WO2009081909A1 - Pretensioner for vehicle seat - Google Patents

Pretensioner for vehicle seat Download PDF

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Publication number
WO2009081909A1
WO2009081909A1 PCT/JP2008/073335 JP2008073335W WO2009081909A1 WO 2009081909 A1 WO2009081909 A1 WO 2009081909A1 JP 2008073335 W JP2008073335 W JP 2008073335W WO 2009081909 A1 WO2009081909 A1 WO 2009081909A1
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WO
WIPO (PCT)
Prior art keywords
cylinder
cable
pretensioner
seat
piston
Prior art date
Application number
PCT/JP2008/073335
Other languages
French (fr)
Japanese (ja)
Inventor
Eiji Masutani
Original Assignee
Ts Tech Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ts Tech Co., Ltd. filed Critical Ts Tech Co., Ltd.
Publication of WO2009081909A1 publication Critical patent/WO2009081909A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
    • B60R22/4628—Reels with means to tension the belt in an emergency by forced winding up characterised by fluid actuators, e.g. pyrotechnic gas generators
    • B60R22/4633—Linear actuators, e.g. comprising a piston moving along reel axis and rotating along its own axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B60N2/4207—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats characterised by the direction of the g-forces
    • B60N2/4214—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats characterised by the direction of the g-forces longitudinal
    • B60N2/4221—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats characterised by the direction of the g-forces longitudinal due to impact coming from the front
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B60N2/427—Seats or parts thereof displaced during a crash
    • B60N2/42727—Seats or parts thereof displaced during a crash involving substantially rigid displacement
    • B60N2/42754—Seats or parts thereof displaced during a crash involving substantially rigid displacement of the cushion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B60N2/427—Seats or parts thereof displaced during a crash
    • B60N2/42727—Seats or parts thereof displaced during a crash involving substantially rigid displacement
    • B60N2/42754—Seats or parts thereof displaced during a crash involving substantially rigid displacement of the cushion
    • B60N2/42763—Seats or parts thereof displaced during a crash involving substantially rigid displacement of the cushion with anti-submarining systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B60N2/427—Seats or parts thereof displaced during a crash
    • B60N2/42772—Seats or parts thereof displaced during a crash characterised by the triggering system
    • B60N2/42781—Seats or parts thereof displaced during a crash characterised by the triggering system mechanical triggering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B60N2/427—Seats or parts thereof displaced during a crash
    • B60N2/42772—Seats or parts thereof displaced during a crash characterised by the triggering system
    • B60N2/4279—Seats or parts thereof displaced during a crash characterised by the triggering system electric or electronic triggering

Definitions

  • the present invention relates to an improvement of PCT / JP2008 / 052579 (hereinafter referred to as the previous invention), and when a large external force acts on the vehicle body due to a vehicle collision or the like, a movable member such as a seat bottom or a seat belt is moved.
  • the present invention relates to a pretensioner for protecting a seated person.
  • Patent Document 1 a seat belt pretensioner that quickly restrains a seated person by a seat belt by positively tensioning the seat belt at the time of a vehicle collision.
  • the pretensioner can restrain the seat occupant quickly and reduces undesired movement of the seat occupant.
  • an object of the present invention is to provide a pretensioner that overcomes the above problems.
  • Sectional drawing of a pretensioner Schematic which shows the movement state of the cylinder and piston of a pretensioner.
  • the perspective view of a seat pretensioner and a seat bottom frame The side view of the said seat bottom before a pretensioner act
  • Reference numeral 1 denotes a vehicle seat
  • 2 denotes a seat back of the vehicle seat
  • 3 denotes a seat bottom
  • 4 denotes a headrest provided on the upper portion of the seat back 2
  • 5 denotes a vehicle seat 1 It is a slide rail moved with respect to.
  • the vehicle seat 1 is provided with a pretensioner 10 that generates a large amount of gas with a gas generating agent and arbitrarily operates the movable member K of the vehicle seat.
  • the pretensioner 10 is provided with a piston 12 in a cylinder 11. One end of a wire cable 13 is connected to the piston 12, and the other end of the wire cable 13 is pulled out of the cylinder 11 from the insertion hole 15 of the guide portion 14 of the cylinder 11 and connected to an arbitrary locking portion T (FIG. 2). FIG. 9).
  • the wire cable 13 is constituted by a pair of the first cable 13A and the second cable 13B.
  • One end of either the first cable 13A or the second cable 13B is connected to the piston 12 side of the cylinder 11 provided with one pretensioner 10, and the other end of either the first cable 13A or the second cable 13B.
  • the cylinder 11 is movably attached to a predetermined fixed portion, and is configured such that the cylinder 11 and the piston 12 move in opposite directions by reaction forces.
  • the cylinder 11 is provided with a gas generator 16 for supplying a large amount of gas for moving the piston 12.
  • the configuration of the gas generator 16 is well known, and although not shown in the drawing, a gas generating agent is incorporated therein, a high pressure gas is generated by this gas generating agent, and the piston 12 is instantaneously moved by this gas pressure. To do.
  • the cylinder-side wire locking portion 17 has a cylindrical end piece 19 having a smaller diameter than the cylinder pipe 18 of the cylinder 11 and a predetermined length.
  • An annular groove 20 is formed on the outer peripheral surface of the end piece 19 over the entire circumference.
  • the end piece 19 is inserted into the end of the cylinder pipe 18, and the concave groove 20 and the end of the cylinder pipe 18 are overlapped and caulked and fixed.
  • Reference numeral 21 denotes a flange portion formed on the end piece 19.
  • a cable caulking portion 22 that protrudes outward in the axial direction of the cylinder 11 is provided on the outer end surface of the end piece 19.
  • the cable caulking part 22 is formed in a cylindrical shape with an open end, and the end of the wire cable 13 is inserted into the cable caulking part 22 and fixed.
  • a plurality of concentric air holes 23 are formed around the cable caulking portion 22 of the end piece 19 of the cylinder side wire locking portion 17 so as to penetrate in the axial direction of the cylinder 11.
  • the vent hole 23 relieves the back pressure generated in the cylinder 11 on the opposite side of the piston 12 that is moved by the gas pressure of the gas generator 16.
  • the configuration of the gas generator 16 is arbitrary. In the embodiment shown in FIGS. 2 to 3, the gas generator 16 is provided outside the cylinder 11.
  • the gas generator 16 is provided in the cylinder 11. Specifically, the gas generator 16 is provided on the piston 12.
  • the piston 12 has a large-diameter portion 26 that is in sliding contact with the inner periphery of the cylinder 11.
  • a cable fixing portion 27 for locking the wire cable 13 is formed on one side of the large diameter portion 26.
  • a part of the large-diameter portion 26 on the opposite side of the cable fixing portion 27 is formed in a cylindrical shape, and a micro gas generator (MGG) 28 is densely inserted into the large-diameter portion 26 from the other side of the large-diameter portion 26 (see FIG. 7 and 9, the micro gas generator 28 is displayed with fine dots for easy understanding, but the configuration is not limited thereby.
  • MMGG micro gas generator
  • a part of the micro gas generator 28 is formed in a columnar shape, and the outer diameter of the columnar portion of the micro gas generator 28 and the inner diameter of the large diameter portion 26 are set so that they can be inserted into each other and in close contact with each other.
  • the piston 12 forms a gas outlet 29 on one side of the large diameter portion 26, and the other side of the large diameter portion 26 is closed by a columnar portion of the micro gas generator 28.
  • a cap 30 for retaining the micro gas generator (MGG) 28 is attached to the other side of the large diameter portion 26.
  • the cap 30 of the embodiment is screwed into the large diameter portion 26.
  • a through hole 31 is formed in the cap 30, and a coupler 32 is connected to the micro gas generator 28 from the portion of the through hole 31.
  • the harness 33 connected to the coupler 32 is connected to an impact detection device 34 provided at a desired position on the vehicle body.
  • the impact detection device 34 detects an impact, the micro gas generator 28 is operated to generate a large amount of gas, and this large amount of gas is filled into the cylinder 11 from the gas outlet 29, and instantaneously due to the gas pressure at this time.
  • the pretensioner 10 is actuated by moving the piston 12 and pulling the wire cable 13.
  • An O-ring 35 is provided on the large diameter portion 26 of the piston 12.
  • An inclined surface 37 is formed on the outer periphery of the cap 30 to be screwed into the large diameter portion 26 of the piston 12 and has a smaller diameter than the large diameter portion 26 and increases in diameter toward the cylinder side wire locking portion 17.
  • a steel ball 36 for a stopper that stops the return movement of the piston 12 is built in the space between the inner peripheral surface of 11.
  • the movable member K is a moving device for the seat bottom 3
  • the locking portion T is a fixed frame 46 described later
  • the pretensioner 10 is used as a seat pretensioner 10 ⁇ / b> A for the vehicle seat 1. An example is shown.
  • the seat pretensioner 10A When the seat pretensioner 10A detects an impact by the impact detection device 34 provided at a desired position on the vehicle body, the seat pretensioner 10A generates a large amount of gas by the gas generating agent of the gas generator 16, and the wire pressure is instantaneously generated by the gas pressure of the large amount of gas. 13 is pulled, and the seat back 2 is left as it is, independently of the seat belt 40, and only the seat bottom 3 is moved backward at the time of collision with the seat back 2 to improve the restraint of the seated person. is there.
  • the specific configuration of the seat pretensioner 10A is arbitrary, but as an example, the left and right anchor plates 41 of the seat belt 40 and the bases of the inner wrap anchors 42 are provided on the left and right upper rails 35 of the slide rail 5.
  • the left and right fixed frames 46 are attached to a pair of left and right fixed frames 46, and the seat bottom frame 51 of the seat bottom 3 is attached to the left and right fixed frames 46 so as to be movable backward within a predetermined range.
  • 47 is a belt retractor.
  • the fixed frame 46 is used as an engaging portion T, and the first cable 13A and the second cable 13B are engaged with the fixed frame 46 by engaging the base portions of the first cable 13A and the second cable 13B of the pair of left and right wire cables 13, respectively.
  • One end of 13B is connected to piston 12 provided in cylinder 11 of seat pretensioner 10A, and the other end of first cable 13A and second cable 13B is a cylinder-side wire of cylinder 11. It is inserted into the cable caulking portion 22 of the locking portion 17 and fixed by caulking.
  • the cylinder 11 of the seat pretensioner 10 ⁇ / b> A is positioned below the seat bottom frame 51 so that the pulling direction of the wire cable 13 and the axis of the cylinder 11 are substantially parallel to each other.
  • the cylinder 11 is configured to be movable in the direction, and even with one cylinder 11, the first cable 13A connected to the piston 12 and the second cable 13B connected to the cylinder 11 are substantially the same amount at the same time. When pulled, the wire cable 13 moves the seat bottom 3 backward.
  • vent hole 23 of the cylinder side wire locking portion 17 of the cylinder 11 releases the back pressure generated in the cylinder 11 on the opposite side of the piston 12 that is moved by the gas pressure of the gas generator 16. Smooth movement in the opposite direction of each.
