{
  "$type": "site.standard.document",
  "description": "The present invention achieves easy manufacturing of a slip stopper that has a great slip stopping effect and can be used for a location where a problem occurs if a though hole is opened therein. After a protruding portion is formed by using a first punching die unit so as to protrude from the…",
  "path": "/patents/1083457",
  "publishedAt": "2004-10-06T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B21D22/04",
    "CATERPILLAR MITSUBISHI LTD [JP]"
  ],
  "textContent": "The present invention achieves easy manufacturing of a slip stopper that has a great slip stopping effect and can be used for a location where a problem occurs if a though hole is opened therein. After a protruding portion is formed by using a first punching die unit so as to protrude from the upper surface of a steel plate 5 in a plate thickness direction, a concave portion 8 and drain channels 9 are formed in the protruding portion by shear planes that face almost perpendicularly to the steel plate upper surface and have been half-blanked so as not to open a through hole in the steel plate by using a second punching die unit 11, whereby it becomes possible to readily manufacture an excellent slip stopper.",
  "title": "METHOD AND DEVICE FOR MANUFACTURING SLIP PREVENTION MATERIAL OF CONSTRUCTION MACHINERY"
}