JP2015078874A - Detector of deoxidant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detector of a deoxidant capable of accurately detecting the deoxidant with a simple configuration.SOLUTION: A detection unit 7 includes: a pair of arms 41 and 42 oscillatable about a support shaft 43; a magnet roller 70 disposed rotatably about a rotation axis 25 disposed at the tips of the arms 41 and 42; a rotation detection sensor 26 for detecting the rotation of the magnet roller 70; and a pair of counter weights 46. The magnet roller 70 includes a metallic roller plate 71, a sensor plate 73, and a permanent magnet 72.

Description

  The present invention relates to an oxygen scavenger detection device that detects whether or not an oxygen scavenger containing a ferromagnetic material is stored in a packaging bag that stores an object to be packaged.

  For example, an oxygen scavenger is accommodated in a packaging bag containing food as an object to be packaged in order to prevent food oxidation or generation of mold. The iron-based oxygen absorber most frequently used as the oxygen absorber is composed mainly of iron powder, and is configured to remove oxygen in the packaging bag by oxidation of the iron powder. In such an automated food storage line, it is necessary to inspect whether or not the oxygen scavenger is securely stored in the packaging bag.

  As a detection mechanism for detecting the presence or absence of an oxygen scavenger in such a packaging bag, one using a metal detector or one using X-rays has been proposed. There is a problem that the apparatus cost becomes high.

  For this reason, the permanent magnet generated by the attraction action between the permanent magnet movably disposed in the vicinity of the transport path of the packaging bag by the conveyor, the support member that elastically supports the permanent magnet, and the oxygen scavenger. There has been proposed an oxygen scavenger detection device comprising a displacement detection means for detecting displacement (see Patent Document 1).

JP 2000-35484 A

  In the oxygen scavenger detection device described in Patent Document 1 described above, in order to appropriately displace the permanent magnet, it is necessary to dispose the permanent magnet at a position close to the conveyor that conveys the packaging bag. However, when the permanent magnet is brought close to the conveyor, the permanent magnet is attracted to the oxygen scavenger, and the conveyor is sandwiched between the packaging bag and the permanent magnet. It becomes impossible. For this reason, it becomes extremely difficult to dispose the permanent magnet at an appropriate position.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an oxygen scavenger detection device capable of detecting an oxygen scavenger with high accuracy while having a simple configuration.

  The invention according to claim 1 is an oxygen scavenger detection device that detects whether or not a oxygen scavenger containing a ferromagnetic material is stored in a packaging bag that stores an object to be packaged. A transport belt for placing and transporting the packaging bag, an arm disposed below the transport belt, swingable about a horizontal support shaft, and rotatably disposed at the tip of the arm And a magnet roller provided with a magnetic force, and a rotation detection sensor for detecting the rotation of the magnet roller.

  According to a second aspect of the present invention, in the first aspect of the present invention, the size of the oxygen scavenger in the transport direction is detected based on the amount of rotation of the magnet roller detected by the rotation detection sensor.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, a plurality of the arm, the magnet roller, and the rotation detection sensor are arranged in a direction that intersects a conveyance direction of the oxygen scavenger. Established.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the belt has a belt guide plate disposed at a position facing the lower surface of the conveying belt. While sliding on the belt guide plate, the magnet roller enters a hole formed in the belt guide plate as the arm swings.

  According to the first aspect of the present invention, the magnet roller rotatably disposed at the tip of the arm that can swing around the support shaft that faces in the horizontal direction, and the rotation detection sensor that detects the rotation of the magnet roller. As a result, the oxygen scavenger can be detected with high accuracy while having a simple configuration.

  According to the second aspect of the present invention, it is possible to easily detect the size of the oxygen scavenger in the transport direction.

  According to the third aspect of the present invention, it is possible to easily detect the position or size in the direction intersecting with the transport direction of the oxygen scavenger.

  According to the fourth aspect of the present invention, it is possible to detect the oxygen scavenger with high accuracy while stably transporting the packaging bag by the transport belt.

