JP2020023237A - Device for detecting catching in door panel - Google Patents

Abstract

To provide a device for detecting a catching in a door panel which has high durability.SOLUTION: A device for detecting a catching in a door panel which detects a catching state where a foreign object is caught in the door panels at the time of opening or closing of the panel, the panels being arranged to be able to open or close, comprises a laminate in which a dielectric layer, a first electrode layer, a conductive resin layer and a second electrode layer are laminated in this order and the first electrode layer is a sheet including a first cloth made from conductive fiber and a first conductive resin phase covering the first cloth.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a door pinch detection device for detecting a door pinch state in which a foreign object is pinched when a door provided to be openable and closable is opened or closed. Specifically, for example, when the vehicle door is opened, a foreign matter is caught in the gap between the door pocket opening and the vehicle door, or when the vehicle door is closed, the door rubber between a pair of doors is closed. The present invention relates to a door pinch detection device for detecting that a foreign object is pinched in a door.

  2. Description of the Related Art Conventionally, some vehicles such as railways are provided with a door-jam detecting device that detects that a belonging or the like is jammed when a vehicle door is closed. This door pinch detection device, for example, when the vehicle door is closed, by detecting the pressing state of the door rubber provided at the tip of the vehicle door, to determine whether the door pinch state To detect. In other words, the door pinch detection device detects a change in the pressed state of the door rubber because the door rubber is pressed in an unusual state when the belongings are caught when the vehicle door is closed. By detecting, the pinching state is detected.

  For example, the door pinch detection device disclosed in Patent Literature 1 forms a space in a door rubber and detects a pressure change in the space to detect deformation of the door rubber, that is, a pressed state.

JP 2008-8121 A

  However, such door tip rubbers have cracks and holes due to aging due to continuous use. Then, since air leaks from the space in the door rubber, the pressure change may be larger than the target, and the deformation state of the door rubber, that is, the pressed state may not be able to be accurately detected. there were.

  Accordingly, an object of the present invention is to provide a door jam detector having excellent durability.

  The present inventors have conducted intensive studies to achieve the above object, and as a result, used a sheet in which a cloth using conductive fibers was coated with a conductive resin as an electrode layer, and arranged a conductive resin layer between the electrode layers. The resistance type pressure sensor is used as a sensor for detecting the state of pinching the door, so it has excellent durability, and when used for door rubber or door pocket rubber, cracks and holes are unlikely to occur. It has been found that pressure detection is easy. The present invention has been completed based on these findings.

  That is, the present invention is a door pinch detection device for detecting that a foreign substance is pinched when a door provided to be openable or closable is opened or closed. An electrode layer, a conductive resin layer, and a second electrode layer include a laminate in which the layers are stacked in this order, and the first electrode layer includes a first fabric using conductive fibers and a first fabric using a conductive fiber. And a first conductive resin phase covering the first conductive resin phase.

  The pinch detection device of the present invention uses a sheet in which a cloth using a conductive fiber is coated with a conductive resin phase as an electrode, thereby using a cloth not coated with a conductive resin phase as an electrode. On the other hand, it has excellent durability and can suppress the generation of cracks and holes. Further, in a pressure-sensitive sensor using, as an electrode, a sheet in which a cloth using conductive fibers is coated with a conductive resin phase, a resistive pressure-sensitive sensor having a conductive resin layer interposed between two electrodes is used. Therefore, when no pressure is applied, no current flows or a small amount of current flows through the two electrode layers. When a pressure is applied, the conductive resin is applied in accordance with the magnitude of the pressure. The layer is distorted, for example, the number of contacts of the conductive agent in the conductive resin layer increases, and the current flowing between the two electrode layers increases stepwise, so that stepwise pressure detection can be easily performed from the beginning of the pressure load. Become. For this reason, compared to the case of using a conventional pressure-sensitive sensor that detects the pressure state by detecting the pressure change in the internal space of the door tip rubber or the door pocket rubber, even if a crack or the like occurs, the detection performance is improved. Is extremely small, and the detectability is not extremely reduced.

  It is preferable that the second electrode layer is a sheet including a second fabric using conductive fibers and a second conductive resin phase covering the second fabric. The sandwiching detection device of the present invention including the laminate having such a configuration uses a sheet in which a cloth using conductive fibers is coated with a conductive resin phase as both electrodes, so that flexibility and Superior in durability.

  The first fabric may be a fabric partially using conductive fibers. The door pinch detection device of the present invention including the laminate having such a configuration can use an insulating fiber that is more flexible than the conductive fiber for the first cloth. In this case, while being excellent in durability, More flexible.

  The conductive resin layer is preferably a foamed layer. The pinch detection device of the present invention including the laminate having such a configuration further improves flexibility. Further, at the time of repeated compressive deformation, it is possible to reduce the variation in the contact area between the electrode layer and the conductive resin layer due to one end of the conductive resin layer with respect to the electrode layer under a small load. Therefore, it is possible to detect a pressure excellent in reproducibility of an electric resistance value, which is a detection signal, under a small load with respect to repeated compressive deformation.

  Further, the present invention provides a laminate in which a dielectric layer, a first electrode layer, a conductive resin layer, and a second electrode layer are laminated in this order, and a laminate provided on the second electrode layer side of the laminate. The first electrode layer is a sheet including a first fabric using conductive fibers, and a first conductive resin phase covering the first fabric. To provide door rubber for vehicles.

  The door tip rubber of the present invention has excellent flexibility and durability, and is equipped with the door pinch detection device of the present invention, which is easy to detect the pressure stepwise from the initial stage of the pressure load. When the doors are closed, it is possible to accurately detect a state in which a foreign object is caught between the door tip rubbers of the pair of doors over a long period of time.

  Further, the present invention provides a laminate in which a dielectric layer, a first electrode layer, a conductive resin layer, and a second electrode layer are laminated in this order, and a laminate provided on the second electrode layer side of the laminate. The first electrode layer is a sheet including a first fabric using conductive fibers, and a first conductive resin phase covering the first fabric. To provide door pocket rubber for vehicles.

  The door pocket rubber of the present invention is excellent in flexibility and durability, and is equipped with the door pinch detection device of the present invention in which stepwise pressure detection is easy from the initial stage of the pressure load. It is possible to accurately detect a state in which a foreign object is caught in a gap between the door pocket opening and the door over a long period of time.

