JP2010287126A - Window glass breakage sensor, film for the same, and method for producing the film for window glass breakage sensor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a window glass breakage sensor and a film for the same, that reliably detect window glass breakage, and to provide a method for producing the film for the window glass breakage sensor. <P>SOLUTION: The film 30 for the window glass breakage sensor detecting the breakage of a glass plate 13 of a window for an automobile is stuck onto the glass plate 13. The film 30 for the window glass breakage sensor includes: an electroconductive layer 33 patterned so as to linearly extend by printing; and an adhesive layer 31 formed by printing, for sticking the electroconductive layer 33 onto the glass plate 13. The window glass breakage sensor detects the breakage of the glass plate 13 by a resistance change or wire breakage of the electroconductive layer 33. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a window glass break sensor, a window glass break sensor film, and a method for manufacturing a window glass break sensor film.

  Patent Document 1 discloses a conductor wiring film, which can be applied to adherends of various sizes, can maintain the aesthetic appearance of the adherend, It can detect the destruction of the adherend, defrost, and stop fogging. Specifically, the conductor wiring film has a resin film having an adhesive layer on one main surface, a linear portion and a curved portion, the linear portions are located substantially in parallel, and the curved portion is A conductor which is arranged on the adhesive layer in a substantially S shape so as to be continuously located via the straight portion, and is one of two curved portion rows formed by a plurality of curved portions. The connection terminal is connected to the curved portion of the conductor in the curved portion row. The outer diameter of the conductor is preferably 10 to 100 μm.

Japanese Patent Laid-Open No. 9-16860

  However, broken glass cannot be detected unless the glass falls apart. In other words, since the conductor for detecting window glass breakage is a metal wire having a uniform density of 10 μm or more in diameter, it stretches well, and therefore breakage is not detected by minute cracks, so window window breakage cannot be detected (as a window glass breakage sensor). Is low sensitivity). In other words, since it cannot be detected unless the glass is separated (because the detection accuracy is low), it is necessary to increase the area in order to improve the detection accuracy. Further, since the metal wire is laid out, the production cost increases.

  The present invention has been made in view of the above problems, and its object is to provide a window glass break sensor, a window glass break sensor film, and a window glass break sensor that can reliably detect window glass breaks. Another object of the present invention is to provide a method for manufacturing a film for use.

  The invention according to claim 1 is a sensor for detecting breakage of a glass plate of a window, and is for attaching a conductive layer patterned by printing on a surface of the glass plate and the conductive layer to the glass plate. An adhesive layer and detecting breakage of the glass plate by disconnection or resistance change of the conductive layer.

  According to a second aspect of the present invention, there is provided a window glass breakage sensor film that is affixed to a glass plate of a window, wherein the film is patterned on the base film for supporting a printed matter, and is disconnected or resisted. The gist is provided with a conductive layer for detecting breakage of the glass plate due to a change, and an adhesive layer formed by printing on the base film and affixing the conductive layer to the glass plate. .

  According to invention of Claim 1, 2, it has a conductive layer and a contact bonding layer, a conductive layer is patterned by printing, a contact bonding layer is formed by printing, and affixes a conductive layer on a glass plate. And the breakage of the glass plate of a window is detected by the disconnection of a conductive layer, or resistance change. Therefore, the conductor is formed by printing without depending on the wiring, and it is possible to reliably detect breakage of the window glass.

  According to a third aspect of the present invention, there is provided a conductive layer patterning step of patterning a conductive layer for detecting breakage of a glass plate of a window due to disconnection or resistance change by printing on a printed film supporting base film, and the printed film supporting base film. An adhesive layer forming step of forming an adhesive layer on the conductive layer by printing.

According to invention of Claim 3, the film for window glass breakage sensors of Claim 2 can be manufactured.
According to a fourth aspect of the present invention, in the window glass break sensor according to the first aspect, the conductive layer extends in a direction perpendicular to a direction of a crack generated when the glass plate is broken or a direction in which the crack extends. It is good to have.

  As described in claim 5, in the window glass break sensor according to claim 1, when the conductive layer extends in a spiral shape, the conductive layer exhibits a disconnection or a resistance change with respect to cracks and cracks in all directions. Can occur.

  The window glass break sensor according to claim 1, further comprising an insulating layer formed between the adhesive layer and the conductive layer, wherein the insulating layer is formed on the conductive layer. When patterning is performed so as to extend in a direction orthogonal to the extending direction, the distortion caused by the breakage of the glass plate is amplified, and breakage of the window glass can be detected with high sensitivity.

  As described in claim 7, in the window glass break sensor according to any one of claims 1, 4 to 6, when the conductive layer has irregularities formed on the surface thereof, the glass plate is broken. As a result, the window glass breakage can be detected with high sensitivity.

As described in claim 8, in the window glass break sensor according to any one of claims 1, 4 to 7, the adhesive layer and the conductive layer may be laminated and printed directly on the glass plate. .
As described in claim 9, in the window glass break sensor according to any one of claims 1, 4 to 8, the conductive layer is configured by electrically connecting metal particles by direct welding. Can do.

As described in claim 10, in the window glass break sensor according to any one of claims 1, 4 to 9, a double-sided tape or a thermosetting adhesive may be used as the adhesive layer.
As described in claim 11, in the window glass breakage sensor film according to claim 2, when the conductive layer extends in a spiral shape, the wire breaks or resists against cracks and cracks in all directions. Changes can occur.

