MXPA96006418A - Device of eyection and cutting of straps and method for flejad machine - Google Patents

Abstract

The present invention relates to an apparatus for ejecting and cutting strip, automatically, for strapping machines, which comprises: the mechanism for feeding the strip, which provides the strip along a normal path of travel of the strip, during normal operation of the machine, the mechanism for tensioning the strap, which cooperates with the strap feeding mechanism, to tension the strapping provided along the normal travel path of the strap by the strap feeding mechanism, during the normal operation of the machine, and the cutting mechanism of the strap, which is interposed between the mechanism to tighten the strap and the feeding mechanism, and is arranged along the normal travel of the strap, so as not to obstruct the strip travel during normal operation of the machine, but which is operated to provide the strip, and direct a downstream section of the strip provides When the belt runs, the strap tension mechanism is also operated when a strip failure occurs, so that it transports this section downstream of the strip provided, along the path of the strip. Exit and eject this section downstream of the strip cut off the machine

Description

DEVICE FOR EYECTION AND CUTTING OF STRAPS AND METHOD FOR STRAPPING MACHINE Cross reference to related applications Two-stage fastening device and method for strapping machine. Obstruction removal device and method for strapping machine. Inertial strap tensioning device and method for strapping machine. Strapping path access device and method for strapping machine. BACKGROUND OF THE INVENTION Field of the invention: The present invention relates to an apparatus for ejecting and cutting strips and methods for strapping machines. In particular, the present invention relates to a device that automatically cuts and ejects strap defects of the strapping machine. Description of the Related Art: In the past, the cutting and ejection of strapping defects of a strapping machine required complex parts that were not fully integrated into the entire strapping machine, by virtue of their separate functions. For example, U.S. Pat. No. 5,287,802 of the prior art related, requires a separate feeding and tensioning device to automatically cut and eject defects of the strip. The provision of separate parts with related functions specifically dedicated to cutting and ejecting strap defects produce problems of additional mechanical complexity and related maintenance disadvantages, additional electronic control systems and, consequently, a higher cost. These and other problems are solved by the invention disclosed herein. SUMMARY OF THE INVENTION The present invention represents several advantages over the prior art systems for cutting and ejecting strapping defects in a strapping machine. An object of the present invention is to provide automatic cutting and ejection of strand defects in a strapping machine. Another objective is to achieve the cutting and ejection of strapping errors using a system integrated to the other conventional functions of a strapping machine. Another object of the present invention is to use the strap feeding devices and tensioning devices to also eject strapping defects of the strapping machine. These and other objects of the present invention are achieved by the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a front view of the present invention. Figure 2 is a top right perspective view of the present invention. DESCRIPTION OF THE PREFERRED MODE With reference to Figure 1, the cutting and ejecting device of the present invention provides a strip cutting element 7 located between a series of first and second tensioning wheels 5 and 6, and a series of first feeder wheels. and second 1 and 2. The strip cutter element rotates about the axis 8 of the band cutter, and may be disposed within a band cutter sleeve 9. During normal operation of the strapping machine, the strip passes without disturbance on an edge of the strip cutting element 7 by its normal path 17. However, in the case of a strapping defect in the downstream of the tensioning wheel, the strip cutting element 7 rotates in a direction that places a strip segment between a cutting and rotating surface 20 of the strip cutting element 7 and a fixed cutting surface 19. The continuous rotation of the strip cutting element 7 cuts the strapping e n that point, and also directs the downstream portion of the cut strip 16, including the strapping defect, into an ejection path 11, and at the same time preventing the normal path 17. A strip pivot guide 18, which can disposed around the second tensioning wheel 6, it rotates to open a clear ejection path, in order to eject the segment with strapping defect. The strap pivot guide 18 can be spring activated. The first and second tensioning wheels 5 and 6, which are used during the normal operation of the strapping device are now activated to remove the strapping 16, including the strapping defect, of the strapping machine, for disposal or recycling. A gear motor 10 can be used to rotate the strip cutter member between the normal position and the cut / eject position. A transmission can be provided to be used in connection with the gear motor 10 to limit the angular displacement of the rotating strip cutter 7. After the strapping defect is completely ejected from the strapping machine, the first and second feed wheels feed the strip by the normal path 17, passing through the strip cutter element that is returned to its normal operative position, and through the conduit for the next work of felting. In this way, the first and second feeder wheels 1 and 2, first and second tensioning wheels 5 and 6 have dual functions, one function during normal beating conditions, and a second function during the automatic strip ejection process. The dual function of the feeder and tensioning wheels allow the simplification and reduction of the total of elements necessary for the strapping machine to perform the required functions. This results in cost reductions, maintenance simplification and reliability increases over the prior art strapping machines. The invention described above also covers the range of equivalents to which it has rights, and is limited only by the following claims.

Claims (8)

1. CLAIMS 1. An automatic strip cutting and ejection device for strapping machine, comprising: strip cutting device, strap tensioning device and strap feeding device, where the strip cutting device is disposed on the normal strip path and which does not obstruct the course of the strip during normal operation, where the strip cutting device is operable to cut a strip, where the strip cutting device directs a section of the upstream stream of the cut strip to an ejection path by means of which the upstream section of the cut strap is ejected by the strap tensioning device.
2. 2. An automatic cutting and ejecting device for a strapping machine as set forth in claim 1, wherein the strip cutting device is a rotating strip cutting element, a rotary cutting surface which is located on an edge of the strip cutting element. , which further comprises a fixed cutting surface separated and adjacent to the rotating cutting surface, where a segment of strip to be cut is disposed between the rotary cutting surface and a fixed cutting surface, where the rotation of the cutting element through a cutting cycle places the rotating cutting surface against the strip member to be cut, and then moves the cutting surface through the strip towards the opposing fixed cutting surface until the strip is cut.
3. 3. An automatic cutting and ejecting device for a strapping machine as set forth in claim 2, wherein the strapping tensioning device is a first tensioning wheel and a second tensioning wheel, wherein the strapping feeding device is a first feeding wheel and a second feeder wheel, wherein the strip cutting element is disposed between the first and second tensioning wheels and the first and second feeder wheels, where the first and second tensioning wheels are rotatable to remove a segment of strap from the strapping machine and send the strip segment to the ejector path and finally outside the strapping machine, where the first and second tensioning wheels have the dual function of tensioning the strip during normal operation and the ejection of the strap segment of the strapping machine in case of a defect in the strap.
4. 4. An automatic cutting and ejecting device for a strapping machine as set forth in claim 3, further comprising a pivot strap guide disposed adjacent to the second tensioning wheel, wherein the pivoting strap guide can be activated by means of a pivot for move away from the normal path of the strip during a cycle of cutting and ejecting the strap defect, where the rotation of the strip guide with a pivot away from the normal path of the strip opens the ejection path for the strip segment that is ejected.
5. 5. An automatic cutting and ejecting device for a strapping machine as set forth in claim 4, wherein the pivoting strap guide is provided with a spring.
6. 6. An automatic cutting and ejecting device for a strapping machine as set forth in claim 5, further comprising a gear motor that rotates the strapping cutter by its range of rotation.
7. 7. An automatic cutting and ejecting device for a strapping machine as set forth in claim 6, further comprising a strapping cutter sleeve accommodating the strapping cutter, wherein the strapping cutter sleeve is stationary.
8. 8. An automatic cutting and ejecting device for a strapping machine as set forth in claim 3, wherein the strapping is automatically fed back to the strapping machine by means of the first and second feeder wheels, upon completion of the strip segment ejection cycle. .