  The door pinch detection device of the present invention has excellent durability. For this reason, when adopted for door rubber and door pocket rubber, cracks and holes are unlikely to occur even after repeated use for a long period of time, and even if cracks etc. occur, the detectability will be extremely reduced. There is no.

It is the schematic which shows one Embodiment (1st aspect) of the laminated body in the door pinch detection apparatus of this invention. It is the schematic which shows other embodiment (2nd aspect) of the laminated body in the door pinch detection apparatus of this invention. It is the schematic which shows other embodiment (3rd aspect) of the laminated body in the door pinch detection apparatus of this invention. It is the schematic which shows the modification of the laminated body shown in FIG. It is a schematic diagram showing one embodiment of a door pinch detection device of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic which shows the vicinity of a door pocket opening part in one Embodiment of the vehicle door apparatus using the door pocket rubber and door tip rubber of this invention. 1 is an exploded perspective view showing one embodiment of a door portion of a vehicle door device provided with a door rubber according to the present invention.

  The door pinch detection device of the present invention is a device for detecting a door pinch state in which a foreign object is pinched at the time of opening or closing a door that can be opened and closed. The pinch detection device of the present invention includes a stacked body in which a dielectric layer, a first electrode layer, a conductive resin layer, and a second electrode layer are stacked in this order. The first electrode layer is a sheet including a first fabric using a conductive fiber and a first conductive resin phase covering the first fabric.

[First aspect]
FIGS. 1 to 3 show schematic views of the laminate in the door jam detector of the present invention. In each of the laminates shown in FIGS. 1 to 3, the first electrode layer and the second electrode layer may have a reverse positional relationship. FIGS. 1A and 1B are schematic diagrams showing a first mode which is an embodiment of the above-mentioned laminated body in the door pinch detection device of the present invention, wherein FIG. 1A is a perspective view, and FIG. -I 'sectional drawing is shown, respectively. In a laminate 10 shown in FIG. 1, a first electrode layer 11 and a second electrode layer 12 are laminated via a conductive resin layer 13, and a dielectric layer 14 is formed on the first electrode layer 11. It is laminated. That is, the laminate 10 has the dielectric layer 14, the first electrode layer 11, the conductive resin layer 13, and the second electrode layer 12 laminated in this order. In the laminate 10, the dielectric layer 14 and the first electrode layer 11, the first electrode layer 11 and the conductive resin layer 13, and the second electrode layer 12 and the conductive resin layer 13 are in contact with each other. However, a gap may be provided between each layer as long as the effects of the present invention are not impaired. Further, each of the conductive resin layer 13 and the dielectric layer 14 may be a single layer, or may be multiple layers of the same or different layers.

(First electrode layer)
The first electrode layer 11 is a sheet including a first fabric 11a using the conductive fibers 111 and a first conductive resin phase 11b. The conductive resin phase 11b covers the first cloth 11a. The first cloth 11a is a cloth composed of the conductive fibers 111 and the insulating fibers 112, that is, a cloth partially using the conductive fibers 111. Since the first fabric 11a partially uses the conductive fiber 111, the first fabric 11a can use the insulating fiber 112 which is relatively softer than the conductive fiber 111, and thus has excellent durability. While more flexible. The conductive fiber 111 may be a fiber made of a conductive substance, a fiber in which an insulating fiber is coated with a conductive substance, or a cloth formed from the conductive fiber and / or the insulating fiber. May be plated or vapor-deposited with a metal. In addition, the conductive fiber 111 may be a conductive fiber obtained by a combination of these. The first fabric 11a may use only one kind of conductive fiber or two or more kinds of conductive fibers.

  In the present specification, a fabric refers to one in which many fibers are formed in a thin and wide plate shape, and examples thereof include woven fabric, knitted fabric, nonwoven fabric, felt, and paper.

  As shown in FIG. 1A, in the first electrode layer 11, in the first cloth 11 a, a plurality of conductive fibers 111 are parallel in one direction at equal intervals in a cloth formed of insulating fibers 112. (Stripes). A fabric using the conductive fibers 111 arranged in this manner can be obtained by weaving as a weft or warp constituting a woven fabric, or as a yarn constituting a knitted fabric of a knitted fabric.

  The first electrode layer 11 is a sheet in which a first fabric 11a is covered with a first conductive resin phase 11b. Since the first fabric 11a is coated with the conductive resin phase 11b, even when a fabric using conductive fibers is used as the electrode layer, the durability is excellent and the generation of cracks and holes is suppressed. it can. In the first electrode layer 11, at least a part of the conductive fiber 111 is on the side of the dielectric layer 14 of the first electrode layer 11 (the side of the first electrode layer 11 having the conductive resin layer 13 is different from the side having the conductive resin layer 13). It is exposed on the surface 11f on the opposite side (the upper side in FIGS. 1A and 1B). In the first electrode layer 11, at least a part of the conductive fiber 111 is exposed from the first electrode layer 11, so that the first electrode layer can function as an electrode. The conductive fiber 111 does not need to be exposed from the surface 11f, and may be electrically connected to the conductive fiber 111 and the detector by, for example, exposing from the side surface of the first electrode layer 11. Good.

Examples of the conductive fibers 111 made of a conductive substance include metal fibers, carbon fibers, and conductive polymer fibers. In addition, examples of the fiber in which the insulating fiber is coated with the conductive substance include a metal-coated conductive wire, a conductive plating yarn, and a single or double covered yarn of the conductive yarn. The coating with the conductive substance may be a single layer or multiple layers. The volume resistivity of the linear conductive material such as the conductive fiber 111 is preferably 10 ⁻² Ω · cm or less, more preferably 10 ⁻³ Ω · cm or less, and still more preferably 10 ⁻⁴ Ω · cm or less. is there. The diameter of the conductive fiber is preferably 200 μm or less, more preferably 100 μm or less, from the viewpoint of excellent flexibility. In addition, the thickness of the conductive material coating layer in the fiber in which the insulating fiber is coated with the conductive material is preferably 50 μm or less, more preferably 20 μm or less, from the viewpoint of excellent flexibility. The metal (metal constituting the metal fiber, metal used for coating, and metal used for plating and vapor deposition) is preferably a metal having sufficient conductivity and extensibility, and is preferably gold, silver, copper, or platinum. , Nickel, tin, aluminum and alloys containing these are preferred.

