JP2010142528A - Vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To more improve the feeling of sitting while eliminating the need of using a urethane pad member of a seat part of the vehicle seat. <P>SOLUTION: In the vehicle seat, the seat part includes a seat frame formed along an outward form of the seat, a plate resilient member provided between frame parts of the seat frame, and a pad member provided to cover the seat frame and the plate resilient member. The pad member includes a pleat pad integrating a skin only and the thickness of the pleat pad is thickened. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The invention of this application relates to a configuration of a vehicle seat in which a conventional polyurethane pad member can be eliminated.

  In general, a seat for a vehicle is molded (molded) with a urethane pad member such as a foamed polyurethane foam body to a required thickness and assembled to a pipe seat frame. It is assembled by supporting with a stretched wire or a cushion spring such as an S-shaped spring and enclosing the pad member with a trim cover or the like.

  That is, in the conventional general vehicle seat, the cushioning property of the seat is improved by both the cushion-made urethane pad member and the cushion spring. The same applies to the case of the seat back part and the case of the hip seat part (seat cushion part).

  However, the urethane pad member is expensive, and assembling it separately from the pleat bud on the outer skin side also takes time. It also lacks recyclability.

  Therefore, in such a vehicle seat, the molded foam pad that constitutes the seat portion is abolished to reduce material costs and to reduce the assembly man-hour, for example, a frame, There is a structure constituted by a support body made of a number of steel wires bent in a seat seating surface and a side surface shape, and a trim cover that covers the support body (see, for example, Patent Document 1). reference).

JP-A-6-165717

  However, in the case of Patent Document 1, the trim cover is composed of a slab material wadding made of a skin, foam (urethane foam made of low-density connected cells), and a wadding cover made of a nonwoven fabric or the like, In addition, the support body includes a large number of steel wires stretched in parallel in the lateral direction and stretched on the side of the frame, a cord serving as a connecting material for connecting these steel wires, and a frame for connecting the ends of the steel wires. It is composed of lines.

  According to such a structure, the pad member made of urethane can be omitted, the resource can be saved as much, and the assembly man-hour itself can be reduced.

  However, in the case of the same configuration, urethane foam is adopted as the trim cover, and the urethane foam is not completely abolished, and the support is made of a number of steel wires, and each of the supports is composed of It is extremely complicated to bend a steel wire into a shape approximating the shape of the side and seating surface of the seat and to make it elastic so that it has elasticity in the load direction and can function as a conventional pad In addition, the cost is high, the yield of the molding operation is poor, and there is a problem of lack of reliability as a product including support rigidity.

  That is, in the case of the support having the same configuration, since the support is made of steel wire, there is a problem of lack of durability and stability due to long-term use, and attachment is not always easy. In addition, a hard uneven feeling at the time of sitting is left, and there is a limit to thinning the pad member. Therefore, the urethane pad member cannot be completely abolished.

  The invention of this application was made to solve the above-described problems, and the seat portion was provided between the seat frame formed along the outer shape of the seat and the frame portion of the seat frame. It is formed from a plate-like elastic member and a pad member provided so as to cover the seat frame and the plate-like elastic member, and the pad member is only a pleated pad integrated with the skin, and the thickness of the pleated pad It is an object of the present invention to provide a vehicle seat that can secure cushioning properties while completely eliminating a urethane pad member by increasing the thickness.

  In order to achieve the above object, each invention of the present application includes the following effective problem solving means.

(1) Problem solving means of the invention of claim 1 The problem solving means of the invention of claim 1 is that the seat portion is provided between a seat frame formed along the outer shape of the seat and the frame portion of the seat frame. A vehicle seat comprising a plate-like elastic member and a pad member provided so as to cover the seat frame and the plate-like elastic member, and the pad member is only from a pleated pad integrated with a skin Thus, the pleat pad is configured to have a large thickness.

  According to such a configuration, the human body support surface portion that supports the human body via the pad member is formed by the flat surface of the wide plate-like elastic member, and the urethane pad member is omitted. But it ’s not so bad. Accordingly, the urethane pad member can be completely abolished.