  The window glass breakage sensor film according to claim 2, further comprising an insulating layer formed between the adhesive layer and the conductive layer, wherein the insulating layer is the conductive layer. When patterning is performed so as to extend in a direction orthogonal to the extending direction of the layer, distortion due to breakage of the glass plate is amplified, and breakage of the window glass can be detected with high sensitivity.

  The window glass breakage sensor film according to any one of claims 2, 11, and 12 according to claim 13, wherein the conductive layer has a glass plate when irregularities are formed on the surface thereof. The distortion caused by the breakage of the window is amplified and the breakage of the window glass can be detected with high sensitivity.

  The window glass breakage sensor film according to any one of claims 2 and 11 to 13, wherein the conductive layer is formed by electrically connecting metal particles by direct welding. can do.

  As described in claim 15, in the window glass breakage sensor film according to any one of claims 2, 11 to 14, when the base film is peeled off after being attached to a glass plate, It can be set as a sensitive window glass breakage sensor.

  According to a sixteenth aspect of the present invention, in the method for manufacturing a window glass breakage sensor film according to the third aspect, the conductive layer may be formed using a printing ink containing at least organometallic particles.

As described in claim 17, in the method for manufacturing a window glass breakage sensor film according to claim 16, organic silver particles may be used as the organic metal particles.
As described in claim 18, in the window glass break sensor according to any one of claims 1, 4 to 10, the window may be an automobile window.

As described in claim 19, in the window glass breakage sensor film according to any one of claims 2, 11 to 15, the window may be an automobile window.
In the method for manufacturing a window glass breakage sensor film according to any one of claims 3, 16, and 17, the window may be an automobile window.

  According to the present invention, it is possible to reliably detect window glass breakage.

(A) is a schematic perspective view which shows the rear part of the passenger car in this embodiment, (b) is a fragmentary sectional view of the triangular window vicinity of the left side corresponding to the AA line of (a). The figure which shows the plane and cross section of the film for window glass breakage sensors in 1st Embodiment. The electrical block diagram of a window glass breakage sensor. Sectional drawing of the film for window glass breakage sensors in the BB line of FIG. (A)-(e) is sectional drawing which shows the manufacturing process of a film. (A), (b) is sectional drawing for demonstrating the mounting process to the glass plate of a film. Sectional drawing of the film for window glass breakage sensors. Sectional drawing of the film for window glass breakage | damage sensors of the modification of 1st Embodiment. Sectional drawing of the film for window glass breakage sensors in 2nd Embodiment. Sectional drawing of the film for window glass breakage sensors in 2nd Embodiment. Sectional drawing of the film for window glass breakage | damage sensors of the modification of 2nd Embodiment. Sectional drawing of the film for window glass breakage sensors in 3rd Embodiment. Sectional drawing of the film for window glass breakage sensors in 3rd Embodiment. The top view of the film for window glass breakage | shortage sensors in 4th Embodiment. The top view of the film for window glass breakage sensors of the modification of 4th Embodiment. The top view of the film for window glass breakage sensors in a 5th embodiment. Sectional drawing of the film for window glass breakage sensors in the CC line | wire of FIG. Sectional drawing of the film for window glass breakage sensors in 5th Embodiment. Sectional drawing of the film for window glass breakage sensors. The top view of the film for window glass breakage sensors of the modification of 5th Embodiment. Sectional drawing of the film for window glass breakage sensors in 6th Embodiment. The top view of the film for window glass breakage sensors in 6th Embodiment. (A)-(f) is a conceptual diagram of the conductive layer for demonstrating 7th Embodiment. (A)-(c) is a conceptual diagram of the conductive layer for demonstrating 7th Embodiment. (A)-(f) is sectional drawing of the film for window glass breakage | damage sensors for demonstrating 7th Embodiment.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
As shown to Fig.1 (a), the triangular window 12 as a window for motor vehicles is provided in the rear part of the vehicle 11 on both right-and-left sides (only the left side is shown). The triangular window 12 is a window that cannot be opened and closed. Moreover, in the triangular window 12, the glass plate 13 which cracks as a whole when a part is damaged is used for the window glass. Tempered glass is used as the glass plate 13.

  FIG. 1B is a partial cross-sectional view of the vicinity of the left triangular window 12 corresponding to the line AA in FIG. As shown in FIG. 1B, the glass plate 13 of the triangular window 12 is fixed to a vehicle body (body) 15 via an adhesive (glass adhesive) 14 at the periphery. In addition, the thickness of the glass plate 13 is about 3.1 mm-5.0 mm.

  As shown in FIG. 1 (b), the window glass breakage sensor 20 is located on the vehicle body 15 at a position corresponding to the peripheral edge of the glass plate 13 and inside the adhesive 14 with respect to the peripheral edge of the glass plate 13. A window glass breakage sensor film 30 is provided. The window glass break sensor 20 is a sensor that detects breakage of the glass plate 13 of the window for an automobile. The window glass breakage sensor film 30 constituting the window glass breakage sensor 20 is covered with an interior 16 of the vehicle 11.

Hereinafter, the window glass breakage sensor 20 will be described in detail.
FIG. 2 shows a plan view and a cross section of the window glass breakage sensor film 30. FIG. 3 is an electrical configuration diagram of the window glass breakage sensor. 4 is a cross-sectional view taken along line BB in FIG. FIGS. 5A to 5E are cross-sectional views showing the manufacturing process of the window glass breakage sensor film 30.