  As the resin constituting the first conductive resin phase 11b, a thermosetting resin and a thermoplastic resin can be used. When a thermosetting resin is used, a crosslinking agent is added to the resin composition constituting the first conductive resin phase 11b, and the composition is heated after impregnating or applying the composition to the first cloth 11a. The first electrode layer 11 is obtained. When a thermoplastic resin is used, the composition constituting the first conductive resin phase 11b is impregnated or applied to the first fabric 11a in a heated or dissolved state in a solvent, and then cooled or dissolved in a solvent. Is volatilized to obtain the first electrode layer 11. As the resin constituting the first conductive resin phase 11b, only one kind may be used, or two or more kinds may be used. Further, a multi-component system such as copolymerization, addition, blending, and alloying may be used alone or in combination.

  The thermosetting resin is preferably a thermosetting resin elastomer. Examples of the thermosetting resin elastomer include a urethane resin elastomer and a silicone resin elastomer. When a vulcanizing agent is used as the crosslinking agent, examples of the thermosetting resin elastomer include, for example, isoprene rubber, chloroprene rubber, epichlorohydrin rubber, butyl rubber, fluorine rubber, styrene-butadiene rubber, butadiene rubber, and nitrile rubber. , Ethylene propylene rubber, epichlorohydrin-ethylene oxide copolymer, epichlorohydrin-ethylene oxide-allyl glycidyl ether terpolymer, ethylene-propylene-diene rubber, acrylonitrile-butadiene rubber, natural rubber and the like.

  As the thermoplastic resin, for example, polyurethane resin, ethylene-vinyl acetate copolymer resin, polyester resin, polyamide resin, polyimide resin, polystyrene resin, polycarbonate resin, polyolefin resin, chlorinated polyethylene resin, Acrylic resin, methacrylic resin, fluorine resin, silicone resin, polyacetal resin (polyoxymethylene), polyarylate resin, polyphenylene ether resin, polyphenylene sulfide, polysulfone, polyethersulfone, polyetheretherketone, vinyl chloride resin And polyvinyl resins.

  It is also preferable to use a thermoplastic resin elastomer (TPE) as the thermoplastic resin. The thermoplastic resin elastomer is composed of a hard phase (hard segment) and a soft phase (soft segment), and is a polymer that exhibits properties as a rubber at room temperature but exhibits thermoplasticity at a high temperature. By using the thermoplastic resin elastomer, the abrasion resistance and durability of the thermoplastic resin composition can be further improved. As the thermoplastic resin, a thermoplastic resin elastomer and a resin other than the thermoplastic resin elastomer may be used in combination.

  Examples of the thermoplastic resin elastomer include, for example, polyurethane thermoplastic elastomer, polyester thermoplastic elastomer, polyamide thermoplastic elastomer, polystyrene thermoplastic elastomer, fluoropolymer thermoplastic elastomer, polyvinyl chloride thermoplastic elastomer, and polyolefin heat. Examples thereof include a plastic elastomer and a polyimide elastomer. The thermoplastic resin elastomer may be a thermoplastic resin elastomer obtained by blending a resin with an elastomer or an oligomer component. Among the thermoplastic resin elastomers, a polyurethane-based thermoplastic elastomer, a polyester-based thermoplastic elastomer, and a polyamide-based thermoplastic elastomer are preferable, and a polyurethane-based thermoplastic elastomer is particularly preferable.

  The first conductive resin phase 11b may contain a conductive agent in order to obtain a desired electric resistance value. Examples of the conductive agent include carbon black, graphite, carbon nanotubes, graphene, copper, aluminum, nickel, iron powder, piezoelectric ceramics, conductive polymers, conductive tin oxide and conductive titanium oxide as metal oxides, and the like. No. In addition, the conductive agent may be resin particles whose surface is coated with the conductive agent. Above all, carbon black is preferable from the viewpoint that a desired electrical resistance value is easily obtained because there are many types. As the conductive agent, only one kind may be used, or two or more kinds may be used.

  The first conductive resin phase 11b may contain other components such as elastic particles, inorganic oxide fillers, and additives. Examples of the elastic particles include a silicone resin, a urethane resin, an acrylic resin, a styrene resin, and a polyamide resin. Examples of the inorganic oxide filler include silica, alumina, titanium oxide, zinc oxide, and magnesium oxide. Examples of the additive include an antioxidant, a plasticizer, a softener, a colorant, a dispersant, a flame retardant, a coupling agent, and the like.

  The thickness of the first electrode layer 11 (excluding the exposed portions of the conductive fibers 111) is, for example, 20 to 600 μm, preferably 25 to 200 μm, and more preferably 30 to 150 μm. When the thickness is 20 μm or more, durability is more excellent. When the thickness is 600 μm or less (especially 150 μm or less), flexibility is excellent.

  The ratio of the thickness of the first fabric 11a to the first electrode layer 11 [the first fabric 11a / the first electrode layer 11] is preferably from 0.2 to 0.95, more preferably from 0.3 to 0.95. 0.9, more preferably 0.4 to 0.85. When the above ratio is 0.2 or more, more conductive resin can be inserted between the cloths, and the durability is further improved. When the ratio is 0.95 or less, the durability is further improved.

  The coating of the first fabric 11a with the first conductive resin phase 11b includes impregnation with a composition for forming the conductive resin phase 11b and application of the composition, and the method of coating is not particularly limited. Known or common coating methods can be employed. Specifically, when a thermoplastic resin is used for coating the first cloth 11a with the first conductive resin phase 11b, the first conductive resin phase 11b is formed on one or both sides of the first cloth 11a. It can be performed by impregnating or applying a composition to be formed (for example, a composition containing the above-described thermoplastic resin and conductive agent) under heating or dissolved in a solvent, and then cooling or volatilizing the solvent. When a thermosetting resin is used, a composition for forming the first conductive resin phase 11b on one or both surfaces of the first fabric 11a (for example, a composition containing the thermosetting resin and a conductive agent) ) Is impregnated or applied, and then cured or vulcanized. At this time, the coating may be performed so that at least a part of the conductive fiber 111 is exposed on the surface. Covering refers to covering the fiber surface of the fabric. As a method of coating, for example, a conductive resin is directly impregnated or applied to a cloth, a conductive resin sheet is placed on the cloth and permeated into a fiber surface by a press or the like, and / or continuously using an extruder. A method of infiltrating into the fiber surface of the fabric is exemplified.

