Installation kit for a pneumatic linear ejector of the type attachable to an arm of a movable arm unwinder

Abstract

An installation kit for a pneumatic linear ejector (1) comprising an ejector (1) having a plurality of segments (2a, 2b, 2c) nested one in the other and slidable over each other, the first segment (2a) and the second segment (2b) having each a respective central seat (3) for the passage and / or accommodation of a chuck (104) configured to grasp a core (106) of a reel (102), the seats (3) being coaxial and defining a central axis (A); the first segment (2a) being defined by an annular cylinder (20) attachable to an unwinder (100) and having a base (21) adapted to face the unwinder (100); the annular cylinder (20) has an outer wall (22) having an opening (15), the kit further comprising an adapter (37) having an annular cavity (16) adapted to be connected with a fluid source and to be positioned at the opening (15) for introducing fluid into said annular cylinder (20)

Description

[0001]The present invention relates to an installation kit for a linear ejector of the type attachable to an arm of a movable arm unwinder. In particular, this ejector is of pneumatic type and is used when unloading reels from self-expanding chucks, mounted to movable arm unwinders. By way of example, the reels may be made of paper, cardboard, corrugated cardboard and flexible sheets in general.[0002]The use of self-expanding chucks mounted to one end of each movable arm of the aforementioned unwinders is known in the art.[0003]These known self-expanding chucks operate by radial expansion of expansion units actuated by an eccentric journal, which is rigidly joined to the supporting drive shaft of the movable arm unwinder.[0004]These expansion units automatically protrude out of the self-expanding chucks as the supporting shaft of the unwinder is rotated and allow a reel to be retained and centered, and its weight to be supported during rotation.[0005]It should be noted that, for eff...

AI Technical Summary

Benefits of technology

The present invention allows for the use of any type of ejector or pneumatic adapter, even if it lacks an opening on the outer wall. This is easy to do in any workshop with tools available. The technical effect of this invention is increased flexibility in the use of pneumatic tools and accessories.

Problems solved by technology

As a result, the core of the reel remains constrained to at least one self-expanding chuck during the unloading operations, which requires difficult manual actions by the operators for removal thereof.

In addition to being hazardous to the operator, these actions often cause damage to the core.

Lower forces may not be sufficient and leave the core of the reel stuck on the chuck, thereby still requiring an action by the operator.

One drawback of the linear actuator as disclosed in the Renova application is that it requires the chuck to be compatible, specifically it requires the shaft to be machined in order to supply a pneumatic connection to the actuator.

As a result, the actuator cannot be typically mounted to a machine that doesn't have one, or the pneumatic actuator cannot be combined with a chuck from another manufacturer.

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