JP2019001249A - Seat Belt Device - Google Patents

Abstract

To provide a seat belt device which can perform electric power supply while suppressing wear of a conductive yarn.SOLUTION: A seat belt device 10 comprises: a seat belt 12 which is configured by use of a webbing 1 in which a warp and a weft 4 are woven so that said warp and weft so extend as to be orthogonal to each other, the warp includes a conductive yarn 2 and a non-conductive yarn 3, and the non-conductive yarn 3 is thicker than the conductive yarn 2; a retractor 13 which performs taking-up of the seat belt 12; a buckle 14 which is fixed to a vehicle; a tongue 15 which is provided on the seat belt 12, and is engaged with the buckle 14; a belt anchor 30 in which an opening 31, in which a lock body attached to a vehicle body or a seat is inserted, and an opening 32, in which the seat belt 12 is inserted, are formed; and electric power supply means which performs electric power supply to the conductive yarn 2 at a belt anchor part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a seat belt device provided with a seat belt including a conductive yarn.

  Conductive fabrics containing conductive yarn are known. This conductive fabric is used, for example, as a seat cover for a vehicle seat provided with a seat heater and a seating sensor. Patent Document 1 discloses a conductive fabric including ultrafine fibers having a single fiber diameter of 10 to 1000 nm and conductive fibers having a single fiber diameter of more than 1000 nm.

  The use of a conductive fabric for webbing that functions as a long occupant restraint belt (seat belt) that restrains an occupant in a vehicle has been studied. The webbing travels in a state of sliding contact with various members such as a webbing guide when the webbing is pulled out from the winding device (retractor) or wound into the winding device. When a conductive fabric as described in Patent Document 1 is used for such webbing, the conductive fiber having a large single fiber diameter may slide and wear with the webbing guide or the like, and may be disconnected (cut). .

  Patent Document 2 discloses a belt load sensor that detects electrical discontinuity by a sensor when a conductive fiber woven into a seat belt is broken, and informs a driver that an excessive load is applied to the seat belt. It is disclosed. However, Patent Document 2 does not disclose how the conductive fibers are woven. Also, no specific configuration is disclosed for the power supply means.

JP 2010-7201 A US Pat. No. 6,211,793 European Patent No. 2399477 US Pat. No. 7,752,925

  An object of this invention is to provide the seatbelt apparatus which can supply electric power, suppressing abrasion of a conductive yarn.

  The seat belt device of the present invention is constructed by using a webbing in which warps and wefts are woven so as to extend orthogonal to each other, the warps include conductive yarns and non-conductive yarns, and the non-conductive yarns are thicker than the conductive yarns. Seat belt, a retractor that winds up the seat belt, a buckle fixed to the vehicle, a tongue that is provided on the seat belt and engages the buckle, and a latch that is attached to the vehicle body or the seat A belt anchor having a first opening into which a body is inserted and a second opening through which the seat belt is inserted is formed, and a power feeding unit that feeds power to the conductive yarn at the belt anchor portion.

In one aspect of the present invention, the power feeding means is a film electrode electrically connected to a power source,
The film electrode is sandwiched between seat belts that are folded back through the second opening. In this case, the film electrode may be sewn to the seat belt with a sewing thread. Further, the sewing thread may be a conductive thread.

  In one aspect of the present invention, the belt anchor is connected to a power source via a wiring, and the width of the second opening is larger than the width of the seat belt.

  In one aspect of the present invention, the belt anchor is connected to a power source via a wiring, and the belt anchor is further formed with a third opening through which the seat belt is inserted, and the second opening and The third opening extends along the seat belt width direction.

  In one aspect of the present invention, the power supply means is an electrode that protrudes from a pin and is electrically connected to a power source. The pin is in contact with the conductive yarn, and a gap between the warp and weft of the seat belt is formed. Has passed.

  In one aspect of the present invention, the power feeding unit is a power receiving device that receives power from a power source by wireless power transmission. In this case, the power receiving device may be disposed in a loop formed by further folding back the front end portion of the seat belt that has been folded through the second opening.

  The seat belt device of the present invention can supply power to the conductive yarn while suppressing wear of the conductive yarn.

