WO2019082876A1 - Coussin de siège pour siège de véhicule et siège de véhicule - Google Patents

Coussin de siège pour siège de véhicule et siège de véhicule

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Publication number
WO2019082876A1
WO2019082876A1 PCT/JP2018/039300 JP2018039300W WO2019082876A1 WO 2019082876 A1 WO2019082876 A1 WO 2019082876A1 JP 2018039300 W JP2018039300 W JP 2018039300W WO 2019082876 A1 WO2019082876 A1 WO 2019082876A1
Authority
WO
WIPO (PCT)
Prior art keywords
seat
cushion
seat cushion
frame
load
Prior art date
Application number
PCT/JP2018/039300
Other languages
English (en)
Japanese (ja)
Inventor
藤田　悦則
川崎　誠司
裕太 平本
昌宏 黒本
中村　実
Original Assignee
デルタ工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2018186176A external-priority patent/JP2019077437A/ja
Application filed by デルタ工業株式会社 filed Critical デルタ工業株式会社
Priority to US16/758,311 priority Critical patent/US11155193B2/en
Priority to EP18871339.0A priority patent/EP3702210B1/fr
Publication of WO2019082876A1 publication Critical patent/WO2019082876A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/02—Seat parts
    • A47C7/28—Seat parts with tensioned springs, e.g. of flat type
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • 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
    • B60N2/64—Back-rests or cushions
    • 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
    • B60N2/64—Back-rests or cushions
    • B60N2/66—Lumbar supports
    • 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
    • B60N2/70—Upholstery springs ; Upholstery

Definitions

  • the present invention relates to the technology of a vehicle seat used for cars, aircrafts, trains and the like.
  • the present applicant uses a cushion layer as a cushion layer or a tension structure in which a three-dimensional knitted fabric or a two-dimensional net material is stretched and provided on a cushion frame or back frame in order to reduce the weight of a vehicle seat and improve vibration absorption characteristics.
  • Various structures have been proposed (see Patent Documents 1 and 2).
  • a flexible plate-like member is arrange
  • a technique is disclosed that moves and improves vibration absorption characteristics.
  • the setting of the static spring constant and the dynamic spring constant in the seat cushion is set in a predetermined relationship according to the position of the human body support portion of the seat cushion, thereby improving the vibration absorption characteristics.
  • Patent Documents 1 to 3 are lightweight and excellent in vibration absorption characteristics and the like. However, in a vehicle seat, improvement in vibration absorption characteristics and the like is always sought. In addition, the human needs oxygen, and the person is induced to a steady state by ensuring an environment where oxygen can be easily taken in. The same applies to the case of sitting on a vehicle seat, and in order to reduce fatigue and achieve a comfortable ride, it is important to be able to breathe comfortably in the sitting state. Therefore, it is desirable that the vehicle seat not only can reduce stress on a person due to vibration or acceleration inputted from the vehicle body while traveling, but also can maintain a posture that does not disturb a person's comfortable breathing.
  • the present invention has been made in view of the above, and can reduce stress on a seated person due to vibration, acceleration and the like, and can easily maintain an easy-to-reserve breathable seat cushion and seat for a vehicle seat
  • the challenge is to provide
  • the seat cushion of the vehicle seat of the present invention is A seat cushion for a vehicle seat, A seat cushion base layer supported by the cushion frame; And a cushioning layer for a seat cushion disposed on the seat cushion base layer;
  • the seat cushion base layer is
  • the cushion frame is provided with left and right base supports provided at a distance from each other in the width direction of the cushion frame and including a position corresponding to the left and right ischial tuberosities of the seat occupant.
  • the left and right base support portions are connected via an elastic member for a base support portion, and are movably supported by the cushion frame,
  • the left and right base supports can move in six degrees of freedom around positions corresponding to ischial tuberosities, respectively.
  • the seat cushion of the vehicle seat is a seat cushion of a vehicle seat provided with a seat back, A seat cushion base layer supported by the cushion frame; And a cushioning layer for a seat cushion disposed on the seat cushion base layer;
  • the seat cushion base layer is Left and right base supports provided at positions corresponding to the left and right ischial tuberosities of the seat occupant, mutually spaced in the width direction of the cushion frame;
  • An elastic member for a base supporting portion which is stretched in the width direction center of the cushion frame and is stretched between the left and right base supporting portions and exerts a restoring force in a direction to make the left and right base supporting portions approach each other; It is characterized by having.
  • the base supporting portion elastic member be formed of a coil spring, and a plurality of the base supporting portion elastic members be disposed between the left and right base supporting portions along the front-rear direction of the cushion frame.
  • the left and right base support parts include a support cloth supported on the cushion frame, and a buffer member laminated on the support cloth.
  • the buffer member is configured to have a three-dimensional three-dimensional knit.
  • the buffer member covers an outer pad member having a substantially rectangular frame shape, an inner pad member disposed in an inner space of the outer pad member, and covers the front and back surfaces of the inner pad member, and the front surface of the outer pad member It is preferable to be configured to have a cover member attached to the back surface.
  • the outer pad member is a bead foam
  • the inner pad member is a three-dimensional three-dimensional knit.
  • the vehicle seat of the present invention is a vehicle seat provided with a seat cushion and a seat back, and the seat cushion is used.
  • the seat back includes a seat back base layer supported by a back frame, and a seat back cushion layer disposed to cover the seat back base layer, and the seat back base layer is the seat back base layer.
  • a seatback base fabric stretched between left and right side frames of the backframe, and a lumbar support elastically supported via a spring member in a range closer to the lower side than a substantially central portion in the vertical direction of the backframe; It is preferable to have The seatback base fabric is longer than the vertical length of the lumbar support, and has a size that covers between a frame disposed closer to the upper part of the back frame and a frame disposed closer to the lower part. Is preferred.
  • the lumbar support is A plate-like bead foam for lumbar, a three-dimensional solid knit disposed in a hole formed in the bead foam for lumbar, and the front and back surfaces of the three-dimensional solid knit are coated, and the bead foam for the lumbar It is preferable to include a planar support member for lumbar having a cover member attached to the front and back surfaces of the body.
  • the ratio of the forward path area (a1) in the range including the forward path curve to the return path area (b1) in the range including the backward path curve is defined as the load characteristic area ratio (b1 / a1) of the seat cushion
  • the ratio of the forward path area (a2) in the range including the forward path curve to the return path area (b2) in the range including the return path curve is the load characteristic area ratio of the seatback (b2 / a2), (B1 / a1)> (b2 /
  • the difference between the load characteristic area ratio (b1 / a1) of the seat cushion and the load characteristic area ratio (b2 / a2) of the seatback is preferably in the range of 3 to 15%. It is preferable that the spring constant of the equilibrium point in the forward curve of the load-deflection characteristic of the seat back is 15000 N / m or more.
  • the damping ratio of the seat back is larger than the damping ratio of the seat cushion obtained from the free damping waveform when dropping a weight of 6.7 kg from the height of 20 mm to the seat cushion and the seat back, respectively. Is preferred.
  • the deflection difference at each measurement point of 300 mm and 300 mm is preferably 4 mm or more and less than 10 mm.
  • the seat cushion urges the left and right base support portions provided in the range including the position corresponding to the left and right ischial tubers of the seated person in the approaching direction, and elastically deforms in the vertical direction.
  • a seat cushion base layer having an elastic member near the widthwise center of the cushion frame is provided, whereby the seat cushion has a high spring characteristic. Therefore, each base support portion can move in six degrees of freedom around a position corresponding to the ischial tubercle, and the surface supporting the buttocks in the seat cushion is easily moved. As a result, the ability to follow displacement is high, the sense of unity between a person and a vehicle such as a car can be enhanced, and the ride quality can be improved.
  • the seat back it is preferable to have a seat back base fabric which is stretched between the left and right side frames of the back frame over a longer range vertically than the lumbar support.
  • the damping ratio of the seat back can be made higher than that of the seat cushion.
  • the ratio of the area of the range including the return curve to the area of the range including the forward curve, connecting the origin, the maximum displacement point, and the maximum load point in predetermined load-deflection characteristics load characteristics With regard to the area ratio
  • the seat cushion be set to be larger than the seat back.
