A machine for dimensional equiped of a device for protecting and safe in the event of failure

摘要

P the machine 10 comprises a shaft of the sensor 42 rises vertically which counterbalances the weight, by a counterweight tire 100. The system of protection comprises two elements of the braking 239, 240 mounted is close to the shaft on either side of the latter. The elements of the braking are solicited in engagement with the shaft by springs, 230, 240 and the connecting rods, 222, 226. A pneumatic jack 210 is opposed to the action of springs as long as it is supplied with air under a pressure sufficient. When the supply pressure of the jack is reduced, for example in the event of failure in the supply circuit, the springs cause the engagement of the braking of the elements of the braking adopting thus, the descent of the shaft of the feeler. / p & & p & is applied to machines for dimensional releves. / p