  On the other hand, after doing so, the thickness of the pleated pad integrated with the skin is increased, and the pleated pad is formed so as to enclose the seat frame and the plate-like elastic member formed along the outer shape of the seat. By providing, sufficient cushioning is realized.

  Accordingly, it is possible to provide a practical vehicle seat having an effective cushioning property while eliminating the pad member made of urethane and reducing the material and assembly man-hours.

  Further, since a plate-like member is used as the elastic member, the durability is high, and the stability and reliability are high.

(2) Problem solving means of the invention of claim 2 The problem solving means of the invention of claim 2 is an elastic member provided between the frame portions of the seat frame in the structure of the problem solving means of the invention of claim 1 described above. It is characterized in that a high-tensile steel plate is used.

  The high-tensile steel plate has high toughness and tension, and elastically (expands / deforms) deformation with respect to stress acting in a direction orthogonal to the plane, thereby elastically supporting the human body with respect to the seat frame. Therefore, even if the pad member is thinned, the occupant does not feel the unevenness as in the case of a conventional wire or S-shaped spring.

  The high-tensile steel plate is formed with a large number of punching holes (or notch grooves) as necessary, thereby further increasing the degree of elastic deformation and enabling softer support. it can.

  In addition, the degree of elasticity can be controlled arbitrarily and easily depending on the size, shape, number, and installation position of the punching holes (or notch grooves), and can be realized at a very low cost.

(3) The problem solving means of the invention of claim 3 The problem solving means of the invention of claim 3 is the structure of the problem solving means of the invention of claim 2, wherein the high-tensile steel plate is arranged in the front-rear direction or the left-right direction of the seat frame. The extending edge portion is welded and fixed between the frame portions of the seat frame.

  High-strength steel plates are manufactured with sufficient consideration for weldability (HW steel), and their attachment to the seat frame is performed by welding the edges of the high-strength steel plate to the frame portion of the seat frame. Can be realized simply by integrating them.

(4) Problem solving means of the invention of claim 4 The problem solving means of the invention of claim 4 is the configuration of the problem solving means of the invention of claim 1, 2 or 3, wherein the seat portion is a hip seat portion. It is characterized by that.

  According to such a configuration, the action of the problem solving means of the invention of claim 1, 2 or 3 is effectively realized in the hip seat portion of the vehicle seat.

  It should be noted that a large weight is applied to the hip seat portion, and load movement in the front-rear and left-right directions tends to occur.

  Therefore, in order to achieve a stable support force and a uniform elastic distribution with respect to them, the above-described high-tensile steel plates should extend in the front-rear and left-right directions and be elastically supported at the front-rear and left-right positions. It is preferable to do so.

(5) Problem solving means of the invention of claim 5 The problem solving means of the invention of claim 5 is the structure of the problem solving means of the invention of claim 1, 2, or 3, wherein the seat portion is a seat back portion. It is characterized by that.

  According to such a configuration, the operation of the problem solving means of the invention of claim 1, 2 or 3 is effectively realized in the seat back portion of the vehicle seat.

  As a result of the above, according to the invention of this application, a seat for a vehicle having a good seating feeling is provided while eliminating the pad member made of urethane and reducing the number of assembling steps and reducing the cost as much as possible. It becomes possible.

  FIGS. 1-6 has shown the structure of the vehicle seat which concerns on best embodiment of invention of this application.

  First, FIGS. 1 to 3 show an external structure of the vehicle seat 1. The vehicle seat 1 includes a hip seat portion (seat cushion portion) 2, a seat back portion 3, a headrest portion 4, and a seat back portion 3. The hinge bracket 5 is connected to the hip seat 2 so as to be relatively rotatable.

  Next, FIG. 4 and FIG. 5 show the internal structure as seen from the back side and the back side, respectively, after removing the skin 28 and the pleat pad 29 (see FIG. 6) of the vehicle seat 1.