  • the seat cushion emphasizes the spring characteristic more than the damping characteristic
  • the seat back emphasizes the damping characteristic more than the spring characteristic, and is configured to have a remarkable characteristic difference between the seat cushion and the seat back. is there.
  • the present invention has an effect and effect that the dispersion property of the body pressure is high in the seat back, but the resonance frequency rises until it becomes equal to the internal resonance frequency only by enhancing the attenuation characteristic of the seat back.
  • the elastic member for a base supporting portion is disposed at a portion supporting the center of gravity of the trunk, that is, near the center in the width direction of the cushion frame to improve surface rigidity and resonance frequency is internal resonance.
  • the balance with the attenuation characteristic of the seat back is achieved, the head shake is suppressed, and the feeling of stiffness in the buttocks is reduced. It can be done.
  • the breathing moves the central part of the trunk mainly in the range from the pelvis to the chest
  • the elastic member for the base support portion is disposed near the center in the width direction of the cushion frame. Is more likely to be given resilience.
  • the seat back since the seat back has high damping characteristics as described above, the restoring force from the seat cushion is transmitted along the seat surface and is attenuated and dispersed in the seat back. The restraint in the vicinity of the chest in the seat back is small, and it can promote comfortable breathing.
  • the base elastic members are provided near the widthwise center of the cushion frame
  • the outer portions of the left and right base support parts provided at positions corresponding to the left and right ischial tubers are rigid without using the elastic members. It is preferable to support on a high cushion frame. As a result, the trunk side of the seated person is supported, and the collapse of the posture can be suppressed.
  • due to the movement of the base-portion elastic member near the widthwise center of the seat cushion there is no cramping feeling even when the trunk side is supported.
  • the base elastic member near the center in the width direction of the seat cushion from a plurality of coil springs, the rigidity of the portion becomes high, while the ischial tubercle is supported by the base support portion, The sense of unity with the movement of the seat cushion is increased, and the stability of the sitting posture is enhanced.
  • FIG. 1 is a perspective view showing a vehicle seat according to a first embodiment of the present invention.
  • FIG. 2 is a front view of FIG.
  • FIG. 3 is a sectional view taken along the line AA of FIG.
  • FIG. 4 is an exploded perspective view of the main part of the vehicle seat according to the first embodiment.
  • FIG. 5 is a view for explaining the configuration of the seat cushion base layer.
  • FIG. 6 is a view for explaining the configuration of the cushioning member of the seat cushion base layer.
  • FIG. 7 is a view for explaining the configuration of the seatback base layer.
  • FIGS. 8A and 8B are diagrams for explaining an example in which a three-dimensional three-dimensional knitted fabric is used as a support fabric of the base layer for seat cushion.
  • FIG. 9 (a) and 9 (b) are diagrams for explaining an example in which a three-dimensional three-dimensional knit fabric is used as a seatback base fabric for a seatback base layer.
  • FIG. 10 is a cross-sectional view taken along line BB in FIG.
  • FIG. 11 is a view for explaining the operation of the seat cushion base layer.
  • FIG. 12 is a view showing the load characteristic area ratio of the seat cushion and the seat back in Test Example 1, Test Example 2 and Comparative Example.
  • FIG. 13 is a view showing load-deflection characteristics of the seat cushion of Test Example 1.
  • FIG. 14 is a view showing load-deflection characteristics of the seat cushion of Test Example 2.
  • FIG. 15 is a view showing load-deflection characteristics of the seat cushion of the comparative example.
  • FIG. 10 is a cross-sectional view taken along line BB in FIG.
  • FIG. 11 is a view for explaining the operation of the seat cushion base layer.
  • FIG. 12 is a view showing the load characteristic area ratio of
  • FIG. 16 is a view showing load-deflection characteristics of the seaback of Test Example 1.
  • FIG. 17 is a view showing load-deflection characteristics of the seat back of Test Example 2.
  • FIG. 18 is a view showing load-deflection characteristics of the seat back of the comparative example.
  • FIG. 19 is a view showing measurement results of vibration transfer rates in Test Example 1, Test Example 2 and Comparative Example.
  • FIG. 20 is an exploded perspective view of a main part of a vehicle seat according to a second embodiment of the present invention.
  • FIG. 21 is a perspective view showing a vehicle seat according to a third embodiment of the present invention.
  • FIG. 22 is a front view of FIG.
  • FIG. 23 is a sectional view taken along line AA of FIG. FIG.
  • FIG. 24 (a) is a view for explaining the configuration of the seat cushion base layer
  • FIG. 24 (b) is a cross-sectional view taken along the line CC of FIG. 24 (a).
  • FIG. 25 is a view for explaining the configuration of the buffer member of the seat cushion base layer.
  • FIG. 26 is a view for explaining the configuration of the seatback base layer.
  • FIG. 27 (a) is an exploded perspective view of the cushioning member
  • FIG. 27 (b) is a transverse cross-sectional view at the longitudinal center of the cushioning member.
  • FIG. 28 is an exploded perspective view of a lumbar planar support member.
  • FIG. 29 (a) and 29 (b) are diagrams for explaining an example in which a three-dimensional three-dimensional knit fabric is used as a support fabric for a seat cushion base layer.
  • FIG. 30 is a cross-sectional view taken along the line BB in FIG.
  • FIG. 31 is a view for explaining the operation of the seat cushion base layer.
  • FIG. 32 is a diagram showing measurement results of vibration transfer rates in Test Example 3 and Comparative Example.
  • FIG. 33 is a perspective view showing a vehicle seat according to a fourth embodiment of the present invention.
  • FIG. 34 is a front view of FIG.
  • FIG. 35 is a sectional view taken along the line AA of FIG.
  • FIG. 36 is an exploded perspective view of the main part of the vehicle seat according to the fourth embodiment.
  • FIG. 37 is an exploded perspective view of a seatback planar support member.
  • FIG. 38 shows the rigidity of the back frame of the seat used for SUVs of domestic and European cars and the high rigidity frame adopted as the back frame of the vehicle seat according to the fourth embodiment used in the experimental example. It is a graph compared.
  • 39 (a) and 39 (b) show experimental results of resonance characteristics with respect to a sine wave excitation force.
  • FIGS. 40 (a) to 40 (c) are diagrams showing the measurement results of transient responsiveness measured when a subject with a weight of 60 kgf is seated.
  • FIGS. 41 (a) and 41 (b) are diagrams showing attenuation characteristics measured when a subject with a weight of 60 kgf is seated.
  • FIG. 42 (a) is a view showing the measurement results of transient responsiveness of a subject weighing 77 kgf
  • FIG. 42 (b) is a view showing a part of FIG. 42 (a) in an enlarged manner.
  • Fig.43 (a) is a figure which showed the body pressure distribution of a commercial vehicle seat
  • FIG.43 (b) is a body pressure distribution of the non-repellent 3D net sheet which is a vehicle seat which concerns on 4th Embodiment.
  • FIGS. 44 (a) to 44 (c) are diagrams showing the back base layer of each sheet used in the seat back comparison experiment.
  • FIG. 45 is a diagram for explaining measurement points of load-deflection characteristics and damping characteristics.
  • FIGS. 45 is a diagram for explaining measurement points of load-deflection characteristics and damping characteristics.
  • FIGS. 46 (a) to 46 (c) are diagrams showing the seat cushion and seat back load-deflection characteristics of each sheet.
  • FIGS. 47 (a) to 47 (c) are free attenuation waveforms showing the attenuation characteristics of the seat back of each sheet.
  • FIGS. 48 (a) to 48 (c) are diagrams showing the relationship between Xi and Xi + 1 obtained by the free damped oscillations of FIGS. 47 (a) to 47 (c).
  • FIG. 49 is a graph showing the damping ratio of each sheet.
  • FIGS. 50 (a) and 50 (b) are diagrams comparing the attenuation characteristics of the G sheet and the RB sheet.
  • 51 (a) and 51 (b) are diagrams showing the pressure distribution of the subjects A and D separately for each sheet.
  • FIGS. 52 (a) to 52 (d) are diagrams showing the vibration transfer rates in the vertical direction of the subjects A to D seated on the respective sheets.
  • FIGS. 1 to 11 are views showing a vehicle seat 1A according to a first embodiment of the present invention, including a seat cushion 100 and a seat back 200, which are connected via a reclining mechanism 300, The seat back 200 can be reclined with respect to the seat cushion 100 fixed to the slider 400.
