JP5766510B2 - Vehicle seat device - Google Patents

Description

  The present invention relates to a vehicle seat device, and more particularly, to a vehicle seat device that can be adjusted in position by sliding in the front-rear direction.

  Vehicle seats such as driver's seats and passenger seats are usually installed on the vehicle body floor via slide rails so that the position in the front-rear direction can be adjusted. A seat belt device for restraining the human body is provided. This type of seat belt device is generally configured such that one end of the seat belt is wound around a winder called a retractor, and a metal fitting fixed to the other end is detachably attached to the buckle. In many cases, the retractor is provided on the vehicle body side, but in a so-called three-point belt-in seat in which a seat belt is built in the seat, it is provided on the seat side (Patent Document 1).

JP 2000-43628 A

  In the above-described seat belt device, when an overload is applied to the retractor from the seat belt to be unwound, the lock mechanism provided in the retractor is activated to lock out the seat belt, thereby preventing the passenger from jumping forward. Here, when the retractor is provided on the vehicle body side, the load applied to the seat belt is received by the vehicle body via the retractor, so the load on the seat is small.

  However, in the case of the above-described three-point belt-in seat in which the retractor is built in the seat, a large forward force is transmitted to the seat back via the seat belt, and the entire seat is tilted forward. For this reason, a large load is applied to the slide rail of the seat, and particularly when the seat is positioned forward and the slide rail is engaged with the fixed rail on the vehicle body floor side with a short length, the fixed rail There is a risk that the slide rail will peel off. This problem can be solved by improving the strength of the slide rail and the fixed rail, but in that case, a problem of increasing the weight occurs.

  Therefore, the present invention can reduce the load on the slide rail when the seat receives a forward tilting force, thereby preventing the slide rail from peeling without causing an increase in weight. An object of the present invention is to provide a sheet apparatus for use.

A vehicle seat device of the present invention includes a stand fixed to a vehicle body floor, a pair of left and right slide rails that are installed on the stand so as to be slidable in the front-rear direction, and whose front part projects forward from the stand when sliding forward, In a vehicle seat device comprising a base member that is fixed to the slide rail and supports a seat, the base member engages with the stand and the base member to restrict the forward movement of the base member. An engaging mechanism is provided on the inner side between the pair of left and right slide rails .

  According to the present invention, when the seat receives a forward tilting force, the base member is engaged with the stand by the engagement mechanism and the forward rotation of the base member is restricted, so that the seat is tilted forward on the slide rail. It becomes difficult to apply the force to do directly. For this reason, it is possible to reduce the load on the slide rail when the seat receives a forward tilting force.

  In this invention, the said engagement mechanism contains the form provided in the location corresponding to the rear part of the said base member in the state which the said slide rail slid ahead. According to this aspect, the forward rotation operation of the base member can be restricted with a relatively weak moment, and the strength and weight of the engagement mechanism can be suppressed.

  The specific configuration of the engagement mechanism of the present invention includes the following forms. That is, a hole extending in the front-rear direction is formed in the stand, and the base member is inserted through the hole from above, and the base member slides in the front-rear direction together with the slide rail in the front-rear direction. A reinforcing member that slides is provided, and the engaging mechanism includes a protruding portion that is formed on the reinforcing member and engages with the lower surfaces of the left and right peripheral portions of the hole, and the peripheral portion. To do. According to the engagement mechanism of such a form, the configuration is simple, and an advantage that an increase in weight and cost can be suppressed is obtained.

  According to the present invention, it is possible to reduce the load on the slide rail when the seat receives a forward tilting force, thereby preventing the slide rail from peeling without causing an increase in weight. There is an effect that a vehicle seat device is provided.

It is a perspective view at the time of seeing the vehicular seat device concerning one embodiment of the present invention from the lower part. It is a side view of the same apparatus. It is a rear view of the same device. It is the IV section enlarged view of FIG. It is VV sectional drawing of FIG. It is a sectional side view which shows the effect | action which a reinforcement board engages with a stand and suppresses the forward inclination of a sheet | seat.

  Hereinafter, an embodiment of a vehicle seat device according to the present invention will be described with reference to the drawings.

