Occupant restraint apparatus

1. An occupant restraint apparatus, comprising:

an anchor adapted to be fixed to a vehicle body;

a lap belt having a tip side fixed to the anchor, and an inflatable portion formed at the tip side;

an inflator for introducing gas from the tip side to inflate the inflatable portion; and

a cover including a first masking portion for covering the anchor, and a second masking portion formed separately from the first masking portion and attached to the first masking portion for covering at least the tip side of the lap belt,

wherein said first masking portion includes an opening with a peripheral portion at an upper side, and said second masking portion includes two flanges at a lower side, the peripheral portion being retained by the two flanges,

wherein the two flanges define a space therebetween, the space becoming larger toward a front side of the cover so that the second masking portion is pivoted in a fore-and-aft direction together with the anchor.

2. The occupant restraint apparatus according to claim 1 , wherein the second masking portion of the cover is configured so as to be opened by being torn when the inflatable portion is inflated.

3. The occupant restraint apparatus according to claim 2 , wherein the second masking portion has a tear line, and is opened by being torn along the tear line when the inflatable portion is inflated.

4. The occupant restraint apparatus according to claim 1 , wherein the tip side of the lap belt is attached to an anchor attachment portion of the vehicle body via the anchor.

5. The occupant restraint apparatus according to claim 4 , wherein the inflator is fixed to the anchor.

6. The occupant restraint apparatus according to claim 1 , wherein the tip side of the lap belt is attached to an anchor attachment portion of a seat via the anchor.

7. The occupant restraint apparatus according to claim 6 , wherein the inflator is fixed to the anchor.

8. The occupant restraint apparatus according to claim 1 , wherein the second masking portion is pivotable in a fore-and-aft direction with respect to the first masking portion.

9. The occupant restraint apparatus according to claim 1 , wherein the second masking portion of the cover is configured so as to hold the tip side of the lap belt in an attitude of being extended substantially upward in a state when the lap belt is not routed to a side of an occupant.

10. The occupant restraint apparatus according to claim 1 , wherein the cover is made of plastic.

11. The occupant restraint apparatus according to claim 1 , further comprising an anchor attachment portion fixed to the vehicle, said anchor being pivotally fixed to the anchor attachment portion.

12. The occupant restraint apparatus according to claim 11 , wherein said anchor attachment portion includes a slot, and said anchor includes a lug portion protruding from the anchor and engaging the slot so that a pivotal range of the anchor is defined by the lug portion and the slot.

13. The occupant restraint apparatus according to claim 12 , wherein said inflator is fixed to the anchor.

14. The occupant restraint apparatus according to claim 12 , wherein said inflator is fixed to the anchor attachment portion.