  • rod-shaped attachment members 57 are formed on both front and rear side portions of the pair of left and right side members 55 of the seat bottom frame 51 to form a rod-shaped shape.
  • the attachment members 57 are respectively engaged with attachment holes 56 provided in the fixed frame 46 (FIG. 11).
  • the mounting holes 56 are formed in the left and right side portions of the pair of left and right side members 55 of the seat bottom frame 51, and the mounting holes 56 are provided in the fixed frame 46.
  • the front part of the seat bottom frame 51 is attached to the upper part of the arm 58 by a shaft 59 so that the front part of the seat bottom frame 51 can rotate freely. Is rotatably attached to the fixed frame 46 by a shaft 60. Therefore, at the time of collision, the front end of the seat bottom 3 can be raised while moving back, and the restraining effect of the seated person by the seat belt 40 can be further improved, which is preferable.
  • 61 is a cable guide that converts the moving direction of the wire cable 13 in the left-right direction by the piston 12 and the cylinder 11 into the front-rear direction that is the moving direction of the seat bottom 3
  • 62 is a cushioning material for the seat bottom 3
  • 63 is a skin member.
  • the movable member K is a seat belt tensioning device that tensions the entire tension of the seat belt 40, the left and right anchor plates 41 and the inner wrap anchor 42 are locking portions T, and a belt pretensioner 10B that tensions the seat belt 40 is provided.
  • the pretensioner 10 further improves the restraining effect of the seated person on the vehicle seat 1.
  • first cable 13A and the second cable 13B of the pair of left and right wire cables 13 are locked to the bases (locking parts T) of the left and right anchor plates 41 and the inner wrap anchors 42, respectively.
  • One end of the first cable 13 ⁇ / b> A and the second cable 13 ⁇ / b> B of the wire cable 46 is locked to the piston 11.
  • the other end of the first cable 13A and the second cable 13B is inserted into the cable caulking portion 22 of the cylinder side wire locking portion 17 of the cylinder 11 of the belt pretensioner 10B and fixed by caulking.
  • the belt tensioner 10B When the belt pretensioner 10B detects an impact by the impact detection device 34 provided at a desired position on the vehicle body, the belt tensioner 10B pulls the wire cable 13 instantaneously with the gas pressure of the high-pressure gas by the gas generating agent, The occupant is constrained to the vehicle seat 1.
  • the belt pretensioner 10B is configured to pull the first cable 13A and the second cable 13B of the wire cable 13 by one cylinder 11 (piston 12).
  • the left and right anchor plates 41 and the inner wrap anchors 42 are pulled by the first cable 13 ⁇ / b> A and the second cable 13 ⁇ / b> B substantially simultaneously to restrain the occupant to the vehicle seat 1.
  • the cylinder 11 of the belt pretensioner 10B is positioned so that the pulling direction of the wire cable 13 and the axis of the cylinder 11 are parallel to the vehicle seat 1 or the vehicle body.
  • the cylinder 11 is installed so as to be movable only in the axial direction of the cylinder 11. That is, the piston 12 and the cylinder 11 are configured to move in opposite directions by causing the reaction force of the piston 12 that instantaneously moves due to a large amount of gas from the gas generator 16 to act on the cylinder 11 (FIG. 4).
  • the belt pretensioner 10B can also be constituted by a single cylinder 11, and pulls the first cable 13A connected to the piston 12 and the second cable 13B connected to the cylinder 11 at substantially the same amount.
  • the wire cable 13 restrains the occupant to the vehicle seat 1.
  • a vent hole 23 is also provided in the cylinder side wire locking portion 17 of the cylinder 11 of the belt pretensioner 10B to release the back pressure generated in the cylinder 11 on the opposite side of the piston 12 moving by the gas pressure of the gas generator 16, The piston 12 and the cylinder 11 are smoothly moved in opposite directions.
  • Reference numeral 65 denotes a tongue plate provided at an intermediate portion of the seat belt 40, and 66 denotes an inner buckle.
  • the shoulder belt 67 extends from the vicinity of the shoulder of the seated person on one end side of the belt retractor 47 to the tongue plate 65, and from the tongue plate 65 to the anchor plate 41.
  • the lap belt 68 Up to this is the lap belt 68.
  • 69 is a through anchor
  • 70 is a cable guide
  • 71 is a roller provided in the cable guide 70.
  • the belt retractor 47 has a publicly known configuration and normally allows the seat belt 40 to be pulled out, but it only needs to incorporate a mechanism that locks the seat belt 40 when the impact is applied.
  • the tongue plate 65 is also a known configuration and is movable with respect to the seat belt 40, but is configured so as not to move with respect to the seat belt 40 when the normal seat belt 40 is pulled out.
  • the pretensioner 10 serving as the seat pretensioner 10 ⁇ / b> A and the belt pretensioner 10 ⁇ / b> B generates a large amount of gas from the micro gas generator 28 when the impact detection device 34 detects an impact, and the cylinder 11 on one side of the piston 12.
  • the piston 12 is instantaneously moved by the gas pressure, and the reaction force of the movement of the piston 12 acts on the cylinder 11 so that the piston 12 and the cylinder 11 move in directions opposite to each other.
  • the pretensioner 10 includes a movable member K that restrains a seated person by pulling the first cable 13A and the second cable 13B of the wire cable 13 that are respectively locked to the locking portion T by the piston 12 and the cylinder 11. Actuate and restrain the occupant.
  • a cylinder-side wire locking portion 17 is provided at the end of the cylinder 11 on the moving direction side of the piston 12, and the cylinder-side wire locking portion 17 is an outer peripheral surface of a columnar end piece 19 having a predetermined length.
  • the end of the cylinder pipe 18 of the cylinder 11 is caulked and fixed to the groove 20, and the end piece 19 protrudes in the axial direction of the cylinder 11 to open the tip. Since the cylindrical caulking portion 22 is provided, the end portion of the wire cable 13 is inserted into the caulking portion 22 and fixed.
  • the flange portion 21 is formed in the end piece 19 of the cylinder side wire locking portion 17, when the end piece 19 of the cylinder side wire locking portion 17 is inserted into the cylinder pipe 18 of the cylinder 11, the flange portion 21 becomes the cylinder.
  • the cylinder pipe 18 is crimped in this state when it hits the end surface of the pipe 18, the end of the cylinder pipe 18 is fitted into the groove 20, and the cylinder pipe 18 and the cylinder side wire locking portion 17 are firmly fixed. And fixing work is easy.
  • the end piece 19 of the cylinder side wire locking portion 17 is provided with a cable caulking portion 22 protruding in the axial direction of the cylinder 11, and the cable caulking portion 22 is formed in a cylindrical shape with an open end.
  • the end piece 19 of the cylinder side wire locking portion 17 around the cable caulking portion 22 is provided with a plurality of concentric vent holes 23 penetrating in the axial direction of the cylinder 11.
  • the seat belt 40 restrains the seat occupant.
  • the cushion material (pad) of the seat bottom 3 is bent due to the inertia force of the seat occupant accompanying deceleration, and the seat belt 40 is slackened and stretched.
  • the pretensioner tried to restrain the seat belt by pulling it at the time of collision. Since only one of the two sides is pulled, there is a limit in improving the restraining effect by further increasing the rise of the restraining force.
  • the movable member K is used as a moving device for the seat bottom 3
  • the locking portion T is used as a fixed frame 46
  • the pretensioner 10 is used as a seat pretensioner 10A for a vehicle seat 1.
  • the tensioner 10A the seat back 2 of the vehicle seat 1 is left as it is, independently of the seat belt 40, and only the seat bottom 3 is instantaneously moved backward when a collision with the fixed frame 46 (slide rail 5) is detected.
  • the seat bottom 3 is moved backward while actively increasing the reaction force of the cushioning material 62 by positively generating the deflection of the cushioning material 62 instantly.
  • the restraint effect on the vehicle seat 1 of the seated person can be reduced by shortening the rise of the restraining force and reducing the movement amount of the seated person.
  • the seat surface of the seat bottom 3 that moves backward supports the seated person and improves the restraining effect of the seated person on the vehicle seat 1.
  • a pair of left and right side members 55 of the seat bottom frame 51 of the seat bottom 3 is provided with a rod-shaped attachment member 57 (attachment hole 56), and the attachment member 57 is provided with a long attachment hole 56 (attachment) at the front and rear provided in the fixed frame 46. Since the member 57) is inserted so as to be relatively movable, the seat bottom frame 51 moves the seat bottom frame 51 backward relative to the fixed frame 46. Therefore, the seat bottom 3 more reliably supports the seat occupant by the rearward movement of the seat bottom 3 and improves the restraining effect of the seat occupant on the vehicle seat 1.
  • the front portion of the seat bottom frame 51 is mounted up and down freely by the arm 58, when the seat bottom 3 retracts at the time of collision, it can be retracted while raising the front end of the seat bottom 3, It is preferable that the seating surface of the seat bottom 3 below the user's buttocks becomes higher, and the reaction force of the cushioning material 62 can be further increased and the restraining effect of the seated person by the seat belt 40 can be further improved.
  • the rear portions of the side members 55 of the seat bottom frame 51 of the seat bottom 3 are engaged with the respective base portions of the first cable 13A and the second cable 13B of the pair of left and right wire cables 13, respectively.
  • One end of either the first cable 13A or the second cable 13B is connected to the piston 12 side provided in the cylinder 11 of the seat pretensioner 10A, and the other end of either the first cable 13A or the second cable 13B.
  • the cylinder 11 of the seat pretensioner 10 ⁇ / b> A is positioned so that the pulling direction of the wire cable 13 and the axis of the cylinder 11 are parallel to the vehicle seat 1, and is movable only in the direction of the axis of the cylinder 11. Since the cylinder 11 is installed, the reaction force of the piston 12 moved by the gas of the gas generator 16 acts on the movable cylinder 11, and the piston 12 and the cylinder 11 move in opposite directions.
  • the first cable 13 ⁇ / b> A connected to the piston 12 and the second cable 13 ⁇ / b> B connected to the cylinder 11 can be pulled at substantially the same amount at the same time to move the seat bottom frame 51 backward, and the configuration of the seat occupant restraint mechanism The number of parts can be reduced and provided at low cost.
  • a cylinder-side wire locking portion 17 is provided at the end of the cylinder 11 on the moving direction side of the piston 12 of the seat pretensioner 10A, and the cylinder-side wire locking portion 17 has a cylindrical end having a predetermined length. Since the annular groove 20 is formed on the outer peripheral surface of the piece 19, when the end of the cylinder pipe 18 of the cylinder 11 is caulked and fixed to the groove 20, the cylinder side wire locking of the seat pretensioner 10A is performed. The part 17 can be fixed easily.
  • the end piece 19 of the cylinder side wire locking portion 17 of the cylinder 11 of the seat pretensioner 10 ⁇ / b> A is provided with a cylindrical cable caulking portion 22 having an open end projecting in the axial direction of the cylinder 11, and the cable caulking portion 22. Since the end of the wire cable 13 is inserted and fixed by caulking, the wire cable 13 is reliably pulled by the movement of the cylinder 11 due to the reaction force of the movement of the piston 12 of the seat pretensioner 10A. The operation of the restraint sheet pretensioner 10A is ensured.
