JP2017074853A - Vehicular seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance restraining performance and wearing property by a seat belt device while suppressing an increase in weight in a vehicular seat including a lifter.SOLUTION: A vehicular seat 1 includes: a seat cushion 2; a lifter 4 which supports the seat cushion 2 to be lifted and lowered; a seat belt device 5 which includes a buckle 22 mounted on one cushion side frame 10, an anchor 23 arranged on the other cushion side frame side and mounted on a base frame 12 of the lifter 4, and a webbing 20 bridged between the buckle 22 and the anchor 23 on a seating surface side of the seat cushion; and a tension transmission member 6 which has one end connected to an anchor side end of the webbing 20 and the other end fixed to the buckle 22 by passing a bottom surface side of the seat cushion 2. The buckle 22 is pulled by the tension transmission member 6 in a direction opposite to a tensile direction of the buckle 22 by the webbing 20 with loading of a tensile load on the webbing 20.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle seat.

  As a vehicle seat, for example, a seat provided with a lifter that supports a seat cushion so as to be movable up and down is known in order to adjust the height position of a seat surface from a vehicle floor on which the seat is installed. In a vehicle seat provided with a lifter, a buckle and an anchor that fasten both ends of a lap belt of a seat belt device are typically attached to a base frame of a lifter supported on a vehicle floor (for example, Patent Document 1). reference)

JP 2010-285029 A

  In a vehicle seat equipped with a lifter, when the buckle is attached to the base frame of the lifter, the buckle does not follow the raising and lowering of the seat cushion, and the relationship between the seated person and the seat belt device is broken, and the restraint by the seat belt device There was a risk that the performance would decrease. Further, as the seat cushion is raised, the position of the buckle is relatively lowered, and there is a possibility that the seat belt device that needs to be coupled to the buckle and the tongue plate may be deteriorated.

  By attaching the buckle to the cushion side frame of the seat cushion and raising and lowering the buckle integrally with the seat cushion, it is possible to eliminate the deterioration of the seat belt device. However, the cushion side frame of the seat cushion that is lifted and lowered is formed to be relatively light, and is usually inferior in strength to the base frame. Therefore, when the buckle is attached to the cushion side frame, there is a concern that the restraint performance will decrease due to insufficient strength of the cushion side frame, and if the cushion side frame is reinforced to ensure restraint performance, the weight of the seat cushion will increase. Is concerned.

  The present invention has been made in view of the above-described circumstances, and in a vehicle seat including a lifter that supports a seat cushion so that the seat cushion can be raised and lowered, restraint performance by the seat belt device and mounting of the seat belt device while suppressing an increase in weight. The purpose is to improve sex.

  A vehicle seat according to an aspect of the present invention includes a seat cushion having a pair of cushion side frames arranged at intervals in the seat width direction, and a base frame supported by the vehicle floor, and moves up and down the seat cushion. A lifter that can be supported, a buckle attached to one of the cushion side frames, an anchor disposed on the other side of the cushion side frame and attached to the base frame, and the seat cushion on the seat surface side. A seatbelt device including a webbing bridged between a buckle and the anchor, and one end is connected to an anchor side end of the webbing, and the other end passes through the bottom surface side of the seat cushion. The cushion side frame fixed to the buckle or attached to the buckle A tension transmitting member that is fixed, and the buckle or the cushion side frame to which the tension transmitting member is fixed has a tension direction of the buckle by the webbing as a tensile load is applied to the webbing. Is pulled in the opposite direction by the tension transmitting member.

  ADVANTAGE OF THE INVENTION According to this invention, the restraint performance by a seatbelt apparatus and the mounting | wearing property of a seatbelt apparatus can be improved in the vehicle seat provided with the lifter which supports a seat cushion so that raising / lowering is possible, suppressing a weight increase.