  • the seat cushion 100 includes a cushion frame 110, a seat cushion base layer 120, and a seat cushion cushion layer 130 (see FIG. 1).
  • the cushion frame 110 is supported by the slider 400.
  • the slider 400 has left and right lower rails 410 and 410 fixed to a vehicle body floor (not shown) at predetermined intervals in the width direction of the seat cushion 100, and upper rails slidably disposed on the respective lower rails 410 and 410.
  • the left and right cushion side frames 111 and 111 constituting the cushion frame 110 are connected to and supported by the upper rails 420 and 420.
  • the front edge frame 112 is stretched along the width direction of the seat cushion 100 between the front ends between the left and right cushion side frames 111, 111, and the rear edge frame 113 between the rear ends.
  • the front edge side reinforcing frame 114 is stretched slightly behind the front edge frame 112 between the left and right cushion side frame 111, 111, and the rear edge side reinforcing frame 115 is stretched forward of the rear edge frame 113.
  • the arrangement height of the rear edge reinforcing frame 115 is lower than that of the rear edge frame 113, and a predetermined amount of downward stroke (see FIGS. 10 and 11) of the seat cushion base layer 120 at that position is secured. It can be done.
  • the seat cushion base layer 120 is, as shown in FIG. 4, left and right base support portions 1210 and 1210 arranged at intervals in the width direction of the cushion frame 110 and an elastic member for the base support portion.
  • a plurality of coil springs 1220 and 1220 are provided.
  • Each base support 1210, 1210 is provided in a range including a position corresponding to the ischial tuberosity of the seated person, and supports a portion corresponding to the ischial tubercle. Further, as shown in FIGS. 4 to 6, the support cloths 121 and 121 and buffer members 1212 and 1212 are provided.
  • the supporting cloths 121 and 121 are composed of a two-dimensional cloth or a thin three-dimensional cloth (for example, a three-dimensional three-dimensional knit to be described later). Although the shape is arbitrary, it is formed in a substantially rectangular shape in the present embodiment, and the front portion 1211 a, the rear portion 1211 b and the outer portion 1211 c are supported by the cushion frame 110. 5 and 6 show an example using a two-dimensional cloth as the supporting cloths 121 and 121. In FIG. Specifically, one end of a front strip member 1231 is connected to the front portion 1211 a of the supporting fabric 1211, and one end of a rear strip member 1232 is connected to the rear portion 1211 b.
  • the front belt-like member 1231 is wound around the front edge frame 112 so as to turn downward from the upper side
  • the rear belt-like member 1232 is wound around the rear edge frame 113 so as to rotate downward from the upper side.
  • the other ends of the partial belt member 1231 and the rear belt member 1232 are connected via a connecting elastic member 1233 (see FIG. 3).
  • a coil spring is used as the connecting elastic member 1233.
  • the front portions 1211a and the rear portions 1211b of the support cloths 121 and 121 constituting the base support portions 1210 and 1210 are movably supported with respect to the cushion frame 110, and a portion corresponding to the ischial tuberosity is centered Then, the front part 1211a and the rear part 1211b become free rotation ends.
  • the outer portions 1211c and 1211c of the supporting cloths 121 and 121 are formed in a loop shape, and notched portions 1211c1 and 1211c1 are formed at predetermined intervals along the front-rear direction of the seat cushion 100,
  • the outer engagement metal wires 1211 d and 1211 d are inserted into the loop-like outer portions 1211 c and 1211 c (see FIG. 4). As a result, the outer engagement metal wires 1211d and 1211d are exposed in the range of the notches 1211c1 and 1211c1.
  • the notches 1211c1 and 1211c1 are located inside the cushion side frames 111 and 111 and higher than the positions where the front edge frame 112, the front edge side reinforcement frame 114, and the rear edge side reinforcement frame 115 are disposed.
  • a plurality of engaging pieces 111a and 111a are formed at positions corresponding to (see FIG. 4). Therefore, when the outer engagement metal wires 1211d and 1211d exposed from the notches 1211c1 and 1211c1 are engaged with the engagement pieces 111a and 111a, the outer portions 1211c and 1211c of the support cloths 121 and 211 cushion the left and right. It is engaged with and supported by the side side frames 111, 111.
  • the inner portions 1211e and 1211e of the supporting cloths 121 and 121 are also formed in a loop shape and cushioned. Cuts 1211 e 1 and 1211 e 1 are formed at predetermined intervals along the front-rear direction of the frame 110 (see FIG. 6).
  • the inner engagement metal wires 1211 f and 1211 f are inserted into the looped inner portions 1211 e and 1211 e (see FIGS. 4 and 5).
  • the coil springs 1220 and 1220 which are elastic members for the base support portion, have the respective hooks engaged with the inner engagement metal wires 1211f via the notches 1211e1 and 1211e1 which are opposed at predetermined intervals in the front-rear direction of the seat cushion 100. 1211 f is engaged.
  • the two supporting cloths 121 and 121 arranged to be separated from each other in the width direction of the cushion frame 110 are in the vicinity of the width direction center of the cushion frame 110 and plural along the front-back direction of the cushion frame 110
  • the elastic restoring force of the coil springs 1220 and 1220 which are elastic members for the base support portion arranged in this way pulls in a direction (central direction in the width direction of the cushion frame 110) close to each other.
  • the coil springs 1220 and 1220 are located near the widthwise center of the cushion frame 110. Therefore, when a force in the vertical direction is applied due to a load due to the weight of the seated person or vibration during traveling, the coil springs 1220 and 1220 elastically deform in the vertical direction and extend, and an elastic restoring force acts ( 10 and 11). As described above, in the supporting cloths 121 and 1211, the outer side portions 1211c and 1211c are engaged and supported by the left and right cushion side frame 111 and 111, respectively.
  • the positions of the outer portions 1211c and 1211c of the supporting cloths 1211 and 1211 are stabilized, and even if lateral movement or the like is input during traveling, the posture of the seated person in the lateral direction is prevented from being lost .
  • the outer portions 1211c and 1211c of the base support portions 1210 and 1210 supporting fabrics 1211 and 1211
  • the posture is easily broken by an input such as a lateral shake.
  • it may require muscle strength and oxygen to restore it, and may induce sympathetic tone.
  • a plurality of coil springs 1220 and 1220 are disposed in the vicinity of the widthwise center of the cushion frame 110 and along the front-rear direction of the cushion frame 110. Therefore, even if the left and right movements of the seated person are restricted, the elastic deformation of the coil springs 1220 and 1220 in the vertical direction does not cause a cramping feeling. That is, the support cloths 121 and 1211 constituting the base support parts 1210 and 1210 have outer parts in which the inner parts 1211 e and 1211 e to which the coil springs 1220 and 1220 are connected are connected to the cushion side frames 111 and 111. It is a rotation free end centering on 1211c and 1211c.
  • the base support portions 1210 and 1210 are connected via the coil springs 1220 and 1220, the front belt-like member 1231, the rear belt-like member 1232, and the connecting elastic member 1233, and can move up and down, back and forth, and left and right.
  • the front portion 1211a, the rear portion 1211b, and the inner portion 1211e of the support cloths 121 and 121 are free to rotate, and can move in six degrees of freedom around a site corresponding to a ischial tube in the base supports 1210 and 1210. .
  • the coil springs 1220 and 1220 are disposed in the vicinity of the widthwise center of the cushion frame 110, the vicinity of the trunk of the seated person is supported by a rigid member.
  • the ability to follow the sense of unity, that is, displacement, between the movement of the coil springs 1220 and 1220 and the movement of the seated person on the seat surface is enhanced.
  • the motions of the coil springs 1220 and 1220 are in opposite phase and damped, but because the sense of unity with the seated person is high, the vibrations transmitted to the seated person are similarly damped .
  • Buffer members 1212 and 1212 are disposed on the supporting cloths 121 and 121, respectively.
  • the buffer member 1212 is a three-dimensional cloth having substantially the same shape as the support cloth 1211 as shown in FIG. 4 to FIG. 6, preferably, JP-A-2002-331603, JP-A-2003-182427, etc.
  • a three-dimensional three-dimensional structure is disclosed having a pair of ground knitted fabrics arranged apart from each other and a large number of connecting yarns reciprocating between the pair of ground knitted fabrics to connect them. Constructed using a knitted fabric (three-dimensional three-dimensional knitted fabric).
