WO2017065036A1 - Système d'inspection de pression interne - Google Patents

Système d'inspection de pression interne Download PDF

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Publication number
WO2017065036A1
WO2017065036A1 PCT/JP2016/079301 JP2016079301W WO2017065036A1 WO 2017065036 A1 WO2017065036 A1 WO 2017065036A1 JP 2016079301 W JP2016079301 W JP 2016079301W WO 2017065036 A1 WO2017065036 A1 WO 2017065036A1
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WO
WIPO (PCT)
Prior art keywords
displacement sensor
internal pressure
sealed container
inspection
inspection system
Prior art date
Application number
PCT/JP2016/079301
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English (en)
Japanese (ja)
Inventor
森　健司
健 村瀬
市川　浩之
中山　和彦
Original Assignee
東洋製罐株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 東洋製罐株式会社 filed Critical 東洋製罐株式会社
Priority to JP2017545153A priority Critical patent/JP6820461B2/ja
Publication of WO2017065036A1 publication Critical patent/WO2017065036A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/36—Investigating fluid-tightness of structures by using fluid or vacuum by detecting change in dimensions of the structure being tested

Definitions

  • the present invention relates to an internal pressure inspection system that detects whether or not the internal pressure of a sealed container having a panel portion is accommodated in a package.
  • a metal can body filled with food, beverages, and the like, and a lid body is tightened to form a sealed container has been widely used.
  • a heat sterilization process (retort sterilization or the like) is performed after sealing, and then an internal pressure inspection is performed to check whether the contents are leaked or deteriorated.
  • the method of inspecting the internal pressure of the sealed container includes the in-line inspection after the heat sterilization treatment, or the state and inspection of the inspection target such as a shipping inspection performed after a plurality of sealed containers are accommodated in a case or the like and temporarily stored.
  • a contact type or a non-contact type such as an electromagnetic type, an optical type, and an acoustic type is appropriately selected depending on the time.
  • Patent Document 1 discloses a distance (top depth) from an upper end of a can stored in a carton case and conveyed by a conveyor. ) And the distance (bottom depth) from the lower end to the bottom panel, and a device configured to determine whether the internal pressure is good or not by comparing the total value of the top depth and the bottom depth with a determination reference value.
  • Patent Document 2 a box body containing a can is pressed by a housing so that the thickness of the box body is made substantially uniform, and the distance between the housing and the can is made substantially constant by a proximity sensor.
  • An internal pressure inspection device for a sealed container is described in which an accurate internal pressure inspection can be performed by measuring a distance to a can.
  • Patent Document 3 includes a transport unit that transports a container, and a distance measurement unit that is provided on a base that is independently provided in a non-contact state with the transport unit in order to suppress vibration generated by the drive source. An internal pressure measuring device is described.
  • Patent Document 1 is intended to improve the inspection accuracy by using the total value of the top depth and the bottom depth as a determination reference value, it requires many sensors and the apparatus is expensive. It becomes complicated. In addition, since there is a gap with the carton case or the like above the container, the measurement of the top depth is low in accuracy, and there is a limit to improving the inspection accuracy.
  • Patent Document 2 is intended to improve the inspection accuracy by reducing the variation in measurement by making the distance between the proximity sensor and the can constant.
  • the distance between the proximity sensor and the can bottom is long, so the resolution for detecting the can bottom shape is low, and due to other variables such as vibration Variations in measurement occurred and there was a limit to improving inspection accuracy.
  • patent document 3 is trying to improve inspection precision by suppressing the vibration which the drive source generate
  • the present invention solves the above-described problems, and with a simple configuration, can detect the shape of the outer surface of the sealed container in a state accommodated in the case with high resolution, and accurately determines the quality of the internal pressure of the sealed container.
  • An object of the present invention is to provide an internal pressure inspection system that can be determined.
