초록 ▼

A gate is provided for temporarily stopping a flow of objects moving along a conveyor. The gate is operated by a pneumatic actuator which overcomes the force of a spring to close the gate. The spring which holds the gate open is preferably a helical torsion spring which exerts relatively even force

A gate is provided for temporarily stopping a flow of objects moving along a conveyor. The gate is operated by a pneumatic actuator which overcomes the force of a spring to close the gate. The spring which holds the gate open is preferably a helical torsion spring which exerts relatively even force against the arm over the entire travel of the arm. Spring tension is adjustable to minimize the force exerted by the spring. The diaphragm of the pneumatic actuator is made to withstand pressures of up to 120 p.s.i.

대표청구항 ▼

A gate apparatus for interrupting a flow of objects moving along a conveyor, comprising: a base including flat plate, for mounting said apparatus to said conveyor, and a housing covering said flat plate; an arm pivotally attached to said housing of said base for movement about an axis of rotation be

A gate apparatus for interrupting a flow of objects moving along a conveyor, comprising: a base including flat plate, for mounting said apparatus to said conveyor, and a housing covering said flat plate; an arm pivotally attached to said housing of said base for movement about an axis of rotation between two positions, one position being an extended position in which a portion of said arm will extend across said conveyor to engage and interrupt the flow or objects thereon and the other position being a retracted position in which said arm will be disengaged from the flow of objects; a spring, substantially enclosed within said housing, for urging said arm into a predetermined one of said two positions, said spring including first and second extensions which are urged apart from one another, said first extension exerting force against said arm; tension adjusting means, substantially enclosed within said housing, for adjusting the tension of said spring, said second extension of said spring exerting force against said tenion adjusting means, said tension adjusting means being movable to a plurality of positions for repositioning said second extension relative to said flat plate of said base thereby adjusting the amount of force exerted by said first extension against said arm; and actuator means, substantially enclosed within said housing, for moving said arm into the other of said two positions over the force of said spring.