  • the end piece 19 of the cylinder side wire locking portion 17 around the cable caulking portion 22 of the cylinder 11 of the seat pretensioner 10A is provided with a plurality of concentric vent holes 23 penetrating in the axial direction of the cylinder 11. Therefore, when the piston 12 is moved by the gas pressure of the gas generator 16, the back pressure generated in the cylinder 11 on the moving direction side of the piston 12 is released from the vent hole 23 to the outside of the cylinder 11, and the back pressure is effectively reduced. Therefore, the movement of the piston 12 is made smooth, and the movement of the cylinder 11 by the reaction force of the piston 12 is also made smooth. Therefore, when both the cylinder 11 and the piston 12 move and the seat pretensioner 10 ⁇ / b> A is constituted by one cylinder 11, in particular, a rational configuration that can be effectively operated with a stable operation. Can be.
  • the cylinder 11 is arranged below the front lower surface of the seat bottom frame 51 of the seat bottom 3, and the axial center direction of the cylinder 11 is arranged in the left-right direction.
  • the seater restraint mechanism can be installed without sacrificing the legability of the seated person seated on the vehicle seat 1 behind 1, and on the other hand, the operation of the seat pretensioner 10A can be performed reliably and reliably.
  • the movable member K is a seat belt tensioning device that tensions the entire tension of the seat belt 40, the anchor plate 41 or the inner wrap anchor 42 is the locking portion T, and the belt pretensioner 10B that tensions the seat belt 40 is provided.
  • the pretensioner 10 is used to further improve the restraining effect of the seated person on the vehicle seat 1.
  • the seat belt 40 is configured to be pulled by both the left and right anchor plates 41 or the inner wrap anchors 42 by the belt pretensioner 10B to tension the entire tension of the seatbelt 40, and the belt pretensioner 10B
  • the wire cable 13 is instantaneously pulled by the gas pressure of a large amount of high-pressure gas by the gas generating agent, the seat belt 40 is tensioned, and the occupant is attached to the vehicle seat 1. to bound.
  • One of the first cable 13A and the second cable 13B of the wire cable 13 is connected to the piston 12 provided in the cylinder 11 of the belt pretensioner 10B, and the other of the first cable 13A and the second cable 13B. Is connected to the cable caulking portion 22 of the cylinder side wire locking portion 17 of the cylinder 11, so that the left and right anchor plates 41 and the inner wrap anchors 42 are pulled substantially simultaneously by one cylinder 11 of the belt pretensioner 10B. The passenger is restrained to the vehicle seat 1.
  • the cylinder 11 of the belt pretensioner 10B is positioned so that the pulling direction of the wire cable 13 and the axis of the cylinder 11 are parallel to the vehicle seat 1 or the vehicle body, and in the axis direction of the cylinder 11. Since the cylinder 11 is installed only movably, the reaction force of the piston 12, which is instantaneously moved by a large amount of gas from the gas generator 16, acts on the cylinder 11, and the piston 12 and the cylinder 11 move in opposite directions. To do.
  • each of the first cable 13A and the second cable 13B pulls the left and right anchor plates 41 and inner wrap anchors 42 substantially simultaneously, and restrains the occupant to the vehicle seat 1.
  • the end piece 19 of the cylinder side wire locking portion 17 around the cable caulking portion 22 of the cylinder 11 of the belt pretensioner 10B is provided with a plurality of concentric vent holes 23 penetrating in the axial direction of the cylinder 11. Therefore, when the piston 12 is moved by the gas pressure of the gas generator 16, the back pressure generated in the cylinder 11 on the moving direction side of the piston 12 is released from the vent hole 23 to the outside of the cylinder 11, and the back pressure is effectively reduced. Therefore, the movement of the piston 12 is made smooth, and the movement of the cylinder 11 by the reaction force of the piston 12 is also made smooth.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Automotive Seat Belt Assembly (AREA)
  • Seats For Vehicles (AREA)

Abstract

A pretensioner has a cylinder (11) to which a first cable is connected, a piston (12) moving in the cylinder (11) and to which a second cable is connected, and a gas generator (16) for supplying gas to an expansion chamber in the cylinder (11) to move the piston (12) in a first direction and move the cylinder (11) in a second direction. The cylinder (11) is provided with a wire engagement portion (17). The wire engagement portion (17) has a tubular, cable staking portion (22) projecting in the direction of the axis of the cylinder (11) and having an opening in the head of the cable staking portion (22). An end of the first cable is inserted and fixed to the cable staking portion.

Description

車両シートのプリテンショナーVehicle seat pretensioner
　本発明は、ＰＣＴ／ＪＰ２００８／０５２５７９（以下、先の発明）の改良に関するものであり、車両衝突等により大きな外力が車体に作用したときに、シートボトムやシートベルト等の可動部材を移動させて着座者を保護するプリテンショナーに関するものである。 The present invention relates to an improvement of PCT / JP2008 / 052579 (hereinafter referred to as the previous invention), and when a large external force acts on the vehicle body due to a vehicle collision or the like, a movable member such as a seat bottom or a seat belt is moved. The present invention relates to a pretensioner for protecting a seated person.
　従来、車両衝突時、シートベルトを積極的に緊張させることで着座者をいち早くシートベルトにより拘束するシートベルトプリテンショナーが開発されている（特許文献１）。プリテンショナーは、着座者を早く拘束でき、着座者の好ましくない移動を軽減させる。 Conventionally, a seat belt pretensioner that quickly restrains a seated person by a seat belt by positively tensioning the seat belt at the time of a vehicle collision has been developed (Patent Document 1). The pretensioner can restrain the seat occupant quickly and reduces undesired movement of the seat occupant.
　前記先の発明では、１個のガスジェネレータの出力で、２本のワイヤーケーブルを等しい力で等しい距離だけ動かすことができるプリテンショナーが提案されている。
特開２００３－１４６１８４号公報 In the above-described invention, a pretensioner that can move two wire cables by an equal distance with an equal force using the output of one gas generator has been proposed.
JP 2003-146184 A
　前記先の発明のプリテンショナーにおいては、ワイヤーケーブルとシリンダとの連結作業が面倒であった。また、ピストンがシリンダ内を移動するときの背圧の処理に不利があった。 In the pretensioner of the previous invention, the connecting work between the wire cable and the cylinder is troublesome. In addition, there is a disadvantage in processing back pressure when the piston moves in the cylinder.
　よって、本発明の目的は、上記課題を克服したプリテンショナーを提供することにある。 Therefore, an object of the present invention is to provide a pretensioner that overcomes the above problems.
シートベルトを備えた車両シートの斜視図。The perspective view of the vehicle seat provided with the seatbelt. プリテンショナーの断面図。Sectional drawing of a pretensioner. プリテンショナーのシリンダとピストンの移動状態を示す概略図。Schematic which shows the movement state of the cylinder and piston of a pretensioner. プリテンショナーのシリンダの概略斜視図。The schematic perspective view of the cylinder of a pretensioner. シリンダ側のワイヤ係止部の斜視図。The perspective view of the wire latching | locking part by the side of a cylinder. シリンダ側のワイヤ係止部の断面図。Sectional drawing of the wire latching | locking part by the side of a cylinder. プリテンショナーの別の実施例の断面図。Sectional drawing of another Example of a pretensioner. 図７のピストンの斜視図。The perspective view of the piston of FIG. 図７のプリテンショナーの断面図。Sectional drawing of the pretensioner of FIG. 図７のプリテンショナーのシリンダとピストンの移動状態を示す概略図。Schematic which shows the movement state of the cylinder and piston of the pretensioner of FIG. シートボトムフレームの斜視図。The perspective view of a seat bottom frame. シート用プリテンショナーおよびシートボトムフレームの斜視図。The perspective view of a seat pretensioner and a seat bottom frame. シート用プリテンショナーおよびシートボトムフレームの斜視図。The perspective view of a seat pretensioner and a seat bottom frame. プリテンショナーが作動前の前記シートボトムの側面図。The side view of the said seat bottom before a pretensioner act | operates. プリテンショナーが作動後の前記シートボトムの側面図。The side view of the said seat bottom after the pretensioner act | operates. シートベルト用プリテンショナーを備えた車両シートを示す斜視図。The perspective view which shows the vehicle seat provided with the pretensioner for seatbelts. ベルト用プリテンショナーのケーブルガイド付近の斜視図。The perspective view of the cable guide vicinity of the belt pretensioner.
　本発明の実施例を図面により説明すると、１は車両シート、２は車両シート１のシートバック、３はシートボトム、４はシートバック２の上部に設けたヘッドレスト、５は車両シート１を車体６に対して移動させるスライドレールである。 An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a vehicle seat, 2 denotes a seat back of the vehicle seat 1, 3 denotes a seat bottom, 4 denotes a headrest provided on the upper portion of the seat back 2, and 5 denotes a vehicle seat 1 It is a slide rail moved with respect to.
　車両シート１には、ガス発生剤により大量のガスを発生させて車両シートの可動部材Ｋを任意に作動させるプリテンショナー１０を設ける。プリテンショナー１０は、シリンダ１１内にピストン１２を設ける。ピストン１２にはワイヤケーブル１３の一端を接続し、ワイヤケーブル１３の他端はシリンダ１１のガイド部１４の挿通孔１５からシリンダ１１の外部に引き出して任意の係止部Ｔに接続する(図２、図９)。 The vehicle seat 1 is provided with a pretensioner 10 that generates a large amount of gas with a gas generating agent and arbitrarily operates the movable member K of the vehicle seat. The pretensioner 10 is provided with a piston 12 in a cylinder 11. One end of a wire cable 13 is connected to the piston 12, and the other end of the wire cable 13 is pulled out of the cylinder 11 from the insertion hole 15 of the guide portion 14 of the cylinder 11 and connected to an arbitrary locking portion T (FIG. 2). FIG. 9).
　この場合、ワイヤケーブル１３は一対の第１ケーブル１３Ａと第２ケーブル１３Ｂとにより構成する。第１ケーブル１３Ａと第２ケーブル１３Ｂの何れか一方の先端はプリテンショナー１０の一つ設けたシリンダ１１のピストン１２側に接続し、前記第１ケーブル１３Ａと第２ケーブル１３Ｂの何れか他方の先端は前記ガイド部１４の反対側となるシリンダ１１のシリンダ側ワイヤ係止部１７に接続する。シリンダ１１は所定の固定部に対して移動自在に取付け、もって、シリンダ１１とピストン１２とが互いに反力により夫々反対に移動するように構成する。 In this case, the wire cable 13 is constituted by a pair of the first cable 13A and the second cable 13B. One end of either the first cable 13A or the second cable 13B is connected to the piston 12 side of the cylinder 11 provided with one pretensioner 10, and the other end of either the first cable 13A or the second cable 13B. Is connected to a cylinder-side wire locking portion 17 of the cylinder 11 on the opposite side of the guide portion 14. The cylinder 11 is movably attached to a predetermined fixed portion, and is configured such that the cylinder 11 and the piston 12 move in opposite directions by reaction forces.
