JP2006298091A - Vehicular seat apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular seat apparatus capable of preventing an increase in a load working on a webbing guide caused by a tension applied to a webbing and capable of securing a guidance function of the webbing guide even when a seat is reclined toward the front of a vehicle upon a frontal collision or a hard deceleration of the vehicle. <P>SOLUTION: This vehicular seat apparatus is provided, in the vehicle, with a seat back 3 so as to be at least reclined toward the front of the vehicle upon the frontal collision or the hard deceleration. The vehicular seat apparatus is secured onto a seat back frame 16 provided inside the seat back 3 to support the webbing guide 6. Furthermore, the vehicular seat apparatus is provided with a webbing guide supporting portion 8 which is deformably constructed so as to shift the webbing guide 6 downward by a tension applied to the webbing upon the frontal collision or the hard deceleration. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle seat device including a belt guide for guiding a webbing, and more particularly to a structure configured to reduce a load acting on a belt guide due to a webbing tension at the time of a frontal collision or sudden deceleration of a vehicle.

  Conventionally, in a two-seater type vehicle such as a sports car, a seat belt retractor for winding and unwinding the webbing is provided inside the trim member at the rear of the seat, and the webbing is made from the opening at the upper end of the trim member. Withdrawn. In this case, when the occupant sits down and wears the webbing, he must reach out to the rear opening and grasp the webbing, which is inconvenient when wearing the webbing. A belt guide for holding the webbing is provided in the region, in the vicinity of the shoulder portion of the occupant.

  Patent Document 1 discloses a vehicle seat belt guide that is made of a synthetic resin and is substantially L-shaped when viewed from the front, and the seat belt guide is disposed at the upper end of the seat back and at one side of the headrest. A receiving surface for receiving the webbing is formed on the guide part of the seat belt guide, and a holding part for hooking the outer edge part of the webbing is formed on the outer edge part of the receiving surface, so that the webbing is easily gripped by the seat belt guide. Is held in.

Patent Document 2 discloses a seat load measuring device. When this seat load measuring device is provided on a seat cushion of a vehicle, the seat is inclined forward as a whole at the time of frontal collision or sudden deceleration of the vehicle.
Japanese Patent Laid-Open No. 11-301404 Japanese Patent Laid-Open No. 2004-2054889

  When the seat load measuring device of Patent Document 2, for example, is applied to a vehicle seat seat device provided with a belt guide as in Patent Document 1, the seat tilts forward as a whole at the time of a front collision or sudden deceleration, and the seat As the back tilts forward, the belt guide moves upward and forward, so that the webbing is largely bent before and after the belt guide. Therefore, a large downward load is applied to the belt guide due to the tension acting on the webbing, and the belt guide may not function normally due to the load, so that the restraint of the occupant at the belt guide portion is ensured. It is desirable.

  The object of the present invention is to prevent an increase in the load acting on the belt guide due to the tension acting on the webbing even when the seat is tilted forward at the time of frontal collision or sudden deceleration of the vehicle. Is to secure.

  The vehicle seat device according to claim 1 includes a seat having a seat cushion and a seat back, a webbing that is pulled out from an opening of a trim member provided behind the seat and restrains an occupant, and a vehicle in the vehicle width direction of the seat back. In a vehicle seat device including a belt guide disposed on the outer side so as to be positioned in the vicinity of an occupant's shoulder and guiding the webbing to a position where the webbing can be easily pulled out, at least the seat back is subjected to a forward collision or a sudden deceleration. Sometimes it is provided in the vehicle to incline forward of the vehicle, is fixed to the seat back frame provided inside the seat back and supports the belt guide, and the belt by the tension acting on the webbing at the time of front collision or sudden deceleration A belt guide support portion configured to be deformable so as to move the guide downward is provided.

