JP2010064537A - Seat belt apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat belt apparatus capable of reliably and easily mounting a boot in a stable manner with a simple structure. <P>SOLUTION: The seat belt device comprises a pretensioner mechanism 3 which is connected to one end of a seat belt via a wire 2 to retract the seat belt when a shock of the predetermined value or more is applied to a vehicle, and a cylindrical boot 4 for covering the periphery of the wire 2. The pretensioner mechanism 3 has a claw part 9c which is fixed to a vehicle body 1 to lock the boot 4 at the position separate from the fastening position by a pretensioner fixing bolt 13. The boot 4 has on its lower part a through hole 4a through which the pretensioner fixing bolt 13 is passed, and an engagement hole 4c to which the claw part 9c is locked. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a seat belt device provided in a vehicle such as an automobile.

  Vehicles such as automobiles are equipped with a seat belt device to protect passengers from collisions. Conventionally, as such a seat belt device, a device having a pretensioner and operating the pretensioner to retract the belt when an impact of a predetermined value or more is applied to the vehicle is known.

  Usually, the pretensioner is fixed to the floor of the vehicle body and is connected to one end of the seat belt via a wire. Therefore, in such a seat belt device, the periphery of the wire is covered with a plastic boot formed in a cylindrical shape so as to avoid the exposure of the wire, and the lower end of the boot is pulled into the lower part of the floor to improve the appearance. We are trying to reduce the sense of harm.

  As a structure for attaching the boot to the periphery of the wire, a plurality of claw portions are provided in a sleeve inside the boot and the wire is inserted, and an engagement hole is provided at a position facing the claw portion of the boot. A device in which the claw portion is engaged with the engagement hole of the boot to stabilize the lower end position of the boot is disclosed (for example, see Patent Document 1).

  Patent Document 1 also describes a configuration in which the lower end of the boot is lowered to the position of the bolt for fixing the pretensioner, and the lower end of the boot is fastened to a resin bush fixed by the bolt.

JP 2005-81883 A

  However, in the configuration in which the claw portion of the sleeve as described in Patent Document 1 is engaged with the engagement hole of the boot, the engagement hole widens when the boot is pulled or the like, and the claw portion comes out of the engagement hole. As a result, the boot may come off, or the boot may break and become unable to engage with the claw portion. That is, the fixing of the boot was not reliable. In addition, in the configuration in which the lower end of the boot is fastened to the resin bush, the boot will not come off, but the boot must be fastened to the resin bush by sewing or welding, so the number of parts and man-hours for mounting are reduced. Increase. Further, when fixing the pretensioner, the bolt must be passed through the resin bush on the vehicle compartment side of the boot, then to the pretensioner, and further to the resin bush on the vehicle body side, which may deteriorate the workability. Further, since the boot is pivotally supported by the bolt, there is a possibility that the boot rotates around the bolt and the boot comes into contact with the wire or bends to deteriorate the appearance.

  In view of the above, an object of the present invention is to provide a seat belt device capable of securely and easily mounting a boot in a stable state with a simple structure.

  A seatbelt device according to a first invention for solving the above-described problems is configured to be connected to one end of a seatbelt via a wire, and to retract the seatbelt when a predetermined impact or more is applied to the vehicle. A seat belt device including a pretensioner mechanism and a cylindrical boot covering the periphery of the wire, wherein the pretensioner mechanism is fixed to the vehicle body of the vehicle by a bolt and spaced from a fastening position by the bolt The boot has a claw portion for locking the boot, and the boot has a through hole through which a bolt for fixing the pretensioner mechanism is inserted and an engagement hole for locking the claw portion. It is characterized by that.

  In a seat belt device according to a second invention for solving the above-mentioned problem, the through hole of the boot is formed so that the bolt is inserted between the pretensioner mechanism and the vehicle body side at the lower part of the boot. And a notch portion formed by notching a portion facing the bolt is formed in a portion of the lower portion of the boot facing the through hole on the vehicle compartment side.

  In a seatbelt device according to a third aspect of the present invention for solving the above-described problems, the bolt is inserted through a through hole of the boot through a spacer, and an outer diameter of an end of the spacer on the passenger compartment side is A larger diameter portion than the through hole of the boot, a washer is arranged on the outer periphery of the main body portion of the spacer, and the periphery of the through hole of the boot is sandwiched between the large diameter portion and the washer. Features.