　前記シリンダ１１にはピストン１２を移動させる多量のガスを供給するガスジェネレータ１６を設ける。ガスジェネレータ１６の構成は公知であり、図示は省略するが、内部にガス発生剤を内蔵し、このガス発生剤により高圧ガスを発生させ、このガス圧によって瞬時にピストン１２を移動させるように構成する。 The cylinder 11 is provided with a gas generator 16 for supplying a large amount of gas for moving the piston 12. The configuration of the gas generator 16 is well known, and although not shown in the drawing, a gas generating agent is incorporated therein, a high pressure gas is generated by this gas generating agent, and the piston 12 is instantaneously moved by this gas pressure. To do.
　前記シリンダ側ワイヤ係止部１７は、シリンダ１１のシリンダパイプ１８より小径で、かつ、所定長さを有する円柱状のエンドピース１９を有して構成する。エンドピース１９の外周面には全周に亘って環状の凹溝２０を形成する。エンドピース１９はシリンダパイプ１８の端部に挿入し、凹溝２０の部分とシリンダパイプ１８の端部とを重ねてカシメ付けして固定する。２１はエンドピース１９に形成したフランジ部である。 The cylinder-side wire locking portion 17 has a cylindrical end piece 19 having a smaller diameter than the cylinder pipe 18 of the cylinder 11 and a predetermined length. An annular groove 20 is formed on the outer peripheral surface of the end piece 19 over the entire circumference. The end piece 19 is inserted into the end of the cylinder pipe 18, and the concave groove 20 and the end of the cylinder pipe 18 are overlapped and caulked and fixed. Reference numeral 21 denotes a flange portion formed on the end piece 19.
　エンドピース１９の外端面にはシリンダ１１の軸心方向外側に向かって突き出るケーブルカシメ部２２を設ける。ケーブルカシメ部２２は先端を開口させた筒状に形成し、ケーブルカシメ部２２にワイヤケーブル１３の端部を挿入してカシメ固定する。 A cable caulking portion 22 that protrudes outward in the axial direction of the cylinder 11 is provided on the outer end surface of the end piece 19. The cable caulking part 22 is formed in a cylindrical shape with an open end, and the end of the wire cable 13 is inserted into the cable caulking part 22 and fixed.
　シリンダ側ワイヤ係止部１７のエンドピース１９のケーブルカシメ部２２の周囲にはシリンダ１１の軸心方向に貫通する通気孔２３を同心状に複数設ける。通気孔２３はガスジェネレータ１６のガス圧で移動するピストン１２の反対側のシリンダ１１内に生じる背圧を逃がすものである。前記ガスジェネレータ１６の構成は任意であり、図２～図３の実施例では、シリンダ１１の外側にガスジェネレータ１６を設けている。 A plurality of concentric air holes 23 are formed around the cable caulking portion 22 of the end piece 19 of the cylinder side wire locking portion 17 so as to penetrate in the axial direction of the cylinder 11. The vent hole 23 relieves the back pressure generated in the cylinder 11 on the opposite side of the piston 12 that is moved by the gas pressure of the gas generator 16. The configuration of the gas generator 16 is arbitrary. In the embodiment shown in FIGS. 2 to 3, the gas generator 16 is provided outside the cylinder 11.
　図７～図１０の実施例では、前記ガスジェネレータ１６はシリンダ１１内に設ける。具体的には、ガスジェネレータ１６は前記ピストン１２に設ける。ピストン１２は、シリンダ１１の内周に摺接する大径部２６を有して構成する。大径部２６の一方側にはワイヤケーブル１３を係止するケーブル固定部２７を形成する。ケーブル固定部２７の反対側の大径部２６の一部は筒状に形成し、大径部２６の他方側からマイクロガスジェネレータ（ＭＧＧ）２８を大径部２６内に密に挿入する(図７，９において、理解を容易にするためにマイクロガスジェネレータ２８に細点を付して表示しているが、これにより構成は限定されない)。 7 to 10, the gas generator 16 is provided in the cylinder 11. Specifically, the gas generator 16 is provided on the piston 12. The piston 12 has a large-diameter portion 26 that is in sliding contact with the inner periphery of the cylinder 11. A cable fixing portion 27 for locking the wire cable 13 is formed on one side of the large diameter portion 26. A part of the large-diameter portion 26 on the opposite side of the cable fixing portion 27 is formed in a cylindrical shape, and a micro gas generator (MGG) 28 is densely inserted into the large-diameter portion 26 from the other side of the large-diameter portion 26 (see FIG. 7 and 9, the micro gas generator 28 is displayed with fine dots for easy understanding, but the configuration is not limited thereby.
　したがって、マイクロガスジェネレータ２８の一部は柱状に形成し、マイクロガスジェネレータ２８の柱状部分の外径と大径部２６の内径を互いに挿入可能であって互いに密着するように設定する。前記ピストン１２は、大径部２６の一方側にガス噴出口２９を形成し、前記大径部２６の他方側は前記マイクロガスジェネレータ２８の柱状部分により閉塞状態とする。 Therefore, a part of the micro gas generator 28 is formed in a columnar shape, and the outer diameter of the columnar portion of the micro gas generator 28 and the inner diameter of the large diameter portion 26 are set so that they can be inserted into each other and in close contact with each other. The piston 12 forms a gas outlet 29 on one side of the large diameter portion 26, and the other side of the large diameter portion 26 is closed by a columnar portion of the micro gas generator 28.
　大径部２６の他方側にはマイクロガスジェネレータ（ＭＧＧ）２８の抜け止め用のキャップ３０を取付ける。実施例のキャップ３０は大径部２６に螺合させている。キャップ３０には透孔３１を形成し、透孔３１の部分からマイクロガスジェネレータ２８にカプラ３２を接続する。カプラ３２に接続したハーネス３３は、車体所望位置に設けた衝撃検出装置３４に接続する。衝撃検出装置３４は衝撃を検知すると、マイクロガスジェネレータ２８を作動させて多量のガスを発生させ、この多量のガスをガス噴出口２９からシリンダ１１内に充満させ、このときのガス圧により瞬時にピストン１２を移動させてワイヤケーブル１３を牽引してプリテンショナー１０を作動させる。 A cap 30 for retaining the micro gas generator (MGG) 28 is attached to the other side of the large diameter portion 26. The cap 30 of the embodiment is screwed into the large diameter portion 26. A through hole 31 is formed in the cap 30, and a coupler 32 is connected to the micro gas generator 28 from the portion of the through hole 31. The harness 33 connected to the coupler 32 is connected to an impact detection device 34 provided at a desired position on the vehicle body. When the impact detection device 34 detects an impact, the micro gas generator 28 is operated to generate a large amount of gas, and this large amount of gas is filled into the cylinder 11 from the gas outlet 29, and instantaneously due to the gas pressure at this time. The pretensioner 10 is actuated by moving the piston 12 and pulling the wire cable 13.
　ピストン１２の大径部２６にはオーリング３５を設ける。ピストン１２の大径部２６に螺合させるキャップ３０の外周には大径部２６より小径でシリンダ側ワイヤ係止部１７に至るに従い大径となる傾斜面３７を形成し、傾斜面３７とシリンダ１１の内周面との間の空間にピストン１２の戻り移動を停止させるストッパ用の鋼球３６を内蔵させる。 An O-ring 35 is provided on the large diameter portion 26 of the piston 12. An inclined surface 37 is formed on the outer periphery of the cap 30 to be screwed into the large diameter portion 26 of the piston 12 and has a smaller diameter than the large diameter portion 26 and increases in diameter toward the cylinder side wire locking portion 17. A steel ball 36 for a stopper that stops the return movement of the piston 12 is built in the space between the inner peripheral surface of 11.
　図１１～図１５は、前記可動部材Ｋをシートボトム３の移動装置とし、前記係止部Ｔは後述する固定フレーム４６とし、前記プリテンショナー１０を車両シート１のシート用プリテンショナー１０Ａに使用した実施例を示したものである。 11 to 15, the movable member K is a moving device for the seat bottom 3, the locking portion T is a fixed frame 46 described later, and the pretensioner 10 is used as a seat pretensioner 10 </ b> A for the vehicle seat 1. An example is shown.
　シート用プリテンショナー１０Ａは、車体所望位置に設けた衝撃検出装置３４により衝撃を検知すると、ガスジェネレータ１６のガス発生剤により多量のガスを発生させ、この多量のガスのガス圧により瞬時にワイヤーケーブル１３を牽引して、シートバック２はそのままにして、シートベルト４０とは独立させてシートボトム３だけをシートバック２に対して衝突時に後方移動させて、着座者の拘束性を向上させるものである。 When the seat pretensioner 10A detects an impact by the impact detection device 34 provided at a desired position on the vehicle body, the seat pretensioner 10A generates a large amount of gas by the gas generating agent of the gas generator 16, and the wire pressure is instantaneously generated by the gas pressure of the large amount of gas. 13 is pulled, and the seat back 2 is left as it is, independently of the seat belt 40, and only the seat bottom 3 is moved backward at the time of collision with the seat back 2 to improve the restraint of the seated person. is there.
　シート用プリテンショナー１０Ａの具体的構成は任意であるが、一例を示すと、シートベルト４０の左右のアンカープレート４１およびインナーラップアンカー４２の基部を、スライドレール５の左右のアッパーレール３５に設けた左右一対の固定フレーム４６に取付け、左右の固定フレーム４６には前記シートボトム３のシートボトムフレーム５１を所定範囲で後方移動可能に取付ける。４７はベルトリトラクターである。 The specific configuration of the seat pretensioner 10A is arbitrary, but as an example, the left and right anchor plates 41 of the seat belt 40 and the bases of the inner wrap anchors 42 are provided on the left and right upper rails 35 of the slide rail 5. The left and right fixed frames 46 are attached to a pair of left and right fixed frames 46, and the seat bottom frame 51 of the seat bottom 3 is attached to the left and right fixed frames 46 so as to be movable backward within a predetermined range. 47 is a belt retractor.
　前記固定フレーム４６を係止部Ｔとし、固定フレーム４６には夫々左右一対のワイヤーケーブル１３の第１ケーブル１３Ａと第２ケーブル１３Ｂの夫々の基部を係止し、第１ケーブル１３Ａと第２ケーブル１３Ｂの先端の何れか一方は、シート用プリテンショナー１０Ａのシリンダ１１内に設けたピストン１２に接続し、第１ケーブル１３Ａと第２ケーブル１３Ｂの何れか他方の端部はシリンダ１１のシリンダ側ワイヤ係止部１７のケーブルカシメ部２２に挿入してカシメ固定する。 The fixed frame 46 is used as an engaging portion T, and the first cable 13A and the second cable 13B are engaged with the fixed frame 46 by engaging the base portions of the first cable 13A and the second cable 13B of the pair of left and right wire cables 13, respectively. One end of 13B is connected to piston 12 provided in cylinder 11 of seat pretensioner 10A, and the other end of first cable 13A and second cable 13B is a cylinder-side wire of cylinder 11. It is inserted into the cable caulking portion 22 of the locking portion 17 and fixed by caulking.
