JP2012117899A - Vessel examination method and vessel examination device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vessel examination method and a vessel examination device that permit, when a vessel is to be examined for any small hole or like defect having arisen therein by irradiating the vessel with light to detect any light leak from the wall part of the vessel, efficient and reliable detection of any small hole irrespective of size.SOLUTION: A vessel examination device 100 that irradiates a vessel W with light to detect any small hole in the vessel W according to any light leak from the wall part of the vessel W comprises a rotational carrying mechanism 1 having small hole detecting rotational bodies 2 and 3 that support and rotate the vessel W, a light source 50 that irradiates with light the vessel W supported by the rotational carrying mechanism 1, and a plurality of optical detectors 51 arranged on an examination route M of the vessel W, wherein the optical detectors 51 are provided with optical sensors differing in detection sensitivity from one another, and each optical detector detects small holes belonging to one or another of size ranges differentiated stepwise.

Description

  The present invention relates to a container inspection method and a container inspection apparatus for inspecting defects such as small holes generated in a container by irradiating the container with light and detecting light leakage from the container wall.

  Conventionally, various techniques relating to a container inspection device and a container inspection method for detecting small holes (eg, defects such as pinholes) generated in a container by using light leakage have been disclosed (for example, Patent Document 1, Patents). Reference 2).

  In Patent Document 1, for example, as a can inspection method and inspection apparatus, a light source located above and below a can is controlled with a can to be inspected supported between a support portion and a spindle. A device that repeats ON and OFF is shown.

In this inspection method and inspection apparatus, while the opening of the can passes through the light receiving surface of the light detection sensor, based on the output signal detected by the light detection sensor at the ON timing of the light source, the hole generated in the can The presence or absence is to be detected.
In this inspection method and inspection apparatus, the can is supported at the inspection position by holding the opening side of the can with the support and holding the bottom side of the can with the spindle.

In Patent Document 2, for example, a support portion that supports the outer surface of the container by a pocket portion, a light source that emits light from the outside of the container, and a light detection sensor that detects the light of the light source that leaks inside the container. The container inspection apparatus provided is shown, and the support part is formed of a fluorescent light transmitting material that converts incident light into fluorescence.
In this container inspection apparatus, the can is supported at the inspection position by holding the opening side of the can with the support plate on which the detection unit is arranged and holding the bottom side of the can with the holding table. It has become.

JP 2009-25131 A JP 2009-25130 A

However, in the container inspection method described in the above patent document, when the light detection sensor detects a large small hole generated in the container, the light detected by the light detection sensor may not be detected normally beyond the detection range, Furthermore, there is a problem that it takes time for the light detection sensor to return to a normal state.
On the other hand, when the sensitivity of the light detection sensor is lowered, there is a possibility that light leaking from a small small hole cannot be detected and missed.

  The present invention has been made in view of such circumstances, and inspects defects such as small holes generated in a container by irradiating the container with light and detecting light leakage of the container wall by an optical sensor. Another object of the present invention is to provide a container inspection method and a container detection apparatus capable of efficiently and reliably detecting small holes from large holes generated in a container.

  The present invention has been made in view of the above-described circumstances, and even if there is a small hole on the bottom surface of the can supported by the bottom side support member, the small hole is detected and an accurate container inspection is performed. Provided are a container inspection method and an apparatus for the same.

In order to solve the above problems, the present invention proposes the following means.
The invention according to claim 1 is a container inspection method for irradiating light to a container and detecting a small hole in the container based on light leakage from a wall portion of the container. A plurality of light detection units having different sensitivities are arranged, and small holes having different sizes are detected stepwise for each of the light detection units.

  The invention according to claim 4 is a container inspection device for irradiating light to a container and detecting a small hole in the container based on light leakage from the wall of the container, and rotating to support and rotate the container A rotation transport mechanism having a body, a light source for irradiating light to a container supported by the rotation transport mechanism, and a plurality of light detection units arranged in an inspection path of the container, Photosensors having different detection sensitivities are installed and configured to detect small holes having different sizes step by step for each of the light detection units.