  • the internal pressure inspection system is an internal pressure inspection system for detecting the quality of the internal pressure of a sealed container having a panel portion in a state of being accommodated in a plurality of packaging bodies, an inspection transport unit that transports the packaging body, At least one displacement sensor provided in the inspection and transport unit, the displacement sensor having a measurement surface facing the lower surface of the package and package to be transported, and the test and transport unit on the package and package
  • the packaging unit is configured to be transportable so that a panel portion of the sealed container accommodated faces the measurement surface, and a shield member is provided around the displacement sensor to solve the problem. is there.
  • the shielding member is provided in the vicinity of the displacement sensor, the panel portion is limited even if the distance between the measurement surface of the displacement sensor and the panel portion of the sealed container is increased. It is possible to measure only the range. As a result, it is possible to accurately detect the distance from the panel portion of the sealed container that is continuously conveyed, and to detect the shape of the panel portion of the sealed container that is contained in the packaging body with high resolution. It is possible to accurately determine whether the quality is good or bad.
  • the panel of the sealed container is provided. It becomes possible to detect the distance to the part with higher accuracy.
  • the shielding member is a cylindrical body made of the same metal as the material of the sealed container serving as the object to be measured, when a metal different from the material of the sealed container is used. The influence on the displacement sensor concerned can be reduced.
  • the distance between the displacement sensor and the shielding member can be easily adjusted and the both can be accurately positioned by using the spacer. Further, by using a spacer made of a non-magnetic material, the influence on the displacement sensor and the shielding member can be minimized.
  • the measurement surface of the displacement sensor and the panel portion of the sealed container are arranged so as to be located at a distance of 2.0 to 12.0 mm. It becomes possible to detect the distance from the panel portion with higher accuracy.
  • the inspection transport unit is provided with a pressing mechanism that presses the packing and packaging body toward the displacement sensor side, so that measurement variations due to other variable elements such as vibrations can be reduced. Since it can suppress, the shape of the panel part of the sealed container in the state accommodated in the packaging package body can be detected with high resolution, conveying a packaging package body.
  • the sealed container accommodated in the packaging package by pressing the sealed container accommodated in the packaging package toward the displacement sensor, the sealed container is pushed into the lower surface of the packaging package, and the distance between the measurement surface of the displacement sensor and the panel portion of the sealed container is further shortened. As a result, the shape of the panel portion of the sealed container can be detected with higher resolution.
  • the displacement sensor is an eddy current displacement sensor having a measurement surface of ⁇ 5 to 15 mm
  • the displacement sensor has high directivity, and the shape of the panel portion of the sealed container is further improved. It can be detected with high resolution.
  • the measurement surface of the displacement sensor and the panel portion of the sealed container are arranged at a distance of 2.0 to 12.0 mm, the influence of the decrease in detection output due to the small area of the measurement surface Is reduced, and the detection accuracy is not lowered.
  • a plurality of displacement sensors are provided in the width direction of the inspection and transport unit, so that the packaged packaging body in which the sealed containers are accommodated in a plurality of matrix arrangements is arranged in one direction.
  • the shape of the panel part of all the sealed containers can be detected simply by transporting to the container.
  • the displacement sensor is provided in such a manner that the position of the inspection conveyance unit can be changed in the width direction, so that the number and arrangement of the sealed containers in the width direction are different. However, it is possible to match the position of the sealed container.
  • FIG. 1 is a side view of an internal pressure inspection system according to an embodiment of the present invention.
  • Explanatory drawing which shows the positional relationship of a displacement sensor and a sealed container.
  • Explanatory drawing which shows the shielding member with which a displacement sensor is mounted
  • the comparison figure of the bottom face shape of the sealed container measured by the difference in the shape and position of a displacement sensor.
  • FIG. 8 is a relationship diagram between the internal pressure and the measured value (digit) in FIG. 7.
  • Shielding member 171 Spacer D1 ... Measurement interval (distance between the measurement surface and the panel portion of the sealed container) D2 ... Distance from the grounding part of the leg part to the panel part D3 ... Thickness of the carton case bottom plate D4 ... Diameter of the measurement surface
  • the internal pressure inspection system 100 determines whether the internal pressure of a can 150 that is a sealed container having a panel portion is good or bad in a carton case 160 that is a packaging package.