  A seatbelt device according to a fourth aspect of the present invention for solving the above-described problem is the harness holding, wherein the locking claw is provided in the pretensioner mechanism and supports a part of the harness connected to the pretensioner mechanism. It is characterized by being formed by extending a plate bracket for a part.

  According to the above-described seat belt device according to the first invention, when the pretensioner mechanism is fixed to the vehicle body, the pretensioner fixing bolt is inserted into the through hole of the boot so that the lower portion of the boot is fixed securely. Furthermore, by locking the claw portion in the engagement hole provided in the boot, it is possible to prevent the boot from rotating or twisting with the position fastened by the bolt as a fulcrum. A stable configuration can be reliably maintained with a simple configuration.

  Further, according to the seat belt device according to the second invention described above, a portion of the boot facing the vehicle compartment side bolt is cut out to form a cutout portion, and the bolt is inserted and fixed only to the vehicle body side of the boot. Since it was set as the structure made, the operation | work which fastens a volt | bolt becomes easy and workability | operativity improves.

  Further, according to the above-described seat belt device according to the third aspect of the invention, the bolt is inserted into the through hole of the boot via the spacer, and the outer diameter of the end of the spacer on the passenger compartment side is larger than the through hole of the boot. Since the washer is provided on the outer periphery of the main body portion of the spacer and the periphery of the through hole of the boot is sandwiched between the large diameter portion and the washer, the boot can be held more reliably.

  Further, according to the seatbelt device according to the fourth invention described above, by extending the plate bracket for holding the harness that supports a part of the harness connected to the pretensioner mechanism, the claw portion is formed. Since one member serves as two roles, the number of parts can be reduced and the cost can be reduced.

  Hereinafter, embodiments of the present invention will be described in detail in Examples.

  An embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 is a plan view showing the structure of a boot mounting portion of a seat belt apparatus according to the present embodiment, FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1, and FIG. FIG. 4 is another perspective view showing the structure of the boot mounting portion of the seat belt device according to the present embodiment, and FIG. 5 is a perspective view showing the structure inside the boot of FIG.

  As shown in FIGS. 1 to 5, the seat belt device according to this embodiment is fixed to the vehicle body 1 so that a seat belt (not shown) is pulled in via a wire 2 when an impact of a predetermined value or more is applied to the vehicle. The pretensioner mechanism 3 is provided. In this seat belt device, a cylindrical boot 4 covering the wire 2 is provided around the wire 2 introduced into the pretensioner mechanism 3.

  In the present embodiment, the pretensioner mechanism 3 is inserted into the pretensioner body 6 for drawing the wire, the housing 5 to which the pretensioner body 6 is fixed, the sleeve 7 for regulating the direction of the wire 2, and the sleeve 7. The first spacer 10 for guiding the wire 2 toward the pretensioner body 6 and the bracket 9 for supporting the harness 8 connected to the pretensioner body 6 are provided.

  The pretensioner body 6 is composed of a cylindrical cylinder having a piston (not shown) connected to the wire 2 and an initiation device for operating the piston. When an impact of a predetermined value or more is applied to the vehicle, the initiation device 6 Is activated and the wire 2 is pulled.

  The housing 5 to which the pretensioner body 6 is fixed is formed in a plate shape and has a bolt hole 5a. The pretensioner body 6 is fixed to the vehicle body 1 via the housing 5 by a pretensioner fixing bolt 13 inserted through the bolt hole 5 a of the housing 5.

  Further, a sleeve 7 is fixed to one end of the housing 5 so as to be able to insert the wire 2 and restrict the direction of the wire 2 as described above. The sleeve 7 is disposed above the fastening position of the pretensioner fixing bolt 13 (see FIGS. 1 and 2).

  As shown in FIG. 2, the first spacer 10 for guiding the wire 2 is disposed between the pretensioner body 6 and the sleeve 7 and adjacent to the surface of the housing 5 on the vehicle body 1 side.

  The first spacer 10 is formed in a cylindrical shape, and a pretensioner fixing bolt 13 is inserted into the hollow portion. That is, the first spacer 10 is fixed to the vehicle body 1 together with the housing 5 by inserting the pretensioner fixing bolt 13 inserted through the bolt hole 5 a of the housing 5.

