Title:
CHISEL BIASING MECHANISM, CHISEL HOLDER, AND IMPACT FORCE ADJUSTMENT METHOD OF IMPACT TOOL
Document Type and Number:
Japanese Patent JP2021016929
Kind Code:
A
Abstract:
To provide a chisel biasing mechanism which can transmit impact force of a hammer properly.SOLUTION: A chisel biasing mechanism includes a first shaft member 40 which is inserted into a first through hole 31 provided at a chisel holder 1 and formed with a coil spring support surface part 41. A second through hole is provided at the first shaft member 40. The chisel holder 1 is provided with a third through hole 33 communicating with the first through hole 31. The chisel biasing mechanism includes a second shaft member 50 which holds the first shaft member 40 at a predetermined fixed position. A coil spring 60 is inserted into the first through hole 31 and supports a chisel 3 with an upper end part from below.SELECTED DRAWING: Figure 5
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Inventors:
UCHIKOSHI KOKI
WATABE YUKIO
WATABE YUKIO
Application Number:
JP2019135310A
Publication Date:
February 15, 2021
Filing Date:
July 23, 2019
Export Citation:
Assignee:
AT KYUSHU CO LTD
International Classes:
B25D17/08; B25D17/10
Domestic Patent References:
| JP2000176859A | 2000-06-27 | |||
| JPS59142078A | 1984-08-15 | |||
| JPS57181579U | 1982-11-17 | |||
| JP4995214B2 | 2012-08-08 | |||
| JP2012228768A | 2012-11-22 | |||
| JP2012051095A | 2012-03-15 | |||
| JPH0255199B2 | 1990-11-26 | |||
| JP2588274Y2 | 1999-01-06 |
Attorney, Agent or Firm:
Yasutoshi Iwata
Kitao Matsuura
Yu Yamamoto
Kitao Matsuura
Yu Yamamoto