Title:
ROCK DRILL
Document Type and Number:
Japanese Patent JPH1150776
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To prevent damage of a dust collecting part and crush a rock-bead in the condition of preventing generated dust or the like from being scattered by providing a drock drill so constructed that at the time of crushing a rock-bed by a rock drill bit, while a parallel link is oscillated to be displaced to move backward the dust collecting part, the tip of the dust collecting part is pressed to the surface to be crushed according to the energizing force of an energizing member. SOLUTION: The tip of a rock drill rod 8 having a rock drill bit 18 at the tip thereof is covered with a dust collecting part 10, a parallel link 15 supports the dust collecting part 10 in such a manner as to be advanced and retreated on a support part 9, and an energizing member 16 energizes the dust collecting part 10 forward. Accordingly, even if the part to be crushed such as a rock or the like has fall and rise, a hood 14 formed of synthetic rubber or the like provided on the tip of the dust collecting part 10 is firmly pressed to the part to be crushed, whereby the dust collecting part can be prevented from being damaged, and the formation of a gap between the tip of the dust collecting part 10 and the part to be crushed can be prevented not to damage the dust collecting action. According to the energizing force of an energizing member 16, the tip of the dust collecting part 10 is pressed to the surface to be crushed to surely seal the part to be crushed, whereby scattering of dust generated at the time of crushing a rock-bed can be prevented.
Inventors:
SHIBUKAWA TAKAO
TAKEHARA YOSHITAKA
TAKEHARA YOSHITAKA
Application Number:
JP20622697A
Publication Date:
February 23, 1999
Filing Date:
July 31, 1997
Export Citation:
Assignee:
MATSUDA ASTEC KK
International Classes:
E21B21/00; E21B7/02; E21B15/00; E21B19/08; (IPC1-7): E21C11/00; E21C7/00
Attorney, Agent or Firm:
Etsushi Kotani (3 outside)