(Second electrode layer)
The second electrode layer 12 is a sheet including a second fabric 12a using the conductive fibers 121 and a second conductive resin phase 12b. Thereby, the door pinch detection device of the present invention using the laminate 10 is more excellent in durability. The second conductive resin phase 12b forms a part of the conductive fiber 121 on the side opposite to the side having the conductive resin layer 13 of the second electrode layer 12 (see FIG. 1A and FIG. 1B). The second fabric 12a is covered so as to be exposed from the surface 12f on the (side) side. Note that, similarly to the first electrode layer 11, the conductive fiber 121 does not need to be exposed from the surface 12 f, and is detected as the conductive fiber 121 by, for example, being exposed from the side surface of the second electrode layer 12. The container may be electrically connected. In the second electrode layer 12, the second cloth 12a is a cloth composed of the conductive fibers 121, that is, a cloth in which the conductive fibers 121 are entirely used. The conductive fiber 121 may be a fiber made of a conductive substance, a fiber in which an insulating fiber is coated with a conductive substance, or a cloth formed from the conductive fiber and / or the insulating fiber. May be plated or vapor-deposited with a metal. Further, the conductive fiber 121 may be a conductive fiber obtained by a combination of these. The second fabric 12a may use only one kind of conductive fiber or two or more kinds of conductive fibers. Examples of the second fabric 12a include a woven fabric, a knitted fabric, a nonwoven fabric, a felt, and a paper using the conductive fiber 121.

  As the conductive fibers 121, those described for the above-described conductive fibers 111 can be used. The conductive fiber 111 and the conductive fiber 121 may be the same or different.

  As the second conductive resin phase 12b, the one described for the first conductive resin phase 11b can be used. Note that the first conductive resin phase 11b and the second conductive resin phase 12b may be the same or different. The second conductive resin phase 12b may contain a conductive agent in order to obtain a desired electric resistance value. Examples of the conductive agent include those exemplified as the conductive agent which may be contained in the first conductive resin phase 11b. Above all, carbon black is preferable from the viewpoint that a desired electrical resistance value is easily obtained because there are many types.

  The second conductive resin phase 12b may include those exemplified as other components that may be included in the first conductive resin phase 11b.

  The thickness of the second electrode layer 12 (excluding the exposed portions of the conductive fibers 121) is, for example, 20 to 600 μm, preferably 25 to 200 μm, and more preferably 30 to 150 μm. When the thickness is 20 μm or more, durability is more excellent. When the thickness is 600 μm or less (especially 150 μm or less), flexibility is excellent.

  The ratio of the thickness of the second fabric 12a to the second electrode layer 12 [the second fabric 12a / the second electrode layer 12] is preferably from 0.2 to 0.95, more preferably from 0.3 to 0.95. 0.9, more preferably 0.4 to 0.85. When the above ratio is 0.2 or more, more conductive resin can be inserted between the cloths, and the durability is more excellent. When the above ratio is 0.95 or less, the durability is further improved.

  The coating of the second fabric 12a with the second conductive resin phase 12b can be performed in the same manner as the above-described coating of the first fabric 11a with the first conductive resin phase 11b.

(Conductive resin layer)
The conductive resin layer 13 is a pressure-sensitive conductive resin layer whose electric resistance changes according to the applied pressure. The conductive resin layer 13 contains, for example, a resin constituting the conductive resin layer 13 and a conductive agent. Examples of the resin forming the conductive resin layer 13 include thermosetting resins and thermoplastic resins exemplified as the resin forming the conductive resin phase 11b. Examples of the conductive agent include those exemplified as the conductive agent that the first conductive resin phase 11b may contain. Above all, carbon black is preferable from the viewpoint that a desired electrical resistance value is easily obtained because there are many types.

  As the resin constituting the conductive resin layer 13, a resin having an affinity for the resin constituting the first conductive resin phase 11 b and the resin constituting the second conductive resin phase 12 b is used. Is preferred. For example, with respect to a conductive resin containing a polar urethane resin as a main component, by using acrylonitrile-butadiene rubber having the same polarity, an interlayer (an interlayer between the first electrode layer 11 and the conductive resin layer 13, Adhesion between the second electrode layer 12 and the conductive resin layer 13) is improved. As a result, the reproducibility of the change in the electric resistance value with respect to the repeated compression deformation becomes more excellent. In addition, when isoprene rubber, butadiene rubber, or natural rubber having excellent rebound resilience is used, excellent reproducibility and hysteresis of a change in electric resistance value with respect to compression deformation become favorable.

  The conductive resin layer 13 is preferably a foamed layer. In this case, the door pinch detection device of the present invention is more flexible. In addition, at the time of repeated compressive deformation, the contact area between the electrode layer and the conductive resin layer due to one end of the conductive resin layer 13 against the first electrode layer 11 or the second electrode layer 12 at the time of a minute load is reduced. Variations can be reduced. Therefore, it is possible to detect a pressure excellent in reproducibility of an electric resistance value, which is a detection signal, under a small load with respect to repeated compressive deformation.

  The conductive resin layer 13 may include those exemplified as other components that may be included in the first conductive resin phase 11b.

  The thickness of the conductive resin layer 13 is, for example, 10 to 2000 μm, preferably 20 to 1000 μm, and more preferably 50 to 200 μm. When the thickness is 10 μm or more, the pressure sensitivity is more excellent. When the thickness is 2000 μm or less (especially 200 μm or less), flexibility is more excellent.

  The conductive resin layer 13 can be formed by applying a composition constituting the conductive resin layer 13 to one surface of the first electrode layer 11 or the second electrode layer 12 and volatilizing a solvent. Alternatively, the above-described composition may be applied to another substrate in advance, and a conductive resin layer 13 formed by volatilization of a solvent may be attached to one surface of the first electrode layer 11 or the second electrode layer 12. When the conductive resin layer 13 is a foamed layer, after applying the composition, a foamed structure is formed by a known or commonly used foaming method such as physical foaming by mechanical stirring or chemical foaming using a chemical foaming agent. can do.