  First, the hip seat portion 2 is reinforced in a flange shape by bending the periphery of a long metal plate in the front-rear direction having a U-shaped cross section formed along the outer shape of the hip seat portion 2 shown in FIG. The hip seat frame 21 formed in the above-mentioned manner and a predetermined width spanned in a beam shape integrally on the upper surface between the front ends of the left and right side frame portions 21b, 21b of the hip seat frame 21 having a U-shaped cross section. The front plate portion 21a and the first high-tensile steel plate 24 stretched between the side frame portions 21b and 21b and between the front plate portion 21a and the rear frame portion 21c.

  The first high-tensile steel plate 24 is formed in a cross-like shape as a whole, with edges 24b, 24b, 24c, and 24c having predetermined lengths extending in four directions, front, rear, left, and right, respectively, as square pieces having a predetermined width. The front, rear, left, and right edges 24b, 24b, 24c, 24c are substantially the whole except for the above-mentioned side frame portions 21b, 21b, the front plate portion 21a, and the welding surface portion that is welded and integrated with the rear frame portion 21c. .., 26, 26..., 26, 26..., 26, 26... Are positioned adjacent to each other. Many are arranged in a staggered pattern in multiple rows while shifting.

  .., 26, 26... 26, 26... 26, 26... The strength against the tensile stress of the edges 24b, 24b, 24c, and 24c and the restoring force when the tensile stress is released, that is, the elastic expansion / contraction force (spring property) is set to a desired magnitude.

  Under such a configuration, the outer periphery of the first high-tensile steel plate 24 and the side frame portions 21b and 21b, the front plate portion 21a, and the rear frame portion 21c is, for example, a cross-sectional view of FIG. As shown in FIG. 1A-A), a pleated pad 29 made of an elastic material (nonwoven fabric mat) integrated with a cloth or other skin 28 is joined and integrated into the hip seat portion 2 as shown in FIGS. Is formed.

  Therefore, according to such a configuration, the high-tensile expanded metal shape in which the front and rear left and right edge portions 24b, 24b, 24c and 24c of the first high-tensile steel plate 24 have a restoring force in the front-rear and left-right expansion and contraction directions. That is, it can function as a flat elastic spring member, and the hip portion of the seated person is elastically supported via the flat rectangular plate portion 24a. Therefore, even if the urethane pad member of the hip seat portion 2 is abolished, the occupant does not feel an uncomfortable hardness and uneven feeling like when a conventional wire or S-spring is used. I'll do it. Therefore, the urethane pad member can be eliminated.

  On the other hand, after such a configuration, the thickness of the pleat pad 29 is increased (for example, up to the conventional urethane pad), and the pleated pad 29 is aligned with the outer shape of the hip seat 2 as shown in FIG. By providing the molded plate-like seat frame 21 and the first high-tensile steel plate 24, which is a plate-like elastic member, in an enveloping manner, sufficient cushioning properties are realized.

  Therefore, it is possible to provide a practical vehicle seat having an effective cushioning property while eliminating the conventional urethane pad member as described above and reducing the number of materials and assembling steps.

  Further, in the case of the same configuration, since the entire support portion of the hip is substantially a single metal plate, the strength and durability are high, and the front, rear, left and right edges 24b, 24b, 24c, 24c are attached. Since it is only necessary to connect and integrate the front plate portion 21a, the rear frame portion 21c, and the inner side surfaces of the left and right side frame portions 21b and 21b by a method such as welding, it is extremely simple and stability after mounting. High reliability.

  Next, the seat back portion 3 shown in FIG. 1 and FIG. 3 has a U-shaped section with a long top and bottom formed along the outer shape of the seat back portion 3 shown in FIG. 3, for example, as shown in FIG. The seat back frame 31 that is continuous in a U shape, the headrest mounting holes 31a and 31a provided in the upper end 3b portion of the seat back frame 31, and the side frame portions 31b and 31b of the seat back frame 31 are stretched. And a second high-tensile steel plate 32 having a predetermined width in the vertical direction. The lower end of the seat back frame 31 has hinge brackets 5 and 5 at its left and right ends as shown in FIG. 5 is attached to the rear end portions of the side frame portions 21b and 21b of the hip seat 2 side hip seat frame 21 so as to be relatively rotatable.

