DETECTING AND PROTECTING DEVICE OF A SHRINK FILM MACHINE
First Claim
1. A detecting and protecting device of a shrink film machine, comprising a plurality of detecting devices connected to respective ones of plural movable expanding assemblies of a bag expanding device of a shrink film machine, each of which movable expanding assemblies includes a supporting rods for shrink films;
- the detecting devices being positioned below the supporting rods;
each of the detecting devices including;
a support seat positioned behind a corresponding supporting rod;
a movable rod passed through the support seat and projecting below the corresponding supporting rod;
a stopping board pivoted to one end of the movable rod;
a shading block joined to one end of the stopping board; and
a sensor positioned on a portion of the movable rod that is faced with the shading block of the stopping board;
the sensor being normally shaded by the shading block;
when the stopping board comes into contact with goods to be wrapped in a shrink film during a course of the movable expanding assemblies moving downwards to place the shrink film around the goods, the stopping board will pivot to a tilting position, and the shading block will no longer shade the sensor.
1 Assignment
0 Petitions
Accused Products
Abstract
A detecting and protecting device includes detecting devices, and an ultrasonic sensor; the detecting devices are connected to respective ones of expanding assemblies of a shrink film machine, and each include a seat behind a supporting rod of a corresponding expanding assembly, a movable rod passed through the seat and projecting below the supporting rod, a stopping board pivoted to one end of the movable rod, a shading block joined to one end of the stopping board, and a sensor positioned on the movable rod and normally shaded by the shading block; if the stopping board comes into contact with goods while a shrink film is being lowered, it will tilt, and the shading block will no longer shade the sensor; the ultrasonic sensor is used for measuring height of the goods such that sealing and cutting action will start immediately after the film encompasses the goods.
18 Citations
4 Claims
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1. A detecting and protecting device of a shrink film machine, comprising
a plurality of detecting devices connected to respective ones of plural movable expanding assemblies of a bag expanding device of a shrink film machine, each of which movable expanding assemblies includes a supporting rods for shrink films; - the detecting devices being positioned below the supporting rods;
each of the detecting devices including;
a support seat positioned behind a corresponding supporting rod;
a movable rod passed through the support seat and projecting below the corresponding supporting rod;
a stopping board pivoted to one end of the movable rod;
a shading block joined to one end of the stopping board; and
a sensor positioned on a portion of the movable rod that is faced with the shading block of the stopping board;
the sensor being normally shaded by the shading block;
when the stopping board comes into contact with goods to be wrapped in a shrink film during a course of the movable expanding assemblies moving downwards to place the shrink film around the goods, the stopping board will pivot to a tilting position, and the shading block will no longer shade the sensor. - View Dependent Claims (2, 3)
- the detecting devices being positioned below the supporting rods;
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4. (canceled)
Specification