JP2018179828A - Liquid leakage detector and liquid leakage inspection system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid leakage detector and liquid leakage inspection system having improved detection accuracy for liquid leakage.SOLUTION: A liquid leakage detector has a continuous rectangular uneven cross sectional shape formed by an insulator, a first conductor connected to an electrode with a first polarity and a second conductor connected to an electrode with a second polarity different from the first polarity. The concave part of the cross sectional shape has a bottom surface formed by the insulator, and a side surface formed by the first conductor and second conductor. The liquid leakage detector is formed by spirally winding wire-like first and second conductors on an outer periphery of a cylindrical insulator. Also, the liquid leakage detector is formed by laminating disc-like first and second conductors through a disc-like insulator so that polarities are generated alternately.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a liquid leak detection device and a liquid leak inspection system.

  The technique which test | inspects the liquid leak of the package with which the content containing the liquid was filled is disclosed, and Unexamined-Japanese-Patent No. 2008-128828 (patent document 1) etc. are known.

  Patent Document 1 discloses a wire-wound detection roller in which two conductors connected to electrodes of different polarities are respectively disposed in two spiral grooves provided on the surface of a cylindrical insulator. ing. In addition, Patent Document 1 discloses a disc-stacked detection roller in which two ring-shaped electrode plates connected to electrodes of different polarities are alternately stacked with a ring-shaped insulator interposed therebetween. It is done.

  According to Patent Document 1, when there is a liquid leaking from the package, the liquid leakage can detect the liquid leakage by shorting the two conductors. FIG. 6 shows a liquid leak detection device according to the prior art described in Patent Document 1. As shown in FIG.

  However, in the wire winding type detection roller described in Patent Document 1, as shown in FIG. 6A, the cross-sectional shape of the conductors 101a and 102a is circular. Therefore, the adhesion between the conductors 101 and 102 and the leak L may not be sufficiently secured.

  Further, as shown in FIG. 6B, the outer diameters of the conductors 101a and 102a and the insulator 110 are the same for the disc-stacked detection roller described in Patent Document 1 as well. Therefore, as in the wire winding method, sufficient adhesion between the conductors 101 and 102 and the leak L may not be obtained.

  Therefore, when the amount of leakage is very small, the adhesion between the conductor and the leakage may be insufficient. That is, there was a case where it was not possible to short-circuit the adjacent conductors due to the leakage and detection of the leakage could not be made. Therefore, a technique for improving the accuracy of detecting a small amount of liquid leakage has been required.

  The present invention has been made in view of the problems in the above-mentioned prior art, and it is an object of the present invention to provide a liquid leak detection device and a liquid leak inspection system with improved detection accuracy of liquid leakage.

That is, according to the present invention, the insulator, the first conductor connected to the electrode of the first polarity, and the second conductor connected to the electrode of the second polarity different from the first polarity Has a continuous rectangular asperity cross-sectional shape to be formed,
A liquid leak detection device is provided, wherein the recess having the cross-sectional shape has a bottom surface formed by the insulator and a side surface formed by the first conductor and the second conductor.

  As described above, according to the present invention, a liquid leak detection device and a liquid leak inspection system with improved detection accuracy of liquid leakage are provided.

BRIEF DESCRIPTION OF THE DRAWINGS The block diagram of the liquid leak test | inspection system in this embodiment. FIG. 6 is a view for explaining detection of a liquid leak in the liquid leak detection device of the present embodiment. FIG. 6 is a view for explaining the adhesion of liquid leakage of the liquid leak detection device according to the present embodiment. The figure which shows the structure of the liquid leak detection apparatus in a 1st Example. The figure which shows the structure of the liquid leak detection apparatus in 2nd Example. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 shows a liquid leak detection device according to the prior art.

  Hereinafter, the present invention will be described by way of embodiments, but the present invention is not limited to the embodiments described later. In the drawings referred to below, the same reference numerals are used for the common elements, and the description thereof will be omitted as appropriate.

  FIG. 1 is a block diagram of a liquid leak inspection system in the present embodiment. The liquid leakage inspection system is a system that inspects liquid leakage of contents caused by seal defects of the package 30, pinholes (hereinafter referred to as "defective points"), etc. A conveyor 20 is included.

  As shown in FIG. 1, in the liquid leakage inspection system according to the present embodiment, the package 30, which is a transported object, is transported from the transport conveyor 40a at the front stage through the crimping conveyor 20 to the transport conveyor 40b at the rear stage. The opening of the package 30 is crimped and sealed in the crimping conveyor 20 on the way of conveyance on the package 30.

