WO2009081917A1 - Pretensioner for vehicle seat - Google Patents

Pretensioner for vehicle seat Download PDF

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Publication number
WO2009081917A1
WO2009081917A1 PCT/JP2008/073359 JP2008073359W WO2009081917A1 WO 2009081917 A1 WO2009081917 A1 WO 2009081917A1 JP 2008073359 W JP2008073359 W JP 2008073359W WO 2009081917 A1 WO2009081917 A1 WO 2009081917A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder
cable
piston
pretensioner
seat
Prior art date
Application number
PCT/JP2008/073359
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 WO2009081917A1 publication Critical patent/WO2009081917A1/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.
  • the wire cable passes through the expansion chamber in the cylinder and is connected to the piston. For this reason, it was difficult to maintain the airtightness of the expansion chamber. In other words, since the wire cable penetrates the hermetic cap that scouts the end of the cylinder, it is necessary to ensure smooth movement of the wire cable relative to the hermetic cap while maintaining the hermeticity between the wire cable and the hermetic cap. did not become.
  • an object of the present invention is to provide a pretensioner that overcomes the above problems.
  • the perspective view of a vehicle seat. 1 is a cross-sectional view of a pretensioner according to the present invention.
  • the perspective view of the piston of 3rd Example. Schematic which shows arrangement
  • FIG. 3 is a schematic plan view of a cylinder and a cable guide of a seat pretensioner and a belt pretensioner.
  • 1 is a vehicle seat
  • 2 is a seat back of the vehicle seat 1
  • 3 is a seat bottom
  • 4 is a headrest provided on the upper portion of the seat back 2
  • 5 is a vehicle seat 1 on the vehicle body. It is a slide rail that is moved relative to it.
  • the vehicle seat 1 is provided with a pretensioner 10 that ignites the gas generating agent to generate a large amount of gas 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 one of the pair of first cable 13A and second cable 13B of the wire cable 13 is connected to the piston 12 side.
  • One end of the other of the first cable 13 ⁇ / b> A and the second cable 13 ⁇ / b> B is connected to the cylinder-side wire locking portion 17 of the cylinder 11.
  • the other ends of the first cable 13A and the second cable 13B are connected to the locking portion T, respectively.
  • 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 arbitrary, and the gas generator 16 is provided outside the cylinder 11 in the embodiments of FIGS.
  • the gas generator 16 has a micro gas generator (MGG) 28, which is not shown, but contains a gas generating agent that generates gas inside the micro gas generator 28, and generates a high-pressure gas with the gas generating agent.
  • MMG micro gas generator
  • the piston 12 is moved by the gas pressure of the high pressure gas.
  • the micro gas generator 28 of the gas generator 16 is provided on the outer surface of the end portion of the cylinder 11 provided on the opposite side of the cylinder side wire locking portion 17.
  • the micro gas generator 28 faces the gas ejection chamber (expansion chamber) 20 in the cylinder 11.
  • the piston 12 faces the gas ejection chamber 20, and a piston rod 21 is attached to the piston 12.
  • a wire cable 13 is connected to the piston rod 21.
  • a wire cable 13 is connected to the piston 12 via a piston rod 21.
  • the piston rod 21 is movably attached to the cylinder 11.
  • the piston rod 21 is movably inserted into the cylinder member (seal extension portion) 22 of the cylinder 11.
  • the cylindrical member 22 has its base attached to the cylinder 11, and the distal end of the cylindrical member 22 is opened into the gas ejection chamber 20.
  • the cylindrical member 22 is formed integrally with the micro gas generator housing 23 and the tip of the cylindrical member 22 is positioned at a predetermined position in the cylinder 11.
  • the configuration is arbitrary, and may be separate from the micro gas generator housing 23.
  • a piston mounting portion 24 provided with a screw groove or the like is provided at one end of the piston rod 21, and the piston 12 is attached to the piston mounting portion 24 in a close contact state.
  • a cable crimping portion 25 is provided at the other end of the piston rod 21, and the end of the wire cable 13 is locked to the cable crimping portion 25.
  • the piston 12 has a large diameter portion 26 that is in sliding contact with the inner periphery of the cylinder 11.
  • the large-diameter portion 26 is formed in an umbrella shape, is formed in a cylindrical shape that closes the cylinder-side wire locking portion 17 side of the large-diameter portion 26 and opens the micro gas generator housing 23 side.
  • An O-ring 38 is provided at the tip of the cylindrical member 22, and the O-ring 38 is brought into close contact with the outer surface of the piston rod 21. That is, the wire cable 13 for transmitting the movement of the piston 12 of the cylinder 11 is not directly connected to the piston 12, but is connected to the piston 12 via the piston rod 21, and the outer surface of the piston rod 21 is formed smoothly.
  • the adhesion between the rod 21 and the O-ring 38 of the cylindrical member 22 is improved, and the gas generated from the gas generator 16 is prevented from leaking from the cylinder 11 as much as possible.
  • the O-ring 38 is provided on the inner peripheral surface of the cylindrical member 22 to prevent the O-ring 38 from being exposed to the gas by being exposed in the gas ejection chamber 20.
  • the cylindrical member 22 is provided inside the cylinder 11 on the opposite side of the cylinder side wire locking portion 17 of the cylinder 11 in parallel with the axial direction of the cylinder 11.
  • the cylindrical member 22 is formed to have a predetermined length, and the length of the piston rod 21 is shorter than the length of the cylinder 11. Therefore, even if the piston rod 21 moves together with the piston 12, the cylinder member 22 surrounds the outer periphery of the piston rod 21, thereby preventing gas leakage from the cylinder 11.
  • the length of the cylindrical member 22 when the length of the cylindrical member 22 is increased, the moving amount of the piston 12 in the cylinder 11 is shortened. Therefore, the length of the cylindrical member 22 can be set within a range that is restricted by the moving amount of the piston 12 in the cylinder 11. It is configured to be as long as possible.
  • the length of the piston rod 21 is shortened by the length of the cylindrical member 22, and the length of the piston rod 21 exposed to the outside from the cylinder 11 is shortened.
  • the length of the piston rod 21 is configured to be shorter than the distance (the pulling length of the wire cable 13) that the piston 12 moves. This also shortens the length of the piston rod 21 exposed from the cylinder 11 to the outside. Accordingly, the combined length of the cylindrical member 22 and the piston rod 21 is configured to be longer than the distance that the piston 12 moves (the pulling length of the wire cable 13), and the piston rod 21 is the most micro gas generator housing 23.
  • the cable caulking portion 25 of the piston rod 21 remains in the cylindrical member 22 even when the piston rod 21 moves far from the cylinder, and the gas generated from the gas generator 16 by the O-ring 38 of the cylindrical member 22 is prevented from leaking from the cylinder 11. .
  • the piston rod 21 is formed to have the same diameter or larger diameter than the wire cable 13 so that the end of the wire cable 13 can enter the cylindrical member 22.
  • the coupler 32 is connected to the micro gas generator 28 of the gas generator 16.
  • the harness 33 connected to the coupler 32 is connected to an impact detection device 34 provided at a desired position of the vehicle body.
  • the impact detection device 34 detects an impact
  • the micro gas generator 28 generates a large amount of gas, and this large amount of gas is generated.
  • the gas ejection chamber 20 in the cylinder 11 on one side of the piston 12 is filled, the piston 12 is instantaneously moved by the gas pressure at this time, and the wire cable 13 is pulled through the piston rod 21 to operate the pretensioner 10.
  • An O-ring 35 is provided on the large diameter portion 26 of the piston 12. Further, the large diameter portion 26 of the piston 12 is formed with an inclined surface 37 that gradually becomes smaller in diameter from the large diameter portion 26 toward the cylinder side wire locking portion 17, and between the inclined surface 37 and the inner peripheral surface of the cylinder 11. A steel ball 36 for stopper that stops the return movement of the piston 12 is built in the space between them.
  • the gas generator 16 is provided in the cylinder 11. Specifically, the gas generator 16 is provided on the piston 12.
  • the piston 12 forms a rod fixing portion 27 that fixes the piston mounting portion 24 of the piston rod 21 on one side of the large diameter portion 26 that is in sliding contact with the inner periphery of the cylinder 11.
  • the large-diameter portion 26 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 (in FIG. 5 and FIG. 6, it is easy to understand). For this reason, the micro gas generator 28 is displayed with fine dots, but the configuration is not limited thereby). 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.
  • MMGG micro gas generator
  • the piston 12 forms a gas outlet 29 on one side of the large-diameter portion 26, and forms a cylinder 11 on the gas ejection direction side of the gas outlet 29 in the gas ejection chamber 20.
  • a cylinder member 22 is provided in the gas ejection chamber 20, and the cylinder member 22 is provided in a housing member 23 ⁇ / b> A provided at the end of the cylinder 11 on the gas ejection chamber 20 side.
  • 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. When the impact detection device 34 detects an impact, the micro gas generator 28 is operated to generate a large amount of gas.
  • the gas is filled into the cylinder 11 on one side of the piston 12 from the gas outlet 29, and the piston 12 is instantaneously moved by the gas pressure at this time to pull the wire cable 13 to operate the pretensioner 10.
  • An O-ring 35 is provided on the large diameter portion 26 of the piston 12.
  • an inclined surface 37 is formed which has a smaller diameter than the large diameter portion 26 and increases in diameter toward the cylinder side wire locking portion 17 side.
  • a stopper steel ball 36 for stopping the return movement of the piston 12 is built in the space between the inclined surface 37 and the inner peripheral surface of the cylinder 11.
  • a cable guide 61 is provided at an intermediate position between the cylinder 11 and the locking portion T of the pretensioner 10 to convert the movement direction of the wire cable 13 by the cylinder 11 and the piston 12 in the front-rear direction (FIG. 8). ).
  • the cylinder 11 and the locking portion T are arranged so that the wire cable 13 extends in the axial direction of the cylinder 11 so that the axial direction of the cylinder 11 is the left-right direction of the vehicle seat 1. They are respectively arranged so as to be pulled in the crossing direction, and in the middle position between the cylinder 11 and the locking portion T, the movement direction of the wire cable 13 in the left-right direction by the cylinder 11 and the piston 12 is the front-rear direction.
  • the cable guide 61 to be converted is provided.
  • a reinforcing frame 90 is provided between the left and right cable guides 61 to prevent the distance between the left and right cable guides 61 from becoming narrow. What is necessary is just to fix the cable guide 61 and the reinforcement frame 90 to arbitrary fixing
  • the cable guides 61 may be fixed to the left and right side portions of the reinforcing frame 90, respectively.
  • the movable member K is a moving device for the seat bottom 3
  • the locking portion T is a fixed frame 46 to be described later
  • the pretensioner 10 is used as the seat pretensioner 10A 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 from the gas generating agent of the gas generator 16 and instantaneously pulls the wire cable 13 by this large amount of gas. Then, the seat back 2 is left as it is, independently of the seat belt 40, and only the seat bottom 3 is moved backward in the event of a collision with the seat back 2 to improve the restraint of the seated person.
  • 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 move backward within a predetermined range.
  • the fixed frame 46 is used as the locking portion T, and the first cable 13A and the second cable 13B of the pair of left and right wire cables 13 are locked to the fixed frame 46, respectively.
  • One of the ends of the cable 13A and the second cable 13B is connected to the piston 12 (piston rod 21) provided in the cylinder 11 of the seat pretensioner 10A, and either the first cable 13A or the second cable 13B is connected. The other is connected to the end of the cylinder 11.
  • the seat pretensioner 10 ⁇ / b> A pulls the first cable 13 ⁇ / b> A and the second cable 13 ⁇ / b> B of the wire cable 13 with one cylinder 11 and the piston 12, pulls the seat bottom frame 51 substantially at the same time, and moves the seat bottom 3 backward. Move.
  • 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, and in the axis direction of the cylinder 11.
  • the seat bottom 3 is configured to be movably installed, and the seat bottom 3 is moved backward by one cylinder 11.
  • the cable guide 61 converts the moving direction of the first cable 13A and the second cable 13B pulled by the piston 12 and the cylinder 11 in the left-right direction into the front-rear direction so that the seat bottom 3 moves backward. (FIGS. 10 and 11).
  • the cylinder 11 of the seat pretensioner 10A is formed to have a predetermined length, and is arranged with a moving space for pulling a required amount of the wire cable 13 between the left and right cable guides 61. That is, it is set in consideration of the diameter and length of the cylinder 11 and the pulling amount of the wire cable 13 so that the movement amount of the cylinder 11 is accommodated between the left and right cable guides 61.
