WO2017065036A1 - Internal pressure inspection system - Google Patents

Internal pressure inspection system 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
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PCT/JP2016/079301
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French (fr)
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
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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/en
Publication of WO2017065036A1 publication Critical patent/WO2017065036A1/en

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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

The objective of the present invention is to provide an internal pressure inspection system which has a simple configuration, with which the shape of a panel portion of a hermetically sealed container can be detected with a high resolution while the container is accommodated in a case, and which is capable of determining accurately whether or not the internal pressure in the hermetically sealed container is acceptable. A displacement sensor (120) includes a measuring surface (121) which opposes a lower surface of a wrapping package (160) that is being conveyed. The wrapping package (160) is configured in such a way as to be capable of being conveyed with a panel portion (152) of a hermetically sealed container (150) facing the measuring surface (121). A shielding member (170) is provided in the vicinity of the displacement sensor (120).

Description

内圧検査システムInternal pressure inspection system
　本発明は、パネル部を有する密封容器の内圧の良否を、梱包包装体内に複数収容した状態で検出する内圧検査システムに関する。 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.
　従来、金属製の缶体に食料、飲料などを充填し、蓋体を巻き締めして密封容器としたものが幅広く用いられている。
　そして、前記缶体に充填される内容物によっては、密封後に加熱殺菌処理（レトルト殺菌等）が行われ、その後、内容物の漏洩、変敗の有無を確認する内圧検査が行われている。
　密封容器の内圧検査の手法としては、前記加熱殺菌処理後のインライン検査、または、複数の密封容器をケース等に収容、一時保管された後に行われる出荷時検査など、その検査対象の状態及び検査時期によって、接触式、または電磁式、光学式、音響式等の非接触式のものが適宜選択される。 2. Description of the Related Art Conventionally, 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.
Depending on the contents filled in the can body, 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.
　ここで、僅かな密封不良やピンホールの存在、あるいは、殺菌不良による内容物の変質等は、密封後所定時間経過した後に内圧の変化として検出可能となるため、インライン検査に加え、出荷時検査を行うことが好ましい。
　密封容器をケースに収容した状態で検査する出荷時検査の手法として、例えば、特許文献１には、カートンケースに収容されてコンベヤにて搬送される缶詰の上端からトップパネルまでの距離（トップデプス）と、下端からボトムパネルまでの距離（ボトムデプス）とを変位センサによって計測し、前記トップデプス及びボトムデプスの合計値を判定基準値と比較して内圧の良否を判定するように構成された装置が記載されている。
　また、特許文献２には、缶を収納している箱体をハウジングによって押圧することで箱体の厚さをほぼ均一化し、ハウジングと缶との距離をほぼ一定とした状態で、近接センサにより缶までの距離を測定することで、正確な内圧検査を行うことができる密封容器の内圧検査装置が記載されている。
　特許文献３には、容器を搬送する搬送手段と、駆動源が発生する振動を抑制するため、搬送手段と非接触状態で独立して配設された基台に設けられる距離測定手段とを備えた内圧測定装置が記載されている。 Here, slight sealing defects, pinholes, or alteration of contents due to sterilization defects can be detected as changes in internal pressure after a predetermined time has elapsed after sealing. It is preferable to carry out.
As a method of inspection at the time of shipment in which a sealed container is accommodated in a case, for example, 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. Are listed.
Further, in 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.
特許５４５４７５０号公報Japanese Patent No. 5454750 特開平７－１１０２８２号公報JP-A-7-110282 特開２００５－１７２６０６号公報JP 2005-172606 A
　これらの公知のものは、透過性を有する変位センサ、特に、複数の密封容器がケースに収容されたケース検査の場合には渦電流変位センサによって、センサと密封容器外表面との距離を測ることで内圧の良否を判定して検査を行っている。
　しかしながら、渦電流変位センサを用いる場合、ケース材が間に存在してセンサの測定面と容器外表面との距離が大きくなり、その検査精度が低下してしまう。
　これは、渦電流変位センサの測定面が所定面積を有しており、かつセンサの発する磁力線が距離とともに広がる性質を有するため、容器外表面との距離が大きくなるほど、形状変化に対応した出力の変化が小さくなり、カートンケース等に収容されて搬送されていく容器外表面の形状を明瞭に判別することができなくなることによる。この結果、内圧規格から大きく逸脱した密封容器しか検出できなかった。
　特許文献１に記載されたものは、トップデプス及びボトムデプスの合計値を判定基準値とすることで、検査精度を向上させようとするものであるが、多くのセンサを必要とし、装置が高価で複雑となる。
　また、容器の上方はカートンケース等との空隙が存在するため、トップデプスの測定は精度が低く、検査精度の向上には限界があった。 These known ones measure the distance between the sensor and the outer surface of the sealed container by means of a permeable displacement sensor, in particular, in the case of a case inspection in which a plurality of sealed containers are accommodated in a case. The inspection is performed by determining whether the internal pressure is good or bad.
However, when an eddy current displacement sensor is used, the case material exists between them, and the distance between the measurement surface of the sensor and the outer surface of the container is increased, and the inspection accuracy is lowered.
This is because the measurement surface of the eddy current displacement sensor has a predetermined area, and the magnetic field lines generated by the sensor spread with distance, so as the distance from the outer surface of the container increases, the output corresponding to the shape change is increased. This is because the change becomes small, and the shape of the outer surface of the container that is housed and transported in a carton case or the like cannot be clearly identified. As a result, only a sealed container greatly deviating from the internal pressure standard could be detected.