  At this time, if there is a defect in the package 30 due to a failure in pressure bonding, breakage of the package, or the like, the contents leak from the defect. The package 30 is conveyed while being pinched by the belt of the upper crimping conveyor 20a and the belt of the lower crimping conveyor 20b. Therefore, when there is leakage of the contents, the leakage L adheres to the belt of the pressure-bonding conveyor 20.

  The liquid leakage L adhering to the belt reaches the liquid leak detection device 10 as the belt advances, and the liquid leak detection device 10 detects a defect of the package 30. Since the liquid leak detection device 10 is in contact with the surface of the belt, the liquid leak detection device 10 rotates as the belt advances. In addition, when the advancing speed of the belt is particularly high, the liquid leak detection device 10 may be provided with a mechanism that rotates in synchronization with the advancing of the belt.

  It is preferable that the distance between the two crimping conveyors 20a and 20b can be adjusted by moving the position of the upper crimping conveyor 20a or the lower crimping conveyor 20b in the vertical direction. For example, by making the distance between the pressure-adjusting conveyors 20a and 20b smaller than the height of the package 30, the package 30 can be pressed with an appropriate pressure. By this, when there is a defective portion, leakage of contents from the defective portion can be promoted, and the liquid leakage L can be easily attached to the belt of the crimping conveyor 20. In addition, in order to improve the contact between the belt and the package 30, a plurality of rollers arranged along the conveyance direction of the belt can be provided on the inside of the belt of the crimping conveyor 20.

  Below, the liquid leak detection apparatus 10 of this embodiment is demonstrated using FIGS. The liquid leak detection device 10 of the present embodiment can be classified into a wire winding type and a disc lamination type depending on its configuration, and will be described as a first example and a second example, respectively. FIG. 2 is a diagram for explaining the detection of a liquid leak in the liquid leak detection device 10 of the present embodiment. In FIG. 2, the wire wound type liquid leakage detection device 10 is described as an example, but the same applies to a disk laminated type.

  The liquid leak detection device 10 according to the present embodiment includes a first conductor 101 and a second conductor 102 which are electrically isolated from each other, and the first conductor 101 is connected to the anode of the power supply 120, and the second Conductor 102 is connected to the cathode of power supply 120. Also, a device for detecting current is disposed between the power supply 120 and any of the conductors. Although the ammeter 130 is described in FIG. 2 as an example of a device for detecting a current, the present invention is not limited to this. For example, the current may be detected by switching a transistor or the like.

  When the package 30 is normal and there is no liquid leakage, as shown in FIG. 2A, the first conductor 101 and the second conductor 102 are electrically insulated, and liquid leakage is detected. The circuit of device 10 is open. Therefore, the ammeter 130 does not detect the current, and it is determined that the package 30 has no liquid leakage.

  On the other hand, when liquid leaks from the package 30, as shown in FIG. 2B, the liquid leakage L enters between the first conductor 101 and the second conductor 102. At this time, the first conductor 101 and the second conductor 102, which are normally insulated, are short-circuited by the leak L, and a current flows as indicated by the arrow in FIG. 2 (b). Here, when the ammeter 130 detects the current, it can be detected that a liquid leak has occurred in the package 30.

  Next, the adhesion between the liquid leakage L and the conductors 101 and 102 according to the liquid leak detection device 10 of the present embodiment will be described. FIG. 3 is a view for explaining the adhesion of the liquid leakage L of the liquid leak detection device 10 according to the present embodiment, and is an enlarged view of a cross section of the liquid leak detection device 10. In FIG. 3, although the wire wound type liquid leakage detection apparatus 10 is described as an example, the function is the same even if it is a disk laminated type.

  As shown in FIG. 3, in the cross-sectional shape of the liquid leak detection device 10 of the present embodiment, continuous rectangular irregularities are formed by the insulator 110 and the conductors 101 and 102. The concave and convex portion is formed by the insulator 110 at the bottom and the conductors 101 and 102 at the side. Moreover, the convex part of this unevenness | corrugation is formed of the conductors 101 and 102. FIG. Such a cross-sectional shape can improve the accuracy of detecting the leak L.

  FIG. 3A is a cross-sectional view showing a state in which the liquid leakage L adheres to the liquid leak detection device 10 and contacts the conductor 100. The leaked liquid L adheres between the conductor 101 a and the conductor 102 a of the liquid leak detection device 10.