  Further, the first spacer 10 includes a main body portion 10a having an outer diameter larger than the diameter of the bolt hole 5a of the housing 5, a large diameter portion 10b provided at an end of the main body portion 10a on the vehicle body 1 side, It is comprised from the small diameter part 10c provided in the edge part by the side of the compartment of the main-body part 10a. The large-diameter portion 10b of the first spacer 10 has a larger outer diameter than the main body portion 10a, the small-diameter portion 10c has a smaller outer diameter than the main body portion 10a, and the small-diameter portion 10c is formed on the housing 5. It is inserted in the bolt hole 5a.

  The wire 2 extends from the sleeve 7 side to the pretensioner main body 6 side along the peripheral surface of the main body portion 10 a of the first spacer 10, in other words, the lower peripheral surface between the large diameter portion 10 b and the housing 5. It is guided to.

  A bracket 9 is disposed adjacent to the large diameter portion 10 b of the first spacer 10 on the vehicle body 1 side of the first spacer 10.

  The bracket 9 is a member that holds a harness 8 that is formed in a plate shape and connected to the pretensioner body 6, and includes a cylindrical harness holding portion 9 a that is formed so that the harness 8 can be inserted into a part thereof. . And the harness 8 is regulated in the radial position by being inserted into the harness holding portion 9a.

  Further, the bracket 9 is provided with a bolt hole 9b similarly to the housing 5, and is fixed to the vehicle body 1 by a pretensioner fixing bolt 13 inserted through the bolt hole 9b. Further, the bracket 9 is provided with a claw portion 9c formed by extending a part thereof. The claw portion 9c is a position separated from the bolt hole 9b by a predetermined distance, and has a height substantially equal to or lower than the bolt hole 9b (in the present embodiment, substantially the same height as the bolt hole 9b). In FIG. 1, it is formed so as to protrude toward the vehicle body 1 and its tip is bent at a substantially right angle (see FIGS. 1 and 5).

  As described above, the pretensioner mechanism 3 is integrated by fixing the constituent members to the vehicle body 1 by the bolts 13.

  As shown in FIGS. 1 and 2, the boot 4 is provided so as to cover the sleeve 7, the first spacer 10, the housing 5 and the bracket 9 in addition to the wire 2, and the lower end thereof is fixed to the pretensioner. It extends to the lower part of the fastening position by the bolt 13 for use.

  The boot 4 has a through hole 4a formed in the lower part on the vehicle body 1 side, and at least a lower end to an upper end of the pretensioner fixing bolt 13 in a portion on the vehicle compartment side facing the through hole 4a. A cutout portion 4b (see FIG. 4) is formed, and an engagement hole 4c that engages with the claw portion 9c is provided at a position facing the claw portion 9c of the boot 4.

  That is, in this embodiment, the boot 4 is fixed to the vehicle body 1 by the pretensioner fixing bolt 13 together with the pretensioner mechanism 3 only on the lower body 1 side, and the claw portion 9c of the bracket 9 is inserted into the engagement hole 4c. It is in a locked state.

  As shown in FIG. 2, in this embodiment, when the pretensioner mechanism 3 and the boot 4 are fixed to the vehicle body 1 by the pretensioner fixing bolts 13, the housing 5 and the first spacer are sequentially installed in the boot 4 from the vehicle compartment side. 10 and a bracket 9 are arranged.

  Further, a second spacer 11 formed in a cylindrical shape is disposed on the side of the vehicle body 1 of the bracket 9. Similarly to the first spacer 10, the second spacer 11 is inserted with a pretensioner fixing bolt 13 in the hollow portion. The second spacer 11 is formed so that the main body portion 11a can be inserted into the through hole 4a of the boot 4 and has a larger outer diameter than the through hole 4a of the boot 4 at the end portion of the main body portion 11a on the passenger compartment side. It has a portion 11b. The large diameter portion 11b of the second spacer 11 is located between the bracket 9 and the boot 4 and separates them. In addition, a washer 12 is provided on the outer periphery of the second spacer 11 and outside the boot 4 (on the vehicle body 1 side), and the periphery of the through hole 4a of the boot 4 is connected to the large-diameter portion 11b in the outer peripheral portion of the second spacer 11. It is sandwiched between washers 12. At this time, the boot 4 and the vehicle body 1 are in a separated state.