  According to the container inspection method and the container inspection apparatus according to the present invention, the light leakage of the container is detected by the plurality of light detection units having different detection sensitivities arranged in the inspection path. It can be detected reliably.

  Invention of Claim 2 is the container inspection method of Claim 1, Comprising: The magnitude | size of the small hole which can be detected is made small sequentially toward the carrying-out side from the carrying-in side of the said test | inspection path | route. And

  The invention according to claim 5 is the container inspection apparatus according to claim 4, wherein the size of the detectable small hole is set so as to be sequentially reduced from the carry-in side to the carry-out side of the inspection path. It is characterized by doing.

  According to the container inspection method and the container inspection apparatus according to the present invention, the size of the detectable small hole is sequentially reduced from the carry-in side to the carry-out side of the inspection path. Can be detected.

  Invention of Claim 3 is the container inspection method of Claim 1 or Claim 2, Comprising: Detection sensitivity of the said photon detection part which detects a small small hole is set to the said optical detection which detects a large small hole A small hole is detected by making it relatively higher than the detection sensitivity of the portion.

  The invention described in claim 6 is the container inspection device according to claim 4 or 5, wherein the detection sensitivity of the light detection unit for detecting small small holes is set to the light detection for detecting large small holes. It is characterized by being set relatively higher than the detection sensitivity of the part.

  According to the container inspection method and the container inspection apparatus according to the present invention, the detection sensitivity of the light detection unit that detects small small holes is relatively higher than the detection sensitivity of the light detection unit that detects large small holes. The detection sensitivity of the optical sensor can be easily set.

  According to the container inspection method and the container inspection apparatus according to the present invention, when the container is irradiated with light, the light leakage of the container wall is detected by the optical sensor, and defects such as small holes generated in the container are inspected. Small holes can be detected efficiently and reliably from large holes generated in the container.

It is a top view which shows the container inspection apparatus which concerns on one Embodiment of this invention. It is the front sectional view cut | disconnected by the II-II line | wire of FIG. It is a front sectional view showing the front end of the pressing member of the pressing mechanism, (A) is a view when the pressing member is in the retracted position, (B) is a view when the pressing member is in the advanced position. (A)-(E) are process drawings for demonstrating operation | movement of a press mechanism, (A ') is a figure which shows the AA arrow in FIG. 4 (A).

An embodiment of the present invention will be described with reference to FIGS.
1 and 2 are views showing a container inspection apparatus 100 according to the present invention. For example, a small hole of a container W including a casing of a lithium battery is an inspection object.
As shown in FIG. 3, the container W is formed into a bottomed cylindrical shape having an opening W1 on one side and a bottom W2 on the other side, and a convex portion W3 protruding to the other end is formed on the bottom W2. A peripheral edge portion W4 is formed on the outer periphery of the convex portion W3.

In FIG. 1, what is indicated by reference numeral 1 is a rotary transport mechanism for supporting the container W to be inspected and transporting it to the inspection position C, and is installed on the base B.
The rotary conveyance mechanism 1 includes small hole detection rotators 2 and 3 that detect small holes by irradiating light from the light source 50 onto the container W, and the small hole detection rotators 2 and 3. Conveying rotating bodies 4 to 6 for supplying or discharging, and a pressing mechanism 90 (described later) for pressing the container W against the small hole detecting rotating bodies 2 and 3 are provided.

  As shown in FIG. 1, in the rotary conveyance mechanism 1, the small hole detection rotators 2, 3 rotate counterclockwise (arrow b direction), and the conveyance rotators 4-6 rotate clockwise (arrow a direction). The container W has a small hole inspection path (inspection) arranged in the order of the transport rotator 4, the small hole detection rotator 2, the transport rotator 5, the small hole detection rotator 3, and the transport rotator 6. Route) M is moved.

