WO2012011544A1 - 乗物用シート - Google Patents
乗物用シート Download PDFInfo
- Publication number
- WO2012011544A1 WO2012011544A1 PCT/JP2011/066619 JP2011066619W WO2012011544A1 WO 2012011544 A1 WO2012011544 A1 WO 2012011544A1 JP 2011066619 W JP2011066619 W JP 2011066619W WO 2012011544 A1 WO2012011544 A1 WO 2012011544A1
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- WO
- WIPO (PCT)
- Prior art keywords
- disposed
- plate
- load input
- load
- vehicle seat
- Prior art date
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Classifications
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- 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
- B60N2/4228—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 rear
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- 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
- B60N2/4235—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 transversal
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- 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
- B60N2/42709—Seats or parts thereof displaced during a crash involving residual deformation or fracture of the structure
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- 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
- B60N2/42745—Seats or parts thereof displaced during a crash involving substantially rigid displacement of the back-rest
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- 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
- B60N2/68—Seat frames
Definitions
- the present invention relates to a vehicle seat, and more particularly to a vehicle seat in which the peripheral structure of the side frame is downsized and the mounting workability of the peripheral members of the side frame is improved.
- a vehicle seat such as an automobile has a passenger seat above the seat back in order to protect the passenger's head and neck from impact loads caused by a rear collision and to reduce the impact on the neck.
- the headrest which receives the back from the back is provided.
- the provision of a headrest not only reduces the impact load on the body, but the impact load applied to the neck cannot be reduced unless the gap between the occupant's head and the headrest is quickly reduced during a rear-end collision. It may be difficult to reduce enough.
- a movable link member is disposed with respect to the side frame, and further, the link member is connected to the link member via the connecting member.
- Patent Document 2 As a technique for ensuring the safety of the occupant against such a side collision, a technique of disposing a side bracket on the side of the vehicle seat and on the door side is disclosed (see Patent Document 2). According to this technique, when an impact load from the side is applied, the impact load is transmitted to the vehicle seat via the receiving member (side bracket), and the vehicle body is not deformed without being deformed. By tilting to the position, it is possible to prevent the passenger and the vehicle body structure from coming into contact with each other.
- the seat back frame disclosed in Patent Document 1 receives the occupant's rearward movement at the pressure receiving member at the time of a rear collision, and as a result, the link member rotates to sufficiently sink the occupant to the seat back frame side. Can do.
- the urging means is attached to the link member, and since the rotation of the pressure receiving member is suppressed by the urging means in normal times, the seating feeling is not impaired.
- a plurality of stoppers for adjusting the movable allowable range of the link member are provided, and the range in which the occupant is depressed can be adjusted.
- a pressure receiving member with a link member disclosed in Patent Document 1 and a receiving member disclosed in Patent Document 2 are used as a vehicle seat.
- a plurality of members are concentrated on the side of the seat back frame, that is, around the side frame.
- the seating space for the occupant is narrowed, resulting in inconvenience that the comfort is reduced.
- each member when the space is saved by reducing the size of each member, the strength of each member is not sufficient, and the durability against the impact at the time of a rear collision and a side collision is lowered. There is a fear.
- the receiving member (side bracket) that protrudes laterally from the side frame directly receives the impact of the side collision, and therefore requires sufficient strength, and further effectively transmits the load caused by the side collision to the vehicle body side. Therefore, a certain size is required.
- the subject is a seat back frame having a side portion located on the side, a load input member that is disposed on the side of the seat back frame and receives a load from another member, and is connected to the seat back frame.
- a pressure receiving member that is connected via a member and supports an occupant; and is disposed on at least one side of the side portion, engages with the connecting member, and causes the pressure receiving member to be applied by an impact load applied to the pressure receiving member.
- the vehicle seat of the present invention receives the load caused by the collision, and further the seat frame By transmitting the load to the constituent members and further sinking the occupant's body backward in the event of a rear collision, the load applied to the occupant can be effectively reduced. Further, since the impact reducing member is also disposed on the side portion constituting the seat back frame, the pressure receiving member moves rearward by the impact reducing member when an impact load due to a rear collision is applied. Therefore, the load applied to the occupant can be effectively reduced by sinking the occupant's body backward at the time of a rear collision. Thus, by providing the load input member and the impact reducing member in the side portion, it has sufficient strength against the impact load of the side collision and the rear collision, and can efficiently absorb the impact load applied to the occupant. .
- the load input member is disposed on a laterally outer surface of the side portion, and the impact reducing member is disposed on a laterally inner surface of the side portion.
- the load input member is provided in the lateral direction (seat width direction) of the side portion (side frame) and the impact reduction member is provided in the lateral direction (seat width direction) of the side portion (side frame).
- the structure around the side portion (side frame) can be reduced in size.
- the load input member, the impact reducing member, and the side portion (side frame) are disposed, the load input member and the impact reducing member operate independently without interfering with each other. It is possible to absorb the impact load.
- the load input member includes a first plate member disposed in front and a second plate member disposed separately on the rear side of the first plate member, and at least a part of the impact reduction member. Is preferably disposed between the first plate and the second plate.
- the load input member includes at least a first plate member and a second plate member, and these plate members are disposed at positions facing each other in the front-rear direction. If at least a part of the impact reducing member is disposed between the plate members and the load input member includes at least a part of the impact reducing member, the structure around the impact reducing member can be further compacted. it can.
- the load input member further includes a first plate member disposed on the front side and a second plate member disposed on the rear side of the first plate member, and at least one of the impact reduction members.
- the portion may be disposed at a position overlapping with the first plate member and at a front side of the first plate member or a position overlapping with the second plate member and at a rear side of the second plate member.
- the load input member has a bulging portion that bulges forward or backward, and at least a part of the impact reducing member is disposed on the inner side in the front-rear direction of the bulging portion.
- the load input member is provided with high rigidity with respect to the load by forming the bulging portion on the member constituting the load input member and forming irregularities on the surface thereof. Therefore, the strength can be maintained even if the thickness of the member constituting the load input member is reduced, and as a result, a lightweight vehicle seat can be obtained. Since at least a part of the impact reducing member can be disposed inside the bulging portion, a sufficient space can be secured and the space can be used without waste, so the structure around the impact reducing member can be reduced in size. Can be realized.
- a gap is formed between the first plate member or the second plate member and a portion where at least a part of the impact reducing member provided on the side portion is provided. is there.
- a gap is formed between the plate material and the side portion (side frame).
- at least a part of the impact reducing member can be disposed in the gap. Therefore, the structure around the impact reducing member can be reduced in size without contacting the member constituting the impact reducing member and the member constituting the load input member.
- a hole is formed in a part of the load input member.
- the inside of the load input member can be visually observed through the hole even when the impact reducing member is disposed inside the load input member. Therefore, the installation status of the impact reducing member can be easily confirmed.
- the vehicle seat can be reduced in weight. Furthermore, since it is possible to insert a tool through the hole, the assembly work of other members provided in the vehicle seat is facilitated, and the degree of freedom in design and workability are improved.
- at least a part of the impact reducing member is disposed at a position where it does not overlap and separate in the left-right direction with respect to the load input member provided on the side of the seat back frame. Therefore, the configuration around the impact reducing member does not become complicated.
- the operator can easily attach the respective members during assembly. As a result, it is possible to effectively reduce the load against a side collision or a rear collision, and it is possible to simplify the structure around the seat back frame, that is, the side portion (side frame).
- the side portion includes a flat side plate and a rear edge portion bent inward from an end portion located on the rear side of the side plate, and a part of the load input member is opposed to the rear edge portion. It is preferable that at least a part of the impact reducing member is disposed on the front side of the load input member.