  • the cylinder 11 is positioned between the left and right cable guides 61, but the micro gas generator housing 23 of the cylinder 11 and the cable guide 61 are larger than the distance h between the cylinder side wire locking portion 17 of the cylinder 11 and the cable guide 61. Is arranged so that the distance H between the
  • the distance H between the cable caulking portion 25 of the piston rod 21 of the cylinder 11 and the cable guide 61 is made wider than the distance h between the cylinder side wire locking portion 17 of the cylinder 11 and the cable guide 61. Arrange the configuration. Therefore, a predetermined interval is previously provided between the cable crimping portion 25 of the piston rod 21 and the cable guide 61, and the wire cable 13 is connected between the cable crimping portion 25 of the piston rod 21 of the cylinder 11 and the cable guide 61. Then, the pulling direction of the wire cable 13 is smoothly changed by the cable guide 61.
  • the cylinder 11 is provided in a suspended state by the first cable 13A and the second cable 13B between the left and right cable guides 61. Therefore, the cylinder 11 is supported by the wire cable 13.
  • the specific movement configuration of the seat bottom 3 is arbitrary, in an example shown in FIGS. 1 and 9, rod-like shapes 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.
  • the attachment member 57 is provided, and the attachment member 57 is engaged with the attachment holes 56 provided in the fixed frame 46, respectively.
  • the mounting hole 56 is formed in the rear part of the pair of left and right side members 55 of the seat bottom frame 51, and the mounting hole 56 is a rod-shaped member provided in the fixed frame 46.
  • the front portion of the seat bottom frame 51 is rotated around the upper portion of the arm 58 by the shaft 59 without depending on the mounting hole 56 and the mounting member 57, as shown in FIGS.
  • the lower part of the arm 58 is rotatably attached to the fixed frame 46 by a shaft 60. Therefore, when the seat bottom 3 is retracted at the time of a collision, it can be retracted while raising the front end of the seat bottom 3, and it is possible to further improve the restraining effect of the seated person by the seat belt 40, which is preferable. .
  • 47 is a belt retractor
  • 62 is a cushion 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 anchor plate 41 and the inner wrap anchor 42 of the seat belt 40 are the locking portions T, and the belt pretensioner that tensions the seat belt 40.
  • 10B is constituted by the pretensioner 10 to further improve the restraining effect of the seated person on the vehicle seat 1.
  • the base portions (locking portions T) of the left and right anchor plates 41 and the inner wrap anchor 42 are locked with the base portions of the first cable 13A and the second cable 13B of the pair of left and right wire cables 13, respectively.
  • the ends of the first cable 13A and the second cable 13B of the wire cable 46 are attached to the cylinder 11 and the piston 12 of the belt pretensioner 10B.
  • the belt pretensioner 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 pretensioner 10B generates a large amount of gas by the gas generating agent and pulls the wire cable 13 instantaneously by the gas pressure, thereby causing the seat belt 40 to Is configured to restrain the occupant to the vehicle seat 1.
  • the belt pretensioner 10B pulls the first cable 13A and the second cable 13B of the wire cable 13 by one cylinder 11 (piston 12), and at the same time, the left and right anchor plates. 41 and the inner wrap anchor 42 are pulled, and an occupant is restrained to the vehicle seat 1.
  • the cylinder 11 of the belt pretensioner 10B is positioned so that the axis of the cylinder 11 is parallel to the pulling direction of the wire cable 13 with respect 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.
  • 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. 3).
  • the cable guides (belt cable guides) 61 are provided in the intermediate portions of the belts.
  • the belt cable guide 61 is formed in substantially the same shape as the cable guide 61 and is fixed to an arbitrary fixing portion. That is, when the left and right anchor plates 41 and the inner wrap anchors 42 of the seat belt 40 are attached to a pair of left and right fixed frames 46 provided on the left and right upper rails 35 of the slide rail 5, the left and right belt cable guides 61 and the reinforcement frame 90 is fixedly attached to the fixed frame 46 or the upper rail 35 (FIG. 15).
  • the fixed frame 46 is moved up and down with respect to the upper rail 35. Therefore, the left and right anchor plates 41 and the inner wrap anchors 42 are attached to the upper rail 35 instead of the fixed frame 46 so that the load applied to the seat belt 40 is supported by the slide rail 5 and the belt cable guide 61 and The reinforcing frame 90 is also attached to the upper rail 35 side.
  • the cylinder 11 of the belt pretensioner 10B is also formed in a predetermined length, and is arranged with a moving space for pulling a required amount of the wire cable 13 between the left and right cable guides 61.
  • the cylinder 11 is set in consideration of the diameter and length of the cylinder 11 and the pulling amount of the wire cable 13 so that the moving amount of the cylinder 11 is accommodated between the left and right cable guides 61.
  • the cylinder 11 is positioned between the left and right cable guides 61, but the micro gas generator housing 23 of the cylinder 11 and the cable guide 61 are larger than the distance h between the cylinder side wire locking portion 17 of the cylinder 11 and the cable guide 61. Is arranged so that the distance H between the
  • the cylinder 11 is provided in a suspended state by the first cable 13A and the second cable 13B between the left and right cable guides 61. Therefore, the cylinder 11 is supported by the wire cable 13.
  • the cylinder 11 of the belt pretensioner 10B and the cylinder 11 of the seat moving pretensioner 10A are arranged side by side (FIGS. 16 and 17).
  • the cylinder 11 of the seat moving pretensioner 10A is positioned in front of the cylinder 11 of the belt pretensioner 10B. That is, when the seat bottom 3 moves rearward, the cylinder 11 of the seat moving pretensioner 10A moves rearward together with the seat bottom 3, but the cylinder 11 of the belt pretensioner 10B is located at substantially the same location.
  • the cylinder 11 of the pretensioner 10A is positioned on the front side of the cylinder 11 of the belt pretensioner 10B, and a sufficient pulling amount of the wire cable 13 pulled by each cylinder 11 is secured to stabilize the operation.
  • the cylinder 11 of the seat moving pretensioner 10A is positioned above the cylinder 11 of the belt pretensioner 10B, and the cylinder 11 of the seat moving pretensioner 10A moves rearward together with the seat bottom 3 to the belt pretensioner 10B.
  • the cylinder 11 is positioned so as not to interfere with the cylinder 11 (FIG. 17).
  • the cable guide 61 of the seat moving pretensioner 10A has the wire cable 13 of the seat moving pretensioner 10A positioned inside the wire cable 13 guided by the cable guide 61 of the belt pretensioner 10B. It arranges and arranges so that it may guide (FIG. 16).
  • the seat belt 40 is a tongue plate provided in the middle part of the seat belt 40, and 66 is an inner buckle.
  • the seat belt 40 has a shoulder belt 67 from the vicinity of the shoulder of the seated person on one end side of the belt retractor 47 to the tongue plate 65.
  • the lap belt 68 Up to the plate 41 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.
  • 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. However, the tongue plate 65 is configured not to move with respect to the seat belt 40 when the normal seat belt 40 is pulled out. Yes.
  • the pretensioner 10 such as the seat pretensioner 10A and the belt pretensioner 10B generates a large amount of gas by the micro gas generator 28 when the impact detector 34 detects an impact, and the cylinder on one side of the piston 12 is used. 11, the piston 12 is moved instantaneously 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 is pulled by the movement of the first cable 13A and the second cable 13B of the wire cable 13 locked to the locking portion T in the opposite directions of the piston 12 and the cylinder 11, respectively,
  • the movable member K to be restrained is operated to restrain the seated person.
  • the wire cable 13 since the end of the wire cable 13 is locked to the piston rod 21 and the piston rod 21 is movably inserted into the cylinder 11, the wire cable 13 directly gasses in the cylinder 11 (gas ejection chamber 20). The strength of the wire cable 13 is prevented from being lowered without being exposed to the gas of the generator 16.
  • piston rod 21 is inserted into the cylindrical member 22, and the outer surface of the piston rod 21 is smoother than the wire cable 13, so that the adhesion with the O-ring 38 of the cylindrical member 22 is improved, and the gas generated from the gas generator 16 is increased. Leakage from the cylinder 11 is prevented as much as possible.
  • the O-ring 38 is provided on the inner peripheral surface of the cylindrical member 22, the reliability and durability of the sealing performance are improved as compared with the structure in which the O-ring 38 is exposed in the gas ejection chamber 20.
  • the cylindrical member 22 that supports and guides the piston rod 21 is provided inside the cylinder 11 on the opposite side of the cylinder side wire locking portion 17 of the cylinder 11 in parallel with the axial direction of the cylinder 11. It is not necessary to lengthen the overall length, and the cylinder 11 is downsized.
  • the cylindrical member 22 protrudes into the cylinder 11 with a predetermined length, the length of the piston rod 21 is formed shorter than the length of the cylinder 11. Therefore, even if the piston rod 21 moves together with the piston 12, the cylinder member 22 surrounds the outer periphery of the piston rod 21, thereby preventing gas leakage from the cylinder 11.
  • the length of the cylindrical member 22 is increased, the moving amount of the piston 12 in the cylinder 11 is shortened. Therefore, the length of the cylindrical member 22 is made as much as possible within the range permitted by the moving amount of the piston 12 in the cylinder 11. Since the length of the piston rod 21 is shortened by the length of the cylindrical member 22, the length of the piston rod 21 exposed to the outside from the cylinder 11 is shortened.
  • the piston rod 21 which is not flexible as compared with the wire cable 13 is prevented from interfering with other components as much as possible.
  • the length of the piston rod 21 is configured to be shorter than the distance (the pulling length of the wire cable 13) that the piston 12 moves, the length of the piston rod 21 exposed from the cylinder 11 to the outside is shortened. Thus, the piston rod 21 is prevented from interfering with other components.
  • the piston rod 21 (piston 12). ) Moves farthest from the micro gas generator housing 23, the cable caulking portion 25 of the piston rod 21 remains in the cylindrical member 22, and the gas generated from the gas generator 16 by the O-ring 38 of the cylindrical member 22 is retained in the cylinder 11. To prevent leakage.
  • the cylinder 11 is formed to be shorter than the left and right widths of the seat bottom 3 and the cable guides 61 are provided below the seat bottoms 3 on both the left and right sides of the cylinder 11.
  • the wire cable 13 is pulled and the pretensioner 10 is stably operated.
  • the cylinder 11 Since the cylinder 11 is suspended between the left and right cable guides 61 by the pair of the first cable 13A and the second cable 13B of the wire cable 13, the cylinder 11 is supported by the wire cable 13 and is specially provided. This eliminates the need for preparing a dedicated mounting member, and facilitates the mounting work 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.
  • 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.
  • rod-shaped attachment members 57 are provided on both front and rear side portions of the pair of left and right side members 55 of the seat bottom frame 51 of the seat bottom 3, and the attachment members 57 are attached long in the front and rear directions provided on the fixed frame 46. Since the seat bottom 3 is inserted in the hole 56 so as to be relatively movable, the seat bottom frame 51 moves rearward with respect to the fixed frame 46.
  • the seat bottom 3 more securely supports the seat occupant by the rearward movement of the seat bottom 3, and the restraining effect of the seat occupant on the vehicle seat 1 is improved.
  • 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 ends of the first cable 13A and the second cable 13B of the pair of left and right wire cables 13 are locked to a fixed frame 46 (locking portion T) fixed to the slide rail 5 side, and the first end of the wire cable 13 is locked.
  • the tip of one of the cable 13A and the second cable 13B is connected to the piston rod 21 connected to the piston 12 provided in the cylinder 11 of the seat pretensioner 10A, and either the first cable 13A or the second cable 13B. Since the other tip is connected to the cylinder 11 side, when the impact is detected by the impact detection device 34 provided at the desired position of the vehicle body, the seat pretensioner 10A pulls the wire cable 13 to seat the bottom frame 51. And the seat bottom 3 is moved backward.
  • 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 the cylinder 11 is movable only in the direction of the axis of the cylinder 11. Since it is installed, the reaction force of the piston 12 that instantaneously moves due to a large amount of gas from the gas generator 16 acts on the movable cylinder 11, and the piston 12 and the cylinder 11 move in the opposite directions.
  • the first cable 13A locked to the piston rod 21 attached to the piston 12 and the second cable 13B connected to the cylinder 11 are pulled at substantially the same amount to move the seat bottom frame 51 rearward. Therefore, the number of components of the seated person restraining mechanism can be reduced and provided at low cost.
