicularly with respect to the conveyance direction X by the metal detector 5 for bar food.

  Next, the presence or absence of a metal piece is inspected by the metal detector 5 for bar food.

  Here, the detection means 16 is disposed on the gantry 17 so that the detection coil 16a is inclined at an appropriate angle such that the detection coil 16a has a first inclination angle α in plan view with respect to the transport direction X. Since the detection means 16 is supported by the mount 17 so that the first inclination angle α can be changed, the sensitivity is best achieved by changing the first inclination angle α in accordance with the thickness of the rod-like food 2 or the like. Adjusted.

  When the rod-shaped food 2 put in substantially perpendicular to the conveyance direction X is conveyed by the first and second belt conveyors 18 and 19 toward the detection means 16, the angle adjusting means 14 has a second inclination angle β. Then, the angle can be changed so as to enter between the detection coils 16a.

  That is, the first belt conveyor 18 side end of the bar-shaped food 2 comes into contact with the angle changing member 30 and is forced to be delayed compared to the second belt conveyor 19 side to change the angle, and then conveyed. The For this reason, since the stick-shaped food 2 intrudes little by little into the detection area of the detection coil 16a arranged above and below, an abrupt material effect is avoided and the detection sensitivity of the metal piece is improved.

  After passing through the detection means 16, the stick-shaped food 2 is adjusted so as to return the angle by the speed adjustment means 18 and 19 and is carried out so as to be substantially perpendicular to the transport direction X. For this reason, the packing operation after the inspection is easy. Specifically, the bar-like food 2 whose angle has been changed by the angle changing member 30 disposed on the first belt conveyor 18 side so as to be forcibly delayed compared to the second belt conveyor 19 side is detected by the detection means 16. After passing, the first belt conveyor 18 side advances faster than the second belt conveyor 19 side and tends to be substantially perpendicular to the transport direction X. Therefore, the rod-like food 2 can be carried out so as to be substantially perpendicular to the carrying direction X by adjusting the speed adjusting means 18 and 19 to return the angle. Moreover, since any of the speed adjusting means 18 and 19 or the angle changing member 30 may be adjusted, the adjustment work is easy.

  When it is confirmed in the metal detector 5 for bar food that the metal piece is mixed in the bar food 2, the alarm buzzer 27 sounds. Then, the operator 11 picks up the stick-shaped food 2.

  The bar-like foods 2 having no abnormality are arranged substantially perpendicular to the transport direction X while sliding on the rails 6a of the loading table 6. The operator 11 picks up the bar-shaped food 2 accumulated on the rail 6 a and performs a spot check with a scale 10 on the work table 7. For example, when the rod-shaped food 2 is raw noodles, 6 bundles of about 50 g per bundle are collected and placed on the scale 10 and appropriately confirmed to be about 300 g.

  Next, the bar-shaped food 2 is packed in the wooden box 12 on the free roller 33. For example, about 20 kg is packed.

  Next, the wooden box 12 packed with the stick-shaped food 2 is slid on the free roller 33 and placed on the wooden box measuring instrument 34 to confirm that the weight is about 20 kg.

  Next, the wooden box 12 confirmed to be about 20 kg is carried out by the shipping roller conveyor 8. In this way, a series of shipping operations is efficiently performed by the shipping device 1 for the stick-shaped food 2.

-Effect of the embodiment-
Therefore, according to the rod-shaped food metal detecting device 5 according to the present embodiment, the detection means 16 is supported on the gantry 17 so as to be tiltable in a plan view with respect to the transport direction X, and is inserted substantially perpendicular to the transport direction X. The rod-like food 2 is made to incline with respect to the detection coil 16a, and the angle of the rod-like food 2 is returned so as to be substantially perpendicular to the conveyance direction X when being carried out. Without changing the material effect, it is difficult to receive the material effect, and the detection sensitivity of the metal piece can be improved. Specifically, iron wire mixed in the raw noodles can be detected with about φ0.5 mm, and stainless steel wire with about φ0.8 mm can be detected.

(Other embodiments)
The present invention may be configured as follows with respect to the above embodiment.

  That is, in the above-described embodiment, examples of raw noodles are shown as stick-shaped foods, but the present invention can be applied as long as it detects metal pieces of long thin foods as well as cold wheat, udon, spaghetti and other noodles. .