- the rear end portion is bent inward, and the load input member is disposed so as to be opposed to the rear edge portion and be substantially flush with each other. Strength against load caused by collision) is improved. Further, when a large load is applied at the time of a side collision, the load is smoothly transmitted from the load input member to the rear edge portion of the side portion, so that the strength against the load from the side is improved.
- the side portion includes a flat side plate and a rear edge portion bent inward from an end portion located on the rear side of the side plate, and is disposed so as to overlap along the vertical direction of the rear edge portion. It is preferable that at least a part of the impact reducing member is disposed in front of the tubular member apart from the tubular member. With such a configuration, the attachment strength of the tubular member (main pipe) disposed along the side portion and the rigidity against the load are improved. Furthermore, since the tubular member is disposed away from the impact reducing member, the tubular member does not interfere with each other and does not hinder the operation of the impact reducing member. Therefore, the strength against the load can be improved and the impact reducing member can be moved smoothly.
- the side portion includes a convex portion bulging inward at a position where at least a part of the impact reducing member is disposed, and the tubular member includes the convex portion and the rear edge portion. It is preferable to be disposed between the two.
- the impact reducing member is configured by providing the convex portion bulging inward in the side portion (side frame) and disposing at least a part of the impact reducing member in the convex portion. When the member is disposed, the positioning becomes easy. Furthermore, by arranging the tubular member in the space formed between the convex portion and the rear edge portion bent inward at the side portion, the space can be used without waste, and as a result, the side portion (side The structure around the frame) can be made compact.
- the vehicle seat of claim 1 by providing the load input member and the impact reducing member in the side portion, the vehicle seat has sufficient strength against the impact load of the side collision and the rear collision, and is applied to the occupant. Can be absorbed efficiently.
- the load input member and the impact reducing member are provided on the outer side surface (laterally outer side surface) and the inner side surface (laterally inner side surface) of the side part via the side parts, respectively.
- the structure around the side portion can be reduced in size.
- a part of the impact reducing member that moves the occupant rearward by moving the pressure receiving member rearward is disposed so as to overlap the load input member.
- the structure can be made compact, and the degree of freedom in design is improved.
- the structure around the impact reducing member can be further downsized without increasing the size.
- the installation status of the impact reducing member can be visually confirmed.
- the unevenness shape with the bulging portion is provided on the surface of the load input member, whereby the rigidity of the load input member with respect to the load is improved and the impact reducing member is provided in the bulging portion.
- the structure around the impact reducing member is reduced in size.
- the inside of the load input member can be visually observed through the hole provided in the load input member, and the installation state of the impact reducing member can be confirmed. Further, by cutting out the hole portion, the weight of the load input member itself is reduced, and as a result, a lightweight vehicle seat can be provided.
- the structure around the side portion can be simplified, The workability of attaching each part is improved.
- the vehicle seat of the tenth aspect by arranging the load input member and the rear edge portion of the side portion to face each other, the strength against the load is improved and the transmission of the load between the members is efficiently performed. be able to.
- the strength of the seat back frame is improved and the rigidity against the load at the time of collision is improved by arranging the tubular member constituting the seat back frame along the side portion.
- the convex portion by providing the convex portion on the side portion, positioning becomes easy at the time of installing the member constituting the impact reducing member of the impact reducing member, and further, the convex portion and the rear edge portion are arranged.
- FIG. 1 is a schematic perspective view of a seat frame according to an embodiment of the present invention. It is an enlarged explanatory view showing the relationship between the load input member and the side frame according to an embodiment of the present invention.
- FIG. 4 is a schematic cross-sectional explanatory diagram corresponding to the line AA in FIG. 3. It is a schematic sectional explanatory drawing of the seat back frame before rotation of the impact reduction member which concerns on one Embodiment of this invention. It is a schematic sectional explanatory drawing of the seat back frame after rotation of the impact reduction member which concerns on one Embodiment of this invention.
- FIG. 10 is an enlarged explanatory view showing a relationship between a load input member and a side frame according to still another embodiment of the present invention.
- FIG. 13 is a schematic cross-sectional explanatory diagram corresponding to the line BB in FIG. 12.
- a vehicle means a vehicle for traveling on which a seat can be mounted, such as a vehicle for traveling on the ground having wheels such as an automobile or a railroad, an aircraft or a ship moving on the ground, and the like.
- the normal seating load includes a seating impact that occurs when sitting, a load during acceleration caused by sudden start of the vehicle, and the like.
- the load at the time of rear collision is a large load generated by the rear collision, and indicates a large rear collision by the vehicle from the rear side, a large collision at the time of reverse traveling, etc., and is similar to the load generated at the time of normal seating.
- the load area is not included.
- the load at the time of a side collision is a large load caused by a side collision, and refers to a large rear-end collision caused by a vehicle from the side. It is not included.
- the left-right direction means the left-right direction with the vehicle facing forward, and is the direction that coincides with the width direction of the seat back frame 1 described later.
- the front-rear direction means the front-rear direction in a state where an occupant is seated.
- FIG. 1 is a schematic perspective view of a seat
- FIG. 2 is a schematic perspective view of a seat frame
- FIG. 3 is an enlarged view showing a relationship between a load input member and a side frame.
- 4 is a schematic cross-sectional explanatory view corresponding to the line AA in FIG. 3
- FIG. 5 is a schematic cross-sectional explanatory view of the seat back frame before the impact reducing member is rotated
- FIG. 6 is a rotation of the impact reducing member.
- FIG. 7 is an enlarged explanatory view showing the relationship between the impact reducing member and the urging means
- FIG. 8 is an exploded explanatory view of the impact reducing member and the urging means
- FIG. 9 is a rear view.
- FIG. 10 is an explanatory view showing the state of the impact reducing member and the urging means before and after the collision
- the vehicle seat S includes a seat back S ⁇ b> 1 (back part), a seating part S ⁇ b> 2, and a headrest S ⁇ b> 3, and the seat back S ⁇ b> 1 (back part) and the seating part S ⁇ b> 2 are seats.
- Cushion pads 1a and 2a are placed on the frame F and covered with skin materials 1b and 2b.
- the headrest S3 is formed by arranging a pad material 3a on a core material (not shown) of the head and covering it with a skin material 3b.
- Reference numeral 19 denotes a headrest pillar that supports the headrest S3.
- the seat frame F of the vehicle seat S includes a seat back frame 1 constituting the seat back S1 and a seating frame 2 constituting the seat portion S2.
- the seating frame 2 has the structure in which the cushion pad 2a is placed as described above and is covered with the skin material 2b from above the cushion pad 2a, and the occupant is supported from below.
- the seating frame 2 is supported by a leg portion, and an inner rail (not shown) is attached to the leg portion, and is assembled in a slide type that can be adjusted in the front-rear position with an outer rail installed on the vehicle body floor. Yes.
- the rear end portion of the seating frame 2 is connected to the seat back frame 1 via a reclining mechanism 11.
- the seat back S1 has the cushion pad 1a mounted on the seat back frame 1 as described above and is covered with the skin material 1b from above the cushion pad 1a, and supports the back of the occupant from the rear.
- the seat back frame 1 is a substantially rectangular frame and includes a side portion, an upper portion, and a lower portion.
- the side portion has two side frames 15 that are spaced apart in the left-right direction and extend in the up-down direction in order to form a seat back width.
- the main pipe 16 as a tubular member which connects the upper end part side of the side frame 15 is extended upwards from the side part, and comprises the upper part.