It is a perspective view of an example of a vehicular seat for explaining an embodiment of the present invention. It is a schematic diagram which shows operation | movement of the vehicle seat of FIG. It is a schematic diagram which shows the example of a connection with the webbing and tension | tensile_strength transmission member of the vehicle seat of FIG. It is a schematic diagram which shows the tensile load which acts on the webbing and tension | tensile_strength transmission member of the vehicle seat of FIG. It is a schematic diagram which shows the load which acts on the buckle of the vehicle seat of FIG. It is a schematic diagram which shows the other example of fixation of the buckle side edge part of the tension | tensile_strength transmission member of the vehicle seat of FIG. It is a schematic diagram which shows the other example of fixation of the buckle side edge part of the tension | tensile_strength transmission member of the vehicle seat of FIG. It is a schematic diagram of the modification of the vehicle seat of FIG. It is a schematic diagram of the other modification of the vehicle seat of FIG. It is a schematic diagram of the other modification of the vehicle seat of FIG. It is a schematic diagram of the other example of the vehicle seat for demonstrating embodiment of this invention. It is a schematic diagram of the modification of the vehicle seat of FIG.

  FIG.1 and FIG.2 shows an example of the vehicle seat for describing embodiment of this invention.

  A vehicle seat 1 shown in FIGS. 1 and 2 is a seat mounted on a vehicle such as an automobile, and includes a seat cushion 2 that constitutes a seat surface portion, a seat back 3 that constitutes a backrest portion, and a seat cushion 2. The lifter 4, the seat belt device 5, and the tension transmission member 6 are supported.

  The seat cushion 2 has a pair of cushion side frames 10 that are arranged at intervals in the seat width direction. The seat back 3 also has a pair of back side frames 11 arranged at intervals in the seat width direction. The lower end portion of the back side frame 11 is connected to the rear end portion of the cushion side frame 10.

  The lifter 4 has a base frame 12 supported on the vehicle floor. The base frame 12 is supported on the vehicle floor so as to be movable in the front-rear direction of the seat via, for example, a slide rail and a slider, or is fixedly supported on the vehicle floor.

  In the illustrated example, the lifter 4 includes a front arm 13 that connects the front end of the cushion side frame 10 and the front end of the base frame 12, and the rear end of the cushion side frame 10 and the base frame 12. It further has a rear arm 14 connecting the rear end. The front arm 13 and the rear arm 14 are rotatable with respect to the cushion side frame 10 and the base frame 12, respectively, and the cushion side frame 10 moves up and down with the rotation of the front arm 13 and the rear arm 14. As a result, the seat cushion 2 is raised and lowered. The configuration of the lifter 4 is not limited to the configuration of the illustrated example as long as the seat cushion 2 is supported so as to be able to be raised and lowered.

  The seat belt device 5 includes a webbing 20, a retractor 21, a buckle 22, and an anchor 23.

  The retractor 21 is attached to a vehicle frame near the seat back 3 or attached to the back side frame 11 inside the seat back 3. The buckle 22 is disposed on one side of the seat cushion 2 and is attached to the cushion side frame 10. The anchor 23 is disposed on the other side of the seat cushion 2 and attached to the base frame 12 of the lifter 4.

  The webbing 20 is provided with a tongue plate 24 detachably coupled to the buckle 22. The webbing 20 is spanned between the buckle 22 and the anchor 23 on the seating surface side of the seat cushion 2 by the tongue plate 24 being coupled to the buckle 22, and the buckle 22 on the backrest side of the seatback 3. And the retractor 21.

  The tension transmission member 6 is, for example, a belt-like member that is the same as the webbing 20 of the seat belt device 5, but the material and shape are not particularly limited as long as the tension can be transmitted. One end of the tension transmission member 6 is connected to the anchor side end of the webbing 20 that is spanned between the buckle 22 and the anchor 23 on the seating surface side of the seat cushion 2. The other end of the tension transmitting member 6 is fixed to the buckle 22 through the bottom surface side of the seat cushion 2.

  FIG. 3 shows a connection example between the webbing 20 and the tension transmission member 6.

  In the example shown in FIG. 3, the anchor 23 has a guide hole 30 through which the webbing 20 is movably inserted, and the webbing 20 and the tension transmission member 6 are continuously formed through the guide hole 30.