(1) Basic Configuration FIG. 1 is a perspective view of the entire sheet apparatus 1 according to an embodiment as viewed from below, FIG. 2 is a side view of the apparatus 1, and FIG. 3 is a rear view. The arrow F in FIGS. 1 and 2 indicates the front in the state of being incorporated in the vehicle, and the arrow R indicates the rear. In the following description, the front-rear direction, the left-right direction, and the vertical direction are based on these drawings. .

  The seat device 1 includes a stand 10 fixed to a vehicle body floor (not shown), a pair of left and right slide rails 20 slidably supported on the stand 10 and a suspension mechanism 30 on the slide rails 20. It is comprised from the sheet | seat not shown installed.

  The stand 10 is fixed to a rectangular stand plate 11 that is long in the front-rear direction, a bracket 12 that is fixed to the lower surface of the front end portion of the stand plate 11, and left and right end portions of the upper surface of the stand plate 11. The stand plate 11 is provided with a pair of left and right fixed rails 13 extending so that the stand plate 11 is in a horizontal state, and the stand plate 11 and the bracket 12 are fixed to the vehicle body floor.

  On the left and right fixed rails 13 of the stand 10, slide rails 20 extending in the front-rear direction are incorporated so as to be slidable in the front-rear direction along the fixed rails 13. A suspension mechanism 30 is installed on these slide rails 20.

  The suspension mechanism 30 includes upper and lower upper frames 31 and a lower frame 32 that are installed horizontally and parallel to each other, and a pair of left and right link mechanisms 33 that support the upper frame 31 so as to be movable up and down with respect to the lower frame 32.

  On the upper frame 31, a seat cushion for the seat is installed. As shown in FIG. 3, between the upper frame 31 and the lower frame 32, there is an air spring 34 that receives a load that the upper frame 31 receives from above via a seat cushion, and a hydraulic pressure that absorbs the vibration of the air spring 34. A cylinder type damper 35 is provided.

  The lower frame 32 includes a pair of left and right rail members 321 extending in the front-rear direction, and a pair of front and rear horizontal members 322 extending in the left-right direction connecting the front end portions and the rear end portions of the rail members 321. In the lower frame 32, the rail member 321 is fixed on the slide rail 20, so that the suspension mechanism 30 slides on the fixed rail 13 in the front-rear direction together with the slide rail 20. The position of the slide rail 20 in the front-rear direction is arbitrarily adjusted by a lock mechanism (not shown), so that the position of the seat in the front-rear direction can be adjusted.

  The upper frame 31 disposed in parallel above the lower frame 32 has the same configuration as the lower frame 32, and includes a pair of left and right rail members 311 extending in the front-rear direction, the front end portions of the rail members 311 and the rear end. And a pair of front and rear lateral members 312 extending in the left-right direction for connecting the parts.

  The pair of left and right link mechanisms 33 are formed of two link arms 331 and 332, that is, an intermediate portion between a link arm 331 inclined forward and a link arm 332 inclined forward and lowered in an X shape via a link shaft 333. Rarely, the link shaft 333 can be rotated relative to the fulcrum. The link mechanism 33 shares the link shaft 333. In other words, the two link arms 331 and 332 of the link mechanism 33 are rotatably supported at both ends of the single link shaft 333, respectively.

  As shown in FIG. 2, the link arm 331 on the front rising side in the left and right link mechanisms 33 rotates to the rear end portion of each rail member 321 of the lower frame 32 via a fixed shaft 331 </ b> A whose rear end portion extends in the left-right direction. In the same manner, the link arm 332 on the front lower side is rotatable to the rear end portion of each rail member 311 of the upper frame 31 via a fixed shaft 332A whose rear end portion extends in the left-right direction. It is supported. The fixed shaft 332A on the upper frame 31 side is spanned between the rear end portions of the pair of left and right rail members 311 and is rotatably supported by the rail members 311. The fixed shaft 331A on the lower frame 32 side is a pair of left and right rails 311. The rail member 321 is bridged around the rear end portion of the rail member 321 and is rotatably supported.