  The small hole inspection path M is arranged from the upstream side (loading side) in the order of the transport rotator 4, the small hole detection rotator 2, the transport rotator 5, the small hole detection rotator 3, and the transport rotator 6.

  The small hole detecting rotators 2 and 3 and the conveying rotators 4 to 6 support a plurality of containers W at regular intervals along the peripheral edge. The small hole detecting rotators 2 and 3 and the conveying rotators 4 to 6 have their rotation axes 2A to 6A arranged in parallel with each other along the arrow cd direction which is the vertical direction.

  The transport rotator 4, the small hole detection rotator 2, the transport rotator 5, the small hole detection rotator 3, and the transport rotator 6 are formed so that their peripheral portions overlap each other. The container W is delivered by the guide 13.

Next, the small hole detection rotating bodies 2 and 3 will be described in detail with reference to FIGS. 1 and 2.
The small hole detection rotators 2 and 3 have the same basic configuration, so only one small hole detection rotator 2 will be described, and the other small hole detection rotator 3 will be denoted by the same reference numeral and overlapped. The description that has been made will be omitted.

  The small hole detecting rotator 2 includes a rotating plate 21 formed in a circular shape in a plan view driven by a driving shaft 20 driven by a driving mechanism (not shown), and the rotating plate (opening side support) 21. A large number of recesses 22 that support the opening W1 side of the container W at regular intervals are arranged along the peripheral edge.

The drive shaft 20 is provided with a pressing mechanism 90 for pressing the opening W1 side of the container W against the concave portion 22 of the turntable 21.
The pressing mechanism 90 is provided at an interval with respect to the arrow cd direction along the axis of the turntable 21, and corresponds to the second turntable 30 that rotates together with the turntable 21 and the recess 22 of the turntable 21. A movable member 31 that is disposed and is provided so as to be movable back and forth in the direction of the arrow cd and presses the bottom W2 of the container W; and a transport jig 32 that holds the container W when the movable member 31 is in the retracted position. And a cam mechanism 33 for driving the moving member 31 in the direction of arrow cd.

  The moving member 31 is disposed between the first moving member 31A, the second moving member 31B, the rotating disk 21 and the second rotating disk 30, and is divided and arranged in the circumferential direction around the axis A. A jig holding member 31C, the conveying jig holding member 31C is connected to the distal end side (upper part) of the first moving member 31A and is moved together with the first moving member 31A, and the second moving member 31B is The first moving member 31A is movable relative to the first moving member 31A.

  Further, as shown in FIG. 3, the moving member 31 is supported by the second turntable 30 so as to be movable in the direction of the arrow cd, the lower end thereof is connected to a cam mechanism 33 (described later), and the second A pressing member 40 is provided above the moving member 31B.

  As shown in FIG. 3, the conveyance jig 32 has a form in which a through hole formed corresponding to the large diameter portion and the convex portion W3 of the container W is formed in a cylindrical container body. The abutting member 41 can be inserted into the through-hole from below, and the container W is supported and lifted from below. The white squares shown between the outer periphery of the transport container and the through holes indicate iron pieces and can be held by a magnet provided on the moving member 31.

  With this configuration, when the container W mounted on the transport jig holding member 31C is moved together with the transport jig 32, the first moving member 31A and the second moving member 31B move together, and the container W is held by the transport jig. When pushing up from the member 31 </ b> C, the second moving member 31 </ b> B moves together with the pressing member 40 in the direction of arrow C (upward) to separate the container W from the conveying jig 32 and to press against the recess 22 of the turntable 21. It has become.

When the first moving member 31A and the second moving member 31B move together, the cam plates 43 and 43 are formed to draw the same shape (cam locus), and the second moving member 31B transports the container W to the jig. When it is separated from 32 and pressed against the recess 22 of the turntable 21, the cam plate 43 on the side corresponding to the second moving member 31B is formed to be positioned above.
As a result, both the first moving member 31A, the second moving member 31B, and the pressing field 40 can be moved at high speed and reliably.

