JP2017056078A - Vehicular seat pad - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat pad that can readily be manufactured and is excellent in seating feeling and operational stability.SOLUTION: The vehicular seat pad 10 is formed of a soft foam resin material and has multiple holes 18. The multiple holes 18 are formed to a depth range of 65% or more of a thickness in a thickness direction from a side of a seating person supporting surface 12. An occupancy volume of the hole 18 in the depth range where the hole 18 is formed becomes larger as coming close to the seating person supporting surface 12.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle seat pad, and more particularly to a vehicle seat pad formed using a soft foamed resin material.

  In general, a vehicle seat pad is formed using a soft foamed resin material having a high cushioning property, and a seat pad excellent in sitting comfort and maneuverability is desired. On the other hand, in the case of producing a soft foamed resin molded product having a high cushioning property, a product obtained by foam molding in a molding mold and demolding may not be uniform in the thickness direction with respect to hardness.

  It has been recognized that this is due to various factors such as temperature transfer to the material during foam molding and is not a desirable hardness distribution. Therefore, in recent years, adjustment of the hardness of the seat pad such as adjusting the hardness according to the body pressure distribution has been performed.

  In Patent Document 1, the hardness of the foam constituting the seat pad changes in an inclined manner from the front side to the back side, and the bending behavior when a load such as a seating of an occupant is applied is linear, and the seat has high comfort. A pad is disclosed.

Japanese Patent Application No. 2006-149466

  The seat pad of Patent Document 1 has a high degree of comfort because the hardness changes in an inclined manner from the surface to the back side, and the bending behavior when the occupant applies a load such as seating is linear, and the comfort is high. The law is complicated. That is, a first foaming material that exhibits high hardness upon completion of the foaming / curing reaction and a second foaming material that exhibits low hardness upon completion of the curing reaction are prepared, and the first foaming material proceeds with the foaming / curing reaction. The second foaming raw material is injected into the inside, and the hardness is changed in an inclined manner using the specific gravity difference during the reaction of the two foaming raw materials.

  Therefore, it is considered that the material composition is complicated, and it is necessary to pay attention to the injection timing of the foaming raw material, which takes time and is difficult to adjust the hardness.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a seat pad that is easy to manufacture and excellent in sitting comfort and maneuverability.

In order to achieve the above object, the vehicle seat pad according to claim 1 is formed of a soft foamed resin material and has a plurality of gaps.
The plurality of gaps are formed in the thickness direction from the seater support surface side to a depth range of 65% or more of the thickness, and the occupied volume of the gaps in the depth range in which the gaps are formed is , And is set so as to increase as it approaches the seated person support surface.

  With this configuration, the seat pad has a softer area on the side of the seater support surface where the space occupied by the gap is larger. Therefore, the seated person can directly feel the softness, while a harder structure is secured in the deep part, so that both sitting comfort and maneuverability are improved.

  In addition, the range in which the plurality of gaps are formed is a depth range of 65% or more of the thickness in the thickness direction from the seater support surface side (including the entire thickness direction (100%)), That is, it is formed from the seating surface to a sufficiently deep portion. Therefore, not only a light occupant but also a heavy occupant who sinks deeply into the pad can feel the softness of the surface and the sense of stability of the deep part.

  In addition, it is not necessary to use a plurality of materials having different hardness as the material of the seat pad, and the hardness adjustment in the depth direction does not require a complicated configuration, and due to the presence of voids in the soft foam resin material. Since it is only necessary to change the occupied volume of the generated space, there is no difficulty in manufacturing.

  The vehicle seat pad according to claim 2 is the vehicle seat pad according to claim 1, wherein the plurality of gaps are a plurality of bottomed portions formed in the thickness direction from the seater support surface, respectively. It is a hole part or a through-hole, and the said bottomed hole part or through-hole is formed so that an internal diameter may become narrow toward the thickness direction from the said seated person support surface, respectively.

  According to this configuration, the formation of the gap can be easily achieved by the shape of the mold. Also, the adjustment of the occupied volume of the gap in the thickness direction can be easily and precisely adjusted by adjusting the inner diameter of the hole or the through hole.

  The vehicle seat pad according to claim 3 is the vehicle seat pad according to claim 2, wherein the bottomed hole portion is formed deeper in a central region of the seater support surface than a peripheral region thereof. It is characterized by that.

