JPH0626699U - Urethane structure of car seat - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a urethane structure for a vehicle seat, in which abnormal noise does not occur due to contact between the urethane pad and the seat frame. [Structure] In a structure in which a non-woven fabric 5 is laminated on the seat frame 2 side of a urethane pad 4 of an automobile seat attached to the seat frame 2, a non-woven fabric 5 having a film 6 attached to the side of the urethane pad 4 that contacts the seat frame 2 Urethane foam 4 by integrally foaming
The film 6 is interposed between the non-woven fabric and the nonwoven fabric 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a urethane structure for a vehicle seat, and more particularly, to a urethane structure for a vehicle seat for preventing generation of noise of a seat frame and a seat pad.

[0002]

[Prior art]

 Conventionally, as shown in FIG. 3, a seat back 11 of an automobile seat has a seat back frame 12 formed by arranging a plurality of S-shaped springs 13 meandering in the left-right direction between substantially rectangular frame members 12a. The urethane pad 14 is formed so as to wrap around.

In this case, in order to prevent the S-shaped spring 13 from damaging the urethane pad 14 due to the load on the urethane pad 14 when seated, and to maintain the rigidity of the urethane pad 14 itself, the frame 12 side A coarse felt 15 (nonwoven fabric) having a unit weight is integrated on the surface by integral foam molding. The felt 15 can be integrally formed by impregnating the surface of the felt 15 in contact with the urethane pad 14 with urethane.

[0004]

[Problems to be solved by the device]

 However, when urethane is foam-molded, urethane is impregnated into the inside of the felt 15 and foam-molded even near the surface on the opposite side of the felt 15. As a result, as shown in FIG. 4, a hard urethane impregnated layer is formed near this surface. When such a urethane pad 14 is attached to the seat back frame 12, the urethane impregnated layer comes into contact with the S-shaped spring 13 of the frame or the frame material 12a. For this reason, the vibration generated while the occupant is seated and moving causes a unique noise due to the rubbing between the urethane impregnated layer and the frame 12, which is very annoying. Therefore, it is an object of the present invention to provide a urethane structure for an automobile seat in which abnormal noise does not occur due to the contact between the urethane pad and the seat frame.

[0005]

[Means for Solving the Problems]

 According to the present invention, as a technical means for solving the above-mentioned problems, in a structure in which a nonwoven fabric is laminated on the seat frame side of a urethane pad of an automobile seat attached to a frame, a film is formed on the side of the urethane pad that contacts the seat frame. The urethane structure of the automobile seat is constructed by integrally foaming the non-woven fabric to which the above is attached and by interposing a film between the urethane pad and the non-woven fabric to prevent the non-woven fabric from being impregnated with urethane.

[0006]

[Action]

 With the above configuration, the urethane pad is integrally foam-molded on the film side of the non-woven fabric with a film to prevent urethane from impregnating into the non-woven fabric, protect the urethane pad, and impart rigidity to the non-woven fabric. The formation of the impregnated layer can be prevented.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a partially cutaway perspective view of a seat back 1 of the present invention. As in the conventional seat back frame 2, the frame-shaped frame member 2a is a generally tubular pipe that follows the outer shape of the seat back 1, and a plurality of zigzag S-shaped springs as the cushion member 3 are provided on the left and right. It is formed so that a good cushioning property can be provided by receiving the load applied to the seat back passed between the frame members 2a. The seat back frame 2 includes not only the seat back frame 2 shown in FIG. 1 but also a known press structure or wire structure as the frame member 2a, and the cushion member 3 includes an S-shaped spring, a farmed wire or a coil spring. Let's assume.

Although not shown, the foaming mold is formed of a lower mold having a molding concave portion and an upper mold having a molding convex portion as in the conventional case. When the mold is closed, it is possible to form a space that matches the outer shape of the seat back pad 4 to be molded by the molding concave of the lower mold and the molding convex of the upper mold.

Further, the non-woven fabric integrally formed on the back surface of the seat back pad 4 in a backing shape is a so-called needle punch carpet 5. The needle-punched carpet 5 is a non-woven fabric formed by the needle-punched method, in which fine fibers are entwined into a mat-like shape by punching with a needle, and the fibers are adhered and fixed to each other to form a cloth-like shape. Is. Compared to non-woven fabrics such as felt, they are generally finer in unit weight and thinner in thickness. Usually, a resin film is attached to the back surface of such a needle punch carpet 5 to give formability, shape retention and sound insulation. For this reason, it is often used for vehicle carpets. In this embodiment, a urethane film 6 having a predetermined thickness (thickness of about 15 μm in this embodiment) is laminated on the back surface of the needle punch carpet 5 and then cut into a predetermined shape.