- the main pipe 16 not only constitutes an upper portion, but also extends upward from one side frame 15 and then extends to the other side frame 15 and further extends downward to It is composed.
- the main pipe 16 is formed in an annular shape that goes around the upper portion, the side portion, and the lower portion and constitutes a frame.
- the main pipe 16 may have rigidity capable of withstanding the load at the time of collision. For example, other shapes may be used.
- the lower portion of the seat back frame 1 is formed by connecting the lower end side of the side frame 15 with the lower frame 17.
- the lower frame 17 has an extended portion 17a that is connected to the lower side of the side frame 15 and extends downward, and an intermediate portion 17b that connects both sides.
- the extended portion 17a is an obstacle in relation to the seating frame 2. It is extended to the extent that there is no.
- the side frame 15, the main pipe 16, and the lower frame 17 are formed as separate members, but may be formed as an integral plate frame or the like. Moreover, it is good also as a structure which attached apparatuses, such as a power motor, in a lower part.
- the main pipe 16 as a tubular member is bent into a substantially rectangular shape, and a side surface portion 16 a of the main pipe 16 is partially along the vertical direction with respect to the side plate 15 a of the side frame 15.
- a side surface portion 16 a of the main pipe 16 is partially along the vertical direction with respect to the side plate 15 a of the side frame 15.
- a headrest S3 is disposed above the main pipe 16 constituting the upper portion.
- the headrest S3 is configured such that the pad material 3a is provided on the outer peripheral portion of the core material (not shown) and the outer periphery of the pad material 3a is covered with the skin material 3b.
- a pillar support 18 is disposed on the main pipe 16.
- a headrest pillar 19 (see FIG. 1) that supports the headrest S3 is attached to the pillar support portion 18 via a guide lock (not shown), and the headrest S3 is attached.
- the side frame 15 as a side portion constituting a part of the seat back frame 1 is configured with a predetermined length in the vertical direction and is opposed to the horizontal frame with a predetermined interval.
- the side frame 15 of the present embodiment is an extending member that constitutes a side surface of the seat back frame 1, and is U-shaped from a flat side plate 15 a and a front end portion (end portion located on the vehicle front side) of the side plate 15 a. And a rear edge 15c bent inwardly in an L shape from the rear end (see FIG. 7).
- the front edge portion 15b of the present embodiment is formed with a protrusion 15d that protrudes toward the rear edge 15c, and the protrusion 15d is a member for locking the spring.
- a locking hole 33 is formed as a stop.
- the inside of the rear edge portion 15c of the present embodiment is disposed in contact with the surface of the pipe-shaped main pipe 16 (see FIG. 4).
- a part of the side plate 15a is bent and provided with an opening, and a part of the surface of the main pipe 16 protrudes from the opening.
- a load at the time of collision is applied.
- the load input member 40 to be received is joined.
- the load input member 40 is disposed to receive a load at the time of a side collision and further transmit the load to other members constituting the seat frame F such as the side frame 15 and the main pipe 16.
- it is preferably attached to a side frame 15 disposed on the door side of the vehicle.
- the load input member 40 is a member that receives a load at the time of a side collision of the vehicle.
- the load input member 40 is not limited to this, and it is not limited to this. It may be a member that receives a load, a member that receives a load from the airbag when the airbag unit is activated, such as an airbag attachment member, or a member that receives a load due to its own weight, such as a motor. May be.
- the load input member 40 includes a first plate member 41 and a second plate member 42 which are opposed to each other in the front-rear direction and are joined to each other.
- the first plate member 41 disposed on the vehicle front side includes an upper edge portion 41b bent rearward in an L shape from the upper end of the front plate 41a, and a side edge of the front plate 41a opposite to the side frame 15. Side edge part 41c bent backward from L to L, and lower edge part 41d bent backward from L at the lower end of front plate 41a.
- the second plate member 42 disposed on the vehicle rear side is overlapped with each edge portion of the first plate member 41, and an upper edge portion 42b bent forward in an L shape from the upper end of the rear plate 42a, and a rear plate 42a has a side edge portion 42c bent forward in an L shape from the side end opposite to the side frame 15, and a lower edge portion 42d bent forward in an L shape from the lower end of the rear plate 42a. is doing.
- the load input member 40 of the present embodiment is joined to the side frame 15 and the main pipe 16 that partially protrudes from the side frame 15, the casing structure is closed on all sides. Durability against load is improved. Further, since the load input member 40 is directly joined to the main pipe 16, the load can be dispersed by twisting the main pipe 16 when a load is applied from the side.
- the load input member 40 is disposed so that the rear edge portion 15c of the side frame 15 and the rear plate 42a of the load input member 40 face the side frame 15 and are substantially flush with each other (FIG. 4). reference). With such a configuration, the mounting rigidity of the load input member 40 is improved, and load transmission from the side is facilitated.
- the front plate 41a of the first plate 41 has a recess 41e and a bulge 41g
- the rear plate 42a of the second plate 42 has a recess 42e and a bulge 42g.
- an uneven structure is formed on the surface of the load input member 40, so that the load input member 40 can improve the strength against a load at the time of a side collision.
- the recessed part 41e and the recessed part 42e which comprise an uneven structure are formed in the position which opposed, and the surface of the recessed part 41e and the recessed part 42e is mutually joined (refer FIG. 4).
- the concave portions 41e and 42e are not joined, when the concave portions 41e and 42e are joined, the same strength can be ensured even if the plate thickness is reduced. Therefore, the vehicle seat S can be reduced in weight.
- holes 41f and 42f are formed in the front plate 41a of the first plate member 41 and the rear plate 42a of the second plate member 42, respectively.
- the shape of the holes 41f and 42f is not particularly limited, but the load input member 40 can be reduced in weight by cutting the holes 41f and 42f.
- the holes 41f and 42f are formed so as to avoid the end portions of the first plate member 41 and the second plate member 42 on the side contacting the side frame 15 or the main pipe 16. It is preferable.
- a plurality of holes 41 f and 42 f may be formed in the first plate member 41 and the second plate member 42.
- a pressure receiving member 20 as a posture holding member that supports the cushion pad 1a from behind is disposed in the inner region of the seat back frame 1.
- the pressure receiving member 20 of the present embodiment is a member in which resin is formed in a plate-like substantially rectangular shape, and smooth irregularities are formed on the surface in contact with the cushion pad 1a. As shown in FIG. 2, claw portions for locking the wires 21 and 22 are formed on the upper side and the lower side on the back side of the pressure receiving member 20.
- the pressure receiving member 20 of this embodiment is supported by the connecting member. That is, two wires 21 and 22 as connecting members are laid between the side frames 15 on both sides, and the pressure receiving member 20 is connected to the pressure receiving member 20 by the claw portions formed at predetermined positions on the upper side and the lower side of the pressure receiving member 20.
- the pressure receiving member 20 is engaged and supported on the back surface of the cushion pad 1a.
- the wires 21 and 22 are formed from a steel wire having spring properties, and an uneven portion that is a bent portion is formed.
- the wire 22 positioned below is formed with a concavo-convex portion, whereby a load exceeding a predetermined value (impact reduction described later).
- the pressure receiving member 20 is configured to move rearward with a larger amount of movement due to a large deformation due to a larger load than a movable or rotating load of the member.
- both ends of the wire 21 locked to the upper side of the two wires 21 and 22 locked to the pressure receiving member 20 of the present embodiment are arranged on the side frames on both sides. 15 is hooked on a mounting hook 37 provided on 15.
- both ends of the wire 22 locked to the lower side are hooked to the locking portions 31 of the moving member 30 mounted on the left and right side frames 15.