  • An inspection and conveyance unit 110 that detects a plurality of containers 150 and determines the internal pressure of the can 150 while conveying the carton case 160; an introduction unit 130 that transfers the carton case 160 to the inspection and conveyance unit 110; and an inspection and conveyance unit A carton case 160 discharged from 110, and a discharge unit 140 for discharging the carton case 160 including the can 150 determined to be defective; an operation panel 101 for operating and controlling the entire internal pressure inspection system 100; It has.
  • the can 150 is a sealed container, and has a body part and a bottom part 151.
  • the bottom part 151 has a flat panel part 152 at the center thereof, an annular groove recessed inward of the container around the panel part 152, and the annular groove.
  • a leg portion 153 comprising an inwardly inclined wall connected to each other, a grounding portion, and an outer inclined wall connected to the trunk portion, and a can lid after filling the contents into a bottomed cylindrical can body having one end opened. It has been tightened.
  • the sealed container is any one of a negative pressure container whose internal pressure is lower than atmospheric pressure, a positive pressure container whose internal pressure is higher than atmospheric pressure, or a container similar to atmospheric pressure.
  • the inspection conveyance unit 110 is configured such that the panel portion 152 of the can 150 is formed by a conveyance belt 112 provided on both sides in the width direction orthogonal to the conveyance direction.
  • the eddy current displacement sensor 120 is configured to be transportable so as to face the measurement surface 121.
  • the conveyor belt 112 is composed of a motor, a speed reduction means, and an endless belt wound around the speed reduction means (not shown).
  • the conveyor belt 112 is configured to be able to move forward while the both sides of the carton case 160 perpendicular to the conveyance direction are sandwiched by the conveyor belt 112. is there.
  • a pressing unit that presses the conveyance belt 112 in the direction of the conveyance plate 113 is provided inside the conveyance belt 112.
  • eddy current displacement sensors 120 are provided in a staggered manner at different positions in the transport direction and the width direction so as to correspond to the passing positions of the cans 150 in the carton case 160, respectively.
  • the carton case 160 is preferably transported so that the central portion of the panel portion 152 of the can 150 passes over the central portion of the measurement surface 121 of the eddy current displacement sensor 120. It can also be measured at other locations (for example, near the center).
  • five eddy current displacement sensors 120 are arranged, and the position can be changed in the width direction except for the eddy current displacement sensor 120 at the center so that the can 150 in the carton case 160 can correspond to four rows. It is configured.
  • a pressing mechanism 111 having two upper guides 114 for pressing the carton case 160 toward the transport plate 113 is provided above the transport plate 113 so as to be adjustable in the vertical direction.
  • the movement of the eddy current displacement sensor 120 and the can 150 are prevented from fluctuating during conveyance by suppressing upward movement and vibrations.
  • the can 150 accommodated in the carton case 160 toward the eddy current displacement sensor 120 the can 150 is pushed into the lower surface of the carton case 160, and the measurement surface 121 of the eddy current displacement sensor 120 and the can 150 are Since the distance of the panel part 152 becomes still shorter, the shape of the panel part 152 of the can 150 can be detected with higher resolution.
  • two upper guides 114 are provided along the conveying direction of the carton case 160.
  • the present invention is not limited to this.
  • the top surface of the carton case 160 can be pressed entirely.
  • An upper guide 114 having a large size may be used, and the shape thereof is not limited to a plate member, but may be a roller, a conveyor, or the like.
  • the eddy current displacement sensor 120 has a measurement surface 121 facing the lower surface of the carton case 160 to be conveyed, and in order to make the distance from the panel portion 152 of the bottom portion 151 of the can 150 approach,
  • the measurement surface 121 is provided at a position slightly spaced so that the measurement surface 121 is flush with the conveyance surface of the conveyance plate 113.
