Wiring sheet
The wiring sheet design facilitates easy continuity testing and protection of conductive wires by short-circuiting ends within the roll and using an inspection member, addressing the challenge of inspecting rolled wiring sheets.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- TOPPAN HOLDINGS INC
- Filing Date
- 2022-08-30
- Publication Date
- 2026-05-15
AI Technical Summary
Conventional wiring sheets wound in a roll shape face difficulties in performing continuity inspections due to most regions of the conductive wiring being non-exposed, making visual inspection of fine disconnections challenging and time-consuming.
A wiring sheet design with conductive wires having ends located at the ends of the roll, electrically short-circuited via a short-circuiting member, and connected to an inspection member protruding from the roll, allowing continuity testing while wound, and optionally protected by a laminated protective layer.
Enables easy and efficient continuity testing of conductive wires in a rolled state by checking electrical connections between ends or through an inspection member, while also providing protection to the wiring.
Smart Images
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Abstract
Description
Technical Field
[0004]
[0001] The present invention relates to a wiring sheet in which conductive wiring is formed on a base substrate and wound in a roll shape.
Background Art
[0002] Conventionally, there has been considered a technique for detecting leakage of moisture or oil by forming conductive wiring on a base substrate and short-circuiting, disconnecting, or changing the resistance value of the conductive wiring when moisture or oil adheres thereto. For example, it is disclosed in Patent Document 1.
[0003] In such a technique, in order to widen the sensing area for detecting leakage of moisture or oil, a configuration in which conductive wiring is formed on a long base substrate so as to extend in the longitudinal direction can be considered. A wiring sheet having such a configuration can be easily stored and carried by being wound in a roll shape in the longitudinal direction.
Prior Art Documents
Patent Documents
[0004]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0005] As described above, when a wiring sheet in which conductive wiring is formed on a base substrate is wound in a roll shape, most regions of the conductive wiring are not exposed. Therefore, there is a problem that it becomes difficult to perform a continuity inspection of the conductive wiring after winding it in a roll shape. Although it is conceivable to pull it out from the roll shape and inspect it visually, in that case, it takes time to pull it out from the roll shape and rewind it into a roll shape after the inspection, and it is difficult to visually inspect even a fine disconnection.
[0006] The present invention has been made in view of the problems of the conventional technology described above, and aims to provide a wiring sheet in which conductive wiring is formed on a base material and wound into a roll, and in which the continuity test of the conductive wiring can be easily performed while the wiring is wound into a roll. [Means for solving the problem]
[0007] To achieve the above objective, the present invention provides: A wiring sheet having a base substrate and two conductive wires formed on the base substrate, wound into a roll shape, Each of the two conductive wires has one end located at the end of the rolled wiring sheet, and the other end located at the beginning of the rolled wiring sheet. The wiring sheet has a short-circuiting member laminated in a region on the base substrate that is closer to the winding start end of the wiring sheet than to one end of the two conductive wires, so as to electrically short-circuit the two conductive wires.
[0008] In the present invention configured as described above, one end of each of the two conductive wires formed on the base substrate is located on the end end side of the rolled wiring sheet, and the other end is located on the beginning end side of the rolled wiring sheet. The two conductive wires are electrically short-circuited via a short-circuiting member in the region on the beginning end side of the wiring sheet from the one end of each conductive wire. Therefore, in the rolled state, the continuity test of the conductive wires can be performed by checking the continuity between the two conductive wires located on the end end side of the rolled wiring sheet.
[0009] Furthermore, if the short-circuiting component is laminated on the base substrate so as to electrically short-circuit the other ends of the two conductive wires, a continuity test can be performed on the entire two conductive wires.
[0010] Furthermore, a wiring sheet having a base substrate and conductive wiring formed on the base substrate, which is wound into a roll shape, The conductive wiring has one end located at the end of the rolled wiring sheet, and the other end located at the beginning of the rolled wiring sheet. In the region on the base substrate, an inspection member electrically connected to the conductive wiring is laminated in the region on the winding end side of the wiring sheet closer to one end of the conductive wiring. The inspection member is a wiring sheet, a portion of which protrudes from the side of the rolled wiring sheet that extends in the winding direction.
[0011] In the present invention configured as described above, a conductive wiring formed on a base substrate has one end located on the winding end side of a rolled wiring sheet, and the other end located on the winding start side of a rolled wiring sheet. The area of the conductive wiring closer to the winding start end of the wiring sheet than the one end of the conductive wiring is electrically connected to an inspection member, and a part of the inspection member protrudes from the side of the rolled wiring sheet that extends in the winding direction. Therefore, in the rolled state, the continuity test of the conductive wiring can be performed by checking the conductivity between the one end of the conductive wiring located on the winding end side of the wiring sheet and the part of the inspection member protruding from the side of the rolled wiring sheet.
[0012] Furthermore, if the inspection component is electrically connected to the other end of the conductive wiring and laminated on a base substrate, the continuity test of the entire conductive wiring can be performed.