　また、前記シート用プリテンショナー１０Ａのシリンダ１１は、シートボトムフレーム５１の下方にワイヤーケーブル１３の牽引方向とシリンダ１１の軸芯とが略並行となるように位置させ、かつ、シリンダ１１の軸芯方向にシリンダ１１を移動自在に設置するように構成し、一つのシリンダ１１によっても、ピストン１２に接続した第１ケーブル１３Ａと、シリンダ１１に接続した第２ケーブル１３Ｂとが、略同時に略同量牽引されて、ワイヤーケーブル１３はシートボトム３を後方移動させる。 The cylinder 11 of the seat pretensioner 10 </ b> A is positioned below the seat bottom frame 51 so that the pulling direction of the wire cable 13 and the axis of the cylinder 11 are substantially parallel to each other. The cylinder 11 is configured to be movable in the direction, and even with one cylinder 11, the first cable 13A connected to the piston 12 and the second cable 13B connected to the cylinder 11 are substantially the same amount at the same time. When pulled, the wire cable 13 moves the seat bottom 3 backward.
　そして、シリンダ１１のシリンダ側ワイヤ係止部１７の通気孔２３が、ガスジェネレータ１６のガス圧で移動するピストン１２の反対側のシリンダ１１内に生じる背圧を逃がして、ピストン１２とシリンダ１１の夫々の反対方向移動を円滑にさせる。 The vent hole 23 of the cylinder side wire locking portion 17 of the cylinder 11 releases the back pressure generated in the cylinder 11 on the opposite side of the piston 12 that is moved by the gas pressure of the gas generator 16. Smooth movement in the opposite direction of each.
　前記シートボトム３の具体的移動構成は任意であるが、一例を示すと、シートボトムフレーム５１の左右一対の側部部材５５の前後両側部部分に棒状形状の取付部材５７を形成し、棒状形状の取付部材５７は固定フレーム４６に設けた取付孔５６に夫々係合させる(図１１)。 The specific configuration of movement of the seat bottom 3 is arbitrary, but as an example, rod-shaped attachment members 57 are formed on both front and rear side portions of the pair of left and right side members 55 of the seat bottom frame 51 to form a rod-shaped shape. The attachment members 57 are respectively engaged with attachment holes 56 provided in the fixed frame 46 (FIG. 11).
　また、図１２～図１５の実施例では、シートボトムフレーム５１の左右一対の側部部材５５の後方左右両側部部分に取付孔５６を形成し、取付孔５６に固定フレーム４６に設けた棒状形状の取付部材５７を夫々係合させるが、シートボトムフレーム５１の前側部分は、取付孔５６と取付部材５７によらずに、アーム５８の上部を軸５９により回動自在に取付け、アーム５８の下部は軸６０により固定フレーム４６に回動自在に取付ける。そのため、衝突時、シートボトム３の前端を上昇させながら後退するようにでき、シートベルト４０による着座者の拘束効果のさらなる向上を図ることができ、好適である。 12 to 15, the mounting holes 56 are formed in the left and right side portions of the pair of left and right side members 55 of the seat bottom frame 51, and the mounting holes 56 are provided in the fixed frame 46. The front part of the seat bottom frame 51 is attached to the upper part of the arm 58 by a shaft 59 so that the front part of the seat bottom frame 51 can rotate freely. Is rotatably attached to the fixed frame 46 by a shaft 60. Therefore, at the time of collision, the front end of the seat bottom 3 can be raised while moving back, and the restraining effect of the seated person by the seat belt 40 can be further improved, which is preferable.
　６１はピストン１２とシリンダ１１によるワイヤーケーブル１３の左右方向の移動方向をシートボトム３の移動方向である前後方向に変換するケーブルガイド、６２はシートボトム３のクッション材、６３は表皮部材である。 61 is a cable guide that converts the moving direction of the wire cable 13 in the left-right direction by the piston 12 and the cylinder 11 into the front-rear direction that is the moving direction of the seat bottom 3, 62 is a cushioning material for the seat bottom 3, and 63 is a skin member.
　前記可動部材Ｋをシートベルト４０の全体の張力を緊張させるシートベルト緊張装置とし、左右のアンカープレート４１およびインナーラップアンカー４２を係止部Ｔとし、シートベルト４０を緊張させるベルト用プリテンショナー１０Ｂを、前記プリテンショナー１０により構成し、一層、着座者の車両シート１への拘束効果を向上させている。 The movable member K is a seat belt tensioning device that tensions the entire tension of the seat belt 40, the left and right anchor plates 41 and the inner wrap anchor 42 are locking portions T, and a belt pretensioner 10B that tensions the seat belt 40 is provided. The pretensioner 10 further improves the restraining effect of the seated person on the vehicle seat 1.
　具体的には、左右のアンカープレート４１およびインナーラップアンカー４２の基部（係止部Ｔ）に夫々左右一対のワイヤーケーブル１３の第１ケーブル１３Ａと第２ケーブル１３Ｂの夫々の基部を係止し、ワイヤーケーブル４６の第１ケーブル１３Ａと第２ケーブル１３Ｂのうちの一方の端部はピストン１１に係止する。第１ケーブル１３Ａと第２ケーブル１３Ｂのうちの他方の端部はベルト用プリテンショナー１０Ｂのシリンダ１１のシリンダ側ワイヤ係止部１７のケーブルカシメ部２２に挿入してカシメ固定する。 Specifically, the first cable 13A and the second cable 13B of the pair of left and right wire cables 13 are locked to the bases (locking parts T) of the left and right anchor plates 41 and the inner wrap anchors 42, respectively. One end of the first cable 13 </ b> A and the second cable 13 </ b> B of the wire cable 46 is locked to the piston 11. The other end of the first cable 13A and the second cable 13B is inserted into the cable caulking portion 22 of the cylinder side wire locking portion 17 of the cylinder 11 of the belt pretensioner 10B and fixed by caulking.
　ベルト用プリテンショナー１０Ｂは、車体所望位置に設けた衝撃検出装置３４により衝撃を検知すると、ガス発生剤により高圧ガスのガス圧で瞬時にワイヤーケーブル１３を牽引して、シートベルト４０を緊張させ、乗員を車両シート１に拘束するように構成する。 When the belt pretensioner 10B detects an impact by the impact detection device 34 provided at a desired position on the vehicle body, the belt tensioner 10B pulls the wire cable 13 instantaneously with the gas pressure of the high-pressure gas by the gas generating agent, The occupant is constrained to the vehicle seat 1.
　シート用プリテンショナー１０Ａと同様に、ベルト用プリテンショナー１０Ｂは、一つのシリンダ１１（ピストン１２）によりワイヤーケーブル１３の第１ケーブル１３Ａと第２ケーブル１３Ｂの夫々を牽引するように構成する。左右のアンカープレート４１およびインナーラップアンカー４２は略同時に第１ケーブル１３Ａと第２ケーブル１３Ｂにより牽引され、乗員を車両シート１に拘束する。 Similarly to the seat pretensioner 10A, the belt pretensioner 10B is configured to pull the first cable 13A and the second cable 13B of the wire cable 13 by one cylinder 11 (piston 12). The left and right anchor plates 41 and the inner wrap anchors 42 are pulled by the first cable 13 </ b> A and the second cable 13 </ b> B substantially simultaneously to restrain the occupant to the vehicle seat 1.
　また、シート用プリテンショナー１０Ａと同様に、前記ベルト用プリテンショナー１０Ｂのシリンダ１１は、車両シート１または車体に対してワイヤーケーブル１３の牽引方向とシリンダ１１の軸芯が並行となるように位置させ、かつ、シリンダ１１の軸芯方向にのみ移動自在にシリンダ１１を設置する。即ち、ガスジェネレータ１６の多量のガスにより瞬時に移動するピストン１２の反力をシリンダ１１に作用させて、ピストン１２とシリンダ１１とを互いに反対方向に移動するように構成する（図４）。 Similarly to the seat pretensioner 10A, the cylinder 11 of the belt pretensioner 10B is positioned so that the pulling direction of the wire cable 13 and the axis of the cylinder 11 are parallel to the vehicle seat 1 or the vehicle body. The cylinder 11 is installed so as to be movable only in the axial direction of the cylinder 11. That is, the piston 12 and the cylinder 11 are configured to move in opposite directions by causing the reaction force of the piston 12 that instantaneously moves due to a large amount of gas from the gas generator 16 to act on the cylinder 11 (FIG. 4).
　それゆえ、ベルト用プリテンショナー１０Ｂは、一つのシリンダ１１によっても構成でき、ピストン１２に接続した第１ケーブル１３Ａと、シリンダ１１に接続した第２ケーブル１３Ｂとを、略同時に略同量牽引して、ワイヤーケーブル１３は乗員を車両シート１に拘束する。 Therefore, the belt pretensioner 10B can also be constituted by a single cylinder 11, and pulls the first cable 13A connected to the piston 12 and the second cable 13B connected to the cylinder 11 at substantially the same amount. The wire cable 13 restrains the occupant to the vehicle seat 1.
　ベルト用プリテンショナー１０Ｂのシリンダ１１のシリンダ側ワイヤ係止部１７にも通気孔２３を設け、ガスジェネレータ１６のガス圧で移動するピストン１２の反対側のシリンダ１１内に生じる背圧を逃がして、ピストン１２とシリンダ１１の夫々の反対方向移動を円滑にさせる。６５はシートベルト４０の中間部に設けたタングプレート、６６はインナーバックルである。 A vent hole 23 is also provided in the cylinder side wire locking portion 17 of the cylinder 11 of the belt pretensioner 10B to release the back pressure generated in the cylinder 11 on the opposite side of the piston 12 moving by the gas pressure of the gas generator 16, The piston 12 and the cylinder 11 are smoothly moved in opposite directions. Reference numeral 65 denotes a tongue plate provided at an intermediate portion of the seat belt 40, and 66 denotes an inner buckle.
　シートベルト４０は、タングプレート６５をインナーバックル６６に係合させたとき、ベルトリトラクター４７の一端側の着座者の肩付近からタングプレート６５までがショルダベルト６７となり、タングプレート６５からアンカープレート４１までがラップベルト６８となる。６９はスルーアンカー、７０はケーブルガイド、７１はケーブルガイド７０内に設けたローラである。 In the seat belt 40, when the tongue plate 65 is engaged with the inner buckle 66, the shoulder belt 67 extends from the vicinity of the shoulder of the seated person on one end side of the belt retractor 47 to the tongue plate 65, and from the tongue plate 65 to the anchor plate 41. Up to this is the lap belt 68. 69 is a through anchor, 70 is a cable guide, and 71 is a roller provided in the cable guide 70.
　前記ベルトリトラクター４７は、公知の構成であり、通常シートベルト４０の引き出しを許容するが、衝撃が掛かると、シートベルト４０の引き出しをロックさせる機構を内蔵していればよい。 The belt retractor 47 has a publicly known configuration and normally allows the seat belt 40 to be pulled out, but it only needs to incorporate a mechanism that locks the seat belt 40 when the impact is applied.
