Electricity: circuit makers and breakers – Special application – Stationary feeler detects transient object
Reexamination Certificate
1999-06-29
2001-01-23
Gellner, Michael L. (Department: 2832)
Electricity: circuit makers and breakers
Special application
Stationary feeler detects transient object
C200S061420
Reexamination Certificate
active
06177642
ABSTRACT:
BACKGROUND OF THE INVENTION AND RELATED ART STATEMENT
The invention relates to an adjusting mechanism for a touch sensor attached to a forward edge of an arm provided to a lathe to detect a setting position of a bit and to send a detected signal.
FIGS.
8
(
a
) and
8
(
b
) are a plan view and a front view, respectively, for showing a conventional touch sensor to be connected to an arm of a lathe. In the front view in FIG.
8
(
b
), only an arm is cut at its center to show its section.
As shown in FIG.
8
(
b
), a touch sensor
71
is formed of a housing
73
having a plurality of contact portions
72
, and a flange
74
at a lower part of the housing
73
. When the touch sensor
71
is attached to an arm of a lathe (both not shown), a cylindrical portion
74
a
located below the flange
74
is inserted into a hole of the arm, and a plurality of bolts (not shown) passing through bolt holes
64
b
formed in the flange
74
is fastened to the arm. Incidentally, numeral
75
indicates an O-ring, and numeral
76
indicates lead wires.
A fastened plane surface between the flange
74
and an arm side flange is perpendicular to the respective contacts
72
. In case the touch sensor
71
is attached to the arm, it is required that each contact
72
is perpendicular to or parallel to a center line of a main axis of the lathe. Since the flange
74
and the arm side flange are rotatable around a line Z-Z′, after the contacts
72
are adjusted to be perpendicular to or parallel to the center line of the main axis of the lathe by rotating or tapping an outer periphery of the flange
74
with respect to the axis Z-Z′ while slightly loosening the fastening screws, the fastening screws are tightly fastened.
According to the above described method, it is difficult to make a fine adjustment and is required to make adjustments several times, thus resulting in increase in adjusting steps.
To solve the above described problems, the present invention has been made, and an object of the present invention is to provide an adjusting mechanism for a touch sensor, which has a simple structure and can be adjusted easily.
Another object of the invention is to provide an adjusting mechanism for a touch sensor as stated above, wherein a fine adjustment can be carried out at an extremely short time.
A further object of the invention is to provide an adjusting mechanism for a touch sensor as stated above, wherein the touch sensor can be replaced easily if required.
Further objects and advantages of the invention will be apparent from the following description of the invention.
SUMMARY OF THE INVENTION
In the present invention, a touch sensor is attached to a forward edge of an arm provided to a lathe to detect a setting position of a bit and to send out a detected signal. An adjusting mechanism of the touch sensor includes a fastening device for fastening a flange provided to a housing of the touch sensor and having a reference surface perpendicular to contacts of the touch sensor, and an upper portion of the arm having an opposed surface to the flange for forming a reference surface perpendicular to the contacts; a fitting device for mutually rotating the housing and the arm on the reference surfaces provided to the flange and the arm; and an eccentrically rotating device having an eccentric axis formed of a first axis and a second axis eccentrically provided to the first axis. The first axis is fitted into a circular hole vertically provided in one of the reference surfaces, and the second axis is fitted into a slot provided in the other of the reference surfaces to extend radially from a rotation center of the fitting device. When the eccentric axis is rotated, positions of the contacts can be adjusted to be perpendicular to or parallel to a center of a main axis of the lathe.
Also, an adjusting mechanism of the touch sensor may include a fitting device for rotatably fitting a cylindrical guide of the touch sensor into a hollow hole provided to an upper portion of the arm; a fastening device for fastening a barrel portion provided to the lower portion of the housing of the touch sensor and having a reference surface perpendicular to the contacts of the touch sensor, and an upper portion of the arm having an opposed surface to the barrel portion for forming a reference surface perpendicular to the contacts; and an eccentrically rotating device having an eccentric axis formed of a first axis and a second axis provided eccentrically to the first axis. The first axis is fitted into a hole provided to a side wall of an upper portion of the arm and directed to a center of the arm, and the second axis is inserted into a groove provided to an outer periphery of a cylindrical guide of the touch sensor to be perpendicular to the reference surface.
When the eccentric axis is rotated, the positions of the contacts can be adjusted to be perpendicular to or parallel to a center of a main axis of the lathe.
REFERENCES:
patent: 3462565 (1969-08-01), Hall
patent: 4048879 (1977-09-01), Cox
patent: 5959271 (1999-09-01), Matsuhashi
patent: 60-10106 (1985-01-01), None
patent: 3-15053 (1991-02-01), None
Gellner Michael L.
Kanesaka & Takeuchi
Metrol Co., Ltd.
Nguyen Nhung
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