  In addition, the moving member 31 is provided between the contact member 41 made of, for example, transparent acrylic that can transmit light emitted from the light source 50 (described later), and the front end of the pressing member 40 and the contact member 41. And a reflecting plate 42 that reflects the light from the light source 50 toward the container W side.

As a result, when the moving member 31 is advanced in the direction of the arrow c by the cam mechanism 33 in a state where the container W is disposed on the contact member 41, the moving member 31 rotates so that the opening W1 of the container W is positioned upward. It fits in the recess 22 of the board 21 and is pressed against the surface of the rotating board 21.
Further, when the moving member 31 is retracted in the direction of the arrow d by the cam mechanism 33, the opening W <b> 1 of the container W is separated from the concave portion 22 of the turntable 21.

  Further, as shown in FIG. 3, the contact member 41 is configured such that the bottom W2 of the container W is in contact with the upper surface on the arrow c side, and is formed on the bottom W2 of the container W at the contact point with the container W. A recessed portion 41A is formed so that the projected portion W3 is fitted.

  Further, the transport jig 32 has a structure having a concave placement portion 32A so that the bottom portion W2 of the container W is placed, and the pressing member 40 is lowered in the arrow d direction by the cam mechanism 33 (described later). In addition, the peripheral edge W4 of the container W supported by the pressing member 40 is placed in a state of being fitted on the concave placement portion 32A.

  The cam mechanism 33 is disposed on the base B and is provided at the lower end portion of the cam plates 43, 43 formed on the base member B corresponding to the moving member 31 and along the upper surface of the cam plate 43. The rotating disk 21 and the second rotating disk 30 are rotated via the drive shaft 20 so that the pressing member 40 moves up and down in the direction of the arrow cd. It has become.

  As shown in FIG. 1, a plurality of light sources 50 that irradiate the container W from the surroundings and light for detecting light leakage of the light source 50 that has passed through the container W are provided on one side of the small hole detection rotating bodies 2 and 3. A detection unit 51 and a container detection sensor 54 are provided.

  The light source 50 irradiates light from the outside to the container W supported by the pressing mechanism 90. When there is a small hole on the peripheral surface of the container W, the light from the light source 50 is transmitted to the container W. It leaks into the inside through a small hole from the wall of W.

In this embodiment, since the bottom W2 of the container W is supported by the pressing member 40 via the contact member 41 and the reflection plate 42 made of a transparent material, the light beam irradiated from the light source 50 is reflected on the reflection plate. Reflected by 42 and transmitted through the contact member 41, the bottom W <b> 2 of the container W is irradiated. As a result, when there is a small hole in the bottom portion W2, the light from the light source 50 reaches the inside of the container W through the small hole.
Further, since the light source 50 is accommodated in the cover 52 that blocks light from the outside, the light irradiation to the container W can be efficiently performed.

  As shown in FIGS. 2 to 4, the light detection unit 51 is provided with a light sensor 51 </ b> A in the recess 22 of the turntable 21 so as to face the opening W <b> 1 of the container W, and the light sensor 51 </ b> A. The light leakage from the light source 50 due to the small holes generated in the container W is detected based on the detection signal from. In addition, what was shown to FIG. 4 (A ') has shown the moving member 31 shown by arrow AA in FIG. 4 (A). In FIG. 4A ′, the container W is indicated by a two-dot chain line. ,

  The light detection unit 51 is provided in each of the small hole detection rotators 2 and 3, and the detection sensitivity of the optical sensor 51 </ b> A of the small hole detection rotator 2 is defined as the detection sensitivity of the optical sensor 51 </ b> A of the small hole detection rotator 3. Are set differently.