As shown in FIG. 1B, the window glass break sensor 20 includes a window glass break sensor film 30, a determination circuit 60, and an alarm device 70.
As shown in FIG. 2, the window glass breakage sensor film 30 has a rectangular shape as a planar structure. As shown in FIGS. 2 and 4, the window glass breakage sensor film 30 is made of a laminate of an adhesive layer 31, an insulating layer 32, a conductive layer 33, and an insulating layer 34 as a cross-sectional structure. The insulating layers 32 and 34 are resin layers. The insulating layer 32 functions as a base member, and the insulating layer 34 functions as a surface protective film.

  The conductive layer 33 is patterned on the surface of the glass plate 13 so that the fine line portion 33a extends linearly by printing. That is, in the thin film 30 (inside a plurality of laminated sheet materials), the conductive layer 33 having the thin line portions 33a is patterned by printing. The thin wire portion 33a of the conductive layer 33 has a pattern that extends in the direction perpendicular to the direction X of the crack generated when the glass plate 13 is broken or the direction X in which the crack extends in FIG. The line width of the thin line portion 33a of the conductive layer 33 is about 200 μm.

  Since the thin line portion 33a of the conductive layer 33 is a fine pattern, it is easily disconnected. Wide electrodes 33b and 33c are formed on both ends of one thin line portion 33a. Openings 34a and 34b are formed in the insulating layer 34 on the electrodes 33b and 33c, and the electrodes 33b and 33c are exposed through the openings 34a and 34b. This exposed portion is an electrode extraction portion. A conductive layer 33 is attached to the glass plate 13 by the adhesive layer 31.

  The window glass breakage sensor film 30 shown in FIG. 2 is attached to the glass plate 13 as shown in FIG. 1B, whereby the conductive layer having the electrodes 33b and 33c on the glass plate 13 of the automobile window. 33 is extended. As shown in FIG. 1B, one end of the wire harness 50 is connected to the electrodes 33 b and 33 c in FIG. 2 via the connector C, and the determination circuit 60 is connected to the other end of the wire harness 50. When the glass plate 13 is broken, the conductive layer 33 of the window glass breakage sensor film 30 is disconnected or changes in resistance due to a minute crack. Breakage of the glass plate 13 is detected by disconnection or resistance change of the conductive layer 33.

  Thus, since the window glass breakage sensor film 30 is affixed to the glass plate 13, it is not necessary to directly print the conductive layer 33 on the glass plate 13, so that the cost can be reduced. Moreover, it can attach with respect to the glass plate 13 without the conductive layer 33 by retrofitting. Further, by forming the conductive layer 33 made of a thin wire, it is possible to detect even if the glass plate 13 is not completely pulverized due to breakage of the window glass.

  In FIG. 3, the first terminal 30a in the conductive layer 33 of the window glass breakage sensor film 30 is grounded. The second terminal 30 b in the conductive layer 33 is electrically connected to the connection terminal 60 a of the determination circuit 60. The determination circuit 60 includes a microcomputer 61, a transistor 62, and resistors 63 and 64. The input port of the microcomputer 61 is connected to the connection terminal 60 a of the determination circuit 60 through the resistor 64. The transistor (npn transistor) 62 has a collector connected to the power supply terminal + B and an emitter connected to the connection terminal 60 a via the resistor 63. The base of the transistor 62 is connected to the output port of the microcomputer 61. An alarm device 70 is connected to the microcomputer 61 of the determination circuit 60.

Next, the manufacturing method of the film 30 for window glass breakage sensors and the construction method to the glass plate 13 are demonstrated using FIG.
First, as shown in FIG. 5A, a plastic film 40 that functions as a support for a printed material is prepared. The plastic film 40 as a printed film supporting base film for supporting the printed material has the same shape and the same size as the window glass breakage sensor film 30. As the plastic film 40, any one selected from polyethylene terephthalate (PET), polyethylene naphthalate (PEN), acrylic, polycarbonate (PC), polyimide (PI), liquid crystal polymer (LCP), and polyarylate (PAR). Resin is used. In particular, polyimide (PI), liquid crystal polymer (LCP), and polyarylate (PAR) are better when a heat resistant film is used.

Then, as shown in FIG. 5B, an insulating layer 34 is formed on the plastic film 40 by screen printing. Then, it heats.
Further, as shown in FIG. 5C, the conductive layer 33 is patterned on the insulating layer 34 by screen printing. Then, it heats.

  In the patterning step of the conductive layer 33, the conductive layer 33 was dispersed in any one system selected from thermosetting polyester, urethane, rubber, polyimide, epoxy, and phenol. It is formed using printing ink made of silver particles. Thereby, the conductive layer 33 is configured by electrically connecting metal particles with a resin as a binder.

  Carbon particles may be used instead of silver particles, copper (Cu) particles, nickel (Ni) particles, palladium (Pd) particles, or alloy particles. Or you may form the conductive layer 33 using the printing ink which consists of both silver particles and carbon particles.

Subsequently, as shown in FIG. 5D, an insulating layer 32 is formed on the insulating layer 34 so as to cover the conductive layer 33 by screen printing. Then, it heats.
Then, as shown in FIG. 5E, an adhesive layer 31 is formed on the insulating layer 32 by screen printing. Then, it heats.