  • the three-dimensional solid knit fabric is stretched when stretched at 0% and pressed almost perpendicularly to the surface direction-load when pressed with a compression plate with a diameter of 30 mm as a spring constant determined from deflection characteristics- It is characterized in that the spring constant obtained from the load-deflection characteristics when pressurized with a compression plate having a diameter of 98 mm is higher than the spring constant obtained from the deflection characteristics.
  • This property is a property close to the load-deflection property of human muscle, and using a three-dimensional solid knit is characteristically that the muscle layer becomes thicker at the relevant site, which is less uncomfortable and fit It is possible to increase the feeling and improve the attitude supportability.
  • the characteristics of the three-dimensional three-dimensional knit can be variously adjusted depending on the size and shape of the stitches of the ground knit, the arrangement density of the connecting yarn, the material of the yarn, and the like.
  • the buffer members 1212 and 1212 are disposed at predetermined intervals on the support cloths 121 and 121 via the coil springs 1220 and 1220 disposed at the center as described above, and each buffer member 1212 and 1212 is a seat occupant's It is provided to be in a range including the position corresponding to the left and right ischial tuberosities. Although it supports the part corresponding to the ischial tubercle, since the three-dimensional three-dimensional knit has such a characteristic close to the characteristic of human muscle, the pressure relieving effect on the ischial is high.
  • the buffer member 1212 can be fixed to the support fabric 1211 by, for example, sewing or the like.
  • the fixing means is not limited to this, and may be attached via a surface fastener as in the third embodiment described later.
  • a three-dimensional fabric is used as the supporting fabric 1211, for example, when using the above-described three-dimensional three-dimensional knitted fabric, as shown in FIGS. 8A and 8B, the three-dimensional three-dimensional knitted fabric is used.
  • the two-dimensional fabric 12111 having the two-dimensional fabric and the two-dimensional fabric 12112 having the notch 12112a are attached by sewing or the like.
  • the coil spring 1220 can be engaged with the notch 12111a of the two-dimensional fabric 12111 corresponding to the inner side.
  • the seat cushion base layer 120 includes the base supports 1210 and 1210 and a plurality of coil springs 1220 and 1220 which are elastic members for the base support, as shown in FIG. 1, FIG. 5 and FIG.
  • a protective fabric 1240 may be provided.
  • the protective fabric 1240 is stretched between the two base supports 1210 and 1210 so as to cover the upper portions of the coil springs 1220 and 1220, whereby the seat cushion cushion layer on the seat cushion base layer 120 is provided. Direct contact of the coil springs 1220 and 1220 with 130 can be prevented.
  • the seat cushion cushion layer 130 is configured to have the cushion layer pad 131 and the skin material 132.
  • the cushion layer pad 131 is disposed on the seat cushion base layer 120 described above, and the front edge and the rear edge are supported on the front edge frame 112 and the rear edge frame 113, respectively. Further, both side edges are also supported by the cushion side frames 111, 111, respectively.
  • the cushion layer pad 131 can be made of foamed polyurethane or the like, but the above three-dimensional knitted fabric can also be used.
  • the surface material 132 is not particularly limited, and is made of genuine leather, synthetic leather, fabric, or a three-dimensional three-dimensional knitted fabric or the like, and is disposed to cover the cushion layer pad 131. Further, it is of course possible to make the seat cushion cushion layer 130 only of a three-dimensional three-dimensional knitted fabric which is stretched over the cushion frame 110 with a predetermined tension.
  • the seat back 200 includes a back frame 210, a seat back base layer 220, and a seat back cushion layer 230 (see FIG. 1).
  • the back frame 210 has left and right back side side frames 211 and 211 arranged at predetermined intervals in the width direction of the seat back 200, and the lower portions of the left and right back side side frames 211 and 211 are cushion frames 110. It connects with the back of the cushion side frame 111,111 on either side which comprises these through the reclining mechanism part 300.
  • a headrest frame 212 formed in a substantially reverse U-shape is connected between upper portions of the left and right back side frame 211, 211. Further, a lower frame 213 is bridged between the lower portions of the left and right back side frame 211, 211 (see FIG. 4).
  • the seatback base layer 220 is configured to include a seatback base fabric 2210 and a lumbar support 2220 as shown in FIGS. 1, 4 and 7.
  • the seatback base fabric 2210 has a width corresponding to the distance between the left and right back side frames 211 and 211 from a two-dimensional fabric or a thin three-dimensional fabric (for example, a three-dimensional three-dimensional knit fabric).
  • the length is longer than the length in the vertical direction of 2220 and has a size that covers between a frame disposed closer to the upper portion of the back frame 210 and a frame disposed closer to the lower portion.
  • a headrest auxiliary frame 212b spanned between the end portions 212a and 212a of the headrest frame 212, and a lower frame 213 serving as a frame disposed closer to the lower portion
  • a substantially rectangular shape having a length along the vertical direction corresponding to the distance between
  • the upper edge 2211 is engaged with the headrest auxiliary frame 212b, and the side edges 2212 and 2212 are disposed engaged with the left and right back side frames 211, 211.
  • 7 shows an example in which a two-dimensional fabric is used as the seatback base fabric 2210.
  • a three-dimensional fabric for example, a three-dimensional three-dimensional knitted fabric, as shown in FIG.
  • the two-dimensional fabrics 2211 and 22122 are attached to the side edges of the seatback base fabric 2210 by sewing or the like, and engaged with the left and right back side frames 211 and 211 via these.
  • the lumbar support 2220 is disposed on the back surface side of the seatback base fabric 2210 in the vicinity corresponding to the waist of the seated person, that is, in the lower part than the approximate center of the seatback base fabric 2210 in the longitudinal direction (vertical direction). (See Figure 1).
  • the lumbar support 2220 includes a lumbar support fabric 2221 and a lumbar coil spring 2222 which is a spring member that elastically supports the lumbar support fabric 2221 (see FIGS. 4 and 7).
  • the lumbar support fabric 2221 is formed of a two-dimensional fabric or a thin three-dimensional fabric (for example, a three-dimensional three-dimensional knit fabric), and the side edges thereof are engaged with one end of a lumbar coil spring 2222.
  • the other ends of the lumbar coil springs 2222 are engaged with the left and right back side frame 211, respectively.
  • the elastic force of the lumbar coil spring 2222 urges the lumbar supporting fabric 2221 forward, so that the lower part of the seatback base fabric 2210 located in front of that is also lower than the approximate center of the longitudinal direction (vertical direction) of the seatback base fabric 2210 It is biased forward.
  • the vicinity of the waist of the seated person is supported at a predetermined support pressure.
  • the seatback cushion layer 230 is supported by the back frame 210 so as to cover the seatback base layer 220.
  • the seatback cushion layer 230 is formed of a three-dimensional three-dimensional knitted fabric and is stretched on the back frame 210.
  • the seatback cushion layer 230 can be configured using a pad made of foamed polyurethane or the like and a skin material that covers the surface of the pad.
  • the seat cushion 100 and the seat back 200 have the following characteristics.
  • the ratio of the forward path area (a1) in the range including the forward path curve to the return path area (b1) in the range including the backward path curve is set as the load characteristic area ratio (b1 / a1) of the seat cushion 100
  • the ratio of the forward path area (a2) of the range including the forward path curve to the return path area (b2) of the range including the backward path curve is the load characteristic area ratio of the seatback 200 (b2 / a2), (B1 / a1)> (
  • the above-mentioned forward path areas a1 and a2 and return path areas b1 and b2 are taken as an example of the data of B000 in FIG.
  • the forward path areas a1 and a2 refer to areas in the range corresponding to the solid line hatching a in FIG. 16, and the return path areas b1 and b2 correspond to the dashed line hatching b in FIG.
  • FIG. 12 shows load-deflection characteristics of a vehicle seat 1A of this embodiment (Test Example 1, Test Example 2) and a general driver seat (comparative example) mounted on a commercially available passenger car. It is the figure which showed the relationship.
  • the vehicle seat 1A of the present embodiment was prepared in two types, Test Example 1 and Test Example 2.