Further, the present invention can be easily realized by remodeling the pedestal and the conveying means of the existing metal detector for bar food. In this case, for example, a new rotating table 17a may be provided on the gantry, and the angle changing member 30 may be attached to an appropriate position, and the first round belt may be replaced with a thicker one. For this reason, it is possible to improve the detection sensitivity of metal pieces by making the existing metal detector for bar foods less susceptible to material effects without changing the loading and unloading angles of bar foods easily and inexpensively. The above embodiments are merely preferred examples in nature, and are not intended to limit the scope of the present invention, its applications, and uses.

  As described above, the present invention is useful for a rod-shaped food metal detection device that detects an elongated metal piece such as an iron wire or a stainless steel wire mixed in a rod-shaped food such as raw noodles, cold or wheat, and a rod-shaped food shipping device including the same. It is.

It is a top view which shows the whole stick food shipping apparatus provided with the metal detector for stick food concerning embodiment of this invention. It is a perspective view which shows the metal detection apparatus for stick-shaped foodstuffs. It is a top view which shows a conveyance means and a mount frame. It is the side view which looked at a conveyance means and the mount frame from the IV direction. It is a top view explaining a mode that element noodles flow. It is a perspective view which expands and shows an angle change member and its periphery. It is a perspective view which shows the stand for loading.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shipping apparatus 2 Bar-shaped food 3 Bar-shaped food weighing machine 4 Bar-shaped food bundling machine 5 Bar-shaped food metal detector 6 Loading base 6a Rail 14 Angle adjustment means 15 Conveying means 16 Detection means 16a Detection coil 17 Base 18 First belt Conveyor (speed adjustment means)
19 Second belt conveyor (speed adjusting means)
20 First pulley 21 Second pulley 22 First round belt 23 Second round belt 30 Angle changing member

Claims (5)

A conveying means for conveying a stick-shaped food;
Detection means disposed inside and above the conveying means inside, and detecting means for detecting a metal piece mixed in the rod-shaped food conveyed between the upper and lower detection coils by disturbance of the magnetic field;
A metal detector for foods with a rod-like food provided with a gantry for placing the conveying means and the detecting means,
The detection means is disposed on the gantry and is inclined so that the detection coil has a first inclination angle in a plan view with respect to the conveyance direction of the conveyance means,
The conveying means changes the angle so that the rod-shaped food charged substantially perpendicularly to the conveying direction has a second inclination angle with respect to the detection coil and enters between the detection coils. And an angle adjusting means for returning the angle so as to be substantially perpendicular to the conveying direction when unloaded,
The said detection means is supported by the said mount so that the said 1st inclination angle can be changed, The metal detection apparatus for stick-shaped foodstuffs characterized by the above-mentioned. In the metal detector for stick-shaped food according to claim 1,
The conveying means includes a first belt conveyor and a second belt conveyor,
The angle adjusting means is composed of a speed adjusting means for adjusting the conveying speed of the first belt conveyor and the second belt conveyor, and an angle changing member forcibly inclining the rod-like food before entering the detecting means. A metal detector for bar foods, characterized in that In the metal detector for bar food according to claim 2,
The first belt conveyor and the second belt conveyor include pulleys of the same diameter that rotate at the same speed,
The speed adjusting means is configured to make the radius of the first round belt of the first belt conveyor larger than the radius of the second round belt of the second belt conveyor. . In the metal detector for bar foods according to claim 3,
The said angle change member was comprised by the rod-shaped member erected in the vicinity of the said 1st belt conveyor, The metal detection apparatus for rod-shaped foodstuffs characterized by the above-mentioned. A stick food shipping device comprising the metal detector for stick food according to any one of claims 1 to 4,
A bar-shaped food weighing machine for measuring the mass of the bar-shaped food,
A rod-shaped food bundling machine that binds a certain amount of distributed rod-shaped food that has been weighed by the rod-shaped food weighing machine, and carries the bound rod-shaped food to the metal detector for rod-shaped food substantially perpendicularly to the conveying direction;
An apparatus for shipping bar-shaped foods, comprising: a loading table provided with a rail for arranging bar-shaped foods inspected by the metal detector for bar-shaped foods substantially perpendicularly to the conveying direction.

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