(Dielectric layer)
The dielectric layer 14 only needs to have a property as a dielectric, but preferably has a property in which pressure is easily transmitted to the first electrode layer 11 when pressure is applied to the surface of the dielectric layer 14. . As a material for forming the dielectric layer 14, a known or common material can be used, and examples thereof include a resin. Examples of the resin include those exemplified and described as the resin constituting the first conductive resin phase 11b. Above all, from the viewpoint that the elastic modulus is high and pressure is easily transmitted to the first electrode layer 11, and from the viewpoint of excellent abrasion resistance and weather resistance for protecting the sensor, a resin elastomer (a thermoplastic resin elastomer or a thermosetting resin elastomer) is used. Is preferred. In addition, depending on the application, the dielectric layer 14 may be required to have flame retardancy. In this case, it is easy to add a flame retardant, for example, to impart flame retardancy. The above materials may be used alone or in combination of two or more.

  The thickness of the dielectric layer 14 is, for example, 100 to 3000 μm, and preferably 200 to 2000 μm. When the thickness is 100 μm or more, durability is more excellent. When the thickness is 3000 μm or less, pressure is easily transmitted to the first electrode layer 11.

  The total thickness of the laminate 10 is preferably from 250 to 4400 μm, and more preferably from 310 to 2500 μm. When the total thickness is 4400 μm or less, flexibility is excellent while durability is excellent.

[Second aspect]
FIGS. 2A and 2B are schematic diagrams showing a second mode which is an embodiment of the above-mentioned laminated body in the door jam detector of the present invention, wherein FIG. 2A is a perspective view and FIG. 2B is II in FIG. -II 'sectional drawing is shown, respectively. The stacked body 20 shown in FIG. 2 has the same configuration as that of the first embodiment except that the second electrode layer 22 is used instead of the second electrode layer 12, and the preferable configuration is also the same as that of the first embodiment. It is. In the second aspect, since the cloth using the conductive fiber is used for the first and second electrode layers with the sheet covered with the conductive resin phase, the flexibility and the flexibility are higher than in the first aspect. Superior in durability.

(Second electrode layer)
The second electrode layer 22 is a sheet including a second fabric 22a using the conductive fibers 221 and a second conductive resin phase 22b. The conductive resin phase 22b covers the second cloth 22a. The second cloth 22a is a cloth composed of the conductive fiber 221 and the insulating fiber 222, that is, a cloth partially using the conductive fiber 221. By using the conductive fibers 221 for the second fabric 22a in part, the insulating fibers 222 that are more flexible than the conductive fibers 221 can be used for the second fabric 22a. More flexible. The conductive fiber 221 may be a fiber made of a conductive substance, or a fiber in which an insulating fiber is coated with a conductive substance, and a cloth formed from the conductive fiber and / or the insulating fiber. May be plated or vapor-deposited with a metal. Further, the conductive fiber 221 may be a conductive fiber obtained by a combination of these. As the second fabric 22a, only one kind of conductive fiber may be used, or two or more kinds may be used.

  The second electrode layer 22 is a sheet in which a second fabric 22a is covered with a second conductive resin phase 22b. Since the second fabric 22a is coated with the conductive resin phase 22b, the durability is superior to that of the first embodiment even when a fabric using conductive fibers is used as the electrode layer. At least a portion of the conductive fiber 221 is exposed from the surface 22f of the second electrode layer 22 on the side opposite to the side having the conductive resin layer 13 (the lower side in FIGS. 2A and 2B). are doing. In the second electrode layer 22, at least a portion of the conductive fiber 221 is exposed from the second electrode layer 22, so that the second electrode layer can function as an electrode. Note that, similarly to the first electrode layer 11, the conductive fiber 221 does not need to be exposed from the surface 22f, and may be detected as the conductive fiber 221 by, for example, being exposed from the side surface of the second electrode layer 22. The container may be electrically connected.

  As shown in FIG. 2A, in the second electrode layer 22, in the second cloth 22 a, a plurality of conductive fibers 221 are parallel to one another at equal intervals in a cloth composed of insulating fibers 222. (Stripes). The conductive fibers 221 in the second fabric 22a are arranged in a direction (cross shape) perpendicular to one direction in which the conductive fibers 111 in the first fabric are arranged. Thereby, when a pressure is applied, the first electrode layer 11 and the second electrode layer 22 are easily energized, and the pressure detection becomes easier. Further, the detection of the pressed position is also facilitated. The fabric using the conductive fibers 221 arranged as described above can be obtained by weaving as a weft or a warp constituting a woven fabric, or as a yarn constituting a knitted fabric of a knitted fabric.

  As the conductive fiber 221, the conductive fiber 111 described above can be used. Note that the conductive fiber 111 and the conductive fiber 221 may be the same or different.

  As the second conductive resin phase 22b, the one described for the first conductive resin phase 11b can be used. The first conductive resin phase 11b and the second conductive resin phase 22b may be the same or different. In addition, the second conductive resin phase 22b may contain a conductive agent in order to obtain a desired electric resistance value. Examples of the conductive agent include those exemplified as the conductive agent which may be contained in the first conductive resin phase 11b. Above all, carbon black is preferable from the viewpoint that a desired electrical resistance value is easily obtained because there are many types.

  The second conductive resin phase 22b may include those exemplified as other components that may be included in the first conductive resin phase 11b.

  The thickness of the second electrode layer 22 (excluding the exposed portions of the conductive fibers 221) is, for example, 20 to 600 μm, preferably 25 to 200 μm, and more preferably 30 to 150 μm. When the thickness is 20 μm or more, durability is more excellent. When the thickness is 600 μm or less (especially 150 μm or less), flexibility is excellent.

  The ratio of the thickness of the second fabric 22a to the second electrode layer 22 [the second fabric 22a / the second electrode layer 22] is preferably from 0.2 to 0.95, more preferably from 0.3 to 0.95. 0.9, more preferably 0.4 to 0.85. When the above ratio is 0.2 or more, more conductive resin can be inserted between the cloths, and the durability is more excellent. When the above ratio is 0.95 or less, the durability is further improved.

  The coating of the second fabric 22a with the second conductive resin phase 22b can be performed in the same manner as the above-described coating of the first fabric 11a with the first conductive resin phase 11b.

  The total thickness of the laminate 20 is preferably from 250 to 4400 μm, more preferably from 310 to 2500 μm. When the total thickness is 4400 μm or less, flexibility is excellent while durability is excellent.

[Third embodiment]
FIGS. 3A and 3B are schematic diagrams showing a third mode which is an embodiment of the above-mentioned laminated body in the door jam detector of the present invention, wherein FIG. 3A is a perspective view, and FIG. 3B is III in FIG. -III 'sectional drawing is shown, respectively. The laminated body 30 shown in FIG. 3 has the same configuration as that of the first embodiment except that the first electrode layer 31 is used instead of the first electrode layer 11, and the preferable configuration is also the same as that of the first embodiment. It is.