　タングプレート６５も公知の構成であり、シートベルト４０に対して移動自在であるが、通常のシートベルト４０の引き出すとき等の場合にはシートベルト４０に対して移動しないように構成している。 The tongue plate 65 is also a known configuration and is movable with respect to the seat belt 40, but is configured so as not to move with respect to the seat belt 40 when the normal seat belt 40 is pulled out.
（実施例の作用）
　（プリテンショナーの作用）
　例えば、シート用プリテンショナー１０Ａおよびベルト用プリテンショナー１０Ｂとなるプリテンショナー１０は、衝撃検出装置３４が衝撃を検知すると、マイクロガスジェネレータ２８の多量のガスを発生させ、ピストン１２の一方側のシリンダ１１内に充満させ、ガス圧により瞬時にピストン１２を移動させ、ピストン１２の移動の反力がシリンダ１１に作用して、ピストン１２とシリンダ１１とは互いに反対方向に移動する。 (Operation of Example)
(Operation of pretensioner)
For example, the pretensioner 10 serving as the seat pretensioner 10 </ b> A and the belt pretensioner 10 </ b> B generates a large amount of gas from the micro gas generator 28 when the impact detection device 34 detects an impact, and the cylinder 11 on one side of the piston 12. The piston 12 is instantaneously moved by the gas pressure, and the reaction force of the movement of the piston 12 acts on the cylinder 11 so that the piston 12 and the cylinder 11 move in directions opposite to each other.
　プリテンショナー１０は、係止部Ｔに夫々係止されているワイヤーケーブル１３の第１ケーブル１３Ａと第２ケーブル１３Ｂの夫々がピストン１２とシリンダ１１により牽引され、着座者を拘束する可動部材Ｋを作動させて、着座者を拘束する。この場合、ピストン１２の移動方向側のシリンダ１１の端部にはシリンダ側ワイヤ係止部１７を設け、シリンダ側ワイヤ係止部１７は、所定長さを有する円柱状のエンドピース１９の外周面に環状の凹溝２０を形成し、凹溝２０にシリンダ１１のシリンダパイプ１８の端部をカシメ付けして固定し、エンドピース１９にはシリンダ１１の軸心方向に突き出して、先端を開口させた筒状のケーブルカシメ部２２を設けているから、ケーブルカシメ部２２にワイヤケーブル１３の端部を挿入してカシメ固定する。 The pretensioner 10 includes a movable member K that restrains a seated person by pulling the first cable 13A and the second cable 13B of the wire cable 13 that are respectively locked to the locking portion T by the piston 12 and the cylinder 11. Actuate and restrain the occupant. In this case, a cylinder-side wire locking portion 17 is provided at the end of the cylinder 11 on the moving direction side of the piston 12, and the cylinder-side wire locking portion 17 is an outer peripheral surface of a columnar end piece 19 having a predetermined length. The end of the cylinder pipe 18 of the cylinder 11 is caulked and fixed to the groove 20, and the end piece 19 protrudes in the axial direction of the cylinder 11 to open the tip. Since the cylindrical caulking portion 22 is provided, the end portion of the wire cable 13 is inserted into the caulking portion 22 and fixed.
　したがって、ワイヤケーブル１３はピストン１２の移動の反力によるシリンダ１１の移動が確実に伝達されて牽引され、着座者を拘束する可動部材Ｋを作動させる。 Therefore, the movement of the cylinder 11 due to the reaction force of the movement of the piston 12 is reliably transmitted and the wire cable 13 is pulled and operates the movable member K that restrains the seated person.
　シリンダ側ワイヤ係止部１７のエンドピース１９にはフランジ部２１を形成しているから、シリンダ側ワイヤ係止部１７のエンドピース１９をシリンダ１１のシリンダパイプ１８に挿入すると、フランジ部２１がシリンダパイプ１８の端面に当たり、この状態でシリンダパイプ１８をカシメると、シリンダパイプ１８の端部が凹溝２０に嵌合して、シリンダパイプ１８とシリンダ側ワイヤ係止部１７とが強固に固定され、固定作業も頗る容易である。 Since the flange portion 21 is formed in the end piece 19 of the cylinder side wire locking portion 17, when the end piece 19 of the cylinder side wire locking portion 17 is inserted into the cylinder pipe 18 of the cylinder 11, the flange portion 21 becomes the cylinder. When the cylinder pipe 18 is crimped in this state when it hits the end surface of the pipe 18, the end of the cylinder pipe 18 is fitted into the groove 20, and the cylinder pipe 18 and the cylinder side wire locking portion 17 are firmly fixed. And fixing work is easy.
　また、シリンダ側ワイヤ係止部１７のエンドピース１９にはシリンダ１１の軸心方向に突き出てるケーブルカシメ部２２を設け、ケーブルカシメ部２２は先端を開口させた筒状に形成しているから、ケーブルカシメ部２２にワイヤケーブル１３の端部を挿入し、ケーブルカシメ部２２の外側から圧力を掛けてカシメると、ケーブルカシメ部２２とワイヤケーブル１３とが互いに固定される。 Further, the end piece 19 of the cylinder side wire locking portion 17 is provided with a cable caulking portion 22 protruding in the axial direction of the cylinder 11, and the cable caulking portion 22 is formed in a cylindrical shape with an open end. When the end portion of the wire cable 13 is inserted into the cable crimping portion 22 and crimped by applying pressure from the outside of the cable crimping portion 22, the cable crimping portion 22 and the wire cable 13 are fixed to each other.
　この場合、ケーブルカシメ部２２はシリンダ１１のシリンダパイプ１８の軸心方向に突き出ているので、ケーブルカシメ部２２の外周に力を加えるのが容易であり、カシメ作業を頗る容易にする。 In this case, since the cable caulking portion 22 protrudes in the axial center direction of the cylinder pipe 18 of the cylinder 11, it is easy to apply a force to the outer periphery of the cable caulking portion 22 and facilitate the caulking work.
　ケーブルカシメ部２２の周囲のシリンダ側ワイヤ係止部１７のエンドピース１９にはシリンダ１１の軸心方向に貫通する通気孔２３を同心状に複数設けているから、ガスジェネレータ１６のガス圧でピストン１２が移動したとき、ピストン１２の移動方向側のシリンダ１１内に生じる背圧は通気孔２３からシリンダ１１外に効率よく逃がし、背圧を効果的に低減させ、ピストン１２の移動を円滑にし、ひいてはピストン１２の反力によるシリンダ１１の移動も円滑にする。したがって、シリンダ１１とピストン１２との双方が移動するプリテンショナー１０の作動を良好に安定させる。 The end piece 19 of the cylinder side wire locking portion 17 around the cable caulking portion 22 is provided with a plurality of concentric vent holes 23 penetrating in the axial direction of the cylinder 11. When the piston 12 moves, the back pressure generated in the cylinder 11 on the moving direction side of the piston 12 efficiently escapes from the vent hole 23 to the outside of the cylinder 11, effectively reducing the back pressure, and moving the piston 12 smoothly. As a result, the movement of the cylinder 11 by the reaction force of the piston 12 is also made smooth. Therefore, the operation of the pretensioner 10 in which both the cylinder 11 and the piston 12 move is satisfactorily stabilized.
　なお、プリテンショナー１０が作動してピストン１２の牽引移動後、ワイヤケーブル１３を引き戻す反対荷重が作用しても、ストッパ用の鋼球３６が作動して、ピストン１２の戻りを阻止する。 In addition, even if the pretensioner 10 is actuated and the opposite load is applied to pull back the wire cable 13 after the pulling movement of the piston 12, the stopper steel ball 36 is actuated to prevent the piston 12 from returning.
　　（シートボトムの移動）　
　車両シート１に着座した状態の走行中に前方から衝突されると、車体は衝突により前進が阻止されて直ちに減速し、慣性力が着座者を車両シート１に対して相対的に前方移動させるように作用するが、シートベルト４０があるため、着座者は車両シート１に拘束される。 (Seat bottom movement)
When the vehicle is collided from the front while traveling on the vehicle seat 1, the vehicle body is prevented from moving forward due to the collision and immediately decelerates, so that the inertial force moves the seated person relative to the vehicle seat 1. However, since the seat belt 40 is provided, the seated person is restrained by the vehicle seat 1.
　しかし、シートベルト４０が着座者を拘束するが、減速に伴う着座者の慣性力によってシートボトム３のクッション材（パッド）が撓むことや、シートベルト４０の弛みと伸び等の理由で、衝突時のシートベルト４０による拘束効果を向上させるには限界があり、そのため、近年、プリテンショナーにより衝突時にシートベルトを引いて拘束しようとしていたが、従来のシートベルトのみの拘束はシートベルトの左右の何れか一方の片側のみを牽引していることから、拘束力の立ち上がりをさらに早めて拘束効果を向上させるには限界があった。 However, the seat belt 40 restrains the seat occupant. However, the cushion material (pad) of the seat bottom 3 is bent due to the inertia force of the seat occupant accompanying deceleration, and the seat belt 40 is slackened and stretched. In recent years, there has been a limit to improving the restraining effect of the seat belt 40, and in recent years, the pretensioner tried to restrain the seat belt by pulling it at the time of collision. Since only one of the two sides is pulled, there is a limit in improving the restraining effect by further increasing the rise of the restraining force.
　そこで、前記可動部材Ｋをシートボトム３の移動装置とし、前記係止部Ｔを固定フレーム４６とし、前記プリテンショナー１０を車両シート１のシート用プリテンショナー１０Ａに使用したものであり、シート用プリテンショナー１０Ａにより、車両シート１のシートバック２は、そのままで、シートベルト４０とは独立させてシートボトム３のみを固定フレーム４６（スライドレール５）に対して衝突を検知すると瞬時に後方移動させるから、着座者が沈み込んで車両シート１の着座状態から前方移動する前に、瞬時にクッション材６２の撓みを積極的に発生させてクッション材６２の反力を高めながらシートボトム３を後方移動させて、拘束力の立ち上がりを早め、着座者の移動量を減少させて、着座者の車両シート１への拘束効果を向上させる。即ち、後方移動するシートボトム３の座面が着座者を支持して、着座者の車両シート１への拘束効果を向上させる。 Therefore, the movable member K is used as a moving device for the seat bottom 3, the locking portion T is used as a fixed frame 46, and the pretensioner 10 is used as a seat pretensioner 10A for a vehicle seat 1. By the tensioner 10A, the seat back 2 of the vehicle seat 1 is left as it is, independently of the seat belt 40, and only the seat bottom 3 is instantaneously moved backward when a collision with the fixed frame 46 (slide rail 5) is detected. Before the seated person sinks and moves forward from the seated state of the vehicle seat 1, the seat bottom 3 is moved backward while actively increasing the reaction force of the cushioning material 62 by positively generating the deflection of the cushioning material 62 instantly. Thus, the restraint effect on the vehicle seat 1 of the seated person can be reduced by shortening the rise of the restraining force and reducing the movement amount of the seated person. To above. That is, the seat surface of the seat bottom 3 that moves backward supports the seated person and improves the restraining effect of the seated person on the vehicle seat 1.