1 is a perspective view of an oxygen scavenger detection device according to the present invention. 1 is a perspective view of an oxygen scavenger detection device according to the present invention. 3 is a perspective view of a detection unit for detecting an oxygen scavenger 11. FIG. 4 is a perspective view of a detection unit 7. FIG. It is a block diagram which shows the main control systems in the detection apparatus of the oxygen scavenger concerning this invention. It is a schematic diagram which shows the detection operation of the oxygen scavenger 11 by the oxygen scavenger detector according to the present invention. It is a schematic diagram which shows the detection operation of the oxygen scavenger 11 by the oxygen scavenger detector according to the present invention. It is a schematic diagram which shows the detection operation of the oxygen scavenger 11 by the oxygen scavenger detector according to the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2 are perspective views of an oxygen scavenger detection device according to the present invention. FIG. 1 shows a state in which the conveyor belt 21 is removed.

  This oxygen scavenger detection device is for detecting the oxygen scavenger 11 whose main component is iron powder. The oxygen scavenger 11 is stored in a packaging bag 10 that stores an object to be packaged such as food. The oxygen scavenger detection device according to the present invention has a configuration for detecting the oxygen scavenger 11 by utilizing the property that the oxygen scavenger 11 is attracted to the magnet. Further, when the oxygen scavenger 11 is deteriorated, the property that the oxygen scavenger 11 is attracted to the magnet is reduced. For this reason, this oxygen scavenger detection device can also detect the deterioration of the oxygen scavenger 11.

  The oxygen scavenger detection device includes a transport belt 21 for transporting the packaging bag 10. The conveyor belt 21 has an endless shape and is wound between a pair of rollers 27 and 28 disposed near both ends of the main body 20 in the oxygen scavenger detection device. The oxygen scavenger detection device includes a motor 31 for rotationally driving the pair of rollers 27, 28, an electrical box 33, and a detection area display top plate 34 that indicates the detection area of the oxygen scavenger 11. . Further, the oxygen scavenger detection device includes a belt guide plate 22 disposed opposite to the lower surface of the transport belt 21 as shown in FIG. The conveyor belt 21 slides on the belt guide plate 22 from the electrical box 33 toward the detection area display top plate 34. One of the belt guide plates 22 is formed with a hole 23 (see FIGS. 6 to 8) having a shape corresponding to a magnet roller 70 described later.

  A pair of determination indicator lamps 35 and 36 for displaying the presence or absence of the oxygen scavenger 11 are disposed on the upper surface of the detection area display top plate 34 described above. Among these determination indicator lamps 35 and 36, the determination indicator lamp 35 does not contain the oxygen scavenger 11 in the packaging bag 10 or the oxygen scavenger 11 in the packaging bag 10 has deteriorated. In order to show that, red light is irradiated. Further, the determination indicator lamp 36 of the determination indicator lamps 35 and 36 emits blue light to indicate that the proper oxygen scavenger 11 is stored in the packaging bag 10. A passage detection sensor 37 for detecting that the packaging bag 10 has passed the detection area is disposed below the detection area display top plate 34. The passage detection sensor 37 is constituted by an optical sensor or a proximity sensor for detecting that the packaging bag 10 has entered the detection area.

  FIG. 3 is a perspective view of a detection unit for detecting the oxygen scavenger 11.

  The detection unit for detecting the oxygen scavenger 11 is disposed below the transport belt 21, and three detection units 7 are arranged in a direction orthogonal to the transport direction of the packaging bag 10 by the transport belt 21. The configuration is as follows. The three detection units 7 are alternately arranged on a support plate 52 that connects the pair of side plates 51. Each of these detection units 7 has the same structure.

  FIG. 4 is a perspective view of the detection unit 7 constituting the detection unit.

  The detection unit 7 includes a pair of arms 41 and 42 that can swing around a support shaft 43 that is fixed to the main body 20 and faces the horizontal direction, and a rotary shaft 25 that is disposed at the tip of the arms 41 and 42. , A rotation detection sensor 26 for detecting the rotation of the magnet roller 70, and a pair of counterweights 46.

  The magnet roller 70 includes eleven metal roller plates 71, one sensor plate 73, and a permanent magnet 72 disposed between the roller plate 71 and the sensor plate 73. The roller plate 71, the sensor plate 73, and the permanent magnet 72 are supported by a rotating shaft 25 that is rotatably arranged with respect to the pair of arms 41 and 42, and rotate in synchronization with the rotating shaft 25. .