(First electrode layer)
The first electrode layer 31 is a sheet including a first fabric 31a using the conductive fibers 311 and a first conductive resin phase 31b. In the first conductive resin phase 31b, a part of the conductive fiber 311 is formed on the dielectric layer 14 side of the first electrode layer 31 (the side opposite to the side having the conductive resin layer 13) (FIG. ) And (b), the first fabric is covered so as to be exposed from the surface. Note that, like the first electrode layer 11, the conductive fiber 311 does not need to be exposed from the surface of the first electrode layer 31. For example, the conductive fiber 311 may be exposed from the side surface of the first electrode layer 31. The conductive fiber 311 and the detector may be electrically connected. In the first electrode layer 31, the first cloth 31a is a cloth composed of the conductive fibers 311, that is, a cloth in which the conductive fibers 311 are entirely used. The conductive fiber 311 may be a fiber made of a conductive substance, a fiber in which an insulating fiber is coated with a conductive substance, or a cloth formed from the conductive fiber and / or the insulating fiber. May be plated or vapor-deposited with a metal. Further, the conductive fiber 311 may be a conductive fiber obtained by a combination thereof. As the first fabric 31a, only one kind of conductive fiber may be used, or two or more kinds may be used. Examples of the first fabric 31a include a woven fabric, a knitted fabric, a nonwoven fabric, a felt, and a paper using the conductive fiber 311.

  As the conductive fibers 311, those described for the above-described conductive fibers 111 can be used. Note that the conductive fiber 311 and the conductive fiber 121 may be the same or different.

  As the first conductive resin phase 31b, the one described for the first conductive resin phase 11b can be used. The first conductive resin phase 31b and the second conductive resin phase 12b may be the same or different. In addition, the first conductive resin phase 31b may contain a conductive agent in order to obtain a desired electric resistance value. Examples of the conductive agent include those exemplified as the conductive agent which may be contained in the first conductive resin phase 11b. Above all, carbon black is preferable from the viewpoint that a desired electrical resistance value is easily obtained because there are many types.

  The first conductive resin phase 31b may include those exemplified as other components that may be included in the first conductive resin phase 11b.

  The thickness of the first electrode layer 31 (excluding the exposed portions of the conductive fibers 311) is, for example, 20 to 600 μm, preferably 25 to 200 μm, and more preferably 30 to 150 μm. When the thickness is 20 μm or more, durability is more excellent. When the thickness is 600 μm or less (especially 150 μm or less), flexibility is excellent.

  The coating of the first fabric 31a with the first conductive resin phase 31b can be performed in the same manner as the above-described coating of the first fabric 11a with the first conductive resin phase 11b.

  The total thickness of the laminate 30 is preferably from 250 to 4400 μm, and more preferably from 310 to 2500 μm. When the total thickness is 4400 μm or less, flexibility is excellent while durability is excellent.

[Modification]
FIG. 4 shows a schematic view (perspective view) of a modified example of the laminate 10 in the first embodiment. The laminated body 10 ′ shown in FIG. 4 has the same configuration as that of the first embodiment except that the second electrode layer 12 is partially provided not in the entire plane but in the plane. This is the same as the embodiment. Specifically, the second electrode layer 12 has a rectangular parallelepiped second electrode layer 12 formed on the conductive resin layer 13 along the length direction of the conductive fibers 111 arranged in parallel. Is different from the laminate 10 in that a plurality of coatings are applied in parallel at equal intervals. That is, in the stacked body 10 ′, the plurality of second electrode layers 12 are arranged in a direction (cross shape) perpendicular to one direction in which the plurality of conductive fibers 111 are arranged.

  FIG. 4 shows a modification in which the second electrode layer 12 in the laminate 10 shown in FIG. 1 is partially provided, but the first electrode layer 11 in the laminate 10 shown in FIG. The first electrode layer 11 and / or the second electrode layer 22 in the laminate 20 shown in FIG. 3, the first electrode layer 31 and / or the second electrode layer 12 in the laminate 30 shown in FIG. 3, and FIG. Similarly to the second electrode layer 12, the first electrode layer 11 in the stacked body 10 'may be partially provided in the planar direction. However, in the case where the electrode layer is partially provided, it is preferable that one of the first electrode layer and the second electrode layer is partially provided from the viewpoint of excellent durability. When used as a detection device, it is preferable to provide a structure in which an inner electrode layer (that is, a side opposite to the side to which pressure is applied) is partially provided.

  In each of the laminates shown in FIGS. 1 to 4, the first electrode layer is formed of a first fabric using conductive fibers and a first conductive resin phase covering the first fabric. The second electrode layer may be a known or commonly used electrode. Examples of such a second electrode layer include a metal foil such as an aluminum foil and a copper foil. Also in this case, the second electrode layer may be provided on the entire surface of the conductive resin layer 13 or may be provided partially.

  FIG. 5 shows an embodiment of the door pinch detection device of the present invention. Although the door pinch detection device of the present invention shown in FIG. 5 uses the laminate 10 in the first embodiment shown in FIG. 1, the laminate 20, the laminate 30, and the laminate 10 'are also used. It can be used similarly. The door pinch detection device shown in FIG. 5 is configured such that the first electrode layer 11 and the detector 40 outside the laminate 10 and the second electrode layer 12 and the detector 40 in the laminate 10 are electrically connected to each other by the wiring 41. Connected. In the wiring 41, the conductive fibers 11 a in the first electrode layer 11 and the conductive fibers 12 a in the second electrode layer 12 are electrically connected by the wiring 41. The wiring 41 may be connected to the detector 40 via an amplifier for amplifying a current. When no pressure is applied to the first electrode layer 11 and the second electrode layer 12, no current flows or a small amount of current flows, and the first electrode layer 11 and the second electrode layer When pressure is applied to the laminate 12 in the thickness direction of the laminate 10, the conductive resin layer 13 is distorted according to the magnitude of the pressure, and for example, the number of contacts of the conductive agent in the conductive resin layer 13 is reduced. As a result, the current flowing between the first electrode layer 11 and the second electrode layer increases stepwise. The door pinch detection device of the present invention uses a resistance-type pressure-sensitive sensor, and such a principle facilitates stepwise pressure detection from the beginning of a pressure load. For this reason, the door pinch detection device of the present invention temporarily generates cracks and the like as compared with the case of using a conventional pressure-sensitive sensor that detects a pressed state by detecting a pressure change in an inner space of a door tip rubber or a door pocket rubber. Even in this case, the influence on the detectability is extremely small, and the detectability is not extremely reduced.