Thereby, the film 30 for window glass breakage sensors is manufactured.
The window glass breakage sensor film 30 has an insulating layer 34 between a conductive layer 33 and a plastic film (base film) 40, and the insulating layer 34 is a thermosetting or ultraviolet curable polyester printing ink, It is formed using any one kind of printing ink selected from acrylic printing ink, acrylic urethane printing ink, urethane printing ink, and polyimide printing ink. Similarly, the window glass breakage sensor film 30 has an insulating layer 32 between the adhesive layer 31 and the conductive layer 33, and the insulating layer 32 is made of a thermosetting or ultraviolet curable polyester printing ink, acrylic. It is formed using any one type of printing ink selected from a system printing ink, an acrylic urethane printing ink, a urethane printing ink, and a polyimide printing ink.

  Examples of the binder that electrically connects the metal particles in the conductive layer 33 include polyester, acrylic, acrylurethane, urethane, and polyimide. In addition, the following can be used from the viewpoint of insulating properties. Can be used. As the evaporative drying binder, acrylic resin, copolymerized polyester, polyurethane, and vinyl chloride vinyl acetate copolymer can be used. Moreover, an epoxy resin, a phenol resin, copolymer polyester, a polyurethane, and a polyvinyl acetate vinyl vinyl copolymer can be used as a thermosetting binder. Furthermore, an acrylic resin or an acrylic urethane resin can be used as the UV curable inder. As materials, vinyl chloride, epoxy, phenol, olefin, and silicone are used. In short, as the binder in the conductive layer 33, a thermoplastic resin, a thermosetting resin, a UV curable resin, or the like may be used.

  5E, the thickness of the plastic film 40 is about 50 to several hundreds of micrometers, the thickness of the adhesive layer 31 is about several micrometers (for example, 6 μm), and the thickness of the insulating layer 32 is about several micrometers ( For example, the thickness of the conductive layer 33 is about several μm (for example, 3 μm), and the thickness of the insulating layer 34 is about several μm (for example, 3 μm).

  When the film 30 for window glass breakage sensor is mounted on the glass plate 13 of the vehicle, as shown in FIG. 6A, the window glass breakage sensor is applied to one surface (glass surface) of the glass plate 13. The window glass breakage sensor film 30 is affixed to the glass plate 13 by the adhesive layer 31 by bringing the adhesive layer 31 of the film 30 into contact.

  Here, a thermosetting adhesive is used as the adhesive layer 31. In addition, a double-sided tape may be used as the adhesive layer 31, and an acrylic non-carrier pressure-sensitive adhesive, a rubber-based pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive, or a vinyl-based pressure-sensitive adhesive may be used as the pressure-sensitive adhesive for this double-sided tape.

Thereafter, when the plastic film 40 is peeled off, the window glass breakage sensor film 30 is attached to the glass plate 13 as shown in FIG.
In this way, the window glass breakage sensor film 30 is a transfer type in which only the printed film remains when the plastic film 40 is peeled off when being attached to the glass plate 13.

Next, the operation of the thus configured window glass breakage sensor 20 will be described.
When a part of the glass plate 13 is broken, the entire glass plate 13 is cracked. This state is shown in FIG. FIG. 7 is a cross-sectional view taken along a line CC in FIG.

  FIG. 7 shows a state where the conductive layer 33 is disconnected due to a crack in the extending direction of the conductive layer 33. Even if the glass plate 13 is broken without being vibrated using a tool, the conductive layer 33 made of fine wires is broken or cracked at the sticking portion of the window glass breakage sensor film 30 due to cracks. As a result, a crack occurs in a part of the conductive layer 33. In this case, the resistance of the conductive layer 33 is increased. In other words, it can be said that the resistance value of the disconnection of the conductive layer 33 becomes infinite, and the resistance value increases by a predetermined amount when a crack is partially formed.

  The microcomputer 61 of the determination circuit 60 in FIG. 3 sets the output port to the H level at a constant cycle and turns on the transistor 62. Then, the microcomputer 61 determines whether or not the level of the input port is higher than a predetermined potential. If neither the disconnection nor the increase in the resistance value occurs in the conductive layer 33 of the window glass breakage sensor film 30, the microcomputer input port is at the ground level. If the input port is at the ground level when the transistor 62 is turned on, the microcomputer 61 determines that the window glass is not broken and is normal.

  On the other hand, when the window glass is broken, the conductive layer 33 is disconnected or increases in resistance. The microcomputer 61 determines that the window glass is broken if the input port is not at the ground level when the transistor 62 is turned on. Then, the microcomputer 61 of the determination circuit 60 notifies the outside of the window glass breakage (occurrence of abnormality) by an alarm device 70 using an alarm sound or an alarm lamp.

According to the above embodiment, the following effects can be obtained.
(1) As shown in FIG. 4, the window glass break sensor 20 affixes the conductive layer 33 patterned to extend linearly on the surface of the glass plate 13 and the conductive layer 33 to the glass plate 13. The adhesive layer 31 is detected, and breakage of the glass plate 13 is detected by disconnection of the conductive layer 33 or resistance change. As shown in FIG. 5E, the window glass breakage sensor film 30 is formed by printing on the plastic film 40 and the conductive layer 33 patterned to extend linearly on the plastic film 40, An adhesive layer 31 for attaching the conductive layer 33 to the glass plate 13 is provided. As shown in FIG. 5, as a method for manufacturing the window glass breakage sensor film 30, the glass plate 13 of the window for automobiles is broken due to breakage or resistance change that extends linearly by printing on a plastic film 40 as a base film. A conductive layer patterning step of patterning the conductive layer 33 for detection and an adhesive layer forming step of forming the adhesive layer 31 by printing on the conductive layer 33 on the plastic film 40 are included.