It is a schematic structure figure of a seatbelt device concerning an embodiment. It is a perspective view of webbing concerning an embodiment. It is an enlarged plan view of webbing concerning an embodiment. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. It is the VV sectional view taken on the line of FIG. It is the VI-VI sectional view taken on the line of FIG. It is the VII-VII sectional view taken on the line of FIG. It is sectional drawing of the webbing which concerns on embodiment. It is sectional drawing of the webbing which concerns on another embodiment. It is sectional drawing which shows the connection state of an electric device and a conductive yarn. It is a perspective view of a belt anchor. It is a perspective view explaining how to attach a film electrode. It is a perspective view which shows the seatbelt which attached the film electrode. It is the XIV-XIV sectional view taken on the line of FIG. It is a perspective view of the belt anchor with which the seatbelt was inserted. It is the XVI-XVI sectional view taken on the line of FIG. It is a perspective view of the belt anchor with which the seatbelt was inserted. (A) (b) is a figure explaining the method of attaching an electrode to a seatbelt. (A) (b) is sectional drawing along the width direction of the seatbelt which attached the electrode. It is a perspective view explaining how to attach a power receiving apparatus. It is a perspective view explaining how to attach a power receiving apparatus.

  Embodiments of the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, a seat belt device 10 according to the present embodiment includes a seat belt 12 that restrains an occupant to a seat S, a retractor 13 that winds up the seat belt 12, and a seat belt 12 provided on the vehicle body side. A belt anchor 16 for guiding, a belt anchor 30 for fixing the seat belt 12 to the vehicle body side (vehicle body or the seat S), a buckle 14 disposed on a side surface of the seat S, a tongue 15 disposed on the seat belt 12, Is provided.

  The pillar P is disposed at a position adjacent to the seat S, the retractor 13 is disposed in the pillar P, and the belt anchor 16 is disposed on the surface of the pillar P. In the seat belt device 10, the passenger can be restrained to the seat S by the seat belt 12 by pulling out the seat belt 12 and fitting the tongue 15 to the buckle 14.

  2 is a perspective view of the webbing 1 constituting the seat belt 12, FIG. 3 is an enlarged plan view of the webbing, and FIGS. 4 to 7 are IV-IV line, VV line, and VI-VI of FIG. 3, respectively. It is a figure which shows a part of cross section along line VII-VII.

  The webbing 1 is made of a woven fabric in which warp yarns (warp yarns) and weft yarns (weft yarns) extend perpendicularly to each other, and is woven in, for example, 2/2 oblique weaving. One of the plurality of warps is a conductive yarn 2, and the other warp is a non-conductive yarn 3. The conductive yarn 2 is provided along the longitudinal direction of the webbing 1. The weft 4 is a non-conductive yarn.

  A method of weaving warp yarns (conductive yarn 2 and non-conductive yarn 3) and weft yarn 4 will be described with reference to FIG. The warp yarn repeatedly passes over the two wefts 4 and then passes under the two wefts 4. For example, the non-conductive yarn 3A passes over the wefts 4A and 4B and under the wefts 4C and 4D.

  The nonconductive yarn 3B adjacent to the nonconductive yarn 3A across the conductive yarn 2 passes over the weft 4A and then passes over the wefts 4B and 4C and over the wefts 4D and 4E. The nonconductive yarn 3C adjacent to the nonconductive yarn 3B passes under the weft 4A, and then passes over the wefts 4B and 4C and under the wefts 4D and 4E.

  The conductive yarn 2 extends between the two non-conductive yarns 3A, 3B, and the way of crossing with the weft 4 is one of the two non-conductive yarns 3A, 3B (in the example shown in FIG. It is the same as the conductive yarn 3A). That is, the conductive yarn 2 passes above the wefts 4A and 4B and below the wefts 4C and 4D.

  The conductive yarn 2 is a multifilament yarn obtained by twisting and converging a plurality of conductive filaments. As the conductive filament, for example, a polyester fiber, a nylon fiber, or the like coated with a metal such as copper by a vacuum deposition method or the like can be used. The thickness (fineness) of the conductive yarn 2 which is a multifilament yarn is 750 D or less.

  The non-conductive yarn 3 can be made of polyester fiber, nylon fiber or the like, and is thicker than the conductive yarn 2. The thickness (fineness) of the non-conductive yarn 3 is preferably 1.3 times or more, particularly about 2 to 6 times the thickness of the conductive yarn 2. For the weft 4, polyester fiber, nylon fiber or the like can be used, and the thickness (fineness) is about 250 to 1000D.

  Since the conductive yarn 2 is thinner than the non-conductive yarn 3, as shown in FIG. 4, at the intersection with the weft yarn 4A, the upper portion of the conductive yarn 2 is positioned lower than the upper portions of the adjacent non-conductive yarns 3A and 3B. is there. Further, as shown in FIG. 5, at the intersection of the conductive yarn 2 and the weft 4B, the upper portion of the conductive yarn 2 is higher than the upper portion of the nonconductive yarn 3A and the upper portion of the nonconductive yarn 3C adjacent to the nonconductive yarn 3B. Is also in a low position.

