Method for manufacturing vehicle seat core member and vehicle seat core member

Patent metadata

Field	Value
Publication number	US-9902098-B2
Application number	US-201515509966-A
Country	US
Kind code	B2
Filing date	Sep 15, 2015
Priority date	Sep 16, 2014
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

Abstract

A method for manufacturing including securing attachments disposed near both ends in the seat core member front portion made of a molded article of expanded beads, the securing attachments being connected by an embedded connecting member extending in the seat core member longitudinal direction. The securing attachment includes a base embedded in the molded article of expanded beads, an upright frame joined to the base to extend out of the molded article of expanded beads, and a securing portion extending from the upright frame to project away from the molded article of expanded beads. The method includes creating, during or after molding the molded article of expanded beads, a space or notch in an outer side of the securing attachment upright frame of the molded article of expanded beads in the seat core member longitudinal direction, the notch extending toward an outer side in the seat core member longitudinal direction.

First claim

The invention claimed is:

1. A method for manufacturing by integral molding a vehicle seat core member including securing attachments used for securing a seat to a vehicle and embedded in a molded article of expanded beads made of thermoplastic resin,
the securing attachments being disposed near both ends in a front portion of the vehicle seat core member and connected by a connecting member embedded in a front portion of the molded article of expanded beads, the connecting member extending in a longitudinal direction of the seat core member,
each of the securing attachments including a base embedded in the molded article of expanded beads, an upright frame joined to the base to extend out of the molded article of expanded beads, and a securing portion extending from the upright frame to project away from the molded article of expanded beads, the method comprising
creating, during or after molding the molded article of expanded beads and before completion of shrinking of the molded article, a space at an outside position from a part of the molded article of expanded beads where the upright frame of the securing attachment is embedded in a longitudinal direction of the seat core member, or a notch at an outside position from the part of the molded article of expanded beads in a longitudinal direction of the seat core member where the upright frame of the securing attachment is embedded toward an outer side in a longitudinal direction of the seat core member.

2. The method for manufacturing a vehicle seat core member according to claim 1 , wherein
a plate member constitutes an end of the connecting member with the base of the securing attachment joined to the plate member, and
a space or a notch is created to extend in a direction intersecting the longitudinal direction of the seat core member, during or after molding the molded article of expanded beads, at an outside position from a part of the molded article of expanded beads where the plate member and the base are embedded.

3. The method for manufacturing a vehicle seat core member according to claim 1 , wherein
a plate member constitutes an end of the connecting member with the base of the securing attachment joined to the plate member, and
a space is created, during or after molding the molded article of expanded beads, at an outside position from a part of the molded article of expanded beads where the plate member is embedded and at a further outer portion than an outer edge of the plate member in the longitudinal direction of the seat core member.

4. The method for manufacturing a vehicle seat core member according to claim 1 , wherein the space or the notch is created as deep as one third or more of a depth from a surface of the molded article to the base.

5. The method for manufacturing a vehicle seat core member according to claim 1 , wherein the connecting member is a wire having a diameter of 2 mm to 8 mm and a tension strength of 200 N/mm 2 or higher.

6. The method for manufacturing a vehicle seat core member according to claim 1 , wherein a thermoplastic resin forming the molded article of expanded beads includes a crystalline resin.

7. The method for manufacturing a vehicle seat core member according to claim 1 , wherein
the connecting member has a bent section bent in a thickness direction, and
a void cavity is provided, during or after molding the molded article of expanded beads, at an outside position from the bent section in a part of the molded article of expanded beads where the bent section is embedded, the void cavity extending in a thickness direction from a surface of the molded article of expanded beads to the bent section.

8. A vehicle seat core member integrally molded to embed securing attachments for securing a seat to a vehicle in a molded article of expanded beads made of thermoplastic resin, wherein
the securing attachments are disposed near both ends in a front portion of the vehicle seat core member and connected by a connecting member embedded in a front portion of the molded article of expanded beads, the connecting member extending in a longitudinal direction of the seat core member,
each of the securing attachments includes a base embedded in the molded article of expanded beads, an upright frame joined to the base to extend out of the molded article of expanded beads, and a securing portion extending from the upright frame to project away from the molded article of expanded beads, and
the vehicle seat core member is obtained by creating, during or after molding the molded article of expanded beads and before completion of shrinking of the molded article, a space at an outside position from a part of the molded article of expanded beads where the upright frame of the securing attachment is embedded in a longitudinal direction of the seat core member, or a notch at an outside position from the part of the molded article of expanded beads in a longitudinal direction of the seat core member where the upright frame of the securing attachment is embedded toward an outer side in a longitudinal direction of the seat core member.

Assignees

• Jsp Corp

Inventors

• Takayama Atsuo
• Ueguri Motoaki
• Hashimoto Keiichi

Classifications

• B29L2031/771

  Seats · CPC title

• B60N2/005

  Arrangement or mounting of seats in vehicles {, e.g. dismountable auxiliary seats}(B60N2/02 takes precedence {; for railway vehicles B61D1/04}) · CPC title

• B60N2/90

  Details or parts not otherwise provided for · CPC title

• B29L2031/58

  Upholstery or cushions, e.g. vehicle upholstery or interior padding {(mattresses, cushions B29L2031/751)} · CPC title

• B29K2705/12

  Iron · CPC title