- the moving member 30 as an impact reducing member moves to the rear of the vehicle by the impact load transmitted through the connecting member (wire 22) when a predetermined impact load or more is applied to the pressure receiving member 20 due to a rear collision or the like, and the pressure receiving member. 20 is moved backward, and the occupant is moved backward.
- “Movement” refers to movement such as horizontal movement and rotation.
- the moving member 30 that rotates about the shaft portion 32 as a rotating shaft will be described.
- the moving member 30 of the present embodiment has a shaft that is rotatable inside a side plate 15 a of the side frames 15 on both sides via a shaft portion 32 (described later) as a rotating shaft.
- the wire 22 is supported so as to lock the wire 22 at a lower position as a connecting member, and is connected to a spring (tensile coil spring 35) as an urging means for urging the wire 22. That is, the moving member 30 is connected to the urging means 35, and is configured to urge the pressure receiving member 20 toward the front side of the seat back frame 1 via the connecting member 22.
- the moving member 30 of this embodiment is disposed inside the side frame 15 by a pivotable shaft portion 32.
- the shaft portion 32 includes a shaft member 32a, a shaft hole 32b provided in the moving member 30, a hole portion 32c provided in the side plate 15a of the side frame 15, and a fitting member 32d.
- the shaft member 32a is inserted into the shaft hole 32b and fitted into the hole 32c, and the fitting member 32d is fitted from the distal end side of the shaft member 32a, so that the movable member 30 can be pivoted.
- the side plate 15a of the side frame 15 has a convex portion 15e that bulges inward at the position where the shaft portion 32 is disposed.
- the main pipe 16 is disposed between the convex portion 15e of the side frame 15 and the rear edge portion 15c. With such a configuration, the main pipe 16 is disposed in a gap formed by the convex portion 15e and the rear edge portion 15c, so that the installation location of the main pipe 16 does not increase in size, and the periphery of the side frame 15 is increased.
- the configuration can be made compact and space can be saved.
- the shaft portion 32 as a rotating shaft is positioned and disposed at a position of a shaft hole 32b provided in the side frame 15. At this time, as shown in FIG. 4, at least a part of the moving member 30 is disposed at a position overlapping the load input member 40 in the left-right direction. That is, the shaft portion 32 (more specifically, at least one of the shaft member 32a and the fitting member 32d) is disposed so that a part thereof overlaps the load input member 40 in the rotation axis direction. ing. In the present embodiment, the shaft portion 32 is disposed so as to partially overlap the front plate 41 a of the load input member 40.
- the shaft portion 32 When the shaft portion 32 is disposed so as to overlap the front plate 41a of the load input member 40, it is preferable that a part of the shaft portion 32 is disposed further forward than the front plate 41a. Or when the axial part 32 is arrange
- the projecting portion 15 e bulging inward of the side frame 15 is formed at the position where the shaft portion 32 is disposed, so that the shaft portion 32 (more specifically, The fitting member 32d) is configured to be fitted into the convex portion 15e.
- the fitting member 32d is disposed without contacting the front plate 41a (or the rear plate 42a) of the load input member 40, and the load input member 40 is not too close to the vehicle door side. It can be made into a space.
- the front board 41a (or rear board 42a) of the load input member 40 may be configured such that a part of the position where the shaft portion 32 is disposed is cut away.
- the moving member 30 of the present embodiment includes a rotatable shaft portion 32, a connecting member locking portion 31 formed at a predetermined distance from the shaft portion 32, and a biasing means locking portion ( A locking recess 31a) and a movement blocking part 39 for blocking movement (turning) are provided.
- the locking portion 31 for locking the connecting member (wire 22) of the present embodiment is long in order to facilitate the attachment of the bent hook-shaped end portion (the hook portion 22a) of the wire 22 that is the connecting member. It is formed by a hole. And the latching
- locking part 31 is integrally formed with the latching recessed part 31a for latching the below-mentioned urging means (tensile coil spring 35).
- the forming portion 30 c of the locking portion 31 is formed to extend in the outer peripheral direction from a rising portion 30 b formed so as to rise continuously on the outer peripheral side of the base portion 30 a constituting the moving member 30.
- the locking portion (locking recess 31a) of the biasing means of the present embodiment locks the end portion of the tension coil spring 35, which is the biasing means, and the forming portion on which the locking portion 31 is formed.
- a part of the locking portion 31 of 30c is formed so as to be cut out rearward of the vehicle.
- the latching recessed part 31a is formed in the position ahead of a vehicle from the line Y which ties the position where the center of the axial part 32 and the wire 22 of the latching part 31 are hooked.
- the tension coil spring 35 as the biasing means in the present embodiment is formed by coiling a spring wire, and hooks 35a are formed in both ends at a semicircular shape.
- the hook 35 a of the tension coil spring 35 is locked to the locking recess 31 a of the moving member 30 and the locking hole 33 of the protrusion 15 d of the side frame 15. With such a configuration, the moving member 30 is biased toward the front side of the seat back frame 1 by the tension coil spring 35.
- the movement prevention unit 39 of this embodiment is for preventing movement (turning) when the moving member 30 moves (turns). As shown in FIGS. 5, 6, and 7, A part of the base portion 30a protrudes continuously from the outer peripheral side of the base portion 30a that is in sliding contact with the side plate 15a when moved (rotated) about the shaft portion 32, and further rises substantially vertically. This movement prevention part 39 controls the movement (rotation) of the moving member 30.
- the movement preventing portion 39 is formed to bend and rise in a direction away from the side plate 15 a of the side frame 15.
- Each of the movement preventing portions 39 is a contact portion that contacts the main pipe 16 after movement (rotation) of the moving member 30 and prevents movement (rotation).
- the height of the end portion in the seat inner direction of the movement blocking portion 39 that contacts the main pipe 16 is formed so as to contact the surface of the main pipe 16 when contacting.
- the height of the end portion in the seat inner direction of the movement preventing portion 39 only needs to be disposed inside the central axis (line X) of the main pipe 16 (see FIG. 4).
- abuts reliably with respect to the surface of the main pipe 16 the movement of the moving member 30 can be controlled stably.
- the movement prevention unit 39 is provided to restrict the movement (turning) setting range of the moving member 30.
- the movement prevention unit 39 is moved to the main pipe. It is set so that the movement (turning) stops when it abuts against 16.
- the movement preventing portion 39 of the moving member 30 is integrally formed by extending the moving member 30 in the outer circumferential direction, and its abutting surface comes into contact with the main pipe 16 after moving (turning).
- the movement (rotation) of the moving member 30 can be stably and reliably stopped with a simple and strong configuration.
- the movement preventing portion 39 is formed at a position where it does not interfere with an urging means (tensile coil spring 35) and a connecting member (wire 22) which will be described later.
- the movement preventing portion 39 of the moving member 30 is configured to directly contact the main pipe 16 to prevent movement (turning), but the movement preventing portion 39 and the main pipe 16
- a silencer such as a rubber having a thickness that does not hinder the stability of the movement (rotation) stop of the moving member 30 can be attached. If it comprises, the stable movement (rotation) prevention can be performed, and the silencing effect can be expected.
- the moving member 30 described above is attached to the side frames 15 on both sides, and the hook portions 22a that are both ends of the wire 22 are hooked on the engaging portions 31 of the respective moving members 30 on both sides.
- the moving members 30 are individually operated.
- the moving members 30 are attached to the side frames 15 on both sides, but the moving members 30 attached to both sides are configured to move (turn) independently of each other. For this reason, when the load is generated unevenly, the moving members 30 move (rotate) independently at the side portions on both sides in accordance with the load, and the occupant depends on the magnitude of the impact load. You can sink your body.
