| 摘要 |
PROBLEM TO BE SOLVED: To keep a normal engagement state of a slit ring mounted in a projecting part of an adapter with a pin for connecting a tooth to the adapter by mounting a compressed elastic member on a clearance between an inner peripheral surface of a lateral hole of the projecting part of the adapter and an outer peripheral surface of the pin. SOLUTION: A tooth 28 comprises a hollowed part 36 capable of inserting and engaging a projecting part 30 formed on a front side of an adaptor 27, and side holes 37, 37 are respectively formed on the left and right side plates of the tooth. The adaptor 27 comprises an approximately annular end bore part 32 concentric with the lateral hole 31 bored on the projecting part 30 on one end surface of the projecting part 30, and a slit ring 33 is mounted in the end bore part 32. A pin 29 is inserted through the side holes 37, 37 and the lateral hole 31, and a concave groove 34 formed on the pin 29 is engaged with the slit ring 33. Then an elastic member 35 made of a synthetic resin material such as a rubber material or the like is compressed and mounted on a clearance V between an inner peripheral surface of the lateral hole 31 of the projecting part 30 of the adaptor 27 and an outer peripheral surface of the pin 29.
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