　この場合、車両シート１のうちシートボトム３のみが後退し、シートバック２は後方移動させないので、車両シート１の後方空間の占有する容積を最小限にでき、後席乗員に後方移動した車両シート１が衝突するという二次被害も防止できる。 In this case, only the seat bottom 3 of the vehicle seat 1 is retracted and the seat back 2 is not moved backward, so that the volume occupied by the rear space of the vehicle seat 1 can be minimized, and the vehicle seat moved backward to the rear seat occupant Secondary damage that 1 collides can also be prevented.
　シートボトム３のシートボトムフレーム５１の左右一対の側部部材５５には棒状形状の取付部材５７（取付孔５６）を設け、取付部材５７は固定フレーム４６に設けた前後に長い取付孔５６（取付部材５７）に相対的に移動自在に挿通しているから、シートボトム３は、シートボトムフレーム５１が固定フレーム４６に対して後方移動する。したがって、シートボトム３の後方移動によりシートボトム３の座面が着座者をより確実に支持して、着座者の車両シート１への拘束効果を向上させる。 A pair of left and right side members 55 of the seat bottom frame 51 of the seat bottom 3 is provided with a rod-shaped attachment member 57 (attachment hole 56), and the attachment member 57 is provided with a long attachment hole 56 (attachment) at the front and rear provided in the fixed frame 46. Since the member 57) is inserted so as to be relatively movable, the seat bottom frame 51 moves the seat bottom frame 51 backward relative to the fixed frame 46. Therefore, the seat bottom 3 more reliably supports the seat occupant by the rearward movement of the seat bottom 3 and improves the restraining effect of the seat occupant on the vehicle seat 1.
　この場合、シートボトムフレーム５１の前側部分は、アーム５８により上下自在に取付けているから、衝突時のシートボトム３が後退するとき、シートボトム３の前端を上昇させながら後退させるようにでき、着座者の臀部の下方のシートボトム３の座面が高くなって、一層、クッション材６２の反力を高め、シートベルト４０による着座者の拘束効果のさらなる向上を図ることができ、好適である。 In this case, since the front portion of the seat bottom frame 51 is mounted up and down freely by the arm 58, when the seat bottom 3 retracts at the time of collision, it can be retracted while raising the front end of the seat bottom 3, It is preferable that the seating surface of the seat bottom 3 below the user's buttocks becomes higher, and the reaction force of the cushioning material 62 can be further increased and the restraining effect of the seated person by the seat belt 40 can be further improved.
　シートボトム３のシートボトムフレーム５１の側部部材５５の後部には、左右一対のワイヤケーブル１３の第１ケーブル１３Ａと第２ケーブル１３Ｂの夫々の基部の夫々を係止し、ワイヤーケーブル１３の第１ケーブル１３Ａと第２ケーブル１３Ｂの何れか一方の先端は、シート用プリテンショナー１０Ａのシリンダ１１内に設けたピストン１２側に接続し、第１ケーブル１３Ａと第２ケーブル１３Ｂの何れか他方の先端はシリンダ１１のシリンダ側ワイヤ係止部１７に接続しているから、車体所望位置に設けた衝撃検出装置３４により衝撃を検知すると、シート用プリテンショナー１０Ａは、ガス発生剤により多量のガスを発生させ、ワイヤケーブル１３によりシートボトムフレーム５１を牽引して、シートボトム３を後方移動させる。 The rear portions of the side members 55 of the seat bottom frame 51 of the seat bottom 3 are engaged with the respective base portions of the first cable 13A and the second cable 13B of the pair of left and right wire cables 13, respectively. One end of either the first cable 13A or the second cable 13B is connected to the piston 12 side provided in the cylinder 11 of the seat pretensioner 10A, and the other end of either the first cable 13A or the second cable 13B. Is connected to the cylinder side wire locking portion 17 of the cylinder 11, so that when the impact is detected by the impact detection device 34 provided at the desired position of the vehicle body, the seat pretensioner 10A generates a large amount of gas by the gas generating agent. Then, the seat bottom frame 51 is pulled by the wire cable 13 to move the seat bottom 3 backward.
　シート用プリテンショナー１０Ａのシリンダ１１は、車両シート１に対してワイヤーケーブル１３の牽引方向とシリンダ１１の軸芯が並行となるように位置させ、かつ、シリンダ１１の軸芯方向にのみ移動自在にシリンダ１１を設置しているから、ガスジェネレータ１６のガスにより移動するピストン１２の反力が移動自在のシリンダ１１に作用し、ピストン１２とシリンダ１１とが互いに反対に夫々移動する。 The cylinder 11 of the seat pretensioner 10 </ b> A is positioned so that the pulling direction of the wire cable 13 and the axis of the cylinder 11 are parallel to the vehicle seat 1, and is movable only in the direction of the axis of the cylinder 11. Since the cylinder 11 is installed, the reaction force of the piston 12 moved by the gas of the gas generator 16 acts on the movable cylinder 11, and the piston 12 and the cylinder 11 move in opposite directions.
　ピストン１２に接続した第１ケーブル１３Ａと、シリンダ１１に接続した第２ケーブル１３Ｂとは、略同時に略同量牽引されて、シートボトムフレーム５１を後方移動させることができ、着座者拘束機構の構成部品点数を少なくして、安価に提供できる。 The first cable 13 </ b> A connected to the piston 12 and the second cable 13 </ b> B connected to the cylinder 11 can be pulled at substantially the same amount at the same time to move the seat bottom frame 51 backward, and the configuration of the seat occupant restraint mechanism The number of parts can be reduced and provided at low cost.
　この場合、シート用プリテンショナー１０Ａのピストン１２の移動方向側のシリンダ１１の端部にはシリンダ側ワイヤ係止部１７を設け、シリンダ側ワイヤ係止部１７は所定長さを有する円柱状のエンドピース１９の外周面に環状の凹溝２０を形成しているから、凹溝２０にシリンダ１１のシリンダパイプ１８の端部をカシメ付けして固定すると、シート用プリテンショナー１０Ａのシリンダ側ワイヤ係止部１７の固定を容易に行える。 In this case, a cylinder-side wire locking portion 17 is provided at the end of the cylinder 11 on the moving direction side of the piston 12 of the seat pretensioner 10A, and the cylinder-side wire locking portion 17 has a cylindrical end having a predetermined length. Since the annular groove 20 is formed on the outer peripheral surface of the piece 19, when the end of the cylinder pipe 18 of the cylinder 11 is caulked and fixed to the groove 20, the cylinder side wire locking of the seat pretensioner 10A is performed. The part 17 can be fixed easily.
　シート用プリテンショナー１０Ａのシリンダ１１のシリンダ側ワイヤ係止部１７のエンドピース１９にはシリンダ１１の軸心方向に突き出てる先端を開口させた筒状のケーブルカシメ部２２を設け、ケーブルカシメ部２２にワイヤケーブル１３の端部を挿入してカシメ固定するから、ワイヤケーブル１３はシート用プリテンショナー１０Ａのピストン１２の移動の反力によるシリンダ１１の移動が確実に伝達されて牽引され、着座者を拘束するシート用プリテンショナー１０Ａの作動を確実にする。 The end piece 19 of the cylinder side wire locking portion 17 of the cylinder 11 of the seat pretensioner 10 </ b> A is provided with a cylindrical cable caulking portion 22 having an open end projecting in the axial direction of the cylinder 11, and the cable caulking portion 22. Since the end of the wire cable 13 is inserted and fixed by caulking, the wire cable 13 is reliably pulled by the movement of the cylinder 11 due to the reaction force of the movement of the piston 12 of the seat pretensioner 10A. The operation of the restraint sheet pretensioner 10A is ensured.
　この場合、シート用プリテンショナー１０Ａのシリンダ１１のケーブルカシメ部２２の周囲のシリンダ側ワイヤ係止部１７のエンドピース１９にはシリンダ１１の軸心方向に貫通する通気孔２３を同心状に複数設けているから、ガスジェネレータ１６のガス圧でピストン１２が移動したとき、ピストン１２の移動方向側のシリンダ１１内に生じる背圧は通気孔２３からシリンダ１１外に逃がし、背圧を効果的に低減させ、ピストン１２の移動を円滑にし、ひいてはピストン１２の反力によるシリンダ１１の移動も円滑にする。したがって、シリンダ１１とピストン１２との双方が移動して、一つのシリンダ１１によりシート用プリテンショナー１０Ａを構成したときに、特に、作動を良好に安定させて、有効に作用させられる合理的な構成にできる。 In this case, the end piece 19 of the cylinder side wire locking portion 17 around the cable caulking portion 22 of the cylinder 11 of the seat pretensioner 10A is provided with a plurality of concentric vent holes 23 penetrating in the axial direction of the cylinder 11. Therefore, when the piston 12 is moved by the gas pressure of the gas generator 16, the back pressure generated in the cylinder 11 on the moving direction side of the piston 12 is released from the vent hole 23 to the outside of the cylinder 11, and the back pressure is effectively reduced. Therefore, the movement of the piston 12 is made smooth, and the movement of the cylinder 11 by the reaction force of the piston 12 is also made smooth. Therefore, when both the cylinder 11 and the piston 12 move and the seat pretensioner 10 </ b> A is constituted by one cylinder 11, in particular, a rational configuration that can be effectively operated with a stable operation. Can be.
　また、シート用プリテンショナー１０Ａは、シリンダ１１をシートボトム３のシートボトムフレーム５１の前側下面下方に配置し、シリンダ１１の軸芯方向が左右方向となるように配置しているから、この車両シート１の後方の車両シート１に着座した着座者の脚入れ性を犠牲にせず、着座者拘束機構を設置でき、他方では、シート用プリテンショナー１０Ａの作動を良好かつ確実にできる。 Further, in the seat pretensioner 10A, the cylinder 11 is arranged below the front lower surface of the seat bottom frame 51 of the seat bottom 3, and the axial center direction of the cylinder 11 is arranged in the left-right direction. The seater restraint mechanism can be installed without sacrificing the legability of the seated person seated on the vehicle seat 1 behind 1, and on the other hand, the operation of the seat pretensioner 10A can be performed reliably and reliably.
　（シートベルトの作動）
　前記可動部材Ｋを、シートベルト４０の全体の張力を緊張させるシートベルト緊張装置とし、アンカープレート４１またはインナーラップアンカー４２を前記係止部Ｔとし、シートベルト４０を緊張させるベルト用プリテンショナー１０Ｂを、前記プリテンショナー１０により構成し、一層、着座者の車両シート１への拘束効果を向上させたものである。 (Seat belt operation)
The movable member K is a seat belt tensioning device that tensions the entire tension of the seat belt 40, the anchor plate 41 or the inner wrap anchor 42 is the locking portion T, and the belt pretensioner 10B that tensions the seat belt 40 is provided. The pretensioner 10 is used to further improve the restraining effect of the seated person on the vehicle seat 1.