- the tension coil spring 35 urges the moving member 30 to move (rotate) to the front side of the seat back frame 1.
- the tension coil spring 35 connected to the moving member 30 has a load characteristic that does not bend in a load region generated during normal seating, the moving member 30 is always restrained to the initial position. Yes. That is, the force for returning to the initial state against the force for moving (turning) the moving member 30 is configured to be the largest during normal seating.
- FIG. 5 shows the moving member 30 at the time of rear collision before the impact reducing member is rotated
- FIG. 6 shows after the impact reducing member is rotated
- the chain line indicates the state before the rear collision
- the solid line indicates the state after the rear collision. Show.
- FIG. 9 when an occupant tries to move backward due to an impact from the rear, this load is applied to the pressure receiving member 20 (not shown in FIG. 9) and the pressure receiving member 20.
- Tension is applied in the direction of moving (turning) the moving member 30 rearward (left side in FIG. 9) via the stopped wire 22.
- the tension at this time is a load sufficient to extend the tension coil spring 35 that holds the moving member 30 in the initial position and to move (turn) the moving member 30 backward.
- the threshold value of the force at which the moving member 30 starts moving (turning) is set to a value larger than the normal seating load.
- the threshold value of the force at which the moving member 30 starts moving (turning) is normally applied to the seat back S1 in a seated state (excluding a small impact caused by a seating impact or a sudden start of a vehicle). Since such a load is about 150N, the threshold value is preferably larger than 150N. If it is smaller than this value, it moves at the time of normal seating and is not preferable because it lacks stability. Further, it is preferable to set a value larger than 250 N in consideration of a seating impact that occurs during normal seating and a load during acceleration caused by a sudden start of the vehicle. It does not operate and can maintain a stable state.
- the moving member 30 when the moving member 30 is moved (rotated) rearward, the wire 22 hooked on the locking portion 31 moves rearward, and the pressure receiving member locked to the wire 22 together with the wire 22 is moved backward. 20 and the cushion pad 1a supported by the pressure receiving member 20 can move rearward, and the occupant can be sunk into the seat back S1.
- the movement (turning) characteristics of the moving member 30 at the time of a rear collision will be described in more detail with reference to FIG.
- the locking portion 31 that locks the wire 22 and the locking recess 31 a that locks the lower end portion of the tension coil spring 35 are more vehicles than the shaft portion 32.
- the upper end portion of the tension coil spring 35 is locked in a locking hole 33 formed in the projection 15 d of the side frame 15 positioned above the moving member 30.
- the moving direction of the locking recess 31a does not coincide with the direction in which the tension coil spring 35 extends. That is, the movement (rotation) amount of the moving member 30 and the tensile load (deflection amount) of the tension coil spring 35 are not proportional. In other words, the rotation angle of the moving member 30 and the tension coil The torque (rotational force) in the forward rotation direction provided by the spring 35 is not simply proportional.
- the locking recess 31a for locking the lower end portion of the tension coil spring 35 draws an arcuate locus with the shaft portion 32 as the rotation center, whereas the locking recess 31a for locking the upper end portion of the tension coil spring 35 is locked.
- the hole 33 is formed as a fixed end fixedly joined to the upper side of the moving member 30.
- the moving member 30 Since the moving member 30 has the above-described movement (turning) characteristics with respect to the tension generated via the wire 22, when the rear collision occurs, the occupant can be seated back reliably and efficiently. It can be made to sink in the cushion pad 1a of S1. At this time, the occupant's back is moving backward by sinking into the seat back S1, but the position of the headrest S3 does not change relatively, so the gap between the headrest S3 and the head is reduced, and the headrest S3 Can be effectively supported, thereby effectively reducing the impact applied to the neck.
- the moving member 30 is provided on the left and right side frames 15 .
- the moving member 30 may be provided only on the side frame 15 on which the load input member 40 is provided.
- the connecting members (wires) 21 and 22 can be directly locked to the side frame 15 on the side where the moving member 30 is not provided.
- the example in which the moving member 30 is disposed on the inner side of the seat back frame 1 (side frame 15) is shown.
- the moving member 30 may be configured on the outer side.
- the load input member 40 is provided outside the seat back frame 1 and the moving member 30 is provided inside, the space can be used effectively, and the configuration around the side frame 15 can be downsized. .
- the degree of freedom in designing the vehicle seat S is high, which is preferable.
- the example in which the moving member 30 is provided on the inner side of the seat back frame 1 and the load input member 40 is provided on the outer side in the left-right direction of the seat back frame 1 is described. May be arranged in an overlapping position on either the left or right inner side or the outer side of the seat back frame 1.
- the shaft portion 32 is completely inside the load input member 40. It is installed in the form included in. That is, the shaft portion 32 (more specifically, at least one of the shaft member 32a and the fitting member 32d) is disposed between the front plate 41a and the rear plate 42a of the load input member 40. With such a configuration, the installation of the shaft portion 32 can be saved in space, and the fitting member 32d of the shaft portion 32 is protected by the load input member 40, so that the mounting strength of the moving member 30 is improved. .
- the front plate 41a and the rear plate 42a are formed with recesses 41e and 42e, respectively.
- a bulging portion 41g and a bulging portion provided so as to expand in the front direction or the rear direction are provided between the plurality of concave portions 41e and the concave portions 42e arranged in the vertical direction.
- a protruding portion 42g is formed.
- the bulging part is good also as a structure provided in any one of the front board 41a and the rear board 42a.
- the shaft portion 32 is disposed inside the bulging portion 41g and the bulging portion 42g, that is, in a space formed by the bulging portion 41g and the bulging portion 42g.
- the configuration around the shaft portion 32 is not increased without wasting space.
- the holes 41f and 42f are formed in the load input member 40 as described above. Therefore, even if the shaft portion 32 is included in the load input member 40, the installation location of the shaft portion 32 can be visually observed through the holes 41f and 42f, so that the moving member 30 can be easily installed. Can be done. Furthermore, since a tool can be inserted through the holes 41f and 42f, other members can be installed around the load input member 40.
- FIGS. 11 to 13 a seat frame F according to still another embodiment of the present invention will be described with reference to FIGS. 11 to 13.
- it since it is the same as that of the said embodiment other than the relative position of the axial part 32 and the load input member 40, it shows with the same code
- the shaft portion 32 is disposed so as to overlap a part of the load input member 40 (more specifically, the front plate 41a), in this embodiment, the position does not overlap the load input member 40. Installed.
- the shaft portion 32 as a rotating shaft is positioned and disposed at a position of a shaft hole 32b provided in the side frame 15. At this time, as shown in FIG. 13, at least a part of the moving member 30 is disposed at a position that does not overlap the load input member 40 in the left-right direction. That is, the shaft portion 32 is disposed at a position that does not overlap the load input member 40 in the rotation axis direction.
- the shaft portion 32 is disposed in front of the front plate 41a of the load input member 40, and the shaft portion 32 (more specifically, the shaft member 32a and the fitting member 32d) is the rotation shaft thereof. They are spaced apart so as not to overlap the load input member 40 in the direction.
- the shaft portion 32 is installed outside the load input member 40 formed in a casing shape, workability is improved without being obstructed by the load input member 40 when the shaft portion 32 is attached. In addition, since the operator can visually check the shaft portion 32 without being blocked by the load input member 40, the installation state of the shaft portion 32 can be confirmed.
- an example is shown in which the shaft portion 32 is disposed in front of the front plate 41a.
- a configuration may be employed in which the shaft portion 32 is disposed rearward from the rear plate 42a.