  • the cylinder 11 of the seat pretensioner 10A is attached to the front lower surface of the seat bottom frame 51, and cable guides 61 are provided at the left and right intermediate portions of the seat bottom frame 51. Since each of the cables 13B is changed in position toward the rear side of the fixed frame 46 and is locked to the rear portion of the fixed frame 46 (locking portion T), the first cable 13A and the second cable 13B are mutually connected. This prevents the vehicle seat 1 from coming into contact with other components when moving in the direction of relative shortening of the seat, and makes it possible to ensure good and reliable. The restraining effect on the vehicle seat 1 is improved.
  • the seat pretensioner 10A is configured by disposing one cylinder 11 below the front lower surface of the seat bottom frame 51 of the seat bottom 3 so that the axial direction of the cylinder 11 is the left-right direction. Therefore, the seat occupant restraint mechanism can be installed without sacrificing the legability of the occupant seated on the vehicle seat 1 behind the vehicle seat 1, and on the other hand, the operation of the seat pretensioner 10A can be performed reliably and reliably. .
  • the cylinder 11 of the seat pretensioner 10A is suspended between the left and right belt cable guides 61 by the pair of the first cable 13A and the second cable 13B of the wire cable 13, and the cylinder 11 is connected to the wire cable. Since the cylinder 11 is supported by the wire 13, the cylinder 11 is supported by the wire cable 13, and it is not necessary to prepare a special mounting member.
  • the cylinder 11 of the seat pretensioner 10 ⁇ / b> A has a moving space for pulling the required amount of the wire cable 13 between the left and right cable guides 61, so that the cylinder 11 itself moves by the action of the gas generator 16. However, the cylinder 11 is prevented from coming into contact with the cable guide 61, and the operation is ensured.
  • the cylinder 11 is positioned between the left and right cable guides 61, but the micro gas generator housing 23 (housing member 23 ⁇ / b> A) of the cylinder 11 is larger than the distance h between the cylinder side wire locking portion 17 of the cylinder 11 and the cable guide 61. ) And the cable guide 61 are arranged so that the distance H is widened, so that the left and right cable guides 61 and the cylinder 11 (piston rod 21) are prevented from interfering with each other and the wire cable 13 is moved. It stabilizes and improves the certainty of operation
  • the movable member K is a seat belt tensioning device that tensions the entire tension of the seat belt 40
  • the locking portion T is an anchor plate 41 or an inner wrap anchor 42
  • a belt pretensioner 10B that tensions the seat belt 40 is provided.
  • the pretensioner 10 is used to further improve the restraining effect of the occupant on the vehicle seat 1.
  • the seat belt 40 is formed by the belt pretensioner 10 ⁇ / b> B to the left and right anchor plates 41 or inner wrap anchors 42.
  • the belt pretensioner 10 ⁇ / b> B is configured to pull both of them to increase the overall tension of the seat belt 40, and the belt pretensioner 10 ⁇ / b> B detects the impact by the impact detection device provided at the desired position of the vehicle body.
  • the wire cable 13 is pulled instantaneously with pressure, and the seat base
  • the door 40 is tensioned to restrain the occupant in the vehicle seat 1.
  • One of the first cable 13A and the second cable 13B of the wire cable 13 is connected to the piston rod 21 attached to the piston 12 provided in the cylinder 11 of the belt pretensioner 10B, and the first cable 13A and the second cable 13B are connected. Since either one of the cables 13B is connected to the end of the cylinder 11, the left and right anchor plates 41 and the inner wrap anchors 42 are pulled almost simultaneously by one cylinder 11 of the belt pretensioner 10B, and the occupant is moved to the vehicle. Restrain to sheet 1.
  • the cylinder 11 of the belt pretensioner 10B is positioned so that the axis of the cylinder 11 is parallel to the pulling direction of the wire cable 13 with respect to the vehicle seat 1 or the vehicle body, and the axis of the cylinder 11 Since the cylinder 11 is movably installed only in the cylinder 11, 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, so that the piston 12 and the cylinder 11 are opposite to each other. Moving.
  • 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 belt pretensioner 10 ⁇ / b> B is provided below the front side of the seat bottom frame 51, and cable guides 61 are provided on both left and right sides below the seat bottom frame 51, and the first cable 13 ⁇ / b> A and the second cable are connected to each cable guide 61. Since each of 13B is changed in the direction of the side of the fixed frame 46 and is positioned and locked to the anchor plate 41 and the inner wrap anchor 42 (locking portion T), respectively, the first cable 13A and the second cable 13B.
  • the vehicle seat 1 is prevented from coming into contact with other components during the movement in the relative shortening direction, and it is possible to achieve good and reliable, and the tension of the seat belt 40 can be quickly increased, so that the seated vehicle seat Improve the restraining effect to 1.
  • the cylinder 11 of the belt pretensioner 10B is formed to have a length shorter than the left and right width of the seat bottom 3, and the cable guide 61 is provided below the seat bottom 3 on both the left and right sides of the cylinder 11.
  • the pretensioner 10B can be configured in a small size, and the installation space can be reduced.
  • the cylinder 11 of the belt pretensioner 10B is also provided in a suspended state by a pair of first cable 13A and second cable 13B of the wire cable 13 between the left and right belt cable guides 61. Since it is configured to be supported by the cable 13, the cylinder 11 is supported by the wire cable 13, and it is not necessary to prepare a special mounting member, thereby facilitating the mounting operation of the cylinder 11.
  • both the seat moving pretensioner 10A and the belt pretensioner 10B are connected to the vehicle seat. It can be installed together.
  • the cylinder 11 of the seat movement pretensioner 10A is positioned above the cylinder 11 of the belt pretensioner 10B, when the cylinder 11 of the seat movement pretensioner 10A moves backward together with the seat bottom 3, It does not interfere with the cylinder 11 of the belt pretensioner 10B.
  • the cable guide 61 of the seat moving pretensioner 10A has the wire cable 13 of the seat moving pretensioner 10A positioned inside the wire cable 13 guided by the cable guide 61 of the belt pretensioner 10B. Since they are arranged and guided, the wire cables 13 pulled by both the seat moving pretensioner 10A and the belt pretensioner 10B do not interfere with each other, and the operation is ensured.
  • the wire cable 13 of the seat moving pretensioner 10 ⁇ / b> A in which the seat bottom 3 moves inside the fixed frame 46 is positioned inside the fixed frame 46.
  • the wire cable 13 of the belt pretensioner 10B that pulls the anchor plate 41 and the inner wrap anchor 42 positioned outside the left and right fixed frames 46 is positioned outside the fixed frame 46 to stabilize and operate. Space can be used effectively, and the whole structure is rational.
  • the cylinder 11 of the belt pretensioner 10B has a moving space for pulling a required amount of the wire cable 13 between the left and right cable guides 61, the cylinder 11 itself is operated by the action of the gas generator 16. Even if it moves, the contact with the cable guide 61 is prevented and the operation is ensured.
  • the cylinder 11 of the belt pretensioner 10B is located between the left and right cable guides 61, but the micro gas generator of the cylinder 11 is larger than the distance h between the cylinder side wire locking portion 17 of the cylinder 11 and the cable guide 61. Since the arrangement H is made so that the distance H between the housing 23 (housing member 23A) and the cable guide 61 is wide, the left and right cable guides 61 and the cylinder 11 (piston rod 21) are prevented from interfering with each other, The movement of the wire cable 13 is stabilized and the certainty of the operation of the pretensioner 10 is improved.

Landscapes

  • 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 (13A) is connected, a piston (12) moving in the cylinder and to which a second cable (13B) is connected, and a gas generator (28) for supplying gas into expansion chamber (20) in the cylinder (11) to move piston in a first direction and move the cylinder in a second direction opposite to the first direction. The piston is connected to the second cable via a piston rod (21). A tube member (22) into which the piston rod is movably inserted is provided in the expansion chamber.

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、ワイヤーケーブルはシリンダ内の膨張チャンバー内を通過してピストンに連結されている。このため、膨張チャンバーの気密性を保持するのが難しかった。つまり、ワイヤーケーブルは、シリンダの端部を密偵する気密キャップを貫通するため、ワイヤーケーブルと気密キャップとの間の気密性を保持しながら、ワイヤーケーブルの気密キャップに対する円滑な移動を確保しなければならなかった。 In the pretensioner of the previous invention, the wire cable passes through the expansion chamber in the cylinder and is connected to the piston. For this reason, it was difficult to maintain the airtightness of the expansion chamber. In other words, since the wire cable penetrates the hermetic cap that scouts the end of the cylinder, it is necessary to ensure smooth movement of the wire cable relative to the hermetic cap while maintaining the hermeticity between the wire cable and the hermetic cap. did not become.
　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.
車両シートの斜視図。The perspective view of a vehicle seat. 本発明によるプリテンショナーの断面図。1 is a cross-sectional view of a pretensioner according to the present invention. 第２実施例のプリテンショナーの断面図。Sectional drawing of the pretensioner of 2nd Example. 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した概略図。Schematic which showed the movement state of the cylinder and piston of a pretensioner. 第３実施例のプリテンショナーの断面図。Sectional drawing of the pretensioner of 3rd Example. 第３実施例のプリテンショナーの断面図。Sectional drawing of the pretensioner of 3rd Example. 第３実施例のピストンの斜視図。The perspective view of the piston of 3rd Example. プリテンショナーとケーブルガイドの配置を示す概略図。Schematic which shows arrangement | positioning of a pretensioner and a cable guide. シートボトムフレームと固定フレームの斜視図。The perspective view of a seat bottom frame and a fixed 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. 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 belts. ベルト用プリテンショナーのケーブルガイドの斜視図。The perspective view of the cable guide of the pretensioner for belts. シート用プリテンショナーおよびベルト用プリテンショナーのシリンダとケーブルガイドの概略平面図。FIG. 3 is a schematic plan view of a cylinder and a cable guide of a seat pretensioner and a belt pretensioner. シート用プリテンショナーおよびベルト用プリテンショナーのシリンダの概略側面図。The schematic side view of the cylinder of the pretensioner for sheets and the pretensioner for belts.
　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. 1 is a vehicle seat, 2 is a seat back of the vehicle seat 1, 3 is a seat bottom, 4 is a headrest provided on the upper portion of the seat back 2, and 5 is a vehicle seat 1 on the vehicle body. It is a slide rail that is moved relative to it.
　車両シート１には、ガス発生剤に着火して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側にワイヤケーブル１３の一対の第１ケーブル１３Ａと第２ケーブル１３Ｂの何れか一方の一端を接続する。前記第１ケーブル１３Ａと第２ケーブル１３Ｂの何れか他方の一端はシリンダ１１のシリンダ側ワイヤ係止部１７に接続する。第１ケーブル１３Ａと第２ケーブル１３Ｂの夫々の他端は、係止部Ｔに夫々接続する。 The vehicle seat 1 is provided with a pretensioner 10 that ignites the gas generating agent to generate a large amount of gas 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 one of the pair of first cable 13A and second cable 13B of the wire cable 13 is connected to the piston 12 side. One end of the other of the first cable 13 </ b> A and the second cable 13 </ b> B is connected to the cylinder-side wire locking portion 17 of the cylinder 11. The other ends of the first cable 13A and the second cable 13B are connected to the locking portion T, respectively.
　前記シリンダ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。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の構成は任意であり、図２～図４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。 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 arbitrary, and the gas generator 16 is provided outside the cylinder 11 in the embodiments of FIGS.
　ガスジェネレータ１６はマイクロガスジェネレータ（ＭＧＧ）２８を有し、図示は省略するが、マイクロガスジェネレータ２８の内部にガスを発生させる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、高圧ガスのガス圧によりピストン１２を移動させるように構成する。 The gas generator 16 has a micro gas generator (MGG) 28, which is not shown, but contains a gas generating agent that generates gas inside the micro gas generator 28, and generates a high-pressure gas with the gas generating agent. The piston 12 is moved by the gas pressure of the high pressure gas.
　ガスジェネレータ１６のマイクロガスジェネレータ２８は前記シリンダ側ワイヤ係止部１７の反対側に設けたシリンダ１１の端部の外面に設ける。マイクロガスジェネレータ２８はシリンダ１１内のガス噴出室（膨張チャンバー）２０に臨ませる。ガス噴出室２０には前記ピストン１２を臨ませ、ピストン１２にはピストンロッド２１を取付ける。ピストンロッド２１にはワイヤケーブル１３を接続する。ピストン１２にはピストンロッド２１を介してワイヤケーブル１３を接続する。 The micro gas generator 28 of the gas generator 16 is provided on the outer surface of the end portion of the cylinder 11 provided on the opposite side of the cylinder side wire locking portion 17. The micro gas generator 28 faces the gas ejection chamber (expansion chamber) 20 in the cylinder 11. The piston 12 faces the gas ejection chamber 20, and a piston rod 21 is attached to the piston 12. A wire cable 13 is connected to the piston rod 21. A wire cable 13 is connected to the piston 12 via a piston rod 21.