Although what was described in 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.
　また、特許文献２に記載されたものは、近接センサと缶までの距離を一定とすることで測定のばらつきを少なくして検査精度を向上させようとするものである。
　しかしながら、公知の箱体の厚さ及び缶底の形状の場合、近接センサと缶底までの距離が離れているため、缶底の形状を検知する分解能が低く、振動等の他の変動要素による測定のばらつきが生じ、検査精度の向上には限界があった。
　また、特許文献３に記載されたものは、特許文献２に記載されたものの課題のうちの駆動源が発生する振動を抑制することで検査精度を向上させようとするものであるが、全ての変動要素を排除できるものではなく、また、分解能そのものが向上するものではないため、同様に、検査精度の向上には限界があった。 Also, what is described in 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.
However, in the case of the known box thickness and can bottom shape, 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.
Moreover, although what was described in patent document 3 is trying to improve inspection precision by suppressing the vibration which the drive source generate | occur | produces among the problems of what was described in patent document 2, Similarly, there is a limit to the improvement of inspection accuracy because the variable element cannot be eliminated and the resolution itself is not improved.
　本発明は、前述のような課題を解決するものであり、簡単な構成で、ケースに収容した状態の密封容器の外表面の形状を高い分解能で検出でき、密封容器の内圧の良否を精度よく判定可能な内圧検査システムを提供することを目的とする。 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.
　本発明に係る内圧検査システムは、パネル部を有する密封容器の内圧の良否を、梱包包装体内に複数収容した状態で検出する内圧検査システムであって、梱包包装体を搬送する検査搬送ユニットと、前記検査搬送ユニットに設けられた少なくとも１つの変位センサとを有し、前記変位センサは、搬送される梱包包装体の下面に対峙する測定面を有し、前記検査搬送ユニットは、梱包包装体に収容された密封容器のパネル部が前記測定面に対向するように前記梱包包装体を搬送可能に構成されるとともに、前記変位センサの周囲に遮蔽部材を備えることにより、前記課題を解決するものである。 The internal pressure inspection system according to the present invention 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.
　本請求項１に係る内圧検査システムによれば、変位センサの近傍に遮蔽部材を有することにより、変位センサの測定面と密封容器のパネル部との距離が大きくなっても、パネル部の限られた範囲のみを測定することが可能となる。
　このことで、連続して搬送される密封容器のパネル部との距離を精度よく検出して梱包包装体内に収容した状態の密封容器のパネル部の形状を高い分解能で検出でき、密封容器の内圧の良否を精度よく判定可能となる。 According to the internal pressure inspection system according to the first aspect of the present invention, since 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.
本請求項２記載の構成によれば、変位センサの測定面と密封容器のパネル部とが、２．０～１２．０ｍｍの距離に位置するように配置されていることにより、密封容器のパネル部との距離をより精度よく検出することが可能となる。
　本請求項３に記載の構成によれば、遮蔽部材が、被測定物となる密封容器の材料と同様の金属からなる筒状体であるので、密封容器の材料と異なる金属を用いた場合に懸念される変位センサに与える影響を少なくすることができる。
　本請求項４に記載の構成によれば、スペーサを介することで、変位センサと遮蔽部材の間隔を容易に調整するとともに、両者の正確な位置決めを行うことができる。
　また、非磁性体からなるスペーサを用いることで、変位センサと遮蔽部材に与える影響を極小とすることができる。 According to the second aspect of the present invention, since the measurement surface of the displacement sensor and the panel portion of the sealed container are disposed at a distance of 2.0 to 12.0 mm, the panel of the sealed container is provided. It becomes possible to detect the distance to the part with higher accuracy.
According to the configuration of the third aspect of the present invention, since 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.
According to the configuration of the present invention, 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.
　本請求項５に記載の構成によれば、変位センサの測定面と密封容器のパネル部とが、２．０～１２．０ｍｍの距離に位置するように配置されていることにより、密封容器のパネル部との距離をより精度よく検出することが可能となる。
　本請求項６に記載の構成によれば、検査搬送ユニットには、梱包包装体を変位センサ側に押圧する押圧機構が配置されていることにより、振動等の他の変動要素による測定のばらつきを抑制することができるため、梱包包装体を搬送しながら梱包包装体内に収容した状態の密封容器のパネル部の形状を高い分解能で検出できる。また、梱包包装体に収容されている密封容器を変位センサ側に押圧することで、密封容器が梱包包装体の下面に押し込まれ、変位センサの測定面と密封容器のパネル部の距離がさらに短くなることで、密封容器のパネル部の形状をより高い分解能で検出することが可能となる。 According to the configuration of the fifth aspect of the present invention, 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.
According to the configuration of the sixth aspect of the present invention, 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. In addition, 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.
　本請求項７に記載の構成によれば、変位センサが、φ５～１５ｍｍの測定面を有する渦電流変位センサであることにより、変位センサの指向性が高く、密封容器のパネル部の形状をより高い分解能で検出できる。
　また、変位センサの測定面と密封容器のパネル部とが、２．０～１２．０ｍｍの距離に位置するように配置されることで、測定面の面積が小さいことによる検出出力の低下の影響は低減され、検出精度が低下することもない。
　本請求項８に記載の構成によれば、変位センサが、検査搬送ユニットの幅方向に複数個設けられていることにより、密封容器が複数の行列配置で収容されている梱包包装体を一方向に搬送するだけで、全ての密封容器のパネル部の形状を検出できる。
　本請求項９に記載の構成によれば、変位センサが、検査搬送ユニットの幅方向に位置変更可能に設けられていることにより、幅方向の密封容器の数や配置が異なる梱包包装体であっても、密封容器の位置に合わせることが可能となる。 According to the configuration of the seventh aspect of the present invention, since the displacement sensor is an eddy current displacement sensor having a measurement surface of φ5 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.