  With this configuration, in addition to the change in the hardness of the seat pad in the depth direction, the change in the hardness in the horizontal direction is synthesized, and the change in the hardness of the seat pad can be obtained in three dimensions. As a result, the seated person can be softly supported at the center and firmly supported around the seated person, and the sitting comfort and the maneuverability of the seated person can be improved more precisely.

  A vehicle seat pad according to a fourth aspect of the invention is the vehicle seat pad according to any one of the first to third aspects, wherein the vehicle seat pad has a communication portion that communicates the plurality of gap portions.

  According to this configuration, while maintaining the effect of improving the seating comfort and maneuverability of the seated person due to the change in the depth direction of the hardness of the seat pad, each gap portion is communicated by the communicating portion, and there is a flexible feeling with a continuous feeling. The air permeability as a whole of the seat pad is also good. That is, when the seated person is seated, air pockets do not occur in the gap portion, and the seated person can perceive the change in the softness of the seat pad more delicately. This makes it possible to more accurately demonstrate the effects of improving maneuverability and ride comfort.

  The vehicle seat pad according to claim 5 is the vehicle seat pad according to any one of claims 1 to 4, wherein the communication portion is formed to open to the seating person support surface. Features.

  As a result, in addition to the operational effects of the configuration according to claim 4, in particular, the overall air permeability of the surface portion of the seater support surface is improved, and the refreshing comfort is maintained even when sitting for a long time. Is possible.

  The vehicle seat pad according to claim 6 is the vehicle seat pad according to any one of claims 2 to 5, wherein the bottomed hole portion or the through hole has a diameter at the seated person support surface. Is 1 to 10 mm. With this configuration, it is possible to obtain a change in hardness without giving a sense of incongruity to the seated person, and it is also possible to accurately adjust the space occupied volume due to the presence of a gap in a limited area called a seat pad. it can. In particular, when the length is less than 5 mm, the seated person does not directly feel the presence of the hole portion or the through hole when sitting, which is more preferable.

  The vehicle seat pad according to claim 7 is the vehicle seat pad according to claim 1, wherein the plurality of gap portions are a plurality of cells, and are arranged in the thickness direction from the seat support surface. The volume and / or density is set to be small.

  According to this configuration, instead of forming a hole or a through hole space extending in the depth direction at the same position of the seat pad, a structure in which cellular voids are distributed in the depth direction is adopted, so that the hardness in the depth direction is reduced. The change in the height becomes smoother and continuous, and it is possible to achieve a comfortable sitting and handling. In addition, the hardness in the depth direction can be adjusted by, for example, gradually reducing the cell size in the depth direction or providing cells of the same size, but gradually increasing the density in the depth direction. It can be done by lowering.

  According to the vehicle seat pad of the present invention, regardless of the body shape or weight of the seated person, the seated person can feel the softness of the surface and the sense of stability of the deeper part, and the seating comfort and the operability Will improve. Further, since the hardness is adjusted by changing the occupied volume of the plurality of gaps in the seat pad, the difficulty in manufacturing is also eliminated.

1 is a schematic plan view of a central region of a seater support surface according to a first embodiment of a vehicle seat pad of the present invention. FIG. 2 is a schematic cross-sectional view taken along the line AA of FIG. 1 according to the first embodiment of the vehicle seat pad of the present invention. FIG. 6 is a schematic plan view of a central region of a seated person support surface according to a second embodiment of the vehicle seat pad of the present invention. FIG. 4 is a schematic cross-sectional view taken along the line BB in FIG. 3 according to the second embodiment of the vehicle seat pad of the present invention. FIG. 6 is a schematic plan view of a central region of a seated person support surface according to a third embodiment of a vehicle seat pad of the present invention. FIG. 6 is a DD schematic cross-sectional view of FIG. 5 according to a third embodiment of the vehicle seat pad of the present invention. FIG. 10 is a schematic plan view of a central region of a seater support surface according to a fourth embodiment of a vehicle seat pad of the present invention. FIG. 9 is a schematic cross-sectional view taken along line EE in FIG. 7 according to a fourth embodiment of the vehicle seat pad of the present invention.

  Embodiments of the present invention will be described in detail below with reference to the drawings.

  FIG. 1 is a schematic plan view of a central region of a seater support surface of a vehicle seat pad according to a first embodiment of the present invention. FIG. 2 is a schematic cross-sectional view taken along the line AA of FIG.