  INDUSTRIAL APPLICABILITY The door pinch detection device of the present invention is used to detect a door pinch state in which a foreign object is pinched when a door that can be opened and closed is opened or closed. For example, when the door is opened, a foreign object is caught in the gap between the door pocket opening and the door, or when the door is closed, a foreign object is caught between the rubber door tips of a pair of doors. When the door is closed, it is used as a door pinch detecting device for detecting a state in which a foreign object is pinched between the door tip rubber and the door pocket rubber or the wall. When the door pinch detection device of the present invention is used to detect a door pinch state in which a foreign object is pinched between the door rubbers of a pair of doors when the door is closed, the stack (pressure-sensitive sensor portion) in the door pinch detection device of the present invention is used. ) Is preferably provided on the door rubber. When the door pinch detection device of the present invention is used to detect a door pinch state in which a foreign object is caught in the gap between the door pocket opening and the door when the door is opened, the stack (pressure-sensitive) in the door pinch detection device of the present invention is used. It is preferable to provide the sensor portion) on the door pocket rubber.

  Examples of the door using the door pinch detection device of the present invention include a door using a known or commonly used door pinch detection device. For example, a vehicle door, an automatic door, a station platform door, an elevator door, and the like can be given. Examples of the vehicle door include doors for train customers to get on and off, automobile doors, and airplane doors. The door pinch detection device of the present invention has excellent durability and is hardly damaged even when repeatedly opened and closed. Therefore, a vehicle door is particularly preferable.

[Door pocket rubber]
The door rubber in which the laminate is provided on a rubber layer (the door rubber of the present invention) and the door rubber in which the laminate is provided on a rubber layer (the door rubber of the present invention) will be described. FIG. 6 shows a perspective view of the vicinity of the door pocket opening of the vehicle door device when the door is opened. FIG. 6 is a schematic view showing an embodiment of a vehicle door device using the door tip rubber of the present invention and the door pocket rubber of the present invention. As shown in FIG. 6, the vehicle door device includes a vehicle door 50 slidably provided in the opening and closing direction and a door pocket 60. Although not shown, the vehicle door device is provided with a pair of door rubbers 52 facing each other in the opening / closing direction of the vehicle door. FIG. 6 shows one of the pair of vehicle door devices.

  The door pocket 60 has an inner plate 61 arranged inside the vehicle and an outer plate 62 arranged outside the vehicle. An opening 64 is formed between the inner plate 61 and the outer plate 62. The width of the opening 64 is formed larger than the thickness of the door plate 51 constituting the vehicle door 50. As a result, a vehicle interior gap 64a is formed between the inner plate 61 and the door plate 51. On the other hand, a vehicle-side gap is also formed between the outer plate 62 and the door plate 51 (not shown).

  In the inner plate 61, a door pocket rubber 63a is formed in a rubber mounting groove having a substantially rectangular cross section formed by cutting out a corner portion facing the opening 64. Similarly, on the outer plate 62, a door pocket rubber 63b is formed in a rubber mounting groove having a substantially rectangular cross section formed by cutting out a corner portion facing the opening 64. The outer plate 62 may not have the door pocket rubber 63b. The door pocket rubber 63a plays a part of a role of detecting that a foreign object is in a door-jamming state in the vehicle interior gap 64a. The same applies to the door rubber 63b.

  The door pocket rubber 63 has a hollow main body 632 made of a rubber material and a pressure-sensitive sensor 633. The door pocket rubber 63 indicates both the door pocket rubbers 63a and 63b. The pressure-sensitive sensor 633 is a laminate including a dielectric layer, a first electrode layer, a conductive resin layer, and a second electrode layer in this order in the door jam detector of the present invention. , 30, 10 'etc. can be used. The pressure-sensitive sensor 633 is attached to the outer surface of the main body 632 such that the dielectric layer is on the outside and the second electrode layer is on the inside. That is, the door pocket rubber 63 includes a laminate (pressure-sensitive sensor 633) in which a dielectric layer, a first electrode layer, a conductive resin layer, and a second electrode layer are laminated in this order, and a second laminate of the laminate. And a rubber layer (main body 632) provided on the side of the electrode layer. Thereby, the door pocket rubber 63 is excellent in durability and durability because it has the door pinch detection device of the present invention, which is excellent in flexibility and durability and can easily detect the pressure stepwise from the initial stage of the pressure load. Occasionally, the state of pinching of a door in which a foreign object is trapped in the gap between the door pocket opening and the door can be accurately detected over a long period.

  The main body 632 has a substantially trapezoidal cross section, and the door pocket rubber 63 has a substantially trapezoidal cross section as shown in FIG. It is in a state protruding toward the 50 side. Further, the door pocket rubber 63 may be provided over the entire length in the height direction of the inner plate 61 and the outer plate 62 of the door pocket 60, or may be provided over the entire length in the height excluding the upper end portion and the lower end portion. Note that the cavity 631 may not be provided. As the rubber constituting the main body 632, for example, a rubber obtained by disposing a highly durable chloroprene rubber on the surface of a natural rubber as a base material may be mentioned. The cross-sectional shape and size of the door pocket rubber 63 are not particularly limited, and the design can be appropriately changed. The pressure-sensitive sensor 633 is attached along the height direction on the entire outer surface of a portion of the main body 632 that is not covered by the inner plate 61. In the pressure-sensitive sensor 633, the dielectric layer is attached to the outside, and the second electrode layer is attached to the inside, that is, the outside surface of the main body 632. The pressure sensor 633 may not be provided on the entire outer surface of the main body 632 where the inner plate 61 is not covered, and may be provided on a part thereof. The pressure sensor 633 may be provided with a plurality of pressure sensors 633 extending in the height direction on the outer surface of the main body 632 intermittently along the horizontal direction, for example, and the pressure sensors 633 extending in the horizontal direction. May be provided intermittently along the height direction.