  • the distance D1 between the panel portion 152 and the measurement surface 121 is only the sum of the distance D2 from the ground contact portion of the leg portion 153 to the panel portion 152 and the thickness D3 of the bottom plate of the carton case 160 in the can 150,
  • the distance D1 between the panel portion 152 and the measurement surface 121 can be set to 2.0 to 12.0 mm, preferably 2.0 mm to 5.5 mm.
  • a belt conveyor or the like that can be transported by placing a carton case 160 as the transport means of the inspection transport unit 110 may be used.
  • the distance of the belt D1 between the panel unit 152 and the measurement surface 121 is Since the thickness is added, the thickness of the D2 + D3 + belt may be set within the range of 2.0 to 12.0 mm.
  • the distance D1 between the panel unit 152 and the measurement surface 121 is adjusted within a suitable range. Good.
  • the reason why the eddy current displacement sensor 120 is opposed to the lower surface of the carton case 160 is that the carton case 160 is a wrap round type and generally has a flap portion (overlapping portion) on the lower surface side from the viewpoint of openability. Since the eddy current displacement sensor 120 is opposed to the lower surface of the carton case 160, the inspection accuracy is prevented from being lowered.
  • the larger the diameter D4 of the measurement surface 121 of the eddy current displacement sensor 120 the larger D1 can be obtained, but the resolution in the transport direction becomes lower, and the influence of a wide range of shapes other than the panel portion 152 such as the leg portion 153 is affected. It becomes difficult to detect the shape to such an extent that the internal pressure can be sufficiently inspected.
  • the diameter D4 is small, the resolution in the conveyance direction is high, but when D1 is large, the output of the eddy current displacement sensor 120 is small, and the shape is detected to such an extent that the internal pressure can be sufficiently inspected. Becomes difficult.
  • the distance D1 between the panel unit 152 and the measurement surface 121 can be set to 2.0 to 12.0 mm. It becomes possible to detect the exact shape of the panel part.
  • the distance D1 between the panel unit 152 and the measurement surface 121 is 4.6 mm
  • the diameter D4 of the measurement surface 121 of the eddy current displacement sensor 120 is ⁇ 10 mm.
  • the internal pressure inspection system 100 includes a shielding member 170 around the eddy current displacement sensor 120.
  • the eddy current displacement sensor 120 here means a measurement main part including a coil part and the like.
  • the shielding member 170 is a metal hollow cylindrical member, and is used to limit the magnetic flux generated from the measurement surface 121 of the eddy current displacement sensor 120 in the radial direction of the eddy current displacement sensor 120.
  • the shielding member 170 is disposed with a predetermined interval from the eddy current displacement sensor 120, and a desired magnetic flux limit amount can be obtained by adjusting the interval.
  • the axial length of the shielding member 170 is 10 to 100%, preferably 50% or more of the axial length of the eddy current displacement sensor 120, and the measurement surface 121 side of the eddy current displacement sensor 120 is the starting end. It is preferable to be provided.
  • the shielding member 170 may be any metal that can converge the magnetic flux, but aluminum is preferable from the viewpoint of magnetic permeability, magnetic flux persistence, workability, cost, and the like.
  • the eddy current displacement sensor 120 and the shielding member 170 are integrally formed via a spacer 171.
  • the spacer 171 is a cylindrical member made of a non-magnetic material (resin), and is used for adjusting the distance between the eddy current displacement sensor 120 and the shielding member 170 and accurately positioning both members.
  • the spacer 171 is made of resin, the influence on the eddy current displacement sensor 120 and the shielding member 170 can be minimized.
  • the aforementioned predetermined interval or the radial width (thickness) of the spacer 171 may be 1 mm or more.
  • the spacer 171 has a radial width (thickness) of 2.5 mm and the shielding member 170 has an axial length of 20 mm (eddy current displacement).
  • the sensor 120 has an axial length of almost 100%), an inner diameter of 15 mm, an outer diameter of 20 mm, and a radial width (thickness) of 2.5 mm.