  A large number of holes are formed in the sensor plate 73 along the circumferential direction. The rotation detection sensor 26 detects the rotation of the sensor plate 73, that is, the rotation of the magnet roller 70 by detecting the hole formed in the sensor plate 73. The rotation detection sensor 26 is attached to the plate 44 supported by the support shaft 43. The pair of counterweights 46 described above is supported by a support plate 45 disposed between the pair of arms 41 and 42.

  FIG. 5 is a block diagram showing a main control system in the oxygen scavenger detection apparatus according to the present invention.

  This oxygen scavenger detection device is composed of a CPU that executes logical operations, a ROM that stores an operation program necessary for controlling the device, a RAM that temporarily stores data during control, and the like. The control part 100 to control is provided. As a functional configuration, the control unit 100 includes a size detection unit 101 that detects the size of the oxygen scavenger 11 in the conveyance direction based on the rotation amount of the magnet roller 70 detected by the rotation detection sensor 26, and three detection units 7. And a region detection unit 102 for detecting which detection unit 7 detects the oxygen scavenger 11.

  The control unit 100 is connected to the rotation detection sensor 26 in the three detection units 7. Moreover, this control part 100 is connected with the passage detection sensor 37 for detecting that the packaging bag 10 passed the detection area. Further, the control unit 100 is also connected to a motor 31 for rotationally driving the pair of rollers 27 and 28 and a pair of determination indicator lamps 35 and 36 for displaying the presence or absence of the oxygen scavenger 11.

  6 to 8 are schematic views showing the detection operation of the oxygen scavenger 11 by the oxygen scavenger detection device according to the present invention.

  As shown in these drawings, a sensitivity adjustment cam 26 is disposed below the pair of arms 41 and 42. The sensitivity adjustment cam 26 has an eccentric structure, and adjusts the rotational angle position about the support shaft 43 of the pair of arms 41 and 42, thereby detecting the oxygen scavenger 11 to be described later and the pair of arms 41. , 42 can be easily swung. Further, the above-described counterweight 46 is adjusted in distance from the support shaft 43 so that the pair of arms 41 and 42 can swing with a very small force.

  When inspecting whether or not the oxygen scavenger 11 is stored in the packaging bag 10, as shown in FIG. 1, the packaging bag 10 is connected to the electrical box 33 and the detection area display top plate 34 on the transport belt 21. Place it at a position between. At this time, the operator may manually place the packaging bag 10 on the conveyance belt 21, or may place the packaging bag 10 on the conveyance belt 21 by a conveyance device (not shown).

  The packaging bag 10 placed on the conveyor belt 21 moves in the direction approaching the magnet roller 70 while being placed on the conveyor belt 21. At this time, as shown in FIG. 6, the pair of arms 41 and 42 is disposed at an angular position where the magnet roller 70 is disposed below.

  In this state, when the packaging bag 10 containing the oxygen scavenger 11 is transported by the transport belt 21 and the oxygen scavenger 11 comes close to the magnet roller 70, the magnet roller 70 and the oxygen scavenger 11 are shown in FIG. The pair of arms 41 and 42 swings due to the magnetic force acting between them. As a result, the magnet roller 70 enters the hole 23 formed in the belt guide plate 22 and comes into contact with the lower surface of the transport belt 21. When the conveyor belt 21 continues to convey the packaging bag 10 in this state, the magnet roller 70 rotates while being in contact with the lower surface of the conveyor belt 21. The rotation of the magnet roller 70 is detected by the rotation detection sensor 26 that detects the rotation of the sensor plate 73, and the signal is transmitted to the control unit 100.

  At this time, since it is the rotatable magnet roller 70 that comes into contact with the conveyor belt 21, it does not hinder the conveyance of the packaging bag 10 by the conveyor belt 21. The magnet roller 70 continues to rotate while the oxygen scavenger 11 is disposed in proximity to the magnet roller 70, and information about the rotation of the magnet roller 70 is detected by the rotation detection sensor 26 and is sent to the control unit 100. Sent. At this time, information on which of the three detection units 7 the rotation detection sensor 26 of which detection unit 7 has detected the rotation of the magnet roller 70 is also transmitted to the control unit 100.