- the load input member 40 is provided to be separated rearward from the shaft portion 32. Further, as described above, the rear plate 42a of the second plate member 42 constituting the load input member 40 is provided on the side frame 15. It is opposed to the rear edge 15c and is disposed flush. As a result, the rigidity of the load input member 40 with respect to the load at the time of the side collision is improved, and the transmission of the load at the time of the side collision is performed smoothly. Therefore, the load at the side collision constitutes the seat frame F ′. It is possible to transmit effectively to the member.
- the shaft portion 32 is disposed in front of the load input member 40 and in front of the main pipe 16 joined to the rear edge portion 15 c of the side frame 15.
- the main pipe 16 is reinforced by the side frame 15 and the main pipe 16 and the shaft portion 32 do not come into contact with each other. Therefore, the moving member 30 described below can move smoothly around the shaft portion 32. .
- the convex part 15e which bulged toward the inner side of the side frame 15 is formed in the arrangement
- the shaft portion 32 (more specifically, the fitting member 32d) is configured to be fitted into the convex portion 15e.
- the moving member 30 is provided inside the seat back frame 1 and the load input member 40 is provided outside the seat back frame 1 is described.
- the moving member 30 and the load input member 40 are connected to the seat back frame. It is good also as a structure arrange
- the seat back S1 of the front seat of the automobile has been described as a specific example.
- the present invention is not limited to this, and the same configuration can be applied to the seat back of the rear seat. .
Abstract
Description
さらに、衝撃低減部材もまたシートバックフレームを構成するサイド部に配設されているため、後面衝突による衝撃荷重が加わった際、衝撃低減部材により、受圧部材が後方へ移動する。したがって、後面衝突時には乗員の身体を後方へ沈み込ませることにより、乗員に加わる荷重を効果的に低減することができる。
このように、サイド部において荷重入力部材と衝撃低減部材とを備えることにより、側面衝突や後面衝突の衝撃荷重に対して十分な強度を備えると共に、乗員に加わる衝撃荷重を効率よく吸収可能である。
このように、荷重入力部材をサイド部の(サイドフレーム)の左右方向(シート幅方向)外側、衝撃低減部材を、サイド部(サイドフレーム)の左右方向(シート幅方向)内側にそれぞれ備えることにより、サイド部(サイドフレーム)周辺の構造を小型化することができる。
また、荷重入力部材と衝撃低減部材とサイド部(サイドフレーム)を介して配設されているので、荷重入力部材と衝撃低減部材とが互いに干渉することなく、独立して作動するため、効率よく衝撃荷重を吸収することが可能となる。
衝撃低減部材を構成する部材の少なくとも一部が、シートバックフレームの側方に設けられる荷重入力部材に対し、左右方向において、重なる位置に配設されているため、衝撃低減部材の周辺構成が大型化することがない。その結果、側面衝突や後面衝突等に対する荷重を効果的に低減することが可能であると共に、シートバックフレーム側方、すなわちサイド部(サイドフレーム)の周辺構造をコンパクト化することができる。したがって、乗物用シートの設計時、サイド部(サイドフレーム)回りの構造が大型化することがないため、設計の自由度が向上する。さらに、衝撃低減部材の少なくとも一部が荷重入力部材によって覆われる構成となるため、衝撃低減部材を保護することができる。
荷重入力部材は、少なくとも、第1板材と第2板材を備えており、これら板材は、前後方向に離間して対向する位置に配設されている。そして、これら板材の間に衝撃低減部材の少なくとも一部を配設し、荷重入力部材に衝撃低減部材の少なくとも一部を内包させる構成とすると、衝撃低減部材周辺の構造をさらにコンパクト化することができる。
このような構成とすると、衝撃低減部材の少なくとも一部を構成する部材及び荷重入力部材を設置した後であっても、外側から衝撃低減部材の設置状態を目視できるため、作業性が高い。
このように、荷重入力部材を構成する部材に膨出部を形成し、その表面に凹凸を形成することによって、荷重入力部材は、荷重に対し高い剛性を備える。したがって、荷重入力部材を構成する部材の板厚を薄くしても強度を保持することができ、その結果、軽量な乗物用シートとすることができる。
そして、膨出部の内側に衝撃低減部材の少なくとも一部を配設することができるので、十分な空間が確保されると共に空間を無駄なく使うことができるので、衝撃低減部材周辺の構造を小型化することが可能となる。
衝撃低減部材の衝撃低減部材の少なくとも一部と、荷重入力部材を構成する板材とが重なって配設される部分において、その板材と、サイド部(サイドフレーム)との間に空隙が形成されていると、衝撃低減部材の少なくとも一部をその空隙内に配設することができる。したがって、衝撃低減部材を構成する部材と、荷重入力部材を構成する部材とが接触することなく、衝撃低減部材周辺の構造を小型化することができる。
荷重入力部材の一部に孔が形成されていると、衝撃低減部材が荷重入力部材の内側に配設された場合であっても、孔を介して荷重入力部材の内側を目視することができるため、衝撃低減部材の設置状況を容易に確認することができる。
また、孔を設けることによって荷重入力部材の一部が切除されるため、乗物用シートを軽量化することができる。
さらに、孔を介して工具を差し込むことも可能であるため、乗物用シートに備えられる他の部材の組み付け作業が容易になり、設計の自由度、並びに作業性が向上する。
このように、衝撃低減部材の少なくとも一部が、シートバックフレームの側方に設けられる荷重入力部材に対し、左右方向において、離間して重ならない位置に配設されている。したがって、衝撃低減部材周辺の構成が複雑化することがない。また、各部材が重なって配設された構造としないことにより、組み立て時、作業者は容易に各部材を取り付けていくことができる。その結果、側面衝突や後面衝突等に対する荷重を効果的に低減することが可能であると共に、シートバックフレーム側方、すなわちサイド部(サイドフレーム)の周辺構造を簡素化することができる。したがって、乗物用シートの製造時、サイド部(サイドフレーム)回りの作業が複雑化することがないため、作業性が向上する。さらに、衝撃低減部材周辺の取り付け作業が簡素化されるため、作業者の熟練度を必要とせず、均一な品質の乗物用シートとすることができる。