　ピストンロッド２１はシリンダ１１に移動自在に取付ける。実施例ではピストンロッド２１はシリンダ１１の筒部材（シールエクステンション部）２２に移動自在に挿通する。筒部材２２は、その基部をシリンダ１１に取付け、筒部材２２の先端はガス噴出室２０内に開口させる。筒部材２２は、図３では筒部材２２はマイクロガスジェネレータハウジング２３に一体状に形成し、筒部材２２の先端はシリンダ１１内の所定位置に位置させているが、シリンダ１１に設ければよく、その構成は任意であり、マイクロガスジェネレータハウジング２３と別体でも良い。 The piston rod 21 is movably attached to the cylinder 11. In the embodiment, the piston rod 21 is movably inserted into the cylinder member (seal extension portion) 22 of the cylinder 11. The cylindrical member 22 has its base attached to the cylinder 11, and the distal end of the cylindrical member 22 is opened into the gas ejection chamber 20. In FIG. 3, the cylindrical member 22 is formed integrally with the micro gas generator housing 23 and the tip of the cylindrical member 22 is positioned at a predetermined position in the cylinder 11. The configuration is arbitrary, and may be separate from the micro gas generator housing 23.
　ピストンロッド２１の一端には螺子溝等を設けたピストン取付部２４を設け、ピストン取付部２４にピストン１２を密着状態に取付ける。ピストンロッド２１の他端にはケーブルカシメ部２５を設け、ケーブルカシメ部２５にワイヤケーブル１３の端部を係止する。前記ピストン１２は、シリンダ１１の内周に摺接する大径部２６を有する。大径部２６は傘状に形成し、大径部２６のシリンダ側ワイヤ係止部１７側を閉塞し、マイクロガスジェネレータハウジング２３側を開口した筒形状に形成する。 A piston mounting portion 24 provided with a screw groove or the like is provided at one end of the piston rod 21, and the piston 12 is attached to the piston mounting portion 24 in a close contact state. A cable crimping portion 25 is provided at the other end of the piston rod 21, and the end of the wire cable 13 is locked to the cable crimping portion 25. The piston 12 has a large diameter portion 26 that is in sliding contact with the inner periphery of the cylinder 11. The large-diameter portion 26 is formed in an umbrella shape, is formed in a cylindrical shape that closes the cylinder-side wire locking portion 17 side of the large-diameter portion 26 and opens the micro gas generator housing 23 side.
　前記筒部材２２の先端にはオーリング３８を設け、オーリング３８はピストンロッド２１の外面に密着させる。即ち、シリンダ１１のピストン１２の移動を伝達するワイヤケーブル１３を直接ピストン１２に接続せずに、ピストンロッド２１を介してピストン１２に接続し、このピストンロッド２１の外面を平滑に形成し、ピストンロッド２１と筒部材２２のオーリング３８との密着性を向上させ、ガスジェネレータ１６から発生したガスがシリンダ１１から漏れるのを極力防止する。また、オーリング３８は筒部材２２の内周面に設け、オーリング３８がガス噴出室２０内に露出して、ガスに晒されるのを防止する。 An O-ring 38 is provided at the tip of the cylindrical member 22, and the O-ring 38 is brought into close contact with the outer surface of the piston rod 21. That is, the wire cable 13 for transmitting the movement of the piston 12 of the cylinder 11 is not directly connected to the piston 12, but is connected to the piston 12 via the piston rod 21, and the outer surface of the piston rod 21 is formed smoothly. The adhesion between the rod 21 and the O-ring 38 of the cylindrical member 22 is improved, and the gas generated from the gas generator 16 is prevented from leaking from the cylinder 11 as much as possible. The O-ring 38 is provided on the inner peripheral surface of the cylindrical member 22 to prevent the O-ring 38 from being exposed to the gas by being exposed in the gas ejection chamber 20.
　前記筒部材２２は、前記シリンダ１１のシリンダ側ワイヤ係止部１７の反対側のシリンダ１１の内側に、シリンダ１１の軸心方向と平行に設ける。前記筒部材２２は所定長さを有して形成し、前記ピストンロッド２１の長さをシリンダ１１の長さより短く形成する。したがって、ピストン１２と共にピストンロッド２１が移動しても、ピストンロッド２１の外周を筒部材２２が包囲しており、シリンダ１１からのガス漏れを防止する。 The cylindrical member 22 is provided inside the cylinder 11 on the opposite side of the cylinder side wire locking portion 17 of the cylinder 11 in parallel with the axial direction of the cylinder 11. The cylindrical member 22 is formed to have a predetermined length, and the length of the piston rod 21 is shorter than the length of the cylinder 11. Therefore, even if the piston rod 21 moves together with the piston 12, the cylinder member 22 surrounds the outer periphery of the piston rod 21, thereby preventing gas leakage from the cylinder 11.
　また、筒部材２２の長さを長くすると、シリンダ１１内のピストン１２の移動量が短くなるので、シリンダ１１内でのピストン１２の移動量による制約の許す範囲で筒部材２２の長さを可及的に長くするように構成する。筒部材２２を長くした分ピストンロッド２１の長さを短くして、シリンダ１１から外部に露出するピストンロッド２１の長さを短くするように構成する。 Further, when the length of the cylindrical member 22 is increased, the moving amount of the piston 12 in the cylinder 11 is shortened. Therefore, the length of the cylindrical member 22 can be set within a range that is restricted by the moving amount of the piston 12 in the cylinder 11. It is configured to be as long as possible. The length of the piston rod 21 is shortened by the length of the cylindrical member 22, and the length of the piston rod 21 exposed to the outside from the cylinder 11 is shortened.
　また、ピストン１２が移動する距離（ワイヤケーブル１３の牽引長さ）に対して前記ピストンロッド２１の長さは短くなるように構成する。これによっても、シリンダ１１から外部に露出するピストンロッド２１の長さを短くする。したがって、筒部材２２とピストンロッド２１を合わせた長さが、ピストン１２が移動する距離（ワイヤケーブル１３の牽引長さ）より長くなるように構成して、ピストンロッド２１が最もマイクロガスジェネレータハウジング２３から遠くへ移動したときでも、ピストンロッド２１のケーブルカシメ部２５が筒部材２２内に留まらせて、筒部材２２のオーリング３８によるガスジェネレータ１６から発生したガスがシリンダ１１から漏れるのを防止する。 Further, the length of the piston rod 21 is configured to be shorter than the distance (the pulling length of the wire cable 13) that the piston 12 moves. This also shortens the length of the piston rod 21 exposed from the cylinder 11 to the outside. Accordingly, the combined length of the cylindrical member 22 and the piston rod 21 is configured to be longer than the distance that the piston 12 moves (the pulling length of the wire cable 13), and the piston rod 21 is the most micro gas generator housing 23. The cable caulking portion 25 of the piston rod 21 remains in the cylindrical member 22 even when the piston rod 21 moves far from the cylinder, and the gas generated from the gas generator 16 by the O-ring 38 of the cylindrical member 22 is prevented from leaking from the cylinder 11. .
　このように、ピストンロッド２１の長さを短くした場合、ピストン１２が最もマイクロガスジェネレータハウジング２３から遠くへ移動したとき、ピストンロッド２１の端部がシリンダ１１の外部に露出せずに、ワイヤーケーブル１３の端部が筒部材２２内に入ってもよく、この状態でも、ピストンロッド２１とオーリング３８とによりガスジェネレータ１６からのガスはシリンダ１１から漏れず、ワイヤーケーブル１３がガスに晒されるのも防止する。したがって、ピストンロッド２１はワイヤーケーブル１３と同径かより大径に形成し、ワイヤーケーブル１３の端部が筒部材２２内に進入可能に構成する。 Thus, when the length of the piston rod 21 is shortened, when the piston 12 moves farthest from the micro gas generator housing 23, the end of the piston rod 21 is not exposed to the outside of the cylinder 11, and the wire cable In this state, the gas from the gas generator 16 does not leak from the cylinder 11 and the wire cable 13 is exposed to the gas. Also prevent. Therefore, the piston rod 21 is formed to have the same diameter or larger diameter than the wire cable 13 so that the end of the wire cable 13 can enter the cylindrical member 22.
　前記ガスジェネレータ１６の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に接続し、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は多量のガスを発生させ、この多量のガスをピストン１２の一方側のシリンダ１１内のガス噴出室２０に充満させ、このときのガス圧により瞬時にピストン１２を移動させてピストンロッド２１を介してワイヤケーブル１３を牽引してプリテンショナー１０を作動させる。 The coupler 32 is connected to the micro gas generator 28 of the gas generator 16. The harness 33 connected to the coupler 32 is connected to an impact detection device 34 provided at a desired position of the vehicle body. When the impact detection device 34 detects an impact, the micro gas generator 28 generates a large amount of gas, and this large amount of gas is generated. The gas ejection chamber 20 in the cylinder 11 on one side of the piston 12 is filled, the piston 12 is instantaneously moved by the gas pressure at this time, and the wire cable 13 is pulled through the piston rod 21 to operate the pretensioner 10. Let
　ピストン１２の大径部２６にはオーリング３５を設ける。また、ピストン１２の大径部２６には大径部２６よりシリンダ側ワイヤ係止部１７側に至るに従い次第に小径となる傾斜面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. Further, the large diameter portion 26 of the piston 12 is formed with an inclined surface 37 that gradually becomes smaller in diameter from the large diameter portion 26 toward the cylinder side wire locking portion 17, and between the inclined surface 37 and the inner peripheral surface of the cylinder 11. A steel ball 36 for stopper that stops the return movement of the piston 12 is built in the space between them.
　図５～図７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の一方側に前記ピストンロッド２１のピストン取付部２４を固定するロッド固定部２７を形成する。 5 to 7, the gas generator 16 is provided in the cylinder 11. Specifically, the gas generator 16 is provided on the piston 12. The piston 12 forms a rod fixing portion 27 that fixes the piston mounting portion 24 of the piston rod 21 on one side of the large diameter portion 26 that is in sliding contact with the inner periphery of the cylinder 11.
　大径部２６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５，図６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）。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。 The large-diameter portion 26 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 (in FIG. 5 and FIG. 6, it is easy to understand). For this reason, the micro gas generator 28 is displayed with fine dots, but the configuration is not limited thereby). 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.
　前記ピストン１２は、その大径部２６の一方側にガス噴出口２９を形成し、ガス噴出口２９のガス噴出方向側のシリンダ１１をガス噴出室２０に形成する。ガス噴出室２０内には筒部材２２を設け、筒部材２２はガス噴出室２０側のシリンダ１１の端部に設けたハウジング部材２３Ａに設ける。 The piston 12 forms a gas outlet 29 on one side of the large-diameter portion 26, and forms a cylinder 11 on the gas ejection direction side of the gas outlet 29 in the gas ejection chamber 20. A cylinder member 22 is provided in the gas ejection chamber 20, and the cylinder member 22 is provided in a housing member 23 </ b> A provided at the end of the cylinder 11 on the gas ejection chamber 20 side.
　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。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に接続し、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からピストン１２の一方側のシリンダ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。 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. When the impact detection device 34 detects an impact, the micro gas generator 28 is operated to generate a large amount of gas. The gas is filled into the cylinder 11 on one side of the piston 12 from the gas outlet 29, and the piston 12 is instantaneously moved by the gas pressure at this time to pull the wire cable 13 to operate the pretensioner 10.
　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、かつ、シリンダ側ワイヤ係止部１７側に至るに従い大径になる傾斜の傾斜面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. On the outer periphery of the cap 30 to be screwed into the large diameter portion 26 of the piston 12, an inclined surface 37 is formed which has a smaller diameter than the large diameter portion 26 and increases in diameter toward the cylinder side wire locking portion 17 side. A stopper steel ball 36 for stopping the return movement of the piston 12 is built in the space between the inclined surface 37 and the inner peripheral surface of the cylinder 11.
　プリテンショナー１０の前記シリンダ１１と前記係止部Ｔの中間位置には、前記シリンダ１１およびピストン１２によるワイヤケーブル１３の左右方向の移動方向を、前後方向に変換するケーブルガイド６１を設ける（図８）。 A cable guide 61 is provided at an intermediate position between the cylinder 11 and the locking portion T of the pretensioner 10 to convert the movement direction of the wire cable 13 by the cylinder 11 and the piston 12 in the front-rear direction (FIG. 8). ).