  The base frame 12 is provided with a first guide member 31 on which the tension transmission member 6 can slide. The first guide member 31 is disposed below the height position from the vehicle floor of the bottom surface of the seat cushion 2 when the seat cushion 2 is lowered most, and the tension transmission member 6 is moved by the first guide member 31. It is disposed below the bottom surface of the seat cushion 2.

  In addition, when the height position from the vehicle floor of the bottom surface of the seat cushion 2 when the seat cushion 2 is lowered most is higher than the height position of the anchor 23 from the vehicle floor, the first guide member 31. May be omitted.

  FIG. 4 shows a tensile load acting on the webbing 20 and the tension transmitting member 6, and FIG. 5 shows a load acting on the buckle 22.

  For example, a tensile load is applied to the webbing 20 that restrains the occupant to the seat cushion 2 and the seat back 3 when the vehicle collides. The load applied to the webbing 20 acts on the buckle 22 connected to the tongue plate 24, and the buckle 22 is pulled upward.

  Further, in the present example in which the webbing 20 and the tension transmission member 6 are continuously formed, the slackness of the tension transmission member 6 is removed by winding the extra length of the webbing 20 by the retractor 21. Therefore, the load applied to the webbing 20 also acts on the tension transmission member 6 and acts on the buckle 22 via the tension transmission member 6. Thereby, the buckle 22 is pulled downward by the tension transmitting member 6, that is, in a direction opposite to the pulling direction by the webbing 20.

  By pulling the buckle 22 in the opposite direction by the webbing 20 and the tension transmission member 6, the load applied to the cushion side frame 10 to which the buckle 22 is attached is reduced. Thereby, when attaching the buckle 22 to the cushion side frame 10, the reinforcement of the cushion side frame 10 is unnecessary or minimized, and an increase in the weight of the vehicle seat 1 can be suppressed.

  The buckle 22 is attached to the cushion side frame 10 so that the buckle 22 is raised and lowered integrally with the seat cushion 2. Accordingly, regardless of whether the seat cushion 2 is raised or lowered, the restraint performance by the seat belt device 5 can be enhanced while maintaining the relationship between the seated person and the seat belt device 5, and the seat belt device 5 can be easily worn. Can do.

  6 and 7 show another example of fixing the buckle side end portion of the tension transmitting member 6.

  The buckle side end of the tension transmission member 6 has been described as being fixed to the buckle 22, but the buckle side end of the tension transmission member 6 may be fixed to the cushion side frame 10 to which the buckle 22 is attached. Good.

  In the example shown in FIG. 6, the buckle side end portion of the tension transmitting member 6 is overlapped with the attachment portion 25 of the buckle 22 attached to the cushion side frame 10 and fixed to the cushion side frame 10 integrally with the attachment portion 25 of the buckle 22. It is a thing. In the example shown in FIG. 7, the buckle side end portion of the tension transmitting member 6 is fixed to the cushion side frame 10 in the vicinity of the attachment portion 25 of the buckle 22 and separately from the attachment portion 25 of the buckle 22.

  When a tensile load is applied to the webbing 20, an upward load is applied to the cushion side frame 10 via the buckle 22, and a downward load is applied to the cushion side frame 10 via the tension transmission member 6. The load applied to the cushion side frame 10 is reduced by offsetting each other.

  From the viewpoint of avoiding buckling due to the compression of the cushion side frame 10, the tension transmitting member 6 that applies a downward load to the cushion side frame 10 is preferably fixed upward on the cushion side frame 10. It is set below the fixed location of the attachment part 25 of the buckle 22 which loads the load.

  8 to 10 show modified examples of the vehicle seat 1 described above.

  A modified example of the vehicle seat 1 described below is activated when a collision is detected by a vehicle collision detection sensor or when an acceleration greater than or equal to a predetermined value acts on the vehicle, for example, A pretensioner for applying a tensile load to the webbing 20 and the tension transmission member 6 is further provided.

