Vehicle seat and coupling method for use in vehicle seat
View Patent ↗A vehicle seat includes a coupling bracket coupling the side frame to the floor-side seat supporting member and fixed to the side frame by welding joining. An upper part of the coupling bracket and a lower part of the side frame are overlapped with each other in an overlapped region. An edge of a first member as one of the coupling bracket and the side frame in the overlapped region is welded, in a first welding joining portion, to a second member as the other of the coupling bracket and the side frame. A joining hole extending through the first member in a plate thickness direction thereof is provided at a position in the overlapped region other than the first welding joining portion, and an edge of the joining hole is welded, in a second welding joining portion, to the second member.
1. A vehicle seat comprising:
a seat cushion having a side frame;
a floor-side seat supporting member; and
a coupling bracket that couples the side frame to the floor-side seat supporting member, the coupling bracket being fixed to the side frame by welding joining, wherein
an upper part of the coupling bracket and a lower part of the side frame overlap each other in an overlapped region;
an edge of the lower part of the side frame is welded to the coupling bracket in the overlapped region at a first welding joining portion, and
a joining hole that extends through the side frame in a plate thickness direction of the side frame is provided at a position in the overlapped region other than the first welding joining portion, and an edge of the joining hole is weld to the upper part of the coupling bracket at a second welding joining portion.
2. The vehicle seat according to claim 1 , wherein the joining hole is a long hole elongated in a forward-backward direction of the seat cushion.
3. The vehicle seat according to claim 1 , wherein the coupling bracket is disposed on an outer side of the side frame in a width direction of the seat cushion.
4. The vehicle seat according to claim 2 , wherein the coupling bracket is disposed on an outer side of the side frame in a width direction of the seat cushion.
5. The vehicle seat according to claim 1 , wherein
the coupling bracket is formed by from a plate member; and
reinforcing projections are provided in both end portions of the coupling bracket in a forward-backward direction of the seat cushion.
6. A coupling method for a vehicle seat including a seat cushion having a side frame, a floor-side seat supporting member, and a coupling bracket that couples the side frame to the floor-side seat supporting member, the coupling bracket being fixed to the side frame by welding joining, the coupling method comprising:
overlapping an upper part of the coupling bracket with a lower part of the side frame in an overlapped region;
welding, in a first welding joining portion, an edge of the side frame to the coupling bracket, from a side frame side of the overlapped region;
providing a joining hole that extends through the side frame in a plate thickness direction of the side frame at a position in the overlapped region other than the first welding joining portion; and
welding, in a second welding joining portion, an edge of the joining hole to the coupling bracket, from the side frame side of the overlapped region.
7. The vehicle seat according to claim 1 , wherein
an upper edge of the joining hole is welded to the coupling bracket.
8. The vehicle seat according to claim 1 , wherein
the joining hole is positioned on an opposite side of a fitting hole of the coupling bracket from the first welding joining portion.
9. The vehicle seat according to claim 1 , wherein
the joining hole is positioned between a fitting hole of the coupling bracket and an upper portion of the side frame.