JP7380442B2 - Seat pad for vehicle seats - Google Patents

Description

The present invention relates to a seat pad for a vehicle seat.

BACKGROUND ART Conventionally, some cushion pads for automobile seats have a reinforcing wire frame inserted on the back side that contacts the floor. In the cushion pad of the automobile seat described in Patent Document 1, a metal wire frame assembled into a rectangular frame shape when viewed from above is embedded on the back side.

Japanese Patent Application Publication No. 2014-172434

In the cushion pad described in Patent Document 1, the back side is in contact with and supported by the floor over almost the entire surface, and the wire frame is buried within the cushion pad and is not exposed to the outside, so it directly contacts the floor. Never. This eliminates the need to provide a member such as felt to prevent interference between the wire frame and the floor on the back side of the cushion pad. On the other hand, a part of the back side of the cushion pad is not in contact with the floor and there is insufficient support for that part, so in order to reinforce that part, a wire member other than the rectangular wire frame is installed externally. There are cases where you want to install it in an exposed state. In such cases, after insert-molding another wire member into the cushion pad, it is necessary to attach an interference prevention material such as felt to the back side of the cushion pad using adhesive or adhesive to prevent interference with the floor in order to prevent noise generation. there were. As a result, there is a problem in that after the cushion pad, which is a large component, is molded, the workability of attaching an interference prevention material such as felt to the back side of the cushion pad by adhesion or adhesive is poor.

In view of these problems, an object of the present invention is to provide a vehicle seat in which a wire member that is attached to the back side of the seat pad and partially reinforces the seat pad is attached with good workability, and in which the occurrence of abnormal noises etc. is suppressed. The purpose is to provide padding.

A first aspect of the present invention relates to a seat pad that is a cushioning material for a vehicle seat. The seat pad has a back surface opposite to the seating surface, which has a contacting portion that is supported by contacting the vehicle body and a non-contacting portion that is not supported by contacting the vehicle body. A reinforcing wire member is attached in a bridging manner between the contact portions sandwiching the non-contact portion. A felt member for suppressing contact with the vehicle body is attached to a portion of the wire member corresponding to the contact portion by adhesive or adhesive. The felt member is attached to the seat pad in a state in which a portion of the foamed resin material forming the seat pad is impregnated and hardened.

According to the first invention, when attaching the wire member for suppressing deformation of the non-contacting portion to the back surface of the seat pad, the seat pad is foam-molded with the felt member attached to the portion of the wire member corresponding to the contact portion. do it. As a result, the wire member can be attached to the cushion pad with good workability, and the wire member and the vehicle body can be prevented from coming into contact with each other, thereby suppressing the occurrence of abnormal noise and the like.

A second invention of the present invention is characterized in that, in the first invention, the felt member is attached by adhesive or adhesive while sandwiching the wire member from the seating surface side and the back surface side. .

According to the second aspect of the invention, the felt member is attached by adhesion or adhesive with the wire member sandwiched between the seating surface side and the back surface side, so that the wire member can be more firmly attached to the cushion pad.

A third invention of the present invention is that in the first invention or the second invention, the wire member has a substantially U-shape when viewed from the seating surface side, and the felt member is arranged on the opening side of the U-shape. It is characterized in that it is attached to the opposite side of the opening side.

According to the third invention, the wire member has a substantially U-shape when viewed from the seating surface side, and the felt member is attached to the opening side of the U-shape and the opposite side to the opening side, so that the wire member is more stable. Non-contact parts can be reinforced.

FIG. 1 is a perspective view of an automobile rear seat according to an embodiment of the present invention. FIG. 3 is a perspective view showing how the seat cushion of the automobile rear seat in the above embodiment is attached to the vehicle body. It is a top view of the seat cushion of the said embodiment. The cushion cover is not shown. 4 is a cross-sectional view taken along line IV-IV in FIG. 3. FIG. 4 is a cross-sectional view taken along line VV in FIG. 3. FIG. 4 is a cross-sectional view taken along line VI-VI in FIG. 3. FIG. 4 is a cross-sectional view taken along line VII-VII in FIG. 3. FIG. FIG. 6 is a cross-sectional view of a portion corresponding to FIG. 5 showing the mold for the cushion pad of the above embodiment.