  At least the seat back is provided in the vehicle so as to incline forward at the time of a front collision or sudden deceleration, and is fixed to a seat back frame provided inside the seat back to support the belt guide. Since the belt guide support part is configured to be deformable so that the belt guide can be moved downward by the tension acting on the webbing during sudden deceleration, the seat back tilts forward when the vehicle is bumped forward or suddenly decelerates. When the upper end moves upward and forward, and a large downward load is applied to the belt guide due to the tension acting on the webbing, the load is absorbed by the deformation of the belt guide support part, and the load acts on the belt guide. Can be reduced, the belt guide can be prevented from being damaged, its function can be secured, and the occupant's restraint can be prevented from deteriorating. Door can be.

  According to a second aspect of the present invention, there is provided the vehicle seat device according to the first aspect, wherein the seat cushion detects the load via a deformable portion that can be deformed in the vertical direction by the load of an occupant seated on the seat. The seat is configured to swing around the front end portion of the seat cushion at the time of a front collision or sudden deceleration.

  According to a third aspect of the present invention, there is provided the vehicle seat device according to the first aspect, wherein the belt guide is bent at an angle of 150 ° or less before and after the belt guide when viewed from the vehicle width direction at the time of front collision or sudden deceleration. It is characterized by being provided.

  According to a fourth aspect of the present invention, there is provided the vehicle seat device according to the first aspect, wherein the belt guide has a slit through which the webbing is inserted, and the slit is substantially horizontal in the width direction of the webbing when the occupant is restrained by the webbing. It was formed as follows.

  According to the first aspect of the present invention, at least the seat back is provided in the vehicle so as to be inclined forward of the vehicle at the time of a front collision or sudden deceleration, and is fixed to the seat back frame to support the belt guide, and at the time of the front collision. Alternatively, the belt guide support portion is provided so that it can be deformed so that the belt guide is moved downward by the tension acting on the webbing during sudden deceleration, so that the upper end of the seat back is moved upward and forward during a forward collision or sudden deceleration. When a large downward load is applied to the belt guide due to the tension that moves and acts on the webbing, the load is absorbed by the deformation of the belt guide support part and the load acting on the belt guide is reduced. It is possible to prevent the guide function from being lowered due to the breakage of the guide and the like, and it is possible to prevent the occupant's restraint from being lowered. In addition, since the belt guide and the belt guide support portion are not reinforced, the deterioration of the guide function such as breakage of the belt guide can be prevented, so that the weight of the belt guide and the belt guide support portion does not increase.

  According to the invention of claim 2, the seat cushion is provided with load detecting means for detecting the load via the deformable portion that can be deformed in the vertical direction by the load of the occupant seated on the seat. Since the seat cushion is configured to swing around the front end portion of the seat cushion at the time or sudden deceleration, the belt guide moves forward and upward together with the upper end portion of the seed back at the time of front collision or sudden deceleration of the vehicle. For this reason, the webbing is greatly bent and a large downward load acts on the belt guide, but even in this case, the guide function can be prevented from being lowered.

  According to the invention of claim 3, the belt guide is provided so that the webbing is bent at an angle of 150 ° or less before and after the belt guide when viewed from the vehicle width direction at the time of a front collision or sudden deceleration. In this case, the belt guide support can be deformed with high webbing tension, ensuring the guide function of the belt guide at the time of frontal collision or sudden deceleration of the vehicle, and further increasing the restraint force on the occupant. Property can be further improved.

  According to the invention of claim 4, the belt guide has a slit through which the webbing is inserted, and the slit is formed so that the width direction of the webbing is substantially horizontal when the passenger is restrained by the webbing. The belt guide is subjected to a large downward load from the webbing at the time of frontal collision or sudden deceleration of the vehicle, but even in this case, the belt guide is reliably prevented from being damaged. it can.