  For example, in each light detection unit 51, the upstream small hole detection rotating body 2 sets the detection sensitivity of the optical sensor 51 </ b> A to be relatively low in order to detect a large small hole, and on the downstream side (unloading side). In the small hole detection rotating body 3, both the large small hole and the small small hole generated in the container W can be detected by setting the detection sensitivity of the optical sensor 51 </ b> A to be relatively high in order to detect the small small hole. I am doing so.

The container detection sensor 54 is composed of, for example, a light source tube or the like, and detects the container W passing therethrough and determines the station to which the container W of the small hole detection rotating bodies 2 and 3 is mounted. .
Further, the light source 50 receives information on the presence / absence of the container W in the small hole detection rotating bodies 2 and 3 and irradiates light when the container W is present, and does not irradiate light when the container W is not present. It is configured as follows.
With this configuration, light is not irradiated when there is no container W, so that the optical sensor 51A is prevented from receiving excessive light from the light source 50 and detecting excessive light. Further, for example, even if a defective product having a large small hole detected in the small hole detection rotating body 2 is discharged to the arrow Q in the transport rotating body 5, wasteful irradiation of light is performed in the small hole detection rotating body 3. Is prevented.

In addition, the conveyance rotating bodies 5 and 6 positioned on the downstream side of the small hole detecting rotating bodies 2 and 3 are provided with an exclusion mechanism (not shown) for removing the defective container W in which the small holes are detected. ing.
This exclusion mechanism is driven when the light detection unit 51 located in each of the small hole detection rotating bodies 2 and 3 detects a small hole in the container W, and the container W in which the small hole is detected is indicated by an arrow, for example. According to Q, they are excluded from the small hole inspection path M.

Next, the operation of this embodiment will be described with reference to FIGS.
[1] As shown in FIG. 1, the container W transported by the rotation of the transport rotating body 4 in the direction of arrow a is delivered to the small hole detecting rotating body 2 by the guide of the guide member 10.

[2] As shown in FIGS. 3A and 4A, the container W delivered to the small hole detection rotating body 2 has a peripheral edge W4 formed on the bottom W2 mounted on the conveying jig 32. It is mounted on the mounting portion 32A in a state of being fitted in the mounting portion 32A. At this time, the pressing member 40 of the pressing mechanism 90 is located below the arrow d side.

[3] As shown in FIGS. 3 (A) and 3 (B) and FIGS. 4 (A) to 4 (C), the cam mechanism 33 presses the small hole detecting rotator 2 in the direction of arrow b. The member 40 moves in the arrow c direction, and the container W supported by the pressing member 40 also moves in the same direction.
As a result, the opening W1 of the container W supported by the pressing member 40 is in contact with and pressed against the recess 22 of the turntable 21.

[4] When the container W is positioned in the vicinity of the light detection unit 51 that becomes the inspection position C (see FIG. 4C) by the rotation of the small hole detection rotating body 2, the container W is irradiated with light from the light source 50. The Here, when the optical sensor 51A on the opening W1 side of the container W detects light leakage from the light source 50, the light detection unit 51 detects that the container W has a small hole.
And since the bottom part W2 is supported by the pressing member 40 via the contact member 41 and the reflecting plate 42 which consist of transparent materials, the container W to which the light from the light source 50 is irradiated, and the light ray from the light source 50 is received. Then, the light is reflected by the reflecting plate 42 and transmitted through the contact member 41 to be applied to the bottom W2 of the container W.
As a result, when there is a small hole in the bottom W2, the light from the light source 50 reaches the inside of the container W through the small hole and is detected by the optical sensor 51A.
In addition, in the light detection unit 51 installed in the small hole detection rotator 2, the detection sensitivity of the optical sensor 51A is set to be relatively low (that is, set to be lower than the detection sensitivity of the optical sensor 51A in the small hole detection rotator 3). This makes it possible to detect a large small hole formed in the container W.

[5] When the small hole detecting rotator 2 further rotates in the direction of arrow b, as shown in FIGS. 4D and 4E, the pressing member 40 moves in the direction of arrow d by the guidance of the cam mechanism 33, and rotates. The support of the opening W1 of the container W by the recess 22 of the board 21 is released.
As a result, as shown in FIG. 3A, the peripheral portion W4 of the container W supported by the pressing member 40 is fitted and placed on the concave placement portion 32A.