In addition, since 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.
According to the configuration of the eighth aspect of the present invention, 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.
According to the configuration of the ninth aspect of the present invention, 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.
本発明の一実施形態に係る内圧検査システムの側面図。1 is a side view of an internal pressure inspection system according to an embodiment of the present invention. 本発明の一実施形態に係る内圧検査システムの平面図（押圧機構は省略）。The top view of the internal pressure test | inspection system which concerns on one Embodiment of this invention (a press mechanism is abbreviate | omitted). 本発明の一実施形態に係る内圧検査システムの検査搬送ユニットの正面図。The front view of the test | inspection conveyance unit of the internal pressure test | inspection system which concerns on one Embodiment of this invention. 変位センサと密封容器との位置関係を示す説明図。Explanatory drawing which shows the positional relationship of a displacement sensor and a sealed container. 変位センサに装着される遮蔽部材を示す説明図。Explanatory drawing which shows the shielding member with which a displacement sensor is mounted | worn. 変位センサの形状・位置の違いによる測定される密封容器の底面形状の比較図。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. 内圧の違いによる測定される密封容器の底面形状の比較図。The comparison figure of the bottom face shape of the sealed container measured by the difference in internal pressure. 図７における内圧と測定値（デジット）の関係図。FIG. 8 is a relationship diagram between the internal pressure and the measured value (digit) in FIG. 7.
１００　・・・　内圧検査システム
１０１　・・・　操作盤
１１０　・・・　検査搬送ユニット
１１１　・・・　押圧機構
１１２　・・・　搬送ベルト
１１３　・・・　搬送プレート
１１４　・・・　アッパーガイド
１２０　・・・　渦電流変位センサ（変位センサ）
１２１　・・・　測定面
１３０　・・・　導入ユニット
１３１　・・・　導入ベルトコンベア
１３２　・・・　導入センサ
１４０　・・・　搬出ユニット
１４１　・・・　排斥機構
１４２　・・・　排斥板
１４３　・・・　搬出ローラコンベア
１４４　・・・　排斥シュート
１５０　・・・　缶（密封容器）
１５１　・・・　底部
１５２　・・・　パネル部
１５３　・・・　脚部
１６０　・・・　カートンケース（梱包包装体）
１７０　・・・　遮蔽部材
１７１　・・・　スペーサ
　Ｄ１　・・・　計測間隔（測定面と密封容器のパネル部との距離）
　Ｄ２　・・・　脚部の接地部からパネル部までの距離
　Ｄ３　・・・　カートンケース底面板厚さ
　Ｄ４　・・・　測定面直径 DESCRIPTION OF SYMBOLS 100 ... Internal pressure inspection system 101 ... Operation panel 110 ... Inspection conveyance unit 111 ... Pressing mechanism 112 ... Conveyance belt 113 ... Conveyance plate 114 ... Upper guide 120 ... Eddy current Displacement sensor (displacement sensor)
121 ... Measuring surface 130 ... Introduction unit 131 ... Introduction belt conveyor 132 ... Introduction sensor 140 ... Unloading unit 141 ... Exhaust mechanism 142 ... Exhaust plate 143 ... Unloading roller conveyor 144 ... Exhaust chute 150 ... Can (sealed container)
151 ... Bottom 152 ... Panel 153 ... Leg 160 ... Carton case (packaging package)
170 ... 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
　本発明の一実施形態に係る内圧検査システム１００は、図１乃至図４に示すように、パネル部を有する密封容器である缶１５０の内圧の良否を、梱包包装体であるカートンケース１６０内に複数収容した状態で検出するものであり、カートンケース１６０を搬送しながら缶１５０の内圧を判定する検査搬送ユニット１１０と、カートンケース１６０を検査搬送ユニット１１０に移送する導入ユニット１３０と、検査搬送ユニット１１０から排出されたカートンケース１６０を下流に移送するとともに不良と判定された缶１５０を含むカートンケース１６０を排斥する搬出ユニット１４０と、内圧検査システム１００全体の操作、制御等を行う操作盤１０１とを備えている。
　缶１５０は密封容器であって、胴部及び底部１５１を有し、底部１５１は、その中心に平坦なパネル部１５２、パネル部１５２の周囲に容器内方に窪んだ環状溝、前記環状溝に連接する内方傾斜壁、接地部、及び胴部に連接する外方傾斜壁からなる脚部１５３を備え、その一端が開口した有底筒状の缶体に、内容物を充填後に缶蓋を巻き締めたものである。密封容器としては、内圧が大気圧より低い負圧容器、大気圧より高い陽圧容器、あるいは大気圧と同程度の容器のいずれかのものである。 As shown in FIGS. 1 to 4, the internal pressure inspection system 100 according to an embodiment of the present invention 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.