  A vehicle seat device according to the present invention includes a seat having a seat cushion and a seat back, a webbing that is pulled out from an opening of a trim member provided at the rear of the seat and restrains an occupant, and the seat back in the vehicle width direction outside the vehicle. In a vehicle seat device provided with a belt guide that is arranged on the side so as to be positioned in the vicinity of the shoulder portion of the occupant and guides the webbing to a position where the webbing can be easily pulled out, It is provided in the vehicle so as to incline forward, and is fixed to a seat back frame provided inside the seat back to support the belt guide, and the belt guide is moved downward by a tension acting on the webbing at the time of front collision or sudden deceleration. A belt guide support portion configured to be deformable so as to be moved is provided.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 and 2, the vehicle seat apparatus 1 is installed in a two-seater type automobile having a driver seat and a passenger seat. FIG. The seat device for the seat is not shown. FIG. 2 shows a vehicle seat device 1 on the driver's seat side, and a passenger seat device (not shown) is provided on the side of the driver's seat device.
Although the vehicle seat device 1 is applied to both a driver seat device and a passenger seat device, the driver seat device and the passenger seat device are configured symmetrically. Explanation is omitted for the passenger seat device. 1 will be described as “front / rear / left / right”.

  As shown in FIG. 2, the vehicle seat device 1 includes a seat 4 having a seat cushion 2 and a seat back 3, a webbing 5 for restraining an occupant, and a belt guide 6 for guiding the webbing to a position where the webbing can be easily pulled out. And a belt guide support portion 8 for supporting the belt guide. Inside the seat cushion 2, a load sensor 11 (load detection means) having a deformable portion 12 is provided. The load sensor 11 is configured to detect the load via the deformable portion 12 that can be deformed in the vertical direction based on the load (weight) of the occupant seated on the seat 4. When a collision load is applied from the front of the vehicle or a large inertial force is applied to the front of the vehicle, the seat cushion 2 swings around a predetermined portion from the vehicle longitudinal direction center to the front end, and the seat The whole of 4 tilts forward.

As shown in FIG. 1 and FIG. 2, a trim member 13 that covers the surface of the vehicle body panel is provided behind the seat back 3, and the webbing 5 is wound up and fed out to a lower portion inside the trim member 13. A seat belt retractor 14 is provided. An opening 15 for leading the webbing 5 to the outside is provided on the vehicle outer side of the upper end portion of the trim member 13.
A belt guide 6 is provided at a portion of the upper end portion of the seat back 3 (the upper end portion of the portion excluding the headrest 3a) on the vehicle outer side in the vehicle width direction and in the vicinity of the shoulder portion of the occupant. The opening 15 is positioned substantially directly behind the belt guide 6, and the webbing 5 is 150 ° or less before and after the belt guide 6 when viewed from the vehicle width direction when the front back is tilted or suddenly decelerates. It is provided at a position that bends at an angle.

Next, the belt guide 6 will be described.
As shown in FIGS. 3 to 5, the belt guide 6 is made of a synthetic resin material such as polypropylene. The belt guide 6 is formed in a substantially L shape in a side view by a base portion 6a forming a lower end portion and a guide plate portion 6b rising integrally from the base portion 6a. A curved slit 7 for inserting the webbing 5 is formed in the guide plate portion 6b of the belt guide 6. The slit width of the slit 7 in the webbing thickness direction facilitates the feeding and winding of the webbing 5. The webbing 5 is formed to have a size larger than the thickness of the webbing 5.

  The slit 7 has a substantially vertical standing slit portion 7a, a curved slit portion 7b connected to the lower end of the vertical slit portion 7a, and an inclined slit portion 7c that is connected to the curved slit portion 7b and gently inclined upward. The vertical slit portion 7 a is formed in the inner portion of the belt guide 6. An introduction port 7e for introducing the webbing 5 into the slit 7 is formed at a position slightly below the upper end of the vertical slit portion 7a. The width of the introduction port 7e in the webbing thickness direction is equal to the thickness of the webbing 5. They are formed with substantially the same dimensions. Therefore, it is difficult for the webbing 5 to come out of the belt guide 6.

The central part 7d of the slit 7 (a part of the inclined slit part 7c and a part of the curved slit part 7b) is substantially in the width direction of the webbing 5 drawn out from the opening part 15 in the restrained state of the passenger wearing the webbing 5. The webbing 5 is formed so as to be horizontal so as to be horizontal.
Since the inclined slit portion 7c of the slit 7 is gently inclined inward and downward, even when the occupant removes the webbing 5, the webbing 5 is not released from the belt guide 6 toward the outside of the vehicle. Since it returns to the central portion 7d of the slit 7, it is possible to wind up smoothly.