  The second high-tensile steel plate 32 is connected and integrated by welding the left and right side edges 32a and 32a to the front side of the left and right side frame parts 31b and 31b of the seat back frame 31. In addition, a large number of elliptical punching holes 32b, 32b, 32b, 32b, a plurality of rows from the upper end side to the lower end side, excluding the weld portion, are provided between the center side back contact surface and the left and right edges 32a, 32a. .., 32b, 32b,... Are arranged in a staggered manner with their positions shifted from each other.

  Therefore, also in the case of the seat back part 3, the elastic punching and stretching of the two sets of left and right, multiple rows of punching holes 32a, 32a..., 32a, 32a. It functions as a part and elastically supports a wide back surface part by the same elastic deformation action as in the case of the first high-tensile steel plate 24 described above.

  For this reason, on the outer periphery of the seat back frame 31 and the second high-tensile steel plate 32 portion of the seat back portion 3, a pleat pad 29 in which a skin 28 having a sufficient thickness similar to that of FIG. If the cover is stretched (cross-sectional view omitted), it is natural that the seated person will not feel uncomfortable unevenness when using a wire or S-shaped spring (conventional) on the back. Good cushioning properties similar to those when using can be realized. It can also be used with a soft feel overall.

  Note that the first and second high-tensile steel plates 24 and 32 in the above embodiment have, for example, a tensile strength of 490 Mpa or more in consideration of, for example, weldability at the time of attachment to the seat frame members 21 and 32. (JIS standard: HT steel, Japan Welding Association standard: HW steel, etc.) is selected, and the plate thickness can be obtained in consideration of necessary workability and formability as long as necessary rigidity and toughness can be obtained. It is made as thin as possible to reduce its weight and to achieve soft elasticity with good usability.

(Modification)
The above-described elliptical punching holes 26, 26,..., 32b, 32b,... Can be changed to elongate cutout grooves that are employed, for example, when forming expanded metal.

1 is an external perspective view of a vehicle seat according to a best embodiment of the invention of this application. It is a perspective view which shows the external structure of the hip seat part of the vehicle seat. It is a perspective view of the external structure of the seat back portion of the vehicle seat. It is the perspective view seen to the back side which shows the internal structure of the hip seat part of the vehicle seat. It is the perspective view seen from the back side which shows the internal structure of the seat back part of the vehicle seat. It is sectional drawing (AA of FIG. 1) which cut | disconnected the hip seat part of the vehicle seat from upper direction to the downward direction in the center, and was seen from the front side to the back side direction.

Explanation of symbols

  1 is a vehicle seat, 2 is a hip seat (seat cushion) part, 3 is a seat back part, 21 is a hip seat frame, 21a is a front plate part, 21b is a side frame part of the hip seat frame, and 21c is a hip seat frame Rear frame portion, 24 is a first high strength steel plate, 24b and 24b are left and right edges of the first high strength steel plate, 24c and 24c are the front plate portion side and the rear frame portion side of the first high strength steel plate. Edges, 26, 26... Punching holes of the first high-tensile steel plate, 31 is a seat back frame, 32 is a second high-tensile steel plate, 32a and 32a are left and right edges of the second high-tensile steel plate. Reference numerals 32b, 32b,... Are punching holes of the second high-tensile steel plate.

Claims (5)

  A seat part is provided so as to cover the seat frame formed along the outer shape of the seat, a plate-like elastic member provided between the frame parts of the seat frame, and the seat frame and the plate-like elastic member. A vehicle seat comprising a pad member, wherein the pad member comprises only a pleated pad integrated with an outer skin, and the pleated pad is thickened. Sheet.   2. The vehicle seat according to claim 1, wherein a high-tensile steel plate is used as a plate-like elastic member provided between the frame portions of the seat frame.   3. The vehicle seat according to claim 2, wherein the high-tensile steel plate is fixed by welding edge portions extending in the front-rear or left-right direction of the seat frame between the frame portions of the seat frame.   The vehicle seat according to claim 1, wherein the seat portion is a hip seat portion.   The vehicle seat according to claim 1, wherein the seat portion is a seat back portion.

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