[0013] Furthermore, if a protective layer is laminated on the base substrate so as to cover at least a portion of the conductive wiring, the conductive wiring will be protected. [Effects of the Invention]
[0014] According to the present invention, in a configuration in which each of two conductive wires formed on a base substrate has one end located on the end end side of the rolled wiring sheet and the other end located on the beginning end side of the rolled wiring sheet, the two conductive wires are electrically short-circuited via a short-circuiting member in the region of the wiring sheet closer to the beginning end side than the one end of the two conductive wires. Therefore, in the rolled state, the continuity test of the conductive wires can be easily performed by checking the continuity between the ends of the two conductive wires located on the end end side of the wiring sheet.
[0015] Furthermore, in a configuration where the short-circuiting component is laminated on a base material so as to electrically short-circuit the other ends of two conductive wires, a continuity test can be performed on the entire two conductive wires.
[0016] Furthermore, according to the present invention, in a configuration in which a conductive wiring formed on a base substrate has one end located on the end end side of a rolled wiring sheet and the other end located on the beginning end side of the rolled wiring sheet, the conductive wiring is electrically connected to an inspection member in the region on the beginning end side of the wiring sheet from the one end of the conductive wiring, and a part of the inspection member protrudes from the side of the rolled wiring sheet that extends in the winding direction. Therefore, in the rolled state, the continuity test of the conductive wiring can be easily performed by checking the conductivity between the one end of the conductive wiring located on the end end side of the wiring sheet and the part of the inspection member protruding from the side of the rolled wiring sheet.
[0017] Furthermore, in cases where the inspection component is electrically connected to the other end of the conductive wiring and laminated on a base substrate, the continuity test of the entire conductive wiring can be performed.
[0018] Furthermore, in cases where a protective layer is laminated on a base substrate so as to cover at least a portion of the conductive wiring, the conductive wiring can be protected.
Brief Description of the Drawings
[0019] [Figure 1] It is a figure which shows the 1st Embodiment of the wiring sheet of this invention, (a) is a external view, (b) is a figure which shows the structure on a base base material. [Figure 2] It is a figure for demonstrating an example of the usage method of the wiring sheet shown in FIG. 1. [Figure 3] It is a figure for demonstrating the continuity inspection method of the conductive wiring in the wiring sheet shown in FIG. 1. [Figure 4] It is a figure which shows the 2nd Embodiment of the wiring sheet of this invention, (a) is a external view, (b) is a figure which shows the structure on a base base material. [Figure 5] It is a figure for demonstrating an example of the usage method of the wiring sheet shown in FIG. 4. [Figure 6] It is a figure for demonstrating the continuity inspection method of the conductive wiring in the wiring sheet shown in FIG. 4.
Embodiments for Carrying Out the Invention
[0020] Below, embodiments of this invention will be described with reference to the drawings.
[0021] (The First Embodiment) 〈Configuration of the Wiring Sheet〉 FIG. 1 is a figure which shows the 1st Embodiment of the wiring sheet of this invention, (a) is a external view, (b) is a figure which shows the structure on a base base material 10.
[0022] As shown in FIG. 1, in this embodiment, the wiring sheet 1 is formed with four conductive wirings 20a to 20d on the base base material 10.
[0023] The base base material 10 is composed of an insulating material such as a film and has a long shape.
[0024] The conductive wirings 20a to 20d are formed on one surface of the base substrate 10 using conductive ink. The conductive wirings 20a to 20d extend parallel to each other from one end to the other in the longitudinal direction of the base substrate 10.
[0025] A protective layer 30 is laminated on the surface of the base substrate 10 on which the conductive wirings 20a to 20d are formed. The protective layer 30 is laminated in an island-like manner at predetermined intervals on the conductive wirings 20a to 20d, so that the protective layer 30 covers a portion of the conductive wirings 20a to 20d on the base substrate 10. The protective layer 30 can be laminated by pattern coating of an insulating material such as resin by printing, so as to cover a portion of the conductive wirings 20a to 20d. By laminating the protective layer 30 on the base substrate 10 so as to cover a portion of the conductive wirings 20a to 20d in this way, the conductive wirings 20a to 20d are protected.
[0026] The wiring sheet 1, configured in this way, is wound in a roll shape around the winding core 40 in the longitudinal direction of the base substrate 10. As a result, one end of the conductive wiring 20a to 20d is located at the winding end 11b of the wiring sheet 1, and the other end is located at the winding start end 11a of the wiring sheet 1.
[0027] A conductive tape 50 is placed near the starting end 11a of the wiring sheet 1. The conductive tape 50 serves as a short-circuiting member in the present invention. The conductive tape 50 is laminated on the surface of the base substrate 10 on which the conductive wirings 20a to 20d are formed, avoiding the protective layer 30 and crossing over the conductive wirings 20a to 20d, and is bonded to the base substrate 10 with a conductive adhesive. As a result, the conductive wirings 20a to 20d are electrically short-circuited by the conductive tape 50 near the starting end 11a of the wiring sheet 1. With this configuration, the conductive tape 50 is laminated in an area where the conductive wirings 20a to 20d are not exposed when the wiring sheet 1 is wound into a roll.