  When the oxygen scavenger 11 stored in the packaging bag 10 passes above the magnet roller 70, the action of the magnetic force between the magnet roller 70 and the oxygen scavenger 11 is eliminated, and as shown in FIG. 41 and 42 swing in a direction in which the magnet roller 70 is separated from the hole 23 formed in the belt guide plate 22, and the pair of arms 41 and 42 return to the same positions as in the initial state shown in FIG. Then stop.

  On the other hand, when the packaging bag 10 in which the oxygen scavenger 11 is not stored by the transport belt 21 or the packaging bag 10 in which the deteriorated oxygen scavenger 11 is stored is transported, the pair of arms 41 and 42 are It does not move from the position shown in FIGS. 6 and 8, and the magnet roller 70 does not rotate.

  When the rotation detection sensor 26 detects that the magnet roller 70 has been rotated when the passage detection sensor 37 for detecting that the packaging bag 10 has passed the detection area detects the passage of the packaging bag 10, the control is performed. The unit 100 determines that the proper oxygen scavenger 11 has been stored in the packaging bag 10 and turns on the blue determination indicator light 36. At this time, the size detection unit 101 in the control unit 100 detects the size of the oxygen scavenger 11 in the conveyance direction based on the rotation amount of the magnet roller 70 detected by the rotation detection sensor 26. Further, the region detection unit 102 detects which detection unit 7 of the three detection units 7 has detected the oxygen scavenger 11. Information on the size of the oxygen scavenger 11 in the conveyance direction and information on the position where the oxygen scavenger 11 is detected are displayed on a display unit (not shown) as necessary.

  On the other hand, when the rotation detection sensor 26 does not detect that the magnet roller 70 has rotated when the passage detection sensor 37 for detecting that the packaging bag 10 has passed through the detection area detects the passage of the packaging bag 10. , The control unit 100 determines that the proper oxygen scavenger 11 is not stored in the packaging bag 10 and turns on the red determination indicator lamp 35.

  As described above, in the oxygen scavenger detection device according to the present invention, it is possible to accurately detect the presence or absence of an appropriate oxygen scavenger 11 in the packaging bag 10 with an extremely simple configuration.

  In the above-described embodiment, the permanent magnet 72 is used as a part of the magnet roller 70, but an electromagnet may be used. Further, the roller plate 71 may be constituted by a permanent magnet, or the entire magnet roller may be constituted by a magnet.

  In the above-described embodiment, the three detection units 7 are arranged. However, the oxygen scavenger 11 may be detected using a single detection unit 7.

DESCRIPTION OF SYMBOLS 7 Detection unit 10 Packaging bag 11 Oxygen absorber 21 Conveyance belt 22 Belt guide plate 23 Hole part 25 Rotating shaft 26 Rotation detection sensor 27 Roller 28 Roller 31 Motor 35 Judgment indicator lamp 36 Judgment indicator lamp 37 Passing detection sensor 41 Arm 42 Arm 46 Counterweight 70 Magnet roller 71 Roller plate 72 Permanent magnet 73 Sensor plate 100 Control unit 101 Size detection unit 102 Region detection unit

Claims (4)

In the oxygen scavenger detection device for detecting whether or not the oxygen scavenger containing a ferromagnetic material is stored in a packaging bag that stores an article to be packaged,
A transport belt for placing and transporting the packaging bag on its upper surface;
An arm disposed below the conveyor belt and swingable about a support shaft facing in the horizontal direction;
A magnet roller disposed rotatably at the tip of the arm and provided with a magnetic force;
A rotation detection sensor for detecting rotation of the magnet roller;
A device for detecting an oxygen scavenger, comprising: The oxygen scavenger detection device according to claim 1,
An oxygen scavenger detection device that detects the size of the oxygen scavenger in the transport direction based on the rotation amount of the magnet roller detected by the rotation detection sensor. The oxygen scavenger detection device according to claim 1 or 2,
The arm, the magnet roller, and the rotation detection sensor are a plurality of oxygen scavenger detection devices arranged in a direction intersecting with the transport direction of the oxygen scavenger. The oxygen scavenger detection device according to any one of claims 1 to 3,
A belt guide plate disposed at a position facing the lower surface of the conveyor belt;
The conveyor belt slides on the belt guide plate,
The magnet roller is a device for detecting an oxygen scavenger that enters into a hole formed in the belt guide plate as the arm swings.

Images