  Here, the leaked liquid L which has entered contacts the conductor 101a and the conductor 102a, and short-circuits the respective conductors in the open state. That is, as shown in FIG. 3B, the liquid leakage L is drawn to the inside of the recess formed by the conductors 101a and 102a and the insulator 110 by capillary action. Therefore, the shape of the water droplet of the leak L is deformed, and the adhesion between the conductors 101a and 102a and the leak L is improved. That is, the contact area between each of the conductors 101a and 102a and the liquid leakage L is increased, so that the conductors 101 and 102 can be easily short-circuited even if the leakage of the liquid is very small. Detection accuracy can be improved.

  So far, the function of the liquid leak detection device 10 according to the present embodiment to detect the leak L has been described. Hereinafter, a more specific structure of the liquid leak detection device 10 will be described with reference to the first embodiment and the second embodiment.

  FIG. 4 is a view showing the structure of the liquid leak detection device 10 in the first embodiment. The liquid leak detection device 10 according to the first embodiment has a structure in which two wire conductors 101 and 102 are spirally wound on the surface of a cylindrical insulator 110.

  As shown to Fig.4 (a-1), the groove | channel for winding the conductors 101 and 102 is provided in the outer surface of the cylindrical insulator 110. As shown in FIG. By winding the conductors 101 and 102 in accordance with such a groove, the displacement of each conductor can be prevented. In addition, the insulator 110 can be hollow inside along the central axis. As a result, the liquid leak detection device 10 can be rotated as the belt of the crimping conveyor 20 advances, and a smooth detection operation can be performed.

  FIG. 4A-2 is a cross-sectional view of the insulator 110 taken along a line A-A in FIG. 4A-1. As shown in FIG. 4 (a-2), the grooves on the outer surface of the insulator 110 are preferably provided in accordance with the shape of the wire-like conductors 101 and 102 to be wound. Thereby, the positions of the wound conductors 101 and 102 can be stabilized. Moreover, since the grooves are provided in a spiral shape, as shown in the cross-sectional view, the grooves are provided to be inclined with respect to the circumferential direction.

  Next, the structure which wound the conductors 101 and 102 around the insulator 110 shown to Fig.4 (a) is demonstrated. FIG. 4 (b-1) is a diagram showing the liquid leak detection device 10 in which the conductors 101 and 102 are wound around the insulator 110. In the present embodiment, the wire-like conductors 101 and 102 have a flat shape in which a part of the cross section is rectangular. By winding the conductors 101 and 102 in such a shape in a spiral shape of the insulator 110, continuous rectangular asperities can be formed on the cross section of the liquid leak detection device 10. Therefore, as described in FIG. 3, the adhesion of the liquid leakage L can be improved.

  FIG. 4: (b-2) is sectional drawing of the liquid leak detection apparatus 10 cut | disconnected by the BB cutting line of FIG. 4 (b-1). As shown in FIG. 4 (b-2), flat conductors 101 and 102 are wound around the outer periphery of the insulator 110. Therefore, the conductors 101 and 102 and the insulator 110 form a cross-sectional shape of continuous rectangular unevenness.

  The conductors 101 and 102 are connected to different electrodes (not shown). The method of connecting each conductor to the electrode is not particularly limited, but any method known to date can be employed. As an example, there is a method in which the wound conductors 101 and 102 are passed through the inside of the insulator 110 and connected from the bottom of the insulator 110. In addition, it is possible to cope with the rotation of the liquid leak detection device 10 by sliding the conductors into contact with the electrodes.

  Up to this point, the liquid leak detection device 10 according to the first embodiment has been described. The liquid leak detection device 10 of the first embodiment can be manufactured by a lightweight structure.

  Next, a second embodiment will be described. The liquid leak detection device 10 according to the second embodiment has a structure in which disk-shaped insulators 110 and disk-shaped conductors 100 are alternately stacked, and the conductors 100 are alternately connected to electrodes of different polarities. FIG. 5 is a view showing the structure of the liquid leak detection device 10 in the second embodiment.

  As shown to Fig.5 (a), the liquid leak detection apparatus 10 of 2nd Example arrange | positions the disk shaped insulator 110 and the disk shaped conductor 100 alternately. When the diameter of the conductor 100 is larger than the diameter of the insulator 110, when the liquid leak detection device 10 is formed, the structure having a rectangular cross-sectional shape can be obtained. Further, by making the inside of the insulator 110 and the conductor 100 hollow along the central axis, it is possible to rotate the liquid leak detection device 10 as in the first embodiment, and smooth detection operation It can be performed.