  • Test Example 1 a three-dimensional three-dimensional knitted fabric (manufactured by Asahi Kasei Co., Ltd.) is used as the support fabric 1211 constituting the base support 1210 of the seat cushion base layer 120 of this embodiment and the seatback base fabric 2210.
  • Test Example 2 a two-dimensional fabric is used as the supporting fabric 1211 of the base support 1210 and the base fabric 2210 for the seat back.
  • the lumbar supporting fabric 2221 uses a two-dimensional fabric in each of Test Example 1 and Test Example 2.
  • the other configurations of Test Example 1 and Test Example 2 are exactly the same.
  • a seat cushion spring made of an S spring supported by a cushion frame is disposed in place of the seat cushion base layer 120 of the present embodiment.
  • a seatback spring composed of an S spring supported by the back frame 210 is disposed.
  • the configurations of the seat cushion cushion layer 130 and the seatback cushion layer 230 are the same as in Test Example 1 and Test Example 2.
  • the position at which the load-deflection characteristics of the seat cushion 100 are measured is the measurement point (C000) at a position about 100 mm forward (a position corresponding to the seated person's ischial tube) from the intersection of the seat cushion 100 and the seat back 200 It is a measurement point (C100) of 100 mm ahead, and a measurement point (C200) of 100 mm ahead of C100.
  • C000, C100 and C200 align the center of the pressure plate with a diameter of 200 mm at the center position of the seat cushion 100 in the width direction, and pressurize in the thickness direction (vertical direction) of the seat cushion 100 under the above conditions did.
  • the position at which the load-deflection characteristic of the seat back 200 was measured is the central position in the height direction of the lumbar supporting fabric 2221 (a position about 100 mm above the intersection of the seat cushion 100 and the seat back 200: B000) It is a measurement point (B100) of 100 mm, and a measurement point (B200) of 100 mm further above B100.
  • B100 measurement point
  • B200 measurement point
  • both of Test Example 1 and Test Example 2 have a relationship of (b1 / a1)> (b2 / a2). That is, the area ratio of the seat cushion 100 is larger than that of the seat back 200, and the seat cushion 100 has a structure in which the spring characteristics are more important than the seat back 200. This is because in the seat cushion base layer 120, a plurality of coil springs 1220 and 1220 are disposed in the vicinity of the center to bias the base supports 1210 and 1210 on both sides toward the center.
  • the seat back 200 has a structure with relatively high damping characteristics, and has high dispersibility of body pressure.
  • the spring characteristic is relatively high in the seat back 200 due to the elasticity of the lumbar coil spring 2222 of the lumbar support 2220.
  • the sense of unity with the vehicle seat 1A is enhanced in the range from the buttocks to the waist of the seated person, and the resonance frequency is increased to the internal resonance frequency. It can be avoided and vibration absorption characteristics can be enhanced, head shaking can be suppressed, and a feeling of stiffness in the buttocks can be reduced.
  • the damping characteristic of the seat back 200 is high, particularly in the vicinity of the chest above the lumbar support 2220, the supporting pressure and the restraining force of the seated person are not high. Therefore, it does not disturb the movement of the central part of the trunk in the range from the pelvis to the chest accompanying breathing. Therefore, the seat back can easily follow the slight movement of the pelvis to the chest accompanying breathing, and can promote comfortable breathing. That is, in this embodiment, the spring characteristics of the seat cushion 100 centering on the coil springs 1220 and 1220, and the cushion frame 110 of the outer portions 1211c and 1211c of the base support portions 1210 and 1210 (supporting fabrics 1211 and 1211). A stable sitting posture can be maintained, and comfortable breathing can be easily secured, by the suppression of posture collapse in the left and right direction by the connection support and the low restraint property of the seat back 200 in the vicinity of the chest.
  • the two load characteristic area ratios are substantially equal. Slightly, the relationship of (b1 / a1) ⁇ (b2 / a2) opposite to that of the test examples 1 and 2 is established. That is, the difference in characteristics between the seat cushion and the seat back is small, or the seat back has a configuration in which the spring characteristics are more important. Therefore, it can be said that the structure of the seat back is not sufficient, the support of the back of the seated person is unstable and swaying easily, and the stroke of the seat back is large and the seated person tends to be a cat back.
  • Test Example 1 and Test Example 2 are compared, from FIG. 16 and FIG. 17, Test Example 1 employing a three-dimensional three-dimensional knit fabric has a hysteresis loss compared to Test Example 2 employing a two-dimensional fabric. And the spring constant of the equilibrium point at B200 above the lumbar support 2220 is lower in Test Example 1. Therefore, it can be said that Test Example 2 is higher in the supportability of the entire back of the seated person, but in the case of Test Example 1, it can be said that vibration absorption and body pressure dispersion are more excellent.
  • the load characteristic area ratio is adjusted to the above (b1 / a1) by adjusting the elastic force of the coil springs 1220 and 1220 and the number of the coils 1220 and 1220. It is preferable to have the relationship of (b2 / a2) and to make the difference 3% or more. If the difference in load characteristic area ratio is too large, the spring characteristics of the seat cushion 100 become too high, so the difference between the two is preferably in the range of 3 to 15%, and more preferably in the range of 5 to 10%. Is more preferred.
  • the spring constant of the load-deflection characteristic of the seat back 200 is 15000 N / m at the spring constant of the equilibrium point (320 N in the case of FIGS. 16 and 17). Or more, and more preferably in the range of 15000 to 20000 N / m.
  • the spring constant of the equilibrium point falls below the above range, particularly when the spring constant of the equilibrium point at B200 above the lumbar support 2220 falls below the above range, The support is insufficient and the trunk is easily shaken.
  • FIG. 19 shows the vehicle seat 1A of Test Example 1 and Test Example 2 and the vehicle seat of Comparative Example set on a uniaxial shaker and sitting with a subject weighing 75 kg, peak-to-peak amplitude 2 mm, Log sweep: a graph showing the vibration transmission rate when vibrating at 0.5 to 15 Hz.
  • the resonance frequency is lower than that of the comparative example. Also, in all cases, the resonant frequency is less than 5 Hz, which is lower than the visceral resonant frequency, and in the high frequency region of 7 Hz or more, the vibration transmissibility is 1 or less in both Test Example 1 and Test Example 2. Is also excellent in terms of vibration transfer characteristics.
  • FIG. 20 is an exploded perspective view of the vehicle seat 1B according to the second embodiment of the present invention in which the seat cushion cushion layer 130 and the seatback cushion layer 230 are omitted.
  • the lumbar support 2220 includes a lumbar planar support 2223 in addition to the lumbar support fabric 2221 and the lumbar coil spring 2222 as in the first embodiment.
  • the lumbar planar support material 2223 has a predetermined area having a length equal to or less than the substantially central portion in the longitudinal direction (vertical direction) of the seatback base fabric 2210 and having a width that fits between the left and right back side frames 211, 211.
  • the lumbar planar support member 2223 is disposed between the seatback base fabric 2210 and the lumbar supporting fabric 2221. Therefore, the lumbar supporting fabric 2221 is urged forward by the action of the restoring force of the lumbar coil spring 2222, so that the lumbar planar support member 2223 located in front of the lumbar supporting fabric 2221 is also urged forward.
  • the lumbar planar support member 2223 is formed of a synthetic resin as described above, and has a higher rigidity and a larger area than the lumbar supporting fabric 2221 and a slightly curved shape. Fit in and firmly support. Thereby, the sense of unity with the range from the buttocks to the waist of the seated person and the vehicle seat 1B is further enhanced, and the vibration absorbing characteristics can be enhanced.
  • the other configurations, actions, and effects are completely the same as in the first embodiment.
  • Third Embodiment 21 to 31 are views for illustrating a vehicle seat 1C according to a third embodiment of the present invention.
  • the third embodiment has the same configuration as the second embodiment in that it has a planar support member for lumbars 2223, but the specific structure of the planar support member for lumbars 223 is the second embodiment. It is different from In addition, the specific structure of the buffer member 1212 constituting the base support portion 1210 of the seat cushion base layer 120 is also different from the first and second embodiments. The other configuration is the same as in the first and second embodiments.
  • the buffer member 1212 constituting the base support portion 1210 is configured to have an outer pad member 1212a, an inner pad member 1212b, and a cover member 1212c.