  According to the seatbelt device according to the present embodiment described above, the boot 4 is provided with the through hole 4a so that the boot 4 is fixed to the vehicle body 1 by the pretensioner fixing bolts 13, while being engaged with the boot 4. Since the hole 4c is provided and the claw portion 9c is formed in the bracket 9, and the claw portion 9c is locked to the engagement hole 4c, the lower portion of the boot 4 can be easily fixed. In addition, the boot 4 can be prevented from being twisted or rotated with the through hole 4a as a fulcrum, and the boot 4 can be maintained in a stable state.

  Further, by providing the notch 4 b in the boot 4, when the boot 4 is fixed to the pretensioner mechanism 3 side, the pretensioner fixing bolt 13 is inserted only into the through hole 4 a on the vehicle body 1 side of the boot 4. The boot 4 can be easily fixed. In addition, the state of the inside of the boot 4 can be easily confirmed by the notch 4b, and workability is improved.

  Further, the pretensioner fixing bolt 13 is inserted into the through hole 4 a formed in the boot 4 through the second spacer 11, and the washer 12 is provided between the boot 4 and the vehicle body 1. There is no possibility that the peripheral edge of the hole 4a is bitten by the pretensioner fixing bolt 13.

  In addition, a large-diameter portion 11b having an outer diameter larger than the through-hole 4a of the boot 4 is provided at the end of the second spacer 11 on the passenger compartment side. Therefore, the boot 4 can be securely held in a more stable state.

  In addition, since the harness holding portion 9a that restricts the radial position of the harness 8 by passing a part of the harness 8 connected to the pretensioner body 6 through the bracket 9 is provided, the harness 8 is held in a stable state. can do.

  In addition, since a part of the bracket 9 that holds the harness 8 is extended to provide a claw portion so that one member also serves two functions, the number of parts can be reduced and the cost can be reduced. be able to.

  In addition, this invention is not limited to the Example mentioned above, It cannot be overemphasized that a various change is possible in the range which does not deviate from the meaning of this invention.

  The present invention can be used for a seat belt device, and is particularly suitable for being applied to a seat belt device including a boot covering a wire connected to one end of a seat belt.

It is a top view which shows the structure of the lap pre-ten boot attaching part of the seatbelt apparatus which concerns on the Example of this invention. It is AA arrow sectional drawing of FIG. It is a perspective view which shows the structure of the lap preten boot attachment part of the seatbelt apparatus which concerns on the Example of this invention. It is another perspective view which shows the structure of the lap pre-ten boot attaching part of the seatbelt apparatus which concerns on the Example of this invention. It is a perspective view which shows the structure inside the boot of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car body 2 Wire 3 Pretensioner mechanism 4 Boot 4a Through-hole 4b Notch part 4c Engagement hole 5 Housing 5a Bolt hole 6 Pretensioner main body 7 Sleeve 8 Harness 9 Bracket 9a Harness holding part 9b Bolt hole 9c Claw part 10 First spacer 10a Main body portion 10b Large diameter portion 10c Small diameter portion 11 Second spacer 11a Main body portion 11b Large diameter portion 12 Washer 13 Pretensioner fixing bolt

Claims (4)

A pretensioner mechanism connected to one end of the seat belt via a wire and configured to retract the seat belt when a predetermined impact is applied to the vehicle; and a cylindrical boot covering the periphery of the wire In the seat belt device,
The pretensioner mechanism includes a claw portion that is fixed to a vehicle body of the vehicle by a bolt and that locks the boot at a position separated from a fastening position by the bolt,
The boot has a through hole into which a bolt for fixing the pretensioner mechanism is inserted, and an engagement hole into which the claw portion is locked. A through hole of the boot is formed so that the bolt is inserted between the pretensioner mechanism at the lower part of the boot and the vehicle body side, and a part on the vehicle compartment side facing the through hole at the lower part of the boot The seat belt device according to claim 1, wherein a notch portion is formed by notching a portion facing the bolt. The bolt is inserted into the through hole of the boot through a spacer, and the end of the spacer on the passenger compartment side has a larger diameter than the through hole of the boot. The seat according to any one of claims 1 to 2, wherein a washer is disposed on an outer periphery of the main body, and a periphery of the through hole of the boot is sandwiched between the large diameter portion and the washer. Belt device. The locking claw is formed by extending a plate-like bracket for a harness holding portion that is provided in the pretensioner mechanism and supports a part of the harness connected to the pretensioner mechanism. Item 4. The seat belt device according to any one of Items 1 to 3.

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