[0028] <How to use wiring sheets> The following describes how to use wiring sheet 1, which is configured as described above.
[0029] Figure 2 is a diagram illustrating an example of how to use the wiring sheet 1 shown in Figure 1.
[0030] The wiring sheet 1 shown in Figure 1 is, for example, attached to a pipe and used to detect moisture leaks from the pipe.
[0031] In that case, first, the wiring sheet 1, which is wound into a roll as shown in Figure 1, is pulled out, and as shown in Figure 2(a), the area in which two conductive wires 20a and 20b are formed from the conductive wires 20a to 20d is cut, and then it is cut to a length corresponding to the area in which moisture leakage in the piping is to be detected. When used to detect moisture leakage from a piping, as will be described later, moisture leakage from the piping is detected by whether or not the two conductive wires 20a and 20b are short-circuited by moisture, so it is conceivable to first cut the area in which two conductive wires 20a and 20b are formed from the conductive wires 20a to 20d, rewind it into a roll, and then cut it to a length corresponding to the area in which moisture leakage in the piping is to be detected when actually using it. Even in that case, when rewinding the cut area of the wiring sheet 1 into a roll, the conductive tape 50 will be layered so as to cross over the conductive wires 20a and 20b, avoiding the protective layer 30, near the beginning end of the roll.
[0032] Subsequently, as shown in Figure 2(b), the connector 4 is connected so as to electrically connect to one end of the conductive wirings 20a and 20b. The connector 4 has a terminal (not shown) that electrically connects to the conductive wirings 20a and 20b when one end of the long-length base material 10 is abutted against it. By abutting one end of the long-length base material 10 against the connector 4, one end of the conductive wirings 20a and 20b can be electrically connected to the connector 4. The RFID tag 8 is connected to the connector 4 via cables 6a and 6b. Since the terminal of the connector 4 that electrically connects to the conductive wirings 20a and 20b is electrically connected to cables 6a and 6b, electrically connecting one end of the conductive wirings 20a and 20b to the connector 4 results in the conductive wirings 20a and 20b being electrically connected to the RFID tag 8 via the connector 4 and cables 6a and 6b.
[0033] In this manner, a wiring sheet 1, in which conductive wires 20a and 20b are electrically connected to the RFID tag 8 via connection connector 4 and cables 6a and 6b, is attached to the piping, and the continuity between the two conductive wires 20a and 20b is inspected. Specifically, power is supplied to the RFID tag 8 from an inspection device 5 capable of contactless communication with the RFID tag 8, thereby supplying current from the RFID tag 8 to the conductive wires 20a and 20b via cables 6a and 6b and connection connector 4 to detect the resistance value. If there is no moisture leakage in the piping, there is no continuity between the two conductive wires 20a and 20b, and therefore, even if current is supplied from the inspection device 5 to the conductive wires 20a and 20b via the RFID tag 8, no current flows through the conductive wires 20a and 20b, and as a result, the resistance value detected by the inspection device 5 via the RFID tag 8 is almost infinite.
[0034] On the other hand, if moisture leaks in the piping, the two conductive wires 20a and 20b become electrically conductive due to the moisture. As a result, when current is supplied from the inspection device 5 to the conductive wires 20a and 20b via the RFID tag 8, current flows through the conductive wires 20a and 20b, and the inspection device 5 detects a certain resistance value via the RFID tag 8.
[0035] In the inspection device 5, it is determined whether or not there is a water leak in the piping based on the resistance value detected via the RFID tag 8 in this manner.
[0036] Alternatively, instead of connecting the conductive wirings 20a and 20b to the RFID tag 8 via the connector 4 and cables 6a and 6b, and detecting the resistance value via the RFID tag 8 in the inspection device 5, the conductive wirings 20a and 20b may be directly connected to the inspection device 5 via the connector 4 and cables 6a and 6b, and the resistance value may be detected in the inspection device 5.
[0037] <Method for testing the continuity of conductive wiring 20a to 20d> The following describes a method for testing the continuity of conductive wires 20a to 20d in the wiring sheet 1 configured as described above.
[0038] Figure 3 is a diagram illustrating the method for testing the continuity of conductive wires 20a to 20d in the wiring sheet 1 shown in Figure 1.
[0039] In the wiring sheet 1 shown in Figure 1, as described above, the conductive tape 50 is placed near the starting end 11a of the wiring sheet 1, so that the conductive wires 20a to 20d are electrically short-circuited by the conductive tape 50 near the starting end 11a of the wiring sheet 1.