  When the upper surface side of the webbing 1 slides in contact with another member, the conductive yarn 2 is in the spaces S1 and S2 surrounded by the sliding surface L1, the nonconductive yarns 3A to 3C, and the weft yarns 4A and 4B. The upper portion of the conductive yarn 2 is not in contact with the member, or the frictional force can be suppressed even when in contact. Therefore, wear of the conductive yarn 2 is suppressed.

  As shown in FIG. 6, at the intersection of the conductive yarn 2 and the weft 4C, the lower portion of the conductive yarn 2 is higher than the lower portions of the adjacent non-conductive yarns 3A and 3B. Further, as shown in FIG. 7, at the intersection of the conductive yarn 2 and the weft 4D, the lower portion of the conductive yarn 2 is lower than the lower portion of the nonconductive yarn 3A and the lower portion of the nonconductive yarn 3C adjacent to the nonconductive yarn 3B. Is also in a high position.

  When the lower surface side of the webbing 1 slides in contact with another member, the conductive yarn 2 is in the spaces S3 and S4 surrounded by the sliding surface L2, the nonconductive yarns 3A to 3C, and the weft yarns 4C and 4D. The lower part of the conductive yarn 2 is not in contact with the member, or the frictional force can be suppressed even when it is in contact. Therefore, wear of the conductive yarn 2 is suppressed.

  In addition, since the conductive yarn 2 is a multifilament yarn in which a plurality of conductive filaments are converged, excellent conductivity can be obtained.

  In the example of FIG. 2, the conductive yarn 2 is provided at the center in the width direction orthogonal to the longitudinal direction of the webbing 1, but the position and number of the conductive yarns 2 are not limited to this. As described above, in protecting the conductive yarn 2 from friction with other members, the non-conductive yarn 3A, 3B adjacent to the conductive yarn 2 and the non-conductive yarn 3C adjacent to the non-conductive yarn 3B are used. Therefore, when a plurality of conductive yarns 2 are provided, it is preferable to arrange at least one non-conductive yarn 3 between the conductive yarns 2 and 2, and it is more preferable to arrange two or more non-conductive yarns 3.

  As shown in FIG. 8, the conductive yarn 2 may bite into two adjacent non-conductive yarns 3 </ b> A and 3 </ b> B, and the non-conductive yarns 3 </ b> A and 3 </ b> B may cover the conductive yarn 2. As shown in FIG. 9, the conductive yarn 2 may have a cross-sectional shape other than a circle.

  As shown in FIG. 1, the seat belt 12 is provided with an electric device 20 that is electrically connected to the conductive yarn 2. The electric device 20 is, for example, a microphone, a speaker, a biological sensor, a belt extension amount detection sensor, a heater material, a lashing belt weight detection sensor, or the like. FIG. 10 is a cross-sectional view illustrating an example of a contact state between the electric device 20 and the conductive yarn 2. Since the seat belt 12 suppresses the wear of the conductive yarn 2, the electric device 20 can be operated in a favorable environment.

  In the present embodiment, power is supplied to the conductive yarn 2 of the seat belt 12 by the power feeding means at the belt anchor portion (belt anchor 30 or its vicinity). As shown in FIG. 11, the belt anchor 30 is entirely formed of a flat metal plate, and is bent at a predetermined offset angle at an intermediate position in the vertical direction. An opening 31 through which a bolt for locking the belt anchor 30 to the vehicle body is inserted is formed below the belt anchor 30.

  In the upper part of the belt anchor 30, an opening 32 through which the seat belt 12 is inserted is formed elongated along the width direction (left-right direction). On the peripheral edge of the opening 32, a convex portion 32a raised in the thickness direction is provided.

  As shown in FIGS. 12 to 14, the seat belt 12 inserted through the opening 32 is folded back, and is sewn with the sewing thread 18 with the film electrode 40 serving as a power feeding unit interposed therebetween. The sewing thread 18 may be a conductive thread. The conductive thread 2 of the seat belt 12 is electrically connected to the wiring of the film electrode 40 directly or via the conductive sewing thread 18. Instead of the sewing thread 18, the film electrode 40 may be fixed between the seat belts 12 using a conductive adhesive.

  Thus, power can be supplied to the conductive yarn 2 of the seat belt 12 through the film electrode 40 from a power source (not shown) provided on the vehicle body side.

  As shown in FIG. 15, the wiring 41 is sandwiched between the bolt 42 and the belt anchor 30 for locking the belt anchor 30 to the vehicle body side, and the seat belt 12 is connected to the power supply 41 via the wiring 41 and the belt anchor 30. It is also possible to supply power to the conductive yarn 2. In this case, it is preferable that the width W2 of the opening 32 is larger than the width W1 of the seat belt 12. As a result, as shown in FIG. 16, the belt anchor 30, in particular, the convex portion 32a can easily come into contact with the seat belt 12, and the occurrence of poor conduction can be prevented.

