Title:
手持ち式工具装置における事故の回避方法および装置
Document Type and Number:
Japanese Patent JP4031851
Kind Code:
B2
Abstract:
A device for and method of preventing accidents caused by jamming of a tool when working with hand-operated machine tools driving a rotating tool, especially hammer drills, is outfitted with an interrupter device for interrupting the action of the driving motor on the rotating tool depending on the operating state detected by a deflection sensor (1). The device includes a computer unit (R) in which a probability for an expected accident is determined from the sensor signals supplied by the deflection sensor (1), and in that the interrupter device (5, 6) can be activated when a preset accident probability is exceeded. In the method rotational movement values are determined from the measurement signals supplied by the deflection sensor (1), these rotational movement values are converted in a computer unit (R) by nonlinear logic operations to form accident probabilities and activating the interrupter device as soon as the estimated accident probability exceeds a preadjustable threshold value.
Inventors:
Vahehatchouri Jezia Alliance
Application Number:
JP27608197A
Publication Date:
January 09, 2008
Filing Date:
October 08, 1997
Export Citation:
Assignee:
Maschinenbau Hilti OHG
International Classes:
G05B9/02; B25D17/10; B25F5/00; B81B3/00; F16P3/00; G05B13/02; H02H7/085
Domestic Patent References:
| JP7253192A | ||||
| JP4055163A | ||||
| JP3017704A | ||||
| JP2186405A | ||||
| JP8061382A |
Attorney, Agent or Firm:
Kenji Sugimura
Kosaku Sugimura
Kiyoshi Kuruma
Shiro Fujitani
Tatsuya Sawada
Kosaku Sugimura
Kiyoshi Kuruma
Shiro Fujitani
Tatsuya Sawada