JPH1094994A - Plastic band chipping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent plastic bands from being left within a guide between a cutting edge and a feed roller. SOLUTION: This device is constituted of a cutting edge for chipping plastic bands 10 fed one by one in the horizontal direction, feed rollers 4 and 5 feeding plastic bands 10 by holding the bands 10 by a pair of rollers and a tubular guide 7 which is provided between the cutting edge and the feed roller and guides the plastic bands 10. In this case, a sensor 8 detecting presence or absence of the plastic bands 10 and a nozzle 9 ejecting air are provided at the preceding stage of the feed roller. After the running short of the plastic bands 10 to be fed is detected by the sensor 8, the space of a pair of rollers is enlarged, air is ejected toward the entrance of the guide 7 from the space of the rollers and the plastic bands 10 are fed to the cutting edge.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an apparatus for shredding a used plastic band.

[0002]

2. Description of the Related Art Plastic bands for packing are collected after unpacking, but they are bulky and are cut one by one. As a plastic band shredding device, a cutting blade that shreds the plastic band sent one by one in the horizontal direction,
Some include a feed roller that feeds a plastic band while being sandwiched between a pair of rollers, and a cylindrical guide that is provided between the cutting blade and the feed roller and guides the plastic band. In the case of this device, the end of the plastic band remains in the guide, but this is addressed by pushing the debris with the next plastic band.

[0003]

However, in the above-described conventional plastic band shredding device, the remnants of the plastic band may not be pushed by the next plastic band, and may be jammed in the guide together with the next plastic band.

The present invention has been made in view of the above circumstances, and has as its object to provide a plastic band shredding device in which a plastic band does not remain in a guide between a cutting blade and a feed roller. .

[0005]

In order to achieve the above-mentioned object, the present invention provides a cutting blade for cutting a plastic band fed one by one in a horizontal direction, and a plastic blade sandwiched between a pair of rollers. In a plastic band shredding device comprising a feed roller for feeding in and a cylindrical guide provided between the cutting blade and the feed roller for guiding the plastic band, a sensor for detecting the presence or absence of the plastic band and a nozzle for jetting air are provided. Is provided at the front stage of the feed roller, the sensor detects that the plastic band to be fed is gone, then widens the interval between the pair of rollers, ejects air from the interval between the rollers toward the guide inlet, and sends the plastic band to the cutting blade. It is characterized by the following.

According to the present invention, when the sensor detects that the plastic band has disappeared, the interval between the pair of feed rollers is widened, and at this time, air is ejected from the nozzle toward the guide inlet from the interval between the rollers. Therefore, the remnants of the plastic band remaining in the guide are discharged from the guide by the air and sent to the cutting blade.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a plastic band shredding apparatus according to the present invention will be described below with reference to FIGS. FIG. 1 is an elevational view showing the entire configuration of the plastic band shredding device, and FIG. 2 is a view taken along the line II-II in FIG. FIG.
As shown in FIG. 2 and FIG. 2, the plastic band cutting device comprises a fixed blade 2 fixed to a frame 1 and a fixed blade 2
And a rotary blade 3 rotatably provided with respect to. The fixed blade 2 and the rotary blade 3 constitute a cutting blade. A pair of feed rollers 4, 5 adjacent to the fixed blade 2
The plastic band 10 can be fed between the fixed blade 2 and the rotary blade 3 by the pair of feed rollers 4 and 5.

[0008] Of the feed rollers 4 and 5, one feed roller 4 constitutes a drive roller, and the other feed roller 5 constitutes a free roller. The feed roller 5 is connected to an air cylinder 6, and the feed roller 5 can be moved toward and away from the feed roller 4 by operating the air cylinder 6. A cylindrical guide 7 for guiding the plastic band 10 is provided between the feed rollers 4 and 5 and the cutting blade.

A sensor 8 for detecting the presence or absence of the plastic band 10 is provided at a stage preceding the feed rollers 4 and 5 and above the conveying path of the plastic band 10.
A nozzle 9 for ejecting air toward the opposing portion of the feed rollers 4 and 5 is provided at a stage preceding the feed rollers 4 and 5. Also, the plastic band 1 is adjacent to the feed roller 4.
0 is provided with a support roller 11 for supporting the lower surface.

Next, the operation of the plastic band shredding device constructed as described above will be described with reference to FIGS. The plastic band 10 is continuously fed to the cutting blade while being sandwiched between the feed rollers 4 and 5. The rotary blade 3 having a plurality of blades is continuously rotating, and the plastic band 10 is cut into small pieces 10 a by the fixed blade 2 and the rotary blade 3.

When the sensor 8 detects that the plastic band 10 to be fed has run out, the air cylinder 6 operates to raise the feed roller 5. As a result, the interval between the pair of feed rollers 4 and 5 is widened.
A jet erupts. Therefore, the remaining piece 10b of the plastic band 10 remaining in the guide 7 (see FIG. 3)
Is discharged from the guide 7 by the air and sent to the cutting blade.

[0012]

As described above, according to the present invention,
Since the plastic band does not remain in the guide, there is no trouble of jamming in the guide, and stable operation can be performed.

[Brief description of the drawings]

FIG. 1 is an elevation view showing one embodiment of a plastic band shredding device according to the present invention.

FIG. 2 is a view taken along the line II-II in FIG.

FIG. 3 is an explanatory view showing the operation of the plastic band shredding device according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 frame 2 fixed blade 3 rotary blade 4,5 feed roller 6 air cylinder 7 guide 8 sensor 9 nozzle 10 plastic band 11 support roller

Claims (1)

[Claims] 1. A cutting blade for chopping a plastic band fed one by one in a horizontal direction, a feed roller for feeding a plastic band sandwiched between a pair of rollers, and a cutting blade and a feed roller. In a plastic band shredding device consisting of a cylindrical guide for guiding a plastic band, a sensor for detecting the presence or absence of the plastic band and a nozzle for ejecting air are provided in front of the feed roller to confirm that the plastic band to be fed has disappeared. A plastic band shredding device characterized by widening the interval between a pair of rollers after detection by a sensor, ejecting air from the interval between the rollers toward a guide inlet, and feeding the plastic band to a cutting blade.