Therefore, the conductor is formed by printing without depending on the wiring, and it is possible to reliably detect breakage of the window glass.
(2) As shown in FIG. 2, the conductive layer 33 is extended in the direction X of the crack generated when the glass plate 13 is broken or in the direction X orthogonal to the direction in which the crack extends. Preferred above.

  (3) As shown in FIGS. 6A and 6B, the plastic film 40 is peeled off after being attached to the glass plate 13, so that it can be a highly sensitive window glass breakage sensor.

  Even when a pressure-sensitive adhesive that pressurizes and adheres to the glass plate 13 is used as the adhesive layer 31 of the window glass breakage sensor film 30, the film 30 and the glass plate 13 are bonded to the glass plate 13. Induction heating type that adheres by induction heating at least one of film 30 and glass plate 13 when affixing to glass plate 13 even when a thermocompression bonding adhesive that is bonded by heating and pressurizing at least one is used. Even when an adhesive is used, it is cured by irradiating at least one of the film 30 and the glass plate 13 with an active energy ray (electron beam, X-ray, ultraviolet ray, visible ray, infrared ray, etc.) when being attached to the glass plate 13. You may use the adhesive agent (UV adhesive etc.) to adhere | attach.

A modification of this embodiment will be described. In FIG. 6 (b), the plastic film 40 of FIG. 6 (a) is peeled off and used. However, as shown in FIG. 8, the plastic film 40 of FIG. 6 (a) may be used as it is without being peeled off.
(Second Embodiment)
Next, the second embodiment will be described focusing on the differences from the first embodiment.

In the present embodiment, a configuration shown in FIG. 9 is used instead of FIG. Moreover, it is set as the structure shown in FIG. 10 instead of FIG.
As shown in FIG. 9, the window glass breakage sensor film 30 in this embodiment has an insulating layer 34 formed on a plastic film 40 and a conductive layer 33 on the insulating layer 34 before being attached to the glass plate. And an adhesive layer 31 is formed on the insulating layer 34 including the conductive layer 33.

  The window glass breakage sensor film 30 shown in FIG. 9 is mounted on the glass plate 13 of the vehicle as shown in FIG. That is, the adhesive layer 31 of the window glass break sensor film 30 is brought into contact with one surface (glass surface) of the glass plate 13, and the window glass break sensor film 30 is attached to the glass plate 13 by the adhesive layer 31. . Thereafter, when the plastic film 40 is peeled off, the window glass breakage sensor film 30 is attached to the glass plate 13.

A modification of this embodiment will be described. In FIG. 10, the plastic film 40 of FIG. 9 is peeled off and used, but as shown in FIG. 11, the plastic film 40 of FIG. 9 may be used as it is without being peeled off.
(Third embodiment)
Next, the third embodiment will be described focusing on the differences from the first embodiment.

In the present embodiment, a configuration shown in FIG. 12 is used instead of FIG. Moreover, it is set as the structure shown in FIG. 13 instead of FIG.
As shown in FIG. 12, the window glass breakage sensor film 30 in this embodiment has an insulating layer 34 formed on a plastic film 40 and a conductive layer 33 on the insulating layer 34 before being attached to the glass plate. Is patterned, and an insulating layer 32 is formed on the insulating layer 34 including the conductive layer 33. On the other hand, an adhesive layer 36 is formed on the lower surface of the plastic film 40.

  The window glass breakage sensor film 30 shown in FIG. 12 is attached to the glass plate 13 of the vehicle as shown in FIG. In other words, the adhesive layer 36 of the window glass breakage sensor film 30 is brought into contact with one surface (glass surface) of the glass plate 13 and the window glass breakage sensor film 30 is attached to the glass plate 13 by the adhesive layer 36. . Thus, the window glass breakage sensor film 30 is attached to the glass plate 13.

Here, the film 30 in FIG. 5 (e), the film 30 in FIG. 9, and the film 30 in FIG. 12 are properly used according to the following specifications.
The film 30 including the insulating layers 32 and 34 and the plastic film 40 shown in FIG. 5E has high sensitivity and is easy to be attached to the glass plate 13. Here, when the plastic film 40 is peeled and removed as shown in FIG. 4, it can be used as a high sensitivity type, and when the plastic film 40 is left without peeling as shown in FIG. 8, it can be used as a low sensitivity type.

  The film 30 including the insulating layer 34 and the plastic film 40 shown in FIG. 9 has the highest sensitivity but is difficult to attach to the glass plate 13. Here, when the plastic film 40 is peeled and removed as shown in FIG. 10, it can be used as a high sensitivity type, and when the plastic film 40 is left without peeling as shown in FIG. 11, it can be used as a low sensitivity type.

  The film 30 including the insulating layers 32 and 34 and the plastic film 40 shown in FIG. 12 has low sensitivity because cracks generated in the glass plate 13 due to the thick plastic film 40 are difficult to reach the conductive layer 33. On the other hand, as shown in FIG. 13, the glass plate 13 can be attached very easily.

The sensor sensitivity can also be adjusted by adjusting the thickness of the insulating layer or the adhesive layer.
(Fourth embodiment)
Next, the fourth embodiment will be described with a focus on differences from the first embodiment.

In the present embodiment, the configuration shown in FIG. 14 is used instead of FIG.
In FIG. 14, the conductive layer 33 is patterned in a U shape, and wide electrodes 33b and 33c are formed at both ends thereof.