[0040] Therefore, in order to perform a continuity test on each of the conductive wirings 20a to 20d, as shown in Figure 3, first, the measuring instrument 2 is connected via cables 3a and 3b to one end of conductive wirings 20a and 20b located at the winding end 11b of the wiring sheet 1, and the continuity test of conductive wirings 20a and 20b is performed. If continuity is detected, it is confirmed that no breaks have occurred in either conductive wiring 20a or 20b. Similarly, the measuring instrument 2 is connected via cables 3a and 3b to one end of conductive wirings 20c and 20d located at the winding end 11b of the wiring sheet 1, and the continuity test of conductive wirings 20c and 20d is performed. If continuity is detected, it is confirmed that no breaks have occurred in either conductive wiring 20c or 20d.
[0041] This makes it possible to confirm that no breaks have occurred in any of the conductive wirings 20a to 20d formed on the base substrate 10.
[0042] On the other hand, if the continuity test performed on the conductive wirings 20a and 20b as described above does not detect continuity, it means that at least one of the conductive wirings 20a and 20b is broken. In that case, in order to identify which conductive wiring 20a and 20b is broken, the first step is to find the conductive wiring that is not broken.
[0043] In this embodiment, four conductive wires 20a to 20d are formed on the base substrate 10. First, the measuring instrument 2 is connected via cables 3a and 3b to one end of the conductive wires 20c and 20d located at the winding end 11b of the wiring sheet 1, and a continuity test of the conductive wires 20c and 20d is performed. If the continuity state of the conductive wires 20c and 20d is detected, it is confirmed that no breaks have occurred in any of the conductive wires 20c and 20d.
[0044] Therefore, the next step is to connect the measuring instrument 2 to one end of the conductive wiring 20a, 20c or conductive wiring 20a, 20d located at the winding end 11b of the wiring sheet 1 via cables 3a, 3b, and perform a continuity test on the conductive wiring 20a, 20c or conductive wiring 20a, 20d. If continuity is detected in the conductive wiring 20a, 20c or conductive wiring 20a, 20d, it is confirmed that there is no break in the conductive wiring 20a. On the other hand, if continuity is not detected in the conductive wiring 20a, 20c or conductive wiring 20a, 20d, it is confirmed that there is a break in the conductive wiring 20a.
[0045] Similarly, measuring instruments 2 are connected via cables 3a and 3b to one end of conductive wiring 20b, 20c or conductive wiring 20b, 20d located at the winding end 11b of the wiring sheet 1, and a continuity test is performed on conductive wiring 20b, 20c or conductive wiring 20b, 20d. If continuity is detected in conductive wiring 20b, 20c or conductive wiring 20b, 20d, it is confirmed that there is no break in conductive wiring 20b. On the other hand, if continuity is not detected in conductive wiring 20b, 20c or conductive wiring 20b, 20d, it is confirmed that there is a break in conductive wiring 20b.
[0046] Furthermore, if, as described above, the continuity test of conductive wirings 20a and 20b does not detect continuity, and the continuity test of conductive wirings 20c and 20d also does not detect continuity, then first, the measuring instrument 2 is connected via cables 3a and 3b to one end of conductive wirings 20a and 20c located at the winding end 11b of the wiring sheet 1, and the continuity test of conductive wirings 20a and 20c is performed. If continuity is detected in conductive wirings 20a and 20c, it is confirmed that there is no break in either conductive wiring 20a or 20c, but that there is a break in conductive wiring 20b or 20d.
[0047] Furthermore, if continuity is not detected in conductive wirings 20a and 20c, the measuring instrument 2 is connected via cables 3a and 3b to one end of conductive wirings 20b and 20d located at the winding end 11b of the wiring sheet 1, and a continuity test of conductive wirings 20b and 20d is performed. If continuity is detected in conductive wirings 20b and 20d, it is confirmed that no break has occurred in either conductive wiring 20b or 20d, and that a break has occurred in conductive wirings 20a and 20c.
[0048] Furthermore, if continuity is not detected in conductive wirings 20b and 20d, the measuring instrument 2 is connected via cables 3a and 3b to one end of conductive wirings 20a and 20d located at the winding end 11b of the wiring sheet 1, and a continuity test of conductive wirings 20a and 20d is performed. If continuity is detected in conductive wirings 20a and 20d, it is confirmed that no break has occurred in either conductive wiring 20a or 20d, and that a break has occurred in conductive wirings 20b and 20c.
[0049] Furthermore, if continuity is not detected in conductive wirings 20a and 20d, the measuring instrument 2 is connected via cables 3a and 3b to one end of conductive wirings 20b and 20c located at the winding end 11b of the wiring sheet 1, and a continuity test of conductive wirings 20b and 20c is performed. If continuity is detected in conductive wirings 20b and 20c, it is confirmed that no break has occurred in either conductive wiring 20b or 20c, and that a break has occurred in conductive wirings 20a and 20d.