1 to 8 illustrate one embodiment of the invention. This embodiment is an example in which the present invention is applied to a cushion pad 10 of a rear seat 1 for an automobile. In each figure, arrows indicate directions when the automobile rear seat 1 is attached to the automobile. In the following description, descriptions regarding directions will be made with this direction as a reference. The automobile rear seat 1 of this embodiment is a bench seat for three people, and has a length in the left and right direction that is approximately the same as the width of the vehicle interior, and includes a seat cushion 2 that serves as a seating area and a seat back 3 that serves as a backrest. It is equipped with. Here, the automobile rear seat 1 corresponds to a "vehicle seat" in the claims.

As shown in FIG. 2, the seat cushion 2 is placed and fixed on a floor F that constitutes a part of the body of the automobile. The floor F includes a planar main floor F1 and a subfloor F2 fixed to the upper surface of the main floor F1. The main floor F1 constitutes the lower surface of the vehicle compartment, and is formed with a plurality of ribs (not shown) to increase surface rigidity. The subfloor F2 includes a substantially U-shaped pipe-shaped frame 4 that opens toward the rear when viewed from above, four front brackets 5 that support the front side of the frame 4 (on the side opposite to the opening), and It has a pair of left and right rear brackets 6 that support the rear side (opening side end portion) of the frame 4. A pair of left and right side plates 7 having a substantially semicircular shape when viewed from above are attached to the upper portions of the left and right ends of the frame 4, and a pipe-shaped horizontal frame 8 extending in the left-right direction is mounted on the upper surface of the left and right side plates 7. is installed in the form of a bridge. A front plate part 9a is disposed below the horizontal frame 8 and extends upward substantially perpendicularly to the main floor F1, and is arranged in a substantially horizontal direction between the upper end of the front plate part 9a and the main floor F1. An extending upper plate portion 9b is arranged in a spanning manner. The front plate part 9a and the upper plate part 9b constitute a battery cover 9, and a battery (not shown) is arranged in a space surrounded by the main floor F1 and the battery cover 9. The lower surface of the cushion pad 10 is disposed in contact with the upper surface of the upper plate portion 9b and the upper surface of the left and right side plate portions 7. Here, the floor F corresponds to the "vehicle body" in the claims.

As shown in FIGS. 1 to 3, the seat cushion 2 is formed by covering a cushion pad 10, which is a cushion material, into which a cushion frame 20 forming a skeleton is inserted, and a cushion cover 30, which is a skin material. The seat cushion 2 includes a pair of left and right seat sections 2A and a center seat section 2B disposed between the left and right seat sections 2A, and is formed in a symmetrical shape. Here, the cushion pad 10 corresponds to a "seat pad" in the claims.

As shown in FIGS. 3 to 7, the cushion frame 20 is formed by combining steel wires with a diameter of about 5 mm, and is insert-molded into the cushion pad 10 and integrated with the cushion pad 10. . The cushion frame 20 includes a substantially U-shaped front outer frame 21 that is arranged along the front outer periphery of the cushion pad 10 and opens toward the rear when viewed from above, and a front outer periphery frame 21 that is arranged along the rear outer periphery of the cushion pad 10 and opens toward the rear when viewed from above. It has a substantially U-shaped rear outer peripheral frame 22 that opens toward the front when viewed from above. The front outer circumferential frame 21 and the rear outer circumferential frame 22 are connected at their opening side ends by welding, and are formed into a substantially rectangular shape when viewed from above. A locking portion 22a having a substantially rectangular shape when viewed from above is attached to a slightly left side of the center portion of the rear outer peripheral frame 22 in the left-right direction for fixing the cushion frame 20 to the main floor F1. The front outer circumference frame 21 and the rear outer circumference frame 22 are embedded in the outer circumference of the cushion pad 10 in a connected state and are not exposed to the outside.