  • the outer pad member 1212a is formed in a substantially rectangular frame shape, and an inner pad member 1212b substantially rectangular in a plan view is disposed in the inner space thereof.
  • the cover member 1212c is made of, for example, two plastic films, and after disposing the inner pad member 1212b in the outer pad member 1212a, the cover member 1212c covers the front and back surfaces of the inner pad member 1212b. It is stuck and arrange
  • the outer pad member 1212a is preferably made of, for example, a plate-shaped bead foam.
  • the foaming ratio be in the range of 25 to 50 times and the thickness be equal to or less than the average diameter of the beads.
  • the thickness be cut to about 3 to 5 mm.
  • the inner pad member 1212 b is configured using a three-dimensional fabric, preferably the above-described three-dimensional knitted fabric.
  • the inner pad member 1212b is slightly thicker than the outer pad member 1212a, and the cover member 1212c is preferably in close contact with the surface of the inner pad member 1212b.
  • micro-vibrations such as biological signals transmitted through the cover member 1212 c easily resonate the yarns and fibers of the three-dimensional three-dimensional knitted fabric constituting the inner pad member 1212 b.
  • the outer pad member 1212a is also slice-cut with the thickness as described above and given a soft elasticity, so that it becomes easy to amplify the micro-vibration.
  • the buffer member 1212 when the buffer member 1212 according to the present embodiment arranges a sensor (microphone sensor or the like) (not shown) between the three-dimensional knitted fabric as the inner pad member 1212 b and the cover member 1212 c, the present applicant
  • the configuration is the same as that of the biological signal detecting device disclosed in the publication 152,242, and the biological signal transmitted through the buttocks of the seated person can be captured and used for analysis of the living condition of the seated person.
  • the buffer member 1212 can be fixed to the supporting fabric 1211 via, for example, a surface fastener 1213 (see FIG. 24B, FIG. 25).
  • the surface fastener 1213 comprises a pair of hook and loop sides, one of which is attached to the opposite surface of the cushioning member 1212 and the other of which is attached to the opposite surface of the support fabric 1211.
  • the fixing means is not limited to this, and it is possible to adopt sewing, bonding, etc. However, by using the surface fastener 1213, the attachment position of the buffer member 1212 can be finely adjusted back and forth and right and left .
  • a two-dimensional fabric or a three-dimensional fabric can be used as the supporting fabric 1211 as in the first embodiment, and in the case of using a three-dimensional fabric such as a three-dimensional knitted fabric, as shown in FIG.
  • a two-dimensional fabric 12111 having notches 12111a and a two-dimensional fabric 12112 having notches 12112a on both sides of a supporting fabric 1211 made of a three-dimensional three-dimensional knit fabric. are attached and arranged by sewing etc.
  • the lumbar planar support member 2223 has a length equal to or less than a substantially central portion in the longitudinal direction (vertical direction) of the seatback base fabric 2210, and a width that fits between the left and right back side frames 211, 211. And a plate-like lumbar bead foam 2223a of a predetermined area. As shown in FIG. 21, FIG. 26 and FIG. 28, two substantially rectangular holes 2223a1 are formed in the lumbar bead foam 2223a on both sides of the center in the width direction. In each of the three-dimensional knitted fabrics 2223 b are disposed.
  • a cover member 2223c made of a plastic film is applied to the front and back surfaces of the lumbar bead foam 2223a so as to cover the front and back surfaces of the three-dimensional knitted fabric 2223b.
  • the configuration of the lumbar planar support member 2223 is the same as that of the buffer member 1212 used in the seat cushion 100 except for the size and the number of three-dimensional knitted fabrics arranged, and the lumbar bead foam 2223a, three-dimensional Preferred examples of the three-dimensional knitted fabric 2223b and the cover member 2223c are the same as the bead foam constituting the above-mentioned outer pad member 1212a, the three-dimensional three-dimensional knitted fabric constituting the inner pad member 1212b and the plastic film constituting the cover member 1212c.
  • a sensor microphone sensor
  • the lumbar planar support member 2223 is disposed between the seatback base fabric 2210 and the lumbar supporting fabric 2221 (see FIGS. 21 and 23). Therefore, the lumbar supporting fabric 2221 is urged forward by the action of the restoring force of the lumbar coil spring 2222, so that the lumbar planar support member 2223 located in front of the lumbar supporting fabric 2221 is also urged forward. Thus, the vicinity of the waist of the seated person is supported at a predetermined support pressure. Although this point is the same as that of the second embodiment, in the present embodiment, because it has a bead foam 2223a for lumbar and a three-dimensional three-dimensional knit 2223b like the buffer member 1212 used in the seat cushion 100.
  • the load characteristics of human muscles are the same as those described above, and the fit feeling can be increased, and the posture support can be improved.
  • a three-dimensional fabric such as a three-dimensional three-dimensional knit fabric is used as the seatback base fabric 2210
  • two-dimensional fabrics 2211 and 22122 may be sewn or the like at each side edge as in the first embodiment. Attach and engage with the left and right back side frame 211, 211 via these (see FIG. 9).
  • the buffer members 1212 and 1212 are not only the inner pad member 1212b made of a three-dimensional solid knit but also the outer pad member 1212a made of bead foam around it. , And they are integrated by the upper and lower cover members 1212c and 1212c, and an air layer is formed between the upper and lower cover members 1212c and 1212c.
  • the buffer function by the air layer acts to disperse and relieve the load applied to the center of the ischial tube more efficiently than the above embodiment.
  • the outer pad member 1212a from bead foam, the collar portion of the seated person is supported by the hard and rigid surface of the bead foam, so that the foreign body feeling of the coil springs 1220 and 1220 disposed at the center Transmission can be suppressed.
  • the left and right base support portions 1210 and 1210 are cushion side frames on the left and right sides of the support cloths 121 and 121, respectively. It is engaged with and supported by 111 111 and supported by the front edge frame 112 and the rear edge frame 113 by the front band member 1231 and the rear band member 1232. Therefore, the weight of the seated person is applied as a reaction force to the cushion frame 110, and the balance between the spring force and the frictional force for the distributed load and the opposite phase for the high frequency input reduces the acceleration returning to the seated person Do.
  • a connecting elastic member 1233 consisting of a coil spring connecting the front belt-like member 1231 and the rear belt-like member 1232, and a widthwise center which connects the left and right supporting fabrics 1211 and 1211 and can also be displaced vertically.
  • a plurality of coil springs 1220 and 1220 disposed in the vicinity exert a spring force on any input in the longitudinal direction, the lateral direction and the vertical direction.
  • an outer pad member 1212a, an inner pad member 1212b, a cover member 1212c, and the like as the buffer member 1212 are stacked on the supporting fabric 1211, and even a slight displacement occurs due to vibration among them as well. Will occur.
  • the acceleration is reduced by the reverse phase to the high frequency input by the spring force and the friction force.
  • the low frequency input is a tension structure supported by the cushion frame 110, the support fabric 1211, the buffer member 1212, the coil spring 1220, the front strip member 1231, the rear strip member 1232, and the connection elastic member 1233 It becomes energy for moving etc., and is converted to frictional heat and attenuated.
  • These actions are the same as in the other embodiments, but as the number of laminated layers of the members constituting the tension structure such as the support fabric 1211 increases, the vibration absorption characteristics become more strongly damped.
  • FIG. 32 is a graph showing the result.
  • the resonance frequency is less than 5 Hz lower than the internal resonance frequency. This point is the same as in the comparative example, but in the high frequency region of 7 Hz or more, the vibration transfer coefficient in the test example 3 is 1 or less, which is superior to the comparative example in the vibration transfer characteristic.
  • Fourth Embodiment 33 to 37 are views for explaining a vehicle seat 1D according to a fourth embodiment of the present invention.
  • the lumbar support 2220 does not employ the lumbar planar support member 2223 of the third embodiment, that is, the lumbar support fabric 2221 and the lumbar support fabric 2221 are supported on the back frame 210.
  • the lumbar coil spring 2222 is used. That is, the lumbar support 2220 of the fourth embodiment has the same structure as the lumbar support 2220 of the first embodiment.
  • the seatback base fabric 2210 is supported by the back frame 210 so as to be located on the front surface of the lumbar support 2220, as in the first embodiment.
  • the sheet-back planar support member 2230 is newly disposed between the back cushion layer 230 and the front surface of the seatback base fabric 2210.