  A recess 6d is formed on the front side of the upper end portion of the guide plate portion 6b, and similarly, a recess 6e is formed on the rear side of the upper end portion of the guide plate portion 6b. It is. As shown in FIGS. 4 and 5, the base portion 6a of the belt guide 6 protrudes rearward, and the base portion 6a is supported by the belt guide by two bolts 9 and a washer 10 screwed into the bolt holes 6c. It is fixed to the part 8.

Next, the belt guide support portion 8 will be described.
As shown in FIGS. 3 and 5, the belt guide support portion 8 is formed of a metal plate (for example, steel) with an appropriate thickness (for example, 1.0 to 2.0 mm) in a front view. It has a structure bent in a gate shape, and has two leg portions 8a and an upper surface plate 8b connecting the upper ends thereof.
The two leg portions 8a of the belt guide support portion 8 are fixed to a hollow seat back frame 16 provided inside the seat back 3 by welding. Since the two leg portions 8a are arranged vertically and are fixed to the outer downward inclined portion of the seat back frame 16, the upper surface plate 8b of the belt guide support portion 8 is inclined outward.

Two holes 8c corresponding to the two bolt holes 6c are formed in the upper surface plate 8b of the belt guide support portion 8, and the belt guide 6 is placed and positioned on the upper surface plate 8b of the belt guide support portion 8, The belt guide 6 is fixed to the belt guide support portion 8 by inserting bolts 9 into the two holes 8c from above the upper surface plate 8b and screwing them into the two bolt holes 6c.
When a large downward load is applied to the belt guide 6 due to the tension applied to the webbing 5 at the time of frontal collision or sudden deceleration of the automobile, the leg portion 8a is elastically deformed or plastically deformed, and the belt guide 6 moves downward. The bell guide 6 is prevented from being damaged, and the guide function of the bell guide 6 is ensured.

Next, the operation and effect of the vehicle seat device 1 described above will be described.
At the time of frontal collision or sudden deceleration of the vehicle, as shown by a two-dot chain line in FIG. 6, the seat 4 swings forward about the front portion of the seat cushion 2, so that the belt guide 6 is moved from the normal position. Move forward and upward. At this time, the webbing 5 is bent at an angle of 150 ° or less before and after the belt guide 6 as viewed from the vehicle width direction, and a large load is applied downward to the belt guide 6 due to the tension of the webbing 5. Then, as shown by a two-dot chain line in FIG. 5, the leg portion 8a of the belt guide support portion 8 is deformed by the load, and the belt guide 6 moves downward accordingly.

  Thus, the seat 4 tilts forward about the front portion of the seat cushion 2 at the time of a front collision or sudden deceleration, and the belt guide 6 moves forward and obliquely upward. For this reason, the webbing 5 is bent more and a large load acts on the belt guide 6. However, since the belt guide support portion 8 is configured to be deformable so that the belt guide 6 is moved downward by the tension acting on the webbing 5 at the time of frontal collision or sudden deceleration of the automobile, Since the belt guide support portion 8 is deformed, the load acting on the belt guide 6 due to the tension of the webbing 5 can be reduced, the belt guide 6 is prevented from being damaged, and the guide function of the belt guide 6 is ensured. It is possible to prevent the occupant's restraint from being lowered. In addition, since it is not necessary to reinforce the belt guide 6 and the belt guide support portion 8, the weight of the seat device 1 does not increase.

  Furthermore, the seat cushion 2 is provided with a load sensor 11 that detects the load via a deformable portion 12 that can be deformed in the vertical direction by the load of an occupant seated on the seat 4. The belt guide 6 is moved forward and upward together with the upper end portion of the seed back 3 at the time of frontal collision or sudden deceleration of the automobile because it is configured to swing around the front portion of the seat cushion 2 at the time of deceleration. For this reason, the webbing 5 is bent more and a large downward load acts on the belt guide 6. Even in this case, it is possible to prevent the guide function from being lowered.