　検査搬送ユニット１１０は、非磁性体（樹脂製）の搬送プレート１１３上のカートンケース１６０を、搬送方向に直交する幅方向両側方に設けられた搬送ベルト１１２により、缶１５０のパネル部１５２が、渦電流変位センサ１２０の測定面１２１に対向するように搬送可能に構成されている。
　搬送ベルト１１２は図示しないモータ、減速手段、減速手段に巻回された無端ベルトからなり、搬送ベルト１１２により、カートンケース１６０における搬送方向に直交する両側面を挟持した状態で前進移動可能な構成としてある。また、搬送ベルト１１２の内方には、搬送プレート１１３方向に搬送ベルト１１２を押圧する押圧手段が設けられている。これにより、カートンケース１６０を搬送しながら、カートンケース１６０内の缶１５０の位置ズレ、傾きなどを修正して、所定位置に略限定して高精度な測定が可能となる。 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. In addition, a pressing unit that presses the conveyance belt 112 in the direction of the conveyance plate 113 is provided inside the conveyance belt 112. As a result, while the carton case 160 is being transported, the positional deviation, the inclination, etc. of the can 150 in the carton case 160 are corrected, so that highly accurate measurement can be performed substantially limited to a predetermined position.
　搬送プレート１１３には、渦電流変位センサ１２０が、搬送方向及びその幅方向の異なる位置にそれぞれカートンケース１６０内の缶１５０の通過位置に対応するように千鳥状に設けられている。
　ここで、カートンケース１６０は、缶１５０のパネル部１５２の中心部が、渦電流変位センサ１２０の測定面１２１の中心部上を通過するように搬送されることが好適であるが、パネル部１５２のその他の場所（例えば、中心部付近）でも測定可能である。
　本実施形態では５つの渦電流変位センサ１２０が配置され、カートンケース１６０内の缶１５０が４列の場合にも対応できるよう、中央の渦電流変位センサ１２０を除き、幅方向に位置変更可能に構成されている。 On the transport plate 113, 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.
Here, 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).
In this embodiment, 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.
　また、搬送プレート１１３の上方には、カートンケース１６０を搬送プレート１１３側に押圧する２つのアッパーガイド１１４を有する押圧機構１１１が上下方向に調整可能に設けられており、カートンケース１６０が搬送プレート１１３上で上下方向に移動したり振動することを抑制し、渦電流変位センサ１２０の測定面１２１と缶１５０の距離が搬送中に変動することを防止している。
　また、カートンケース１６０に収容されている缶１５０を渦電流変位センサ１２０側に押圧することで、缶１５０がカートンケース１６０の下面に押し込まれ、渦電流変位センサ１２０の測定面１２１と缶１５０のパネル部１５２の距離がさらに短くなることで、缶１５０のパネル部１５２の形状をより高い分解能で検出することが可能となる。なお、本実施形態においては、２つのアッパーガイド１１４がカートンケース１６０の搬送方向に沿って２つ設けられているが、これに限定されず、例えばカートンケース１６０の天面を全体的に押圧可能な大きさのアッパーガイド１１４を用いても良く、またその形状は板部材に限らず、ローラ、コンベア等であってもよい。 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.
Moreover, by pressing 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. In the present embodiment, two upper guides 114 are provided along the conveying direction of the carton case 160. However, the present invention is not limited to this. For example, 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.
　渦電流変位センサ１２０は、図４に示すように、搬送されるカートンケース１６０の下面に対峙する測定面１２１を有し、缶１５０の底部１５１のパネル部１５２との距離を接近させるために、その測定面１２１が搬送プレート１１３の搬送面と同一面となるように僅かに離間した位置に設けられている。
　このため、パネル部１５２と測定面１２１との距離Ｄ１は、缶１５０における脚部１５３の接地部からパネル部１５２までの距離Ｄ２とカートンケース１６０の底面板の厚さＤ３の合計のみとなり、測定面１２１の中心軸に沿って、パネル部１５２と測定面１２１との距離Ｄ１を２．０～１２．０ｍｍ、好適には２．０ｍｍ～５．５ｍｍとすることが可能となる。
　本実施形態では、底面板の厚さＤ３が３．０ｍｍの一般的なカートンケース１６０、測定面１２１と搬送プレート１１３の搬送面との距離が０．１ｍｍ、脚部１５３の接地部からパネル部１５２までの距離Ｄ２が１．５ｍｍの缶１５０を用いることで、パネル部１５２と測定面１２１との距離Ｄ１を４．６ｍｍとしている。
　なお、パネル部１５２と測定面１２１との距離Ｄ１を２．０～１２．０ｍｍとすることができれば、缶１５０の脚部１５３の接地部からパネル部１５２までの距離Ｄ２は１．５ｍｍに限定されず、好適にはＤ２＝１．５～２．５ｍｍである。
　なお、２．０～１２．０ｍｍの距離に位置するように配置するためには、渦電流変位センサ１２０の測定面１２１が検査搬送ユニット１１０の搬送面と同一平面となるように配置する、缶１５０のパネル部１５２がカートンケース１６０に近接する形状とする、検査搬送ユニット１１０が下部ベルトコンベア搬送を採用する場合はベルト厚みを薄くする、カートンケース１６０の下面側の肉厚を薄くする等の構成を採用すればよい。 As shown in FIG. 4, 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.
Therefore, 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, Along the central axis of the surface 121, 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.