As shown in FIGS. 3 to 6, the cushion frame 20 has a pair of left and right wire members 23 disposed approximately in the center of each left and right seat portion 2A in the front-rear direction. The wire member 23 is formed by bending a steel wire with a diameter of approximately 5 mm, and opens toward the outside of the seat when viewed from above (the wire member 23 on the right side is directed to the right, and the wire member 23 on the left side is directed to the left). It is approximately U-shaped. Felt members 24 are attached to the open end 23a side of the wire member 23 and the connecting end 23b side opposite to the open end 23a so as to sandwich the wire member 23 from above and below. Specifically, on the side of the opening end 23a, a pair of upper and lower outer felt members 24a, which are rectangular in shape when viewed from above, are adhesively integrated by sandwiching the wire member 23 with adhesive applied to the surfaces in contact with each other. It is installed by On the side of the connecting end 23b, a pair of upper and lower inner felt members 24b, which are rectangular in shape when viewed from above, are attached by sandwiching the wire member 23 and adhering them together using an adhesive applied to the surfaces in contact with each other. . A through hole 24a1 that penetrates in the vertical direction is formed in the center of the outer felt member 24a, and a through hole 24b1 that penetrates in the vertical direction is formed in the center of the inner felt member 24b. As will be described later, when the wire member 23 is attached to the cushion pad 10, as shown in FIG. It is arranged so as to come into contact with the upper surface of the front plate portion 9a of F2.

As shown in FIGS. 3 to 7, the cushion pad 10 is integrally molded from urethane foam with a cushion frame 20 inserted therein. The urethane foam is a foam of urethane resin, and its density is about 0.04 g/cm ³ . The cushion pad 10 has a seating surface 10a that is an upper surface and a back surface 10b that is a lower surface. As shown in FIG. 8, the cushion pad 10 is foam-molded using a mold 50 having a cavity 51 having the outer shape of the cushion pad 10. The mold 50 has a lower mold 52 and an upper mold 53, and when the upper mold 53 is closed with respect to the lower mold 52, a cavity 51 is formed therebetween. The cavity surface 52a of the lower mold 52 is a surface that forms the seating surface 10a of the cushion pad 10, and the cavity surface 53a of the upper mold 53 is a surface that forms the back surface 10b of the cushion pad 10. On the cavity surface 53a of the upper mold 53, there are a magnet (not shown) that temporarily holds the connected front outer peripheral frame 21 and rear outer peripheral frame 22, and an arrowhead-shaped temporary fixing member 53b that temporarily holds the wire member 23. There are two on each side. Each temporary fixing member 53b engages with the outer felt member 24a or the inner felt member 24b by being inserted into the through hole 24a1 of the outer felt member 24a attached to the wire member 23 or the through hole 24b1 of the inner felt member 24b. The wire member 23 is temporarily held on the cavity surface 53a. In this state, the urethane foam resin raw material for forming the cushion pad 10 is introduced onto the cavity surface 52a of the lower mold 52, and the upper mold 53 is closed. In the process of foaming and hardening the introduced urethane foam resin raw material, the connected front outer peripheral frame 21 and rear outer peripheral frame 22 are integrated with the cushion pad 10 in a buried state. At the same time, the wire member 23 is integrated with the cushion pad 10 by impregnating and hardening a portion of the urethane foam resin raw material charged into the outer felt member 24a or the inner felt member 24b. After the urethane foam resin raw material is foamed and hardened, when the upper mold 53 is opened relative to the lower mold 52, the temporary fixing member 53b tears off a part of the outer felt member 24a or the inner felt member 24b, thereby forming the cushion pad 10. deviate from Then, the molded cushion pad 10 is taken out from the lower mold 52.

As shown in FIGS. 1 and 2, the cushion cover 30 includes a planar member in which a thin urethane slab pad is integrally laminated on a skin material such as fabric on the seating surface side, and is arranged along the outer shape of the cushion pad 10. It is cut into multiple parts and sewn into one piece. The cushion cover 30 is attached to the cushion pad 10 by covering the upper surface side (the side of the seating surface 10a) of the cushion pad 10 and fixing the end portion and the like to the cushion frame 20.