  Furthermore, the belt guide 6 is provided so that the webbing 5 bends at an angle of 150 ° or less before and after the belt guide 6 when viewed from the vehicle width direction at the time of a front collision or sudden deceleration. Therefore, the deformation of the belt guide support portion 8 is promoted, the guide function of the belt guide 6 is ensured at the time of frontal collision or sudden deceleration of the automobile, the restraining force on the occupant can be further increased, and the occupant's safety is further increased Can be improved.

  Further, the belt guide 6 has a slit 7 through which the webbing 5 is inserted. The slit 7 is formed so that the width direction of the webbing 5 is substantially horizontal when the passenger is restrained by the webbing 5. The belt guide 6 can be restrained without giving a sense of incongruity, and a large downward load is applied to the belt guide 6 from the webbing 5 at the time of frontal collision or sudden deceleration of the vehicle. Can be prevented.

Next, a modified example in which the above embodiment is partially modified will be described.
1] If a laterally U-shaped deformation promoting portion 8d that promotes downward deformation with respect to a load from above is formed on the leg portion 8a of the belt guide support portion 8A as shown in FIG. The downward deformation at the time of a collision or sudden deceleration can be promoted. In addition, as a deformation | transformation acceleration | stimulation part 8d, the thing of various structures other than what is shown in FIG. 7 is employable.

2] The vehicle seat device 1 of the present invention may be applied only to the driver seat device or only to the passenger seat device.
3) The belt guide support portion 8 only needs to be configured so as to be deformed by the tension acting on the webbing 5 at the time of frontal collision or sudden deceleration of the automobile, and the leg portion 8a is configured to be inclined with respect to the vertical posture. May be.
4] In addition, those skilled in the art can implement the present invention in various forms with various modifications, and the present invention includes such various modified forms.

1 is a perspective view of an interior of an automobile according to an embodiment of the present invention. It is a side view of a vehicle seat device. It is a perspective view of a belt guide and a belt guide support part. It is IV arrow line view of FIG. FIG. 5 is a view taken in the direction of arrow V in FIG. 4. It is a side view of the vehicular seat device at the time of front collision or sudden deceleration. FIG. 9 is a diagram corresponding to FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle seat apparatus 2 Seat cushion 3 Seat back 4 Seat 5 Webbing 6 Belt guide 7 Slit 8 Belt guide support part 11 Load sensor 12 Deformation part 13 Trim member 15 Opening part 16 Seat back frame

Claims (4)

A seat having a seat cushion and a seat back; a webbing that is pulled out from an opening of a trim member provided at the rear of the seat to restrain the occupant; and the vicinity of the shoulder of the occupant on the vehicle lateral side of the seat back in the vehicle width direction A vehicle seat device comprising: a belt guide arranged to be positioned at a position and guiding a webbing to a position where the webbing is easily pulled out;
At least the seat back is provided in the vehicle so as to tilt forward of the vehicle at the time of a front collision or sudden deceleration,
The belt guide is fixed to a seat back frame provided inside the seat back so as to support the belt guide, and the belt guide can be deformed to be moved downward by a tension acting on the webbing at the time of a front collision or sudden deceleration. A vehicle seat device comprising a belt guide support portion. The seat cushion is provided with a load detection means for detecting the load via a deformable portion that can be deformed in the vertical direction by the load of an occupant seated on the seat,
The vehicle seat device according to claim 1, wherein the seat is configured to swing around the front end portion of the seat cushion at the time of a front collision or a sudden deceleration.   The belt guide is provided so that the webbing is bent at an angle of 150 ° or less before and after the belt guide when viewed from the vehicle width direction at the time of a front collision or sudden deceleration. Vehicle seat device.   2. The belt guide according to claim 1, wherein the belt guide has a slit through which the webbing is inserted, and the slit is formed so that the width direction of the webbing is substantially horizontal when the occupant is restrained by the webbing. Vehicle seat device.

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