In the present embodiment, a general carton case 160 having a bottom plate thickness D3 of 3.0 mm, a distance between the measurement surface 121 and the conveyance surface of the conveyance plate 113 is 0.1 mm, and the ground portion of the leg portion 153 is connected to the panel portion. By using the can 150 having a distance D2 up to 152 of 1.5 mm, the distance D1 between the panel unit 152 and the measurement surface 121 is set to 4.6 mm.
If the distance D1 between the panel portion 152 and the measurement surface 121 can be set to 2.0 to 12.0 mm, the distance D2 from the grounding portion of the leg portion 153 of the can 150 to the panel portion 152 is limited to 1.5 mm. Preferably, D2 = 1.5 to 2.5 mm.
Note that in order to dispose it at a distance of 2.0 to 12.0 mm, the can is disposed such that the measurement surface 121 of the eddy current displacement sensor 120 is flush with the transport surface of the inspection transport unit 110. When the inspection and transport unit 110 adopts the lower belt conveyor transport, the belt thickness is decreased, the wall thickness on the lower surface side of the carton case 160 is decreased, and the like. What is necessary is just to employ | adopt a structure.
　また、検査搬送ユニット１１０の搬送手段として、カートンケース１６０を戴置して運搬可能なベルトコンベア等を使用してもよく、その場合は、パネル部１５２と測定面１２１との距離Ｄ１にベルトの厚みが加わるため、Ｄ２＋Ｄ３＋ベルトの厚みを２．０～１２．０ｍｍの範囲内とすればよい。
　また、前述のように、カートンケース１６０に収容されている缶１５０を渦電流変位センサ１２０側に押圧することで、パネル部１５２と測定面１２１との距離Ｄ１を好適な範囲内に調整すればよい。
　渦電流変位センサ１２０をカートンケース１６０の下面に対峙させる理由としては、カートンケース１６０はラップラウンド式のケースであって、開封性の観点から、一般的に下面側にはフラップ部（重なり部）が作られないことから、渦電流変位センサ１２０をカートンケース１６０の下面に対峙させることで、検査精度の低下を防止している。 Further, 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. In this case, 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.
In addition, as described above, by pressing the can 150 accommodated in the carton case 160 toward the eddy current displacement sensor 120, 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.
　また、渦電流変位センサ１２０の測定面１２１の直径Ｄ４は、大きいほどＤ１を大きく取れるが、搬送方向での分解能が低くなり、脚部１５３等のパネル部１５２以外の広い範囲の形状の影響を受け、充分に内圧を検査できる程度に形状を検出することが難しくなる。
　これに対し、直径Ｄ４が小さい場合、搬送方向での分解能が高くなるが、Ｄ１が大きくなると渦電流変位センサ１２０の出力が小さくなり、やはり、充分に内圧を検査できる程度に形状を検出することが難しくなる。
　ここで、渦電流変位センサ１２０の測定面１２１の直径Ｄ４をφ５～１５ｍｍとすることで、パネル部１５２と測定面１２１との距離Ｄ１を２．０～１２．０ｍｍとすることが可能となり、パネル部の正確な形状を検出することが可能となる。
　本実施形態では、パネル部１５２と測定面１２１との距離Ｄ１を４．６ｍｍとし、渦電流変位センサ１２０の測定面１２１の直径Ｄ４をφ１０ｍｍとしている。 Further, 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.
On the other hand, when 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.
Here, by setting the diameter D4 of the measurement surface 121 of the eddy current displacement sensor 120 to 5 to 15 mm, 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.
In this embodiment, the distance D1 between the panel unit 152 and the measurement surface 121 is 4.6 mm, and the diameter D4 of the measurement surface 121 of the eddy current displacement sensor 120 is φ10 mm.
　さらに、内圧検査システム１００は、図５に示すように、渦電流変位センサ１２０の周囲に遮蔽部材１７０を備えている。
　なお、ここでいう渦電流変位センサ１２０とは、コイル部等を備える測定主要部を意味している。
　遮蔽部材１７０は金属製の中空円筒状の部材であり、渦電流変位センサ１２０の測定面１２１から発生する磁束を渦電流変位センサ１２０の径方向において制限するために用いられる。
　本実施形態においては、遮蔽部材１７０は渦電流変位センサ１２０と所定の間隔を有して配置されており、該間隔を調整することにより、所望の磁束の制限量を得ることができる。
　また、遮蔽部材１７０の軸方向長さは、渦電流変位センサ１２０の軸方向長さの１０～１００％、好適には５０％以上であり、渦電流変位センサ１２０の測定面１２１側を始端として設けられると好適である。
　なお、遮蔽部材１７０は磁束を収束可能な金属であれば良いが、透磁率、磁束残留性、加工性、コスト等の観点からアルミニウムが好ましい。また、被測定物である缶１５０の材料と同様の材料で構成することが好適である。これにより、密封容器の材料と異なる金属を用いた場合に懸念される変位センサに与える影響を少なくすることができる。 Furthermore, as shown in FIG. 5, the internal pressure inspection system 100 includes a shielding member 170 around the eddy current displacement sensor 120.
In addition, 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.
In this embodiment, 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. Moreover, it is preferable to comprise with the material similar to the material of the can 150 which is a to-be-measured object. Thereby, when the metal different from the material of a sealed container is used, the influence given to the displacement sensor concerned about can be decreased.