[6] When the small hole detecting rotator 2 further rotates in the direction of the arrow b, the container W that has been subjected to the small hole inspection by the small hole detecting rotator 2 is delivered to the conveying rotator 5 by the guide of the guide member 11. Here, when the light detection unit 51 has detected a small hole in the container W in the step [4], a small hole is formed in the transport rotator 5 based on the detection result of the light detection unit 51. The detected container W is excluded. Further, in the step [4], when the light detection unit 51 does not detect the small hole of the container W, the container W is continuously transported by the transport rotating body 5 as it is.

[7] The container W in which no small hole is detected in the step [4] is transferred to the next small hole detection rotating body 3 by the guide member 12.
The container W delivered to the small hole detection rotating body 3 is inspected for small holes by the same processes as in the above [2] to [6].
The light detection unit 51 installed in the small hole detection rotator 3 sets the detection sensitivity of the optical sensor 51A to be relatively high (that is, set higher than the detection sensitivity of the optical sensor 51A in the small hole detection rotator 2). ing.
As a result, the small holes formed in the container W can be detected, and the container W in which the small holes are detected by the light detection unit 51 of the small hole detection rotating body 3 is detected by the transport rotating body 6 on the downstream side. According to the arrow Q, it is excluded out of the small hole inspection path M. The container W in which the small holes are not detected by the light detection unit 51 of the small hole detection rotating body 3 is sent to the next process (not shown) through the next transport rotating body 6.

  According to the container inspection apparatus 100 according to the present embodiment, a plurality of small hole detection rotating bodies 2 and 3 that support and rotate the container W are disposed in the small hole inspection path M of the container W, and the small hole detection rotating body is arranged. An optical sensor 51A having a relatively low detection sensitivity is disposed in order to detect a large small hole in FIG. 2, and the detection sensitivity is relatively high in order to detect a small small hole in the small hole detection rotating body 3. Since the set optical sensor 51A is disposed, small and large holes generated in the container W can be detected efficiently and reliably.

  Further, according to the container inspection apparatus 100, the abutting of the pressing member 40 that abuts against the bottom W2 of the container W and presses against the rotating plate 21 of the small hole detecting rotator 2, 3 when moving forward (moving in the arrow c direction). Since the member 41 is formed of a transparent material, it is possible to efficiently irradiate the bottom W2 with the light of the light source 50 via the contact member 41 and to detect small holes generated in the bottom W2 efficiently and reliably. As a result, the reliability of the inspection of the container W can be improved.

  When the light detection unit 51 detects a small hole in the container W in the small hole detection rotating bodies 2 and 3, the container W in which the small hole is detected is moved downstream of the small hole detection rotating bodies 2 and 3. Can be discharged out of the small-hole inspection path M from the conveying rotators 5 and 6 arranged in the position.

Note that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the invention.
For example, in the above embodiment, the case where the light source 50 is arranged outside the container W and the optical sensor 51A is arranged inside the container W has been described. For example, the light from the light source 50 arranged inside the container W is used. May be detected by an optical sensor arranged outside the container W (an optical sensor in a state where external light is blocked).

Further, in the above embodiment, the two small hole detection rotating bodies 2 and 3 are provided with the light detection units 51 having different detection sensitivities so that light leakage in the wall portion of the container W is detected, and the large and small small holes are formed. Although the case of detection has been described, a plurality of (including 3 or more) light detection units 51 may be provided in one small hole detection rotator instead of the small hole detection rotators 2 and 3. For example, it is good also as a structure which provided the 3 or more small hole detection rotary body.
Moreover, instead of the small and large holes, the detection target may be applied to small holes having a plurality of sizes that are appropriately determined in stages.