  As illustrated, the seat pad 10 formed of a soft foam material has a seat occupant support surface 12 and a back surface 14 opposite thereto. There are side portions 16 on both sides of the seat occupant support surface 12 in the vehicle width direction, and a groove 20 is provided between the side portion 16 and the seat occupant support surface 12. The seating area is the central area C of the seater support surface 12. The seat pad 10 is covered with a skin material (not shown), but the state before the skin material is covered is illustrated.

  A characteristic feature of the first embodiment is that the plurality of gaps are bottomed holes having a substantially constant depth formed in the seater support surface 12 and have a depth from the seater support surface 12. The wall portion is tapered so that the inner diameter becomes narrower in the direction. Accordingly, the occupied space of the seat pad 10 due to the presence of the plurality of holes 18 is gradually increased in the direction in which the seater support surface 12 approaches.

  In the present embodiment, for example, the diameter of the hole 18 on the seated person support surface 12 is 5 mm and 1.7 mm at the bottom. The depth of the hole 18 is approximately 70% of the thickness of the seat pad. The pitch of the holes 18 is 7.5 mm (125% with respect to the diameter of the holes 18 on the seated person support surface 12).

  In the present embodiment, the formation range in the depth direction of the gap, that is, the depth of the hole 10 is set to 70% of the pad thickness as a suitable value, but is not limited to this. About 65% or more, it can be satisfactorily applied up to 100% which means to penetrate.

  With this configuration, the seat pad 10 is soft in the vicinity of the seater support surface 12 due to a large space occupation volume, and the hardness gradually increases from the front surface to the back surface 14. Therefore, the seated person can feel the softness directly in the vicinity of the seated person support surface 12, and can feel a sense of stability from the hardness in the deep part. Thus, the seated person can feel not only the comfort of sitting but also the ease of handling.

  Moreover, since the hole 18 is formed to a sufficient depth range of 70% of the thickness of the seat pad, it also functions for a seated person with a large physique. Therefore, even when considering the body shape and weight of various seated persons from children to adults, it is possible to provide an effect due to the change in softness in the depth direction. Furthermore, since the diameter of the hole portion 18 on the seated person support surface 12 is 5 mm, a sense of incongruity due to the hole portion 18 is not sensed when sitting.

  The vehicle seat pad 10 can be manufactured without using a special process by removing the mold after foam formation using a synthetic resin foam mold. That is, by forming a plurality of protrusions corresponding to the hole 18 on the cavity surface of the mold, the vehicle seat pad 10 in which the plurality of holes 18 are formed can be easily obtained. The hardness can be easily adjusted by changing the shape of the protrusion.

  FIG. 3 is a schematic plan view of the central region of the seater support surface of the vehicle seat pad according to the second embodiment of the present invention. 4 is a schematic cross-sectional view taken along the line BB in FIG.

  A characteristic feature of the second embodiment is that the plurality of gaps are bottomed holes having a substantially constant depth formed in the seater support surface 12, and the depth from the seater support surface 12. In addition to the wall being tapered so as to narrow in the direction, the diameter of the hole 22 in the seater support surface 12 is large in the central region C, and the diameter is small outward in the left-right direction. It is arranged so that.

  In the present embodiment, the inner diameter of the hole portion 22 is 6.5 mm at the maximum in the central region C, 1.5 mm at the outermost periphery, and is formed so that the inner diameter gradually decreases toward the outside. ing. Further, the inner diameter of the bottom portion is 2.0 mm in the hole portion 22-1 near the center, 1.7 mm in the outer hole portion 22-2, and 0.5 mm in the hole portion 22-6. The taper angle of the hole is determined by the inner diameter of the seater support surface 12, the inner diameter of the bottom, and the depth. In the example described above, the taper angle is different for each hole, but at the bottom to keep the taper angle constant. You may decide the diameter.

  The pitch of the holes 22 is set to a constant 7.5 mm, and the depth of the holes 22 is substantially constant. In the example of the present embodiment, the pitch of the seat pad 10 is approximately 70%. Has been.

  In addition, although not shown in FIG. 3, when the hole portion 22 is also disposed in the vehicle longitudinal direction region of the substantially central region C of the seated person support surface 12, as it spreads outward from the seated person support surface center region C. It is preferable that the inner diameter of the hole 22 is formed so as to be gradually reduced.