  The example shown in FIG. 8 includes a buckle pretensioner 40 that pulls the buckle 22 toward the base frame 12 (vehicle floor). When the buckle pretensioner 40 is operated and the buckle 22 is pulled, the webbing 20 is pulled, and the restraining performance of the seat belt device 5 is increased. Furthermore, the tension transmission member 6 that is configured in a continuous manner with the webbing 20 is also pulled, and the slackness of the tension transmission member 6 is more reliably removed.

  The example shown in FIG. 9 includes a retractor pretensioner 41 that pulls the webbing 20 into the retractor 21. When the retractor pretensioner 41 is operated and the webbing 20 is drawn into the retractor 21, the restraint performance by the seat belt device 5 is enhanced. Furthermore, the tension transmission member 6 that is configured in a continuous manner with the webbing 20 is also pulled, and the slackness of the tension transmission member 6 is more reliably removed.

  The example shown in FIG. 10 includes a lap pretensioner 42 that pulls the anchor 23 toward the base frame 12 (vehicle floor), and pulls the webbing 20 in the same manner as the examples shown in FIGS. The restraining performance due to the tension is improved, and the tension transmitting member 6 is more securely removed by pulling the tension transmitting member 6.

  In order to pull the tension transmission member 6 by retracting the anchor 23, the base frame 12 is provided with a second guide member 32 on which the tension transmission member 6 can slide. The second guide member 32 is disposed at a height position higher than the anchor 23 from the vehicle floor, and the tension transmitting member 6 passes through the second guide member 32 and the first guide member 31 in this order from the anchor 23 to the buckle 22. Or the cushion side frame 10 to which the buckle 22 is attached.

  If the height position of the bottom surface of the seat cushion 2 from the vehicle floor when the seat cushion 2 is lowered most is higher than the height position of the second guide member 32 from the vehicle floor, the first guide The member 31 may be omitted.

  When the lap pretensioner 42 is operated and the anchor 23 is pulled, the webbing 20 is pulled, and the restraining performance of the seat belt device 5 is enhanced. Furthermore, the tension transmission member 6 that is configured in a continuous manner with the webbing 20 is also pulled, and the slackness of the tension transmission member 6 is more reliably removed.

  The buckle pretensioner 40, the retractor pretensioner 41, and the lap pretensioner 42 may be used singly or in combination.

  FIG. 11 shows another example of a vehicle seat for explaining an embodiment of the present invention.

  In the vehicle seat 1 described above, the webbing 20 and the tension transmission member 6 are continuously formed through the guide hole 30 of the anchor 23, whereas in the vehicle seat 101 shown in FIG. The end is fixed to the anchor 23, the anchor-side end of the tension transmission member 6 is also fixed to the anchor 23, and the webbing 20 and the tension transmission member 6 are connected via the anchor 23. The buckle side end of the tension transmitting member 6 is fixed to the buckle 22 in the same manner as the vehicle seat 1 described above.

  The tension transmitting member 6 having one end fixed to the buckle 22 and the other end fixed to the anchor 23 is slackened as the seat cushion 2 is raised and lowered. In order to remove the slack generated in the tension transmission member 6, the vehicle seat 101 includes a wrap pretensioner 42 that pulls the anchor 23 toward the base frame 12 (vehicle floor), and the tension transmission member 6 slides on the base frame 12. A movable first guide member 31 and a second guide member 32 are provided.

  The first guide member 31 is disposed below the height position from the vehicle floor of the bottom surface of the seat cushion 2 when the seat cushion 2 is lowered most, and the second guide member 32 is a vehicle of the anchor 23. The tension transmission member 6 is fixed to the buckle 22 through the anchor 23, the second guide member 32, and the first guide member 31 in this order.

  If the height position of the bottom surface of the seat cushion 2 from the vehicle floor when the seat cushion 2 is lowered most is higher than the height position of the second guide member 32 from the vehicle floor, the first guide The member 31 may be omitted.

  For example, when a collision is detected by a collision detection sensor of the vehicle, or when an acceleration of a predetermined value or more acts on the vehicle, the lap pretensioner 42 is operated and the anchor 23 is pulled. By pulling the anchor 23, the tension transmission member 6 is pulled, and the slack of the tension transmission member 6 is removed before the load is applied to the webbing 20.