　また、渦電流変位センサ１２０と遮蔽部材１７０は、スペーサ１７１を介して一体に形成されている。スペーサ１７１は非磁性体（樹脂）からなる円筒状部材であり、渦電流変位センサ１２０と遮蔽部材１７０の前記間隔を調整するとともに、両部材の正確な位置決めを行うために用いられる。本実施形態では、スペーサ１７１を樹脂製としたことで、渦電流変位センサ１２０と遮蔽部材１７０に与える影響を極小とすることができる。
　ここで、前述の所定の間隔、またはスペーサ１７１の径方向の幅（厚み）は１ｍｍ以上あればよい。
　本実施形態においては、φ１０ｍｍの測定面１２１を有する渦電流変位センサ１２０に対し、スペーサ１７１の径方向の幅（厚み）は２．５ｍｍ、遮蔽部材１７０の軸方向長さは２０ｍｍ（渦電流変位センサ１２０の軸方向長さのほぼ１００％）、内径はφ１５ｍｍ、外径はφ２０ｍｍ、径方向の幅（厚み）は２．５ｍｍとなっている。 Further, 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. In the present embodiment, since the spacer 171 is made of resin, the influence on the eddy current displacement sensor 120 and the shielding member 170 can be minimized.
Here, the aforementioned predetermined interval or the radial width (thickness) of the spacer 171 may be 1 mm or more.
In the present embodiment, with respect to the eddy current displacement sensor 120 having the measurement surface 121 of φ10 mm, 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.
　このような構成とすることにより、渦電流変位センサ１２０の測定面１２１から発生する磁束を渦電流変位センサ１２０の径方向において制限して測定面積を小さくすることで、缶１５０のパネル部１５２に対する測定精度を向上させることができる。
　また、搬送プレート１１３の端部に近接する渦電流変位センサ１２０の磁束が制限されることから、渦電流変位センサ１２０に近接する周辺の部材、特に検査搬送ユニット１１０を構成する部材の選択自由度を向上させることができ、例えば、搬送プレート１１３、搬送ベルト１１２等に使用される押圧部材等を金属製として、耐久性を向上させることができる。
　一方、前記径方向に制限された磁束は、同様に高さ方向にも制限されることから、渦電流変位センサ１２０の測定面１２１とパネル部１５２との距離が大きくなると測定精度が低下してしまう。この場合、アンプ（増幅器）、アナログ・デジタル変換器、加算機、補正値設定器等を用いて測定値の補正を行うことが好適である。 By adopting such a configuration, 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.
On the other hand, since the magnetic flux restricted in the radial direction is also restricted in the height direction, 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. In this case, it is preferable to correct the measurement value using an amplifier, an analog / digital converter, an adder, a correction value setting device, or the like.
　導入ユニット１３０は、カートンケース１６０を載置して搬送する導入ベルトコンベア１３１と、上方からカートンケース１６０の有無を検出する導入センサ１３２とを備えている。
　搬出ユニット１４０は、カートンケース１６０を載置して搬送する搬出ローラコンベア１４３と、不良と判定された缶１５０を含むカートンケース１６０を排斥板１４２で側方に押し出す排斥機構１４１と、側方に押し出されたカートンケース１６０を誘導する排斥シュート１４４とを有している。
　なお、導入ユニット１３０及び搬出ユニット１４０は、いかなる構成のものであってもよく、内圧検査システム１００を検査搬送ユニット１１０のみで構成し、既存のカートンケース搬送ラインの適宜の位置に配置してもよい。
　また、操作盤１０１も適宜の位置に配置すればよく、また、内圧検査システム自体の操作盤は省略し、既存のカートンケース搬送ラインの制御盤、操作盤等にその機能が組み込まれてもよい。 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. .
　以上のように構成された内圧検査システム１００による計測結果について説明する。
　図６に、底部のパネル部の直径が３０ｍｍ、内容量１９０ｍｌのアルミニウム製缶を、底面板の厚さＤ３が３．０ｍｍの一般的なカートンケースを介して渦電流変位センサによって前記カートンケースの通過中（搬送速度：３０ｍ／ｍｉｎ）を連続的に計測した結果（図６（ａ）が参考例の計測結果、図６（ｂ）～（ｅ）が本発明の一実施形態の計測結果）を示す。
　脚部の接地部からパネル部までの距離Ｄ２＝３．０ｍｍ、渦電流変位センサの測定面の直径Ｄ４＝φ２０ｍｍの場合、図６（ａ）に示すように、底部のパネル部の形状を反映する平坦な出力が１０ｍｍ分しか得ることができず、検出精度は充分ではない。
　これに対し、脚部の接地部からパネル部までの距離Ｄ２＝３．０ｍｍ、渦電流変位センサの測定面の直径Ｄ４＝φ１０ｍｍの場合、図６（ｂ）に示すように、底部のパネル部の形状を反映する平坦な出力は１８ｍｍ分までのび、精度良く内圧を検査することが可能となる。 A measurement result by the internal pressure inspection system 100 configured as described above will be described.
In FIG. 6, 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.
When the distance D2 from the ground contact portion of the leg portion to the panel portion is 3.0 mm and the diameter D4 of the measurement surface of the eddy current displacement sensor is 20 mm, 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.
On the other hand, when the distance D2 = 3.0 mm from the grounding portion of the leg portion to the panel portion and the diameter D4 = φ10 mm of the measurement surface of the eddy current displacement sensor, as shown in FIG. The flat output reflecting the shape extends up to 18 mm, and the internal pressure can be inspected with high accuracy.