Next, a method of molding the seat back 1 will be described. First, a predetermined amount of undiluted urethane solution is poured into the molding concave portion of the lower mold, and the needle punch carpet 5 (with urethane film 6) cut into a predetermined shape in advance is molded on the molding convex portion of the upper mold. It can be attached with the film 6 side facing the molding recess side.

After that, the mold is closed and the urethane stock solution is foamed under a predetermined condition to mold the seat back pad 4 having a shape that fits in the molding space. At this time, at the same time as the foaming, the urethane blends with the urethane film 6 on the back surface of the needle punch carpet 5 and is integrally foam-molded without impregnating the needle punch carpet 5 above the urethane film 6.

After a predetermined time has elapsed, the sheet back pad 4 on which the needle punched carpet 5 is integrally lined is taken out of the mold. By repeating the above procedure, the same seat back pad 4 can be molded.

Now, FIG. 1 is a perspective view showing a state in which the seat back pad 4 thus formed is attached to the seat back frame 2. The seat back frame 2 is attached and integrated so as to be wrapped around the needle punch carpet 5 side of the molded seat back pad 4. The needle punch carpet 5 on the back surface of the seat back pad 4 is in direct contact with the frame material 2 a and the cushion material 3. However, as shown in FIG. 2, which is an enlarged view of the circled portion in FIG. 1 of the seat back 1, the foamed urethane is blocked by the urethane film 6 laminated on the back surface of the needle punch carpet 5, and the needle punch is performed. It is not impregnated on the carpet 5 side. Therefore, unlike the conventional case, a hard urethane impregnated layer is not formed in the needle punch carpet 5.

That is, by using the needle punch carpet 5 having a two-layer structure in which the urethane film 6 is laminated, the needle punch carpet 5 retains the original flexible material characteristics of the needle punch carpet even after the urethane foaming. Therefore, no rub noise is generated due to strong contact and friction with the frame material 2a or the S-shaped spring 3 due to the load when seated, and the occupant does not feel uncomfortable while traveling. In addition, since the needle punch carpet 5 is usually finer in unit weight than the conventional coarse felt and the urethane film 6 is laminated, it easily fits into the molding convex portion of the upper mold of the urethane foam mold and is easy to set and is produced. The property is improved. Furthermore, there is no need to improve the non-woven fabric to prevent excessive urethane impregnation.

Although the needle punch carpet 5 is used in this example, the present invention is not limited to this. Any non-woven fabric to which a resin having a urethane impregnation preventing function can be attached, which can protect the seat back pad 4 and impart rigidity to the seat back pad 4 and does not generate abnormal noise even when contacted with the frame 2 or the like, may be used. Also, the impregnation prevention film is not limited to urethane, and it can be lined on a non-woven fabric to prevent urethane from impregnating so that urethane does not form a hard impregnation layer on the non-woven fabric, and is molded integrally by urethane foaming. Anything can be used.

Further, although the seat back 1 is described in this example, the present invention is not limited to this example, and the urethane structure of the present invention is not limited to the seat cushion frame even when the seat cushion pad is integrally formed by urethane foam molding. In the relationship, the same noise prevention effect can be achieved.

[0017]

[Effect of device]

 As described above, according to the present invention, a non-woven fabric having a resin impregnation prevention film adhered to the back surface is integrally formed on the seat frame side of the foamed seat back pad of the automobile seat, so By impregnating urethane into the nonwoven fabric, it is possible to prevent the formation of a hard urethane-impregnated layer in the nonwoven fabric. Therefore, when a load is applied to the seat back, it is possible to prevent the generation of a rubbing noise that is tactile due to the strong contact between the seat back frame and the impregnated layer, and it is possible to provide a good riding comfort.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a seat back.

FIG. 2 is an enlarged view of a circled portion in FIG. 1 showing a laminated structure of a seat back pad and a needle punch carpet.

FIG. 3 is a partially cutaway perspective view of a conventional seat back.

FIG. 4 is an enlarged view of a circled portion in FIG.

[Explanation of symbols]

 2 ... Seat frame (seat back frame) 4 ... Urethane pad (seat back pad) 5 ... Non-woven fabric (needle punch carpet) 6 ... Film (urethane film)

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Claims (1)

[Scope of utility model registration request] 1. In a structure in which a non-woven fabric is laminated on the seat frame side of a urethane pad of an automobile seat attached to a seat frame, the non-woven fabric having a film attached to the side of the urethane pad abutting the seat frame is integrally foam-molded. The urethane structure of the automobile seat has a structure that prevents the non-woven fabric from being impregnated with urethane by interposing a film between the urethane pad and the non-woven fabric.