　即ち、前記シリンダ１１と前記係止部Ｔは、シリンダ１１の軸心方向が車両シート１の左右方向となるように、前記係止部Ｔは前記ワイヤケーブル１３が前記シリンダ１１の軸心方向に対して交差方向に牽引されるように、夫々配置し、前記シリンダ１１と前記係止部Ｔの中間位置には、前記シリンダ１１およびピストン１２によるワイヤケーブル１３の左右方向の移動方向を前後方向に変換する前記ケーブルガイド６１を設ける。 That is, the cylinder 11 and the locking portion T are arranged so that the wire cable 13 extends in the axial direction of the cylinder 11 so that the axial direction of the cylinder 11 is the left-right direction of the vehicle seat 1. They are respectively arranged so as to be pulled in the crossing direction, and in the middle position between the cylinder 11 and the locking portion T, the movement direction of the wire cable 13 in the left-right direction by the cylinder 11 and the piston 12 is the front-rear direction. The cable guide 61 to be converted is provided.
　左右のケーブルガイド６１の間には左右のケーブルガイド６１の間隔が狭くなるのを防止する補強フレーム９０を設ける。ケーブルガイド６１および補強フレーム９０は任意の固定部に固定すればよく、取付箇所は問わない。即ち、例えば、左右のケーブルガイド６１を任意の固定部に固定し、この左右のケーブルガイド６１に補強フレーム９０の左右両側部分を固定すればよく、また、補強フレーム９０を任意の固定部に固定し、この補強フレーム９０の左右両側部分に夫々ケーブルガイド６１を固定しても良い。 A reinforcing frame 90 is provided between the left and right cable guides 61 to prevent the distance between the left and right cable guides 61 from becoming narrow. What is necessary is just to fix the cable guide 61 and the reinforcement frame 90 to arbitrary fixing | fixed parts, and an attachment location is not ask | required. That is, for example, the left and right cable guides 61 may be fixed to arbitrary fixing portions, and the left and right side portions of the reinforcing frame 90 may be fixed to the left and right cable guides 61, and the reinforcing frame 90 may be fixed to arbitrary fixing portions. The cable guides 61 may be fixed to the left and right side portions of the reinforcing frame 90, respectively.
　図９～図１２は、前記可動部材Ｋをシートボトム３の移動装置とし、係止部Ｔを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。 9 to 12, the movable member K is a moving device for the seat bottom 3, the locking portion T is a fixed frame 46 to be described later, and the pretensioner 10 is used as the seat pretensioner 10A 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 from the gas generating agent of the gas generator 16 and instantaneously pulls the wire cable 13 by this large amount of gas. Then, the seat back 2 is left as it is, independently of the seat belt 40, and only the seat bottom 3 is moved backward in the event of a collision with the seat back 2 to improve the restraint of the seated person.
　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するように取付ける。 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 move backward within a predetermined range.
　したがって、固定フレーム４６を係止部Ｔとし、前記固定フレーム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、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（ピストンロッド２１）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の端部に接続する。 Therefore, the fixed frame 46 is used as the locking portion T, and the first cable 13A and the second cable 13B of the pair of left and right wire cables 13 are locked to the fixed frame 46, respectively. One of the ends of the cable 13A and the second cable 13B is connected to the piston 12 (piston rod 21) provided in the cylinder 11 of the seat pretensioner 10A, and either the first cable 13A or the second cable 13B is connected. The other is connected to the end of the cylinder 11.
　シート用プリテンショナー１０Ａは、一つのシリンダ１１とピストン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の夫々を牽引して、略同時にシートボトムフレーム５１を牽引し、シートボトム３を後方移動させる。 The seat pretensioner 10 </ b> A pulls the first cable 13 </ b> A and the second cable 13 </ b> B of the wire cable 13 with one cylinder 11 and the piston 12, pulls the seat bottom frame 51 substantially at the same time, and moves the seat bottom 3 backward. Move.
　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、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, and in the axis direction of the cylinder 11. The seat bottom 3 is configured to be movably installed, and the seat bottom 3 is moved backward by one cylinder 11.
　この場合、左右の固定フレーム４６（係止部Ｔ）とシート用プリテンショナー１０Ａのシリンダ１１およびピストン１２（ピストンロッド２１）に夫々係止したワイヤーケーブル１３の第１ケーブル１３Ａと第２ケーブル１３Ｂの中間位置には、ピストン１２とシリンダ１１とが左右方向に牽引した第１ケーブル１３Ａと第２ケーブル１３Ｂの移動方向を、シートボトム３が後方移動するように、前後方向に変換する前記ケーブルガイド６１を設ける（図１０，図１１）。 In this case, the first cable 13A and the second cable 13B of the wire cable 13 locked to the left and right fixed frames 46 (locking portion T) and the cylinder 11 and piston 12 (piston rod 21) of the seat pretensioner 10A, respectively. At the intermediate position, the cable guide 61 converts the moving direction of the first cable 13A and the second cable 13B pulled by the piston 12 and the cylinder 11 in the left-right direction into the front-rear direction so that the seat bottom 3 moves backward. (FIGS. 10 and 11).
　シート用プリテンショナー１０Ａのシリンダ１１は所定長さに形成し、左右のケーブルガイド６１間にワイヤケーブル１３を必要量牽引できるための移動スペースを持って、配置する。即ち、シリンダ１１の移動量が左右のケーブルガイド６１間に収まるように、シリンダ１１の直径および長さとワイヤケーブル１３の牽引量とを考慮して設定する。 The cylinder 11 of the seat pretensioner 10A is formed to have a predetermined length, and is arranged with a moving space for pulling a required amount of the wire cable 13 between the left and right cable guides 61. That is, it is set in consideration of the diameter and length of the cylinder 11 and the pulling amount of the wire cable 13 so that the movement amount of the cylinder 11 is accommodated between the left and right cable guides 61.
　また、シリンダ１１は、左右のケーブルガイド６１間に位置するが、シリンダ１１のシリンダ側ワイヤ係止部１７とケーブルガイド６１との間隔ｈよりも、シリンダ１１のマイクロガスジェネレータハウジング２３とケーブルガイド６１との間隔Ｈが広くなるように、配置構成する。 The cylinder 11 is positioned between the left and right cable guides 61, but the micro gas generator housing 23 of the cylinder 11 and the cable guide 61 are larger than the distance h between the cylinder side wire locking portion 17 of the cylinder 11 and the cable guide 61. Is arranged so that the distance H between the
　具体的には、シリンダ１１のシリンダ側ワイヤ係止部１７とケーブルガイド６１との間隔ｈよりも、シリンダ１１のピストンロッド２１のケーブルカシメ部２５とケーブルガイド６１との間隔Ｈを広くするように配置構成する。それゆえ、予め、前記ピストンロッド２１のケーブルカシメ部２５とケーブルガイド６１との間に所定の間隔を設け、シリンダ１１のピストンロッド２１のケーブルカシメ部２５とケーブルガイド６１の間にワイヤケーブル１３を位置させ、ワイヤケーブル１３の牽引方向をケーブルガイド６１により円滑に変更する。 Specifically, the distance H between the cable caulking portion 25 of the piston rod 21 of the cylinder 11 and the cable guide 61 is made wider than the distance h between the cylinder side wire locking portion 17 of the cylinder 11 and the cable guide 61. Arrange the configuration. Therefore, a predetermined interval is previously provided between the cable crimping portion 25 of the piston rod 21 and the cable guide 61, and the wire cable 13 is connected between the cable crimping portion 25 of the piston rod 21 of the cylinder 11 and the cable guide 61. Then, the pulling direction of the wire cable 13 is smoothly changed by the cable guide 61.
　したがって、左右のケーブルガイド６１とシリンダ１１（ピストンロッド２１）とが干渉するのを防止して、ワイヤケーブル１３の移動を安定させて、シート用プリテンショナー１０Ａの作動の確実性を向上させる。 Therefore, interference between the left and right cable guides 61 and the cylinder 11 (piston rod 21) is prevented, the movement of the wire cable 13 is stabilized, and the reliability of the operation of the seat pretensioner 10A is improved.
　また、シリンダ１１は、左右のケーブルガイド６１間の第１ケーブル１３Ａと第２ケーブル１３Ｂにより宙吊り状態に設ける。したがって、シリンダ１１はワイヤケーブル１３により支持される。 Further, the cylinder 11 is provided in a suspended state by the first cable 13A and the second cable 13B between the left and right cable guides 61. Therefore, the cylinder 11 is supported by the wire cable 13.
　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、図１、図９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の前後両側部部分に棒状形状の取付部材５７を設け、取付部材５７を固定フレーム４６に設けた取付孔５６に夫々係合させる。 Although the specific movement configuration of the seat bottom 3 is arbitrary, in an example shown in FIGS. 1 and 9, rod-like shapes 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. The attachment member 57 is provided, and the attachment member 57 is engaged with the attachment holes 56 provided in the fixed frame 46, respectively.
　また、図１０～図１２の実施例では取付孔５６をシートボトムフレーム５１の左右一対の側部部材５５の後側部分に取付孔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、シートボトムフレーム５１の前側部分は、図１０～図１２のように、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ている。そのため、衝突時のシートボトム３の後退をさせる場合、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。 10 to 12, the mounting hole 56 is formed in the rear part of the pair of left and right side members 55 of the seat bottom frame 51, and the mounting hole 56 is a rod-shaped member provided in the fixed frame 46. 10 to 12, the front portion of the seat bottom frame 51 is rotated around the upper portion of the arm 58 by the shaft 59 without depending on the mounting hole 56 and the mounting member 57, as shown in FIGS. The lower part of the arm 58 is rotatably attached to the fixed frame 46 by a shaft 60. Therefore, when the seat bottom 3 is retracted at the time of a collision, it can be retracted while raising the front end of the seat bottom 3, and it is possible to further improve the restraining effect of the seated person by the seat belt 40, which is preferable. .
　４７はベルトリトラクター、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。 47 is a belt retractor, 62 is a cushion 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、シートベルト４０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 anchor plate 41 and the inner wrap anchor 42 of the seat belt 40 are the locking portions T, and the belt pretensioner that tensions the seat belt 40. 10B is constituted by the pretensioner 10 to further improve 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、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の先端はベルト用プリテンショナー１０Ｂのシリンダ１１とピストン１２に取付ける。 Specifically, the base portions (locking portions T) of the left and right anchor plates 41 and the inner wrap anchor 42 are locked with the base portions of the first cable 13A and the second cable 13B of the pair of left and right wire cables 13, respectively. The ends of the first cable 13A and the second cable 13B of the wire cable 46 are attached to the cylinder 11 and the piston 12 of the belt pretensioner 10B.
　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、ガス発生剤により多量のガスを発生させて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 pretensioner 10B generates a large amount of gas by the gas generating agent and pulls the wire cable 13 instantaneously by the gas pressure, thereby causing the seat belt 40 to Is configured to restrain the occupant 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の夫々を牽引して、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。 Similar to the seat pretensioner 10A, the belt pretensioner 10B pulls the first cable 13A and the second cable 13B of the wire cable 13 by one cylinder 11 (piston 12), and at the same time, the left and right anchor plates. 41 and the inner wrap anchor 42 are pulled, and an occupant is restrained 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、該シリンダ１１の軸芯が車両シート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。 Similarly to the seat pretensioner 10A, the cylinder 11 of the belt pretensioner 10B is positioned so that the axis of the cylinder 11 is parallel to the pulling direction of the wire cable 13 with respect 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.
　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３）。 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. 3).
　それゆえ、一つのシリンダ１１（ピストン１２）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とは、略同時に同量牽引されて、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, even with one cylinder 11 (piston 12), the first cable 13A connected to the piston 12 and the second cable 13B connected to the cylinder 11 are pulled by the same amount at the same time, and the wire cable 13 is occupant. Is restrained to the vehicle seat 1.
　ベルト用プリテンショナー１０Ｂの前記シリンダ１１および前記ピストン１２と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（係止部Ｔ）との間の前記ワイヤケーブル１３の一対の第１ケーブル１３Ａと第２ケーブル１３Ｂの夫々の中間部には夫々前記ケーブルガイド（ベルト用ケーブルガイド）６１を設ける。 A pair of first cable 13A and second cable 13B of the wire cable 13 between the cylinder 11 and the piston 12 of the belt pretensioner 10B and the left and right anchor plates 41 and inner wrap anchors 42 (locking portions T). The cable guides (belt cable guides) 61 are provided in the intermediate portions of the belts.