　また、脚部の接地部からパネル部までの距離Ｄ２＝３．０ｍｍ、渦電流変位センサの測定面の直径Ｄ４＝φ１０ｍｍとし、内径φ２５ｍｍのアルミニウム製の遮蔽部材を樹脂製のスペーサを介して渦電流変位センサに取り付けた場合、図６（ｄ）に示すように、底部のパネル部の形状を反映する平坦な出力は２１ｍｍ分までのび、さらに精度良く内圧を検査することが可能となる。
　さらに、脚部の接地部からパネル部までの距離Ｄ２＝３．０ｍｍ、渦電流変位センサの測定面の直径Ｄ４＝φ１０ｍｍとし、内径φ１５ｍｍのアルミニウム製の遮蔽部材を樹脂製のスペーサを介して渦電流変位センサに取り付けた場合、図６（ｅ）に示すように、底部のパネル部の形状を反映する平坦な出力は２４ｍｍ分までのび、さらに精度良く内圧を検査することが可能となる。 Further, 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 φ10 mm, and an aluminum shielding member having an inner diameter of φ25 mm is vortexed through a resin spacer. When attached to the current displacement sensor, as shown in FIG. 6D, the flat output reflecting the shape of the bottom panel portion extends up to 21 mm, and the internal pressure can be inspected more accurately.
Further, 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 φ10 mm, and an aluminum shielding member having an inner diameter of φ15 mm is vortexed through a resin spacer. When attached to the current displacement sensor, as shown in FIG. 6E, the flat output reflecting the shape of the bottom panel portion extends up to 24 mm, and the internal pressure can be inspected more accurately.
　そして、本発明の一実施形態では、脚部の接地部からパネル部までの距離Ｄ２を１．５ｍｍとしてパネル部と測定面との距離を小さくし、渦電流変位センサの測定面の直径Ｄ４＝φ１０ｍｍとすることで、図６（ｃ）に示すように、底部のパネル部の形状を反映する平坦な出力は２７ｍｍ分となり、十分な精度で内圧を検査することが可能となる。
　さらに、渦電流変位センサの測定面の直径Ｄ４＝φ８ｍｍ、またはＤ４＝φ５ｍｍと小さくした場合、搬送方向での分解能が高くなり、底部のパネル部の形状を反映する平坦な出力は十分な測定精度を示すことは、渦電流変位センサの測定面積が小径となること、及び、図６（ａ）及び（ｂ）から明らかであるが、渦電流変位センサ１２０の出力が小さくなり、充分に内圧を検査できる程度に形状を検出することが難しくなる。
　このような場合には、上述のように測定値の補正を行えばよい。
　なお、渦電流変位センサ１２０の出力増幅を行うことで、対象物の測定範囲を小径とし、測定面とパネル部との距離Ｄ１を大きくすることも可能となる。 In one embodiment of the present invention, the distance D2 from the ground contact portion of the leg portion to the panel portion is set to 1.5 mm to reduce the distance between the panel portion and the measurement surface, and the diameter D4 of the measurement surface of the eddy current displacement sensor = By setting the diameter to 10 mm, as shown in FIG. 6C, the flat output reflecting the shape of the bottom panel is 27 mm, and the internal pressure can be inspected with sufficient accuracy.
Furthermore, when the diameter D4 = φ8 mm or D4 = φ5 mm of the measurement surface of the eddy current displacement sensor is reduced, the resolution in the transport direction is increased, and the flat output reflecting the shape of the bottom panel is sufficient for measurement accuracy. As is apparent from FIGS. 6 (a) and 6 (b), 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.
　図６（ｃ）の本発明の一実施形態における、異なる内圧での計測結果を図７に示す。
　左が内圧０ｋＰａの時の計測結果、右が内圧４５ｋＰａの時の計測結果であり、パネル部が大きく下方に膨出していることが確認できる。なお、本実施形態においてはパネル部が膨出した場合を示したが、パネル部が陥没した場合についても同様に計測を行うことができる。
　また、図７における内圧と測定値（デジット）の関係を図８に示す。 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. In addition, although the case where the panel part bulges was shown in this embodiment, it can measure similarly when the panel part is depressed.
FIG. 8 shows the relationship between the internal pressure and the measured value (digit) in FIG.
　本発明に適用される密封容器としては、変位センサを用いて計測可能な材質であればよく、金属製、特にスチール製、またはアルミニウム製の容器が好適であり、形状としては胴部に継ぎ目を有する３ピース缶、キャップ付ボトル型缶などであってもよく、さらに、平坦なパネル部を有していれば測定対象は缶蓋、キャップであってもよい。
　また、梱包包装体としては底面板の厚さＤ３が３．０ｍｍの一般的なカートンケース１６０を用いたが、Ｄ３の値がさらに小さくなることで、検出精度を向上させることができ、さらに、その材料は紙製に限定されず、例えばプラスチック製であってもよい。 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.
In addition, as 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.
　また、渦電流変位センサから発生する磁束を収束させるために遮蔽部材を装着させる例を説明したが、これに限定されず、渦電流変位センサの外径と同径の貫通孔を有する遮蔽部材（例えば、金属板）を搬送プレート上に設置する、あるいは、搬送プレート自体を金属製として渦電流変位センサの外径と同径の貫通孔を形成してよい。
　また、渦電流変位センサから発生する磁束により、遮蔽部材に渦電流が生じ、測定に支障が出る場合には、渦電流の発生を防止する構成（例えば、スリットなど）を遮蔽部材に形成してもよい。 Moreover, although the example which mounts | wears with a shielding member in order to converge the magnetic flux which generate | occur | produces from an eddy current displacement sensor was demonstrated, it is not limited to this, The shielding member which has a through-hole with the same diameter as the outer diameter of an eddy current displacement sensor ( For example, a metal plate) 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.