[0050] Furthermore, if continuity is not detected in conductive wirings 20b and 20c, it is confirmed that a break has occurred in all conductive wirings 20a to 20d.
[0051] In this manner, if continuity testing is performed on two of the four conductive wires 20a to 20d and continuity cannot be confirmed, the conductive wire that is not broken can be identified first. Then, by performing continuity testing on the non-broken conductive wire and the conductive wire whose continuity status is to be checked, the conductive wire that is broken can be identified.
[0052] As described above, in this embodiment, the conductive wirings 20a to 20d formed on the base substrate 10 are electrically short-circuited via the conductive tape 50 in areas where the conductive wirings 20a to 20d are not exposed when the base substrate 10 is wound into a roll. Therefore, in the rolled state, the continuity test of the conductive wirings 20a to 20d can be performed by checking the continuity between two of the conductive wirings 20a to 20d located at the end 11b of the winding end of the wiring sheet 1.
[0053] Furthermore, even if the area where the two conductive wires 20a and 20b used for detecting moisture leaks from the piping are formed is cut and re-wound into a roll, by layering the conductive tape 50 across the conductive wires 20a and 20b near the beginning end of the roll, avoiding the protective layer 30, the conductive wires 20a and 20b are short-circuited via the conductive tape 50 near the beginning end of the winding sheet 1. Therefore, a continuity test of the conductive wires 20a and 20b can be performed by connecting the measuring instrument 2 via cables 3a and 3b to one end of the conductive wires 20a and 20b located at the end of the winding sheet 1.
[0054] Furthermore, in this embodiment, conductive tape 50 is laminated and adhered to the base substrate 10 near the starting end 11a of the wiring sheet 1, causing the conductive wires 20a to 20d to be electrically short-circuited with each other. However, if the conductive tape 50 is laminated and adhered to the starting end 11a of the wiring sheet 1, the conductive wires 20a to 20d will be electrically short-circuited between the ends located on the starting end 11a side of the wiring sheet 1, thereby enabling a continuity test of the entire conductive wires to be inspected.
[0055] Furthermore, although this embodiment was described using a configuration in which four conductive wires 20a to 20d are formed on the base substrate 10 as an example, as long as at least two conductive wires are formed on the base substrate 10, a continuity test can be performed by connecting cables 3a and 3b as described above, and any number of wires other than two can be formed.
[0056] Furthermore, in this embodiment, the conductive tape 50 is bonded to the base substrate 10 with a conductive adhesive. However, at the winding start end 11a side of the wiring sheet 1 for the conductive wirings 20a to 20d, the conductive wirings 20a to 20d may be formed so that they are electrically connected to each other, and the conductive wiring itself may perform the role of the short-circuiting member described above.
[0057] (Second Embodiment) <Wiring sheet configuration> Figure 4 shows a second embodiment of the wiring sheet of the present invention, where (a) is an external view and (b) is a diagram showing the configuration on the base substrate 10.
[0058] As shown in Figure 4, this embodiment is a wiring sheet 101 in which the shape of the conductive tape 150 is different from that shown in Figure 1.
[0059] In this embodiment, the conductive tape 150 serves as an inspection member in the present invention. The conductive tape 150 is laminated on the surface of the base substrate 10 on which the conductive wirings 20a to 20d are formed, avoiding the protective layer 30 and crossing over the conductive wirings 20a to 20d, and is bonded to the base substrate 10 with a conductive adhesive. As a result, the conductive tape 150 is electrically connected to the conductive wirings 20a to 20d near the winding start end 11a of the wiring sheet 101. With this configuration, the conductive tape 150 is laminated in an area where the conductive wirings 20a to 20d are not exposed when the wiring sheet 101 is wound into a roll. In addition, a portion of the conductive tape 150 in this embodiment protrudes from the side edge of the winding direction of the winding of the winding sheet 101.
[0060] <How to use wiring sheets> The following describes how to use the wiring sheet 101 configured as described above.
[0061] Figure 5 is a diagram illustrating an example of how to use the wiring sheet 101 shown in Figure 4.
[0062] The wiring sheet 101 shown in Figure 4 is, for example, attached to a pipe and used to detect oil leaks from the pipe.
[0063] In that case as well, the wiring sheet 101 wound into a roll as shown in Figure 4 is pulled out, and the area in which two conductive wires 20a and 20b are formed from the conductive wires 20a to 20d is cut, similar to the case shown in Figure 2(a), and then it is cut to a length corresponding to the range for detecting oil leakage in the piping. In this case as well, it is conceivable to first cut the area in which two conductive wires 20a and 20b are formed from the conductive wires 20a to 20d and then wind it into a roll again, and then cut it to a length corresponding to the range for detecting moisture leakage in the piping when actually using it. At that time, when winding the cut area of the wiring sheet 1 into a roll again, the conductive tape 150 will be laminated near the beginning end of the winding, crossing over the conductive wires 20a and 20b while avoiding the protective layer 30, and protruding from the side edge extending in the winding direction of the wiring sheet 101.