  • the other structure except the above points is the same structure as the vehicle seat 1C according to the third embodiment, and the details thereof will be omitted.
  • FIG. 33 to FIG. 37 the same members as those in the third embodiment are given the same symbols.
  • the seatback planar support member 2230 employed in the present embodiment is configured to include a seatback base fabric 2210 and a lumbar support 2220.
  • the length along the vertical direction of the seatback planar support member 2230 is approximately the same as the seatback base fabric 2210, and has a length substantially corresponding to the distance between the headrest auxiliary frame 212b and the lower frame 213. ing.
  • the width is formed to be narrower than the seatback base fabric 2210 having a width corresponding to the distance between the left and right back side frames 211, 211. That is, the seatback planar support member 2230 has an area covering a range from the vicinity of the boundary between the seatback 200 and the seat cushion 100 to the headrest auxiliary frame 212b located at the lower portion of the headrest frame 212. Widely support from the pelvis to the upper back of the seated person, including the range supported by the
  • the structure of the planar support member 2230 for a seat back is the same as the planar support member 2223 for a lumbar used in the third embodiment except for the dimensions.
  • the seat back bead foam 2231, the three-dimensional three-dimensional knit 2232, and the cover member 2233 are configured.
  • the seatback bead foam 2231 has an area ranging from the pelvis of the seated person to the upper back. As shown in FIG. 35, when viewed from the side, the area around the chest is slightly curved backward, and the portion corresponding to the lumbar support 2220 is shaped so as to draw a loose S-curve so as to be curved forward. The fit to the spine is high.
  • FIGS. 36 and 37 two substantially rectangular holes on both sides of the center of the width direction of the bead foam for seat back 2231 at the position corresponding to the lumbar support 2220. 2231a and 2231a are formed, and a three-dimensional knitted fabric 2232 is disposed in each of the holes.
  • the cover member 2233 is made of a plastic film, covers the front and back surfaces of the three-dimensional knitted fabric 2232, and is stuck to the front and back surfaces of the bead foam for seat back 2231.
  • the seatback planar support member 2230 since the seatback planar support member 2230 has substantially the same size as the seatback base fabric 2210, the seat occupant's back is from the upper pelvis to the upper back (near the shoulder) The supporting force is higher than the above embodiments. In particular, in the range above the lumbar support 2220, since the seatback planar support member 2230 is present, higher damping characteristics can be exhibited.
  • a three-dimensional three-dimensional knitted fabric 2232 disposed between the cover members 2233 is provided on the front surface, and an air layer is provided between the cover members 2233. Since it is also formed, it is the same as the planar support member 2223 for lumbars of the third embodiment in that the elasticity of the three-dimensional knitted fabric 2232 and the air layer acts, and in particular, the range of the seated person near the body side. It is possible to achieve high load dispersion and to increase fit and to improve posture supportability.
  • the position for the seatback cushion layer 230 is closer to the seatback sheet-like support member 2230 including the three-dimensional solid knit 22232 and the cover member 2233 than the lumbar sheet-like support member 2223 of the third embodiment. Since it arrange
  • the three-dimensional three-dimensional knitted fabric has characteristics close to the characteristics of human muscle as described above, the effect of relieving pressure applied to the sciatic is high.
  • the spring characteristic is relatively high in the seat back 200 due to the elasticity of the lumbar coil spring 2222 of the lumbar support 2220.
  • the sense of unity with the vehicle seat 1D is enhanced in the range from the buttocks to the waist of the seated person.
  • the vehicle seat 1D maintains displacement followability by using a spring system (coil spring) with little hysteresis loss, approximates the load-deflection characteristics of human muscles, and has a cubic rigidity with surface rigidity to support human weight
  • a spring system coil spring
  • an original fabric preferably a three-dimensional knitted fabric
  • the seat cushion cushion layer 130 and the seatback cushion layer 230 are provided in a tension structure in which the cushion frame and the back frame are respectively stretched.
  • FIG. 38 shows a back frame of a seat used for SUVs of domestic cars and European cars and a high rigidity frame adopted as a back frame of a vehicle seat 1D according to a fourth embodiment used in an experiment described later It is the graph which compared rigidity.
  • the stiffness measurement was performed by measuring the displacement when a load of 500 N was applied to a point on the back frame at a height of 403.4 mm from the hip point (H.P.).
  • the high rigidity frame is particularly high in the longitudinal direction. This high rigidity frame was adopted as a back frame, and each component according to the fourth embodiment was equipped, and an experiment was conducted.
  • the accelerometer uses a Rion seat acceleration pickup PV-62, and the platform acceleration uses a Rion acceleration pickup PV-85.
  • the subjects are four healthy men from their 20s to 50s.
  • the subject's weight is in the range of 50-80 kgf and the height is in the range of 150-180 cm.
  • FIGS. 40 (a) to (c) and FIGS. 41 (a) and (b) show experimental results of transient responsiveness of a subject having a weight of 60 kgf.
  • v is the natural angular frequency
  • the damping ratio of the non-repulsive 3D net sheet was close to this.
  • the settling time is 0.62 sec for commercial car seats with strong springiness (Fig. 40 (c)), and the settling time is 1 sec for shaking at 5 Hz and 0.1 Gp-p, which starts to perceive a bullish feeling The time can be reduced to about half as compared to 1.29 sec of the commercial car seat (FIG. 40 (b)).
  • FIG. 42 (a), (b) is a transient response experiment result of the test subject whose body weight is 77 kgf.
  • the phase difference is very small, about 20 ms, relative to the platform of the exciter, and it can be said that a sense of unity of the human car is created.
  • FIGS. 43 (a) and 43 (b) show the body pressure distribution of a subject weighing 71 kgf.
  • a commercial car seat is in contact with the body in a wide range.
  • the strength and weakness of the body pressure is small, giving a feeling of discomfort to the body.
  • the body in the non-repulsive 3D net sheet, the body is supported around the side of the body around the spine.
  • the body side support is a support suitable for long time sitting to ease breathing, and leads to the effective suppression of the occupant's fatigue.
  • the configuration of the cushion layer of the seat cushion is a urethane material adopted for commercial vehicle seats, and by examining the damping characteristics of the entire vehicle seat by investigating the damping characteristics of the seat back, it is examined saw.
  • “Genuine Seat (G sheet)” refers to a commercially available car (genuine) seat, and as a back base layer that constitutes a cushion layer of the seat back, FIG.
  • a planar spring member in which both sides have a comb shape may be employed.
  • “Remodeling A seat (RA sheet)” arranges a two-dimensional knit covering the surface of a planar spring member of a commercially available car seat, and the two-dimensional knit has side frames On the other hand, it is supported by five right and left coil springs.
  • “Remodeling B seat (RB sheet)” is, as shown in FIG. 44C, a seatback base fabric 2210 which is stretched over the back frame 210 as in the fourth embodiment, as the back base layer 220.
  • a seatback planar support member 2230 having a lumbar support 2220 supported on the side frame by three right and left coil springs is disposed.
  • covers the base layer for backs was made the same structure as said each embodiment altogether.
  • Load-deflection characteristics of the seat and back are measured to know the seat characteristics.
  • load-deflection characteristics an autograph AG-Xplus manufactured by Shimadzu Corporation is used.
  • the damping ratio is obtained by freely dropping a 6.7 kg weight from a height of 20 mm and measuring a free damping waveform.
  • displacement use a laser type displacement sensor LB-01 manufactured by Keyence Corporation.
  • the subjects of the resonance experiment are four healthy Japanese men in their 20s to 50s.
  • the subject's weight is 58 kg to 77 kg.
  • a vertical tooling made by Delta Tooling Co., Ltd.
  • the excitation waveform is a sine wave logarithmic sweep waveform (0.5 to 15 Hz) with an amplitude of 2 mmp-p.
  • the acceleration sensor a piezoelectric acceleration pickup PV-85 (platform acceleration) and a seat vibration pickup (three directions) PV-62 (subject eyelid acceleration) are used.
  • Body pressure distribution is measured using a body pressure distribution measurement system (BPMS system) manufactured by Tekscan.
  • FIG. 45 shows measurement points, where C000 or B000 is near the pelvis of the subject seated on the seat, C100 or B100 is between the hip and thigh or near the waist, C200 or B200 is near the thigh or shoulder It is near the bony part.
