JP5599562B2 - Seat cushion - Google Patents

Description

  The present invention relates to a seat cushion used for assembling a seat body for a motorcycle, ATV, PWC, or the like.

  In the case of a motorcycle seat, for example, a seat body is generally assembled using a single-layer resin foam as a cushion.

  In a cushion structure with a single-layer structure, if the cushion body is reduced in hardness, the body pressure / load dispersibility, stroke feeling, splash feeling, and touch feeling as a seat can be maintained well, but a bottom sensation, stickiness, etc. are likely to occur. And lacks durability. On the other hand, when the hardness is increased, it is possible to prevent the occurrence of a bottom stab, stickiness and the like as a sheet and to maintain durability, but the body pressure / load dispersibility, the stroke feeling, the splash feeling, and the touch feeling are lowered.

  Conventionally, instead of a cushion structure with a single layer structure, a viscoelastic body such as a viscoelastic urethane elastomer is overlaid on the base urethane foam to reduce the vibrations felt by the occupant and improve riding comfort. It has been proposed to form a body (Patent Document 1).

According to the previously proposed cushion body, the viscoelastic body such as the viscoelastic urethane elastomer makes the price as a sheet expensive and increases the weight.
Japanese Patent Laid-Open No. 02-284881

  The present invention keeps the price low and does not increase weight, and can provide seat performance such as body pressure / load dispersibility, a feeling of stroke, a feeling of splash, a feeling of touch, etc. An object of the present invention is to provide a seat cushion body that can maintain durability performance.

In the invention according to claim 1 of the present application, a cloth material integrally molded with a resin foam is interposed as an intermediate layer, a high hardness resin foam is a lower layer, and a low hardness resin foam is an upper layer. In the seat cushion body formed in the structure, the lower layer is provided below the cloth material, the lower layer is formed with high hardness up to the end in the left-right direction, and the upper layer is the end in the left-right direction until, characterized in that it is formed in the low hardness degree.

The invention according to claim 2 of the present application, the said lower portion layer and the upper portion layer, toward the lower portion layer, characterized in that the width of the lateral direction is larger.

The invention according to claim 3 of the present application is characterized in that left and right side surfaces of each of the upper layer and the lower layer are formed in a continuous inclined shape.

The invention according to claim 4 of the present application is characterized in that the front side end portion of the upper layer covers the front side end portion of the cloth material so as to wrap forward more than the front side end portion of the cloth material. .

  According to the invention of the present invention, it is possible to provide sheet performance such as body pressure / load dispersibility, a feeling of stroke, a feeling of splash, a feeling of touch, etc. It is possible to configure a seat cushion body that can prevent the occurrence of the above and maintain durability.

  The illustrated embodiment relates to a seat cushion used for assembling a seat body for a motorcycle, ATV, PWC, or the like. Fig. 1 shows a cross section of the seat cushion body in the front-rear direction. FIG. 2 shows the seat cushion body in a cross-section in the width direction of the seat.

  The seat cushion shown in the figure has a high hardness (high density) resin foam foam 1 as a lower layer and a low hardness (low density) resin foam foam 2 as an upper layer, and is integrated with the resin foam foam as will be described later. The cloth material 3 to be molded is interposed as an intermediate layer to form a multilayer structure.

  The resin foams 1 and 2 of the lower layer and the upper layer are formed of a foamed urethane resin. A nonwoven fabric is used as the fabric 3 of the intermediate layer, and the nonwoven fabric 3 is interposed over the entire upper surface of the lower layer urethane foam 1 and the entire lower surface of the upper layer urethane foam 2.

  In order to manufacture the above-described seat cushion body, first, the nonwoven fabric 3 is set in the mold of the molding die so as to be a surface layer of the urethane foam, and the urethane foam 1 of the lower layer is foam-molded. Next, the lower layer urethane foam 1 integrally foamed with the nonwoven fabric 3 may be transferred to another mold, the nonwoven fabric 3 may be set upward, and the upper layer urethane foam 2 may be foam molded.