[0064] Subsequently, as shown in Figure 5(a), a connection connector 4 is connected to one end of the conductive wirings 20a and 20b so as to be electrically connected, and a connection member 7 is connected to the other end of the conductive wirings 20a and 20b. The connection member 7 has two connection terminals at both ends of a single wire, and the ends of the conductive wirings 20a and 20b are connected to these two connection terminals, respectively, so that the conductive wirings 20a and 20b are electrically connected. The connection connector 4 has a terminal (not shown) that is electrically connected to the conductive wirings 20a and 20b when one end of the long-length base material 10 is abutted against the connection connector 4, so that one end of the conductive wirings 20a and 20b is electrically connected to the connection connector 4 by abutting one end of the long-length base material 10 against the connection connector 4. RFID tags 8 are connected to the connection connector 4 via cables 6a and 6b. Since cables 6a and 6b are electrically connected to terminals that are electrically connected to conductive wiring 20a and 20b, by electrically connecting one end of conductive wiring 20a and 20b to the connector 4, conductive wiring 20a and 20b will be electrically connected to the RFID tag 8 via the connector 4 and cables 6a and 6b.
[0065] In this way, the conductive wires 20a and 20b are electrically connected to each other via the connecting member 7 to form a single conductive wire. The wiring sheet 101, to which the conductive wires 20a and 20b are electrically connected to the RFID tag 8 via the connecting connector 4 and cables 6a and 6b, is then attached to the piping, and the continuity state of the two conductive wires 20a and 20b is inspected. Specifically, power is supplied to the RFID tag 8 from the inspection device 5, which is capable of contactless communication with the RFID tag 8, and current is supplied from the RFID tag 8 to the conductive wires 20a and 20b via cables 6a and 6b and the connecting connector 4 to detect the resistance value. If there is no oil leakage in the piping, the two conductive wires 20a and 20b are electrically connected via the connecting member 7. Therefore, when current is supplied from the inspection device 5 to the conductive wiring 20a and 20b via the RFID tag 8, current flows through the conductive wiring 20a and 20b, and as a result, the combined resistance value of the conductive wiring 20a and 20b, the connecting member 7, and the cables 6a and 6b is detected by the inspection device 5 via the RFID tag 8.
[0066] On the other hand, if an oil leak occurs in the piping, the conductive wiring 20a and 20b will break due to the oil. As a result, even if current is supplied from the inspection device 5 to the conductive wiring 20a and 20b via the RFID tag 8, no current will flow through the conductive wiring 20a and 20b, and the resistance value detected by the inspection device 5 via the RFID tag 8 will be almost infinite.
[0067] Furthermore, as mentioned above, when used to detect oil leaks from piping, since the oil leak from the piping is detected by whether the conductive wires 20a and 20b are broken by oil, as shown in Figure 5(b), the wire sheet 101 wound into a roll as shown in Figure 4 may be pulled out, the region in which one of the conductive wires 20a to 20d is formed may be cut, and then it may be cut to a length corresponding to the range in which oil leaks in the piping are to be detected, and the inspection device 5 may be connected to both ends of the conductive wire 20a via cables 6a and 6b. In this case as well, it is conceivable to first cut the region in which one of the conductive wires 20a to 20d is formed, wind it into a roll again, and then cut it to a length corresponding to the range in which moisture leaks in the piping are to be detected when actually using it. Furthermore, when the cut portion of the wiring sheet 101 is rolled up again, a conductive tape 150 is laminated near the beginning end of the roll, avoiding the protective layer 30, connecting to the conductive wiring 20a, and protruding from the side of the wiring sheet 101 that extends in the winding direction.
[0068] Then, by supplying power from the inspection device 5 to the RFID tag 8, current is supplied from the RFID tag 8 to the conductive wirings 20a and 20b via cables 6a and 6b and connection connector 4, and the resistance value is detected. If there is no oil leakage in the piping, the conductive wiring 20a is not broken, so when current is supplied from the inspection device 5 to the conductive wiring 20a via the RFID tag 8, current flows through the conductive wiring 20a, and as a result, the combined resistance value of the conductive wiring 20a and cables 6a and 6b is detected by the inspection device 5 via the RFID tag 8.
[0069] On the other hand, if an oil leak occurs in the piping, the conductive wiring 20a will break due to the oil, and as a result, even if current is supplied from the inspection device 5 to the conductive wiring 20a via the RFID tag 8, no current will flow through the conductive wiring 20a, and the resistance value detected by the inspection device 5 via the RFID tag 8 will be almost infinite.