  Therefore, the seat pad 10 according to the present embodiment is softer in the vicinity of the surface from the seat support surface 12, that is, from the front surface side to the back surface 14, in the same manner as the operation of the first embodiment. Hardness gradually increases. Therefore, the seated person can feel the softness directly on the seated person support surface 12, and on the other hand, since a hard structure with a more stable feeling is secured in the deep part, good sitting comfort and maneuverability are obtained. It is done. In addition, in the present embodiment, the occupied volume of the plurality of gaps also changes in the horizontal direction. That is, since the seat pad 10 becomes smaller as it spreads outward in the horizontal direction, the seat pad 10 gradually becomes harder as it spreads outward from the central region C of the seater support surface 12. Therefore, in addition to the change in the hardness of the seat pad 10 in the depth direction, the change in the hardness in the horizontal direction is synthesized, and the change in the hardness of the seat pad 10 can be obtained in the three-dimensional direction. Thereby, the improvement of the sitting comfort and maneuverability of the seated person is achieved more accurately and precisely.

  In addition, a tapered hole portion 22 is formed in substantially the same depth (approximately 70% in the present embodiment) throughout the seat pad 10, and the hardness changes toward the depth direction and outward in the horizontal direction. Therefore, regardless of the body shape and weight of the seated person, all seated persons can be provided with the effect of the change in softness in the depth direction and the horizontal direction. Further, the inner diameter of the hole 22 is not excessive and is set to an appropriate size, and the seated person does not feel the hole 22 and feel uncomfortable.

  FIG. 5 is a schematic plan view of the central region of the seater support surface of the vehicle seat pad according to the third embodiment of the present invention. FIG. 6 is a schematic DD sectional view of FIG.

  A characteristic feature of the third embodiment is that the tapered hole 24 formed in the seater support surface 12 has a large diameter in the central region C of the seater support surface 12 and is deep. In addition, it is deeper in the central region C of the seater support surface 12. That is, the hole 24 has an inner diameter that decreases from the central region C toward a peripheral region outward in the horizontal direction, and has a shallow depth. In the present embodiment, the inner diameter of the hole portion 22 is 6.5 mm at the maximum in the central region C, 1.5 mm at the outermost portion in the horizontal direction, and the inner diameter gradually decreases toward the outside. . Further, the depth was set to about 85% of the thickness of the seat pad 10 in the central region C and about 65% at the outermost portion in the horizontal direction. The pitch of the holes 22 is set to a constant 7.5 mm. Furthermore, the diameter of the bottom is 1.7 mm for the holes 24-1 and 24-2, and 0.5 mm for the holes 24-6.

  Further, although not shown in FIG. 5, when the hole portion 24 is disposed in the vehicle longitudinal direction region of the substantially central region C of the seated person support surface 12, the seating person support surface central region C is laterally outward. It is preferable to form the hole 24 so that the inner diameter of the hole 24 gradually decreases and the depth gradually decreases as the width of the hole 24 increases.

  Therefore, in the seat pad 10 according to the present embodiment, the inner diameter and the depth of the hole portion 24 on the seated person support surface 12 are particularly reduced as the hole 24 spreads outward in the horizontal direction from the central region C. In the same manner as in the above embodiment, the repulsive force applied to the seated person from the seat pad 10 is weak in the central region C, and gradually increases in the surrounding area to improve the sitting comfort and the stability of the sitting state. Excellent safety.

  In addition, since the depth of the hole 24 on the seater support surface 12 is deepened in the central region C, the seater can be more effectively softly supported at the center and firmly supported around the seater. Further improvements in seating comfort and handling can be achieved more precisely and reliably.

  FIG. 7 is a schematic plan view of the central region of the seater support surface of the vehicle seat pad according to the fourth embodiment of the present invention. 8 is a schematic cross-sectional view taken along line EE in FIG.

  The characteristic of the fourth embodiment is that the structure of the gap is the same as that of the first embodiment, but the communication portion 30 that communicates each bottomed hole portion 18 is the seater support surface 12. It is that it is formed by providing the groove-shaped recessed part opened in this. That is, the gap portion is a bottomed hole portion 18 having a substantially constant depth and a tapered wall portion formed in the seater support surface 12, but each hole portion 18 is formed in the seater support surface 12. It communicates with the communication part 30 formed by opening. In the present embodiment, the communication portion 30 is configured by a groove having a width of 2 mm and a depth of 5 mm formed in the seated person support surface 12.