  Although not shown, a detector provided with an amplifier is provided as necessary, and a first electrode layer and a detector outside the pressure-sensitive sensor 633 of the pressure-sensitive sensor 633, and a second electrode layer and the above-described detector are provided. Are electrically connected by wiring.

  When a foreign object is caught in the inside gap 64a formed between the inner plate 61 and the door plate 51 or the outside gap formed between the outer plate 62 and the door plate 51 when the vehicle door 50 is opened. There is. At this time, when the pressure-sensitive sensor 633 on the surface of the door pocket rubber 63 is pressed by a foreign substance, a current flows through the detector, and the pinching of the door is detected.

[Door rubber]
As shown in FIG. 6, the vehicle door 50 has a flat door plate 51 and a door rubber 52 provided at a front end of the door plate 51 in the opening direction of the door plate 51. FIG. 7 is an exploded perspective view showing a door portion of the vehicle door device provided with the door rubber 52. As shown in FIG. 7, a fitting concave portion 511 having a substantially rectangular shape in a cross section is provided at a door tip portion of the door plate 51 constituting the vehicle door 50, that is, at a front end portion in the closing direction, It is formed to extend in a direction orthogonal to the door closing direction. The fitting recess 511 is formed such that a groove width in the opening 512 is smaller than a groove width in the inside thereof.

  The door rubber 52 (door elastic member) is attached to the fitting recess 511. The door rubber 52 is a long member made of a rubber material and has a hollow main body 521 and a fitting projection 522 protruding from the main body 521. Here, the main body 521 has a substantially semicircular cross section, and a hollow 521a having a substantially semicircular cross section is formed so as to penetrate the inside thereof in the longitudinal direction. On the other hand, the fitting protrusion 522 has a substantially rectangular shape in a transverse cross section, and is formed to have a size equal to or slightly larger than that of the fitting recess 511 of the door plate 51.

  The door rubber 52 has a hollow main body 521 made of a rubber material, and a pressure-sensitive sensor 523 attached to the entire outer surface of the main body 521 along the height direction. The pressure-sensitive sensor 523 is a laminated body including a dielectric layer, a first electrode layer, a conductive resin layer, and a second electrode layer in this order in the door jam detector of the present invention. , 30, 10 'etc. can be used. The pressure-sensitive sensor 523 is attached to the outer surface of the main body 521 such that the dielectric layer is on the outside and the second electrode layer is on the inside. That is, the door tip rubber 52 is composed of a laminate (pressure-sensitive sensor 523) in which a dielectric layer, a first electrode layer, a conductive resin layer, and a second electrode layer are laminated in this order, and a fourth layer of the laminate. And a rubber layer (main body portion 521) provided on the second electrode layer side. Accordingly, the door rubber 52 has excellent flexibility and durability, and is equipped with the door pinch detection device of the present invention in which stepwise pressure detection is easy from the initial stage of the pressure load. It is possible to accurately detect a state in which a foreign object is caught between the door rubbers 52 of a pair of doors at the time of closing the door. The pressure-sensitive sensor 523 may not be provided on the entire outer surface of the main body 521, and may be provided on a part thereof. The pressure-sensitive sensor 523 may be, for example, a portion having an arc shape on the outer surface of the main body 521, and may be attached only to the center in the thickness direction of the door plate 51. A plurality may be attached intermittently along the height direction. Further, the cavity 521a may not be provided.

  A detector 513 provided with an amplifier as necessary is installed on the upper part of the door plate 51 in the height direction. The first electrode layer in the pressure-sensitive sensor 523 and the detector 513 outside the pressure-sensitive sensor 523 and the second Are electrically connected to the detector 513 by wiring (not shown).

  When the vehicle door 50 is closed, foreign matter such as belongings of a passenger may be caught between a pair of opposed rubber doortips 52 that constitute the vehicle door 50. In this case, the pair of door tip rubbers 52 located on both sides of the foreign matter come into contact with each other when the door is normally closed when the pressure-sensitive sensor 523 on the surface is pressed by the foreign matter. When a current different from the current generated at this time flows through the detector, the door jam is detected.

  In addition, as a vehicle including the door tip rubber of the present invention and the door pocket rubber of the present invention, the vehicle suitable for adopting the door pinch detection device of the present invention is preferably an automobile or a train, and more preferably a train.

10, 20, 30, 10 'Laminated body 11, 31 First electrode layer 12, 22 Second electrode layer 11a, 31a First fabric 12a, 22a Second fabric 111, 121, 221, 311 Conductive fiber 112, 222 Insulating fiber 11b, 31b First conductive resin phase 12b, 22b Second conductive resin phase 13 Conductive resin layer 14 Dielectric layer 40 Detector 41 Wiring 50 Vehicle door 51 Door plate 511 Fitting recess 512 Opening part 513 Detector 52 Door tip rubber 521 Body part 521a Cavity 522 Fitting convex part 523 Pressure sensitive sensor 60 Door bag 61 Inner plate 62 Outer plates 63a, 63b Door bag rubber 631 cavity 632 Body part 633 Pressure sensitive sensor 64 Opening 64a Car interior gap

Claims (6)

A door pinch detection device for detecting that a foreign substance is pinched when the door provided to be openable or closable is opened or closed,
A dielectric layer, a first electrode layer, a conductive resin layer, and a second electrode layer include a laminate in which the layers are laminated in this order, and the first electrode layer is a first fabric using conductive fibers. And a first conductive resin phase covering the first fabric.   The door pinch according to claim 1, wherein the second electrode layer is a sheet including a second fabric using conductive fibers and a second conductive resin phase covering the second fabric. Detection device.   The door pinch detection device according to claim 1 or 2, wherein the first fabric is a fabric partially using the conductive fiber.   The door pinch detection device according to any one of claims 1 to 3, wherein the conductive resin layer is a foamed layer.   A laminate in which a dielectric layer, a first electrode layer, a conductive resin layer, and a second electrode layer are laminated in this order, and a rubber layer provided on the second electrode layer side of the laminate. Wherein the first electrode layer is a sheet including a first fabric using a conductive fiber and a first conductive resin phase covering the first fabric; .   A laminate in which a dielectric layer, a first electrode layer, a conductive resin layer, and a second electrode layer are laminated in this order, and a rubber layer provided on the second electrode layer side of the laminate. A door pocket rubber for a vehicle, wherein the first electrode layer is a sheet including a first fabric using a conductive fiber and a first conductive resin phase covering the first fabric.

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