  As a modification of the pattern shown in FIG. 2, that is, a pattern in which the conductive layer 33 is folded back multiple times, as shown in FIG. 15, the conductive layer 33 may be patterned in a spiral shape. As described above, when the conductive layer 33 extends in a spiral shape, the conductive layer 33 can cause disconnection or resistance change with respect to cracks in all directions.

The film 30 in FIG. 2, the film 30 in FIG. 14, and the film 30 in FIG. 15 are properly used according to the following specifications.
The film 30 in which the thin line portion 33a shown in FIG. 14 extends in a straight line is suitable when the direction in which the crack due to the window glass breaks can be specified is specified. Moreover, it is effective when it can affix with the length comparable as one side of a glass plate.

  The film 30 in which the thin wire portion 33a shown in FIG. 2 is folded back in a comb-teeth shape is suitable when the location where a crack is generated due to breakage of the window glass and the direction in which the crack extends can be specified. It is also effective when it is necessary to measure the degree of cracks.

The film 30 in which the fine wire portion 33a shown in FIG. 15 is spiral can identify the location where a crack is generated due to breakage of the window glass, but is effective when the direction in which the crack extends is unknown.
(Fifth embodiment)
Next, the fifth embodiment will be described with a focus on differences from the fourth embodiment.

  In this embodiment, the configuration shown in FIG. 16 is used instead of FIG. FIG. 17 shows a longitudinal section taken along line CC in FIG. FIG. 17 shows a state after the window glass breakage sensor film 30 is attached to the glass plate 13, and FIG. 18 shows the window glass breakage sensor film 30 before being attached to the glass plate 13.

  In FIG. 17, an insulating layer (resin layer) 38 is formed on the adhesive layer 31, and an insulating layer 37 is patterned on the upper surface of the insulating layer 38. If it demonstrates in FIG. 16, it will be patterned so that it may extend radially for every predetermined angle with respect to the center of the conductive layer 33 patterned spirally. In FIG. 17, a step is formed by an insulating layer (resin layer) 37, and the conductive layer 33 is patterned in a spiral shape on the insulating layer 38 including the step insulating layer 37. An insulating layer (resin layer) 39 is formed on the insulating layer 38 including the conductive layer 33.

  In the state before being attached to the glass plate shown in FIG. 18, in the window glass breakage sensor film 30 in this embodiment, an insulating layer 39 is formed on the plastic film 40, and the conductive layer 33 is patterned on the insulating layer 39. The conductive layer 33 is patterned so as to straddle the step insulating layer 37. An insulating layer 38 is formed on an insulating layer 39 including the step insulating layer 37 and the conductive layer 33, and an adhesive layer 31 is formed thereon.

  The window glass breakage sensor film 30 shown in FIG. 18 is attached to the glass plate 13 of the vehicle as shown in FIG. That is, the adhesive layer 31 of the window glass break sensor film 30 is brought into contact with one surface (glass surface) of the glass plate 13, and the window glass break sensor film 30 is attached to the glass plate 13 by the adhesive layer 31. . Thereafter, when the plastic film 40 is peeled off, the window glass breakage sensor film 30 is attached to the glass plate 13. At this time, as shown in FIG. 16, the step insulating layer 37 is provided radially at predetermined angles with respect to the center of the conductive layer 33 patterned in a spiral shape.

This step is preferable when the conductive layer 33 is detected by amplifying the distortion caused by the crack caused by breakage of the window glass to the conductive layer 33.
As described above, as shown in FIGS. 17 and 18, the insulating layer 37 is formed between the adhesive layer 31 and the conductive layer 33, and the insulating layer 37 is orthogonal to the extending direction of the conductive layer 33. When patterning is performed so as to extend in the direction in which the glass plate 13 extends, distortion associated with breakage of the glass plate 13 is amplified, and breakage of the window glass can be detected with high sensitivity.

  As shown in FIGS. 17 and 18, the conductive layer 33 has irregularities 75 formed on the surface thereof. Specifically, the irregularities 75 are formed by corrugating in the thickness direction. By forming the irregularities 75 on the surface of the conductive layer 33, distortion due to breakage of the glass plate 13 is amplified, and breakage of the window glass can be detected with high sensitivity. As a configuration in which the unevenness 75 is formed on the surface of the conductive layer 33 in place of FIG. 17, as shown in FIG. 19, the conductive layer 33 has a two-layered structure, and 2 in a predetermined region on the first conductive layer 76. The unevenness 75 may be formed on the surface of the conductive layer 33 made of the conductive layers 76 and 77 by laminating the conductive layer 77 of the layer.

  A modification of this embodiment will be described. As shown in FIG. 20, a step insulating layer 37 may be formed on the window glass breakage sensor film 30 shown in FIG. At this time, the step insulating layer 37 is provided in parallel with a predetermined distance.

Note that a step insulating layer 37 extending in the X direction in the drawing may also be formed in the film 30 of FIG.
(Sixth embodiment)
Next, the sixth embodiment will be described with a focus on differences from the first embodiment.

  In this embodiment, the configuration shown in FIG. 21 is used instead of FIG. FIG. 21 is a sectional view of the window glass breakage sensor film 30, and FIG. 22 is a plan view of the window glass breakage sensor film 30. 21 and 22 show a state after the window glass breakage sensor film 30 is mounted on the glass plate 13.

  As shown in FIG. 21, the window glass breakage sensor film 30 in the present embodiment has a design layer 80 formed by printing on the adhesive layer 31 (having a design layer 80 formed by printing). . The insulating layer 32 is formed on the design layer 80, the conductive layer 33 is patterned on the insulating layer 32, and the insulating layer 34 is formed on the insulating layer 32 including the conductive layer 33.