With the seat cushion 2 fixed to the floor F, the front part of the cushion pad 10 is supported by the sub-floor F2, and the rear part of the cushion pad 10 is supported by the main floor F1. At this time, the back surface 10b of the front portion of the cushion pad 10 is in contact with the upper surface of the left and right side plates 7 of the subfloor F2 and the upper surface of the upper plate portion 9b. A wire member 23 is located in a portion between the side plate portion 7 and the upper plate portion 9b where the back surface 10b of the cushion pad 10 does not come into contact with the subfloor F2. Specifically, the open end portion 23a of the wire member 23 contacts the upper surface of the side plate portion 7 via the outer felt member 24a, and the connecting end portion 23b of the wire member 23 contacts the upper surface of the side plate portion 9b via the inner felt member 24b. is in contact with the top surface of the That is, the portion where the back surface 10b of the cushion pad 10 does not come into contact with the subfloor F2 is supported from below by the wire member 23 disposed in a bridging manner between the side plate portion 7 and the upper plate portion 9b, thereby preventing downward deformation. is suppressed. At this time, since the wire member 23 is in contact with the metal sub-floor F2 via the outer felt member 24a and the inner felt member 24b, the generation of abnormal noise caused by contact between metals is suppressed. Here, a portion where the back surface 10b of the cushion pad 10 contacts the sub-floor F2 is a contact portion 10b1, and a portion where the back surface 10b of the cushion pad 10 does not contact the sub-floor F2 is a non-contact portion 10b2.

The embodiment configured as described above has the following effects. When attaching the wire member 23 that suppresses vertical deformation of the non-contacting portion 10b2 to the back surface 10b of the cushion pad 10, the upper mold 53 is temporarily attached with the outer felt member 24a and the inner felt member 24b attached to the wire member 23. The cushion pad 10 may be foam-molded while being held. Thereby, the wire member 23 can be attached to the cushion pad 10 with good workability, and contact between the wire member 23 and the floor F can be prevented, thereby suppressing the occurrence of abnormal noises and the like. Further, since the outer felt member 24a and the inner felt member 24b are attached with adhesive while sandwiching the upper and lower surfaces of the wire member 23, respectively, the wire member 23 can be attached more firmly to the cushion pad 10. Furthermore, the wire member 23 has a substantially U-shape when viewed from above, and the outer felt member 24a is attached to the open end 23a, and the inner felt member 24b is attached to the connecting end 23b, so that the wire member 23 is more stable. The non-contact portion 10b2 can be supported from below.

Although specific embodiments have been described above, the present invention is not limited to their appearance and configuration, and various changes, additions, and deletions can be made without changing the gist of the present invention. Examples include:

1. In the above embodiment, the present invention is applied to the cushion pad 10 of the rear seat 1 for an automobile. However, regardless of this, it can be applied to the back pad of the automobile rear seat 1, and can also be applied to the cushion pad and back pad of the automobile front seat.

2. In the embodiment described above, the wire member 23 has a substantially U-shape when viewed from above. However, regardless of this, when viewed from above, it may have a substantially rectangular shape, a substantially I-shape, or a substantially W-shape. The shape is not limited as long as it is arranged in a bridging manner on the contact portion 10b1.

3. In the embodiments described above, the present invention is applied to a car seat, but it may also be applied to a seat mounted on an airplane, a ship, a train, etc.

1 Automobile rear seat (vehicle seat)
2 Seat cushion 7 Side plate part 9b Upper plate part 10 Cushion pad (seat pad)
10a Seating surface 10b Back surface 10b1 Contact part 10b2 Non-contact part 20 Cushion frame 23 Wire member 23a Open end 23b Connection end 24 Felt member 24a Outer felt member 24b Inner felt member F Floor (vehicle body)
F1 Main floor F2 Sub floor

Claims (3)

A seat pad for a vehicle seat,
The seat pad has a back surface opposite to the seating surface that is in contact with and supported by the vehicle body, and a non-contact part that is not supported in contact with the vehicle body;
A reinforcing wire member is installed in a bridging manner between the abutting portions sandwiching the non-abutting portion;
A felt member for suppressing contact with the vehicle body is attached to a portion of the wire member corresponding to the contact portion by adhesive or adhesive;
A seat pad for a vehicle seat, wherein the felt member is attached to the seat pad in a state in which a portion of a foamed resin material forming the seat pad is impregnated and hardened. 2. The seat pad for a vehicle seat according to claim 1, wherein the felt member is attached by adhesive or adhesive with the wire member sandwiched between the seating surface side and the back surface side. In claim 1 or claim 2, the wire member has a substantially U-shape when viewed from the seating surface side, and the felt member is attached to an opening side of the U-shape and a side opposite to the opening side. Seat pads for vehicle seats.

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