  The load applied to the webbing 20 acts on the buckle 22 coupled to the tongue plate 24, and the buckle 22 is pulled upward, but the slack of the tension transmission member 6 is removed, and the buckle 22 transmits the tension. It is retained by the member 6. That is, the buckle 22 is pulled downward by the tension transmitting member 6, that is, in the direction opposite to the pulling direction by the webbing 20.

  By pulling the buckle 22 in the opposite direction by the webbing 20 and the tension transmission member 6, the load applied to the cushion side frame 10 to which the buckle 22 is attached is reduced. Thereby, when attaching the buckle 22 to the cushion side frame 10, reinforcement of the cushion side frame 10 is unnecessary or minimized, and an increase in the weight of the vehicle seat 101 can be suppressed.

  The buckle 22 is attached to the cushion side frame 10 so that the buckle 22 is raised and lowered integrally with the seat cushion 2. Accordingly, regardless of whether the seat cushion 2 is raised or lowered, the restraint performance by the seat belt device 5 can be enhanced while maintaining the relationship between the seated person and the seat belt device 5, and the seat belt device 5 can be easily worn. Can do.

  In the example shown in FIG. 11, the webbing 20 and the tension transmission member 6 are fixed to the anchor 23, and the webbing 20 and the tension transmission member 6 are connected via the anchor 23. 12, the tension transmission member 6 may be directly connected to the anchor side end of the webbing 20 fixed to the anchor 23.

  Also in the vehicle seat 101, the buckle side end of the tension transmission member 6 may be fixed to the cushion side frame 10 to which the buckle 22 is attached, as shown in FIGS. 6 and 7.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat cushion 2 Seat cushion 3 Seat back 4 Lifter 5 Seat belt device 6 Tension transmission member 10 Cushion side frame 12 Base frame 20 Webbing 21 Retractor 22 Buckle 23 Anchor 30 Guide hole 40 Buckle pretensioner 41 Retractor pretensioner 42 Wrap pretensioner

Claims (5)

A seat cushion having a pair of cushion side frames arranged at intervals in the seat width direction;
A lifter that has a base frame supported on the vehicle floor and supports the seat cushion so as to be movable up and down;
A buckle attached to one of the cushion side frames;
An anchor disposed on the other cushion side frame side and attached to the base frame;
A seat belt device including a webbing spanned between the buckle and the anchor on the seating surface side of the seat cushion;
One end is connected to the anchor side end of the webbing, and the other end is fixed to the buckle through the bottom surface side of the seat cushion or fixed to the cushion side frame to which the buckle is attached. A tension transmission member;
With
The buckle or the cushion side frame to which the tension transmitting member is fixed is pulled by the tension transmitting member in a direction opposite to the pulling direction of the buckle by the webbing as a tensile load is applied to the webbing. Vehicle seat. The vehicle seat according to claim 1,
The anchor has a guide hole through which the webbing is movably inserted,
The tension transmission member and the webbing are vehicle seats configured in a continuous manner through the guide hole of the anchor. The vehicle seat according to claim 2,
The seat belt device further includes a retractor that winds up the webbing. The vehicle seat according to claim 2 or 3,
A vehicle seat, further comprising a pretensioner that is actuated when a collision is detected by a vehicle collision detection sensor or when an acceleration greater than or equal to a predetermined value acts on the vehicle and applies a tensile load to the webbing and the tension transmission member. The vehicle seat according to claim 1,
An anchor side end of the webbing is fixed to the anchor,
The end of the tension transmitting member connected to the anchor side end of the webbing is directly connected to the anchor side end of the webbing, or is connected via the anchor,
A pretensioner that is actuated when a collision is detected by a collision detection sensor of a vehicle or when an acceleration of a predetermined value or more is applied to the vehicle, and applies a tensile load to the webbing and the tension transmission member by moving the anchor. A vehicle seat further comprising:

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