[0070] In the inspection device 5, it is determined whether or not there is an oil leak in the piping based on the resistance value detected via the RFID tag 8 in this manner. Alternatively, instead of a configuration in which the conductive wiring is disconnected when an oil leak occurs, a configuration in which the resistance value changes may be used to determine whether or not there is an oil leak. In that case as well, as shown in Figures 5(a) and (b), the RFID tag 8 is connected to the conductive wirings 20a and 20b, and the resistance value is detected by supplying current to the conductive wirings 20a and 20b via the RFID tag 8 from the inspection device 5, which is capable of contactless communication with the RFID tag 8, and based on the detected resistance value, it is determined whether or not there is an oil leak in the piping.
[0071] <Method for testing the continuity of conductive wiring 20a to 20d> The following describes a method for testing the continuity of conductive wires 20a to 20d in the wiring sheet 101 configured as described above.
[0072] Figure 6 is a diagram illustrating the method for testing the continuity of conductive wires 20a to 20d in the wiring sheet 101 shown in Figure 4.
[0073] In the wiring sheet 101 shown in Figure 4, as described above, the conductive tape 150 is placed near the winding start end 11a of the wiring sheet 101, so that the conductive wires 20a to 20d are electrically connected to the conductive tape 150 near the winding start end 11a of the wiring sheet 101. In addition, a portion of the conductive tape 150 protrudes from the side of the winding direction of the rolled wiring sheet 101.
[0074] Therefore, in order to perform a continuity test on each of the conductive wirings 20a to 20d, as shown in Figure 6, first, the measuring instrument 2 is connected via cable 3a to one end of conductive wiring 20a located at the winding end 11b of the wiring sheet 101, and the measuring instrument 2 is also connected via cable 3b to the portion of the conductive tape 150 that protrudes from the side of the wiring sheet 101, and the continuity test of conductive wiring 20a is performed. If continuity is detected, it is confirmed that there is no break in the conductive wiring 20a. Similarly, for conductive wirings 20b to 20d, the measuring instrument 2 is connected via cable 3a to one end of conductive wiring 20b to 20d located at the winding end 11b of the wiring sheet 101, and the measuring instrument 2 is also connected via cable 3b to the portion of the conductive tape 150 that protrudes from the side of the wiring sheet 101, and the continuity test of conductive wirings 20b to 20d is performed. If continuity is detected, it is confirmed that there is no break in the conductive wirings 20b to 20d.
[0075] On the other hand, if, as described above, no continuity is detected in each of the conductive wires 20a to 20d after performing a continuity test, it is confirmed that a break has occurred in the conductive wires 20a to 20d where no continuity was detected.
[0076] As described above, in this embodiment, the conductive wirings 20a to 20d formed on the base substrate 10 are electrically connected to the conductive tape 150 in areas where the conductive wirings 20a to 20d are not exposed when the base substrate 10 is wound into a roll. Since a portion of the conductive tape 150 protrudes from the side of the winding direction of the rolled wiring sheet 101, the continuity of the conductive wirings 20a to 20d can be checked by inspecting the continuity between one end of the conductive wirings 20a to 20d located at the winding end 11b of the wiring sheet 101 and the portion of the conductive tape 150 protruding from the side of the rolled wiring sheet 101. Furthermore, the fact that a portion of the conductive tape 150 protrudes from the side of the winding direction of the wiring sheet 101 has the advantage of making it easy to see where the conductive tape 150 is located on the wiring sheet 101.
[0077] Furthermore, even if the area where one or two conductive wires 20a, 20b used for detecting oil leaks from the piping are formed is cut and re-wound into a roll, by laminating the conductive tape 150 so as to cross over the conductive wires 20a, 20b while avoiding the protective layer 30 near the beginning end of the roll, the conductive wires 20a, 20b will be electrically connected to the conductive tape 150 at the beginning end of the wiring sheet 101. Therefore, the measuring instrument 2 can be connected via cable 3a to one end of the conductive wires 20a, 20b located at the end end 11b of the wiring sheet 101, and the measuring instrument 2 can be connected via cable 3b to the portion of the conductive tape 150 that protrudes from the side of the wiring sheet 101, allowing for a continuity test of the conductive wires 20a, 20b.
[0078] In this embodiment, the conductive tape 150 is laminated and bonded to the base substrate 10 near the starting end 11a of the wiring sheet 101, thereby electrically connecting the conductive tape 150 and the conductive wirings 20a to 20d. However, if the conductive tape 150 is laminated and bonded to the starting end 11a of the wiring sheet 101, the conductive wirings 20a to 20d will be electrically connected to the conductive tape 150 at the end located on the starting end 11a side of the wiring sheet 101, thereby enabling a continuity test of the entire conductive wiring to be inspected.
[0079] Furthermore, in this embodiment, the conductive tape 150 is bonded to the base substrate 10 with a conductive adhesive. However, the above-mentioned inspection member may be constructed by forming conductive wiring such that the conductive wirings 20a to 20d are electrically connected to each other at the winding start end 11a side of the wiring sheet 101, attaching a conductive member to this conductive wiring, and having a part of this conductive member protrude from the side edge extending in the winding direction of the wiring sheet 101.