If the eddy current is generated in the shielding member due to the magnetic flux generated from the eddy current displacement sensor and the measurement is disturbed, a configuration (for example, a slit) that prevents the generation of eddy current is formed on the shielding member. Also good.

Claims (9)

  1. 　パネル部を有する密封容器の内圧の良否を、梱包包装体内に複数収容した状態で検出する内圧検査システムであって、
    　梱包包装体を搬送する検査搬送ユニットと、前記検査搬送ユニットに設けられた少なくとも１つの変位センサとを有し、
    　前記変位センサは、搬送される梱包包装体の下面に対峙する測定面を有し、
    　前記検査搬送ユニットは、梱包包装体に収容された密封容器のパネル部が前記測定面に対向するように前記梱包包装体を搬送可能に構成されるとともに、
    　前記変位センサの周囲に遮蔽部材を備えることを特徴とする内圧検査システム。     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 contained in a plurality of packaging packages,
    An inspection transport unit for transporting the packing and packaging body, and at least one displacement sensor provided in the inspection transport unit;
    The displacement sensor has a measurement surface facing the lower surface of the package to be transported,
    The inspection and transport unit is configured to be able to transport the packaging and packaging body so that the panel portion of the sealed container accommodated in the packaging and packaging body faces the measurement surface,
    An internal pressure inspection system comprising a shielding member around the displacement sensor.
  2. 　前記測定面と前記密封容器のパネル部とが、２．０～１２．０ｍｍの距離に位置するように配置されていることを特徴とする請求項１に記載の内圧検査システム。 2. The internal pressure inspection system according to claim 1, wherein the measurement surface and the panel portion of the sealed container are disposed at a distance of 2.0 to 12.0 mm.
  3. 　前記遮蔽部材は、被測定物となる前記密封容器の材料と同様の金属からなる筒状体であることを特徴とする請求項１又は請求項２に記載の内圧検査システム。 The internal pressure inspection system according to claim 1 or 2, wherein the shielding member is a cylindrical body made of the same metal as the material of the sealed container to be measured.
  4. 　前記変位センサと遮蔽部材が、非磁性体からなるスペーサを介して一体に形成されていることを特徴とする請求項１乃至請求項３のいずれかに記載の内圧検査システム。 The internal pressure inspection system according to any one of claims 1 to 3, wherein the displacement sensor and the shielding member are integrally formed via a spacer made of a non-magnetic material.
  5. 　パネル部を有する密封容器の内圧の良否を、梱包包装体内に複数収容した状態で検出する内圧検査システムであって、
    　梱包包装体を搬送する検査搬送ユニットと、前記検査搬送ユニットに設けられた少なくとも１つの変位センサとを有し、
    　前記変位センサは、搬送される梱包包装体の下面に対峙する測定面を有し、
    　前記検査搬送ユニットは、梱包包装体に収容された密封容器のパネル部が前記測定面に対向するように前記梱包包装体を搬送可能に構成され、
    　前記測定面と前記密封容器のパネル部とが、２．０～１２．０ｍｍの距離に位置するように配置されていることを特徴とする内圧検査システム。     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 contained in a plurality of packaging packages,
    An inspection transport unit for transporting the packing and packaging body, and at least one displacement sensor provided in the inspection transport unit;
    The displacement sensor has a measurement surface facing the lower surface of the package to be transported,
    The inspection and transport unit is configured to be able to transport the packaging and packaging body such that a panel portion of a sealed container accommodated in the packaging and packaging body faces the measurement surface.
    An internal pressure inspection system, wherein the measurement surface and the panel portion of the sealed container are arranged so as to be positioned at a distance of 2.0 to 12.0 mm.
  6. 　前記検査搬送ユニットには、梱包包装体を前記変位センサ側に押圧する押圧機構が配置されていることを特徴とする請求項１乃至請求項５のいずれかに記載の内圧検査システム The internal pressure inspection system according to any one of claims 1 to 5, wherein the inspection transport unit is provided with a pressing mechanism that presses the packaging body toward the displacement sensor.
  7. 　前記変位センサが、φ５～１５ｍｍの測定面を有する渦電流変位センサであることを特徴とする請求項１乃至請求項６のいずれかに記載の内圧検査システム。 The internal pressure inspection system according to any one of claims 1 to 6, wherein the displacement sensor is an eddy current displacement sensor having a measurement surface of φ5 to 15 mm.
  8. 　前記変位センサが、前記検査搬送ユニットの幅方向に複数個設けられていることを特徴とする請求項１乃至請求項７のいずれかに記載の内圧検査システム。 The internal pressure inspection system according to any one of claims 1 to 7, wherein a plurality of the displacement sensors are provided in a width direction of the inspection transport unit.
  9. 　前記変位センサが、前記検査搬送ユニットの幅方向に位置変更可能に設けられていることを特徴とする請求項１乃至請求項８のいずれかに記載の内圧検査システム。 The internal pressure inspection system according to any one of claims 1 to 8, wherein the displacement sensor is provided so that the position of the displacement sensor can be changed in the width direction of the inspection transport unit.
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JPH0666660A (en) * 1992-08-17 1994-03-11 Daiwa Can Co Ltd Pressure detector in can
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