  Then, as shown in FIG. 5B, the insulator 110 and the conductor 100 are stacked and fixed so that the central axes coincide with each other, thereby forming the liquid leak detection device 10. Moreover, FIG.5 (c) is sectional drawing of the liquid leak detection apparatus 10 cut | disconnected by the AA cutting line of FIG.5 (b). In the present embodiment, since the diameter of the conductor 100 is larger than the diameter of the insulator 110, continuous rectangular irregularities are formed on the cross section of the liquid leak detection device 10 by alternately laminating the insulator 110 and the conductor 100. Can be formed. Therefore, as described in FIG. 3, the adhesion of the liquid leakage L can be improved.

  Each conductor is connected to electrodes of different polarities alternately (not shown) as shown in FIG. 5 (c). Accordingly, the conductors 101a, b, c, d, e are connected to a first electrode (for example, an anode), and the conductors 102a, b, c, d, e are connected to a second electrode (for example, a cathode). The method of connecting each conductor to the electrode is not particularly limited, but any method known to date can be employed. As an example, two holes with different diameters are provided in the conductor 100, and alternately connected to the power source 120 by the rod-like electrodes connected to only the conductors 101a-e and the rod-like electrodes connected to only the conductors 102a-e. Different polarities can be given. Further, as in the first embodiment, the conductors can be made to slide on the electrodes and be brought into contact with each other to cope with the rotation of the liquid leak detection device 10.

  Up to this point, the liquid leak detection device 10 according to the second embodiment has been described. The liquid leak detection device 10 of the second embodiment does not cause loosening of the conductor at the time of rotation, and is also excellent in the heat radiation of the frictional heat due to the rotation caused by the contact with the belt.

  The dimensions and scale of the liquid leak detection device 10 shown in FIGS. 4 and 5 are arbitrary, and can be designed according to the size of the liquid leak inspection system and the liquid to be inspected. Moreover, there is no restriction | limiting in particular also about the material of the conductor 100 which comprises the liquid leak detection apparatus 10 of each Example, and the insulator 110, It can select suitably from various materials. The material of the conductor 100 is, for example, brass, copper, aluminum, stainless steel or the like. The material of the insulator 110 may be, for example, an insulating material such as Teflon (registered trademark), nylon, Delrin (registered trademark), or Bakelite.

  According to the first embodiment and the second embodiment described so far, it is possible to provide the liquid leak detection device 10 in which the detection accuracy of the liquid leakage L is improved. Further, by adopting the liquid leak detection device 10 in the liquid leak inspection system of FIG. 1, the surface of the package 30 is conductive because the liquid leak detection device 10 can be inspected without contacting the package 30. Even if it is possible to detect the leak safely.

  As described above, according to the embodiment described above, it is possible to provide a liquid leak detection device and a liquid leak inspection system with improved detection accuracy of liquid leakage.

  As mentioned above, although the present invention was explained with the embodiment, the present invention is not limited to the above-mentioned embodiment, within the range which those skilled in the art can conceive, as long as the effect and the effect of the present invention are produced, It is included in the scope of the present invention.

10 ... Liquid leak detection device,
20 ... Crimping conveyor,
30 ... packaging body,
40 ... Transport conveyor,
100, 101, 102 ... conductor,
110 ... insulator 120 ... power supply,
130 ... ammeter,
L ... Leakage

JP, 2008-128828, A

Claims (4)

A continuous rectangle formed by an insulator, a first conductor connected to an electrode of a first polarity, and a second conductor connected to an electrode of a second polarity different from the first polarity Have a cross-sectional shape of
The liquid leakage detection device according to claim 1, wherein the recess having the sectional shape has a bottom surface formed by the insulator and a side surface formed by the first conductor and the second conductor. The first conductor and the second conductor are wire-like conductors having a shape in which a part of the cross section is rectangular,
The insulator is cylindrical and
It is formed by spirally winding the first conductor and the second conductor around the periphery of the insulator.
The liquid leak detection device according to claim 1. The insulator, the first conductor, and the second conductor are disk-shaped, and
It is formed by laminating the first conductor and the second conductor via the insulator so that the polarities alternate.
The diameter of the first conductor and the second conductor is larger than the diameter of the insulator,
The liquid leak detection device according to claim 1. A conveyor provided with a belt to which the conveyed object is conveyed, and in the case where there is a liquid leakage that leaks from the conveyed object;
A liquid leakage detection device disposed in contact with the belt and detecting the liquid leakage adhering to the belt, the liquid leakage detection device comprising the liquid according to any one of claims 1 to 3 A leak detection system, a leak detection system.

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