[0080] Furthermore, in the above-described embodiment, the conductive tapes 50 and 150 are laminated near the winding start end 11a of the wiring sheet 1,101. However, the conductive tapes 50 and 150 do not need to be near the winding start end 11a of the wiring sheet 1,101. They can be laminated in any region where the conductive wiring 20a to 20d is not exposed due to the wiring sheet 1,101 being wound into a roll. Alternatively, the conductive tapes 50 and 150 may be attached to the winding core 40.
[0081] Furthermore, in the above-described embodiment, the conductive tapes 50 and 150 are bonded to the base substrate 10 with a conductive adhesive. However, when the wiring sheet 1,101 is wound into a roll, pressure is applied to the conductive tapes 50 and 150 laminated on the base substrate 10 due to the winding, and they become electrically connected to the conductive wirings 20a to 20d. Therefore, the conductive tapes 50 and 150 may not be bonded to the base substrate 10 with a conductive adhesive. However, the configuration in which the conductive tapes 50 and 150 are bonded to the base substrate 10 with a conductive adhesive improves the reliability of the connection between the conductive tapes 50 and 150 and the conductive wirings 20a to 20d.
[0082] Furthermore, in the above-described embodiment, the conductive wirings 20a to 20d extend parallel to each other from one end to the other end in the longitudinal direction of the base substrate 10, so that one end is located at the winding end 11b of the wiring sheet 1,101 and the other end is located at the winding start end 11a of the wiring sheet 1,101. However, if one end of the conductive wirings 20a to 20d is located on the winding end 11b side of the wiring sheet 1,101 and the other end of the conductive wirings 20a to 20d is located on the winding start end 11a side of the wiring sheet 1,101, then it is not necessary for one end of the conductive wirings 20a to 20d to be located at the winding end 11b of the wiring sheet 1,101 and the other end of the conductive wirings 20a to 20d to be located at the winding start end 11a of the wiring sheet 1,101. For example, in order to protect the conductive wirings 20a to 20d when the wiring sheet 1,101 is wound into a roll, it is conceivable that conductive wirings 20a to 20d may not be formed in the area near the end 11b of the end sheet 1,101. Even in that case, if one end of the conductive wirings 20a to 20d located on the end 11b side of the end sheet 1,101 is exposed, cables 3a and 3b can be connected to this end as described above. Furthermore, even if one end of the conductive wirings 20a to 20d located on the end 11b side of the end sheet 1,101 is not exposed, a continuity test can be performed by simply pulling out the wiring sheet 1,101 so that only that end of the conductive wirings 20a to 20d is exposed, and then connecting cables 3a and 3b as described above.
[0083] Furthermore, in the above-described embodiment, the protective layer 30 is laminated on the base substrate 10 so as to cover a portion of the conductive wirings 20a to 20d. However, if the protective layer 30 has a perforated structure, it may be laminated so as to cover all of the conductive wirings 20a to 20d. Also, although the conductive wirings 20a to 20d can be protected by laminating the protective layer 30 so as to cover them, a configuration without the protective layer 30 is also conceivable. [Explanation of Symbols]
[0084] 1,101 Wiring Sheet 2 Measuring Instruments 3a, 3b, 6a, 6b cable 4 connection connectors 5. Inspection equipment 7. Connecting Members 8 RFID tags 10 Base material 11a Starting end of winding 11b End of winding 20a~20d Conductive Wiring 30 protective layer 40 cores 50,150 Conductive Tape
Claims
1. A wiring sheet having a base substrate and two conductive wires formed on the base substrate, wound into a roll shape, Each of the two conductive wires has one end located at the end of the rolled wiring sheet, and the other end located at the beginning of the rolled wiring sheet. A wiring sheet in which a short-circuiting member is laminated in a region on the base substrate, in a region on the winding end of the wiring sheet that is closer to one end of the two conductive wires than the winding end of the two conductive wires, so as to electrically short-circuit the two conductive wires.
2. In the wiring sheet according to claim 1, The short-circuiting member is a wiring sheet laminated on the base substrate so as to electrically short-circuit the other ends of the two conductive wires.
3. A wiring sheet having a base substrate and conductive wiring formed on the base substrate, wound into a roll shape, The conductive wiring has one end located towards the end of the rolled wiring sheet, and the other end located towards the beginning of the rolled wiring sheet. In the region on the base substrate, an inspection member electrically connected to the conductive wiring is laminated in the region on the winding end side of the wiring sheet closer to one end of the conductive wiring. The inspection member is a wiring sheet, the latter having a portion of which protrudes from the side of the rolled wiring sheet extending in the winding direction.
4. In the wiring sheet according to claim 3, The inspection member is a wiring sheet that is electrically connected to the other end of the conductive wiring and laminated on the base substrate.
5. In the wiring sheet according to any one of claims 1 to 4, A wiring sheet having a protective layer laminated on the base substrate so as to cover at least a portion of the conductive wiring.