  As shown in FIG. 17, two openings 32 and 33 through which the seat belt 12 is inserted may be formed in the upper part of the belt anchor 30 along the width direction. The opening 33 is formed elongated along the seat belt width direction, and extends in parallel (substantially parallel) with the opening 32. Between the opening 32 and the opening 33, a rod-like tie portion 34 that connects the left edge portion and the right edge portion of the belt anchor 30 is formed.

  The seat belt 12 is inserted into the opening 33 from the first surface (one surface) of the belt anchor 30 toward the second surface (the other surface), and then inserted into the opening 32 from the second surface toward the first surface. Then fold and sew. The seat belt 12 easily contacts the belt anchor 30, particularly the tie portion 34, and can prevent the occurrence of poor conduction.

  As shown in FIGS. 18A, 18B and 19A, 19B, the wiring 54 extending from the power source is connected, and the disk-like electrode 50a from which the pin 51a protrudes, or the elongated shape from which the pin 51b protrudes. Electric power may be supplied to the conductive yarn 2 of the seat belt 12 using the plate-like electrode 50b.

  By pressing the electrodes 50 a and 50 b from one surface of the seat belt 12, the pins 51 a and 51 b pass through the gap between the warp and weft of the seat belt 12 while contacting the conductive yarn 2. The pins 51a and 51b protruding to the other surface side of the seat belt 12 are fitted into the fitting holes 53a and 53b of the support members 52a and 52b, and fixed by caulking, welding, adhesion, screwing or the like. By using such electrodes 50a and 50b, it is possible to supply power to the conductive yarn 2 not only in the vicinity of the belt anchor 30 but also in a desired position of the seat belt 12.

  As shown in FIG. 20, the power supplied by wireless power transmission using the power receiving device 60 may be supplied to the conductive yarn 2 of the seat belt 12. The front end portion of the seat belt 12 that is inserted through the opening 32 and is folded back is further folded inward to form a loop 12a. The power receiving device 60 is fitted and stored in the loop 12a, and the seat belt 12 is sewn.

  As shown in FIG. 21, the power receiving device 60 may be sandwiched between the folded ribbons 70, and both ends of the ribbon 70 may be sandwiched between the seat belts 12 that are inserted through the openings 32 and folded, and then sewn. The ribbon 70 is provided with wiring for supplying the power received by the power receiving device 60 by wireless power transmission to the conductive yarn 2 of the seat belt 12.

  The above-described embodiment is an example of the present invention, and the present invention may be configured other than the above.

DESCRIPTION OF SYMBOLS 1 Webbing 2 Conductive thread 3, 3A, 3B, 3C Non-conductive thread 4, 4A, 4B, 4C, 4D, 4E Weft 10 Seat belt device 12 Seat belt 13 Retractor 14 Buckle 15 Tongue 18 Sewing thread 20 Electric device 30 Belt anchor 40 Film electrode 60 Power receiving device

Claims (9)

A seat belt in which the warp and the weft are woven so as to extend orthogonal to each other, the warp includes a conductive yarn and a non-conductive yarn, and the non-conductive yarn is configured using a webbing thicker than the conductive yarn;
A retractor for winding the seat belt;
A buckle fixed to the vehicle;
A tongue provided on the seat belt and engaged with the buckle;
A belt anchor having a first opening into which a locking body attached to a vehicle body or a seat is inserted, and a second opening through which the seat belt is inserted;
A power feeding means for feeding power to the conductive yarn in the belt anchor portion;
A seat belt device comprising: In claim 1, the power supply means is a film electrode electrically connected to a power source,
The seat belt device according to claim 1, wherein the film electrode is sandwiched between seat belts that are folded back through the second opening.   3. The seat belt device according to claim 2, wherein the film electrode is sewn to the seat belt by a sewing thread.   4. The seat belt device according to claim 3, wherein the sewing thread is a conductive thread. In Claim 1, the belt anchor is connected to a power source via wiring,
The width of the second opening is larger than the width of the seat belt. In Claim 1, the belt anchor is connected to a power source through a wiring, and the belt anchor is further formed with a third opening through which the seat belt is inserted,
The seat belt device according to claim 2, wherein the second opening and the third opening extend along a seat belt width direction. In claim 1, the power supply means is an electrode protruding from a pin and electrically connected to a power source,
The seat belt device according to claim 1, wherein the pin is in contact with the conductive yarn and passes through a gap between a warp and a weft of the seat belt.   2. The seat belt device according to claim 1, wherein the power feeding unit is a power receiving device that receives power from a power source by wireless power transmission.   9. The seat belt device according to claim 8, wherein the power receiving device is disposed in a loop formed by further folding back a leading end portion of the seat belt that is folded through the second opening.

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