  • the magnetic flux generated from the measurement surface 121 of the eddy current displacement sensor 120 is limited in the radial direction of the eddy current displacement sensor 120 to reduce the measurement area. Measurement accuracy can be improved. Further, since the magnetic flux of the eddy current displacement sensor 120 close to the end of the transport plate 113 is limited, the degree of freedom of selection of the peripheral members close to the eddy current displacement sensor 120, particularly the members constituting the inspection transport unit 110. For example, the pressing member used for the transport plate 113, the transport belt 112, or the like is made of metal, and the durability can be improved.
  • the measurement accuracy decreases as the distance between the measurement surface 121 of the eddy current displacement sensor 120 and the panel portion 152 increases. End up.
  • the introduction unit 130 includes an introduction belt conveyor 131 that places and conveys the carton case 160 and an introduction sensor 132 that detects the presence or absence of the carton case 160 from above.
  • the carry-out unit 140 includes a carry-out roller conveyer 143 on which the carton case 160 is placed and conveyed, a discharge mechanism 141 that pushes the carton case 160 including the can 150 determined to be defective by the discharge plate 142, and a side. And a discharge chute 144 for guiding the extruded carton case 160.
  • the introduction unit 130 and the carry-out unit 140 may have any configuration, and the internal pressure inspection system 100 may be configured by only the inspection conveyance unit 110 and may be disposed at an appropriate position on the existing carton case conveyance line. Good. Further, the operation panel 101 may be arranged at an appropriate position, and the operation panel of the internal pressure inspection system itself may be omitted, and the function may be incorporated in the control panel, operation panel, etc. of the existing carton case conveyance line. .
  • FIG. 6 A measurement result by the internal pressure inspection system 100 configured as described above will be described.
  • an aluminum can having a bottom panel diameter of 30 mm and an internal volume of 190 ml is placed on the carton case by means of an eddy current displacement sensor through a general carton case having a bottom plate thickness D3 of 3.0 mm.
  • Results of continuous measurement during passing (conveyance speed: 30 m / min) (FIG. 6A is a measurement result of a reference example, and FIGS. 6B to 6E are measurement results of an embodiment of the present invention) Indicates.
  • the shape of the bottom panel portion is reflected as shown in FIG.
  • the flat output can be obtained only for 10 mm, and the detection accuracy is not sufficient.
  • the flat output reflecting the shape extends up to 18 mm, and the internal pressure can be inspected with high accuracy.
  • the distance D2 from the ground contact portion of the leg portion to the panel portion is set to 3.0 mm
  • the measurement surface diameter D4 of the eddy current displacement sensor is set to ⁇ 10 mm
  • an aluminum shielding member having an inner diameter of ⁇ 25 mm is vortexed through a resin spacer.
  • the distance D2 from the grounding portion of the leg portion to the panel portion is set to 3.0 mm
  • the diameter D4 of the measurement surface of the eddy current displacement sensor is set to ⁇ 10 mm
  • an aluminum shielding member having an inner diameter of ⁇ 15 mm is vortexed through a resin spacer.
  • the output of the eddy current displacement sensor 120 becomes small, and the internal pressure is sufficiently reduced. It becomes difficult to detect the shape to the extent that it can be inspected. In such a case, the measurement value may be corrected as described above. In addition, by performing output amplification of the eddy current displacement sensor 120, it is possible to reduce the measurement range of the object and increase the distance D1 between the measurement surface and the panel portion.
  • FIG. 7 shows the measurement results at different internal pressures in the embodiment of the present invention shown in FIG.
  • the left is the measurement result when the internal pressure is 0 kPa
  • the right is the measurement result when the internal pressure is 45 kPa, and it can be confirmed that the panel portion is greatly bulged downward.
  • FIG. 8 shows the relationship between the internal pressure and the measured value (digit) in FIG.
  • the sealed container applied to the present invention may be any material that can be measured using a displacement sensor, and is preferably a metal container, particularly a steel or aluminum container. It may be a three-piece can having a cap, a bottle-shaped can with a cap, or the like, and if it has a flat panel portion, the object to be measured may be a can lid or a cap.
