Device for assembling a seat back of a seat

A device for assembling an incomplete seat back unit into a seat back of a seat, wherein the incomplete seat back unit comprises:

• a foam cushion body configured in a predetermined seat back shape;
• and a unitary three-dimensional covering member of a sack-like shape having one opened side and a pair of opposedly facing spaced-apart first and second extensions integrally defined in one opened side, each being provided with a first hook member and a second hook member, respectively, and wherein said covering member incompletely covers said foam cushion body, with one side of the same cushion body being uncovered by said pair of first and second extensions of said covering member, said device comprising:
• a support base frame;
• a receiving means disposed at one side of said support base frame in which said incomplete seat back unit is received and supported, said receiving means including a plate area on which one side of said incomplete unit of seat back rests;
• a pressing means disposed laterally of said support base frame in the vicinity of said receiving means, said pressing means being for applying a pressure in a direction toward said receiving means so as to pressingly support said incomplete seat back unit received in said receiving means, against said plate area thereof;
• a positioning means disposed at an upper side of said support base frame in vicinity of said receiving means, said positioning means being operable for provisionally securing said first hook member associated with said incomplete seat back unit received in said receiving means and lifting up said first hook member to a predetermined first position;
• a positioning/engaging means disposed on a same plane with said positioning means at the upper side of said support base frame and in the vicinity of said receiving means, said positioning/engaging means being operable for provisionally securing said second hook member associated with said incomplete seat back unit received in said receiving means, at a predetermined second position, and displacing said second hook member therefrom in a direction toward said predetermined first position where said first hook member is secured to said positioning means, to thereby bring said second hook member into engagement with said first hook member to stretch said first and second extensions over said one side of said foam cushion body;
• and
• a positive engagement means defined integrally with said positioning/engaging means, said positive engagement means being for applying a pressure to said first and second hook members which have been engaged with each other by said positioning/engaging means, in order to positively engage said first and second hook members.

A device for assembling an incomplete unit of seat back into a seat back of a seat, wherein the incomplete seat back unit comprises:

• a foam cushion body configured in a predetermined seat back shaped;
• and
• a unitary three-dimensional covering member of a sack-like shape having one opened side and a pair of opposedly facing spaced-apart first and second extensions defined integrally in said one opened side, said pair of first and second extensions facing each other at their respective inward surfaces;
• wherein respective outward surfaces of said first and second extensions extend continuously from an outward surface of said covering member;
• wherein a first hook member of generally inverted-U-shaped cross-section is provided at said inward surface of said first extension and a second hook member of generally inverted-U-shaped cross-section is provided at said outward surface of said second extension,
• and wherein said covering member incompletely covers said foam cushion body, with one side of the same cushion body being uncovering by said pair of said first and second extensions of said covering member,
• said device comprising:
• a receiving means for receiving and supporting said incomplete seat back unit therein, said receiving means including a plate area on which one side of said incomplete seat back unit rests;
• a pressing means for applying a pressure in a direction toward said receiving means so as to pressingly support said incomplete seat back unit received in said receiving means, against said plate area thereof;
• a positioning means operable for provisionally securing said first hook member, with said generally inverted-U-shaped cross-section of said first hook member maintained, and lifting up the same to a predetermined first position;
• a positioning/engaging means operable for provisionally securing said second hook member, as it is provided on said outward surface of said second extension, at a predetermined second position, and displacing said second hook member therefrom, while turning over said second hook member into a state where it generally assumes a U-shaped cross-section, in a direction towards said predetermined first position where said first hook member is secured to said positioning means, with said generally inverted-U-shaped cross-section of said first hook member maintained, thereby bringing said second hook member into engagement with said first hook member, to stretch said first and second extensions over said one side of said foam cushion body;
• and
• a positive engagement means defined integrally with said positioning/engaging means, said positive engagement means being for applying a pressure to said first and second hook members which have been engaged with each other by said positioning/engaging means, in order to make a positive engagement between said first and second hook members.