A design printed matter is drawn on the design layer 80 of FIG. 21 as shown in FIG. In FIG. 22, a square frame and “Sensor is operating” are printed in the frame.
Therefore, when looking at the triangular window 12 at the rear of the vehicle 11 in FIG. 1 from the outside of the vehicle, the conductive layer 33 can be shielded as shown in FIG. Can be prevented.

What is necessary is just to pattern a character, a picture, a design, a pattern, etc. in the design layer 80, and, thereby, the function of the improvement of design property or the crime prevention effect by visual observation can be added.
(Seventh embodiment)
Next, a seventh embodiment will be described focusing on differences from the above embodiments.

  In each of the above embodiments, the conductive layer 33 is formed using printing ink made of silver particles and / or carbon particles dispersed in a resin in the manufacturing process of the film 30. Instead, in this embodiment, the conductive layer 33 is formed. It is as follows. The conductive layer 33 is formed using a printing ink containing at least organometallic particles. It is preferable to use organic silver particles as the organic metal particles. Specifically, for example, from metal oxide particles for any one metal selected from Ag, Au, Pt, Ni, Cu, Pd and Al, and Ag, Au, Pt, Ni, Cu, Pd and Al. It forms using the printing ink which consists of an organometallic particle about any 1 type of metal chosen. More specifically, the conductive layer 33 is formed using a printing ink composed of thermally reactive silver oxide particles and organic silver particles. Thus, the conductive layer 33 is configured by electrically connecting metal particles (having a particle size of about several nm to several tens of μm) by direct welding.

Hereinafter, a description will be given by comparing the case of using a normal conductive ink and a thermal reaction type conductive ink.
A normal conductive ink is a thermosetting conductive ink in which silver particles are dispersed in a resin. In this ink, after heating after application of the ink, the metal particles are dispersed in the resin as the binder as shown in FIG. 23A, and the metal particles are electrically connected by contact.

  On the other hand, the heat-reactive conductive ink is not a metal at the time of application, but is baked into a metal and has a brittle property. That is, after heating after application of the ink, the metal particles are deposited by heat as shown in FIG. 24A, and the metal particles are connected in a state without resin (metal particles). They are connected by welding with each other).

  Therefore, from the state shown in FIG. 25 (a), when the glass plate 13 is crushed as shown in FIG. 25 (b), and FIGS. 25 (c), (d), (e), (e), When a crack occurs as shown in (f), it is as follows.

  (A); As shown in FIG. 25 (b), when the glass plate 13 is detached into each piece due to breakage, the thin wire portion 33a of the conductive layer 33 is broken, so that the electrical path is open. At this time, when an ordinary thermosetting conductive ink is used, both the metal particles and the binder are broken as shown in FIG. On the other hand, when the heat-reactive conductive ink is used, the metal particles are broken as shown in FIG.

  (B): When a large crack occurs in the glass plate 13 as shown in FIG. 25 (c), the crack width on the surface of the glass plate is large, and the thin wire portion 33a of the conductive layer 33 is broken, and the electric path is open. It becomes. At this time, when an ordinary thermosetting conductive ink is used, both the metal particles and the binder are broken as shown in FIG. On the other hand, when the heat-reactive conductive ink is used, the metal particles are broken as shown in FIG.

  (C): When a moderate crack occurs in the glass plate 13 as shown in FIG. 25 (d), the crack width on the surface of the glass plate is moderately large and the thin wire portion 33a of the conductive layer 33 breaks. The route is open. At this time, when ordinary thermosetting conductive ink is used, as shown in FIG. 23 (d), the binder is not broken and the metal particles are disconnected and the resistance is increased. On the other hand, when the heat-reactive conductive ink is used, the metal particles are broken as shown in FIG.

  (D): When a small crack occurs in the glass plate 13 as shown in FIG. 25 (e), the crack width on the surface of the glass plate is small and the crack reaches a part of the conductive layer 33, and the fine wire of the conductive layer 33 The portion 33a increases in resistance. At this time, when an ordinary thermosetting conductive ink is used, the contact area of the metal particles is reduced without breaking the binder as shown in FIG. On the other hand, when the heat-reactive conductive ink is used, the metal particles are broken as shown in FIG.

  (E): As shown in FIG. 25 (f), when a minute crack occurs in the glass plate 13, the crack width on the surface of the glass plate is minute and the crack does not reach the conductive layer 33. Thereby, the resistance in the thin wire portion 33a of the conductive layer 33 is increased. At this time, when an ordinary thermosetting conductive ink is used, as shown in FIG. 23 (f), the binder does not break and the connection of the metal particles is hardly affected, and a slight change in resistance value occurs. On the other hand, when the thermal reaction type conductive ink is used, the resistance value changes without breaking the metal (between particles) because it is within the stretch ratio of the metal component as shown in FIG.

  In this way, the resistance value in the pattern of the conductive layer 33 has a predetermined value (for example, a resistance value “10”) at the beginning of mounting on the glass plate 13 as shown in FIG. In the above (A) and (B), the resistance value in the pattern of the conductive layer 33 is infinite regardless of whether a normal thermosetting conductive ink or a heat-reactive conductive ink is used. It becomes. In the above (C), when a normal thermosetting conductive ink is used, a predetermined value, for example, a resistance value “1000” is shown, and when a heat reaction type conductive ink is used, it is infinite. It becomes. Further, in the above (D), when a normal thermosetting conductive ink is used, a predetermined value, for example, a resistance value “100” is shown, and when a thermal reaction type conductive ink is used, it is infinite. It becomes. Furthermore, in the above (E), when a normal thermosetting conductive ink is used, a predetermined value, for example, a resistance value “20” is shown, and when a thermal reaction type conductive ink is used, a predetermined value is displayed. For example, the resistance value is “15”.