  • a packing and packaging body a general carton case 160 having a bottom plate thickness D3 of 3.0 mm was used, but the detection accuracy can be improved by further reducing the value of D3,
  • the material is not limited to paper, and may be made of plastic, for example.
  • the shielding member which has a through-hole with the same diameter as the outer diameter of an eddy current displacement sensor may be installed on the conveying plate, or the conveying plate itself may be made of metal to form a through hole having the same diameter as the outer diameter of the eddy current displacement sensor.
  • a configuration for example, a slit that prevents the generation of eddy current is formed on the shielding member. Also good.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

L'objectif de la présente invention est de fournir un système d'inspection de pression interne présentant une configuration simple, au moyen duquel la forme d'une partie de panneau d'un récipient hermétiquement fermé peut être détectée avec une résolution élevée pendant que le réservoir est logé dans un boîtier, et qui est capable de déterminer avec précision si la pression interne régnant dans le récipient fermé hermétiquement est ou non acceptable. Un capteur de déplacement (120) comprend une surface de mesure (121) qui est opposée à une surface inférieure d'un colis emballé (160) qui est transporté. Le colis emballé (160) est configuré de manière à ce qu'il puisse être transporté avec une partie de panneau (152) d'un récipient hermétiquement fermé (150) faisant face à la surface de mesure (121). Un élément de blindage (170) est prévu au voisinage du capteur de déplacement (120).
PCT/JP2016/079301 2015-10-14 2016-10-03 Système d'inspection de pression interne WO2017065036A1 (fr)

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JP2017545153A JP6820461B2 (ja) 2015-10-14 2016-10-03 内圧検査システム

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JP2015202617 2015-10-14

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0666660A (ja) * 1992-08-17 1994-03-11 Daiwa Can Co Ltd 缶内圧検査装置
JPH09159567A (ja) * 1995-12-11 1997-06-20 Mitsubishi Materials Corp 密封容器の内圧検査装置
JPH10332312A (ja) * 1997-06-05 1998-12-18 Tokyo Seimitsu Co Ltd 非接触センサ及び静電容量センサ
JP2004317479A (ja) * 2002-09-26 2004-11-11 Mitsubishi Materials Corp 密閉缶の検査方法及び検査装置並びに密閉缶を梱包したケース
JP2009210451A (ja) * 2008-03-05 2009-09-17 Toyo Seikan Kaisha Ltd 缶詰の内圧検査方法及びその装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63302337A (ja) * 1987-06-03 1988-12-09 Ueno Hiroshi 密封容器内圧検査装置
JP2952727B2 (ja) * 1991-06-25 1999-09-27 ヘルムート フィッシャー ゲーエムベーハー ウント コンパニー インスティテュート フュア エレクトローニク ウント メステヒニク 薄い層の厚さを測定するための方法および装置
JP5203342B2 (ja) * 2009-12-04 2013-06-05 株式会社東芝 渦電流探傷プローブおよびそれを用いた渦電流探傷試験装置
JP5847536B2 (ja) * 2011-10-28 2016-01-27 大和製罐株式会社 密封容器の内圧検査装置および内圧検査方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0666660A (ja) * 1992-08-17 1994-03-11 Daiwa Can Co Ltd 缶内圧検査装置
JPH09159567A (ja) * 1995-12-11 1997-06-20 Mitsubishi Materials Corp 密封容器の内圧検査装置
JPH10332312A (ja) * 1997-06-05 1998-12-18 Tokyo Seimitsu Co Ltd 非接触センサ及び静電容量センサ
JP2004317479A (ja) * 2002-09-26 2004-11-11 Mitsubishi Materials Corp 密閉缶の検査方法及び検査装置並びに密閉缶を梱包したケース
JP2009210451A (ja) * 2008-03-05 2009-09-17 Toyo Seikan Kaisha Ltd 缶詰の内圧検査方法及びその装置

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