このように、サイド部において、後端部を内側へ屈曲させ、荷重入力部材をこの後縁部と対向し、ほぼ面一となるように配設することにより、荷重(特に、側方からの衝突による荷重)に対する強度が向上する。さらに、側面衝突時の大きな荷重が加わった際、荷重入力部材からサイド部の後縁部にその荷重がスムーズに伝達されるため、より側方からの荷重に対する強度が向上する。
このような構成とすると、サイド部に沿って配設される管状部材(メインパイプ)の取り付け強度や、荷重に対する剛性が向上する。さらに、管状部材は、衝撃低減部材と離間して配設されているため、互いに干渉することなく、衝撃低減部材の動作を妨げることがない。したがって、荷重に対する強度を向上させると共に、衝撃低減部材をスムーズに可動させることができる。
このように、サイド部(サイドフレーム)において内側に向かって膨出した凸部を設け、この凸部内に衝撃低減部材の少なくとも一部を配設する構成とすることにより、衝撃低減部材を構成する部材を配設する際、その位置決めが容易になる。さらに、凸部とサイド部において内側に屈曲した後縁部との間に形成される空間内に管状部材を配設することにより、空間を無駄なく使うことができ、その結果、サイド部(サイドフレーム)周辺の構成のコンパクト化を図ることができる。
請求項2の乗物用シートによれば、荷重入力部材と衝撃低減部材を、サイド部を介してそれぞれサイド部の外側面(左右方向外側面)、内側面(左右方向内側面)に備えることにより、サイド部周辺の構造を小型化することができる。
請求項3の乗物用シートによれば、受圧部材が後方へ移動することによって乗員を後方へ移動させる衝撃低減部材の一部が、荷重入力部材と重なって配設されるため、サイド部回りの構造をコンパクト化することができ、設計の自由度が向上する。
請求項4の乗物用シートによれば、衝撃低減部材の少なくとも一部が包含される構成であるため、衝撃低減部材周辺の構造が大型化することなく、さらにコンパクト化することができる。
請求項5の乗物用シートによれば、荷重入力部材と衝撃低減部材をシートバックフレームに設置した後であっても、衝撃低減部材の設置状況を目視して確認することができる。
請求項6の乗物用シートによれば、荷重入力部材の表面に膨出部を伴った凹凸形状が設けられることにより、荷重に対する荷重入力部材の剛性が向上すると共に、膨出部内に衝撃低減部材の少なくとも一部が配設されることにより、衝撃低減部材周辺の構造をさらにコンパクト化することができる。
請求項7の乗物用シートによれば、荷重入力部材と、サイド部との間に形成される空隙内に衝撃低減部材の少なくとも一部が配設されるため、衝撃低減部材周辺の構造を小型化することができる。
請求項8の乗物用シートによれば、荷重入力部材に設けられた孔を介して、荷重入力部材の内部を目視することができ、衝撃低減部材の設置状況を確認することができる。また、孔の部分を切除することにより、荷重入力部材自体の重量が軽くなり、その結果、軽量な乗物用シートを提供することができる。
請求項9の乗物用シートによれば、衝撃低減部材の少なくとも一部が、荷重入力部材と重ならない位置に離間して配設されるため、サイド部回りの構造を簡素化することができ、各部品の取り付け作業の作業性が向上する。さらに、各部品の取り付け作業後の確認が容易に行えるようになる。
請求項10の乗物用シートによれば、荷重入力部材とサイド部の後縁部を対向するように配設することにより、荷重に対する強度が向上すると共に、部材間の荷重の伝達を効率よく行うことができる。
請求項11の乗物用シートによれば、シートバックフレームを構成する管状部材をサイド部に沿わせることにより、シートバックフレームの強度が向上し、衝突時の荷重に対する剛性が向上する。
請求項12の乗物用シートによれば、サイド部に凸部を設けることにより、衝撃低減部材の衝撃低減部材を構成する部材の設置時、位置決めが容易となり、さらに、凸部と後縁部の間に管状部材を配設する構成とすることにより、サイド部周辺の構成がコンパクト化される。
S1 シートバック
S2 着座部
S3 ヘッドレスト
F シートフレーム
1 シートバックフレーム
2 着座フレーム
1a,2a,3a クッションパッド(パッド材)
1b,2b,3b 表皮材
11 リクライニング機構
15 サイドフレーム
15a 側板
15b 前縁部
15c 後縁部
15d 突起部
15e 凸部
16 メインパイプ(管状部材)
16a 側面部
17 下部フレーム
17a 延長部
17b 中間部
18 ピラー支持部
19 ヘッドレストピラー
20 受圧部材
21,22 ワイヤ(連結部材)
22a 鈎部
30 移動部材(衝撃低減部材)
30a ベース部
30b 立上り部
30c 形成部
31 係止部
31a 係止凹部
32 軸部
32a 軸部材
32b 軸孔
32c 孔部
32d 嵌め合わせ部材
33 係止孔
35 引張りコイルばね(付勢手段)
35a フック
37 取付けフック
39 移動阻止部
40 荷重入力部材
41 第1板材
41a 前板
41b 上縁部
41c 側縁部
41d 下縁部
41e 凹部
41f 孔
41g 膨出部
42 第2板材
42a 後板
42b 上縁部
42c 側縁部
42d 下縁部
42e 凹部
42f 孔
42g 膨出部
また、左右方向とは、乗物前方を向いた状態での左右方向を意味し、後述するシートバックフレーム1の幅方向と一致する方向である。また、前後方向とは、乗員が着座した状態での前後方向を意味するものである。
本実施の形態に係る乗物用シートSは、図1で示すように、シートバックS1(背部)、着座部S2、ヘッドレストS3より構成されており、シートバックS1(背部)及び着座部S2はシートフレームFにクッションパッド1a,2aを載置して、表皮材1b,2bで被覆されている。なお、ヘッドレストS3は、頭部の芯材(不図示)にパッド材3aを配して、表皮材3bで被覆して形成される。また符号19は、ヘッドレストS3を支持するヘッドレストピラーである。
着座フレーム2は、上述のようにクッションパッド2aを載置して、クッションパッド2aの上から表皮材2bによって覆われており、乗員を下部から支持する構成となっている。着座フレーム2は脚部で支持されており、この脚部には、図示しないインナレールが取り付けられ、車体フロアに設置されるアウタレールとの間で、前後に位置調整可能なスライド式に組み立てられている。
また着座フレーム2の後端部は、リクライニング機構11を介してシートバックフレーム1と連結されている。
なお、本実施形態のシートバックフレーム1は、サイドフレーム15とメインパイプ16と下部フレーム17とが別部材で形成されているが、一体の板状フレーム等で形成することもできる。また、ロアー部においてパワーモータ等の装置を取り付けた構成としても良い。
本実施形態のサイドフレーム15は、シートバックフレーム1の側面を構成する延伸部材であり、平板状の側板15aと、この側板15aの前端部(乗物前方側に位置する端部)からU字型に内側に折り返した前縁部15bと、後端部からL字型に内側へ屈曲した後縁部15cとを有している(図7参照)。
また、本実施形態の後縁部15cの内側は、パイプ状のメインパイプ16の表面と当接して配設されている(図4参照)。なお、図3に示すように、側板15aの一部は屈曲すると共に開口部が設けられており、その開口部からメインパイプ16の表面の一部が突出するように配設されている。
この荷重入力部材40は、側面衝突時の荷重を受け、その荷重をさらにサイドフレーム15、メインパイプ16等、シートフレームFを構成する他の部材に伝達させるために配設されるものであり、特に乗物のドア側に配設されたサイドフレーム15に取り付けられていると好ましい。
なお、本実施形態では荷重入力部材40として、乗物の側面衝突時の荷重を受ける部材としたが、これに限定されず、アームレストを取り付けるために配設されるアームレスト取付部材のように、乗員から荷重を受ける部材でも良く、エアバッグ取付部材のようにエアバッグユニットが作動した時にエアバッグから荷重を受ける部材でも良く、また、モータのように自重により取付部材が荷重を受けるような部材であっても良い。
本実施形態の荷重入力部材40は、サイドフレーム15と、サイドフレーム15から一部突出したメインパイプ16に対して接合されることにより、四方が閉じた筐体構造になるため、側方からの荷重に対する耐久性が向上する。また、メインパイプ16に対して荷重入力部材40が直接接合されているため、側方からの荷重がかかった際、メインパイプ16を捻れさせることによってもその荷重を分散させることができる。
そして、本実施形態の移動部材30は、回動可能な軸部32によって、サイドフレーム15の内側に配設されている。