  On the other hand, the front end portions of the link arms 331 and 332 are supported to be movable in the front-rear direction along the rail members 311 and 321 of the upper frame 31 and the lower frame 32 via the movable shafts 331B and 332B, respectively. . The movable shaft 331B on the upper frame 31 side is spanned between the front end portions of the pair of left and right rail members 311 and supported so as to be movable in the front-rear direction along the rail members 311 via rolling rollers 335 mounted on both end portions. Has been. In addition, the movable shaft 332B on the lower frame 32 side is spanned between the front end portions of the pair of left and right rail members 321 and is movable in the front-rear direction along the rail members 321 via the rolling rollers 336 attached to both end portions. It is supported by.

  The left and right link mechanisms 33 expand and contract with the fixed shaft 331A on the lower frame 32 side as a fulcrum, and the upper frame 31 moves up and down with the expansion and contraction. That is, when the link arms 331 and 332 stand up so as to open, the link mechanism 33 extends upward and the upper frame 31 rises. Conversely, when the link arms 331 and 332 are folded so as to close, the link mechanism 33 moves downward. And the upper frame 31 is lowered. When the link mechanism 33 extends and the upper frame 31 moves up, the front end portions of the link arms 331 and 332 approach the rear fixed shafts 332A and 331A together with the movable shafts 331B and 332B, respectively, and contract to reduce the upper frame. When 31 is lowered, the front ends of the link arms 331 and 332 are separated from the fixed shafts 332A and 331A together with the movable shafts 331B and 332B.

  A pressure receiving plate 337 that moves up and down with the rotation of the link arm 331 is fixed between the left and right front rising side link arms 331, and the upper end of the air spring 34 is fixed to the pressure receiving plate 337. . Compressed air is supplied to the air spring 34 from an air supply source (not shown), and internal air is exhausted. Supply / exhaust to / from the air spring 34 is performed by operating a valve (not shown).

  The load of the occupant seated on the seat installed on the upper frame 31 is received by the air spring 34 via the pressure receiving plate 337 and is buffered together with the vibration absorbing action of the damper 35. Further, the air spring 34 bulges upward when air is supplied, whereby the upper frame 31 rises and the seat is adjusted to be high, and when exhausted, the air spring 34 contracts downward, thereby lowering the upper frame 31. The seat is adjusted low. When the vehicle includes an air brake device, an air compressor for the air brake device can be used as an air supply source of the air spring 34.

  The seat device 1 of the present embodiment has a three-point belt-in-seat structure in which a seat belt (not shown) is built in a seat, and a retractor 40 that winds and unwinds one end side of the seat belt includes an upper frame. 31 is fixed to a lateral member 312 on the rear side of 31 via a bracket 41. The retractor 40 has a built-in lock mechanism for locking the unwinding of the seat belt when an overload is applied from the unwound seat belt. Further, the metal fitting fixed to the other end side of the seat belt is detachably attached to the buckle 45 supported on the left side of the rear portion of the upper frame 31.

(2) Engagement mechanism Next, an engagement mechanism that engages the lower frame 32 with the stand 10 to suppress the forward tilt of the seat will be described.

  As shown in FIG. 1, a rectangular hole 111 that is long in the front-rear direction is formed in the rear portion of the stand plate 11 of the stand 10. At the rear end portion of the hole 111, a widened portion 111a having a larger width than other portions is formed. On the other hand, as shown in FIG. 3, a reinforcing plate (reinforcing member) 50 protruding downward is fixed to the lateral member 322 (322R) on the rear side of the lower frame 32. The reinforcing plate 50 is long in the left-right direction, and has a protruding portion 501 that protrudes outward in the left-right direction at the lower end thereof. When viewed from the rear side, the reinforcing plate 50 has a substantially convex shape. A rib 502 is formed at the upper end edge of the reinforcing plate 50 so as to project forward and backward. The reinforcing plate 50 has its upper end fixed to the horizontal member 312R by means such as welding in a state where the surface direction is along the horizontal and vertical directions.

  As shown in FIGS. 4 and 5, the reinforcing plate 50 is inserted from above into the hole 111 of the stand plate 11, and the protruding portions 501 on both sides of the lower end protrude to the lower surface side of the left and right peripheral edge portions 112 of the hole 111. The part 501 can be engaged with the peripheral edge 112 on the lower surface of the stand plate 11. When the lower frame 32 of the suspension mechanism 30 slides in the front-rear direction together with the slide rail 20, the reinforcing plate 50 slides in the hole 111 in the front-rear direction along the hole 111.

