Stock material or miscellaneous articles – Structurally defined web or sheet – Including fastener for attaching to external surface
Patent
1995-06-09
1997-08-05
Thomas, Alexander
Stock material or miscellaneous articles
Structurally defined web or sheet
Including fastener for attaching to external surface
428100, 428188, 29722813, 29745226, A47C 3102
Patent
active
056540698
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a cushion body structure for a car seat and, in particular, relates to a cushion body structure available for preventing noise produced by a repetition of separating and fastening between a skin and a planar fastening material by the manner of attaching the skin material to a cushion material through the planar fastening material.
BACKGROUND OF THE ART
Several methods for attaching a cushion material which is made of a foamed body forming a body portion of a car seat and a skin material attached on its surface have been known and publicly used. Specifically as a method of attaching a skin material to a cushion material with a concave surface, a back surface of the skin was bonded over a surface of the cushion material or an integral molding method of injecting urethane into a cushion material molding die after setting a skin material have often been used. However, in either method, their own production systems for carrying out such methods are required and it is difficult to install such systems in a continuous assembly line, thereby increasing the cost for transferring and manipulating materials. Also, such a method in the art is a mass production system and it is thus required to maintain its operation rate. However it is difficult to control a volume corresponding to a variation of the production rate. Thus, such a production method results in low productivity and causes a rise in cost.
It is intended to use a planar fastening material in order to facilitate attaching a skin material to a cushion material to eliminate the above problems. The planar fastening material is so called a planar fastener and has innumerable hooked or ring-shaped small protrusions imbedded on a knitted or textile base sheet. The hooked or ring-shaped small protrusions fasten and mechanically attach to a back side of the skin material. However, in this mechanical attachment of the skin by the planar fastening material, unexpected troubles are found in practice.
Explaining the troubles with reference to FIG. 4, when a person gets off a seat 15, a tensile force as indicated by an arrow F1 acts on a skin 16. Since the skin 16 is attached on the planar fastening material 17 by the mechanical tensile force, the skin is instantaneously separated from the planar fastening material, when a component F2 of the tensile force F1 exceeds the mechanical attachment force. However, if the force F1 is reduced by movement of the person, then the skin is immediately fastened to the planar fastening material to revert to its initial state again. Such a repetition of separating and fastening produces noise or vibration, and users may have distrust of the quality of the seat and they may also feel displeasure and wariness. Also, they may mistake the noise for static electricity.
OBJECTS
Therefore, it is an object of the present invention to provide a cushion body structure for a car seat which prevents a repetition of separating and fastening between a planar fastening material and a skin material and prevents the resultant production of noise or vibration in a seat in which the skin material is attached to the cushion material by the planar fastening material.
DISCLOSURE OF THE INVENTION
In a cushion body structure of a car seat constructed by molding a planar fastening body for fastening a skin material to a cushion material, the present invention provides a cushion body structure which has a proper distance of open space without joining at least a part of the end portions along the planar fastening body to the cushion material positioned in proximity to it, so that the planar material follows the skin material and is not separated by an external force such as a tensile force or the like which acts on the surface material when getting on and off the car seat.
Specifically, the planar fastening material is fixed into the cushion material in a form of the planar fastening body integrated with a support material such as slab urethane foam. Thickness of the slab urethane is not specified in a
REFERENCES:
Supplementary European Search Report (conducted in relation to corresponding EPO Application), Jun. 13, 1996.
Kinoshita Yukihiro
Matsuoka Chikara
Wakimoto Kunihisa
Watadani Takeshi
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