Method for locking moveable point sections

Details Method for locking moveable point sections Method for locking moveable point sections

B - Operations, Transporting

61

L

B61L 5/10 (2006.01)

Patent

CA 2291130

The invention relates to a device for mechanically locking the end positions of moveable point sections, comprising two positioning rods (12,14) which are respectively connected to one of the point sections and coupled to each other, at least one locking tappet (28) to lock the end positions of each positioning rod, and a power limiting device which disengages locking when the power exerted by the point sections on the positioning rod exceeds a given value. The invention is characterized in that the power limiting device is formed by a coupling device (30,32) that yields under stress and is placed in between the positioning rods (12,14) in addition to a transmission mechanism (16,38) which translates the movement of one of the positioning rods into a movement for unlocking the locking tappet (28).

L'invention concerne un dispositif servant au verrouillage mécanique, en position extrême, de parties d'aiguille mobiles, comportant deux tringles de manoeuvre (12, 14) qui sont reliées chacune à l'une des parties d'aiguille et accouplées l'une à l'autre mécaniquement. Ce dispositif comporte également au moins une pièce de verrouillage (28), servant au verrouillage des tringles de manoeuvre, chacune dans sa position extrême, et un dispositif limiteur de force qui met fin au verrouillage lorsque la force exercée par les parties d'aiguille sur la tringle de manoeuvre dépasse une certaine valeur. Le dispositif présenté se caractérise en ce que le dispositif limiteur de force est formé par un dispositif d'accouplement (30, 32) qui se comprime lorsqu'il est soumis à une sollicitation et est placé entre les tringles de manoeuvre (12, 14), et par un mécanisme de transmission (16, 38) qui transforme le mouvement d'une des tringles de manoeuvre en un mouvement servant au déverrouillage de la pièce de verrouillage (28).

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