  Moreover, in the said embodiment, although the case where the container W was a container of a lithium battery was demonstrated, for example, other containers, such as a container (can body) including the container of an alkaline battery, and a container for drinks, are used. Needless to say, this is applicable.

  Further, in the above embodiment, the detection sensitivity of the light detection unit 51 arranged on the upstream side of the small hole inspection path M is set to be relatively low, and the light detection located on the downstream side of the small hole inspection path M is performed. Although the case where the detection sensitivity of the part 51 is set relatively high has been described, for example, the detection sensitivity of each light detection part is set according to the state of small hole detection by providing a setting range (upper limit, lower limit) for the detection sensitivity. May be set arbitrarily.

  Moreover, in the said embodiment, in the small hole detection process shown by FIG. 4 (A)-(E), for example, in the process of FIG. May be added to the container W by detecting leakage of air from the container W.

  Moreover, in the said embodiment, although the case where the contact member 41 was the structure which permeate | transmits light was demonstrated, you may use the contact member of the structure which does not permeate | transmit light.

  In the above-described embodiment, the case where the contact member 41 is a transparent acrylic resin has been described. However, for example, if the amount of light necessary for small hole detection can be transmitted, the contact member 41 may not be transparent. Alternatively, the contact member 41 may be formed of a resin other than acrylic, such as polycarbonate, glass, ceramics, or the like.

  Moreover, although the case where the reflecting plate 42 which reflects the light irradiated from the light source 50 to the container W side was provided between the front end of the pressing member 40 and the contact member 41, through the transparent contact member 41, When the light from the light source 50 reaches the bottom surface W2 of the container W, the reflector 42 may be omitted.

  According to the container inspection method and the container inspection apparatus according to the present invention, the light leakage to the container wall portion of the light irradiated to the container is detected step by step by the optical sensors having different sensitivities, so that large and small holes generated in the container are efficiently processed. Can be detected accurately and reliably.

DESCRIPTION OF SYMBOLS 1 Rotation conveyance mechanism 2 Small hole detection rotator 3 Small hole detection rotator 4 Conveyance rotator 5 Conveyance rotator 6 Conveyance rotator 32 Conveying jig 33 Cam mechanism 40 Press member 41 Contact member 42 Reflector plate 50 Light source 51 Light detection part 51A Optical Sensor 90 Pressing Mechanism 100 Container Inspection Device W Container W1 Opening W2 Bottom M Mole Inspection Path

Claims (6)

A container inspection method for irradiating light to a container and detecting a small hole in the container based on light leakage from the wall of the container,
A container inspection method comprising: disposing a plurality of light detection units having different detection sensitivities in an inspection path of the container, and detecting small holes having different sizes step by step for each of the light detection units. The container inspection method according to claim 1,
A container inspection method, wherein the size of the detectable small hole is sequentially reduced from the carry-in side to the carry-out side of the inspection path. The container inspection method according to claim 1 or 2,
A container inspection method for detecting small holes by making the detection sensitivity of the light detection unit for detecting small small holes relatively higher than the detection sensitivity of the light detection unit for detecting large small holes. . A container inspection device for irradiating light to a container and detecting a small hole in the container based on light leakage from a wall of the container,
A rotating transport mechanism having a rotating body for supporting and rotating the container;
A light source for irradiating light to a container supported by the rotary transport mechanism;
A plurality of light detectors arranged in the inspection path of the container,
A container inspection apparatus, wherein the light detection units are configured to detect small holes having different sizes in stages for each of the light detection units, each having a light sensor having a different detection sensitivity. . The container inspection device according to claim 4,
The container inspection apparatus is characterized in that the size of the detectable small hole is set so as to gradually decrease from the carry-in side to the carry-out side of the inspection path. The container inspection device according to claim 4 or 5,
A container inspection apparatus, wherein the detection sensitivity of the light detection unit for detecting small small holes is set to be relatively higher than the detection sensitivity of the light detection unit for detecting large small holes.

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