  • C000 or B000 is located 100 mm forward or upward from the intersection of the seat cushion and the seat back, and the distance between each point is 100 mm pitch along the surface.
  • the size of the pressure plate is 200 mm in diameter.
  • FIG. 46 (a) shows the load-deflection characteristics of G sheet
  • FIG. 46 (b) shows the load-deflection characteristics of RA sheet
  • FIG. 46 (c) shows the load-deflection characteristics of RB sheet
  • the value of k in the figure is a dynamic spring constant, and the dynamic spring constant is calculated on the assumption that the amplitude is ⁇ 2 mm in the vicinity of the resonant frequency in consideration of the height of the resonance peak and the influence of the hysteresis loss.
  • the load-deflection characteristics of the seatback of the G sheet are substantially uniform from the pelvis and lumbar region to the thoracic spine.
  • the pressure in the vicinity of the fourth lumbar spine which is the center of gravity of the body, is high, the pressure in the upper back is small, and a pressure distribution is shown such that the waist is pushed out.
  • the load-deflection characteristics have a difference in deflection of about 10 mm from the waist to the upper back, and the contact area is increased, but the support distribution is such that the shoulders are dislodged.
  • the RB sheet having the same seatback configuration as the fourth embodiment has a difference in deflection of about 5 mm from the waist to the upper back, and the contact area is increased but the spring constant of the upper back is increased. It is felt as a supportive distribution.
  • the spring constant of the seatback is slightly lower than that of the G-sheet, which is a weak spring constant.
  • the RB sheet has a spring constant higher than that of the RA sheet. In the RB sheet, the support balance of the seat cushion and the seat back is almost balanced, and has a load-deflection characteristic with a margin for external force.
  • FIGS. 47 (a) to 47 (c) show examples of free damping waveforms when a 6.7 kg weight is dropped freely from a height of 20 mm.
  • FIG. 49 shows the damping ratio at B000 of the seatback of G sheet, RA sheet and RB sheet.
  • the damping ratio at C000 of the seat cushions was the same, and the damping ratio ⁇ was about 0.15. Therefore, the seatback of the RB sheet having the same configuration as that of the fourth embodiment can have a higher damping ratio than the seat cushion.
  • FIG. 50 shows the result of superposition of free damping vibrations of the seat cushion and the seat back for the G sheet and the RB sheet.
  • the G sheet since the seat cushion and the seat back have substantially the same damping ratio, the phase difference between the seat cushion and the seat back causes attenuation.
  • the RB sheet is attenuated earlier than the G sheet using the mass of the trunk.
  • FIG. 51 shows the body pressure distributions of a subject A weighing 58 kg and a subject D weighing 77 kg. All subjects showed the same tendency, and the G sheet had a small contact area, and the contact area increased in the order of the RA sheet and the RB sheet. From these results, it can be said that the RB sheet has a structure that easily damps the vibration of the seat cushion using the mass of the upper back.
  • FIG. 52 shows the vibration transfer rate in the vertical direction of each subject seated on these sheets.
  • Subject A showed reduced visceral resonance
  • Subject D showed reduced resonance from the viscera to the chest.
  • the reduction site varies depending on the subject, it can be seen that the RB sheet has improved vibration absorption of the seat cushion as compared to the G sheet.

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Seats For Vehicles (AREA)

Abstract

La présente invention vise à améliorer des caractéristiques d'absorption des vibrations. A cet effet, l'invention porte sur un coussin de siège (100), lequel coussin comporte une couche de base (120) pour un coussin de siège, ayant un élément élastique (1220) pour une partie de support de base qui sollicite deux parties de support de base (1210) dans une direction de rapprochement l'une vers l'autre et qui se déforme élastiquement dans une direction verticale, de façon à procurer ainsi au coussin de siège (100) de bonnes caractéristiques de ressort. Le coussin de siège (100) et un dossier de siège (200) sont configurés de telle sorte qu'un rapport de surface caractéristique de charge est plus grand pour le coussin de siège (100) que pour le dossier de siège (200), ledit rapport étant un rapport d'une surface correspondant à une plage comprenant une courbe de retour à une surface correspondant à une plage comprenant une courbe vers l'avant, les deux plages reliant également le point d'origine, le point de déplacement maximal et le point de charge maximale dans le contexte de caractéristiques d'infléchissement sous la charge prescrites.
PCT/JP2018/039300 2017-10-24 2018-10-23 Coussin de siège pour siège de véhicule et siège de véhicule WO2019082876A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US16/758,311 US11155193B2 (en) 2017-10-24 2018-10-23 Seat cushion for vehicle seat and vehicle seat
EP18871339.0A EP3702210B1 (fr) 2017-10-24 2018-10-23 Coussin de siège pour siège de véhicule et siège de véhicule

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2017205660 2017-10-24
JP2017-205660 2017-10-24
JP2018186176A JP2019077437A (ja) 2017-10-24 2018-09-28 乗物用シートのシートクッション及び乗物用シート
JP2018-186176 2018-09-28

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210101510A1 (en) * 2019-10-04 2021-04-08 Ford Global Technologies, Llc Upper seat back assembly
CN115257487A (zh) * 2021-04-30 2022-11-01 丰田纺织株式会社 交通工具用座椅

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JP2002331603A (ja) 2001-05-10 2002-11-19 Delta Tooling Co Ltd 三次元立体編物、三次元立体編物へのパイル糸の植毛方法、及び三次元立体編物の端末部処理方法
JP2003182427A (ja) 2001-12-20 2003-07-03 Delta Tooling Co Ltd 衝撃吸収構造及び座席構造
JP2004188164A (ja) 2002-03-27 2004-07-08 Delta Tooling Co Ltd 座席構造
JP2005287935A (ja) * 2004-04-02 2005-10-20 Delta Tooling Co Ltd シート構造
JP2011152242A (ja) 2010-01-26 2011-08-11 Delta Tooling Co Ltd 生体信号検出装置
JP2012176330A (ja) 2005-12-28 2012-09-13 Delta Tooling Co Ltd 乗物用シート
JP2013010456A (ja) 2011-06-29 2013-01-17 Delta Tooling Co Ltd 座席構造
JP2016016715A (ja) * 2014-07-07 2016-02-01 トヨタ自動車株式会社 車両用シート
WO2016060270A1 (fr) * 2014-10-16 2016-04-21 株式会社デルタツーリング Mécanisme de support de siège, structure de siège et siège à suspension

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JP2002331603A (ja) 2001-05-10 2002-11-19 Delta Tooling Co Ltd 三次元立体編物、三次元立体編物へのパイル糸の植毛方法、及び三次元立体編物の端末部処理方法
JP2003182427A (ja) 2001-12-20 2003-07-03 Delta Tooling Co Ltd 衝撃吸収構造及び座席構造
JP2004188164A (ja) 2002-03-27 2004-07-08 Delta Tooling Co Ltd 座席構造
JP2005287935A (ja) * 2004-04-02 2005-10-20 Delta Tooling Co Ltd シート構造
JP2012176330A (ja) 2005-12-28 2012-09-13 Delta Tooling Co Ltd 乗物用シート
JP2011152242A (ja) 2010-01-26 2011-08-11 Delta Tooling Co Ltd 生体信号検出装置
JP2013010456A (ja) 2011-06-29 2013-01-17 Delta Tooling Co Ltd 座席構造
JP2016016715A (ja) * 2014-07-07 2016-02-01 トヨタ自動車株式会社 車両用シート
WO2016060270A1 (fr) * 2014-10-16 2016-04-21 株式会社デルタツーリング Mécanisme de support de siège, structure de siège et siège à suspension

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210101510A1 (en) * 2019-10-04 2021-04-08 Ford Global Technologies, Llc Upper seat back assembly
US11027634B2 (en) * 2019-10-04 2021-06-08 Ford Global Technologies, Llc Upper seat back assembly
US11396250B2 (en) 2019-10-04 2022-07-26 Ford Global Technologies, Llc Upper seat back assembly
CN115257487A (zh) * 2021-04-30 2022-11-01 丰田纺织株式会社 交通工具用座椅
CN115257487B (zh) * 2021-04-30 2024-02-13 丰田纺织株式会社 交通工具用座椅

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