  In this way, when ordinary thermosetting conductive ink is used, it is easy to stretch due to window glass breakage, and the resistance value continuously changes due to window glass breakage. On the other hand, when the heat-reactive conductive ink is used, the resistance value changes in a binary manner due to breakage of the window glass, which is easily broken due to breakage of the window glass.

  Therefore, when the thermosetting conductive ink is used, a circuit for measuring a change in resistance value is required, which causes a complicated circuit configuration. On the other hand, when the thermal reaction type conductive ink is used, it is only necessary to monitor the resistance value to be binarized, and the circuit configuration can be simplified.

The embodiment is not limited to the above, and may be embodied as follows, for example.
The window glass breakage sensor 20 (window glass breakage sensor film 30) may be of a type in which the adhesive layer 31 and the conductive layer 33 are laminated and printed directly on the glass plate 13 and attached to the glass plate 13.

  The glass plate 13 may be laminated glass or tempered glass. In the case of laminated glass, the resistance value of the conductive layer 33 is likely to change due to distortion caused by breakage of the window glass. In the case of tempered glass, the property that the conductive layer 33 is disconnected due to a crack caused by breakage of the window glass and the resistance value becomes theoretically infinite is used.

  -It may be applied to residential windows instead of automobile windows.

  DESCRIPTION OF SYMBOLS 12 ... Triangular window, 13 ... Glass plate, 20 ... Window glass break sensor, 30 ... Film for window glass break sensor, 31 ... Adhesive layer, 32 ... Insulating layer, 33 ... Conductive layer, 33a ... Fine wire part, 32b ... Electrode, 33c ... Electrode, 34 ... Insulating layer, 37 ... Insulating layer, 40 ... Plastic film, 60 ... Determination circuit, 75 ... Concavity and convexity.

Claims (20)

A sensor for detecting breakage of a glass plate of a window,
A conductive layer patterned by printing on the surface of the glass plate;
An adhesive layer for attaching the conductive layer to the glass plate;
With
A window glass breakage sensor, wherein breakage of the glass plate is detected by disconnection or resistance change of the conductive layer. It is a film for window glass breakage sensor affixed to a glass plate of a window,
A base film for supporting printed matter;
Patterned by printing on the base film, a conductive layer for detecting breakage of the glass plate by disconnection or resistance change,
Formed by printing on the base film, and an adhesive layer for attaching the conductive layer to the glass plate;
A window glass breakage sensor film comprising: A conductive layer patterning step of patterning a conductive layer for detecting breakage of a glass plate of a window due to disconnection or resistance change by printing on a base film for supporting printed matter; and
An adhesive layer forming step of forming an adhesive layer by printing on the conductive layer on the printed support base film;
The manufacturing method of the film for window glass breakage sensors characterized by having.   The window glass breakage sensor according to claim 1, wherein the conductive layer extends in a direction perpendicular to a direction of a crack generated when the glass plate is broken or a direction in which the crack extends.   The window glass breakage sensor according to claim 1, wherein the conductive layer extends in a spiral shape.   2. An insulating layer formed between the adhesive layer and the conductive layer, wherein the insulating layer is patterned to extend in a direction orthogonal to the extending direction of the conductive layer. The window glass break sensor described in 1.   The window glass breakage sensor according to any one of claims 1 and 4, wherein the conductive layer has irregularities formed on a surface thereof.   The window glass breakage sensor according to claim 1, wherein the adhesive layer and the conductive layer are laminated and printed directly on the glass plate.   The window glass breakage sensor according to any one of claims 1 and 4 to 8, wherein the conductive layer is configured by electrically connecting metal particles by direct welding.   The window glass breakage sensor according to any one of claims 1 and 4, wherein a double-sided tape or a thermosetting adhesive is used as the adhesive layer.   The window glass breakage sensor film according to claim 2, wherein the conductive layer extends in a spiral shape.   3. An insulating layer formed between the adhesive layer and the conductive layer, wherein the insulating layer is patterned so as to extend in a direction orthogonal to the extending direction of the conductive layer. The film for window glass breakage sensors described in 1.   The film for window glass breakage sensor according to any one of claims 2, 11, and 12, wherein the conductive layer has irregularities formed on a surface thereof.   14. The window glass breakage sensor film according to claim 2, wherein the conductive layer is formed by electrically connecting metal particles by direct welding.   The window glass breakage sensor film according to any one of claims 2, 11 to 14, wherein the base film is peeled off after being attached to a glass plate.   The said conductive layer is formed using the printing ink containing an organometallic particle at least, The manufacturing method of the film for window glass breakage sensors of Claim 3 characterized by the above-mentioned.   The method for producing a film for a window glass breakage sensor according to claim 16, wherein organic silver particles are used as the organic metal particles.   The window glass break sensor according to claim 1, wherein the window is an automobile window.   The window glass breakage sensor film according to claim 2, wherein the window is an automobile window.   The said window is a window for motor vehicles, The manufacturing method of the film for window glass breakage sensors of any one of Claim 3, 16, 17 characterized by the above-mentioned.

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