　ベルト用ケーブルガイド６１は前記ケーブルガイド６１と略同一形状に形成し、任意の固定部に固定する。即ち、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は、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に取り付ける場合、左右のベルト用ケーブルガイド６１および補強フレーム９０は固定フレーム４６またはアッパーレール３５に固定して取付ける（図１５）。 The belt cable guide 61 is formed in substantially the same shape as the cable guide 61 and is fixed to an arbitrary fixing portion. That is, when the left and right anchor plates 41 and the inner wrap anchors 42 of the seat belt 40 are attached to a pair of left and right fixed frames 46 provided on the left and right upper rails 35 of the slide rail 5, the left and right belt cable guides 61 and the reinforcement frame 90 is fixedly attached to the fixed frame 46 or the upper rail 35 (FIG. 15).
　なお、図示は省略するが、車両シート１を車体に対して上下させてシート１の高さを調節する高さ調節機構を設けた場合には、アッパーレール３５に対して前記固定フレーム４６が上下することとなるので、固定フレーム４６ではなくアッパーレール３５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を取付け、シートベルト４０に掛かる荷重をスライドレール５により支持するように、ベルト用ケーブルガイド６１および補強フレーム９０もアッパーレール３５側に取り付けることになる。 Although not shown, when the height adjustment mechanism for adjusting the height of the seat 1 by moving the vehicle seat 1 up and down with respect to the vehicle body is provided, the fixed frame 46 is moved up and down with respect to the upper rail 35. Therefore, the left and right anchor plates 41 and the inner wrap anchors 42 are attached to the upper rail 35 instead of the fixed frame 46 so that the load applied to the seat belt 40 is supported by the slide rail 5 and the belt cable guide 61 and The reinforcing frame 90 is also attached to the upper rail 35 side.
　ベルト用プリテンショナー１０Ｂのシリンダ１１も、所定長さに形成し、左右のケーブルガイド６１間にワイヤケーブル１３を必要量牽引できるための移動スペースを持って、配置する。 The cylinder 11 of the belt pretensioner 10B is also formed in a predetermined length, and is arranged with a moving space for pulling a required amount of the wire cable 13 between the left and right cable guides 61.
　即ち、シリンダ１１の移動量が左右のケーブルガイド６１間に収まるように、シリンダ１１の直径および長さとワイヤケーブル１３の牽引量とを考慮して設定する。また、シリンダ１１は、左右のケーブルガイド６１間に位置するが、シリンダ１１のシリンダ側ワイヤ係止部１７とケーブルガイド６１との間隔ｈよりも、シリンダ１１のマイクロガスジェネレータハウジング２３とケーブルガイド６１との間隔Ｈが広くなるように、配置構成する。 That is, it is set in consideration of the diameter and length of the cylinder 11 and the pulling amount of the wire cable 13 so that the moving amount of the cylinder 11 is accommodated between the left and right cable guides 61. The cylinder 11 is positioned between the left and right cable guides 61, but the micro gas generator housing 23 of the cylinder 11 and the cable guide 61 are larger than the distance h between the cylinder side wire locking portion 17 of the cylinder 11 and the cable guide 61. Is arranged so that the distance H between the
　したがって、左右のケーブルガイド６１とシリンダ１１（ピストンロッド２１）とが干渉するのを防止して、ワイヤケーブル１３の移動を安定させて、ベルト用プリテンショナー１０Ｂの作動の確実性を向上させる。 Therefore, interference between the left and right cable guides 61 and the cylinder 11 (piston rod 21) is prevented, the movement of the wire cable 13 is stabilized, and the reliability of the operation of the belt pretensioner 10B is improved.
　また、シリンダ１１は、左右のケーブルガイド６１間の第１ケーブル１３Ａと第２ケーブル１３Ｂにより宙吊り状態に設ける。したがって、シリンダ１１はワイヤケーブル１３により支持される。この場合、ベルト用プリテンショナー１０Ｂのシリンダ１１と、前記座席移動用プリテンショナー１０Ａのシリンダ１１と前後に並設する（図１６，図１７）。 Further, the cylinder 11 is provided in a suspended state by the first cable 13A and the second cable 13B between the left and right cable guides 61. Therefore, the cylinder 11 is supported by the wire cable 13. In this case, the cylinder 11 of the belt pretensioner 10B and the cylinder 11 of the seat moving pretensioner 10A are arranged side by side (FIGS. 16 and 17).
　実施例では、座席移動用プリテンショナー１０Ａのシリンダ１１は、ベルト用プリテンショナー１０Ｂのシリンダ１１の前側に位置させる。即ち、シートボトム３が後方移動するとき、座席移動用プリテンショナー１０Ａのシリンダ１１はシートボトム３と共に後方移動するが、ベルト用プリテンショナー１０Ｂのシリンダ１１は略同じ場所に位置するので、座席移動用プリテンショナー１０Ａのシリンダ１１を、ベルト用プリテンショナー１０Ｂのシリンダ１１の前側に位置させ、夫々のシリンダ１１が牽引するワイヤケーブル１３の牽引量を充分に確保して、作動を安定させる。 In the embodiment, the cylinder 11 of the seat moving pretensioner 10A is positioned in front of the cylinder 11 of the belt pretensioner 10B. That is, when the seat bottom 3 moves rearward, the cylinder 11 of the seat moving pretensioner 10A moves rearward together with the seat bottom 3, but the cylinder 11 of the belt pretensioner 10B is located at substantially the same location. The cylinder 11 of the pretensioner 10A is positioned on the front side of the cylinder 11 of the belt pretensioner 10B, and a sufficient pulling amount of the wire cable 13 pulled by each cylinder 11 is secured to stabilize the operation.
　また、座席移動用プリテンショナー１０Ａのシリンダ１１は、ベルト用プリテンショナー１０Ｂのシリンダ１１よりも上方に位置させ、座席移動用プリテンショナー１０Ａのシリンダ１１がシートボトム３と共に後方移動したベルト用プリテンショナー１０Ｂのシリンダ１１に干渉しないように位置させる（図１７）。 The cylinder 11 of the seat moving pretensioner 10A is positioned above the cylinder 11 of the belt pretensioner 10B, and the cylinder 11 of the seat moving pretensioner 10A moves rearward together with the seat bottom 3 to the belt pretensioner 10B. The cylinder 11 is positioned so as not to interfere with the cylinder 11 (FIG. 17).
　また、前記座席移動用プリテンショナー１０Ａのケーブルガイド６１は、前記ベルト用プリテンショナー１０Ｂのケーブルガイド６１が案内する前記ワイヤケーブル１３より内側に前記座席移動用プリテンショナー１０Ａのワイヤケーブル１３を位置させて案内するように配置構成する（図１６）。 Further, the cable guide 61 of the seat moving pretensioner 10A has the wire cable 13 of the seat moving pretensioner 10A positioned inside the wire cable 13 guided by the cable guide 61 of the belt pretensioner 10B. It arranges and arranges so that it may guide (FIG. 16).
　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。また、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。 65 is a tongue plate provided in the middle part of the seat belt 40, and 66 is an inner buckle. In addition, when the tongue plate 65 is engaged with the inner buckle 66, the seat belt 40 has a shoulder belt 67 from the vicinity of the shoulder of the seated person on one end side of the belt retractor 47 to the tongue plate 65. Up to the plate 41 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。また、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 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. However, the tongue plate 65 is configured not to move with respect to the seat belt 40 when the normal seat belt 40 is pulled out. Yes.
（実施例の作用）
　（作動装置の作用）
　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等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で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 actuator)
For example, the pretensioner 10 such as the seat pretensioner 10A and the belt pretensioner 10B generates a large amount of gas by the micro gas generator 28 when the impact detector 34 detects an impact, and the cylinder on one side of the piston 12 is used. 11, the piston 12 is moved instantaneously 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がピストン１２とシリンダ１１との互いの反対方向への移動により牽引され、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。 The pretensioner 10 is pulled by the movement of the first cable 13A and the second cable 13B of the wire cable 13 locked to the locking portion T in the opposite directions of the piston 12 and the cylinder 11, respectively, The movable member K to be restrained is operated to restrain the seated person.
　この場合、ワイヤーケーブル１３の端部はピストンロッド２１に係止し、ピストンロッド２１はシリンダ１１に移動自在に挿通しているから、ワイヤケーブル１３がシリンダ１１（ガス噴出室２０）内で直接ガスジェネレータ１６のガスに晒されることがなく、ワイヤケーブル１３の強度低下を防止する。 In this case, since the end of the wire cable 13 is locked to the piston rod 21 and the piston rod 21 is movably inserted into the cylinder 11, the wire cable 13 directly gasses in the cylinder 11 (gas ejection chamber 20). The strength of the wire cable 13 is prevented from being lowered without being exposed to the gas of the generator 16.
　また、ピストンロッド２１は筒部材２２に挿通し、ピストンロッド２１の外面はワイヤケーブル１３に比し平滑なので筒部材２２のオーリング３８との密着性が向上し、ガスジェネレータ１６から発生したガスがシリンダ１１から漏れるのを極力防止する。 Further, the piston rod 21 is inserted into the cylindrical member 22, and the outer surface of the piston rod 21 is smoother than the wire cable 13, so that the adhesion with the O-ring 38 of the cylindrical member 22 is improved, and the gas generated from the gas generator 16 is increased. Leakage from the cylinder 11 is prevented as much as possible.
　また、オーリング３８は筒部材２２の内周面に設けているから、オーリング３８がガス噴出室２０内に露出する構造に比し、シール性の信頼性・耐久性を向上させる。 In addition, since the O-ring 38 is provided on the inner peripheral surface of the cylindrical member 22, the reliability and durability of the sealing performance are improved as compared with the structure in which the O-ring 38 is exposed in the gas ejection chamber 20.
　ピストンロッド２１を支持案内する筒部材２２は、前記シリンダ１１のシリンダ側ワイヤ係止部１７の反対側のシリンダ１１の内側に、シリンダ１１の軸心方向と平行に設けているから、シリンダ１１の全体長を長くしなくて済み、シリンダ１１を小型化する。 The cylindrical member 22 that supports and guides the piston rod 21 is provided inside the cylinder 11 on the opposite side of the cylinder side wire locking portion 17 of the cylinder 11 in parallel with the axial direction of the cylinder 11. It is not necessary to lengthen the overall length, and the cylinder 11 is downsized.
　また、筒部材２２はシリンダ１１内に所定長さを有して突出形成しているから、前記ピストンロッド２１の長さをシリンダ１１の長さより短く形成する。したがって、ピストン１２と共にピストンロッド２１が移動しても、ピストンロッド２１の外周を筒部材２２が包囲しており、シリンダ１１からのガス漏れを防止する。 Further, since the cylindrical member 22 protrudes into the cylinder 11 with a predetermined length, the length of the piston rod 21 is formed shorter than the length of the cylinder 11. Therefore, even if the piston rod 21 moves together with the piston 12, the cylinder member 22 surrounds the outer periphery of the piston rod 21, thereby preventing gas leakage from the cylinder 11.
　筒部材２２の長さを長くすると、シリンダ１１内のピストン１２の移動量が短くなるので、シリンダ１１内でのピストン１２の移動量による制約の許す範囲で筒部材２２の長さを可及的に長くするように構成しているから、筒部材２２を長くした分ピストンロッド２１の長さを短くして、シリンダ１１から外部に露出するピストンロッド２１の長さを短くする。 When the length of the cylindrical member 22 is increased, the moving amount of the piston 12 in the cylinder 11 is shortened. Therefore, the length of the cylindrical member 22 is made as much as possible within the range permitted by the moving amount of the piston 12 in the cylinder 11. Since the length of the piston rod 21 is shortened by the length of the cylindrical member 22, the length of the piston rod 21 exposed to the outside from the cylinder 11 is shortened.
　そのため、ワイヤケーブル１３に比し可撓性のないピストンロッド２１が他の構成品と干渉するのを極力防止する。 Therefore, the piston rod 21 which is not flexible as compared with the wire cable 13 is prevented from interfering with other components as much as possible.
　ピストン１２が移動する距離（ワイヤケーブル１３の牽引長さ）に対してピストンロッド２１の長さは短くなるように構成しているから、シリンダ１１から外部に露出するピストンロッド２１の長さを短くして、ピストンロッド２１が他の構成品と干渉するのを防止する。 Since the length of the piston rod 21 is configured to be shorter than the distance (the pulling length of the wire cable 13) that the piston 12 moves, the length of the piston rod 21 exposed from the cylinder 11 to the outside is shortened. Thus, the piston rod 21 is prevented from interfering with other components.