  Therefore, in the seat pad 10 according to the present embodiment, in addition to good sitting comfort and maneuverability as in the operation of the first embodiment, air is circulated between the holes 18 by the communication portion 30. Therefore, the air permeability of the entire seat pad 10 is improved. Therefore, when a seated person is seated, even if the hole 18 whose surface is blocked is generated, a state of communication with the other hole 18 is ensured, so that air pockets are prevented from occurring in the gap. be able to.

  As a result, it is possible to sense the comfort of the seat pad 10 due to the change in the softness of the seat pad 10 in the depth direction as described above and the delicate handling.

  In particular, in the present embodiment, since the communication portion 30 is provided in the seated person support surface 12 so as to be opened, air permeability is ensured in the surface portion of the seated person support surface 12, and even in a seated state for a long time. Riding comfort continues.

  In addition, it is suitable for the formation range of this communication part 30 to be formed within 50% of the thickness in the thickness direction from the surface of the seated person support surface 12. That is, it is for ensuring the seating feeling and air permeability by a communicating part, maintaining the effect | action of the seating comfort by the hardness change in a depth direction, and the improvement of maneuverability.

  In addition, this invention is not limited to said embodiment, A various deformation | transformation is possible within the range of the summary of invention. For example, the configuration of the hole portion has been described as an example of the type of the void portion, but it is also possible to use a cellular void portion, and as described above, by changing the size and density of the cell, The softness can be adjusted.

  Moreover, in 1st Embodiment, although the diameter in the seated person support surface 12 of the hole part 18 was 5 mm, you may change within the range of 1-10 mm. Further, the depth of the hole 24 is 70% of the thickness of the seat pad, but if it is 65% or more, the function of the present invention is provided. Further, although the pitch is set to 125% with respect to the diameter of the hole, it can be appropriately selected within a range of 100% to 300%.

  In the second embodiment, the hole diameter is 6.5 mm to 1.5 mm and the pitch is constant 7.5 mm, but the diameter is 1 to 10 mm, depending on the diameter of the hole forming the pitch. It can be changed as appropriate. Furthermore, in the third embodiment, the depth of the hole is changed from 65% to 85% of the thickness of the seat pad, but may be 65% to 100%. If it is set to 100%, the hole portion becomes a through hole. When this through hole structure is adopted, the seat pad has good air permeability as well as good sitting comfort and maneuverability.

  Furthermore, in the present invention, the seat pad may be a seat cushion pad or a seat back pad. That is, in the seat pad, the seat occupant support surface is not limited to the seat portion but can be similarly applied to the backrest portion.

DESCRIPTION OF SYMBOLS 10 Seat pad 12 Seated person support surface 14 Back surface 16 Side part 18, 22, 24 Hole part 30 Communication part C Seated person support surface center area | region

Claims (7)

In a vehicle seat pad formed of a soft foam resin material and having a plurality of voids,
The plurality of gaps are
Formed to a depth range of 65% or more of the thickness in the thickness direction from the seater support surface side,
The occupied volume of the void in the depth range in which the void is formed is
A vehicle seat pad, wherein the vehicle seat pad is set so as to increase as it approaches the seat support surface. The plurality of gaps are
A plurality of bottomed holes or through holes each formed in the thickness direction from the seated person support surface,
The bottomed hole or through hole is
2. The vehicle seat pad according to claim 1, wherein each of the seat pads is formed so that an inner diameter thereof becomes narrower in a thickness direction from the seated person support surface. The bottomed hole is
The vehicle seat pad according to claim 2, wherein a center region of the seater support surface is formed deeper than a peripheral region thereof.   The vehicle seat pad according to any one of claims 1 to 3, further comprising a communication portion that communicates the plurality of gap portions. The communication part is
The vehicular seat pad according to any one of claims 1 to 4, wherein the vehicular seat pad is formed so as to open in the seated person support surface.   The vehicle seat pad according to any one of claims 2 to 5, wherein the bottomed hole portion or the through hole has a diameter of 1 to 10 mm on the seated person support surface.   2. The vehicle according to claim 1, wherein the plurality of gaps are a plurality of cells, and are set so that a volume and / or a density thereof is reduced in a thickness direction from the seated person support surface. Seat pad.

Images