|
Two-hand trips are used as a safeguarding
device on a full revolution clutch power press only. This device
requires the joint operation of two trigger buttons located away from the
"danger zone" of the press. Activation of the machine
stroke requires only a "trip" of the controls whereas a two-hand
control requires continued pressure. The two-hand trip requires
the operators hands to be away from the point of operation to activate the
machine stroke.
| Two-Hand Trip
Regulations |
-
When used in press operations requiring more
than one operator, separate two hand trips must be provided for
each operator, and must be designed to require concurrent
application of both operators to activate the slide. [1910.217(c)(3)(viii)(a)]
|
Two-hand tripping device
|
- Two-hand trips' position must be fixed so that only a
supervisor or safety engineer is capable of relocating the
controls. [1910.217(c)(3)(viii)(d)]
 |
When applying
a
two-hand trip
to meet the requirements for a point of operation
safe guarding device, make sure the buttons are
located on the press so they are at least the minimum
safety distance required by the safety
distance (Dm) formula. |
|
This means the palm buttons must be
located far enough away so that after the press is
tripped and the operator releases both palm buttons, the
operator cannot "beat the ram" or reach
into the point of operation or other pinch points before
the dies close.
|
|
|
|
|
|
Back to Top
www.osha.gov
