公开(公告)号：EP1464774A4

公开(公告)日：2005-04-13

申请号：EP02806407

申请日：2002-11-11

申请人： CATERPILLAR MITSUBISHI LTD

发明人： OHNO SHUNJI ,  IWASA KAZUMICHI ,  NAKAJIMA NORIO ,  TSUJI MASANORI ,  OI TSUYOSHI ,  KOUZU YOSHIHISA ,  AGARIHAMA YOSHIHIRO ,  URA SHINYA ,  MIYAKE HIDEYUKI

IPC分类号： B21D22/04 ,  B21D28/10 ,  E01C11/24 ,  E02F9/16 ,  E02F9/24 ,  E04F11/02 ,  E04F11/112 ,  E04F11/16 ,  E04F15/02 ,  E04F15/06 ,  E04G5/08 ,  B21D28/00 ,  B60R3/00

CPC分类号： E04F11/112 ,  B21D22/04 ,  E02F9/16 ,  E04F11/16 ,  E04F15/02 ,  E04F15/02172 ,  E04F15/06 ,  Y10T428/12368

摘要： A non-slip material exhibiting a high non-slip effect and applicable even to a faulty part where a through hole is made. A part 7 swelling from the upper surface 5a of a steel plate 5 in the direction of plate thickness is provided with a recess 8, and a drain path 9 leading from the recess 8 to the upper surface 5a of the steel plate. Inner circumferential surface of the recess 8 and the groove side surface of the drain path 9 are directed substantially perpendicularly to the upper surface 5a of the steel plate and formed by half blanked shearing planes 8a, 9a where a through hule is not made in the steel plate 5.