  The reinforcing plate 50 is inserted into the hole 111 by sliding the lower end portion where the protruding portions 501 are formed on both sides through the widened portion 111a of the hole 111 and positioned below the stand plate 11 and then sliding forward. Assembled. In the present embodiment, the engaging mechanism of the present invention is constituted by the protruding portions 501 on both sides of the lower end portion of the reinforcing plate 50 and the left and right peripheral edge portions 112 of the hole 111 of the stand plate 11 with which the protruding portions 501 engage. Is done.

  According to the present embodiment, for example, when a vehicle collision or the like occurs and the occupant sitting on the seat generates a force to jump forward, a load is applied from the seat belt to the retractor 40 and the unwinding of the seat belt is locked. Jumping forward is prevented. At this time, the force toward the front of the occupant is transmitted to the seat back via the seat belt, and the force acts so that the entire seat tilts forward. The force that the seat tilts forward tends to cause the suspension mechanism 30 to which the seat is fixed to rotate forward with the front end portion as a fulcrum. That is, the rear part of the lower frame 32 of the suspension mechanism 30 tends to float up.

  Here, in this embodiment, as shown in FIG. 6, when the reinforcing plate 50 tries to move upward when a force (indicated by an arrow G) is raised to raise the rear portion of the lower frame 32, The left and right protrusions 501 engage with the peripheral edge 112 of the hole 111 on the lower surface of the stand plate 11 via the rib 502 to receive a load, and the lower frame 32 is prevented from being lifted. As a result, the forward rotation of the lower frame 32 is restricted, and the force that causes the seat to tilt forward is less likely to be directly applied to the slide rail 20. For this reason, the load concerning the slide rail 20 can be reduced when the seat receives a forward tilting force.

  In particular, when the seat is adjusted forward, the front portion of the slide rail 20 protrudes forward from the fixed rail 13, and the slide rail 20 is engaged with the fixed rail 13 with a short length, the lower frame 32 is easy to roll forward, but the forward rotation of the lower frame 32 is prevented by the protrusion 501 of the reinforcing plate 50 engaging the lower surface of the stand plate 11, and the slide rail 20 may be peeled off from the fixed rail 13. Is avoided.

  Since the load applied to the slide rail 20 when the seat receives a forward tilting force as described above is reduced, it is not necessary to improve the strength of the slide rail 20 or the fixed rail 13, thereby increasing the weight. It is possible to prevent the slide rail 20 from peeling without inviting it.

  Further, in the present embodiment, since the reinforcing plate 50 that prevents the seat from tilting forward is fixed to the lower frame 32 and this reinforcing plate 50 is inserted into the hole 111 of the stand plate 11 of the stand 10, From the point of view, the weight is difficult to increase, and the increase in cost can be suppressed.

    DESCRIPTION OF SYMBOLS 1 ... Vehicle seat apparatus, 10 ... Stand, 111 ... Hole, 112 ... Peripheral part (engagement mechanism) of hole, 20 ... Slide rail, 32 ... Lower frame (base member), 50 ... Reinforcement board (reinforcement member), 501... Projection (engagement mechanism).

Claims (3)

A stand fixed to the vehicle floor,
A pair of left and right slide rails installed on the stand so as to be slidable in the front-rear direction, and the front part projects forward from the stand when sliding forward,
A base member fixed to the slide rail and supporting the seat;
In a vehicle seat device comprising:
The stand and the base member are provided with an engagement mechanism that is engaged between the pair of left and right slide rails so that the base member engages with the stand and restricts the forward movement of the base member. A vehicle seat device.   The vehicle seat device according to claim 1, wherein the engagement mechanism is provided at a position corresponding to a rear portion of the base member in a state where the slide rail slides forward. The stand is formed with a hole extending in the front-rear direction,
The base member is provided with a reinforcing member that is inserted into the hole from above and slides in the front-rear direction in the hole as the base member slides in the front-rear direction together with the slide rail.
The said engagement mechanism is comprised by the protrusion part formed in the said reinforcement member, and engaging with the lower surface of the peripheral part of the right and left of the said hole, and this peripheral part. Vehicle seat device.

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