　この場合、筒部材２２とピストンロッド２１を合わせた長さは、ピストン１２が移動する距離（ワイヤケーブル１３の牽引長さ）よりも長くなるように構成しているから、ピストンロッド２１（ピストン１２）が最もマイクロガスジェネレータハウジング２３から遠くへ移動したときでも、ピストンロッド２１のケーブルカシメ部２５は筒部材２２内に留まり、筒部材２２のオーリング３８によるガスジェネレータ１６から発生したガスがシリンダ１１から漏れるのを防止する。 In this case, since the combined length of the cylindrical member 22 and the piston rod 21 is configured to be longer than the distance that the piston 12 moves (the pulling length of the wire cable 13), the piston rod 21 (piston 12). ) Moves farthest from the micro gas generator housing 23, the cable caulking portion 25 of the piston rod 21 remains in the cylindrical member 22, and the gas generated from the gas generator 16 by the O-ring 38 of the cylindrical member 22 is retained in the cylinder 11. To prevent leakage.
　また、シリンダ１１はシートボトム３の左右幅より短い長さに形成し、ケーブルガイド６１はシリンダ１１の左右両側のシートボトム３の下方に設けているので、シリンダ１１は左右のケーブルガイド６１間でワイヤケーブル１３を牽引し、プリテンショナー１０を安定して作動させる。 Further, the cylinder 11 is formed to be shorter than the left and right widths of the seat bottom 3 and the cable guides 61 are provided below the seat bottoms 3 on both the left and right sides of the cylinder 11. The wire cable 13 is pulled and the pretensioner 10 is stably operated.
　また、シリンダ１１は、左右のケーブルガイド６１の間に、ワイヤケーブル１３の一対の第１ケーブル１３Ａと第２ケーブル１３Ｂにより宙吊り状態に設けているので、シリンダ１１はワイヤケーブル１３により支持され、特別に専用の取付部材を用意しなくて済み、シリンダ１１の取付作業を容易にする。 Since the cylinder 11 is suspended between the left and right cable guides 61 by the pair of the first cable 13A and the second cable 13B of the wire cable 13, the cylinder 11 is supported by the wire cable 13 and is specially provided. This eliminates the need for preparing a dedicated mounting member, and facilitates the mounting work of the cylinder 11.
　また、プリテンショナー１０が作動してピストン１２が移動すると、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を作動させて、ピストン１２の戻りを阻止する。 Further, when the pretensioner 10 is actuated to move the piston 12, even if an opposite load is applied to pull back the wire cable 13, 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。 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.
　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。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。 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. 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.
　しかして、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の前後両側部部分には、棒状形状の取付部材５７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。 Thus, rod-shaped attachment members 57 are provided on both front and rear side portions of the pair of left and right side members 55 of the seat bottom frame 51 of the seat bottom 3, and the attachment members 57 are attached long in the front and rear directions provided on the fixed frame 46. Since the seat bottom 3 is inserted in the hole 56 so as to be relatively movable, the seat bottom frame 51 moves rearward with respect to the fixed frame 46.
　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。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。 Therefore, the seat bottom 3 more securely supports the seat occupant by the rearward movement of the seat bottom 3, and the restraining effect of the seat occupant on the vehicle seat 1 is improved. 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.
　スライドレール５側に固定した固定フレーム４６（係止部Ｔ）に、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の夫々の端部を係止し、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側に接続したピストンロッド２１に、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側に夫々接続しているから、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、ワイヤケーブル１３を牽引して、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 ends of the first cable 13A and the second cable 13B of the pair of left and right wire cables 13 are locked to a fixed frame 46 (locking portion T) fixed to the slide rail 5 side, and the first end of the wire cable 13 is locked. The tip of one of the cable 13A and the second cable 13B is connected to the piston rod 21 connected to the piston 12 provided in the cylinder 11 of the seat pretensioner 10A, and either the first cable 13A or the second cable 13B. Since the other tip is connected to the cylinder 11 side, when the impact is detected by the impact detection device 34 provided at the desired position of the vehicle body, the seat pretensioner 10A pulls the wire cable 13 to seat the bottom frame 51. And the seat bottom 3 is moved backward.
　シート用プリテンショナー１０Ａ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の多量のガスにより瞬時に移動するピストン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 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 the cylinder 11 is movable only in the direction of the axis of the cylinder 11. Since it is installed, the reaction force of the piston 12 that instantaneously moves due to a large amount of gas from the gas generator 16 acts on the movable cylinder 11, and the piston 12 and the cylinder 11 move in the opposite directions.
　したがって、ピストン１２に取り付けたピストンロッド２１に係止した第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。 Therefore, the first cable 13A locked to the piston rod 21 attached to the piston 12 and the second cable 13B connected to the cylinder 11 are pulled at substantially the same amount to move the seat bottom frame 51 rearward. Therefore, the number of components of the seated person restraining mechanism can be reduced and provided at low cost.
　しかして、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の前側下面に取付け、シートボトムフレーム５１の左右両側中間部分にケーブルガイド６１を設け、各ケーブルガイド６１から第１ケーブル１３Ａと第２ケーブル１３Ｂの夫々を固定フレーム４６の後部方向側に方向変換させて位置させ、固定フレーム４６（係止部Ｔ）の後部に係止しているから、第１ケーブル１３Ａと第２ケーブル１３Ｂの互いの相対的短縮方向への移動の際の車両シート１の他の構成品との接触を防止して、良好かつ確実にでき、シートボトム３の後方移動によって着座者の移動量を減少させ、着座者の車両シート１への拘束効果を向上させる。 Thus, the cylinder 11 of the seat pretensioner 10A is attached to the front lower surface of the seat bottom frame 51, and cable guides 61 are provided at the left and right intermediate portions of the seat bottom frame 51. Since each of the cables 13B is changed in position toward the rear side of the fixed frame 46 and is locked to the rear portion of the fixed frame 46 (locking portion T), the first cable 13A and the second cable 13B are mutually connected. This prevents the vehicle seat 1 from coming into contact with other components when moving in the direction of relative shortening of the seat, and makes it possible to ensure good and reliable. The restraining effect on the vehicle seat 1 is improved.
　また、シート用プリテンショナー１０Ａは、ひとつのシリンダ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構成しているから、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, the seat pretensioner 10A is configured by disposing one cylinder 11 below the front lower surface of the seat bottom frame 51 of the seat bottom 3 so that the axial direction of the cylinder 11 is the left-right direction. Therefore, the seat occupant restraint mechanism can be installed without sacrificing the legability of the occupant seated on the vehicle seat 1 behind the vehicle seat 1, and on the other hand, the operation of the seat pretensioner 10A can be performed reliably and reliably. .
　また、シート用プリテンショナー１０Ａのシリンダ１１は、左右のベルト用ケーブルガイド６１の間に、前記ワイヤケーブル１３の一対の第１ケーブル１３Ａと第２ケーブル１３Ｂにより宙吊り状態に設け、シリンダ１１をワイヤケーブル１３により支持するように構成しているから、シリンダ１１はワイヤケーブル１３により支持され、特別に専用の取付部材を用意しなくて済み、シリンダ１１の取付作業を容易にする。 Further, the cylinder 11 of the seat pretensioner 10A is suspended between the left and right belt cable guides 61 by the pair of the first cable 13A and the second cable 13B of the wire cable 13, and the cylinder 11 is connected to the wire cable. Since the cylinder 11 is supported by the wire 13, the cylinder 11 is supported by the wire cable 13, and it is not necessary to prepare a special mounting member.
　シート用プリテンショナー１０Ａのシリンダ１１は左右のケーブルガイド６１間にワイヤケーブル１３を必要量牽引できるための移動スペースを持って、配置しているから、ガスジェネレータ１６の作用でシリンダ１１自体が移動しても、シリンダ１１がケーブルガイド６１と接触するのを防止し、作動を確実にする。 The cylinder 11 of the seat pretensioner 10 </ b> A has a moving space for pulling the required amount of the wire cable 13 between the left and right cable guides 61, so that the cylinder 11 itself moves by the action of the gas generator 16. However, the cylinder 11 is prevented from coming into contact with the cable guide 61, and the operation is ensured.
　また、シリンダ１１は、左右のケーブルガイド６１間に位置するが、シリンダ１１のシリンダ側ワイヤ係止部１７とケーブルガイド６１との間隔ｈよりも、シリンダ１１のマイクロガスジェネレータハウジング２３（ハウジング部材２３Ａ）とケーブルガイド６１との間隔Ｈが広くなるように配置構成しているから、左右のケーブルガイド６１とシリンダ１１（ピストンロッド２１）とが干渉するのを防止して、ワイヤケーブル１３の移動を安定させて、シート用プリテンショナー１０Ａの作動の確実性を向上させる。 The cylinder 11 is positioned between the left and right cable guides 61, but the micro gas generator housing 23 (housing member 23 </ b> A) of the cylinder 11 is larger than the distance h between the cylinder side wire locking portion 17 of the cylinder 11 and the cable guide 61. ) And the cable guide 61 are arranged so that the distance H is widened, so that the left and right cable guides 61 and the cylinder 11 (piston rod 21) are prevented from interfering with each other and the wire cable 13 is moved. It stabilizes and improves the certainty of operation | movement of 10 A of sheet | seat pretensioners.
　（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、係止部Ｔをアンカープレート４１またはインナーラップアンカー４２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り、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の両方を牽引して、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。 (Seat belt operation)
The movable member K is a seat belt tensioning device that tensions the entire tension of the seat belt 40, the locking portion T is an anchor plate 41 or an inner wrap anchor 42, and a belt pretensioner 10B that tensions the seat belt 40 is provided. The pretensioner 10 is used to further improve the restraining effect of the occupant on the vehicle seat 1. The seat belt 40 is formed by the belt pretensioner 10 </ b> B to the left and right anchor plates 41 or inner wrap anchors 42. The belt pretensioner 10 </ b> B is configured to pull both of them to increase the overall tension of the seat belt 40, and the belt pretensioner 10 </ b> B detects the impact by the impact detection device provided at the desired position of the vehicle body. The wire cable 13 is pulled instantaneously with pressure, and the seat base The door 40 is tensioned to restrain the occupant in the vehicle seat 1.
　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に取付けたピストンロッド２１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の端部に接続しているから、ベルト用プリテンショナー１０Ｂのひとつのシリンダ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 rod 21 attached to the piston 12 provided in the cylinder 11 of the belt pretensioner 10B, and the first cable 13A and the second cable 13B are connected. Since either one of the cables 13B is connected to the end of the cylinder 11, the left and right anchor plates 41 and the inner wrap anchors 42 are pulled almost simultaneously by one cylinder 11 of the belt pretensioner 10B, and the occupant is moved to the vehicle. Restrain to sheet 1.
　即ち、ベルト用プリテンショナー１０Ｂのシリンダ１１は、該シリンダ１１の軸芯が車両シート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 axis of the cylinder 11 is parallel to the pulling direction of the wire cable 13 with respect to the vehicle seat 1 or the vehicle body, and the axis of the cylinder 11 Since the cylinder 11 is movably installed only in the cylinder 11, 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, so that the piston 12 and the cylinder 11 are opposite to each other. Moving.
　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は、シートボトムフレーム５１の前側下方に設け、シートボトムフレーム５１の下方の左右両側部分にケーブルガイド６１を設け、各ケーブルガイド６１から第１ケーブル１３Ａと第２ケーブル１３Ｂの夫々を固定フレーム４６の側方に方向変換させて位置させ、夫々アンカープレート４１およびインナーラップアンカー４２（係止部Ｔ）に係止しているから、第１ケーブル１３Ａと第２ケーブル１３Ｂの互いの相対的短縮方向への移動の際の車両シート１の他の構成品との接触を防止して、良好かつ確実にでき、シートベルト４０の緊張を迅速にして、着座者の車両シート１への拘束効果を向上させる。 In this case, the belt pretensioner 10 </ b> B is provided below the front side of the seat bottom frame 51, and cable guides 61 are provided on both left and right sides below the seat bottom frame 51, and the first cable 13 </ b> A and the second cable are connected to each cable guide 61. Since each of 13B is changed in the direction of the side of the fixed frame 46 and is positioned and locked to the anchor plate 41 and the inner wrap anchor 42 (locking portion T), respectively, the first cable 13A and the second cable 13B. The vehicle seat 1 is prevented from coming into contact with other components during the movement in the relative shortening direction, and it is possible to achieve good and reliable, and the tension of the seat belt 40 can be quickly increased, so that the seated vehicle seat Improve the restraining effect to 1.
