Patent ID: 8789321

Claim:
A roof structure having a fundamental roof structure and a plurality of solar cell modules arranged on the fundamental roof structure, wherein the fundamental roof structure is formed by a plurality of roof members each provided with an attaching hole, and wherein the plurality of roof members are arranged outspread planarly in a row to form a plurality of rows on a roof base, are each partly overlapped with an adjacent roof member and partly exposed, and are each fixed to the roof base by a fastening element driven into the attaching hole, the roof structure comprising a plurality of clamps, wherein the plurality of clamps each comprise a holding part having a throughhole, the holding part being partly or entirely sandwiched between adjacent roof members at an overlapping part and the fastening element being driven into the attaching hole of the roof member located below the holding part through the throughhole, so that an overlying roof member located above covers the throughhole with at least a part other than the attaching hole, and the plurality of solar cell modules being mounted on the fundamental roof structure via the clamps, and wherein the holding part consists essentially of a lower plate and an upper plate, the lower plate and the upper plate being integrated with a gap therebetween, the upper plate being longer than the lower plate, and wherein the clamp is attached either to or near an end portion of a specific roof member so that the lower plate is positioned between the specific roof member and an underlying roof member located below at least a part of the specific roof member, and wherein the lower plate has a hole that forms the throughhole and the upper plate has a hole that forms an additional throughhole, the fastening element being driven in the hole of the lower plate so as to be driven into the attaching hole of the underlying roof member located below the specific roof member, so that the specific roof member covers the hole of the lower plate with at least a part other than the attaching hole, and the upper plate being positioned between the specific roof member and the overlying roof member located above the specific roof member and an additional fastening element being driven into the hole of the upper plate so as to be driven in an attaching hole of the specific roof member, so that the overlying roof member located above the specific roof member covers the hole of the upper plate with at least a part other than the attaching hole.