　シートベルト４０は、ベルト用プリテンショナー１０Ｂにより左右のアンカープレート４１またはインナーラップアンカー４２の両方に牽引されて、シートベルト４０の全体の張力を緊張させるように構成し、ベルト用プリテンショナー１０Ｂは、車体所望位置に設けた衝撃検出装置により衝撃を検知すると、ガス発生剤による多量の高圧ガスのガス圧で瞬時にワイヤーケーブル１３を牽引して、シートベルト４０を緊張させ、乗員を車両シート１に拘束する。 The seat belt 40 is configured to be pulled by both the left and right anchor plates 41 or the inner wrap anchors 42 by the belt pretensioner 10B to tension the entire tension of the seatbelt 40, and the belt pretensioner 10B When an impact is detected by the impact detection device provided at the desired position of the vehicle body, the wire cable 13 is instantaneously pulled by the gas pressure of a large amount of high-pressure gas by the gas generating agent, the seat belt 40 is tensioned, and the occupant is attached to the vehicle seat 1. to bound.
　ワイヤーケーブル１３の第１ケーブル１３Ａと第２ケーブル１３Ｂの何れか一方は、ベルト用プリテンショナー１０Ｂのシリンダ１１内に設けたピストン１２に接続し、第１ケーブル１３Ａと第２ケーブル１３Ｂの何れか他方はシリンダ１１のシリンダ側ワイヤ係止部１７のケーブルカシメ部２２に接続しているから、ベルト用プリテンショナー１０Ｂの一つのシリンダ１１により、略同時に左右のアンカープレート４１およびインナーラップアンカー４２を牽引し、乗員を車両シート１に拘束する。 One of the first cable 13A and the second cable 13B of the wire cable 13 is connected to the piston 12 provided in the cylinder 11 of the belt pretensioner 10B, and the other of the first cable 13A and the second cable 13B. Is connected to the cable caulking portion 22 of the cylinder side wire locking portion 17 of the cylinder 11, so that the left and right anchor plates 41 and the inner wrap anchors 42 are pulled substantially simultaneously by one cylinder 11 of the belt pretensioner 10B. The passenger is restrained to the vehicle seat 1.
　即ち、ベルト用プリテンショナー１０Ｂのシリンダ１１は、車両シート１または車体に対してワイヤーケーブル１３の牽引方向とシリンダ１１の軸芯が並行となるように位置させ、かつ、シリンダ１１の軸芯方向にのみ移動自在にシリンダ１１を設置させているから、ガスジェネレータ１６の多量のガスにより瞬時に移動するピストン１２の反力がシリンダ１１に作用して、ピストン１２とシリンダ１１とは互いに反対方向に移動する。 That is, the cylinder 11 of the belt pretensioner 10B is positioned so that the pulling direction of the wire cable 13 and the axis of the cylinder 11 are parallel to the vehicle seat 1 or the vehicle body, and in the axis direction of the cylinder 11. Since the cylinder 11 is installed only movably, the reaction force of the piston 12, which is instantaneously moved by a large amount of gas from the gas generator 16, acts on the cylinder 11, and the piston 12 and the cylinder 11 move in opposite directions. To do.
　そのため、第１ケーブル１３Ａと第２ケーブル１３Ｂのそれぞれは、略同時に左右のアンカープレート４１およびインナーラップアンカー４２を牽引し、乗員を車両シート１に拘束する。 Therefore, each of the first cable 13A and the second cable 13B pulls the left and right anchor plates 41 and inner wrap anchors 42 substantially simultaneously, and restrains the occupant to the vehicle seat 1.
　この場合、ベルト用プリテンショナー１０Ｂのシリンダ１１のケーブルカシメ部２２の周囲のシリンダ側ワイヤ係止部１７のエンドピース１９にはシリンダ１１の軸心方向に貫通する通気孔２３を同心状に複数設けているから、ガスジェネレータ１６のガス圧でピストン１２が移動したとき、ピストン１２の移動方向側のシリンダ１１内に生じる背圧は通気孔２３からシリンダ１１外に逃がし、背圧を効果的に低減させ、ピストン１２の移動を円滑にし、ひいてはピストン１２の反力によるシリンダ１１の移動も円滑にする。 In this case, the end piece 19 of the cylinder side wire locking portion 17 around the cable caulking portion 22 of the cylinder 11 of the belt pretensioner 10B is provided with a plurality of concentric vent holes 23 penetrating in the axial direction of the cylinder 11. Therefore, when the piston 12 is moved by the gas pressure of the gas generator 16, the back pressure generated in the cylinder 11 on the moving direction side of the piston 12 is released from the vent hole 23 to the outside of the cylinder 11, and the back pressure is effectively reduced. Therefore, the movement of the piston 12 is made smooth, and the movement of the cylinder 11 by the reaction force of the piston 12 is also made smooth.
　したがって、シリンダ１１とピストン１２との双方が移動して、一つのシリンダ１１によりベルト用プリテンショナー１０Ｂを構成したときに、特に、作動を良好に安定させて、有効に作用させられる合理的な構成にできる。 Accordingly, when both the cylinder 11 and the piston 12 are moved and the belt pretensioner 10B is constituted by the single cylinder 11, a rational configuration that can be effectively operated with particularly stable operation. Can be.

Claims (5)

  1. 第１ケーブルが連結されるシリンダと、前記シリンダ内を移動し第２ケーブルが連結されるピストンと、前記シリンダ内の膨張チャンバーにガスを供給して前記ピストンは第１方向に前記シリンダは前記第１方向とは反対の第２方向に移動させるガスジェネレータとを有するプリテンショナーにおいて、前記シリンダには前記第１ケーブルの端部を接続固定するシリンダ側ワイヤ係止部を設け、該シリンダ側ワイヤ係止部は、所定長さを有する円柱状のエンドピースと、前記エンドピースから前記シリンダの軸心方向外側に突き出て先端を開口させた筒状のケーブルカシメ部とを有し、前記第１ケーブルの前記端部は、前記ケーブルカシメ部に挿入してカシメ固定した車両シートのプリテンショナー。 A cylinder to which the first cable is connected, a piston that moves in the cylinder and is connected to the second cable, and gas is supplied to an expansion chamber in the cylinder so that the piston is in the first direction. In the pretensioner having a gas generator that moves in a second direction opposite to the one direction, the cylinder is provided with a cylinder side wire locking portion for connecting and fixing the end of the first cable, and the cylinder side wire engagement The stop portion has a cylindrical end piece having a predetermined length, and a cylindrical cable caulking portion protruding from the end piece to the outside in the axial direction of the cylinder and having an open end, and the first cable The end portion of the vehicle seat is a pretensioner for a vehicle seat that is inserted into the cable caulking portion and fixed by caulking.
  2. 請求項１において、前記ケーブルカシメ部の周囲のシリンダ側ワイヤ係止部の前記エンドピースには、シリンダの軸心方向に貫通する通気孔を同心状に複数設けた車両シートのプリテンショナー。 2. The vehicle seat pretensioner according to claim 1, wherein the end piece of the cylinder side wire locking portion around the cable caulking portion is provided with a plurality of concentric vent holes penetrating in the axial direction of the cylinder.
  3. 請求項１または請求項２において、前記シリンダ側ワイヤ係止部のエンドピースの外周面には環状の凹溝を形成し、前記凹溝のシリンダの軸心方向の外側のエンドピースには前記シリンダのシリンダパイプの端部が当接するフランジ部を設けた車両シートのプリテンショナー。 3. The annular groove is formed in the outer peripheral surface of the end piece of the cylinder side wire locking portion according to claim 1, and the cylinder is formed on the end piece in the axial direction of the cylinder of the groove. A vehicle seat pretensioner provided with a flange portion against which an end of the cylinder pipe abuts.
  4. 請求項１または請求項２において、前記車両シートの可動部材は車両シートのシートボトムの移動装置とし、前記係止部は固定側に設けた固定フレームとし、前記プリテンショナーは前記シートボトムを後方移動させるシート用プリテンショナーとし、シート用プリテンショナーは、車体が所定以上の加速を受けると、シート用プリテンショナーの前記シリンダおよび前記ピストンの移動を前記ワイヤケーブルにより伝達して前記固定フレームに対して前記シートボトムが後方移動するように構成し、前記ワイヤーケーブルの一対の第１ケーブルと第２ケーブルの一端は前記固定フレームに係止し、該第１ケーブルと第２ケーブルの他端は前記ピストンと前記シリンダのシリンダ側ワイヤ係止部の夫々に接続した車両シートのプリテンショナー。 3. The movable member of the vehicle seat according to claim 1 or 2, wherein the movable member of the vehicle seat is a moving device of a seat bottom of the vehicle seat, the locking portion is a fixed frame provided on a fixed side, and the pretensioner moves the seat bottom backward. The seat pretensioner is configured to transmit the movement of the cylinder and the piston of the seat pretensioner by the wire cable when the vehicle body is subjected to acceleration of a predetermined level or more. The seat bottom is configured to move backward, one end of the pair of the first cable and the second cable of the wire cable is locked to the fixed frame, and the other end of the first cable and the second cable is connected to the piston. A vehicle seat pretensioner connected to each of the cylinder side wire locking portions of the cylinder .
  5. 請求項１または請求項２において、前記車両シートの可動部材は車両シートの着座者を拘束するシートベルトとし、前記係止部はシートベルトのアンカープレートおよびインナーラップアンカーとし、前記プリテンショナーはシートベルトを緊張させるベルト用プリテンショナーとし、該ベルト用プリテンショナーは、所定以上の加速度を受けると、ベルト用プリテンショナーのピストンの移動を前記ワイヤケーブルにより伝達して乗員を拘束させる方向にシートベルトが移動するように構成し、前記ワイヤーケーブルの一対の第１ケーブルと第２ケーブルの一端は前記アンカープレートおよびインナーラップアンカーに係止し、該第１ケーブルと第２ケーブルの他端は前記ピストンと前記シリンダのシリンダ側ワイヤ係止部の夫々に係止した車両シートのプリテンショナー。 3. The movable member of the vehicle seat according to claim 1, wherein the movable member of the vehicle seat is a seat belt that restrains a seated person of the vehicle seat, the locking portion is an anchor plate and an inner wrap anchor of the seat belt, and the pretensioner is a seat belt. When the belt pretensioner receives an acceleration exceeding a predetermined level, the belt pretensioner transmits the movement of the belt pretensioner piston through the wire cable and moves the seat belt in a direction to restrain the occupant. One end of the pair of the first cable and the second cable of the wire cable is locked to the anchor plate and the inner wrap anchor, and the other end of the first cable and the second cable is the piston and the Lock to each cylinder side wire locking part of the cylinder. Vehicle seat pre-tensioners.
PCT/JP2008/073335 2007-12-21 2008-12-22 Pretensioner for vehicle seat WO2009081909A1 (en)

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JP2007-331154 2007-12-21
JP2007331154A JP5170631B2 (en) 2007-12-21 2007-12-21 Vehicle seat

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007210352A (en) * 2006-02-06 2007-08-23 T S Tec Kk Vehicular seat

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007210352A (en) * 2006-02-06 2007-08-23 T S Tec Kk Vehicular seat

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