  In the cushion body for a seat configured as described above, the cushion body is formed in a multilayer structure with the nonwoven fabric 3 interposed as an intermediate layer, the high hardness urethane foam 1 as a lower layer, and the low hardness urethane foam as an upper layer. Therefore, the hardness of each of the urethane foams 1 and 2 can be adjusted so as to be suitable as a cushion of the seat.

  Thereby, in addition to sheet performance such as body pressure / load dispersibility, a feeling of stroke, a feeling of splash, a feeling of touch, etc., it is possible to prevent the occurrence of a bottom sensation, stickiness, etc., and to impart durability to the seat body.

  In particular, since the nonwoven fabric 3 molded integrally with the urethane foams 1 and 2 is interposed as an intermediate layer, the nonwoven fabric 3 is provided with surface rigidity by drawing in the surrounding foamed urethane resin. For this reason, while exhibiting the load dispersibility by the nonwoven fabric 3 receiving a load by a surface, a dynamic stroke feeling can also be provided to a sheet | seat main body, and sheet | seat performance can be improved.

  Since the nonwoven fabric 3 is interposed on the entire surface facing the upper surface of the lower layer urethane foam 1 and the lower surface of the upper layer urethane foam 2, it can impart load dispersibility and a dynamic stroke feeling over the entire surface of the sheet. Further, the sheet performance including the touch feeling can be further improved.

  Each of the urethane foams 1 and 2 is formed of an inexpensive foamed urethane resin, and the nonwoven fabric 3 is also inexpensive in price, so that it can be obtained as an inexpensive multi-layered cushion body. Moreover, since the nonwoven fabric 3 is interposed and the thickness of the cushion body is ensured, the weight of the entire sheet can be reduced.

  The cushion body described above is assembled as a seat body by covering the seat skin, and is mounted on the vehicle body as a vehicle seat for motorcycles, ATVs, PWCs and the like because the seat body is attached to the bottom frame of the vehicle body. The vehicle seat can be mounted on the vehicle body as an inexpensive and lightweight seat with good seat performance and durability.

  The urethane foams 1 and 2 and the nonwoven fabric 3 described above are representative examples suitable for constituting a vehicle seat, and foaming of other materials is applicable as long as it can be applied to form a cushion for a seat. Resin and cloth materials can be used. Moreover, although the nonwoven fabric 3 was demonstrated over the whole surface which faces the upper surface of the lower layer urethane foam 1 and the lower surface of the upper layer urethane foam 2, it may be interposed only in the main part of the seating part.

It is explanatory drawing which shows the cushion body for seats concerning this invention in the front-back direction cross section of a sheet | seat. It is explanatory drawing which shows the cushion body for seats of FIG. 1 in the AA cross section.

1 Lower layer resin foam (urethane foam)
2 Top layer resin foam (urethane foam)
3 Fabric material (nonwoven fabric)

Claims (4)

In the cushion body for a seat formed in a multilayer structure with a cloth material integrally molded with the resin foam foam as an intermediate layer, a high hardness resin foam foam as a lower layer, and a low hardness resin foam foam as an upper layer,
The lower layer is provided below the cloth material, wherein the lower layer is formed in the high hardness to the end portions of the left and right direction, further, the top layer that are formed in the low hardness of the end portion in the lateral direction A cushion body for a seat characterized by the above. In the lower portion layer and the upper portion layer, toward the lower portion layer, the seat cushion body according to claim 1, characterized in that the width of the lateral direction is larger. The cushion body for a seat according to claim 1 or 2, wherein left and right side surfaces of each of the upper layer and the lower layer are formed in a continuous inclined shape. The front side end part of the upper layer covers the front side end part of the cloth material so as to wrap around more forward than the front side end part of the cloth material. Cushion body for seats.

Images