移動阻止部39はそれぞれ移動部材30の移動(回動)後にメインパイプ16と当接して移動(回動)を阻止する当接部である。そして、メインパイプ16と当接する移動阻止部39のシート内側方向の端部の高さは、当接時にメインパイプ16の表面に対して当接するように形成されている。
この移動阻止部39は、後述する付勢手段(引張りコイルばね35)や連結部材(ワイヤ22)と干渉しない位置に形成される。
本実施形態では、移動部材30が、両側のサイドフレーム15に取り付けられているが、これら両側に取り付けられた移動部材30は、互いに独立して移動(回動)するように構成されている。このため、荷重が偏って生じた場合において、荷重に合わせて両側のサイド部で移動部材30が、各々独立して移動(回動)することになり、衝撃荷重の大きさに応じて、乗員の身体を沈み込ませることができる。
ここで、移動部材30が移動(回動)を始める力の閾値について、通常着座している状態(ここでは、着座衝撃や乗物の急発進によって生じる小さな衝撃は除いている)でシートバックS1にかかる荷重は150N程度であるので、閾値は150Nより大きい値が好ましい。この値より小さいと、通常の着座時に移動してしまい、安定性に欠けるため、好ましくない。
さらに通常の着座時に生じる着座衝撃や、乗物の急発進等によって生じる加速時の荷重を考慮して、250Nより大きな値に設定することが好ましく、このようにすると、後面衝突以外では移動部材30が作動せず、安定した状態を維持することができる。
移動部材30の移動(回動)前の初期位置においては、ワイヤ22を係止する係止部31と引張りコイルばね35の下端部を係止する係止凹部31aは、軸部32よりも乗物前方に位置するように配置されており、引張りコイルばね35の上端部は移動部材30の上方に位置するサイドフレーム15の突起部15dに形成された係止孔33に係止されている。
すなわち、移動部材30の移動(回動)量と、引張りコイルばね35の引張り荷重(たわみ量)は比例しない構成となっており、さらに換言すれば、移動部材30の回動角度と、引張りコイルばね35により与えられる前方回動方向のトルク(回転力)は単純に比例しない関係となっている。
このとき、乗員の背部がシートバックS1に沈み込むことで後方に移動しているが、ヘッドレストS3の位置は相対的に変わらないため、ヘッドレストS3と頭部の隙間が縮まり、ヘッドレストS3で頭部を支持することができるため、頸部へ加わる衝撃を効果的に軽減する効果を奏する。
また、上記実施形態では移動部材30がシートバックフレーム1(サイドフレーム15)の内側に配設された例を示したが、外側に設けられた構成であっても良い。ただし、シートバックフレーム1の外側に荷重入力部材40を設け、移動部材30を内側に、設けた構成とすると、空間を有効に活用でき、サイドフレーム15の周辺の構成を小型化することができる。その結果、乗物用シートSの設計の自由度が高いため好ましい。
さらに、上記実施形態では、移動部材30をシートバックフレーム1の内側に、荷重入力部材40をシートバックフレーム1の左右方向外側に設けた例を示したが、移動部材30と荷重入力部材40とを、シートバックフレーム1の左右方向内側、又は外側の何れか一方の側において、重なる位置に配設した構成としても良い。
以下、本発明の他の実施形態のシートフレームFに関し、図10を参照して説明する。なお、軸部32と荷重入力部材40の相対位置以外、他の構成は上記実施形態と同様であるため、図中において同じ符号で示し、その説明を省略する。
以下、本発明のさらに他の実施形態のシートフレームFに関し、図11乃至図13を参照して説明する。なお、軸部32と荷重入力部材40の相対位置以外、他の構成は上記実施形態と同様であるため、図中において同じ符号で示し、その説明を省略する。
Claims (12)
- 側方に位置するサイド部を有するシートバックフレームと、
該シートバックフレームの側方に配設され、他部材からの荷重が入力される荷重入力部材と、
前記シートバックフレームに連結部材を介して連結され、乗員を支持する受圧部材と、
前記サイド部の少なくとも一方側に配設されると共に、前記連結部材に係合し、前記受圧部材に加わった衝撃荷重により前記受圧部材を後方へ移動させる衝撃低減部材と、を備えたことを特徴とする乗物用シート。 - 前記荷重入力部材は、前記サイド部の左右方向外側の面に配設され、
前記衝撃低減部材は、前記サイド部の左右方向内側の面に配設されてなることを特徴とする請求項1に記載の乗物用シート。 - 前記衝撃低減部材の少なくとも一部は、前記荷重入力部材と左右方向において重なる位置に配設されてなることを特徴とする請求項1または2に記載の乗物用シート。
- 前記荷重入力部材は、前方に配設される第1板材と、該第1板材の後方側に離間して配設される第2板材とを有し、
前記衝撃低減部材の少なくとも一部は、前記第1板材と前記第2板材との間に配設されてなることを特徴とする請求項3に記載の乗物用シート。 - 前記荷重入力部材は、前方側に配設される第1板材と、該第1板材の後方側に離間して配設される第2板材とを有し、
前記衝撃低減部材の少なくとも一部は、前記第1板材と重なる位置であって該第1板材の前方側、又は前記第2板材と重なる位置であって該第2板材の後方側に配設されてなることを特徴とする請求項3または4に記載の乗物用シート。 - 前記荷重入力部材は、前方又は後方に膨出する膨出部を有し、
前記衝撃低減部材の少なくとも一部は、前記膨出部の前後方向内側に配設されてなることを特徴とする請求項3乃至5のいずれか一項に記載の乗物用シート。 - 前記第1板材又は前記第2板材と、前記サイド部に配設された前記衝撃低減部材の少なくとも一部が配設される部分との間には、空隙が形成されてなることを特徴とする請求項5に記載の乗物用シート。
- 前記荷重入力部材の一部には、孔が形成されてなることを特徴とする請求項3乃至7のいずれか一項に記載の乗物用シート。
- 前記衝撃低減部材の少なくとも一部は、前記荷重入力部材と左右方向において重ならない位置に配設されてなることを特徴とする請求項1または2に記載の乗物用シート。
- 前記サイド部は、平板状の側板と、該側板の後方側に位置する端部から内側へ屈曲した後縁部とを備え、
前記荷重入力部材の一部は、前記後縁部と対向する位置に配設され、
前記衝撃低減部材の少なくとも一部は、前記荷重入力部材の前方側に配設されてなることを特徴とする請求項9に記載の乗物用シート。 - 前記サイド部は、平板状の側板と、該側板の後方側に位置する端部から内側へ屈曲した後縁部とを備え、
該後縁部の上下方向に沿って重なるように配設された管状部材をさらに有し、
前記衝撃低減部材の少なくとも一部は、前記管状部材と離間して該管状部材の前方に配設されてなることを特徴とする請求項9または10に記載の乗物用シート。 - 前記サイド部は、前記衝撃低減部材の少なくとも一部が配設される位置に、内側に向かって膨出した凸部を備え、
前記管状部材は、前記凸部と前記後縁部との間に配設されてなることを特徴とする請求項11に記載の乗物用シート。
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JP2013189150A (ja) * | 2012-03-14 | 2013-09-26 | Ts Tech Co Ltd | 乗物用シート |
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JP2016147670A (ja) * | 2016-05-23 | 2016-08-18 | テイ・エス テック株式会社 | 乗物用シート |
JP2016147671A (ja) * | 2016-05-23 | 2016-08-18 | テイ・エス テック株式会社 | 乗物用シート |
JP2017202829A (ja) * | 2017-08-24 | 2017-11-16 | テイ・エス テック株式会社 | 乗物用シート |
Also Published As
Publication number | Publication date |
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US9156382B2 (en) | 2015-10-13 |
US20130113246A1 (en) | 2013-05-09 |
CN103052533A (zh) | 2013-04-17 |
GB201302957D0 (en) | 2013-04-03 |
DE112011102422T5 (de) | 2013-05-16 |
GB2495891A (en) | 2013-04-24 |
CN103052533B (zh) | 2015-09-23 |
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