　また、ベルト用プリテンショナー１０Ｂのシリンダ１１は前記シートボトム３の左右幅より短い長さに形成し、前記ケーブルガイド６１は前記シリンダ１１の左右両側のシートボトム３の下方に設けているから、ベルト用プリテンショナー１０Ｂを小型に構成でき、設置スペースを小さくできる。 Further, the cylinder 11 of the belt pretensioner 10B is formed to have a length shorter than the left and right width of the seat bottom 3, and the cable guide 61 is provided below the seat bottom 3 on both the left and right sides of the cylinder 11. The pretensioner 10B can be configured in a small size, and the installation space can be reduced.
　また、ベルト用プリテンショナー１０Ｂの前記シリンダ１１も、左右のベルト用ケーブルガイド６１の間に、前記ワイヤケーブル１３の一対の第１ケーブル１３Ａと第２ケーブル１３Ｂにより宙吊り状態に設け、シリンダ１１をワイヤケーブル１３により支持するように構成しているから、シリンダ１１はワイヤケーブル１３により支持され、特別に専用の取付部材を用意しなくて済み、シリンダ１１の取付作業を容易にする。 Further, the cylinder 11 of the belt pretensioner 10B is also provided in a suspended state by a pair of first cable 13A and second cable 13B of the wire cable 13 between the left and right belt cable guides 61. Since it is configured to be supported by the cable 13, the cylinder 11 is supported by the wire cable 13, and it is not necessary to prepare a special mounting member, thereby facilitating the mounting operation of the cylinder 11.
　また、ベルト用プリテンショナー１０Ｂのシリンダ１１と、前記座席移動用プリテンショナー１０Ａのシリンダ１１と前後に並設しているので、座席移動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の両者を、車両シートに併存させて装着することができる。 Further, since the cylinder 11 of the belt pretensioner 10B and the cylinder 11 of the seat moving pretensioner 10A are arranged in front and rear, both the seat moving pretensioner 10A and the belt pretensioner 10B are connected to the vehicle seat. It can be installed together.
　この場合、座席移動用プリテンショナー１０Ａのシリンダ１１は、ベルト用プリテンショナー１０Ｂのシリンダ１１の前側に位置させているから、夫々のシリンダ１１が牽引するワイヤケーブル１３の牽引量を充分に確保でき、作動を安定させて、好適である。 In this case, since the cylinder 11 of the seat movement pretensioner 10A is positioned on the front side of the cylinder 11 of the belt pretensioner 10B, a sufficient pulling amount of the wire cable 13 pulled by each cylinder 11 can be secured. It is preferable because the operation is stabilized.
　また、座席移動用プリテンショナー１０Ａのシリンダ１１は、ベルト用プリテンショナー１０Ｂのシリンダ１１よりも上方に位置させているから、座席移動用プリテンショナー１０Ａのシリンダ１１がシートボトム３と共に後方移動するとき、ベルト用プリテンショナー１０Ｂのシリンダ１１に干渉しない。 Further, since the cylinder 11 of the seat movement pretensioner 10A is positioned above the cylinder 11 of the belt pretensioner 10B, when the cylinder 11 of the seat movement pretensioner 10A moves backward together with the seat bottom 3, It does not interfere with the cylinder 11 of the belt pretensioner 10B.
　また、前記座席移動用プリテンショナー１０Ａのケーブルガイド６１は、前記ベルト用プリテンショナー１０Ｂのケーブルガイド６１が案内する前記ワイヤケーブル１３より内側に前記座席移動用プリテンショナー１０Ａのワイヤケーブル１３を位置させて案内するように配置構成しているから、座席移動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の両者が牽引するワイヤケーブル１３の夫々が干渉せず、作動を確実にする。 Further, the cable guide 61 of the seat moving pretensioner 10A has the wire cable 13 of the seat moving pretensioner 10A positioned inside the wire cable 13 guided by the cable guide 61 of the belt pretensioner 10B. Since they are arranged and guided, the wire cables 13 pulled by both the seat moving pretensioner 10A and the belt pretensioner 10B do not interfere with each other, and the operation is ensured.
　また、左右の固定フレーム４６はシートボトムフレーム５１の外側に位置するので、固定フレーム４６の内側をシートボトム３が移動する座席移動用プリテンショナー１０Ａのワイヤケーブル１３は固定フレーム４６の内側に位置し、左右の固定フレーム４６の外側に位置する前記アンカープレート４１およびインナーラップアンカー４２を牽引するベルト用プリテンショナー１０Ｂのワイヤケーブル１３は固定フレーム４６の外側に位置して、作動を安定させると共に、作動スペースを有効利用でき、全体が合理的構成となる。 Since the left and right fixed frames 46 are positioned outside the seat bottom frame 51, the wire cable 13 of the seat moving pretensioner 10 </ b> A in which the seat bottom 3 moves inside the fixed frame 46 is positioned inside the fixed frame 46. The wire cable 13 of the belt pretensioner 10B that pulls the anchor plate 41 and the inner wrap anchor 42 positioned outside the left and right fixed frames 46 is positioned outside the fixed frame 46 to stabilize and operate. Space can be used effectively, and the whole structure is rational.
　しかして、ベルト用プリテンショナー１０Ｂのシリンダ１１は左右のケーブルガイド６１間にワイヤケーブル１３を必要量牽引できるための移動スペースを持って、配置しているから、ガスジェネレータ１６の作用でシリンダ１１自体が移動しても、ケーブルガイド６１と接触するのを防止し、作動を確実にする。 Since the cylinder 11 of the belt pretensioner 10B has a moving space for pulling a required amount of the wire cable 13 between the left and right cable guides 61, the cylinder 11 itself is operated by the action of the gas generator 16. Even if it moves, the contact with the cable guide 61 is prevented and the operation is ensured.
　また、ベルト用プリテンショナー１０Ｂのシリンダ１１は、左右のケーブルガイド６１間に位置するが、シリンダ１１のシリンダ側ワイヤ係止部１７とケーブルガイド６１との間隔ｈよりも、シリンダ１１のマイクロガスジェネレータハウジング２３（ハウジング部材２３Ａ）とケーブルガイド６１との間隔Ｈが広くなるように配置構成しているから、左右のケーブルガイド６１とシリンダ１１（ピストンロッド２１）とが干渉するのを防止して、ワイヤケーブル１３の移動を安定させて、プリテンショナー１０の作動の確実性を向上させる。 The cylinder 11 of the belt pretensioner 10B is located between the left and right cable guides 61, but the micro gas generator of the cylinder 11 is larger than the distance h between the cylinder side wire locking portion 17 of the cylinder 11 and the cable guide 61. Since the arrangement H is made so that the distance H between the housing 23 (housing member 23A) and the cable guide 61 is wide, the left and right cable guides 61 and the cylinder 11 (piston rod 21) are prevented from interfering with each other, The movement of the wire cable 13 is stabilized and the certainty of the operation of the pretensioner 10 is improved.

Claims (11)

  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、前記ピストンはピストンロッドを介して前記第２ケーブルに接続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. A pretensioner having a gas generator that moves in a second direction opposite to one direction, wherein the piston is connected to the second cable via a piston rod.
  2. 請求項１において、前記膨張チャンバー内には筒部材を設け、該筒部材に前記ピストンロッドを移動自在に挿通した車両シートのプリテンショナー。 The vehicle seat pretensioner according to claim 1, wherein a cylindrical member is provided in the expansion chamber, and the piston rod is movably inserted into the cylindrical member.
  3. 請求項２において、前記筒部材の内周面にはオーリングを設けた車両シートのプリテンショナー。 The vehicle seat pretensioner according to claim 2, wherein an O-ring is provided on an inner peripheral surface of the cylindrical member.
  4. 請求項３において、前記筒部材は所定長さを有して形成し、前記ピストンロッドの長さをシリンダの長さよりも短く形成した車両シートのプリテンショナー。 The vehicle seat pretensioner according to claim 3, wherein the cylindrical member is formed to have a predetermined length, and the length of the piston rod is shorter than the length of the cylinder.
  5. 請求項４において、前記筒部材の長さは、シリンダ内でのピストンの移動量による制約の許す範囲で可及的に長くするように構成した車両シートのプリテンショナー。 5. The vehicle seat pretensioner according to claim 4, wherein the length of the cylindrical member is set to be as long as possible within a range permitted by a restriction by a moving amount of the piston in the cylinder.
  6. 請求項５において、前記ピストンロッドの長さは、ピストンがシリンダ内を移動する距離よりも短くなるように構成した車両シートのプリテンショナー。 6. The vehicle seat pretensioner according to claim 5, wherein the length of the piston rod is shorter than the distance that the piston moves in the cylinder.
  7. 請求項６において、前記筒部材とピストンロッドとを合わせた長さは、前記ピストンが移動する距離より長くなるように構成した車両シートのプリテンショナー。 The vehicle seat pretensioner according to claim 6, wherein the combined length of the cylindrical member and the piston rod is longer than a distance that the piston moves.
  8. 請求項７において、前記ワイヤケーブルの一対の第１ケーブルと第２ケーブルの夫々の一端はシリンダのシリンダ側ワイヤ係止部および前記ピストンロッドに夫々接続し、該第１ケーブルと第２ケーブルの他端部は任意の係止部に夫々接続し、前記シリンダと前記係止部とは、シリンダの軸心方向は左右方向とし、前記係止部は前記シリンダの軸心方向に対して交差方向に前記ワイヤケーブルが牽引されるように夫々配置し、前記シリンダと前記係止部の夫々の第１ケーブルと第２ケーブルの中間位置には、前記シリンダおよびピストンによるワイヤケーブルの左右方向の移動方向を、前後方向に変換する左右一対のケーブルガイドを設け、前記シリンダは、該シリンダ自体の移動量が左右のケーブルガイド間に収まるように設定した車両シートのプリテンショナー。 8. The wire cable according to claim 7, wherein one end of each of the pair of the first cable and the second cable of the wire cable is connected to a cylinder side wire locking portion of the cylinder and the piston rod, respectively. End portions are connected to arbitrary locking portions, respectively, and the cylinder and the locking portion have a cylinder axial direction in the left-right direction, and the locking portion intersects the cylinder axial direction. The wire cables are arranged so as to be pulled, and the movement direction of the wire cable in the left-right direction by the cylinder and the piston is set at an intermediate position between the first cable and the second cable of the cylinder and the locking portion, respectively. A pair of left and right cable guides for conversion in the front-rear direction, and the cylinder is configured such that the amount of movement of the cylinder itself is set between the left and right cable guides. Capital of the pre-tensioner.
  9. 請求項８において、前記シリンダのピストンロッドのケーブルカシメ部とケーブルガイドの間にはワイヤケーブルの一部が位置するように、前記ピストンロッドのケーブルカシメ部とケーブルガイドとの間に所定の間隔を設けて配置構成した車両シートのプリテンショナー。 9. A predetermined gap between the cable caulking portion of the piston rod and the cable guide so that a part of the wire cable is located between the cable caulking portion of the piston rod of the cylinder and the cable guide. Vehicle seat pretensioner provided and arranged.
  10. 請求項９において、前記左右のケーブルガイド間に位置するシリンダは、シリンダのシリンダ側ワイヤ係止部とケーブルガイドとの第１間隔よりも、シリンダのピストンロッドのケーブルカシメ部とケーブルガイドとの第２間隔が広くなるように、配置構成した車両シートのプリテンショナー。 10. The cylinder located between the left and right cable guides according to claim 9, wherein the cylinder caulking portion of the piston rod of the cylinder and the cable guide are positioned at a distance greater than the first distance between the cylinder side wire locking portion of the cylinder and the cable guide. A pretensioner for a vehicle seat that is arranged so that the distance between the two is wide.
  11. 請求項１０において、前記シリンダは左右のケーブルガイドの間に第１ケーブルと第２ケーブルにより宙吊り状態に設けて構成した車両シートのプリテンショナー。 11. The vehicle seat pretensioner according to claim 10, wherein the cylinder is provided in a suspended state by a first cable and a second cable between left and right cable guides.
PCT/JP2008/073359 2007-12-21 2008-12-22 Pretensioner for vehicle seat WO2009081917A1 (en)

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JP2007331156A JP5311815B2 (en) 2007-12-21 2007-12-21 Vehicle seat
JP2007-331156 2007-12-21

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JP5486349B2 (en) * 2010-03-01 2014-05-07 テイ・エス テック株式会社 Vehicle seat

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001301565A (en) * 2000-04-19 2001-10-31 Nsk Ltd Seat belt device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001301565A (en) * 2000-04-19 2001-10-31 Nsk Ltd Seat belt device

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